Academic literature on the topic 'Geotextile clogging'
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Journal articles on the topic "Geotextile clogging"
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Palmeira, E. M., R. J. Fannin, and Y. P. Vaid. "A study on the behaviour of soilgeotextile systems in filtration tests." Canadian Geotechnical Journal 33, no. 6 (December 1, 1996): 899–912. http://dx.doi.org/10.1139/t96-120.
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The behaviour of soilgeotextile systems in filtration tests is reported for nonwoven geotextiles under unidirectional flow. A new apparatus was developed to preform filtration tests under an applied vertical stress, and tests were then conducted with different soils and nonwoven geotextiles in order to evaluate the clogging potential and retention capacity of these materials under rather severe combinations of geotextile and soil characteristics. Results show that the geotextiles perfomed well and that observed permeability losses were acceptable even for gradient ratios close to 3. No progressive piping was observed, and it is believed that the retention capacity of the geotextiles may be influenced by their manufacturing process. In general, theoretical predictions for the maximum particle size passing through the geotextile compared well with measurements. Key words: geotextiles, filtration, gradient ratio, permeability, soil retention, clogging.
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McIsaac, Reagan, and R. Kerry Rowe. "Effect of filter–separators on the clogging of leachate collection systems." Canadian Geotechnical Journal 43, no. 7 (July 1, 2006): 674–93. http://dx.doi.org/10.1139/t06-030.
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This paper reports the results obtained after 6 years operation of nine mesocosm experiments that simulate the 50 cm of the drainage layer closest to the leachate collection pipe in a landfill. Five different design configurations were examined involving a 300 mm thick layer of coarse (38 mm) gravel. The designs differed in terms of the presence, nature, and location of a filter–separator layer either at the waste–gravel interface or partway through the gravel. A nonwoven geotextile filter–separator (GTF/S) is shown to reduce clogging of the gravel relative to the no filter–separator or woven GTF/S designs. Some clogging of the geotextiles is reported, with reductions in geotextile hydraulic conductivity of 23% for the woven GTF/S, 74%–89% for the nonwoven GTF/S, and 75%–94% for the nonwoven geotextile partway through the gravel. The clogged nonwoven geotextile filter–separator maintained a higher hydraulic conductivity than the extracted woven geotextile. Of the designs with a filter–separator between the waste and gravel, the granular filter–separator most effectively reduced clogging of the gravel but at the expense of leachate mounding above the sand once the sand layer clogs. The design with a nonwoven geotextile partway through the gravel (GTMF) provides better protection of the underlying gravel from clogging than other designs involving a geotextile.Key words: landfill, waste, leachate, clogging, biofilm, geotextile.
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Mendonca, Marcos Barreto de, Maurício Ehrlich, and Magali Christe Cammarota. "Conditioning factors of iron ochre biofilm formation on geotextile filters." Canadian Geotechnical Journal 40, no. 6 (December 1, 2003): 1225–34. http://dx.doi.org/10.1139/t03-064.
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This paper presents a study of ochre formation on geotextile filters. Ochre is a substance found sticking to solid surfaces of drainage systems and may cause clogging. Ochre formation is discussed based on the new concepts of biofilm development. Ochre formation is the result of microbial colonization and its affinity to iron compounds naturally found in seepage water. The aerobicnonaerobic interface in drainage systems is a very favourable locale for optimum development of iron bacteria. Laboratory studies were done to verify the influence of intrinsic characteristics of the geotextiles and environment on ochre formation. Because flow condition was not considered in the tests, however, these results may not represent real field performance of geotextile filters. Tests of biofilm formation were conducted in Erlenmeyer flasks containing culture mediums for iron bacteria and geotextile samples. Nonwoven polyester, nonwoven polypropylene, and woven polypropylene geotextiles were used in the tests. The study was performed considering different levels of iron concentration, available dissolved oxygen, and pH. Laboratory tests have shown the fundamental importance of iron bacteria activity, type of geotextile, and environmental conditions on ochre formation.Key words: ochre, clogging, filtration, biofilm, geosynthetics.
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KOHATA, Yukihiro. "CLOGGING PROPERTY OF GEOTEXTILE FILTERS." Geosynthetics Engineering Journal 26 (2011): 1–12. http://dx.doi.org/10.5030/jcigsjournal.26.1.
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Miszkowska, Anna. "A study on soil-geotextile interaction using gradient ratio tests." Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 28, no. 2 (July 10, 2019): 235–43. http://dx.doi.org/10.22630/pniks.2019.28.2.22.
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Nonwoven geotextile have been widely used for filtration. In this paper, the clogging potential for a soil-geotextile system were assessed using laboratory tests. An ASTM modified gradient ratio test device was used to determine gradient ratio as well as soil-gradient ratio. One type of nonwoven geotextile and soil were used to simulate the conditions in drainage system. The obtained results indicate that the gradient ratio and soil-gradient ratio increases with time because of clogging mechanism. However, the tested geotextile can be used as fi lter for soil with fine content of 20%.
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Tong, Zhao Xia, Lun Chen, and Shao Peng Zhou. "Effects of Normal Pressure on the Clogging Behavior of Geotextile and Gap-Graded Soil Filtration Systems." Advanced Materials Research 538-541 (June 2012): 2184–89. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.2184.
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The applied loads have a significant role on the filtration property of soil and geotextile systems. This paper investigates the effects of normal pressure on the clogging behavior of geotextile and gap-graded soil filtration systems. The experimental results show that the clogging potential increases as the normal pressure increases. And a critical value for the normal pressure may exist. When the applied normal pressure is less than the critical value, the normal pressure has significant effects on the filtration systems. However, when the applied normal pressure exceeds the critical value, effects of the normal pressure on the soil-geotextile filtration systems are minor.
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Liu, Yili, and Jianguo Liu. "The BioChemical Clogging of Landfill Leachate Collection System: Based on Laboratory Studies." International Journal of Environmental Research and Public Health 17, no. 7 (March 29, 2020): 2299. http://dx.doi.org/10.3390/ijerph17072299.
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Leachate collection system (LCS) clogging is a common operational problem in municipal solid waste (MSW) landfills in China, which can result in high leachate levels that threaten the safety of landfill operations and subsequently increase the leachate leakage risk. In our previous research, a filtration test was conducted and the physical clogging effect was evaluated. To fully analyze the LCS failure, in this study, a set of column experiments were carried out to investigate the biochemical clogging development and mechanisms. Results showed that the biofilm and deposited CaCO3 composed the primary clogging materials. During the experimental period, the hydraulic conductivities in simulated gravel and nonwoven geotextile drainage layers were observed (91.7% and five orders of magnitude reduction), and decreased to 10−4 and 10−8 m s−1, respectively. Therefore, the significance of the geotextile layer in LCS designing needs to be reconsidered. The biochemical clogging was positively correlated with volatile fatty acids (VFAs), and Ca2+ loading and the Ca2+ played the dominant role. Meanwhile, an improved method for analyzing biochemical clogging development was proposed.
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Nishigata, Tatsuaki, R. Jonathan Fannin, and Yoginder P. Vaid. "Blinding and Clogging of a Nonwoven Geotextile." Soils and Foundations 40, no. 4 (August 2000): 121–27. http://dx.doi.org/10.3208/sandf.40.4_121.
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Nishigata, Tatsuaki, and Ichizou Yamaoka. "Measurements of geotextile opening size and clogging phenomenon." Proceedings of geotextile symposium 4 (1989): 49–55. http://dx.doi.org/10.5030/jcigsjournal1986.4.49.
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David Suits, L., TC Sheahan, I.-M. Lee, J.-H. Kim, and LN Reddi. "Clogging Phenomena of the Residual Soil-Geotextile Filter System." Geotechnical Testing Journal 25, no. 4 (2002): 9881. http://dx.doi.org/10.1520/gtj11299j.
Full textDissertations / Theses on the topic "Geotextile clogging"
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Silva, Jorge Luis Vieira da. "Colmatação biológica de geotêxteis." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-06032014-105106/.
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Geossintéticos são materiais cada vez mais aplicados em aterros sanitários, cumprindo diferentes funções como barreiras para líquidos e gases. Na função de filtração, o uso destes materiais não está consagrado, principalmente, em função da possível colmatação total ou parcial dos geotêxteis por ação de microrganismos, a chamada colmatação biológica. Neste contexto, o presente trabalho visa avaliar a colmatação de geotêxteis tecidos e não tecidos submetidos ao fluxo de lixiviado de aterro sanitário. Foram utilizados três geotêxteis não tecidos de gramatura 200 g/m², sendo um de filamento contínuo de poliéster (PET) e dois de fibra curta, porém fabricados com polímeros diferentes poliéster e polipropileno (PET e PP) e um geotêxtil tecido de polipropileno, com gramatura 400 g/m². Para avaliar a colmatação dos geotêxteis montaram-se ensaios de permeabilidade de longa duração em que se mediu a condutividade hidráulica ao longo do tempo. Após os ensaios de permeabilidade, realizou-se microscopia eletrônica de varredura para avaliar o fechamento dos poros dos geotêxteis, além de avaliar o crescimento bacteriano ocorrido no interior do geotêxtil. Os resultados obtidos permitem constatar significativa redução da condutividade hidráulica dos materiais após o período de 30 dias de ensaios, onde notou-se a predominância do processo de cegamento.Geosynthetics materials have been intensively used in landfills in different functions as liquid and gas barriers. As filters, geosynthetics are not completely accepted in designs, since total or partial geotextile clogging can occur for biotic deposition (or impregnation), usually named biological clogging. This work evaluates the clogging on nonwoven and woven geotextiles under leachate flow for landfill application. For this purpose, nonwoven geotextiles with short and long polyester filaments and mass per unit area of 200 g/m² were used, as well as polypropylene and polyester nonwoven geotextiles with mass per unit area of 400 g/m². Cross-plane permeability tests were periodically conducted in geotextiles samples which were under long term leachate flow. After each permeability test, scanning electron microscopy (SEM) was conducted to evaluate the source of pore geotextile clogging, as well as the bacteria growing into the geotextile matrix. Results have shown a significantly reduction on hydraulic conductivity of geotextile filters after 30 days of leachate flow, which was motivated by blinding process.
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Behring, Zachary. "Evaluating the Use of Recycled Concrete Aggregate in French Drain Applications." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5905.
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Recycled concrete aggregate (RCA) is often used as a replacement of virgin aggregate in road foundations (base course), embankments, hot-mix asphalt, and Portland cement concrete. However, the use of RCA in exfiltration drainage systems, such as French drains, is currently prohibited in many states of the U.S. The French drain system collects water runoff from the road pavement and transfers to slotted pipes underground and then filters through coarse aggregate and geotextile. The primary concerns with using RCA as a drainage media are the fines content and the precipitation of calcium carbonate to cause a reducing in filter fabric permittivity. Additional concerns include the potential for rehydration of RCA fines.
The performance of RCA as drainage material has not been evaluated by many researchers and the limited information limits its use. A literature review has been conducted on the available information related to RCA as drainage material. A survey was issued to the Departments of Transportation across the nation in regards to using RCA particularly in French drains. Some state highway agencies have reported the use of RCA as base course; however, no state reports the use of RCA in exfiltration drainage systems. This thesis describes the investigations on the performance of RCA as backfill material in French drains.
RCA was tested for its physical properties including, specific gravity, unit weight, percent voids, absorption, and abrasion resistance. RCA cleaning/washing methods were also applied to evaluate the fines removal processes. The potential for RCA rehydration was evaluated by means of heat of hydration, pH, compressive strength, and setting time. The permeability of RCA was tested using the No. 4 gradation. Long term permeability testing was conducted to evaluate the tendency for geotextile clogging from RCA fines. Calcium carbonate precipitation was also evaluated and a procedure to accelerate the precipitation process was developed.
The results show that RCA has a high abrasion value, that is, it is very susceptible to break down from abrasion during aggregate handling such as transportation, stockpiling, or placing. The most effective cleaning method was found to be pressure washing with agitation. RCA has not demonstrated the tendency to rehydrate and harden when mixed with water. The permeability test results show that the No. 4 gradation does not restrict the flow of water; the flow rate is highly dependent on the hydraulic system itself, however excessive fines can cause large reductions in permeability over time. It has been determined that No. 4 gradation of RCA can provide a suitable drainage media providing the RCA is properly treated before its use.M.S.
Masters
Civil, Environmental, and Construction Engineering
Engineering and Computer Science
Civil Engineering; Structures and Geotechnical Engineering
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Ortiz, Camilo Alberto Hernández. "Desempenho de geotêxteis na filtração de suspensões água-solo." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-17062013-163645/.
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Os geotêxteis não-tecidos desempenham, dentre outras funções, papel relevante na filtração e drenagem de solos. Nesta função, necessitam ter vazios suficientemente grandes para permitir a livre passagem de água e, ao mesmo tempo, vazios suficientemente pequenos para impedir o arraste de partículas, de sorte a evitar a erosão interna do solo. Critérios de dimensionamento para atender a ambos os requisitos estão disponíveis na literatura e são utilizados com sucesso há vários anos. Uma situação menos estudada e compreendida refere-se ao desempenho desses geotêxteis na filtração de água com sólidos em suspensão. Trata-se de uma situação tida como crítica, pela possibilidade de colmatação do geotêxtil por essas partículas, de acordo com diferentes mecanismos. Neste trabalho, verifica-se o desempenho, em laboratório, de geotêxteis não-tecidos frente à filtração de suspensões de solo em água, tal qual poderia ocorrer por ocasião de enxurradas. Nessa perspectiva, tenta-se verificar qual poderia ser o desempenho desses geotêxteis quando utilizados para compor sistemas de proteção da entrada de estruturas de captação de água, como bocas de lobo e bueiros. O trabalho utiliza um geotêxtil não tecido de fibras curtas, fabricado a partir de poliéster e suspensões contendo bentonita e uma areia fina argilosa, solo típico da região de São Carlos, em diferentes concentrações. Estabelecem-se correlações entre diferentes características e propriedades dos geotêxteis estudados e estuda-se o mecanismo de colmatação, que em geral ocorreu para todos os geotêxteis, em intervalos de tempo associados às características do geotêxtil e à concentração de solo na suspensão. As severas condições de colmatação observadas e o comprometimento da permeabilidade dos geotêxteis sugerem que para as concentrações de solo utilizadas, os geotêxteis não seriam capazes de cumprir com a proteção da entrada de estruturas de drenagem.Nonwoven geotextiles play an important role in filtration and drainage of soils, among other functions. In these functions, they need to have large enough internal voids to allow free passage of water and at the same time these voids should be small enough to prevent the passing of particles and preventing piping formation or erosion of soil. Design criteria to satisfy both requirements are available in the literature and have been used successfully for many years. A topic that has not been deeply addressed refers to the performance of geotextiles on filtration of water with suspended solids since the possibility of geotextile clogging is real, impairing its behavior. In this work, the performance of nonwoven geotextiles in laboratory tests designed to observe the filtration of water containing solid particles in suspension is addressed. The tests were devised trying to understand what could be the performance of these geotextiles when used to compose inlet protection systems for drainage structures, such as culverts. The study used nonwoven short-fibers geotextile, made of polyester and suspensions containing bentonite and clayey fine sand, a typical soil of São Carlos area, Brazil, in different concentrations. The laboratory test results show that there exist correlations among different characteristics and properties of geotextiles studied and allowed to evaluate the mechanism of clogging, which generally occurred for all geotextiles, in time intervals associated to some characteristics of the geotextile and to the soil concentration in suspension. The severe clogging observed and the reduction of permeability of geotextile suggest that, for the solids concentration used, the geotextiles could not protect the entrance of drainage structures.
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Rose-Harvey, Keisha M. "Water Flow Through Geotextiles Used to Support the Root Zone of Turfgrass on Sports Fields." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-6970.
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A sports field construction method that uses a geotextile to support the root zone
atop a synthetic drainage structure is an alternative to the common design that uses
gravel drainage material to support the root zone. A study was conducted to address the
concern that fine particles in the root zone may migrate under the influence of
percolating water, clog geotextile pores, and restrict the amount of water drained from a
sports field. In test columns, six root zone mixtures with different particle size
distributions were combined with ten geotextiles with different opening sizes to produce
60 replicated treatments. Water flow through the root zone mixture-geotextile
combinations in the test columns was evaluated over a six-month period. Change in
permeability was assessed by monitoring the temporal distribution of drainage from a
25-mm pulse of water applied to 300-mm deep root zone mixture in the test column.
Particles in drainage water were analyzed for size distribution. The study revealed that
drainage rates were affected more by drainage trough the root zone mixture than through
the geotextile. The amount and particle size distribution of particles in drainage water
were influenced more by root zone mixture than by geotextile. It appeared that in the establishment phase of a sports field that fine particles in the root zone may present more
of a problem to clogging of the root zone pores than clogging of the geotextile pores.
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Weng, Zhen-Xuan, and 翁振軒. "Using Fuzzy Theorem to Evaluate the Clogging of Geotextile-Filter." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/73739620884455356454.
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Kung，Kong-Ming and 龔國銘. "A study on the filtration performance and clogging phenomenon of nonwoven geotextile." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/42950188510642992865.
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Wang, Kuo-Hai, and 王國海. "A study on the Anti-Clogging Potential of Geotextile by the Reverse Flow." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/17984708449645878780.
Full textAbstract:
碩士中原大學
土木工程研究所
89
ABSTRACT In the application field of drainage/filtration of geotextile, the existing reverse water flows always makes the piping takes place much easier even soil soften. The soil mass was washed so that failure happened. However, reverse water flows that are acting on a filtration/drainage system under the unpiping stage will form an anti-clogging affection. A series of simulation tests will perform to study the affections of the reverse water flows to the anti-clogging performance of the geotextiles. In order to estimate affections of the clogging behavior caused by reverse water flows to the soil-geotextiles filtration/drainage system and the performing of soil filtration layer. A test device modified from the Hydraulic Conductivity Ratio Test recommended by Williams and Abouzakhm was used to simulate the test with direct and reverse water flow in a soil. And a set of electronic water pressure transducers were involved into this test to overcome the disadvantage of HCR test which is not able to evaluate the water head distribution inside the soil mass. The electronic water pressure transducers penetrated in to the soil mass through the rubber membrane exactly measured the water pressure distribution inside the soil mass. With consideration the content of fine particles and the gradient of the revere water flows would be the most important influence factors to this application study. There are two geotextiles, two grained soils were used in this study with three gradients of the reverse water flows. Beside, Bubble Point Method was also used to evaluate the pore size distribution of the geotextile before and after the filtration/drainage behavior, then the pore size change of the geotextile in the filtration/drainage behavior would be known. Concluded with the tests results, the influence of reverse water flow to the conductivity of the system is more serious with the 10% fine particles content soil sample（i>=20）reverse water flow condition. The overlay soil would have more chance to perform a piping phenomenon. The influence of the reverse water flow with the 30% fine particles content soil sample the system also showed a better performance to retain the soil particles. By analyzing the test results from modified HCR tests, when the fine particle content of soil sample is lower, the clogging and blocking effect with in the geotextile layer is more serious. And when the fine particle content of soil sample is higher, the main reason of the system conductivity goes down is because of the performing of impervious layer of the soil sample. Before the serious piping stage, reverse water flows perform a positive effect to the geotextile anti-clogging potential. It seems that the reverse water flow is valuable to applied the washing behavior with the geotextile in the filtration/drainage application in order to extend the lifetime of geotextile on filtration/drainage application field.
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Chen, Shiu Yet, and 陳仕岳. "A study on clogging behavior of the nonwoven geotextile using gradient ratio test." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/42788984171428252191.
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Huang, Chun-Kai, and 黃俊凱. "A Study on the Hydraulic Gradient and Effective Stress Condition to Anti-Clogging Effect of Geotextile." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/49538662003799010583.
Full textAbstract:
碩士中原大學
土木工程學系
88
William and Abouzakhm (1989) proposed a test named HCR (Hydraulic Conductivity Ratio) by using the triaxial apparatus to simulate the boundary conditions of the soil-geotextile interaction and to conduct the effective stress and “high saturation” tests. The results explained the behavior of the filter-drainage system and to verify the failure of the system. However, if the soil-geotextile combination is bad, the test cannot explain the reason of the failure. This research is to use the triaxial permeameter to modify the hydraulic conductivity ratio test. In the research, the electronic micro pore water pressure gauge developed by NANJING Hydraulic Science Research Institute was employed to probe the soil sample within the rubber membrane. This device can control the distribution condition of the pressure head and to distinguish the clogging of the geotextile and soil drainage. Holtz and Luna (1989) pointed out that there is a tight relationship between the clogging of geotextile and its porosity distribution. Hence, based on the Modified Hydraulic Conductivity Ratio test adapted with the Bubble Point method, the differences of size opening of the geotextile sample before and after the modified HCR can be accurately controlled in order to understand the clogging degree within the filter-drainage system, when soil particles pass through. According to the test results, when the content of the fine-grained material increased, the geotextile conductivity was not the major variable that affects the system conductivity and the system hydraulic conductivity of using the three different types of geotextile remained the same at the end. Furthermore, under the effective stress, the difference of the porosity distribution before and after test vs. the modified hydraulic conductivity. However, the more the fine-grained soils, the smaller the porosity distribution range. The phenomenon is particularly distinguished for the small porosity. When the fine-grained soil fraction was 30%, there is no shrinkage of the size opening.
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Hou, Hung Chia, and 侯宏佳. "A study on clogging behavior of the nonwoven geotextile by using electronic micro pore water pressure sensor." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/63437987471822312322.
Full textAbstract:
碩士中原大學
土木工程學系研究所
86
Clogging potential is a major concern when geotextile is used in filtration/drainage systems. Various methods are available for determining the clogging potential of geotextile. Gradient ratio test (GR test) is widely applied for its convenience and shorter test duration. Chang and Nieh (1996) reviewed the conventional GR test and raised several recommendations for improving performance. Based on Chang and Nieh’s recommendations, S.Y. Chen (1996) devised a modified gradient ratio device that provides better performance of water pressure distribution over the specimen. Electronic micro pore water pressure sensor developed by the China Nanjing Hydraulic Research Institute is used instead of conventional implanted measuring tube for the study of the re-distribution of fine soil granules after the GR test. The anterior portion of the lead tube of the sensor is made of ceramic porous stone that can eliminate the interference of fine granules with interface material. The use of electronic water pressure sensor not only prevents undesirable effects during specimen preparation but also during the removal of bubbles. More importantly, it senses the water pressure distribution instantaneously. Findings indicate that for fine contents over 30%, blinding phenomenon may occur at any layer of the specimen, rather than in the 2.54cm layer above the geotextile. After the GR test, soil specimen in the 2.54cm layer above the geotextile is collected for analysis. Results reveal that the distribution of size of lost soil particles is related to the pore size of the geotextile. Findings also indicate that higher fine contents require a longer time to reach the stable state of the GR value.
Books on the topic "Geotextile clogging"
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Koerner, Robert M. Landfill leachate clogging of geotextile (and soil) filters: Project summary. Cincinnati, OH: U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, 1991.
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Koerner, Robert M. Leachate clogging assessment of geotextile and soil landfill filters: Project summary. Cincinnati, Ohio: National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1995.
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McKnight, Suzanne Jane. The potential causes of clogging of geotextile filters in landfill sites. [London]: Queen Mary and Westfield College, 1992.
Find full textBook chapters on the topic "Geotextile clogging"
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Miszkowska, Anna, Eugeniusz Koda, Anna Sieczka, and Piotr Osiński. "Laboratory Tests of the Influence of Clogging on the Hydraulic Properties of Nonwoven Geotextiles." In Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2, 686–91. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2224-2_85.
Full textConference papers on the topic "Geotextile clogging"
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Xiao, Ming, and Lakshmi N. Reddi. "Comparison of Fine Particle Clogging in Soil and Geotextile Filters." In Geo-Denver 2000. Reston, VA: American Society of Civil Engineers, 2000. http://dx.doi.org/10.1061/40515(291)12.
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Bailey, T. D., M. D. Harney, and R. D. Holtz. "Rapid Assessment of Geotextile Clogging Potential Using the Flexible Wall Gradient Ratio Test." In Geo-Frontiers Congress 2005. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40782(161)1.
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Miszkowska, Anna. "FILTRATION AND CLOGGING BEHAVIOUR OF NONWOVEN GEOTEXTILES." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/1.2/s02.034.
Full textReports on the topic "Geotextile clogging"
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Qamhia, Issam, and Erol Tutumluer. Evaluation of Geosynthetics Use in Pavement Foundation Layers and Their Effects on Design Methods. Illinois Center for Transportation, August 2021. http://dx.doi.org/10.36501/0197-9191/21-025.
Full textAbstract:
This report presents findings of a research effort aimed at reviewing and updating existing Illinois Department of Transportation (IDOT) specifications and manuals regarding the use of geosynthetic materials in pavements. The project consisted of three tasks: evaluate current IDOT practice related to the use of geosynthetics; review research and state of the practice on geosynthetics applications, available products, design methods, and specifications; and propose recommendations for geosynthetic solutions in pavements to modernize IDOT’s practices and manuals. The review of IDOT specifications revealed that geotextiles are the most used geosynthetic product in Illinois, followed by geogrids. Several of IDOT’s manuals have comprehensive guidelines to properly design and construct pavements with geosynthetics, but several knowledge gaps and potential areas for modernization and adoption of new specifications still exist. Based on the review of the available design methods and the most relevant geosynthetic properties and characterization methods linked to field performance, several updates to IDOT’s practice were proposed. Areas of improvement are listed as follows. First, establish proper mechanisms for using geogrids, geocells, and geotextiles in subgrade restraint and base stabilization applications. This includes using shear wave transducers, i.e., bender elements, to quantify local stiffness enhancements and adopting the Giroud and Han design method for subgrade restraint applications. Second, update IDOT’s Subgrade Stability Manual to include property requirements for geogrids, geotextiles, and geocells suitable for subgrade restraint applications. Third, establish proper standards on stabilization, separation, and pumping resistance for geotextiles by incorporating recent research findings on geotextile clogging and permeability criteria. Fourth, promote the use of modern geosynthetic products, such as geotextiles with enhanced lateral drainage, and fifth, elaborate on proper methods for construction/quality control measures for pavements with geosynthetics.