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Author : Woon-Hyung Kim
Publisher :
ISBN 13 :
Total Pages : 254 pages
Book Rating : 4.:/5 (89 download)
Download or read book Behavior of Geosynthetic-reinforced Aggregate Platforms Over Soft Subgrades written by Woon-Hyung Kim and published by . This book was released on 2003 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (89 download)
Download or read book Effectiveness of Geosynthetics in Stabilizing Soft Subgrades written by and published by . This book was released on 2005 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (89 download)
Download or read book Equivalency of Crushed Rock with Industrial By-products and Geosynthetic-reinforced Aggregates Used for Working Platforms During Pavement Construction written by and published by . This book was released on 2005 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tuncer B. Edil
Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.3/5 (555 download)
Download or read book Development of Testing Methods to Determine Interaction of Geogrid-reinforced Granular Material for Mechanistic Pavement Analysis written by Tuncer B. Edil and published by . This book was released on 2009 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : American Society of Civil Engineers
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.X/5 (3 download)
Download or read book Soil and Material Inputs for Mechanistic-empirical Pavement Design 2007 written by American Society of Civil Engineers and published by . This book was released on 2007 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ryan Berg
Publisher :
ISBN 13 :
Total Pages : 352 pages
Book Rating : 4.:/5 (547 download)
Download or read book GMA White Paper Ii written by Ryan Berg and published by . This book was released on 2000 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geosynthetic reinforcement of the base, or subbase, course of pavement structures is addressed. The value added with reinforcement, design criteria/protocols, and practices for design and for material specifications are presented. Base, or subbase, reinforcement is defined within as the use of geosynthetic reinforcement in flexible pavements to support vehicular traffic over the life of a pavement structure. Primary base reinforcement benefits are to improve the service life and/or obtain equivalent performance with a reduced structural section. Substantial life-cycle cost savings are possible with base reinforcement. The use of geosynthetic reinforcement to aid in construction over low strength subgrades, termed subgrade restraint within, is also addressed. Geosynthetic reinforcement is used to increase the support equipment during construction of a roadway. Geogrid, geotextile, and geogrid-geotextile composite materials are addressed within.
Author :
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (1 download)
Download or read book Development of Methodology to Include the Strength Contribution of Select Subgrade Materials in Pavement Structure written by and published by . This book was released on 2005 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : IOS Press
Publisher : IOS Press
ISBN 13 : 1614992975
Total Pages : 624 pages
Book Rating : 4.6/5 (149 download)
Download or read book Proceedings of the 5th International Young Geotechnical Engineers' Conference written by IOS Press and published by IOS Press. This book was released on 2013-08-20 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geotechnical engineers are at work worldwide, contributing to sustainable living and to the creation of safe, economic and pleasant spaces to live, work and relax. With increased pressure on space and resources, particularly in cities, their expertise becomes ever more important. This book presents the proceedings of the 5th iYGEC, International Young Geotechnical Engineers' Conference, held at Marne-la-Vallée, France, from 31 August to 1 September 2013. It is also the second volume in the series Advances in Soil Mechanics and Geotechnical Engineering. The papers included here cover topics such as laboratory and field testing, geology and groundwater, earthworks, soil behavior, constitutive modeling, ground improvement, earthquake, retaining structures, foundations, slope stability, tunnels and observational methods. The iYGEC conference series brings together students and young people at the start of their career in the geotechnical professions to share their experience, and this book will be of interest to all those whose work involves soil mechanics and geotechnical engineering. The cover shows Dieppe harbour breakwater project, Louis-Alexandre de Cessart, 1776-1777. © École Nationale des Ponts et Chaussées.
Author : Mir Md Tamim
Publisher :
ISBN 13 :
Total Pages : 127 pages
Book Rating : 4.:/5 (13 download)
Download or read book Evaluating the Effectiveness of a Hybrid Geosynthetic Reinforcement System to Mitigate Differential Heave on Flexible Pavement Due to Expansive Subgrades written by Mir Md Tamim and published by . This book was released on 2017 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Transportation industries encounter substantial challenges with respect to ride quality and serviceability when they deal with expansive soils underneath roadway structures. These soils exhibit swell-shrink behavior with moisture variations, which cause surficial heaving on the pavement structure and cost billions of dollars for the maintenance of pavements. For the past four decades, a particular stretch of US-95 (Oregon line to Elephant Butte) exhibited recurrent swelling distresses due to the underlying expansive soils. Despite remedial measures that exhibited satisfactory results for most of the sections, recurrent damage still continued in few sections. Further research indicated that the problematic soils were located at a depth below 1.82 m. Conventional chemical remediation methods typically performed at a depth no greater than 0.9 to 1.2 m. To be able to address the adverse effects of this swell-shrink behavior of soil at a deeper depth, hybrid geosynthetic systems were proposed. Hybrid geosynthetic systems were successfully used to mitigate expansive soil swelling in railroad applications. Hence, this research study explored this idea of using hybrid geosynthetic reinforcement systems (geocell-geogrid combination) to mitigate differential pavement heaving resulting from underlying expansive soils. To evaluate the use of hybrid geosynthetic systems in reducing differential heaving from expansive subgrades, a large-scale box test was developed to simulate a pavement section with a base course and expansive subgrade (asphalt overlay was ignored). The surficial heaving on the base course reinforced with geocell, geogrid and hybrid geosynthetic reinforced system (HGRS) were measured over time and compared with the unreinforced case. The large-scale box test results showed that the geosynthetic systems significantly reduced the maximum surficial heave along with the differential swelling on the pavement section. HGRS exhibited better performance than geocells and geogrids. Numerical analysis using the finite element approach was conducted to study the response of other soil types not tested in the box. The numerical model was first calibrated using using the box test results and the calibrated model was used to change soil properties for two other soil types with different swelling charecteristics. In the numerical model, swelling behavior of expansive soils was simulated using material models that incorporate volumetric swelling and suction as a function of moisture content. The modulus of the unreinforced base was determined using laboratory tests while the modulus that for the reinforced sections was calibrated using large scale test data. The calibration of control model was performed by controlling the moisture percolation through subgrade."--Boise State University ScholarWorks.
Author : Robert M. Koerner
Publisher :
ISBN 13 :
Total Pages : 680 pages
Book Rating : 4.3/5 (91 download)
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.
Author :
Publisher : Thomas Telford Publishing
ISBN 13 :
Total Pages : 264 pages
Book Rating : 4.E/5 ( download)
Download or read book Polymer Grid Reinforcement written by and published by Thomas Telford Publishing. This book was released on 1985 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Professor Jian Chu
Publisher : Elsevier
ISBN 13 : 0080457363
Total Pages : 1137 pages
Book Rating : 4.0/5 (84 download)
Download or read book Ground Improvement written by Professor Jian Chu and published by Elsevier. This book was released on 2005-11-07 with total page 1137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book of its kind, providing over thirty real-life case studies of ground improvement projects selected by the worlds top experts in ground improvement from around the globe. Volume 3 of the highly regarded Elsevier Geo-engineering book series coordinated by the Series Editor: Professor John A Hudson FREng. An extremely reader friendly chapter format. Discusses wider economical and environmental issues facing scientists in the ground improvement. Ground improvement has been both a science and art, with significant developments observed through ancient history. From the use of straw as blended infill with soils for additional strength during the ancient Roman civilizations, and the use of elephants for compaction of earth dams during the early Asian civilizations, the concepts of reinforced earth with geosynthetics, use of electrokinetics and thermal modifications of soils have come a long way. The use of large and stiff stone columns and subsequent sand drains in the past has now been replaced by quicker to install and more effective prefabricated vertical drains, which have also eliminated the need for more expensive soil improvement methods.The early selection and application of the most appropriate ground improvement techniques can improve considerably not only the design and performance of foundations and earth structures, including embankments, cut slopes, roads, railways and tailings dams, but also result in their cost-effectiveness. Ground improvement works have become increasingly challenging when more and more problematic soils and marginal land have to be utilized for infrastructure development.This edited compilation contains a collection of Chapters from invited experts in various areas of ground improvement, who have illustrated the basic concepts and the applications of different ground improvement techniques using real projects that they have been involved in. The case histories from many countries ranging from Asia, America, Australia and Europe are addressed.
Author : Murad Yusuf Abu-Farsakh
Publisher :
ISBN 13 :
Total Pages : 107 pages
Book Rating : 4.:/5 (111 download)
Download or read book Accelerated Load Testing of Geosynthetic Base Reinforced Unpaved and Pavement Test Sections written by Murad Yusuf Abu-Farsakh and published by . This book was released on 2019 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research study aims at evaluating the benefits of using geosynthetics to reinforce/stabilize base aggregate layer/subgrade in pavements under repeated loading test conditions. For this purpose, a total of six 80-ft. long and 13 ft. wide full-scale test lane sections were constructed, among which two sections were reinforced by one or two layers of triaxial geogrids, two sections were reinforced by one layer of high strength woven geotextile with different base layer thickness, and the remaining two sections were the control sections. The field test sections were instrumented by a variety of sensors to measure the load- and environment-associated pavement response and performance. Two series of tests, moving wheel load tests and cyclic plate load tests, were conducted to investigate the field performance of geosynthetic reinforced/stabilized paved roads and to identify the differences in pavement response to moving wheel and cyclic plate loads. In addition, six similar test sections were constructed inside a 6.5-ft. × 6.5-ft. × 5.5-ft. test box. The test box sections were also instrumented by a variety of sensors to measure the load-associated pavement response and performance. Laboratory cyclic plate load tests were then conducted. The results of accelerated load testing on the pavement test sections demonstrate the benefits of using geosynthetics in reducing the permanent deformation in the pavement structure. The adjusted traffic benefit ratio (TBRadj) associated with geosynthetic reinforcement can be increased up to 2.12 at a rut depth of 0.75 in. for pavement constructed using 18 in. thick base layer on top of weak subgrade soil using two layers of geogrid reinforcement. The inclusion of geosynthetics results in redistributing the applied load to a wider area, thus reducing the accumulated permanent deformation within the subgrade. The benefit of geosynthetics on reducing the maximum stress on top of subgrade is more appreciable at higher load levels. It was also found that the geosynthetics placed at the base-subgrade interface was able to improve the performance of both subgrade and base layers; by placing an additional layer of geogrid at the upper one-third of the base layer, the performance of the base layer was further enhanced. While geosynthetics showed appreciable benefit on reducing the permanent deformation of the subgrade layer, it showed less effect on the resilient properties of the subgrade layer. Drainage of the base layer has important effect on the performance of pavement structures for both unreinforced and reinforced lane sections. The life-cycle cost analysis (LCCA) demonstrated the cost savings of using geosynthetics in pavement as compared to the unreinforced/untreated sections. However, compared to the 12-in. cement/lime treated subgrade with the cement stabilized base pavement section, the LCCA showed it is more cost effective to use geosynthetics for base thickness less than 12 in. (or 15 in. of unreinforced aggregate base). The cost benefit becomes close for base thickness 12 in. between using a single geosynthetic layer and a 12-in. cement/lime treated subgrade with a cement stabilized base. Moreover, the cost benefit of using double geogrid layers exceeds the cost savings of a 12-in. treated subgrade with a cement stabilized base.
Author : Satyajit Patel
Publisher : Springer Nature
ISBN 13 : 9813364440
Total Pages : 848 pages
Book Rating : 4.8/5 (133 download)
Download or read book Proceedings of the Indian Geotechnical Conference 2019 written by Satyajit Patel and published by Springer Nature. This book was released on 2021-04-24 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises select proceedings of the annual conference of the Indian Geotechnical Society. The conference brings together research and case histories on various aspects of geotechnical and geoenvironmental engineering. The book presents papers on geotechnical applications and case histories, covering topics such as (i) Characterization of Geomaterials and Physical Modelling; (ii) Foundations and Deep Excavations; (iii) Soil Stabilization and Ground Improvement; (iv) Geoenvironmental Engineering and Waste Material Utilization; (v) Soil Dynamics and Earthquake Geotechnical Engineering; (vi) Earth Retaining Structures, Dams and Embankments; (vii) Slope Stability and Landslides; (viii) Transportation Geotechnics; (ix) Geosynthetics Applications; (x) Computational, Analytical and Numerical Modelling; (xi) Rock Engineering, Tunnelling and Underground Constructions; (xii) Forensic Geotechnical Engineering and Case Studies; and (xiii) Others Topics: Behaviour of Unsaturated Soils, Offshore and Marine Geotechnics, Remote Sensing and GIS, Field Investigations, Instrumentation and Monitoring, Retrofitting of Geotechnical Structures, Reliability in Geotechnical Engineering, Geotechnical Education, Codes and Standards, and other relevant topics. The contents of this book are of interest to researchers and practicing engineers alike.
Download or read book Characteristics and Behavior of Geogrid-Reinforced Aggregate Under Cyclic Load written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to investigate the behavior of reinforced unpaved structure under cyclic load through laboratory testing, finite element and theoretical analyses. Main focus of research was on such behavior with degradation of aggregate base layer. Fourteen laboratory large-scale cyclic load plate tests were conducted on unpaved structure sections with two base course thicknesses and several geosynthetic reinforcements placed between base layer and subgrade. Results indicated that reinforcement improved stress distribution transferred to the subgrade, and decreased degradation of base course and surface deformation accumulation. Stiffer geogrids showed better stress attenuation effect and reduced plastic surface deformation as compared with lower modulus geogrids. Degradation was related to base layer thickness and base layer/geogrid interaction. The degradation and permanent surface deformation were correlated to geogrid torsional stiffness. Performance of geogrid-reinforced test sections was simulated using the FEM program ABAQUS. FEM results indicated that geogrid reinforcement can provide lateral confinement at the bottom of the base layer by improving interface shear resistance and increasing mean stress at the bottom of the base layer. The effect of geogrid reinforcement was also shown to reduce surface deformation, improve stress distribution on subgrade layer, and reduce strain induced at the bottom of the base layer due to lateral spread. As ABC thickness decreased, or the elastic modulus ratio decreased, the benefit due to geogrid reinforcement becomes more apparent. In general, geogrid with higher tensile modulus and better interface friction coefficient enhanced the reinforcement effects. A new unpaved road design model was developed on the basis of geogrid reinforcement mechanisms, degradation of base course, and mobilization of subgrade bearing capacity. Required base course thicknesses calculated using the proposed method compared favor.
Author : Sanjay Kumar Shukla
Publisher : Thomas Telford
ISBN 13 : 0727731173
Total Pages : 465 pages
Book Rating : 4.7/5 (277 download)
Download or read book Geosynthetics and Their Applications written by Sanjay Kumar Shukla and published by Thomas Telford. This book was released on 2002 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents topics that are based on field application areas for geosynthetics in civil engineering. This book also includes case histories and practical aspects of the application of geosynthetics, along with developments and references. It is useful for students and engineers in search of approaches to solutions for civil engineering problems.
Author : Jie Han
Publisher : John Wiley & Sons
ISBN 13 : 1118259912
Total Pages : 432 pages
Book Rating : 4.1/5 (182 download)
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.
