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Author : G. K. Wells
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (318 download)
Download or read book Evaluation of Edge Drain Performance written by G. K. Wells and published by . This book was released on 1985 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James Alan McKean
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (319 download)
Download or read book Field Evaluation of the Long-term Performance of Geocomposite Sheet Drains written by James Alan McKean and published by . This book was released on 2000 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The long-term performance of geocomposite sheet drains were monitored at three sites by measuring the effect of the drains on site groundwater hydrology during peak groundwater events. The study is on-going with a maximum record of 14 years at one site in the southern Sierra Nevada Range, CA.?Over a 3-year period, the drain at one site produced as much as 100 liters per minute with no rise in the water table just down gradient from the drain. The peak hydraulic gradient toward this drain consistently reaches 0.66 to 0.73 during major rainstorms and returns to a S2base levelS3 of 0.45 to 0.50 within 10 days after a storm peak.?At a second site, the drain flowed up to 15 liters per minute with no water table rise in a retaining wall fill down gradient from the drain. Performance of this drain was consistently favorable over a 14-year period with no deterioration. Limited data suggest that the drain discharge (liters per minute) is proportional to about 13 times the hydraulic gradient toward the drain.?At a third site, drain performance is limited by construction problems. A collapsed trench wall during drain placement caused an uneven drain slope toward the outlet. This is a common problem of trench drains at sites with a high water table. The problem could be greatly mitigated by returning to one of the pioneering geocomposite drain designs, the Eljen Drain, in which vertical sections of the drain are completely independent units that can be immediately dropped into a trench behind the excavator. Despite the construction problems, the drain is partially dewatering the road prism just down gradient, as seen by approximately 1.2 meters of groundwater drawdown beneath the road.
Author : T. S. Rutkowski
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (89 download)
Download or read book Performance Evaluation of Drained Pavement Structures written by T. S. Rutkowski and published by . This book was released on 1998 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research study focused on positive drainage of pavement structures. The open-graded base course concepts included non-stabilized, asphalt cement concrete (AC) stabilized and portland cement concrete (PCC) stabilized. Drainage systems included pipe in trenches, fin-type, pipe beneath transverse joints and retrofitted pipe. Non-drainage elements included 3.05 m (14 ft) wide driving lanes, and a 30.48 cm (12 in.) layer of "select embankment". Twelve projects were monitored, both portland cement concrete surface and asphaltic concrete surface. Measurement surveys included Pavement Distress Index (PDI), transverse joint faulting, International Roughness Index (IRI) ride quality, and coring at the transverse joints.
Author : Andrew G. Heydinger
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.3/5 (555 download)
Download or read book Evaluation of Prefabricated Edge Drains (PED) in Ohio written by Andrew G. Heydinger and published by . This book was released on 1998 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was conducted to evaluate prefabricated edge drain (PED) construction procedures and to assess the condition of PEDs installed in Ohio between 1988 and 1993. The research included a survey of department of transportation engineers in other states and Ohio Department of Transportation (ODOT) design and construction engineers. The condition of PEDs installed in Ohio was evaluated at six sites throughout Ohio by excavating short sections of PEDs for visual inspections and permittivity testing. A video borescope with a 25-ft (7.6-m) long fiber optic cable was used to investigate the in situ condition of the PED. Permittivity testing of the PED fabric was conducted in the field on PED samples removed from the excavations. Specifications for installing PED vary considerably among the states using PED. ODOT current specifications require placing the PED on the outside of the trench and using a granular backfill. Problems that have been reported include deformation of the PED core, compression of the filter fabric into the core, blinding and clogging of the filter, sedimentation of the core and blockage of drainage outlets. In most cases, the problems were considered minor. The problems cited above were observed at all six sites during the video borescope inspections. In spite of problems with the filter fabric, the permittivity of the filter fabric was not significantly reduced. The problems with PED result in reduced drainage capacity. However, the PEDs are effective in providing drainage provided the drainage outlets are not blocked. Construction specifications should be observed to minimize problems. Maintenance personnel should inspect drainage outlets on a regular basis to ensure that the outlets are not blocked.
Author : L. David Suits
Publisher : ASTM International
ISBN 13 : 0803128606
Total Pages : 126 pages
Book Rating : 4.8/5 (31 download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.3/5 (91 download)
Download or read book FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1993 written by and published by . This book was released on 1993 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Journal Editors
Publisher : Elsevier
ISBN 13 : 9780080440958
Total Pages : 344 pages
Book Rating : 4.4/5 (49 download)
Download or read book Geotechnology Compendium I written by Journal Editors and published by Elsevier. This book was released on 2002-03-06 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Geotechnical Compendium I" provides a collection of the best articles from the year 2000. The papers, selected by the Editors, are taken from the following journals: Computers and Geotechnics Geotextiles and Geomembranes International Journal of Rock Mechanics and Mining Sciences Journal of Terramechanics Soil Dynamics and Earthquake Engineering Tunnelling and Underground Space Technology
Author :
Publisher :
ISBN 13 :
Total Pages : 520 pages
Book Rating : 4.:/5 (1 download)
Download or read book Concrete Pavement Design Manual written by and published by . This book was released on 1992 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 466 pages
Book Rating : 4.3/5 ( download)
Download or read book National Experimental Projects Tabulation written by and published by . This book was released on 1985 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shobha Krishna Bhatia
Publisher : ASTM International
ISBN 13 : 0803120478
Total Pages : 241 pages
Book Rating : 4.8/5 (31 download)
Download or read book Recent Developments in Geotextile Filters and Prefabricated Drainage Geocomposites written by Shobha Krishna Bhatia and published by ASTM International. This book was released on 1996 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides information on woven and non-woven geotextiles used for filtering and drainage in geotechnical engineering. The design of such filters balances large pores for adequate permeability with smaller pores for proper soil retention. Of the 15 papers from a June 1995 symposium in Denver, Colorado
Author : J.W. Bull
Publisher : Springer Science & Business Media
ISBN 13 : 1461526442
Total Pages : 203 pages
Book Rating : 4.4/5 (615 download)
Download or read book Precast Concrete Raft Units written by J.W. Bull and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of precast concrete is a well-established construction technique for beams, floors, panels, piles, walls and other structural elements. The advan tages of precasting include excellent quality control, economical large scale production, improved construction productivity (especially in adverse weather conditions) and immediate structure availability. These advantages have been recognized for precast concrete raft pavement units (raft units) since their introduction in the 1930s. In the last ten years there has been a considerable increase in the use ofraft units, especially in their range of applications, their analysis and their design. However, the description of these developments has been published in academicjournals and conference proceedings which are not readily available to practising raft unit pavement design engineers. Pavement design engineers are underincreasingpressure to produce raft unit designs that are inexpensive, long lasting and able to allow reorganization to accommodate changing use and uncertainty offuture loading requirements. This is the first book devoted to raft unit pavements, and will become a standard work of reference.
Author : Gordon K. Wells
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (318 download)
Download or read book Evaluate Effectiveness of PCCP Rehabilitation Techniques written by Gordon K. Wells and published by . This book was released on 1987 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Barry Rodney Christopher
Publisher : Transportation Research Board
ISBN 13 : 9780309060158
Total Pages : 56 pages
Book Rating : 4.0/5 (61 download)
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.
Author : Wynand JvdM. Steyn
Publisher : Transportation Research Board
ISBN 13 : 0309223660
Total Pages : 257 pages
Book Rating : 4.3/5 (92 download)
Download or read book Significant Findings from Full-scale Accelerated Pavement Testing written by Wynand JvdM. Steyn and published by Transportation Research Board. This book was released on 2012 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 433: Significant Findings from Full-Scale Accelerated Pavement Testing documents and summarizes significant findings from the various experimental activities associated with full-scale accelerated pavement testing (f-sAPT) programs that have taken place between 2000 and 2011. The report also identifies gaps in knowledge related to f-sAPT and where future research may be needed. NCHRP Synthesis 433 is designed to expand the f-sAPT base of knowledge documented in NCHRP Syntheses 325 and 235, both with the same title of Significant Findings from Full-Scale Accelerated Pavement Testing. f-sAPT is the controlled application of a wheel loading, at or above the appropriate legal load limit, to a pavement system to determine pavement response in a compressed time period. The acceleration of damage is achieved by one or more of the following factors: increased repetitions, modified loading conditions, imposed climatic conditions, and thinner pavements with a decreased structural capacity which have shorter design lives"--
Author :
Publisher :
ISBN 13 :
Total Pages : 752 pages
Book Rating : 4.F/5 ( download)
Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Bureau of Standards
Publisher :
ISBN 13 :
Total Pages : 766 pages
Book Rating : 4.3/5 (91 download)
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1977 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Bureau of Standards. Technical Information and Publications Division
Publisher :
ISBN 13 :
Total Pages : 1116 pages
Book Rating : 4.3/5 (91 download)
Download or read book Catalog of National Bureau of Standards Publications, 1966-1976: pt. 1-2. Citations and abstracts. v. 2. pt. 1-2. Key word index written by United States. National Bureau of Standards. Technical Information and Publications Division and published by . This book was released on 1978 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
