Download or read book Evaluating the Design and Effectiveness of Subsurface Drainage Layers written by Bobby W. Meade and published by . This book was released on 1994 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nationally Coordinated Program of Highway Research Development and Technology Annual Progress Report Fiscal Year 1994 written by and published by . This book was released on 1995 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Subdrainage Design written by Lyle K. Moulton and published by . This book was released on 1980 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluating Roadway Subsurface Drainage Practices written by Dario J. Canelon and published by . This book was released on 2009 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project involved the evaluation of some configurations of pavement subsurface drainage systems, including the conventional edgedrain system, and two centerline configurations, at 2-foot and 4-foot depths. Testing of these configurations took place on a newly constructed eight-mile section of Nobles County CSAH 35 near Worthington. Drained roadway sections were 500 feet long for each drainage treatment. Each of the treatments was replicated six times, with the outflow for each replication outlet through a tipping-bucket flow monitoring system. The experimental design tested both the drain configuration and the effect of relative elevation of the roadway. Measurement of relative wetness of the pavement base and subgrade materials for each of the drainage treatments was conducted with a Geonics electromagnetic induction instrument (EM38). Data were collected from March 2006 until November 2008, with breaks during the winter periods. Statistical analyses were conducted to look for treatment effects, using both drained volumes as well as the EM38 measurements as measures of drain efficacy. Additional project work included a finite element analysis of the drainage configurations, EM38 evaluation of drainage effectiveness of an open-graded base construction for streets in the city of Worthington, and evaluation of the potential drain plugging effect of crushed concrete fill.
Download or read book Evaluating Roadway Subsurface Drainage Practices written by Halil Ceylan and published by . This book was released on 2013 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bearing capacity and service life of a pavement is affected adversely by the presence of undrained water in the pavement layers. In cold winter climates like in Iowa, this problem is magnified further by the risk of frost damage when water is present. Therefore, well-performing subsurface drainage systems form an important aspect of pavement design by the Iowa Department of Transportation (DOT). However, controversial findings are also reported in the literature regarding the benefits of subsurface drainage. The goal of this research was not to investigate whether subdrains are needed in Iowa pavements, but to conduct an extensive performance review of primary interstate pavement subdrains in Iowa, determine the cause of the problem if there are drains that are not functioning properly, and investigate the effect of poor subdrain performance due to improper design, construction, and maintenance on pavement surface distresses, if any. An extensive literature review was performed covering national-level and state-level research studies mainly focusing on the effects of subsurface drainage on performance of asphalt and concrete pavements. Several studies concerning the effects of a recycled Portland cement concrete (RPCC) subbase on PCC pavement drainage systems were also reviewed. A detailed forensic test plan was developed in consultation with the project technical advisory committee (TAC) for inspecting and evaluating the Iowa pavement subdrains. Field investigations were conducted on 64 selected (jointed plain concrete pavement/JPCP and hot-mix asphalt/HMA) pavement sites during the fall season of 2012 and were mainly focused on the drainage outlet conditions. Statistical analysis was conducted on the compiled data from field investigations to further investigate the effect of drainage on pavement performance. Most Iowa subsurface drainage system outlet blockage is due to tufa, sediment, and soil. Although higher blockage rates reduce the flow rate of water inside outlet pipes, it does not always stop water flowing from inside the outlet pipe to outside the outlet pipe unless the outlet is completely blocked. Few pavement surface distresses were observed near blocked subsurface drainage outlet spots. More shoulder distresses (shoulder drop or cracking) were observed near blocked drainage outlet spots compared to open ones. Both field observations and limited performance analysis indicate that drainage outlet conditions do not have a significant effect on pavement performance. The use of RPCC subbase in PCC pavements results in tufa formation, a primary cause of drainage outlet blockage in JPCP. Several useful recommendations to potentially improve Iowa subdrain performance, which warrant detailed field investigations, were made.
Download or read book Evaluation of Pavement Subsurface Drainage Conditions in Ohio written by Kamran Majidzadeh and published by . This book was released on 1976 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Evaluation of Subsurface Drainage System Design written by Getachew Alem and published by . This book was released on 1983 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Simulation for Evaluating the Effectiveness of Subsurface Interceptor Drains written by Hector Miguel Malano and published by . This book was released on 1985 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Design Methods of Subsurface Drainage Facilities for Highways written by George McClellan Slaughter and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Testing and Performance of Geosynthetics in Subsurface Drainage written by L. David Suits and published by ASTM International. This book was released on 2000 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains nine papers that were presented in the eponymously named, ASTM sponsored, conference held in Seattle, Washington, on June 29th, 1999. The papers are divided into treatments of field performance studies, pavement design and drainage, and testing, corresponding to the sessions of the symposium. Topics include cold-climate pavement drainage; performance-based specifications for highway edge drains; and tests of toe drain performance, transmissivity of geosynthetic drains, and clogging behavior. Annotation copyrighted by Book News, Inc., Portland, OR.
Download or read book Agricultural programs written by United States. Congress. House. Committee on Appropriations. Subcommittee on Agriculture, Rural Development, and Related Agencies and published by . This book was released on 1979 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Design Methods of Subsurface Drainage Facilities for Highways written by George M. Slaughter and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Landfill and Surface Impoundment Performance Evaluation Manual written by Charles A. Moore and published by . This book was released on 1983 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Effectiveness of Drainage Layers written by Jordan S. Whittington and published by . This book was released on 2007 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Roadway Subsurface Drainage on Rural Routes written by Roger Green and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Excess moisture has been identified as a cause for stripping, raveling, debonding, and rutting in flexible pavement [ODOT, 2016a]. The Ohio Department of Transportation (ODOT) has been getting substantially less than the expected 15 year service life after a resurfacing project, particularly on those routes without drainage. Providing drainage may help mitigate the premature failures ODOT is seeing on their rural routes. Section 205 of the 2016 Ohio DOT Pavement Design Manual (PDM) requires subsurface drainage on all new projects and recommends aggregate drains be used with bituminous surface treated and aggregate shoulders. Installing aggregate drains by contract during resurfacing has become costly for ODOT. This project was completed in two phases. The first phase focused on current practices of drainage installation on rural routes and on identifying available equipment for use by county crews. Phase 2 included a field evaluation to evaluate cost effective options for drainage incorporating the findings and recommendations from Phase 1. The Phase 1 evaluation identified aggregate drains as the appropriate drainage method and the rock saw as the most efficient equipment for aggregate drain installation. In Phase 2 aggregate drains were constructed by ODOT's Marion County personnel in forty test sections on State Route 529 using the rock saw and the backhoe. Drains were not installed in four sections which served as control sections, for a total of forty-four sections. Aggregate drains were installed using backfill meeting AASHTO #8, #57, and #4 gradations as well as a porous concrete backfill. Other factors evaluated included varied spacing between drains, trenches with and without fabric, compacted and un-compacted backfill, and narrow and wide trenches. Dynamic cone penetrometer testing was conducted before and after the monitoring period. The sections were monitored every four months for a one year period by testing with the falling weight deflectometer and measuring in-situ volumetric moisture.
Download or read book Public Roads written by and published by . This book was released on 1980 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pavement Subsurface Drainage Systems written by Barry Rodney Christopher and published by Transportation Research Board. This book was released on 1997 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to geologists; hydrologists; geotechnical, pavement, construction, and maintenance engineers; and researchers. State department of transportation (DOT) program managers and administrators will also find it of interest. The synthesis describes the current state of the practice for the design, construction, and maintenance of pavement subsurface drainage systems. It provides information on the positive effects of good subsurface drainage and the negative effects of poor subsurface drainage on pavement surfaces. This report of the Transportation Research Board presents data obtained from a review of the literature and a survey of the state DOTs. It is a supplemental update to NCHRP Synthesis of Highway Practice 96, Pavement Subsurface Drainage Systems (1982). The synthesis provides a supplement to design issues not found in Synthesis 96, but faced by current designers, e.g., type and quality of aggregate, compaction requirements for open-graded aggregates, asphalt and cement binders, and use of geosynthetics. In addition, it describes the effects of design, construction, and maintenance decisions on the performance of pavement subsurface drainage systems.
