Dissertations / Theses on the topic 'Pavimento flexible'
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Correia, Natália de Souza. "Performance of flexible pavements enhanced using geogrid-reinforced asphalt overlays." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-05032015-100057/.
Full textO estudo de pavimentos é de grande importância na Engenharia Geotécnica brasileira devido à crescente necessidade de melhora da situação da rede rodoviária nacional. Para tanto, o desenvolvimento e a aplicação de novas técnicas são necessários, principalmente no âmbito econômico. A técnica do uso de reforços geossintéticos em capa asfáltica é identificada como uma alternativa ao aumento da vida útil do pavimento através da mitigação de trincas por fadiga e de reflexão. No entanto, a maioria das aplicações desta técnica não correlaciona os benefícios estruturais da inclusão do geossintético na capa asfáltica para a melhora do desempenho global do pavimento. O objetivo desta pesquisa é investigar os benefícios estruturais no desempenho de pavimentos flexíveis trazidos pelo reforço de geogrelhas em camadas asfálticas. Ainda neste estudo, será investigada a reposta tensão-deformação destas geogrelhas sobre as condições de tráfego através do uso de ensaios acelerados de pavimento. Um equipamento foi desenvolvido para esta pesquisa e consiste numa caixa metálica de grande porte, em que seções de pavimento em escala real podem ser construídas. O desempenho das seções de pavimento foi avaliado com a aplicação de cargas cíclicas de roda com pressão de contato de 700 kPa. Os materiais que compõem as seções de pavimento incluem solo de subleito, brita graduada simples, concreto betuminoso usinado à quente, emulsão asfáltica e geogrelha de PVA. Foram estudadas uma seção com geogrelha como reforço no recapeamento da camada asfáltica, uma seção idêntica não reforçada, uma seção com uma única capa asfáltica reforçada com geogrelha e uma seção com geogrelha no recapeamento da camada asfáltica, porém com espessura de base reduzida em relação aos demais ensaios. Sensores nas camadas do pavimento mediram tensões e deformações, e deslocamentos plásticos e elásticos na superfície. Deslocamentos ao longo da geogrelha foram monitorados utilizando o sistema tell-tales. Como resultado, mecanismos de reforço foram identificados neste estudo. O uso de uma geogrelha polimérica reduziu consideravelmente as deformações na fibra inferior da capa asfáltica, assim como as tensões verticais nas camadas subjacentes do pavimento. Resistência à formação de trilhas de roda e solevamentos laterais foram também evidenciadas. As medidas de deslocamentos ao longo da geogrelha forneceram entendimento da distribuição de deformações durante o carregamento. Foi identificado o comprimento de geogrelha mobilizado durante os ensaios, mostrando que a aderência entre a geogrelha e as camadas asfálticas e a rigidez da geogrelha asseguraram o desempenho satisfatório das seções de pavimento. Os resultados também mostraram que o efeito do mecanismo de restrição lateral é um mecanismo que governa a melhora no desempenho da capa asfáltica com o uso da geogrelha através do desenvolvimento de resitência ao cisalhamento. Estas observações permitem concluir que a geogrelha na camada asfáltica atua como reforço e não apenas reduzindo a o potencial de trincamento, levando à um aumento no desempenho de estruturas de pavimentos flexíveis.
Torres, Tocas Bryan Ulises. "Evaluación del estado superficial y análisis estructural en zonas críticas del pavimento flexible de la autopista Chiclayo–Pimentel utilizando el método índice de condición del pavimento, región Lambayeque, 2019." Bachelor's thesis, Universidad Católica Santo Toribio de Mogrovejo, 2021. http://hdl.handle.net/20.500.12423/3626.
Full textRupire, Velásquez Kellyn Rossy. "Diseño de pavimento flexible y rígido en la carretera Carhuaz-Chacas-San Luis (Ancash) km 34 al 35." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/11735.
Full textTesis
Medina, Palacios Armando, and la Cruz Puma Marcos De. "Evaluación superficial del pavimento flexible del Jr. José Gálvez del distrito de Lince aplicando el método del PCI." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2015. http://hdl.handle.net/10757/581505.
Full textGallardo, Quiroz Angel Manuel, and Cruz Lizette Alessandra Lopez. "Reducción de deflexiones en la base de pavimento flexible mediante el uso combinado de Geotextiles No Tejidos (GNT) y Base Macadam." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/656165.
Full textPermanent deformations in roads are the main causes of damage to flexible pavements, especially in those built on saturated soft soils. The use of Non-Woven Geotextiles (NWG) in a Macadam Base, placed in the way that it surrounds the entire perimeter of the base, represents a solution for the management of pavement damage, since vertically, it reduces deflections; while horizontally, it avoids the migration of fine particles to reduce the pumping effect. To verify this hypothesis, investigations were carried out in order to determine the materials to be used to optimize the design of the pavement and the final thicknesses of the layers; and simulated bases tests were made to find deflections in a section reinforced with Geotextile and another unreinforced section. Measurement of deflections was achieved by the Light Deflectometry (LWD) test. Finally, a percentage difference of 25.25% could be found between both cases.
Trabajo de investigación
Ressutte, Ailton Frank Barbosa. "Estudo de desempenho de pavimento asfáltico reforçado com tela de aço em rodovia no Estado de São Paulo." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-23062017-142041/.
Full textThe use of the steel mesh as reinforcement of asphalt pavements to combat reflective cracks by reflection is an alternative used since 1980 in European countries. A review of the literature on the use of the steel mesh in the rehabilitation of asphalt pavements shows that its use prevents the appearance of cracks acting as a barrier against its propagation, offers resistance to shearing especially under high tensions and also improves the resistance to fatigue contributing to the longevity of the pavement. However, the potential if its use has been little investigated in Brazilian highways. In this context this project is to develop a new technology for road construction and rehabilitation. The idea is to use steel mesh reinforcement in asphalt roads in order to make road structures more cost effective by improving the lifetime of new constructed roads and by developing an optimal rehabilitation method for existing roads. For this, a research was performed aiming at the analysis of its performance in an experimental section located on the highway SP-354, in the State of São Paulo between the cities of Campo Limpo Paulista and Jarinu, based on the best international practices, using observation of its behavior in the field and laboratory, analysis by means of resilient modulus tests and calculations by backcalculation to verify the effect of the insertion of the screen, still proposing, a methodology of asphalt pavement design considering the range of integrated resilience module values with the screen and the structural deflection reduction factor (K) admissible for reinforcement projects. It was concluded that this reinforcing technique has potential for improvements crack propagation post-cracking behavior and permanent deformation in the asphalt concrete surfacing layer, with a ten fold increase on fatigue life to be expected. A model was developed that may be employed for pavement design modifying a model based on the use of conventional fatigue laws for the asphalt concrete, if the grid is positioned at the tensile zone of the surfacing layer. Finally, it was verified through a technical / economic study that the incorporation of the steel mesh in flexible pavements is an effective alternative and of adequate technical and economic viability.
Carvalho, Carlos Alexandre Braz de. "Estudo da contribuição das deformações permanentes das camadas de solo na formação das trilhas-de-roda num pavimento flexível." Universidade de São Paulo, 1997. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-09032018-170151/.
Full textThis work shows a study to estimate the permanent deformations of soil layers in low cost flexible pavements of São Paulo State. Under the point of view of stress-strain the soils behaviour was investigated through triaxial test with constant confinant pressure and cyclic axial deviator stress, for different conditions of moisture and density of materiais, undergo repeated loading.The stresses aplied in especimens, in laboratory, to study their deformations, were obtained by utilization of two computer programs: ELSYM5 e ILLI-PAVE. Through results of laboratory tests, two mathematical models were investigated for estimate the permanent deforrnations of soils in study. One of them relating the permanent deformation with the number of stress aplications; the other one, relating the permanent deformation with the number and magnitude of stresses aplied and, also, with the mechanic resistance of each soil. Finally, by using that mathematic models, the contribution of the permanent deformations of soil layers in formation of whell\'s path, for different loading leveis, was obtained for two segments of highway, which structure is compounded by the soils in study.
Silva, Eduardo Souza da. "Utilização de resíduo de fresagem de pavimentos asfálticos em bases estabilizadas granulometricamente e em revestimentos asfálticos na cidade de Manaus." Universidade Federal do Amazonas, 2013. http://tede.ufam.edu.br/handle/tede/4622.
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This work aimed to study the reuse of the milled residue of asphalt pavement removed during maintenance of urban roads. In this case study, aggregates and asphalt cement oil (CAP) aged, coming from damaged and subsequently milled through analysis and testing laboratories pavement were analyzed according to each material corresponding to Brazilian Standards (NBR) used in the production of layers the deck, as regards the manufacture of the base and the asphalt coating. The measurement methods for the production of milled mixtures with residual asphalt pavement and their percentages with pure soil were also analyzed, the latter characterized as a low soil bearing capacity in order to achieve the best strength, providing a durability in the underlying layers and reuse of the same milled material for asphalt coating of these layers, with significant savings on their possible applications in future maintenance. Thus, one can avail this stuff to stabilize a soil that did not meet the necessary requirements of the regulatory standards for such purposes, and intuited to give due importance to the concern for environmental issues, which are being addressed particularly sharply in today, minimizing the degradation of deposits of sand and river beds in relation to the removal of boulder, thus decreasing logistics costs, transportation and acquisition of new ones. The experimental results of recycled asphalt mixture to 100% of the milled asphalt pavement waste, evaluated in this study were compared with the results obtained for conventional mixtures and indicated that such a mixture can be used as an alternative for coating urban roads , given the conditions required in regulations on this matter. The ground reference mixtures with milled asphalt pavement residue (RFA) were compatible with the demands of a pavement of heavy traffic volume mechanical behavior. The results were satisfactory, highlighting the positive use of the RFA for application in the base layers of urban pavements. It is noteworthy that studies on the use of this type of waste in pavement, are rare in the city of Manaus and this research adds an exploratory knowledge of their potential applicability.
Este trabalho teve como objetivo estudar a reutilização do resíduo fresado do pavimento asfáltico retirado nas manutenções de vias urbanas. Nesse processo de estudo, foram analisados os agregados e o cimento asfáltico de petróleo (CAP) envelhecido, oriundos de pavimento deteriorado e posteriormente fresado, através de análises e ensaios de laboratórios segundo as normas brasileiras (NBR) correspondentes a cada material aplicado na produção das camadas do pavimento, no que diz respeito à confecção de base e ao revestimento asfáltico. Também foram analisados os métodos de dosagem para a produção das misturas com o resíduo fresado de pavimento asfáltico e suas respectivas porcentagens com o solo puro, este último caracterizado como um solo de baixa capacidade de suporte, no intuito de alcançar a melhor resistência, proporcionando uma maior durabilidade nas camadas subjacentes e ao reaproveitamento do mesmo material fresado para o revestimento asfáltico dessas camadas, com uma economia significativa nas suas possíveis aplicações em manutenções futuras. Assim, pode-se aproveitar esse material para estabilizar um solo que não atendia os requisitos necessários exigidos pelas normas regulamentadoras para esses fins, e no intuído de dar a devida importância na preocupação com as questões ambientais, que estão sendo abordadas de forma bastante acentuada nos dias atuais, minimizando a degradação de jazidas de areia e leitos de rios no que tange à retirada de seixo rolado, diminuindo assim os custos de logística, transporte e a aquisição de novos agregados. Os resultados experimentais da mistura asfáltica reciclada a 100%, do resíduo fresado do pavimento asfáltico, avaliadas nessa pesquisa foram comparados com os resultados obtidos para misturas convencionais e indicaram que tal mistura pode ser usada como alternativa para revestimento de vias urbanas, atendendo os requisitos exigidos em normas referentes ao assunto. As misturas solo de referência com resíduo fresado do pavimento asfáltico (RFA) apresentaram um comportamento mecânico compatível com as exigências de um pavimento de volume de tráfego pesado. Os resultados obtidos foram satisfatórios, ressaltando o emprego positivo do RFA para aplicação em camadas de base de pavimentos urbanos. Ressalta-se que os estudos sobre a utilização desse tipo de resíduo em pavimentação, são raros na cidade de Manaus e essa pesquisa agrega um conhecimento exploratório do potencial de sua aplicabilidade.
Vitorello, Thiago. "Análise de desempenho de estrutura de pavimento flexível da rodovia BR-290/RS no trecho Osório-Porto Alegre." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/16207.
Full textPavement performance prediction models are important tools for pavement management systems. Despite its high importance, specifically in Brazil, little attention has been given to calibration and validation of such models. Generic models are eventually used, even international ones, obtained for rather different conditions of those valid for the managed network. Hence, it is vital for an appropriate road pavement management that representative models of the structural and functional conditions of the associated pavements are defined. This research aims to evaluate the behaviour of the performance of a flexible pavement section of the road BR-290/RS, developing from this assessment, models that are representative of the pavement behaviour tendency. The road BR-290/RS is located between the cities of Osório and Porto Alegre, under concession of Concessionária da Rodovia Osório - Porto Alegre S/A - Concepa, since the year of 1997. One of the main actions to be accomplished by the road concessionary within the period under its administration is the carriageway widening of this road with the construction of a new pavement structure alongside, being this structure the objective of study in this research. The structure consists of an asphaltic layer of 8cm, 15cm of base course, 30cm of sub-base and 60cm of a capping layer. The pavement segments included in the analysis were built between 2000 and 2007. To deliver the objectives of this research, data obtained in deflectometric test campaigns, longitudinal roughness and rutting testing campaigns were gathered. Deflections were assessed in the FWD test campaign of 2007. Longitudinal roughness and rutting were simultaneously obtained with a laser profilometer in tests carried out in the years of 2005, 2006 and 2007. With this data, the behaviour of these parameters were evaluated with the traffic evolution, allowing the development of behaviour tendencies of this structure performance to be derived. In the analysis, the influence of the interventions carried out in the pavement sections after its construction were taken into account, as well as different procedures adopted in the testing campaigns carried out. In regard to the interventions, it was observed that, for the data and structure object of this study, they only had effect in the longitudinal roughness evolution. Statistical analyses were carried out in order to define the best adjustment to each parameter. After the development of such tendencies on the pavement behaviour, they were compared to pavement performance prediction models developed in other researches. For both roughness and rutting, the tendencies presented in the study behaved significantly as the other models found in the technical literature. As to the tendencies regarding deflections, none of the models developed in previous studies evidenced similar behaviour to the one observed in this research, testifying the importance for the development of particular models for each road and structure.
Alberto, Vinícius Maróstica. "Contribuição à avaliação da ecoeficiência na escolha de estruturas de pavimento flexíveis, semirrígidas ou invertidas." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-07022019-084854/.
Full textThe pavement structure selection in Brazil nowadays is based considering the costs of construction and maintenance and the check against design standards, in other words, the choice is made by a technical-economic analysis. Brazilian Federal agencies do not provide standards for a quantitative assessment of energy consumption and atmospheric pollutants emission, using only the economic factor as a decision parameter on two or more pavement structures. Pavement construction and reconstruction of pavement structures consume a large volume of energy while obtaining, processing and applying materials during paving services. Considering the need to account aspects of sustainability in the choice between different types of pavement solution, it was sought to evaluate the emission of pollutants and energy and water consumption for the pavement construction phase. In order to do so, it was evaluated the use of different softwares capable of account the environmental question qualitatively, such as the GreenroadsTM and GreenPave, and quantitatively, such as GaBi, DuboCalc, VTTI / UC, ECORCE-M and PaLATE. PaLATE was chosen to be software used in this study being used in unitary analysis that allowed the elaboration of environmental fingerprint graph. Case studies are presented in three different methodologies. The last suggests the analysis of three solution matrices totaling more than 230 thousand cases that leads to obtaining three prediction equations of CO2 emissions as a function of traffic, subgrade support condition and structural number. At the end, it is suggested the insertion of the environmental part in the pavement choose analysis with the use of the proposed tools, the CO2 forecasting emission equations and the environmental fingerprint graph.
Marceliano, Alcantara Luis Alberto, and Moreno Lucero Francia Sandoval. "Metodología de determinación del módulo de elasticidad de la carpeta asfáltica considerando la congestión vehicular en intersecciones urbanas." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/654085.
Full textCurrently, traffic congestion is a problem in many cities around the world. This problem has not only become synonymous with stress and anxiety for some people, but it has also become a challenge for flooring experts. Congestion not only implies a high increase in load on the roads, but also implies changes in the mechanical properties of the pavement. Vehicle speed, temperature and pavement overload within traffic are components that should undoubtedly be reflected in a methodology, since these are altering the useful life of the roads. This research proposes an empirical methodology for determining the modulus of elasticity in an asphalt mat. This new proposal includes concepts that have not been considered: the influence of congestion. The comparison experiment was carried out between a pathway at a congestion temperature and without congestion, 35 ° C and 25 ° C, respectively. This method was verified by using formulas and modulus of elasticity tests.
Trabajo de investigación
RODRIGUES, John Kennedy Guedes. "Avaliação estrutural de um pavimento flexível de base constituída de solo laterítico, através dos ensaios deflectométricos e pressiométricos." Universidade Federal de Campina Grande, 1992. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/2148.
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Este trabalho consiste na avaliação estrutural de um pavimento flexível de base constituída de Material laterítico, localizado entre os municípios de Sapé, Marí e Guarabira (PB-055), objetivando avaliar o desempenho estrutural da base, bem como das outras camadas que compõem o pavimento, ao longo de 7km. Para isso, como forma de obtenção de parâmetros estruturais para posterior avaliação, optou-se pelos seguin tes ensaios: a) Ensaio Deflectométrico com a viga Benkelman, utilizando-se "metodologia não destrutiva, para avaliação estrutural de pavimentos flexíveis, através da interpretação das Bacias de Deformação" Desenvolvida pelos professores." João M . Fabrício at alii 1988); b) Ensaio Pressiométrico com o Pressiômetro de Pavimentação, desenvolvido por Briaud e Shields na Universidade de Ottawa no Canadá (1979), ensaiando a sub-base e o subleito. Os parâmetros estruturais, obtidos com os respectivos ensaios, além de servirem como indicadores das condições estruturais das camadas do pavimento, foram correlacionados e ajustados matematicamente. No tocante ao desempenho da base laterítica e do pavimento como um todo, observou-se que os parâmetros estruturais deflectométricos obtidos se enquadram dentro dos limites pré-estabelecidos pela metodologia adotada, o que confirmou o seu bom desempenho. Com relação às ajustagens, foram obtidas equações bastante significativas. O que demonstra uma alta afirmação dos dois ensaios utilizados nesta pesquisa, respaldando seus valores teóricos e interpretativos, muito bons para serem utilizados como parâmetros de avaliação de pavimentos flexíveis.
This work describes the structural evaluation of a flexible pavement, 7 Km long linking the districts of Sapé, Marí and Guarabira (PB- 055) Paraiba State, Northeast Brazil. The structural performance of its layers including the lateritic basement was investigated and data were obtained following the methology described below: a) Test Deflectometer with the B e n k e 1 m a n Bean following a. Nondestructive methodology for the evaluation of flexible pavements through the interpretation of the "Basin Deflection" developed by J.M. Fabricio et al (1988); b) Pressuremeter test of both the sub-grade and the sub-base by using the pressuremeter of pavements developed by Briaud and Shields (1979). The results analysed helped as indicators the structural conditions of the layers and also were correleted and adjusted mathematically for the derivation of equations. the structural deflectometric parameters determined for the lateritic basement and for the methodology used and confirmed it's good performance. Analysis of the significant equations developed in this study renders support for the good quality of the tests performance during the investigations recommending them very good for that evaluation of flexible pavements.
Branco, Luiz Henrique Castelo. "MANIAC: uma metodologia para o monitoramento automatizado das condições dos pavimentos utilizando VANTs." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-07082017-152050/.
Full textIntelligent Transport Systems (ITS) is a set of integrated technologies (Remote Sensing, Information Technology, Electronics, Data Communication Systems among others) that aims to provide services and advanced traffic management for road, air, rail and others transportation systems. Obtaining information about characteristics and road pavement conditions is an important part within the sensing these ITS. Investigating new techniques, methods and means to optimize and automate obtaining these information are part of this work, since there are different types of defects on paved roads. Thus, this thesis proposes a methodology that allows automatically obtain information about the condition of the pavement. Data collection was performed with remote sensing technology using Unmanned Aerial Vehicles. Automatic detection was possible through the use of Machine Learning techniques with 99% of accuracy in pavements and 92% in distress identification. As a result we obtained the self-diagnosis, not just the pavement, but different types of distress present in the pavement.
Farfán, Gonzales Fabrizio Jesús, and Díaz José Luis Huaquía. "Análisis de la influencia de las fibras de basalto y lignina en las propiedades mecánicas de mezclas asfálticas en caliente de pavimentos flexibles." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/654546.
Full textThe surface layer of the pavement is exposed to various external agents that challenge its properties. If these agents are not foreseen in the mix design, different deformations are generated, including permanent deformation. Excessive tread deformations provide low levels of serviceability. This problem also generates an additional investment of cost and time in maintenance. The present research studies the effects that basalt and lignin fibers have in the asphalt mix to improve its mechanical properties and thus reduce the deformations in the asphalt mat. Previous research indicated that the suggested percentages of basalt and lignin fibers are 0.3% of the total weight of the sample each. Two asphalt mixes were designed. The first sample represents a conventional mixture made with aggregates from the southern area of Lima, Conchán. The second was made with the same components, but with the addition of the indicated percentages of basalt fibers and lignin. Both samples were subjected to the Marshall stability and flow tests, and the compressive strength test. From the results obtained, it is observed that the incorporation of basalt and lignin increases the stability of the mixture in 6.45%, the Marshall stiffness index in 5.8% and the compressive strength in 4%. The properties allowed, allow to have a mixture with greater resistance and greater durability.
Trabajo de investigación
Kari, Benites Maribel, and Herera Jhonatan Rolando Olortegui. "Propuesta de mejora de la estructura del pavimento flexible reforzado con geocompuesto en la interfaz Subrasante – Subbase en la zona de los Pantanos de Villa – Chorrillos." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/656525.
Full textThe purpose of this research project was to evaluate the use of the geocomposite (Triaxial geogrid and HDPE geomembrane), as reinforcement in the subgrade-subbase interface of a flexible pavement structure. To do this, a design of a pavement structure reinforced with geocomposite is proposed in a section of Av. Prolongación Defensores del Morro-Chorrillos that allows increasing the support capacity of the subgrade, optimizing the thicknesses in the granular layers, and prolonging the life useful of the pavement. For this purpose, the design of a conventional pavement structure and another reinforced with geocomposite were proposed to compare and choose the most optimal design. Data collection was carried out using the MTC vehicle classification formats, visual inspection of the road, soil mechanics study and experimental analysis. After analyzing the data collected, it was determined that the PCI of the section under study is 21%, this means that the level of service of the road is bad and needs intervention. Therefore, the design of three flexible pavement alternatives was carried out: the first alternative is a conventional unreinforced section, while the other two alternatives consist of sections reinforced with triaxial geogrid and HDPE geomembrane. The results obtained show that the pavement reinforced with geocomposite and designed by the Giroud-Han method obtained a 47.62% reduction in the thickness of the flexible pavement structure with respect to the pavement designed by the AASHTO 93 method. Finally, after an economic analysis of the flexible pavement design alternatives, it is concluded that the cost of pavement reinforced with geocomposite is 5.07% lower than that of traditional pavement (AASHTO 93).
Tesis
Kari, Benites Maribel, and Herera Jhonatan Rolando Olortegui. "Propuesta de diseño de pavimento flexible reforzado con Geomalla en la interfaz subrasante - subbase utilizando la metodología Giroud – Han, para mejorar el tramo de la carretera(vía)." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/626363.
Full textThe purpose of this research project was to evaluate the triaxial geogrids, as reinforcement elements in the Subgrade - Subbase interface of the flexible pavement structure, with the aim of optimizing pavement thicknesses, increasing the support capacity of the subgrade and prolonging the useful life of pavement. This paper presents the application of a design methodology for the use of triaxial geogrids, with the technical specifications for the applied design of geogrids inflexible pavements in Peru. The design methodology is focused on the investigations of Dr. J.P. Giroud and Dr. Jie Han, who present a generated confinement effect, between the geogrids and the layer of material on the subgrade. The floors when subjected to tire loads tend to deform, generating rutting on the running surface. With the presence of geogrids in the ground, this rutting is reduced exponentially (Giroud & Han, 2005). For the proposed methodology an application example is developed for the reinforced design, of a paved base, with triaxial geogrid and another without reinforcement. For this example, data was collected with the aid of the vehicle classification formats of the MTC, visual inspection of the road for the evaluation of the pavement condition index (PCI) and laboratory tests; which was executed along the approximately 2.3 km, in which it was observed that the PCI of the section is 21%, this means that the service level of the road is bad, that is, it requires immediate intervention. Through this methodology the use of geogrids implied a decrease in thickness of 33.33%, it should be noted that it must be taken into account that each design will vary according to the project to be executed, therefore, it will depend on the characteristics of the soil, vehicular traffic and reinforcement (Type of geogrid) used.
Trabajo de investigación
Kakuda, Francis Massashi. "Desenvolvimento e a utilização de um equipamento de grandes dimensões na análise do comportamento mecânico de uma seção de pavimento sob carregamento cíclico." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-31052011-115600/.
Full textThis research aims at develop, assembly and test of application of large-scale equipment (width of 1.5 x 1.5 m and height of 1.2 m) for the testing in pavement structures laboratory, with materials, thicknesses of layers and loading conditions similar to the field ones. The research still studied the application of geosynthetics as base layer reinforcement to news pavements by effect of variation in subgrade layer moisture. The loading is cyclic and generated from a pneumatic actuator. The instrumentation is constituted of LVDTs, load-cells and soil pressure transducers that permit monitoring the applied loads and the stress distribution in the interior of the layers, as well as plastic and elastic deformations. The cyclic-loading (frequency of 1 Hz) was applied on a 30-mm-diameter and a 26-mm-diameter rigid plate with force of 40 kN and 20 kN, respectively. From the deflection basin obtained, it is possible, by means of back calculation, the determination of the resilient modulus of the materials and from the deformation basin obtained the equation of permanent deformation in function of the cycle number. The equipment showed a good operation, attended to the expectations and the transducers supplied measures with the precision required.
Aguilar, Aquituari Alvaro Alberto, and Montrone Pablo Alberto Salinas. "Evaluación de la vida útil del pavimento flexible de la vía Conococha – Yanacancha ante el incremento de los ejes equivalentes no proyectados, utilizando la metodología ASSHTO 93." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/625384.
Full textThe present thesis is based on traffic and pavements specialties. With these components, we obtained the calculation of the non-projected equivalent axel loads, as well the structural number of the existing design, in order to determine if it keep the initial useful lifetime period, also we propose an adequate maintenance that allows the way to get the service time. The project review previous traffic studies, and a field work that verifies the data obtained, as well an analysis of the equivalent axes loads projections, the structural number, for this purpose, the ASSHTO 93 methodology is used. From the analysis, it was determined that the road does not have enough infrastructure to keep the service time. Before this problem is proposed corrective maintenance by applying a 2.5 cm layer of asphalt, which will provide the structural reinforcement and improve the passability.
Tesis
Tacza, Herrera Erica Betsabe, and Paez Braulio Omar Rodriguez. "Evaluación de fallas mediante el método PCI y planteamiento de alternativas de intervención para mejorar la condición operacional del pavimento flexible en el carril segregado del corredor Javier Prado." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2018. http://hdl.handle.net/10757/624556.
Full textThe objective of this research project is to propose intervention alternatives that allow improving the operative condition of the pavement that currently presents the segregated lane of “El corredor Javier Prado”, considering that this is a important lane, of exclusive use for buses of the urban transport system that was implemented by the Municipality of Lima. To adequately define the intervention alternatives, the pavement evaluation was previously carried out by applying the Pavement Condition Index (PCI) method based on the Standard ASTM D6433-07, following this work sequence: First, registration of information is done in field where the quantities, types and severities of each existing fault are recorded; Secondly, the calculation of the value of the PCI for the 18 Sample Units and then for all the section under study that is 828 meters long, results in the PCI of quantitative value equivalent to 57 and operational condition qualified as Good. Based on the PCI obtained for the road under study, the following considerations are determined; First, the need to implement intervention measures urgently due to the location of the pavement in the deterioration curve; Secondly, the maintenance to be carried out as an intervention may be of the minor and / or major type, and minor maintenance is planned because the registered failures are located and present quantities of less than 300 m2. Finally, the consolidation matrix is presented with the proposed intervention alternatives for each failure identified in the evaluation; In addition, the results obtained from the analysis and interpretation of the results are presented.
Tesis
Ribas, Jeancarlo. "PARÂMETROS ELÁSTICOS TÍPICOS DE MATERIAIS DE PAVIMENTOS FLEXÍVEIS DO RIO GRANDE DO SUL E SUA APLICAÇÃO EM UMA ANÁLISE DE CUSTO/BENEFÍCIO." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/7868.
Full textA implantação de sistemas viários modernos, com toda infraestrutura necessária para que o usuário trafegue com segurança e conforto, requer elevados níveis de investimentos financeiros. Os gastos substanciais com manutenção e reconstrução precoce de nossos pavimentos são inaceitáveis, uma vez que dispomos de equipamentos de campo e laboratório que permitam melhor entendimento acerca dos materiais e métodos de projeto. Desta forma, esta pesquisa teve como objetivos gerais estruturar-se um banco de dados com materiais e parâmetros elásticos típicos de pavimentos flexíveis do Rio Grande do Sul, através do processo de retroanálise, determinando-se as melhores opções estruturais com vistas à relação custo-benefício, facilitando o trabalho de engenheiros em projetos de pavimentos flexíveis. Foram obtidos os módulos resilientes de cinco rodovias federais localizadas no estado (BR 158, BR 285, BR 287, BR 290 e BR 392), através de retroanálise das bacias deflectométricas coletadas com o equipamento FWD, disponibilizadas pelo DNIT. Após a aplicação de um filtro estatístico baseado no coeficiente de variação percentual, no intuito de eliminarem-se os dados espúrios, gerou-se um banco de dados de módulos resilientes típicos dos materiais avaliados. A partir do banco de dados e de consulta bibliográfica, definiram-se conjuntos estruturais por meio de diferentes combinações entre módulos resilientes e espessuras de camadas comumente utilizadas em pavimentos flexíveis. Utilizando-se os conceitos de análise mecanicista, avaliou-se através do software AEMC, as deformações específicas de tração na fibra inferior do revestimento (t), e de compressão no topo do subleito (c), as quais, posteriormente, subsidiaram a aplicação de modelos de desempenho para fadiga e deformação permanente consolidados na literatura, permitindo a obtenção do número N de eixos padrões para cada conjunto estrutural definido. Em paralelo, empregando-se o sistema de custos rodoviários (SICRO II) do DNIT, orçaram-se os serviços de pavimentação, determinando-se o custo/km para as estruturas previamente definidas. Cruzando-se os dados de custo/km e N crítico (avaliado a partir da comparação dos resultados obtidos pelos modelos de desempenho), obteve-se a relação custo/benefício para todos os conjuntos de dados. Avaliando-se as 100 posições mais econômicas, observa-se que 100% dos conjuntos estruturais possuem as maiores espessuras de concreto asfáltico arbitradas (12,5 cm). Percebese também, a influência do módulo do concreto asfáltico, onde, 88 % das ocorrências entre as 100 primeiras posições possuem o maior módulo resiliente arbitrado. Desta forma, conclui-se que as variáveis que produzem as melhores relações custo/benefício são o módulo e a espessura da camada de concreto asfáltico.
Alecrim, Adson Viana. "Estudo do resíduo de quartzito foliado para emprego em estruturas de pavimentos." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-08092010-124250/.
Full textThe purpose of this study is to present an alternative use for quartzite mining wastes as base or subbase materials of flexible pavements. This proposition may not only reduces environmental impacts of quartzite extraction, but also valorises the quartzite aggregates, mainly for road applications. In Brazil quartzite extraction process produces about 90% of waste, and the use of this residue is still remarkably low. To establish the technical feasibility of employing this waste as pavement material a laboratory study was carried out. Mining residues were collected in four quartzite quarries located in the Southwest region of Minas Gerais, which is one of the most important Brazilian areas of quartzite mining, were characterized. Soil occurrences in the same region were also studied for mixing with quartzite waste. Mechanical properties of soil-quartzite waste aggregate mixtures were determined using California Bearing Ratio and Resilient Modulus tests. Two types of mixtures were evaluated: a gap-graded gradation mixture, in accordance with Nogami and Villibor proposition (1994 and 1995), and a well-graded mixture, according to the traditional granular stabilization criteria. The results show that there is no expressive influence of the quartzite gradation on the mechanical properties of soil-waste aggregate mixtures. The laboratory results indicate a high resistance and a low deformability of soilwaste aggregate mixture, comparable with standard unbounded granular materials and soil-conventional aggregate mixtures. The possibility of using wellgraded mixtures can provide an additional environmental benefit due to the entirely use of all waste fractions, with no need of crushing operation.
Neto, Benedito Coutinho. "Redes neurais artificiais como procedimento para retroanálise de pavimentos flexíveis." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-01022018-122501/.
Full textThis paper investigates a backcalculation procedure using Artificial Neural Networks (ANNs). In the research 35,472 hypothetical deflection basins were used, created by the program ELSYM5. The ANNs training database consisted of these basins, and of the moduli and thickness used to generate them. The input layer of these ANNs was composed by thickness(es) of the pavement layer(s), the deflection basin (in the simulation with the Benkelman beam, beyond of those parameters, the curvature radius included (R)) and the output layer was composed by the resilient moduli of the layers of the pavement. Those data were used as output for the learning process, using the easyNN 3.2 simulator, which is based on Multilayer Perceptron and in the training algorithm Backpropagation. For the backcalculation procedure proposed six ANNs they were implemented: two simulating the procedure for pavement of two layers (a simulating the testing of the Benkelman beam and the other the one of Falling Weight Deflectometer), two for pavement of three layers (simulation with the same equipments) and two for pavement of for layers (simulating the testing described previously). The values founds throught linear regression between the real moduli (ELSYM5) and the predicted of ones for ANN, were obtained determination coefficients (R2) and relative average errors (EMR). These parameters demonstrated a good linear correlation between the real moduli (ELSYM5) and the predicted of ones (ANN). The conclusion .is that ANNs are potent tools for they be used in backcalculation procedures flexible pavements of two, three and four layers.
Silva, Marcelo Corrêa da. "Avaliação Funcional e Estrutural das Vias Asfaltadas do Campus da UFV." Universidade Federal de Viçosa, 2006. http://locus.ufv.br/handle/123456789/3810.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
This work evaluated the asphalt pavements of the Federal University of Viçosa (UFV), where functional and structural data were collected based on the rules of the Departamento Nacional de Infra-estrutura de Transportes (DNIT). The pavements of the campus were divided in homogeneous subparts. In function of technical characteristics of the pavements, some methodologies proposed by the DNIT had little changes because the DNIT s rules used in this work were developed for using in pavements with technical standard, which were different of urban pavements. The functional analyses followed the roles of DNIT 006/2003 PRO e DNIT 009/2003 PRO, for the objectives and subjective superficial evaluations, respectively. In the deflectometer measurements, the methodology proposed by DNER ME 024/94 was used, which is referent to the determinations of the pavement s deflection through the Benkelman beam. More than 80% of the subparts objectively evaluated received scores between terrible and bad . However, in the subjective evaluation, the subparts received scores between good and regular . In the subparts studied on the deflectometer evaluation, according to the roles of the structural evaluation of the DNIT, was observed the necessity of complementary studies, to obtain more data on such pavements and subsequently develop projects aiming the improvement of structural conditions of these pavements. This work consists of the preliminary study of structural conditions survey of the asphalted pavements of the UFV. The analyses and interpretation of the data related to the structural and superficial conditions of these pavements will be used to the supervision and planning of works to improve them.
Este trabalho consta de uma investigação sobre as vias asfaltadas do Campus da Universidade Federal de Viçosa (UFV), onde foram coletados dados funcionais e deflectométricos, baseando-se nas normas do Departamento Nacional de Infra-estrutura de Transportes (DNIT). Para tal, o sistema viário do Campus da UFV foi dividido em subtrechos homogêneos, e devido às características urbanas de suas ruas, algumas metodologias propostas pelo DNIT sofreram pequenas adaptações, pois as normas do DNIT empregadas no trabalho foram desenvolvidas para serem utilizadas em rodovias de padrão técnico diferente de vias urbanas. Para as análises funcionais foram seguidas às normas DNIT 006/2003 PRO e DNIT 009/2003 PRO, para a realização de avaliações superficiais objetivas e subjetivas, respectivamente. Nos trabalhos de medições deflectométricas, utilizou-se a metodologia proposta na norma DNER ME 024/94, que se refere à determinação das deflexões no pavimento através da viga Benkelman. Observou-se, nesta pesquisa, que mais de 80% dos subtrechos avaliados objetivamente receberam conceitos entre péssimo e ruim . Já por uma avaliação subjetiva, os subtrechos analisados ficaram com conceitos entre bom e regular . Quanto aos subtrechos analisados deflectométricamente, verificou-se, segundo as normas de avaliação estrutural do DNIT, a necessidade de estudos complementares, a fim de se obter mais dados sobre tais pavimentos, para que dessa forma sejam feitos projetos de reforço baseados nos critérios de resistência. Esse trabalho é uma fase preliminar de um conhecimento mais abrangente das condições estruturais do sistema viário desta universidade. A análise e interpretação de informações atualizadas, relativas às condições superficiais e estruturais destas vias servirão de suporte ao planejamento de obras de restauração.
Feitoza, José Costa. "Avaliação de duas técnicas de reciclagem de pavimento flexível in situ com adição de cimento portland para a utilização em camada de base, em um trecho da rodovia Visconde de Porto Seguro/SP." Universidade Federal do Amazonas, 2015. http://tede.ufam.edu.br/handle/tede/4377.
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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
This study evaluated two cold flexible pavement recycling techniques "in situ" with the addition of Portland cement (CP II E 32) for the base layer, through analysis of the laboratory tests results and reviews of experimental sections performed on Highway Visconde Porto Seguro / SP, called SP 332, in the granting of DER-SP. Laboratory tests were conducted to prove the influence of the variability of the aggregates and the effect of Portland cement content in the dosage of recycled cold mixtures using mechanical behavior results as evaluation criteria in order to certify the technical quality of recycling layer base. The design of the passages in the experimental track allowed the determination of the flexible pavement recycling methods in situ with the mobile plant KMA 200 and the Wirtgen 2500S equipment for recycling. The monitoring the implementation, by companies, helped to understand the advantages and limitations the set of equipment employed in both recycling techniques of the experimental lane. The monitoring of experimental sections, during and after the construction process, allowed to verify that the cold recycling solution of flexible pavement for technical study, is beneficial to the structural and functional condition thereof.
Esta pesquisa avaliou duas técnicas de reciclagem a frio de pavimentos flexíveis in situ com adição de cimento Portland (CP II E 32) para camada de base, por meio de análises dos resultados de ensaios laboratoriais e avaliações de trechos experimentais executados na Rodovia Visconde de Porto Seguro/SP, denominada de SP 332, sob a concessão do DER-SP. Os ensaios laboratoriais foram conduzidos a fim de comprovar a influência da variabilidade dos agregados e o efeito do teor de cimento Portland na dosagem de misturas recicladas a frio, utilizando resultados de comportamento mecânico como parâmetros de avaliação para atestar a qualidade técnica da reciclagem da camada de base. A concepção dos trechos na pista experimental permitiu determinar os métodos de reciclagem do pavimento flexível in situ com a usina móvel KMA 200 e com a recicladora Wirtgen 2500 S. O acompanhamento da execução, pelas empresas fomentadoras, contribuiu para compreender as vantagens e limitações do conjunto de equipamentos empregados nas duas técnicas de reciclagem da pista experimental. O monitoramento dos trechos experimentais, durante o processo construtivo e posterior a execução, permitiu verificar que a solução de reciclagem a frio do pavimento flexível para as técnicas em estudo, é benéfica para a condição estrutural e funcional dos mesmos.
Loria, Salazar Luis Guillermo, and Padilla Paulina Leiva. "Cómo reforzar pavimentos flexibles con materiales Geosintéticos." Civilizate, 2015. http://repositorio.pucp.edu.pe/index/handle/123456789/114627.
Full textRicca, Leonardo. "Construcción pavimento urbano: barrio Valle Cercano-Córdoba." Bachelor's thesis, Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Escuela Ingeniería Civil, 2013. http://hdl.handle.net/11086/1176.
Full textTrata de la construcción de pavimento flexible con bocacalles de hormigón; adicionalmente, se han realizado todas las obras anexas para garantizar el desagûe de la zona: lagunas de retención, badenes de ingreso a lagunas, etc.
Biroli, Fernanda Cristina. "Comparação dos custos de pavimentos flexíveis e rígidos com base em conceitos de gerência de pavimentos." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-10072017-154321/.
Full textThis research work aims to determine and compare the total cost for both, rigid and flexible pavements. Thus, it analyzes all components of costs related to flexible and rigid pavements during their service lives, i.e., construction cost, maintenance and rehabilitation cost and users cost. For the determination of the construction cost it is considered the most used pavement design methods, as well construction procedures used in Brazil. The maintenance and rehabilitation cost is calculated based on the identification of the main distress types for both flexible and rigid pavements that occur in Brazil. The users cost, function of the pavement surface condition, is calculated from performance models used by Brazilian highway agencies. For a broader comparison of rigid and flexible pavements it is performed a factorial analysis. The main factors to be considered are: subgrade type, pavement layer material and thickness, traffic load and volume, maintenance and rehabilitation strategy. The simulations for the determination of total cost will be done for each cell of the factorial matrix, i.e., for each combination of factors.
Barraza, Eléspuru Giuliana. "Resistencia al deslizamiento en pavimentos flexibles: propuesta de norma peruana." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2004. http://hdl.handle.net/10757/292652.
Full textTesis
Ribeiro, Luciana Moreira Barbosa 1979. "Estudo da drenabilidade de pavimentos aeroportuários através de equipamento do tipo outflow meter." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258199.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
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Resumo: Nos últimos anos o transporte aéreo cresceu expressivamente tanto no cenário nacional como mundial. Assim, a preocupação com a ocorrência de acidentes envolvendo aeronaves também é crescente. Parte significativa dos acidentes aéreos no Brasil e no mundo ocorre em solo, ou seja, na fase de decolagem, aterrissagem ou rolagem da aeronave, podendo estar associados com a aderência entre o pneu e o pavimento. Para a obtenção de uma adequada aderência pneu-pavimento, principalmente em pistas molhadas, a macrotextura da superfície do pavimento deve proporcionar um adequado potencial de drenagem, de forma a eliminar água pelos seus micros canais. O presente trabalho tem como objetivo estudar um método de ensaio de drenabilidade que possa ser empregado de forma sistemática em aeroportos brasileiros de pequeno e médio porte como forma adicional de controlar a segurança operacional com adequada repetitividade e reprodutividade, utilizando-se um equipamento do tipo outflow meter. Deste modo, primeiramente foram executados testes do ensaio com o equipamento em quatro tipos de revestimentos distintos. Para a verificação da repetitividade e da reprodutividade do equipamento foram realizados ensaios de drenabilidade de pavimentos, em três aeroportos de pequeno e médio porte do Estado de São Paulo. Também foi realizado um estudo comparativo da medida indireta de macrotextura obtida por meio da drenabilidade superficial do pavimento com o equipamento do tipo outflow meter e o método tradicionalmente empregado no Brasil para obtenção da macrotextura do revestimento, o ensaio de mancha de areia. O ensaio se mostrou rápido, de simples operação, de baixo custo e com adequada repetitividade e reprodutividade. Além disso, o ensaio em estudo apresentou uma boa correlação com o método da mancha de areia, indicando potencial para a medição da macrotextura do pavimento. Através da correlação obtida foi possível estabelecer um parâmetro adicional para se determinar o momento de realizar uma ação corretiva em pavimentos aeroportuários através do ensaio com o equipamento outflow meter, observando-se o tempo de escoamento limite
Abstract: In recent years, air travel has grown significantly in both the national and global scenarios. Thus, there is also a growing concern for accidents involving aircrafts. A significant portion of the aircraft accidents in Brazil and worldwide occur on the ground, more specifically during takeoff or landing, and may be associated with the adhesion between the aircraft's tire and the pavement. To obtain a proper tire-pavement friction, especially on wet runways, the macrotexture of the pavement should provide adequate drainage potential in order to remove water through the pavement's micro-channels. This study aims to define the criteria and methods of analysis, with reasonable reproducibility and repeatability, for the adherence and drainability of airport pavements in order to provide safe operating conditions during rainfall in small and medium size Brazilian airports. First, tests were conducted to measure the pavement's drainage using equipment such as the outflow meter in four different types of pavement. News tests were conducted to measure the pavement's drainage using the aforementioned equipment in three small and medium airports in the state of São Paulo, Brazil, to measure the reproducibility and repeatability of the tests. In addition, the testing procedure using the outflow meter equipment will be validated through a detailed study of a comparative study of the indirect measurements of the macrotextures using the outflow meter in relation to the ones obtained through the sandpatch tests, a traditional method for determining macrotexture commonly used in Brazil. The criteria and methods of analysis proved to be fast, of simple operation, low cost, and with adequate repeatability and reproducibility. Furthermore, the criteria and methods of analysis were correlated with the sandpatch method, indicating a good potential for measuring the pavement's macrotexture. An additional parameter for determining the time to take a corrective action on airport pavements by using the outflow meter equipment, observing the flow time limit. The obtained correlation allowed for establishing an additional parameter for determining when a corrective action on the airport's pavement is necessary by using the outflow meter equipment for observing the flow time limit
Mestrado
Transportes
Mestra em Engenharia Civil
Silva, Luiz Antônio da. "Sistema de gerencia de pavimentos do DER/SP." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257803.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
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Resumo: Este trabalho versa sobre métodos de levantamento de defeitos e avaliação das condições estruturais, funcionais e de segurança dos pavimentos asfálticos nas estradas estaduais sob a jurisdição do Departamento de Estradas de Rodagem do Estado de São Paulo - DER/SP. Aborda também alguns aspectos administrativos da Autarquia Estadual, aonde atuo como engenheiro de carreira na área de planejamento e de projeto. O DER/SP tem como missão administrar o sistema rodoviário estadual, sua integração com as rodovias municipais e federais e a sua interação com os demais modos de transporte, objetivando o atendimento aos usuários no transporte de pessoas e cargas. Para atender o crescimento acelerado da demanda de tráfego do Estado mais desenvolvido da Nação é imprescindível a ininterrupta execução de serviços de manutenção da rede existente e de construção de novas alternativas. Hoje com a relativa facilidade de acesso a uma ampla e variada tecnologia, aliada a uma crescente quantidade de boas empresas consultoras existentes no mercado, o DER/SP vem procurando desenvolver um Sistema de Gerência de Pavimentos (SGP-DER/SP). Enfim, o Estado de São Paulo que já teve no seu órgão rodoviário oficial a mais importante escola de rodoviarismo brasileira, está se adequando a um novo sistema de gestão para fazer jus à sua condição de principal Estado de um País de índole rodoviária.
Abstract: This master's thesis examines methods for survey and assessment of the structural, functional and safe conditions of asphalt pavements at the roads under the control of the Sao Paulo State Road Department (Departamento de Estradas de Rodagem do Estado de São Paulo - DER/SP). It also discusses some administrative aspects of the DER/SP, where I have worked as an engineer in the planning and project areas, which has the mission to manage the State road system, its integration with local and national roads and its interaction with other transport modes, aiming at providing transportation for people and cargo. In order to meet the fast growing traffic demand of the State of Sao Paulo, which is the most developed State of the country, it is vital to continuously keep the maintenance of the existing road net and the construction of new alternatives. Nowadays, with a relatively easy access to a wide range of technologies together with a growing supply of good consultancy companies, the DER/SP has attempted to develop a Pavements Management System (PMS-DER/SP). Therefore, the DER/SP, which once had been the most important brazilian road school, it has adapted itself to a new management system in order to be entitled to the position of the Road Department of the main State of the country, which is known for its road tradition.
Mestrado
Transportes
Mestre em Engenharia Civil
Rojo, Franco Nicolás. "Ejecución de ensayos y control sobre materiales viales para obras varias." Bachelor's thesis, Universidad Nacional de Córdoba Facultad de Ciencias Exactas, Físicas y Naturales, 2019. http://hdl.handle.net/11086/14319.
Full textPresenta los procedimientos y resultados correspondientes a los distintos ensayos realizados sobre materiales destinados principalmente a la construcción de las distintas capas que componen un pavimento de comportamiento rígido y/o flexible
Orejon, Estrada Edward Vidal. "Propuesta del mejoramiento de la subrasante de pavimentos flexibles usando las geomallas biaxiales en suelos de bajo valor de Soporte California – distrito de Ahuac." Bachelor's thesis, Universidad Continental, 2019. http://repositorio.continental.edu.pe/handle/continental/5165.
Full textHidalgo, Gamarra Joissy Catherine. "Evaluación del sistema de gestión de pavimentos flexibles en el Perú." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2015. http://hdl.handle.net/10757/561355.
Full textBurgos, Estrada Nicolás Gastón. "Comparación de Varias Estructuras de Pavimentos Flexibles y Rígidos, Sector Polpaico – La Trampilla." Tesis, Universidad de Chile, 2008. http://repositorio.uchile.cl/handle/2250/103254.
Full textAzevedo, Angela Martins. "Considerações sobre a drenagem subsuperficial na vida útil dos pavimentos rodoviários." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-14012008-115049/.
Full textThere has been verified, in practice, that the absence of pavement drainage is one of the main factors of early degradation of pavements. More, there are few procedures of design and performance analysis that effectively consider the damage of water during the design period. However, foreign experiments and researches do not establish a reliable correlation between the construction of pavement drainage features and pavement performance. In this text, there has been analyzed the AASHTO (version of 1993) and HDM-4 models, considered the most spread out in the present time. These models consider the damage effects of free water inside flexible or rigid pavement structures. Theoretically, it was verified that the models are sensitive about the influence of the conditions of draining in the pavement performance. It had been analyzed real data of certain roadway network in the interior of the state of São Paulo and it was verified, in practical, that the flexible pavements without paved shoulder, that is, with precarious conditions of drainage, have presented lower performance when compared with structures endowed with paved shoulders more impermeable. It was evidenced the difficulty of adopting the drainage coefficients in the analyzed models, although the great importance of the setting adjusted in the design. It is commented that, beyond the existence of devices of subsurface draining, is necessary to check its continuity and hydraulical capacity throughout the system. It\'s suggested procedures for the hydraulical design of the pavement drainage system and the necessity of considering the economic evaluation throughout a period, in accordance with the waited performance (LCCA - Life Cycle Cost Analysis) when the definition of the conception of road pavements, mainly when submitted the heavy traffic and in unfavorable climatic conditions.
Goñi, Juan Manuel. "Movimientos de suelos: trabajos de nivelación y topografía, obras: varias Córdoba-Provincia de Córdoba." Bachelor's thesis, Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales, 2019. http://hdl.handle.net/11086/14379.
Full textFaúndez, Carvajal Rodrigo Andrés. "Estimación del Coeficiente Estructural del Asfalto Espumado Mediante Análisis de Deflectometría FWD." Tesis, Universidad de Chile, 2011. http://www.repositorio.uchile.cl/handle/2250/104281.
Full textSicha, Flores Gino Gabriel. "Diseño con geosintéticos para la función de separación, filtración y refuerzo en pavimentos flexibles." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2018. http://tesis.pucp.edu.pe/repositorio/handle/123456789/11730.
Full textThe following research examines the use of geosynthetics in flexible pavements on three functions. The methods used to examine these include an overview of the design analysis, technical analysis and economic analysis of the use of geosynthetics. The approach used for this research required an evaluation of the following: first, the application of a non-woven needle-punched geotextile between the granular material and the foundation soil; second, the application of a non-woven needle-punched geotextile as a wrap of longitudinal sub-rows fulfilling the function of filtration. Third, the application of a triaxial reinforcement geogrid for the optimization of the pavement. For the separation function, the design was based on the AASHTO M288-96 standard and on the book "Designing with Geosynthetics" by Dr. Koerner. Through this procedure it was determined that the geotextile to be specified for the present case study would be the commercial geotextile GT320P. The technical analysis focused on the comparison of the number of equivalent axes that can support two pavements in particular. On one hand, a design that maintains effective layer thicknesses, thanks to the use of a separating geotextile. On the other hand, a pavement with less effective thickness of granular material due to the contamination of this with the soil of the subgrade. Through this analysis, it was observed that a subbase contamination of only 0.5 inches, would lead to a reduction of more than 10% of pavement serviceability in all sections. In regard to the economic analysis, the cost of the materials of two solutions was compared for the technical problem presented. One of these options consisted of a pavement that uses sacrificial thicknesses that assure the pavement's long-term serviceability. The other option consisted of evaluating the initial conventional design by adding the specified geotextile. Through this analysis it was determined that for a sacrificial thickness greater than 1 inch, the use of a geotextile would be more profitable instead. Regarding the filtration function, the design was based on the AASHTO M288-96 standard, the FHWA guide, the MTC hydrology manual and the book "Designing with Geosynthetics" by Dr. Koerner. In this way, it was determined that the geotextile specified for this function would be the commercial geotextile GT240. The technical analysis consisted in comparing the traffic supported by a pavement without longitudinal subdrain system to one that includes it in the design. For this, the initial pavement drainage coefficient was reduced to simulate the behavior of this without sub-arrays. From this analysis it was observed that a reduction of 0.1 of the permeability coefficient would reduce the pavement's serviceability by about 30%. Which would justify the use of geotextile for this function. The economic analysis focused on comparing these designs with respect to an estimated life time. It was observed that those pavements without subdrainage with a real life time lower than 6 years would be less profitable than using systems of geotextile subdrainage. Finally, for the reinforcement function, the preliminary design was based on the AASHTO R-50 standard and the program of the company TENSAR was used to carry out the final design corresponding to the TX160 geogrid for pavement optimization. The technical analysis consisted in comparing in a percentage way the variation of serviceability between the design with geogrid and the conventional design. In this case, the use of geogrid increased by more than 20% the pavement's serviceability from sector 3 to sector 6, even in the case of pavement optimization. For sector 1 and 2, the serviceability of conventional design was overcome, but not significantly. Then, through the economic analysis, the cost of the materials of both designs was compared. In this way, it was determined that the design with geogrid generated a saving of more than 10% compared to the initial design. For the topics discussed, a program was developed in Visual Studio in the programming language Visual Basic which facilitated the design and analysis. In addition, technical specifications and plans were made for the three applications of the geosynthetic material which are part of the information to be delivered at the time of carrying out a project.
Tesis
Machado, Denise Maria Camargo. "Avaliação de normas de identificação de defeitos para fins de gerência de pavimentos flexíveis." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-07112013-092252/.
Full textThis study examines methods for assessing the condition of flexible pavements, addressing the various types of pavement distress, their causes and rehabilitation and maintenance activities as a function of the severity and extension of the distresses. It is housed within the theme Pavement Management, which is of great importance to the decision regarding investments necessary to ensure the traffic of vehicles with safety, comfort and, above all, economy, i.e., low vehicle operation costs. The evaluation of pavements allows the identification of construction faults, which occurs suddenly, and it also records the natural pavement wear, contributing to well selected and executed at appropriate times interventions, thus enabling a better utilization of available resources. This work analyses methods for pavement evaluation used in Brazil, in the United States and in France, for pavement management at network and project level, for road, urban and airport pavements, based on objective and subjective evaluations, considering structural and non-structural distresses. It was tried to make a critical analysis with the aim to contribute to a simple and more efficient method to evaluate pavement condition, developed with academic rigor, but easy to be used by technical personnel. The identified weaknesses in methods currently used in Brazil can be minimized by the implementation of concepts already present in international standards. Finally, it is recommended the revision of the Brazilian standard, in order to be performed in a homogeneous way by different technicians who use it, making it more agile, efficient and simple. The proposed changes include: clearer definition of Cracking, clustering of two distresses in Shoving, separation of structural and non-structural distresses, more effective application of levels of severity and extent of distress, evaluation of pavement using the PCI concept.
Gutiérrez, Lázares José Wilfredo. "Modelación geotécnica de pavimentos flexibles con fines de análisis y diseño en el Perú." Universidad Nacional de Ingeniería. Programa Cybertesis PERÚ, 2007. http://cybertesis.uni.edu.pe/uni/2007/gutierrez_lj/html/index-frames.html.
Full textMost of the highways maintained and rehabilitated (MyR) in the last ten years, they have been deteriorated prematurely diminishing the condition and the usefulness of the pavement, demanding corrective and complementary works before the predicted thing. The harvesting of information and the experience has demonstrated that the obtained results not always are congruence with the objectives of the designer. The causes are referred projected traffic of inadequate form, bad valuation of the subgrade, not considered environmental conditions, among others. The present scope of work proposes a rational alternative of geotechnical modeling for the analysis and design of flexible pavements, based on the same used methodologies, extending to a computerized system that facilitates the work of analysis and rehabilitation at project and network level
Luis, Andre Denis. "Utilização do equipamento tipo Falling Weight Deflectometer para medição de deflexão recuperavel para diferentes tipos de pavimentos asfalticos." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258119.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
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Resumo: Esta pesquisa versa sobre a utilização do equipamento FWD - Falling Weight Deflectometer, sendo analisados os diversos aspectos que influenciam nos resultados dos ensaios com o equipamento FWD. Dificuldade de interpretações das especificidades de tipos distintos de estruturas de pavimentos e uma vasta gama de correlações com a Viga Benkelman, as quais foram deduzidas por autores de diversas nacionalidades, demonstram que não há regra harmônica para os estudos. Assim, faz se imprescindível a percepção acurada, a consciência e experiência adquirida do engenheiro de projeto em cada situação. Esta hipótese foi corroborada pelo estudo dos ensaios realizados em malha viária experimental, abordados nesta dissertação. São propostos ainda temas relevantes para futuro desenvolvimento que possam agregar em confiabilidade e em economia dos projetos de pavimentação na Engenharia Nacional. Este trabalho foi desenvolvido utilizando-se a bibliografia sobre deflectometria internacional e brasileira, abrangendo os editais de concessões rodoviárias estaduais e federais.
Abstract: This research is about the use of equipment FWO - Falling Weight Deflectometer, and analyzed the various aspects that influence the results of tests with the FWO equipment. Difficulty in interpretation of the peculiarities of different types of pavement structures and a wide range of correlations with the Benkelman beam, which were derived by authors from different nationalities, shows that there is no rule for harmonic studies. Thus, it is essential to accurate perception, awareness and experience of the design engineer in every situation. This hypothesis was confirmed by the study of tests on experimental road network, discussed in this dissertation. Are still relevant topics proposed for future development that can add reliability and economy of paving projects in the National Engineering. This work was developed using the literature on international and Brazilian deflection, covering the tenders for state andfederal road concessions.
Mestrado
Transportes
Mestre em Engenharia Civil
Langhoff, Jorge Elías. "Proyecto de repavimentado, nuevo perfil tipo y rotonda para las calles de convivencia de Ciudad Universitaria." Bachelor's thesis, Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales, 2015. http://hdl.handle.net/11086/2284.
Full textDesarrolla un plan de reordenamiento territorial y espacio público en Ciudad Universitaria.Trata una estrategia urbana para el ordenamiento, valorización y recuperación del campus como parte de la ciudad, pero preservando su singularidad
Orrego, Cabanillas Daniel Alberto. "Análisis técnico-económico del uso de geomallas como refuerzo de bases granulares en pavimentos flexibles." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2014. http://tesis.pucp.edu.pe/repositorio/handle/123456789/5419.
Full textTesis
Sachet, Taís. "Estudo de propriedades mecânicas de concretos compactados com incorporação de fresados para bases de pavimentos." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-18062013-153946/.
Full textReclaimed Asphalt Pavement (RAP) is a material obtained from asphalt pavement drilled during the restoration of flexible pavements. This material is produced in large amounts in large cities, what justifies the search for alternatives for its final disposal. In this paper, we will see the effects of the addition of RAP on Roller Compacted Concrete (RCC). Six different mixes of RCC were produced. The reference RCC (RCC1) was produced with industrial sand and used to verify the effects of RAP incorporation on mixes: RCC with natural sand (RCC2), RCC with the replacement of 100% of sand with RAP (RCC1AF), RCC with the replacement of 100% of small rocks with RAP (RCC1 PF), RCC with the replacement of 100% of gravel with RAP (RCC1BF) and RCC with the replacement of 50% of natural aggregate with 50% of the total RAP (RCC1FT). The diametral compression and bending traction tests show that the addition of RAP, at any rate, abruptly decreases the strength of specimens compared with the reference RCC, and the decrease was greater for cylindrical specimens. The elastic modulus obtained through the instrumentation of specimens with LVDT (Linear Variable Differential Transformer) and strain gage, as well as those obtained by ultrasonic wave pulse showed significant decreases as compared with the reference RCC. The RCC specimens with added RAP showed a decrease in toughness values and an increase in the spreading resistance of the cracks. Observations through optical microscope, stereoscopic glass and scanning electron microscope show that the interface between the milled aggregate and the cement paste was damaged by the presence of asphalt film in RAP aggregates. Even though the addition of RAP in the RCC mixture decreases the strength of the mixtures and affects all the mechanical parameters, it can still be used as a base and subbase material for paving, since mechanical parameters have been met and make possible its use.
Mayta, Mendoza Max Efrain. "Efecto del % finos de la grava y la temperatura de aplicación de la emulsión asfáltica en la profundidad de penetración de la imprimación en bases granuladas de pavimentos flexibles Huancayo 2017." Bachelor's thesis, Universidad Continental, 2018. http://repositorio.continental.edu.pe/handle/continental/4657.
Full textCosta, Marcelo Oliveira da. "Considerações sobre os métodos de dimensionamento estrutural de pavimentos com camadas recicladas a frio com espuma de asfalto." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-24062016-112354/.
Full textFull-depth pavement reclamation with foamed asphalt has been a successful alternative for the rehabilitation of degraded pavements. In relation to the traditional rehabilitation methods, such as overlays, it has the advantage of provide the correction of the lower layer\'s defects considering the maintenance of the road grade or slight increase of it. Besides that, there are environmental gains, with less consumption for virgin materials and reduction of discarded material volume. However, in Brazil there is no structural design method for this technology, which hinders its use. To develop a design procedure which includes this kind of solution, several international methods were studied, like AASHTO (1993) and CALTRANS, from the USA; TRL386 and TRL611, from England; TG2 guide, from South Africa; and methods derived from the Austroads were studied, both, the interim procedure 2011 and local departments adaptations from Australia and New Zealand. There are divergent opinions of the behavior of the recycled material with foamed bitumen. Some agencies and authors consider the behavior of it similar to the asphalt mixtures, and the failure mechanism cracking due to fatigue. Others define it as similar to modified granular material with high cohesion and disruption due to permanent deformation. Such association is related to the foamed asphalt content usually used in road works. Other aspects that stand for such basecourse material are the gain of strength over time due to cure, even with the beginning of the highway operation and the importance of the remaining pavement\'s layers in design process. These facts were corroborated by case studies and results of the test section built in Ayrton Senna Highway - SP 070, which was monitored through falling weight deflectometer (FWD) measurements for a year. As result of this work, it is proposed a procedure for the structural design of cold recycled pavements with foamed asphalt using deflectometer data that meets the method of paving manual of the Brazilian National Department of Transport Infrastructure (DNIT). Other findings are the technical long-term viability of that solution and the importance of technological control, with emphasis on the deflection monitoring in early pavement operation to ascertain the evolution of the curing process.
Lopes, Flaviane Melo. "Pavimentos flexíveis com revestimento asfáltico = avaliação estrutural a partir dos parâmetros de curvatura da bacia de deformação." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258320.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo.
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Resumo: No Brasil é significativo o crescimento do uso do equipamento tipo Falling Weight Deflectometer - FWD para o levantamento deflectométrico e posterior caracterização estrutural de pavimentos existentes. Esta caracterização ainda é realizada somente através da medida de deflexão máxima. Contudo, o conhecimento isolado da deflexão máxima (D0) pode não ser suficientemente conclusivo para se diagnosticar a condição estrutural do pavimento. Sendo assim, o presente estudo tem como objetivo, por meio de estudo paramétrico, propor uma metodologia simplificada de avaliação da condição estrutural de pavimentos asfálticos com base granular utilizando as medições da bacia deflectométrica. A determinação de parâmetros de curvatura da bacia de deformação, obtidos através de um levantamento deflectométrico, serão utilizados para o desenvolvimento de correlações destes com as deformações críticas geradas na estrutura do pavimento quando solicitado. Através das correlações obtidas, propõem-se modelos simplificados para estimar a vida remanescente de um pavimento em função dos parâmetros deflectométricos. A metodologia proposta mostrou-se promissora. O aproveitamento das informações da bacia deflectométrica pode auxiliar na solução de restauração do pavimento, evitando defeitos precoces por falhas no diagnóstico
Abstract: In Brazil it is significant the increase in the use of an equipment type Falling Weight Deflectometer - FWD for deflection analysis and structural characterization of existing pavements. This characterization is still held only through a maximum deflection measure. However, the isolated association of maximum deflection (D0) may not be conclusive enough to diagnose the structural condition of the pavement. Thus, the current study aims, through parametric study, to propose a simplified structural assessment methodology of asphalt pavement condition with granular base using measurements of deflection basin. The determination of deflection basin parameters, obtained through deflection measurements, will be used for the development of these correlations with significant deformation of pavement structure generated when prompted. Through the correlations obtained simplified models will be proposed to estimate the remaining life of a pavement according to deflection parameters. The proposed methodology has proved to be promising. The use of the information on deflection basin can help out in troubleshooting pavement rehabilitation, avoiding premature failures in diagnosing faults
Mestrado
Transportes
Mestre em Engenharia Civil
Faria, Sandro Henrique de. "O uso do georadar na determinação de parâmetros da estrutura de pavimentos flexíveis." Universidade Federal de Viçosa, 2010. http://locus.ufv.br/handle/123456789/3721.
Full textThis paper aims to analyze the Ground Penetrating RADAR as tool in the determination of the thickness of the layers of the flexible road pavement of automatic way and the density of the asphalt layer supported by integrated testing of GPR and geotechnical data. The first experiment was conducted at the Presidente Dutra highway (BR116), Pirai - RJ, while the data for the second experiment were obtained from the BR040 highway, Sete Lagoas - MG. In order to achieve the objectives of this study, two methodologies were developed: the first one, directed to the identification of the thicknesses of the layers of flexible pavements of automated way; the second one, focused on determining the density of the layer of asphalt surfaces. The first methodology showed promising results, once it presented good classification results for the classes 1 (off-set) and 3 (macadam), however, was confusion between the "blocks" classified for the classes 2 (asphalt) and 4 (subgrade). A possible alternative, for improvement, would be: to use other texture extractor of the wavelet transform family; to use another type of interpolation, using a that better represents the trends of the coefficients to be generated the surface; to increase the number of training and testing samples, or even to use another type of classifier, such as Artificial Neural Networks. However, this is a field that is worth being investigated more deeply, since the results proved to be significant. The second methodology, regarding the correlation of the density of the asphalt layer through the dielectric value, measured by means an ground coupled antenna, of 1,6GHz, using the technique of the reflection, it presented satisfactory values in spite of the few sampling points, showing to be a good alternative to determine indirectly the density of the asphalt layer and for future works in the area.
Este trabalho tem o propósito de analisar o desempenho do RADAR de penetração no solo como ferramenta na determinação das espessuras das camadas do pavimento rodoviário flexível de maneira automática e a densidade da camada de revestimento apoiado em testes integrados de GPR e dados geotécnicos. O primeiro experimento foi realizado na rodovia Presidente Dutra (BR116), município de Piraí - RJ, em quanto os dados para o segundo experimento foram obtidos na rodovia BR040, município de Sete Lagoas - MG. Para atingir os objetivos do trabalho foram elaboradas duas metodologias: a primeira delas, direcionada à identificação das espessuras das camadas de pavimentos flexíveis de modo automatizado; a segunda, voltada para a determinação da densidade da camada de revestimento asfáltico. A primeira metodologia apresentou, de uma maneira geral, resultados promissores, uma vez que foram bons os resultados de classificação para as classes 1 (off-set) e 3 (macadame), no entanto, houve confusão entre os “blocos” classificados para as classes 2 (revestimento) e 4 (subleito). Uma possível alternativa para a melhoria dos resultados seria mudar o extrator de textura utilizado (transformada wavelet), valeria apena testar outros extratores da família wavelet; outra opção seria utilizar outro tipo de interpolador, usando um que pegue mais as tendências dos coeficientes ao se gerar a superfície; também seria interessante aumentar o número de amostras de treinamento e teste, ou até mesmo, utilizar outro tipo de classificador, como por exemplo, Redes Neurais Artificiais. Todavia, esse é um campo que vale ser pesquisado mais profundamente, uma vez que os resultados alcançados se mostraram esperançosos. A segunda metodologia, referente à correlação da densidade da camada de revestimento através do valor dielétrico, medido por meio de uma antena de contato no solo, de 1,6 GHz, utilizando a técnica da reflexão, apresentou valores satisfatórios apesar dos poucos pontos amostrados, mostrando ser uma boa escolha para se determinar a densidade da camada de revestimento de maneira indireta e para trabalhos futuros na área.
Pereira, José Miguel Belucio. "Um procedimento de retroanálise para pavimentos flexíveis baseado na teoria do ponto inerte e em modelagem matemática." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-06072007-084827/.
Full textA backcalculation procedure for flexible pavements is introduced based on inertial point theory for subgrade backcalculation readapted to theoretical deflection basins obtained with the load to Benkelman beam test. Beside subgrade backcalculation, it was developed a factorial mathematical model to obtain equivalent resilient modulus from the layers presents upon subgrade, considered as unique and denominated equivalent layer. To the readaptation of inertial point theory and preparing of factorial model were used theoretical deflection bowls data base generated by ELSYM5 program. The subgrade and equivalent layer modulus backcalculation were evaluated to the proposed process through others similar backcalculation methodologies. The inertial point theory provides the development of simple algorithms, convergent and with unique solution for flexible pavements subgrade backcalculation minimizing the influence of engineer experience in the problem answer. The backcalculation procedure developed in this research is characterized by simplicity being of suitable use at network evaluation level among others.
Carhuapoma, Najarro Cynthia Sthefani Alexandra, and Sánchez Jaime Belisario Tito. "Propuesta de mejora del comportamiento mecánico de Pavimentos Flexibles mediante la aplicación de polvo de fibra de vidrio reciclado sobre subrasante arcillosa de baja plasticidad aplicada al tramo I de la carretera Rodríguez de Mendoza, Amazonas - Perú." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/656814.
Full textCurrently, the functionality of flexible pavements is affected by the deficiency of detailed information in the Pavement Design parameters. Internal failures trigger displacement and deformation problems, which directly affect the functionality of the pavement structure. In Peru, the development of the use of construction materials has led to an increase in the amounts of glass waste and a negative environmental impact. However, these residues have a potential to be used, being incorporated as soil stabilizing agents in subgrade of pavements, due to the useful mechanical properties they possess. This allows reducing the environmental impact and contributing to the implementation of eco-sustainable pavements. In this context, the present research is aimed at developing soil stabilization, a pavement design under the AASHTO methodology and a subsequent analysis of the mechanical behavior of the pavement design carried out. On the one hand, clay subgrade soil stabilization is carried out by applying glass waste powder. On the other hand, the Empirical AASHTO 1993 methodology is used, in order to design the structural package and obtain layer thickness values in scenarios of stabilized soil with the proposed material and another in which the soil is stabilized with other type of material. Subsequently, a comparative analysis of thicknesses and the direct influence of the CBR value in non-stabilized and stabilized samples will be carried out in the pavement design carried out to determine the structural number. Finally, a mechanical behavior modeling is carried out, applying the use of the Windepav computer software to obtain deformation and deflection values in each layer of the pavement for unstabilized and stabilized soils
Tesis