Academic literature on the topic 'Roads Maintenance and repair'
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Journal articles on the topic "Roads Maintenance and repair"
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Gogolev, V., and M. Barysheva. "International and national practice for estimating cash expenditures of road replacement, repair and maintenance." SHS Web of Conferences 112 (2021): 00041. http://dx.doi.org/10.1051/shsconf/202111200041.
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The paper considers the importance of the uninterrupted functioning of the transport network, which is the most important condition for eliminating the transport inaccessibility of Arctic territories of the regions, thus excluding transport discrimination of the population living in the Arctic zone of the Russian Federation. Besides, the paper provides a brief overview of international road repair and maintenance experience on the example of Norway, analysis of the standard for repair and maintenance of roads in the Russian Federation, proposals on the method of calculating the cash expenditures of replacement, repair and maintenance of roads in the Russian Federation. The Decree of the Government of the Russian Federation No. 658 dated May 30, 2017 approved the standards of financial expenditures and the rules for calculating the size of federal budget allocations for replacement, repair and maintenance of federal roads. However, at the moment, not all regions have updated the regulatory framework on the norms of financial expenditures and the rules for calculating budget allocations for replacement, repair and maintenance of regional and inter-municipal roads. The existing methodology for calculating the cost of repair and maintenance of roads in the Arctic territory of Russia does not fully provide the need to bring the existing roads into normal transport and operational condition for their safe operation. The analysis shows that there is no systematic work to ensure sustainable financing of the road economy in the republic and the road industry is financed at a level much lower than the actual needs.
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Paliichuk, T. V. "The Principle of «Positive Amount» in the Road Sector: Decentralization of Roads." Business Inform 12, no. 515 (2020): 369–77. http://dx.doi.org/10.32983/2222-4459-2020-12-369-377.
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The article is aimed at disclosing the issue of financial support for the construction, reconstruction, repair and maintenance of motor roads in the context of implementation of budget decentralization and decentralization of road management. The article specifies the steps taken towards implementation of decentralization in the sphere of road infrastructure of Ukraine and the introduction of budget decentralization: distribution of functions and powers in the road sphere at the subregional level of management and the updated mechanism of financing the road industry. Both the dynamics of formation and distribution of the State Road Fund and the status of distribution of subvention on the streets and roads of settlements are analyzed. The vision of the main risks of financial support for the maintenance of streets and roads of communal property in settlements in 2021 is disclosed. The directions of improvement of the system of financial support for the construction, reconstruction, repair and maintenance of motor roads are proposed, including in particular: the need to deepen diversification of sources of formation of the State Road Fund; consolidation of the proper guaranteed part of the State Road Fund’s costs for the maintenance of streets and roads of communal property in settlements; balancing the expenditure load and financial support for the implementation of road projects; increasing the level of transparency of decision-making in the distribution of financial resources intended for the construction, reconstruction, major, ongoing repair of motor roads.
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Amadi, Dwi Nor, Pradityo Utomo, and Arief Budiman. "Design and Build of Road Damage Information System in Madiun Regency Using Web Development Life Cycle Methods." Journal of Information Systems and Informatics 4, no. 4 (December 3, 2022): 1112–25. http://dx.doi.org/10.51519/journalisi.v4i4.412.
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Government infrastructure development is growing rapidly, starting from the central and provincial levels. One of the infrastructures currently being pushed by the government is road infrastructure. Both toll roads, regional roads, and district/city roads. Road infrastructure that has been built requires maintenance and repair. Road damage maintenance and repair in urban districts, especially Madiun Regency, Existing Road damage data is still recorded manually using paper, where the government needs help knowing data on road damage that has been recorded, which road conditions have not been repaired, and which have been fixed immediately. Because manual data is prone to wear and loss, tucked in with other manual files. So, the road improvement priority in Madiun Regency still needs to be put on target. For this reason, an information system is required to record the damage to road infrastructure in Madiun Regency. This information system was built using the web development life cycle (WDLC) method. We chose this method because it can be used in all web application development processes and can be modified or added to prototyping and looping to maximize results. The information system for road damage in Madiun Regency was developed using the PHP & MySQL programming languages. The result of this study is a road damage information system that contains updated data on road damage conditions in the Madiun district. Apart from being paperless, digitized data has the advantage of minimal damage and expected data loss and can help decision-makers prioritize repairs by looking at the data in the road damage information system.
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Satyam Shivam. "Assessments of Inventory and Condition for Culverts." Power System Technology 48, no. 1 (June 6, 2024): 1840–65. http://dx.doi.org/10.52783/pst.460.
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In recent times road infrastructures mean bridges and when the matter comes to repair and maintenance for any roads the main attraction is always bridges and pavements. The culverts are always neglected or least valued in terms of repair and maintenance. Culverts are mostly used for cross drainage on highways and railways. As the culverts are not considered a primary priority for maintenance the degradation of culverts causes major concern for road infrastructure safety. As the culverts are an essential part of road infrastructures it becomes important to survey each culvert regularly. Thus, this research focuses on accessing culverts of selected roads of Madhya Pradesh (India) and creating or providing a proper inventory and condition rating system or formats to note down and access the condition of each culvert. This assessment or system will help in maintenance planning and enhance the culverts’ life span. This assessment system will help in an efficient culvert management plan. DOI: https://doi.org/10.52783/pst.460
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Ferdinand Trestanto, Sigit Pranowo Hadiwardoyo, Jachrizal Sumabrata, and Riana Herlina Lumingkewas. "Road Repair Delay Costs in Improving the Road Rehabilitation Strategy through a Comprehensive Road User Cost Model." International Journal of Engineering and Technology Innovation 14, no. 3 (May 16, 2024): 254–70. http://dx.doi.org/10.46604/ijeti.2024.13334.
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This study delves into quantifying the adverse effects of road damage on users, particularly focusing on the increased travel time and consequent financial burdens stemming from delayed repairs. Utilizing a comparative method, the research underscores notable reductions in speed and prolonged travel times due to damaged roads, leading to substantial economic losses for road users. To streamline the estimation of road user costs (RUC), the study proposes a simulation model that incorporates varying traffic volumes and repair delays. This model demonstrates a high level of accuracy in estimating RUC, revealing heightened sensitivity to fluctuations in traffic volume and repair delays compared to agency costs. Consequently, the research underscores the imperative of implementing effective repair strategies to alleviate these impacts efficiently, thereby emphasizing the significance of timely infrastructure maintenance in mitigating financial burdens on road users.
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Salcedo, Edwin, Mona Jaber, and Jesús Requena Carrión. "A Novel Road Maintenance Prioritisation System Based on Computer Vision and Crowdsourced Reporting." Journal of Sensor and Actuator Networks 11, no. 1 (February 14, 2022): 15. http://dx.doi.org/10.3390/jsan11010015.
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The maintenance of critical infrastructure is a costly necessity that developing countries often struggle to deliver timely repairs. The transport system acts as the arteries of any economy in development, and the formation of potholes on roads can lead to injuries and the loss of lives. Recently, several countries have enabled pothole reporting platforms for their citizens, so that repair work data can be centralised and visible for everyone. Nevertheless, many of these platforms have been interrupted because of the rapid growth of requests made by users. Not only have these platforms failed to filter duplicate or fake reports, but they have also failed to classify their severity, albeit that this information would be key in prioritising repair work and improving the safety of roads. In this work, we aimed to develop a prioritisation system that combines deep learning models and traditional computer vision techniques to automate the analysis of road irregularities reported by citizens. The system consists of three main components. First, we propose a processing pipeline that segments road sections of repair requests with a UNet-based model that integrates a pretrained Resnet34 as the encoder. Second, we assessed the performance of two object detection architectures—EfficientDet and YOLOv5—in the task of road damage localisation and classification. Two public datasets, the Indian Driving Dataset (IDD) and the Road Damage Detection Dataset (RDD2020), were preprocessed and augmented to train and evaluate our segmentation and damage detection models. Third, we applied feature extraction and feature matching to find possible duplicated reports. The combination of these three approaches allowed us to cluster reports according to their location and severity using clustering techniques. The results showed that this approach is a promising direction for authorities to leverage limited road maintenance resources in an impactful and effective way.
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Andika, Rindi Sekar, and Ari Widayanti. "Analisis Kerusakan dan Perbaikan Jalan Beraspal pada Lapisan Asphalt Concrete-Wearing Course (AC-WC) di Kota Surabaya." Proceedings Series on Physical & Formal Sciences 1 (October 31, 2021): 163–70. http://dx.doi.org/10.30595/pspfs.v1i.149.
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AC-WC asphalt layer is a surface layer of flexible pavement construction that bears a direct load from the vehicle wheels. The increase in the number and load of traffic that occurs every year impacts road conditions and can cause damage. This requires analysis, repair and maintenance of roads for roads to function properly. The purpose of this study was to analyze road damage and provide alternative treatments for each road based on the type and level of damage that occurs. The method used was literature study, observation, documentation, and analysis with the PCI method. Observations were made on roads with class III flexible pavement in South Surabaya City. The results obtained were that the most dominant type of damage was crack damage, the level of road damage varies (low, medium, high severity) and there were different types of damage at the same point. The highest percentage and value of the damage were on Kembang Kuning Road and Pakis Tirtosari III Road. Based on the PCI method, the condition value of Dukuh Kupang XX Road was the lowest, at 25 (very poor). On Kembang Kuning Road and Pakis Tirtosari III Road maintenance work was needed, while Dukuh Kupang Road required road repairs.
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Mustonen, Jyri, Janne Lintilä, and Tauno Mäkiö. "Turning Deteriorated Paved Roads Back into Gravel Roads: Sheer Lunacy or Sustainable Maintenance Policy?" Transportation Research Record: Journal of the Transportation Research Board 1819, no. 1 (January 2003): 96–103. http://dx.doi.org/10.3141/1819a-15.
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In the late 1980s, many Finnish low-volume gravel roads were paved. This option was reasonable at that time because the price of bitumen was exceptionally low. No heavy structural rehabilitation was carried out on these roads before paving. It was assumed that these cheap and light pavements would last some 5 years. Now many of those roads have reached 10 to 15 years in age, still without any proper reconstruction, and are becoming increasingly deteriorated. For almost a decade now, the Finnish government has been reducing its spending on public roads. Maintenance and repair efforts have been concentrated on the main road network, and the minor network has deteriorated more and more. Calculations show that from the road agency’s point of view, upkeep of gravel roads is economically feasible compared with maintaining paved roads that are in poor condition. Therefore, road authorities have converted some of these paved low-volume roads back to gravel roads. In 2001, the Häme, Turku, and Uusimaa road districts agreed on common principles for these actions. Furthermore, they described minimum requirements for each case in which a paved road in poor condition was turned into a gravel road. Public opposition and political resistance were quite strong before these actions, since the gravel roads are seen as a decline of service level. People living along the road, however, generally admit that new gravel roads are more comfortable to drive on throughout the year than old deteriorated pavements. The road agency still has to focus on problems such as dust.
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Utami, Retno, Arbi Parianta Lukman, Yackob Astor, Atmy Verani R. Sihombing, Farhan Arradzumar G., and Yoshua Teofolus C.F.P. "Pavement maintenance strategy for Provincial roads in Tarakan City, North Kalimantan." E3S Web of Conferences 479 (2024): 07002. http://dx.doi.org/10.1051/e3sconf/202447907002.
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Tarakan City has several road segments on provincial roads that have experienced significant damage in the form of sinkholes and substantial potholes on the road surface. These deteriorations are primarily attributed to the impact of traffic, excessive traffic loads, subgrade soil conditions that fall short of requirements, and the use of pavement materials that do not meet the specified standards. To devise effective road repair plans, the collection of field data is crucial. Two distinct methods are employed for data collection to assess pavement conditions: the International Roughness Index (IRI) and the Surface Distress Index (SDI). The IRI method measures road roughness using the Rough meter III instrument, while the SDI method focuses on parameters like crack area, crack width, pothole count, and wheel path rut depth. The surveyed road sections encompass Amal Lama, Gunung Selatan, Aji Iskandar, Bhayangkara, Aki Pingka, and the Ring Road of Tarakan City. Research findings reveal the surface damage level of roads in Tarakan City using the SDI and IRI methods, with the following breakdown: roads in good condition account for 42.86%, those in moderate condition make up 51.90%, slightly damaged roads constitute 4.8%, and heavily damaged roads represent 0.44%. Additionally, the study has determined the percentage of each type of maintenance required: Routine Maintenance at 94.77%, Periodic Maintenance at 4.8%, and Reconstruction at 0.44%.
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Asmiatun, Siti. "Penerapan Metode K-Medoids Untuk Pengelompokkan Kondisi Jalan Di Kota Semarang." JATISI (Jurnal Teknik Informatika dan Sistem Informasi) 6, no. 2 (December 3, 2019): 171–80. http://dx.doi.org/10.35957/jatisi.v6i2.193.
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Road conditions in Indonesia specifically in the city of Semarang are more often damaged during the rainy season. If needed it will not be repaired users can increase fuel usage and vehicle maintenance until it passes through traffic safety. One of the solutions to these problems is to provide up-to-date information on the surface of the road so that the department can repair roads quickly. This study discusses the grouping of road data using the k-medoids method. Road condition data collection uses an accelerometer sensor that supports data according to mobile devices. From the data used, the number of 638 data was successfully grouped into 3 clusters which could indicate the level of frequency of roads that were good, lightly damaged and heavily damaged
Dissertations / Theses on the topic "Roads Maintenance and repair"
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Burger, A. F. (Adriaan Francois). "Scheduling algorithms for routine maintenance of roads in maintenance wards of a gravel road network." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50446.
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Thesis (MScEng)--University of Stellenbosch, 2005.ENGLISH ABSTRACT: The study reported in this thesis focuses on the development of algorithms that can be used to schedule routine maintenance work in maintenance wards of a gravel road network, This was undertaken as part of the development of the Blading Optimisation Module of the Gravel Management System of the Provincial Government: Western Cape. Two scheduling algorithms were developed and mapped to a pilot object model on the computer. The algorithms and application interface takes account of the constraints and variables of routine maintenance that were identified through interviews with personnel of the five District Municipalities contained in the Western Cape. The algorithms are tested and evaluated using the pilot application. Based on the evaluation of the algorithms conclusions are drawn and recommendations are made.
AFRIKAANSE OPSOMMING: Die studie beskryf in hierdie tesis fokus op die ontwikkeling van algoritmes vir die skedulering van roetine instandhoudingswerk in instandhoudingswyke van 'n gruispadnetwerk. Dit is ondemeem tydens die ontwikkeling van die "Blading Optimisation Module" van die "Gravel Management System" van die Provinsiale Regering: Wes Kaap. Twee algoritmes is ontwikkel en afgebeeld op 'n loods-objekmodel op die rekenaar. Die algoritmes en toepassingskoppelvlak maak voorsiening vir die beperkings en veranderlikes wat geidentifiseer is tydens onderhoude met personeel van die distrikmunisipaliteite in die Wes Kaap. Die algoritmes is getoets en geevalueer met behulp van die loodstoepassing. Gevolgtrekkings en aanbevelings word gemaak op grond van die resultate van die evaluasie van die algoritmes.
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Li, Yiu-man, and 李耀文. "MPA dissertation: an analysis of the policy on the control of road-opening works in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31965003.
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Tolliver, Denver D. "The impacts of grain subterminals on rural highways." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54799.
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The problems associated with increased heavy grain truck traffic in rural regions were investigated. Both the short-run incremental costs of accelerated pavement replacement and the long-run incremental costs of upgrading low-volume highways were considered. A set of demand and traffic models was formulated which projects the annual flow of grain from each production zone in an impact region to each elevator, allocates the flows among truck-types, computes the annual trips, gross vehicle weights and axle weights, and assigns the truck trips to the highway network. A set of highway models was also formulated which computes the equivalent single axle loads for each highway section in an impact region and estimates the incremental costs associated with subterminal traffic.
The impacts of a newly-formed subterminal-satellite elevator system in rural North Dakota were investigated. The results of the case study indicate that rural collector highways are likely to experience substantial localized impacts from subterminal development but the effects on principal arterials may be minimal. Altogether, $1.14 million in short-run costs and $8.41 million in long-run costs were projected for the impact region. However, the case study roads represent less than 2 percent of the rural arterial and collector highway mileage in the state. If the case-study network represents a microcosm of rural North Dakota, then the statewide short-run and long-run incremental costs may be in the vicinity of $57 million and $420 million respectively. However, regional variations within the state may result in either higher or lower costs for a given elevator system than those projected in the case study.Ph. D.
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Norris, Shaun Peter. "The adequacy of traffic control measures during road works." Thesis, Nelson Mandela Metropolitan University, 2016. http://hdl.handle.net/10948/11520.
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Workers have the right to a safe working environment. This right is encapsulated in the Bill of Rights (1996) wherein strong emphasis is placed on the right to a healthy and safe work environment. The construction industry has been labeled as dangerous owing to regular incidents, serious accidents, and fatalities. Road workers’ safety is at high risk in road construction areas, as they perform their work activities alongside moving vehicles that are often large and sometimes moving at high speed. It was determined that very few secondary sources provided information regarding the safety of South African road construction workers. Therefore, the knowledge obtained from this study contributes to the body of knowledge on the subject matter. To collect data, three descriptive surveys were conducted on two different road construction projects within the Eastern Cape. The survey participants included engineering consultants, contractors, traffic safety officers, general road construction workers, as well as random motorists driving through the work zone. Further data was collected from a speed measuring instrument placed in the work zone of the Port Elizabeth. The findings of this research report indicate that road users are not cognizant of the risk to workers in the work zone and that signage and advance warning signs alone are not sufficient to slow motorists’ speed. A further significant threat to road worker safety, is plant operator visibility. This study recommends that government and construction firms educate the public regarding the risks associated with speeding through a work zone. Construction firms should use electronic speed measuring devices prior to the work zone to make road users aware of their speed in relation to the speed limit. To limit plant related accidents, companies should install sensors or cameras on the rear and side panels of plant, so that plant operators have all round vision. Furthermore, road workers could be educated on the controlled use of their mobile phones to reduce the risks associated with the use of mobile phones inside work zones.
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Nicholls, Stephen John. "The effect of South African provincial road condition on the efficiency of forest product transport." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50146.
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Thesis (MScFor)--Stellenbosch University, 2004.ENGLISH ABSTRACT: The context of the study is concern over declining provincial road condition due to insufficient government funding of road maintenance. These roads are by their public nature used by a wide variety of commercial and private interests contributing a variety of axle loads. There was no information available on the use of these roads by forest companies and the road conditions. Consequently a survey was conducted to determine condition and length of each segment of provincial road in use by forestry companies and the volume of wood transported over them. In addition data was gathered on other users and their contribution to the volume transported over each section. The questionnaire indicated that the provincial roads are in a poor state. The literature review suggested a significant reduction in total cost of transport can be achieved by maintaining or rebuilding these roads. South African forest companies provide the majority of the heaviest axle loading to these roads and must theretore take responsibility tor damage caused to them. Also a variety of forest companies use the same roads and consequently collaborative studies between companies are needed. A modified Dijkstra's algorithm was used to quantify the effect of the condition of South African provincial roads on the efficiency of the transport ottorest products. The model requires digitised raster road and forest map layers combined with transport vehicle specification as input. The products of the model are optimum routes from all source points to a single exit point or sink, the total volume transported across all road nodes and the total cost to extract all wood from a map section. This output allows managers to identify critical roads tor management attention and make tentative estimates of possible reductions to total cost by altering the road condition. The manager is able to test the sensitivity of the solution to changes in variables and gain a better overall picture of the interactions within the system. The model results, and improved understanding, will provide input to more specific and collaborative studies. South African forest managers can respond to the poor provincial road network by conducting ad hue maintenance to these roads to prevent them becoming completely impassable or to rebuild them to their design state and maintain them at that state. The cost of taking no actions is that these roads would eventually become impassable. The road network model determined that, for the study area, a unilateral decision to rebuild and maintain all roads would result in a net increase in transport costs ofR 2 million/year. When compared to the cost of ad hue road improvements for the same area of R 8 million it is obvious that proper road management is a better option. It was shown that 75% of the reduction in total cost is generated by improving only 31 % of the provincial road surface. Consequently, by improving selected roads (20% of the total provincial road network for the area) it was possible to generate a net cost R 2.9 million lower than if the roads were left as they are. If reductions in operating costs are included the net cost to the forest industry is R 3.1 million/year lower than leaving the roads as they are. In addition to the cost being lower, an improved road network would be in place and the current ad hue spending would be unnecessary. On a larger scale it was estimated that poor provincial road management costs the industry as a whole R 26 million or R 1.52/m3/year. This money can be used to offset the costs of maintaining and upgrading roads. It is therefore concluded that the South African forest industry needs to assess its policy on provincial road management and become more active in the managing of these roads. The tool developed and presented is intended as a prototype decision support tool in developing future policies.
AFRIKAANSE OPSOMMING: Die inhoud van hierdie studie handelaar die verval van provinsiale paaie as gevolg van die regering se onvoldoende fondse vir die instandhouding van die paaie. Hierdie paaie word as gevolg van hulle publieke aard deur 'n wye verskeidenheid kommersiële en private belange gebruik, wat bydra tot 'n verskeidenheid van asladings. Daar was geen inligting oor die bosbou maatskappye se gebruik van paaie of die toestand van die paaie beskikbaar nie. Gevolglik is 'n opname gemaak 0111 die kondisie en lengte van elke segment van die paaie wat deur die bosbou maatskappye gebruik word, vas te stel, asook die volume hout wat oor die paaie vervoer word. Data oor ander verbruikers van die paaie is verder ingesamel, asook hul bydrae tot die volume wat oor die paaie vervoer word. Die vraelys het aangedui dat die provinsiale paaie in 'n baie swak toestand is. 'n Literatuurstudie het getoon dat 'n beduidende daling in die totale vervoerkoste moontlik is deur hierdie paaie te onderhou afoor te bou. Die Suid-Afrikaanse bosbou maatskappye voorsien die meerderheid van die swaarste asladings op hierdie paaie en moet dus verantwoordelikheid neem vir beskadigde paaie, 'n Verskeidenheid bosbou maatskappye gebruik die paaie; gevolglik is gesamentlike studies tussen die maatskappye ook nodig. 'n Aangepaste Dijkstra algoritme is gebruik om die effek van die toestand van Suid- Afrikaanse provinsiale paaie op die effektiwiteit van die vervoer van bosbou produkte, vas te stel. Hierdie model benodig digitale inligting oor die hoofen bosbou paaie, asook die spesifikasies van die voertuie wat gebruik word. Die resultaat van die model is die optimale roetes vanaf alle bronpunt oorspronge tot by 'n enkele bestemming, die totale volume vervoer oor al die padnodusse en die totale koste verbonde aan die verwydering van alle hout uit 'n afgemerkte seksie op die kaart. Hierdie produk of result ate stel bestuurders in staat 0111 kritieke paaie vir aandag te identitiseer en om tentatiewe voorspellings van moontlike afname in die totale kostes te maak indien die toestande van paaie verbeter sou word. Die bestuurder kan die sensitiwiteit van die oplossing vir variasie in die veranderlikes toets en sodoende 'n beter geheelbeeld kry van die interaksie binne die sisteem. Die resultate van die model en n beter begrip daarvan, kan insterte lewer in meer spesitieke studies en gesamentlike studies tussen maatskappye. Suid Afrikaanse bosbou bestuurders kan teen die swak provinsiale padnetwerk optree deur ad hoc instandhouding toe te pas op hierdie paaie om te voorkom dat hulle totaal en alonbegaanbaar word. Ofhulle kan die paaie restoureer tot hul oorspronklike toestand en hulle dan in stand hou. Die kostes daaraan verbonde om nie op te tree nie, is dat hierdie paaie uiteindelik on-gaanbaar sal word. Die padnetwerkmodel het gewys dat vir die spesitieke studie area, 'n eenparige besluit 0111 alle paaie te herbou en onderhou, 'n algehele toename in vervoerkostes van R2 miljoen/jaar tot gevolg sal hê. Wanneer dit vergelyk word met die R8 miljoen wat die ad hoc padverbeterings kos, is dit duidelik dat geskikte padbestuur 'n beter opsie is. Daar is bewys dat 75% van die daling in totale kostes genereer kan word deur verbeteringe aan die oppervlaktes van slegs 31% van die provinsiale paaie te maak. Gevolglik was dit moontlik om netto kostes van R2,9 miljoen ruinder te genereer as vanneer geen instandhouding gedoen is nie. Dit is bewerkstellig deur verbeteringe aan geselekteerde paaie aante bring (20% van die totale provinsiale padnetwerk vir die area.) As die daling in bedryfskoste ingesluit is, sal die netto koste vir die bedryf R3.1 millioen/jaar ruinder wees as om die paaie so te los sonder enige aandag. Verder, tot laer koste sal daar 'n verbeterde pad netwerk in plek wees en die huidige ad hoc spandeering aan die paaie nie meer nodig wees nie. Op groot skaal, is die benaderd voorspelling dat 'n swak provinsialepadbestuurstelsel die bosbou bedryf R26 millioen of R 1.52/m3 uit die sakjaag. Hiedie misbruikde geld kan eerder teruggeploeg word in pad onderhoud en opgradeerings werksaamhede. Dit is dus nodig dat die bosbou bedryf sy beleid weer in oonskou moet neem in verband met die bestuur van provinsiale paaie en ook meer aktief die voortou sal moet neem in die instandhoudind van provinsiale paaie. Die metodiek hier ontwikkel kan 'n inleidende doel dien in die ontwikkeling van toekoemstige besluit neeming rakend die bestuur van provinsiale paaie.
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BONKAT, BARNABAS NANPAK. "ANALYTICAL PROCEDURE FOR EVALUATING ROADWAY UPGRADING STRATEGY FOR LOW-VOLUME HIGHWAYS." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187926.
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The purpose of this research was to develop a simplified analytical procedure for determining the optimal timing for upgrading low-volume roads in developing countries. Most roadway upgradings from gravel to surface treated and to asphaltic concrete are carried out when total transport cost on a road becomes high as a result of high traffic and the consequent rapid deterioration of the roadway. Adequate timing of upgrading strategies ensures effective use of resources and lower total transport cost. This study examined existing systems, models, and approaches for estimating total transport cost components. An analytical procedure was then developed using a decision-tree concept to delineate all possible upgrading strategies within a plan period. The decision-tree concept depicts all the possible upgrading strategies within a plan period with decisions on roadway upgrading made at certain decision intervals. The total transport cost of the upgrading strategies is evaluated to establish the optimal strategies and traffic warrants for improving a roadway surface. A computer program PVMNT was written to facilitate the computation of the total transport cost. A case study was presented to demonstrate the application of the analytical procedure. The case study revealed interesting results on the changes of optimal upgrading strategies with changes in base traffic volume and growth rate. However, general conclusions could not be drawn based on the results of the case study. These results, as well as the analytical procedure, should be of interest to engineers responsible for providing low-volume roads in developing countries.
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Karim, Hawzheen. "Improved Road Design for Future Maintenance - Analysis of Road Barrier Repair Costs." Licentiate thesis, Stockholm : Division of Highway Engineering, Royal Institute of Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9260.
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司徒雪雯 and Suet-man Helen Szeto. "Outsourcing of contract management and works supervision of road network maintenance in Highways Department." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31966998.
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Supawiwat, Nutthapon. "A study on road slope management system considering maintenance and repair strategy." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/144540.
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Kyoto University (京都大学)0048
新制・課程博士
博士(工学)
甲第11867号
工博第2560号
新制||工||1358(附属図書館)
23647
UT51-2005-N701
京都大学大学院工学研究科土木システム工学専攻
(主査)教授 大西 有三, 教授 大津 宏康, 教授 中北 英一
学位規則第4条第1項該当
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Karim, Hawzheen. "Road Design for Future Maintenance : Life-cycle Cost Analyses for Road Barriers." Doctoral thesis, Högskolan Dalarna, Vägteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:du-5474.
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The cost of a road construction over its service life is a function of design, quality of construction as well as maintenance strategies and operations. An optimal life-cycle cost for a road requires evaluations of the above mentioned components. Unfortunately, road designers often neglect a very important aspect, namely, the possibility to perform future maintenance activities. Focus is mainly directed towards other aspects such as investment costs, traffic safety, aesthetic appearance, regional development and environmental effects. This doctoral thesis presents the results of a research project aimed to increase consideration of road maintenance aspects in the planning and design process. The following subgoals were established: Identify the obstacles that prevent adequate consideration of future maintenance during the road planning and design process; and Examine optimisation of life-cycle costs as an approach towards increased efficiency during the road planning and design process. The research project started with a literature review aimed at evaluating the extent to which maintenance aspects are considered during road planning and design as an improvement potential for maintenance efficiency. Efforts made by road authorities to increase efficiency, especially maintenance efficiency, were evaluated. The results indicated that all the evaluated efforts had one thing in common, namely ignorance of the interrelationship between geometrical road design and maintenance as an effective tool to increase maintenance efficiency. Focus has mainly been on improving operating practises and maintenance procedures. This fact might also explain why some efforts to increase maintenance efficiency have been less successful. An investigation was conducted to identify the problems and difficulties, which obstruct due consideration of maintainability during the road planning and design process. A method called “Change Analysis” was used to analyse data collected during interviews with experts in road design and maintenance. The study indicated a complex combination of problems which result in inadequate consideration of maintenance aspects when planning and designing roads. The identified problems were classified into six categories: insufficient consulting, insufficient knowledge, regulations and specifications without consideration of maintenance aspects, insufficient planning and design activities, inadequate organisation and demands from other authorities. Several urgent needs for changes to eliminate these problems were identified. One of the problems identified in the above mentioned study as an obstacle for due consideration of maintenance aspects during road design was the absence of a model for calculating life-cycle costs for roads. Because of this lack of knowledge, the research project focused on implementing a new approach for calculating and analysing life-cycle costs for roads with emphasis on the relationship between road design and road maintainability. Road barriers were chosen as an example. The ambition is to develop this approach to cover other road components at a later stage. A study was conducted to quantify repair rates for barriers and associated repair costs as one of the major maintenance costs for road barriers. A method called “Case Study Research Method” was used to analyse the effect of several factors on barrier repairs costs, such as barrier type, road type, posted speed and seasonal effect. The analyses were based on documented data associated with 1625 repairs conducted in four different geographical regions in Sweden during 2006. A model for calculation of average repair costs per vehicle kilometres was created. Significant differences in the barrier repair costs were found between the studied barrier types. In another study, the injuries associated with road barrier collisions and the corresponding influencing factors were analysed. The analyses in this study were based on documented data from actual barrier collisions between 2005 and 2008 in Sweden. The result was used to calculate the cost for injuries associated with barrier collisions as a part of the socio-economic cost for road barriers. The results showed significant differences in the number of injuries associated with collisions with different barrier types. To calculate and analyse life-cycle costs for road barriers a new approach was developed based on a method called “Activity-based Life-cycle Costing”. By modelling uncertainties, the presented approach gives a possibility to identify and analyse factors crucial for optimising life-cycle costs. The study showed a great potential to increase road maintenance efficiency through road design. It also showed that road components with low investment costs might not be the best choice when including maintenance and socio-economic aspects. The difficulties and problems faced during the collection of data for calculating life-cycle costs for road barriers indicated a great need for improving current data collecting and archiving procedures. The research focused on Swedish road planning and design. However, the conclusions can be applied to other Nordic countries, where weather conditions and road design practices are similar. The general methodological approaches used in this research project may be applied also to other studies.
Books on the topic "Roads Maintenance and repair"
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Newman, Robert B. Maintenance contracting. Washington, D.C: Transportation Research Board, National Research Council, 1991.
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Skorseth, Ken. Gravel roads: Maintenance and design manual. [Brookings, SD: South Dakota Local Transportation Assistance Program (Box 2220, Harding Hall, Brookings, 57007-0199), 2005.
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Skorseth, Ken. Gravel roads: Maintenance and design manual. [Washington, D.C.?]: U.S. Dept. of Transportation, Federal Highway Administration, 2000.
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Skorseth, Ken. Gravel roads: Maintenance and design manual. [Brookings, SD: South Dakota Local Transportation Assistance Program (Box 2220, Harding Hall, Brookings, 57007-0199), 2000.
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Board, Transportation Research, ed. Systematic approach to maintenance. Washington: National Research council, 1989.
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United States. Federal Highway Administration. Gravel roads: Construction & maintenance guide. Washington, D.C.]: U.S. Department of Transportation, Federal Highway Administration, 2015.
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Transport, Great Britain Department of. National roads England 1985. (London): (Department of Transport), 1985.
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Southern Africa Transport and Communications Commission. Group of Experts on Road Infrastructure. and Carl Bro gruppen, rådgivende ingeniør- og planlægningsfirmaer., eds. Road maintenance in member countries. [Glostrup, Denmark]: Carl Bro International A/S Consulting Engineers & Planners, 1986.
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Western Australia. Main Roads Dept. Road maintenance performance standards. [Perth?]: The Department, 1991.
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Ken, Atkinson, ed. Highway maintenance handbook. 2nd ed. London: Thomas Telford, 1997.
Find full textBook chapters on the topic "Roads Maintenance and repair"
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Roger J., Thompson, Peroni Rodrigo, and Visser Alex T. "Road management and maintenance." In Mining Haul Roads, 187–232. Leiden, The Netherlands : CRC Press/Balkema, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429491474-5.
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Dangel, Rainer. "Maintenance and Repair." In Injection Moulds for Beginners, 263–67. München: Carl Hanser Verlag GmbH & Co. KG, 2016. http://dx.doi.org/10.3139/9781569906323.008.
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Dangel, Rainer. "Maintenance and Repair." In Injection Molds for Beginners, 267–71. München: Carl Hanser Verlag GmbH & Co. KG, 2020. http://dx.doi.org/10.3139/9781569908198.008.
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Dangel, Rainer. "Maintenance and Repair." In Injection Molds for Beginners, 267–71. München, Germany: Carl Hanser Verlag GmbH & Co. KG, 2020. http://dx.doi.org/10.1007/978-1-56990-819-8_8.
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Son, Lee How, and George C. S. Yuen. "Repair of Concrete Structures." In Building Maintenance Technology, 124–56. London: Macmillan Education UK, 1993. http://dx.doi.org/10.1007/978-1-349-23150-8_7.
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Tricker, Ray. "Installation, maintenance and repair." In Wiring Regulations in Brief, 436–63. Fourth edition. | Abingdon, Oxon ; New York : Routledge, 2021.: Routledge, 2020. http://dx.doi.org/10.1201/9781003001829-9.
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Gaythwaite, John W. "Rehabilitation, Maintenance, and Repair." In Design of Marine Facilities, 593–644. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784414309.ch11.
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Tricker, Ray. "Installation, maintenance and repair." In Wiring Regulations Pocket Book, 370–91. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003165170-9.
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Crow. "Construction, Maintenance and Repair." In Jetties and Wharfs, 199–228. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003176916-8.
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Cadena, Richard. "Maintenance, Troubleshooting, and Repair." In Automated Lighting, 357–79. Third edition. | New York, NY : Routledge, 2017.: Routledge, 2017. http://dx.doi.org/10.4324/9781315724492-17.
Full textConference papers on the topic "Roads Maintenance and repair"
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Byzyka, Juliana, Mujib Rahman, and Denis Albert Chamberlain. "Thermal Segregation of Asphalt Material in Road Repair." In Eighth International Conference on Maintenance and Rehabilitation of Pavements. Singapore: Research Publishing Services, 2016. http://dx.doi.org/10.3850/978-981-11-0449-7-117-cd.
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Al-Ansari, Jamal Essa M., Khaled E. Hassan, Kempaiah Kantha Kumar, and Khaled N. Helali. "Development and Implementation of Ashghal Guidelines for the Evaluation and Repair of Sinkholes." In The 2nd International Conference on Civil Infrastructure and Construction. Qatar University Press, 2023. http://dx.doi.org/10.29117/cic.2023.0072.
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Sinkholes are a common and recurring problem with potential safety risks to road users and authorities. A sinkhole is a void in the ground caused by natural and/or manmade activities, and mainly associated with carbonate rocks and underground water movement. It occurs suddenly and manifests as a hole in the ground, with the potential to cause significant problems of road closure and interruption to road users and construction activities. With the vast infrastructure, development over the last two decades and the majority of soil formation of Qatar exposes limestone and dolomites, the number of reported sinkholes has increased dramatically. This paper presents the development and implementation of new guidelines for the evaluation and repair of sinkholes for the Roads Operation and Maintenance Department (ROMD) at the Public Works Authority (Ashghal). It reviews the methodology adopted for the classification of sinkholes, application of Ground Penetrating Radar (GPR) technique for the early detection of subsurface voids and sinkholes before they become major problems. It also covers the approach adopted by ROMD and its Framework Partners for the repair of sinkholes. A case study is presented on the implementation of the new guidelines for the effective evaluation and repair of sinkholes, with performance monitoring in service. Successful implementation of the new guidelines contributes to enhanced management of road network in Qatar by maximizing asset performance and minimizing accidents and service disruption.
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Ahuja, Anil K., Sanjay Pande, Vivek Gangwar, Yogesh Sharma, and Anubhav Dahiya. "A Study of Indian Power Plant MRO (Maintenance Repair Overhaul) Industry." In ASME 2008 Power Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/power2008-60023.
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Indian power sector has made significant progress despite legacy industry constraints. The current installed capacity is 140,000 MW and is growing at about 10% annually. The capacity utilization is beyond known benchmarks i.e. national average is over 78% and while NTPC over 92%. Traditional Indian MRO strategy is based on strategic improvisations to obtain the best out of prevailing industry and restricted maintenance windows. Power plant MRO in India faces issues of service and quality response. It presents an area which has scope for systemic improvements. The subject is also important due to linkage to energy efficiency improvement potentials which are central to global climate initiatives. “MRO Study Project” was undertaken by NTPC (along with Frost & Sullivan) with participation of other Indian generating companies to create a holistic industry view to accurately directionalize the improvement efforts. Power plant MRO is a weakly documented subject in India whereas for industrial countries it’s an almost settled issue. The project — which targeted creation of insights into power station and vendor side — therefore called for significant primary research. Teams visited most of the 36 participating Indian power stations and interviewed 40 MRO vendors (out of 200 participants). For best practice reference creation, visits were made to 7 power stations in Germany while information was also gathered from USA, South Africa and China. The project deliverables include a project report and certain data base considered useful to the industry. Indian power plant MRO has evolved around capacity utilization as the centre. The processes are man power intensive characterized by 1000 very small vendors who work for some 140 thermal stations. Survey indicated service and quality issues as well as inadequate technical back up of vendors which is compensated by plant personnel supervision. New objectives of efficiency improvement and costs reduction call for fundamental changes in areas of tooling, craft skill sets and procedures. MRO Destination envisions emergence of new industry components other than workforce providers — maintenance companies, maintenance schools, certification companies etc. The road map for change recommends three key focus areas: tariff structure which incentivizes efficiency improvement through MRO, best practice infusion to the MRO business and contracting processes improvements of power stations. Involvement of international vendors is expected to provide the best practice exposure as well as catalyze changes in the internal systems. Industry level initiative is recommended by creating a platform for accelerating change and cost effectiveness. The paper presents the project process, key data/analysis, salient findings and business opportunities. For India and many developing countries with similar focus, the work could be useful as it provides a structured platform for internal diagnostics on MRO as well as provides the prospective partners (international utilities and MRO service providers) with Indian MRO business nuances and opportunities to better plan possible business tie ups.
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Hesselink, Bert, Wim Freriks, Mark van der Burg, and John van Dijk. "BridgeDoctor, life cycle costs of bridges under control." In IABSE Congress, Christchurch 2021: Resilient technologies for sustainable infrastructure. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/christchurch.2021.0663.
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<p>The Netherlands is a densely-populated country, with many rivers and roads. As a result, there are many intersections between roads and waterways, and these intersections are heavily used. Movares is a Dutch engineering consultancy and we can draw on over 100 years’ experience with a wide range of bridges and viaducts. We are among the Netherlands’ leading consultants in the field of movable bridges. Our knowledge and experience put us in a perfect position to look after bridges from initial design through to end of service life.</p><p>Many Dutch bridges – both movable and fixed – were built in the 1950s and 1960s, and were not designed for today’s increased, heavier traffic. They are showing symptoms of fatigue and/or no longer conform (demonstrably) to current requirements. As a result, they need to be replaced. The availability of infrastructure is of great economic importance</p><p>At the same time, safety must be guaranteed. Our philosophy: “If it ain’t broke, don’t fix it!” Our ap-proach – the BridgeDoctor® – allows us to establish the condition of a bridge with the aid of a rapid analysis. In many cases, we can use smart measures to extend the life of a bridge, allowing it to remain in service for several more decades.</p><p>By an inventory based on available information. The aim is to gain insight into the status of the bridges now, but also in the future. On this basis it is possible to predict when the bridge needs to be replaced or, and of course, how and when to intervene constructively. This inventory provides quick answers to questions such as: which bridge is constructively safe and which bridge should be tackled first?</p><p>Maintenance also prevents emergency repairs and saves a lot of money (emergency repair = costly and timely maintenance can lead to less maintenance.</p>
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Vorobjovas, Viktoras, Algirdas Motiejunas, Tomas Ratkevicius, Alvydas Zagorskis, and Vaidotas Danila. "Analysis of Calculation Methods for Life Cycle Greenhouse Gas Emissions for Road Sector." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.156.
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Climate change is one of the main nowadays problem in the world. The politics and strategies for climate change and tools for reduction of greenhouse gas (GHG) emissions and green technologies are created and implemented. Mainly it is focused on energy, transport and construction sectors, which are related and plays a significant role in the roads life cycle. Most of the carbon footprint emissions are generated by transport. The remaining emissions are generated during the road life cycle. Therefore, European and other countries use methods to calculate GHG emissions and evaluate the impact of road construction methods and technologies on the environment. Software tools for calculation GHG emissions are complicated, and it is not entirely clear what GHG emission amounts generate during different stages of road life cycle. Thus, the precision of the obtained results are often dependent on the sources and quantities of data, assumptions, and hypothesis. The use of more accurate and efficient calculation-evaluation methods could let to determine in which stages of road life cycle the largest carbon footprint emissions are generated, what advanced road construction methods and technologies could be used. Also, the road service life could be extended, the consumption of raw materials, repair, and maintenance costs could be reduced. Therefore the time-savings could be improved, and the impact on the environment could be reduced using these GHG calculation-evaluation methods.
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Stewart, Monique, Hamed Pouryousef, Brian Marquis, Som P. Singh, and Demet Cakdi. "Receiver Operating Characteristic (ROC) Analysis on the Wheel Impact Load Detector System of Metro-North Railroad." In 2018 Joint Rail Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/jrc2018-6202.
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The Federal Railroad Administration (FRA) has partnered with Metro-North Railroad (MNR), Long Island Rail Road (LIRR) and New York & Atlantic Railway (NYA) to enhance operational safety through the implementation of wayside detection systems. Currently, MNR has a four-track Wheel Impact Load Detector (WILD) system that has been operating since 2010 near the Grand Central Terminal. This paper discusses a Receiver Operating Characteristic (ROC) analysis of this existing WILD system in conjunction with the wheel maintenance practices since 2010. Currently MNR’s operating procedures require a car with wheel(s) exhibiting a vertical peak load/mean load ratio, called dynamic ratio (DR), ≥3.0 to be shopped for repair. The analysis, using a 30-day repair window after detection, shows that 84% of the cars shopped for wheel(s) with DR≥3.0 required valid maintenance repairs. The minimum number of total false records (false positive + false negative records, combined) were observed within the DR range of 2.7–2.8 when considering wheel flat defects only. An analysis of the false negative records inclusive of both flat and shell spots, showed that the minimum number of false records dropped slightly to a DR range of 2.6–2.7. The reported ROC analysis shows that MNR’s current DR≥3.0 to trigger inspection and maintenance actions is reasonable.
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Gunasekaran, Abirami Krishnan, and Vairamani Raju. "Flowlines Identification Using Cathodic Protection for Repair Activities." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/210887-ms.
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Abstract In ADNOC Onshore, during regular business operations, there are needs to maintain/replace/repair flow lines due to variety of reasons Rerouting of flow lines.Replacing flow lines due to excessive thinning of flow line due to corrosion.Third party damage.Replacing a section of flow line due to a leak However, correctly identifying the flowline for maintenance / repair in the Fields is challenging because the target flowline is Same size and identical,Inaccessible due to sand dunes/under road crossing and isAmongst cluster of flowlines with no markersIn the same right of way Time and time again, it has been noticed that the flow lines get intertwined like spaghetti. A typical scenario is provided in Figure -1. Therefore, it is very difficult to identify flow lines from one side of sand due to the other side.
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Posmetev, Valeriy, Vadim Nikonov, and Viktor Posmetev. "COMPUTER MODELING OF THE WORKING PROCESS OF A FOREST TRUCK EQUIPPED WITH HYDROPNEUMATIC SUSPENSIONS OF MODULAR TYPE." In Modern machines, equipment and IT solutions for industrial complex: theory and practice. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2021. http://dx.doi.org/10.34220/mmeitsic2021_113-118.
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The influence of the constructive perfection of suspensions on the efficiency of the functioning of a logging vehicle in the process of hauling timber along insufficiently equipped logging roads has been substantiated. The current direction of improving the suspension of timber trucks, which allows to reduce fuel consumption, the cost of maintenance and repair, and, consequently, reduce the final cost of exported timber, is considered. A perspective scheme of a pneumohydraulic suspension of a modular type, applied to a timber truck, is proposed. On the basis of computer modeling, a preliminary assessment of the effectiveness of the functioning of the proposed pneumohydraulic suspension installed on a logging vehicle during its movement in the process of hauling timber along an insufficiently equipped logging road has been carried out. The main factors that have a significant impact on the operation of a pneumohydraulic suspension of a modular type are described. The dependences of the change in the maximum values of the vertical acceleration of the timber truck, the pressure in the gas cavity of the pneumohydraulic cylinder, the temperature difference on the average height of irregularities, the number of obstacles per unit length of the timber road and the speed of the timber truck are obtained. The numerical values of the main factors influencing the functioning of the proposed suspension are revealed, which provide the best effect when a timber truck is moving along an insufficiently equipped timber road.
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Mazzeo, Joseph M., and Jeromy New. "Maintenance Practices to Manage Corrosion Under Insulation (CUI) of Outdoor Piping Systems in Power Plants." In ASME 2015 Power Conference collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/power2015-49606.
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The outer walls of insulated pipes are susceptible to corrosion if the insulation stays wet for long periods of time. Corroded pipes have the potential for bursting without warning, releasing steam or combustibles and insulation debris which may contain asbestos, requiring significant cleanup and repairs. Managing the associated risks requires the consideration of a number of factors such as corrosion rates, examination methods, prioritization of inspection locations, and fitness for service evaluation and repair methods. A number of factors affect the corrosion rate such as pipe material and geometry, proximity to saltwater environments, local weather, and prevailing wind directions, as well as insulation type and condition. Some locations on the piping system require additional scrutiny, such as at pipe supports where rain water can cascade down hanger rods and into openings in the insulation, and at the bottom of vertical pipe runs where moisture is prone to becoming trapped in the insulation cladding. To prioritize inspection locations, risk factors such as exposure of personnel, the potential amount of energy released, the postulated corrosion rate and failure potential based on pressure and temperature need to be taken into account. The most susceptible materials are carbon and low alloy steel. Pressurized dead leg small bore pipes are of concern due to the small wall thickness and low operating temperatures that do not provide an opportunity to dry out the insulation. Digital Radiography Testing (DRT) through insulation provides excellent results for most 6” or less diameter piping systems. Highly sensitive digital exposure plates require less radiation compared to conventional Radiography, resulting in small radiation safety zones that allow work in surrounding areas to continue during inspection. The technique is effective for the evaluation of corroding fillet welds and threaded connections, and provides a digitized image that is database friendly. It provides information on pipe diameter and schedule, which aids in the preparation of repair sketches and bill of materials before an outage occurs. Repair options include replacement and operational changes which allow abandonment as well as improvements or elimination of insulation. Corrosion Under Insulation (CUI) damage is a significant issue at some plant sites where limited run time doesn’t allow the insulation to dry. In the near future, older, less economic base loaded plants that will run less frequently may fall into this category. To evaluate risk, the probability of failure needs to be considered with its potential consequence. For a pipe with CUI damage, probability of failure is dependent on the corrosion rate, pressure, pipe diameter, and thickness. The consequences are a potential injury and lost production.
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Fetzner, Dave, Nate Ames, and Greg Ruschau. "Investigation of Duplex Stainless Steels for Pipeline Repairs." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2233.
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Hundreds of miles of production pipelines make up the network at the Prudhoe Bay oilfield in Northern Alaska, part of the vast petroleum reserves which feed one million barrels of crude oil per day to the 800-mile Trans Alaska Pipeline System. Part of the inevitable layout on a land-based pipeline of this size is the need to cross roads and undergo similar directional changes. When the pipeline was constructed this hurdle was overcome by burying the pipe for short sections. At present the system has hundreds of buried road crossings. One of the continued high-cost maintenance issues with the pipeline is the corrosion that occurs at the elbows used for direction and elevation changes. The pipelines are constructed primarily out of high tensile strength carbon steels. While carbon steel is sufficient for most of the pipeline, the elbows present new challenges such as the cumulative effects of erosion and pitting corrosion. One proposed solution was to replace the carbon steel with duplex stainless steel in these areas of higher susceptibility. Duplex stainless steel has a high general corrosion resistance and better velocity-assisted corrosion resistance than carbon steel. Coupled with its recent decrease in cost, this solution makes the use of duplex stainless steel a potential candidate for the above application, reducing costs of the repair and inspection for the entire pipeline. Technical issues which are significant in joining carbon steel to duplex stainless steel include the proper selection of the weld metal alloy, weld cooling rates, and corrosion of the carbon steel due to the joining of dissimilar alloys. This paper addresses these issues of welding and corrosion that were investigated for the use of duplex pipe and components in the carbon steel system.
Reports on the topic "Roads Maintenance and repair"
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Agrawal, Asha Weinstein, Hilary Nixon, and Cameron Simmons. Investing in California’s Transportation Future: Public Opinion on Critical Needs. Mineta Transportation Institute, December 2020. http://dx.doi.org/10.31979/mti.2020.1861.
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In 2017, the State of California adopted landmark legislation to increase the funds available for transportation in the state: Senate Bill 1 (SB1), the Road Repair and Accountability Act of 2017. Through a combination of higher gas and diesel motor fuel taxes, SB1 raises revenue for four critical transportation needs in the state: road maintenance and rehabilitation, relief from congestion, improvements to trade corridors, and improving transit and rail services. To help state leaders identify the most important projects and programs to fund within those four topical areas, we conducted an online survey that asked a sample of 3,574 adult Californians their thoughts on how the state can achieve the SB1 objectives. The survey was administered from April to August 2019 with a survey platform and panel of respondents managed by Qualtrics. Quota sampling ensured that the final sample closely reflects California adults in terms of key socio-demographic characteristics and geographic distribution. Key findings included very strong support for improving all transportation modes, reducing air pollution and greenhouse gas emissions from transportation, and more convenient options to travel without driving. Respondents placed particular value on better maintenance for both local streets and roads, as well as highways. Finally, the majority of respondents assessed all types of transportation infrastructure in their communities as somewhat or very good.
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Mahlberg, Justin, Yaguang Zhang, Sneha Jha, Jijo K. Mathew, Howell Li, Jairaj Desai, Woosung Kim, et al. Development of an Intelligent Snowplow Truck that Integrates Telematics Technology, Roadway Sensors, and Connected Vehicle. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317355.
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The Indiana Department of Transportation (INDOT) manages and maintains over 28,000 miles of roadways. Maintenance of the roadways includes pavement repair in the summer as well as snow removal and de-icing in the winter. The prioritization of assets during winter storm events is crucial and impacts travel and safety. The objective of this project was to identify and develop tools INDOT could provide its operators to effectively perform winter operation de-icing activities. This project examined application methods and data to provide analytics and make data-driven decisions for state-wide deployment and operations. Discovery of calibration metrics partnered with fleetwide telematics enabled the development of analytic dashboards that allowed real-time evaluations and adjustments to be made during winter operation activities. These tools will allow the agency to better treat and enhance safety for road users.
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Collins, J. L., K. Fytas, and R. K. Singhal. Design, construction and maintenance of surface mine haulage roads. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/304971.
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Hamre, Andrea, Jonathan Fisher, and David Kack. Public Willingness to Raise Transportation Revenues, Priorities for Transportation Spending, and Preferences for Types of Transportation Revenues: Evidence from Montana’s Billings and Missoula Small Urban Areas. Montana State University, July 2023. http://dx.doi.org/10.15788/1700173900.
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This project analyzed public willingness to raise transportation revenues, public priorities for transportation spending, and public preferences for transportation revenue types using recent household travel surveys for the small urban areas of Billings and Missoula. The share of the public willing to pay more taxes or fees for transportation improvements was 44% in Billings and 36% in Missoula (including neutral or undecided responses). This level of public support for increased transportation revenues is perhaps higher than generally perceived by leaders reluctant to publicly support a gas tax increase. Our results regarding transportation spending priorities are consistent with the prioritization of preserving existing transportation assets. Maintenance and repair of existing infrastructure received the most support of transportation spending options in both the Billings and Missoula survey samples. Our results regarding the preferred type of transportation revenue mechanism (available only for Missoula) suggested that a plurality of the sample (35% including neutral or undecided responses) preferred a $0.02 per gallon increase in fuel taxes to other options (such as an increase in sales or property taxes). Together, our results suggest a public willingness to more adequately fund transportation investments, a preference for spending on existing transportation assets, and a preference for more direct road user charges over less direct alternatives.
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Henderson, Steven J., and Steven K. Feiner. Augmented Reality for Maintenance and Repair (ARMAR). Fort Belvoir, VA: Defense Technical Information Center, August 2007. http://dx.doi.org/10.21236/ada475554.
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Borden, Lance. B-1B Wing Shear Bearing Maintenance Repair (SD11). Fort Belvoir, VA: Defense Technical Information Center, August 2004. http://dx.doi.org/10.21236/ada426342.
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Borden, Lance. B-1B Wing Shear Bearing Maintenance Repair (SD11). Fort Belvoir, VA: Defense Technical Information Center, November 2004. http://dx.doi.org/10.21236/ada427948.
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O'Neil, Edward F. Repair and Maintenance of Masonry Structures: Case Histories. Fort Belvoir, VA: Defense Technical Information Center, March 1995. http://dx.doi.org/10.21236/ada294186.
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Borden, Lance. B-1B Wing Shear Bearing Maintenance Repair (SD11). Fort Belvoir, VA: Defense Technical Information Center, April 2004. http://dx.doi.org/10.21236/ada421857.
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Jackson, Sarah, and Jason Church. Fort Leonard Wood German POW stonework : maintenance and repair. Construction Engineering Research Laboratory (U.S.), August 2017. http://dx.doi.org/10.21079/11681/22790.
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