Experimental And Numerical Study Of Subgrade Soil Migration Into Pavement Subbase And Mitigation Using Geotextile

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Experimental and Numerical Study of Subgrade Soil Migration Into Pavement Subbase and Mitigation Using Geotextile

Author : Behnoud Kermani
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Experimental and Numerical Study of Subgrade Soil Migration Into Pavement Subbase and Mitigation Using Geotextile by : Behnoud Kermani

Download or read book Experimental and Numerical Study of Subgrade Soil Migration Into Pavement Subbase and Mitigation Using Geotextile written by Behnoud Kermani and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle transport and its subsequent deposition in porous media play a significant role in the performance of civil infrastructure such as pavements. Pavement structure typically consists of an asphalt concrete or concrete surface layer, underlying granular layers (subbase and/or base), and a compacted subgrade soil layer. As the subgrade is saturated during wet seasons, cyclic loading caused by heavy traffic may lead to pumping of fine particles from the subgrade into the granular layers. Additionally, in rigid pavements, the repeated traffic loading may also result in redistribution of materials underneath the slabs, which contributes to faulting of rigid pavement slabs. Pumping of fines negatively impacts the performance and service life of the pavement and ultimately may lead to failure. The main objectives of this research are to (1) investigate occurrence of migration of fines and simulate and quantify the magnitude and rate of such migration in both flexible and rigid pavements and for different classes of roadways, (2) evaluate the effectiveness of geotextiles as a separation and filtration layer in preventing subgrade fines migration, and (3) understand the mechanisms of fines migration in pavement and provide a reasonable prediction of the amount of fines migration using a numerical model on particle transport in porous media.The cyclic traffic loading is simulated on geometrically-scaled models of flexible and rigid pavements representing a typical collector road and interstate highways using a one-third-scale Model Mobile Load Simulator (MMLS3), an accelerated pavement testing (APT) device. The pavement sections are constructed on partially saturated aggregate subbase overlying non-plastic saturated silt as subgrade. To evaluate the effectiveness of geotextile separation and filtration in reducing subgrade fines migration, identical tests simulating flexible collector road and rigid interstate highway are repeated, except that a geotextile layer is placed at the interface of subgrade and subbase layers. The results obtained from the tests with and without geotextile separator layer are then compared. The lab testing reveals that, under repeated traffic loading, a significant amount of fines migrated into the subbase. More migration occurs in the simulated collector road than in the interstate highway. The subgrade fines migration in mass percentage increases with the simulated traffic loading cycles. The resulting gradation of subbase also varies with the depth in the subbase, with more fines deposited in the lower section (closer to the subgrade) than in the upper section of the subbase. In the jointed rigid pavement, more fines accumulated in the subbase beneath the approach slab than beneath the leave slab, confirming that migration of fines counter to the direction of traffic occurs when the load moves to the leave slab. A geotextile separation layer at the subgrade-subbase interface can be used as an effective means to reduce pumping of subgrade fines in pavement by providing both separation and filtration. Finally, a numerical model is formulated to understand the mechanisms of particle transport in pavement and to provide a reasonable prediction of the amount of fines migration in pavement. The model is verified using the results from the scaled pavement testing conducted on flexible pavements to quantify the magnitude and rate of subgrade fines migration. The numerical study suggests that the deposition of the subgrade soil into subbase is governed by hydraulic condition, grain size of subgrade, grain size and pore size of subbase, permeability of subbase, and viscosity of pore fluid in the subbase. Moreover, magnitude and duration of applied load play a leading role in the amount of pumping in pavement, as also revealed in the experimental study.

Benefits of Using Geotextile Between Subgrade Soil and Base Course Aggregate in Low-volume Roads in Virginia

Author : M. Shabbir Hossain
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (435 download)

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Book Synopsis Benefits of Using Geotextile Between Subgrade Soil and Base Course Aggregate in Low-volume Roads in Virginia by : M. Shabbir Hossain

Download or read book Benefits of Using Geotextile Between Subgrade Soil and Base Course Aggregate in Low-volume Roads in Virginia written by M. Shabbir Hossain and published by . This book was released on 2009 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geosynthetics have increasingly been used since the 1960s in pavement structures to provide reinforcement; to serve as a permeable separator to prevent mixing of subgrade with subbase or base course materials; and to provide drainage. A reliable method of quantifying these benefits is needed to justify the more widespread use of these materials. The purpose of this study was to quantify the benefit of using a geotextile as a separator in low-volume roadways such as secondary and subdivision streets. A field trial was conducted on a section of Virginia Route 743 near the Charlottesville-Albemarle Airport in Albemarle County to achieve this objective. A geotextile was placed between the aggregate base and subgrade in one lane of the section to prevent failure attributable to intermixing, and the adjacent lane was left unmodified as a control. In addition to the field trial, a small-scale accelerated loading laboratory test was conducted to quantify the benefit of using geotextile as a separator for a range of pavement design variables, including variations in soil strength, traffic volume, and aggregate properties. A statistical analysis of data gathered by a falling weight deflectometer during construction and after 8 months of traffic showed the lane with geotextile to have a slightly higher structural capacity. As severe intermixing and base failure in the control section were not expected during the 8-month period because of the low volume of traffic and a dry season, the benefit may have been attributable to a reinforcing effect. Although the size of the apparatus and the boundary condition may have prevented the most accurate quantification of the benefit, the laboratory testing further demonstrated the benefit. Most laboratory samples with geotextile had less deformation than the control sample. Intermixing of soil and aggregate was not observed when very densely graded base aggregate was used. When a more open-graded aggregate was used, the geotextile reduced the amount of fines migration into the aggregate layer; however, the fouled aggregate did not appear to have lost significant structural stiffness. Therefore, the separator benefit of geotextile in the laboratory testing was also apparently attributable to a reinforcing effect. The use of geotextile materials appears to have great potential to extend the service life of pavements on the secondary road system, offering significant cost savings to VDOT. It is recommended that this section of road be periodically evaluated to quantify this potential increased service and that more test sections on subdivision streets with a weaker subgrade condition or full-scale accelerated testing be conducted for a reliable quantification of the benefit.

Water in Road Structures

Author : Andrew Dawson
Publisher : Springer Science & Business Media
ISBN 13 : 1402085621
Total Pages : 454 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Water in Road Structures by : Andrew Dawson

Download or read book Water in Road Structures written by Andrew Dawson and published by Springer Science & Business Media. This book was released on 2008-10-21 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Only book world-wide addressing this topic. The principal output of the European co-operative Action on "Water Movements in Road Pavements & Embankments". Provides unique guidance on assessing water condition and its affects on road performance. Provides unique guidance on assessing and ameliorating contaminant movement in pavement groundwater. Written by leading experts in Europe.

Geo-frontiers 2011

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (838 download)

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Book Synopsis Geo-frontiers 2011 by :

Download or read book Geo-frontiers 2011 written by and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Geotechnical Investigation and Design Tables

Author : Burt G. Look
Publisher : CRC Press
ISBN 13 : 020394660X
Total Pages : 356 pages
Book Rating : 4.2/5 (39 download)

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Book Synopsis Handbook of Geotechnical Investigation and Design Tables by : Burt G. Look

Download or read book Handbook of Geotechnical Investigation and Design Tables written by Burt G. Look and published by CRC Press. This book was released on 2007-04-26 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical handbook of properties for soils and rock contains, in a concise tabular format, the key issues relevant to geotechnical investigations, assessments and designs in common practice. In addition, there are brief notes on the application of the tables. These data tables are compiled for experienced geotechnical professionals who require a reference document to access key information. There is an extensive database of correlations for different applications. The book should provide a useful bridge between soil and rock mechanics theory and its application to practical engineering solutions. The initial chapters deal with the planning of the geotechnical investigation, the classification of the soil and rock properties and some of the more used testing is then covered. Later chapters show the reliability and correlations that are used to convert that data in the interpretative and assessment phase of the project. The final chapters apply some of these concepts to geotechnical design. This book is intended primarily for practicing geotechnical engineers working in investigation, assessment and design, but should provide a useful supplement for postgraduate courses.

Recommendations for Design and Analysis of Earth Structures using Geosynthetic Reinforcements - EBGEO

Author : Deutsche Gesellschaft für Geotechnik
Publisher : John Wiley & Sons
ISBN 13 : 3433601461
Total Pages : 279 pages
Book Rating : 4.4/5 (336 download)

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Book Synopsis Recommendations for Design and Analysis of Earth Structures using Geosynthetic Reinforcements - EBGEO by : Deutsche Gesellschaft für Geotechnik

Download or read book Recommendations for Design and Analysis of Earth Structures using Geosynthetic Reinforcements - EBGEO written by Deutsche Gesellschaft für Geotechnik and published by John Wiley & Sons. This book was released on 2012-01-09 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: The completely revised and extended Recommendations deal with all questions relevant to the planning and dimensioning of geosynthetics-reinforced earth structures. In addition to the demands on materials and analysis principles, the applications of geosynthetics in a range of foundation systems, ground improvement measures, highways engineering projects, in slopes and retaining structures, and in landfill engineering are discussed. The Recommendations have been supplemented by the following sections: - reinforced earth structures over point or linear bearing elements, - foundation systems using geotextile-encased columns, - bridging subsidence, - dynamic actions of geosynthetic-reinforced systems. The remaining sections have been fundamentally revised and updated in line with current standards and codes of practice.

Pavement Design and Materials

Author : A. T. Papagiannakis
Publisher : John Wiley & Sons
ISBN 13 : 1119412773
Total Pages : 555 pages
Book Rating : 4.1/5 (194 download)

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Book Synopsis Pavement Design and Materials by : A. T. Papagiannakis

Download or read book Pavement Design and Materials written by A. T. Papagiannakis and published by John Wiley & Sons. This book was released on 2017-02-22 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, state-of-the-art guide to pavement design and materials With innovations ranging from the advent of SuperpaveTM, the data generated by the Long Term Pavement Performance (LTPP) project, to the recent release of the Mechanistic-Empirical pavement design guide developed under NCHRP Study 1-37A, the field of pavement engineering is experiencing significant development. Pavement Design and Materials is a practical reference for both students and practicing engineers that explores all the aspects of pavement engineering, including materials, analysis, design, evaluation, and economic analysis. Historically, numerous techniques have been applied by a multitude of jurisdictions dealing with roadway pavements. This book focuses on the best-established, currently applicable techniques available. Pavement Design and Materials offers complete coverage of: The characterization of traffic input The characterization of pavement bases/subgrades and aggregates Asphalt binder and asphalt concrete characterization Portland cement and concrete characterization Analysis of flexible and rigid pavements Pavement evaluation Environmental effects on pavements The design of flexible and rigid pavements Pavement rehabilitation Economic analysis of alternative pavement designs The coverage is accompanied by suggestions for software for implementing various analytical techniques described in these chapters. These tools are easily accessible through the book’s companion Web site, which is constantly updated to ensure that the reader finds the most up-to-date software available.

Mechanistic-empirical Pavement Design Guide

Author : American Association of State Highway and Transportation Officials
Publisher : AASHTO
ISBN 13 : 156051423X
Total Pages : 218 pages
Book Rating : 4.5/5 (65 download)

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Book Synopsis Mechanistic-empirical Pavement Design Guide by : American Association of State Highway and Transportation Officials

Download or read book Mechanistic-empirical Pavement Design Guide written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2008 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Designing with Geosynthetics

Author : Robert M. Koerner
Publisher :
ISBN 13 :
Total Pages : 680 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Designing with Geosynthetics by : Robert M. Koerner

Download or read book Designing with Geosynthetics written by Robert M. Koerner and published by . This book was released on 1990 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geosynthetic materials have entered the mainstream in the professional arena and are no longer considered new construction material. Professionals need to keep up with the nuances of how geosynthetics work. Emphasizes design by function; overviews all types of geosynthetics, with stand-alone units on particular materials. Uses S.I. units for all problems and examples. Expands coverage of containers and tubes in the geotextile chapter. Discusses walls and slope design, including seismic analysis, in the geogrid chapter. Treats wet landfills, agricultural waste, waste stability, and dam waterproofing in the geomembrane chapter. Discusses new products and related performances in the geosynthetic clay liner chapter. Discusses new products and related behavior, including fiber reinforcement and wall drainage, in the geocomposite chapter. Adds a completely new chapter on geofoam. A useful reference for transportation, geotechnical, environmental, and hydraulics professionals and engineers.

Principles and Practice of Ground Improvement

Author : Jie Han
Publisher : John Wiley & Sons
ISBN 13 : 1118259912
Total Pages : 432 pages
Book Rating : 4.1/5 (182 download)

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Book Synopsis Principles and Practice of Ground Improvement by : Jie Han

Download or read book Principles and Practice of Ground Improvement written by Jie Han and published by John Wiley & Sons. This book was released on 2015-06-22 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gain a stronger foundation with optimal ground improvement Before you break ground on a new structure, you need to analyze the structure of the ground. Expert analysis and optimization of the geo-materials on your site can mean the difference between a lasting structure and a school in a sinkhole. Sometimes problematic geology is expected because of the location, but other times it's only unearthed once construction has begun. You need to be able to quickly adapt your project plan to include an improvement to unfavorable ground before the project can safely continue. Principles and Practice of Ground Improvement is the only comprehensive, up-to-date compendium of solutions to this critical aspect of civil engineering. Dr. Jie Han, registered Professional Engineer and preeminent voice in geotechnical engineering, is the ultimate guide to the methods and best practices of ground improvement. Han walks you through various ground improvement solutions and provides theoretical and practical advice for determining which technique fits each situation. Follow examples to find solutions to complex problems Complete homework problems to tackle issues that present themselves in the field Study design procedures for each technique to simplify field implementation Brush up on modern ground improvement technologies to keep abreast of all available options Principles and Practice of Ground Improvement can be used as a textbook, and includes Powerpoint slides for instructors. It's also a handy field reference for contractors and installers who actually implement plans. There are many ground improvement solutions out there, but there is no single right answer to every situation. Principles and Practice of Ground Improvement will give you the information you need to analyze the problem, then design and implement the best possible solution.

Track Geotechnology and Substructure Management

Author : Ernest Theodore Selig
Publisher : Thomas Telford
ISBN 13 : 9780727720139
Total Pages : 468 pages
Book Rating : 4.7/5 (21 download)

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Book Synopsis Track Geotechnology and Substructure Management by : Ernest Theodore Selig

Download or read book Track Geotechnology and Substructure Management written by Ernest Theodore Selig and published by Thomas Telford. This book was released on 1994-10-05 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive study provides practical advice and guidance on the important topics of rail transport and ground engineering, the use of which will result in optimum quality with the minimum maintenance effort and the most economical use of resources. The authors have synthesized all of their international knowledge and experience in this field, and produced, for the first time, a definitive guide for the design, construction, maintenance and renewal of railway track as they relate to geotechnology.

Highway Subdrainage Design

Author : Lyle K. Moulton
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Highway Subdrainage Design by : Lyle K. Moulton

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:

Advances in Computer Methods and Geomechanics

Author : Amit Prashant
Publisher : Springer Nature
ISBN 13 : 9811508860
Total Pages : 735 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Advances in Computer Methods and Geomechanics by : Amit Prashant

Download or read book Advances in Computer Methods and Geomechanics written by Amit Prashant and published by Springer Nature. This book was released on 2020-01-14 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents selected papers from IACMAG Symposium,The major themes covered in this conference are Earthquake Engineering, Ground Improvement and Constitutive Modelling. This volume will be of interest to researchers and practitioners in geotechnical and geomechanical engineering.

AASHTO Guide for Design of Pavement Structures, 1993

Author : American Association of State Highway and Transportation Officials
Publisher : AASHTO
ISBN 13 : 1560510552
Total Pages : 622 pages
Book Rating : 4.5/5 (65 download)

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Book Synopsis AASHTO Guide for Design of Pavement Structures, 1993 by : American Association of State Highway and Transportation Officials

Download or read book AASHTO Guide for Design of Pavement Structures, 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.

Guide to Pavement Technology

Author :
Publisher :
ISBN 13 : 9781921551536
Total Pages : 25 pages
Book Rating : 4.5/5 (515 download)

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Book Synopsis Guide to Pavement Technology by :

Download or read book Guide to Pavement Technology written by and published by . This book was released on 2009 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Bibliography on Cold Regions Science and Technology

Author :
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Bibliography on Cold Regions Science and Technology by :

Download or read book Bibliography on Cold Regions Science and Technology written by and published by . This book was released on 1993 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Foundations on Expansive Soils

Author : Fu Hua Chen
Publisher : Elsevier
ISBN 13 : 044460166X
Total Pages : 301 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Foundations on Expansive Soils by : Fu Hua Chen

Download or read book Foundations on Expansive Soils written by Fu Hua Chen and published by Elsevier. This book was released on 2012-12-02 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foundations on Expansive Soils provides the practicing engineer with a summary of the state-of-the-art of expansive soils and practical solutions based on the author's experience. The book is organized into two parts. Part I deals with theory and practice, and summarizes some of the theoretical physical properties of expansive soils. It also discusses various techniques employed to found structures on expansive soils such as drilled pier foundation, mat foundation, moisture control, soil replacement, and chemical stabilization. Topics covered include the origin, mineralogical composition, and the basic structure of expansive soils; the migration of water, swelling potential, and swelling pressure; site investigations and laboratory testing; moisture control; and soil stabilization. Part II presents case studies on the following: distress caused by pier uplift; distress caused by the improper design and construction of a drilled pier foundation system; distress caused by heaving of footing pad and floor slab; distress caused by heaving of continuous footings; and distress caused by a rise of ground water.