Direct Shear Tests Used in Soil-geomembrane Interface Friction Studies PDF Download
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Author: Richard A. Young
Publisher:
ISBN:
Category : Geomembrances
Languages : en
Pages : 68
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Book Description
Author: Richard A. Young
Publisher:
ISBN:
Category : Geomembrances
Languages : en
Pages : 68
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Saeed Kloofah Alzahrani
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
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Book Description
In the past thirty years, geosynthetic materials have been used widely in various civil engineering applications due to their numerous advantages. Geomembranes are one of the most common geosynthetics that are used primarily as an impervious boundary for liquids or gases. High density polyethylene (HDPE), the material used for geomembranes, shows a viscoelastic behavior to the applied loads over a period of time in the form of creep or stress relaxation. Effect of time on soil-geomembrane shear strength is critical factor that should be studied carefully, because soil-geomembrane interfaces usually form weak planes and may cause failures. A series of large direct shear tests were carried out in the laboratory to investigate the effect of time on soil-geomembrane interface shear strength. The geomembrane samples were placed under a sustained load for two weeks then the shear tests were performed. The test results showed that the interface friction angle increases with time due to further penetration of soil particles into the geomembrane, resulting in the increase of soil-geomembrane contact areas. This thesis presents the tests performed, results obtained, discussion of the results, findings, and recommendations for future studies
Author: Guang-xin Li
Publisher: Springer Science & Business Media
ISBN: 3540693130
Category : Technology & Engineering
Languages : en
Pages : 875
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Book Description
Geosynthetics in Civil and Environmental Engineering presents contributions from the 4th Asian Regional Conference on Geosynthetics held in Shanghai, China. The book covers a broad range of topics, such as: fundamental principles and properties of geosynthetics, testing and standards, reinforcement, soil improvement and ground improvement, filter and drainage, landfill engineering, geosystem, transport, geosynthetics-pile support system and geocell, hydraulic application, and ecological techniques. Special case studies as well as selected government-sponsored projects such as the Three Gorges Dam, Qinghai-Tibet Railway, and Changi Land reclamation project are also discussed. The book will be an invaluable reference in this field.
Author: J. David Frost
Publisher: IOS Press
ISBN: 1607504901
Category : Science
Languages : en
Pages : 168
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Book Description
Interfaces exist in every geotechnical system in many forms and at multiple scales. Although historically, they are often considered to be the weak link in a system, particularly as the result of a number of unexpected catastrophic failures, new insight gained over the past twenty years by researchers around the world has shown that it is possible to select combinations of materials and design an engineered interface so that it is at least as strong as the surrounding materials. These new insights have been gained as a result of experimental study, numerical modeling and analytical investigation of successful and failed systems. While individual technical papers have been presented and/or published in various forums and proceedings over the years, no technical event has ever been convened for the sole purpose of allowing for exchange of information and ideas pertaining to geotechnical interfaces. The research symposium held in September 2008 in Atlanta Georgia, USA, in conjunction with the Fourth International Symposium on Deformation Characteristics of Geomaterials (IS Atlanta 2008) at the Georgia Institute of Technology on The Characterization and Behavior of Interfaces addressed this deficiency and the papers presented at that event are contained in this publication. IOS Press is an international science, technical and medical publisher of high-quality books for academics, scientists, and professionals in all fields. Some of the areas we publish in: -Biomedicine -Oncology -Artificial intelligence -Databases and information systems -Maritime engineering -Nanotechnology -Geoengineering -All aspects of physics -E-governance -E-commerce -The knowledge economy -Urban studies -Arms control -Understanding and responding to terrorism -Medical informatics -Computer Sciences
Author: Dharma Wijewickreme
Publisher:
ISBN:
Category : Bridge decks
Languages : en
Pages : 19
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Book Description
The paper describes a new macro-scale direct shear test device for assessing the large-displacement soil/solid interface drained shear strength at low effective normal stresses. The testing method arises from a need to obtain the interface friction between soils and pipelines under low effective normal stress levels, which is an important consideration in the design of pipelines laid on the sea bed. The test device is fundamentally similar to the conventional small-scale direct shear box device except for its large footprint that provides a plan interface shear area of 3 m2 (1.72 m by 1.75 m). The device is designed to impart displacement-controlled interface-shearing at displacement rates ranging from 0.0001 mm/s to 1 mm/s and with the ability to reach a maximum interface shear displacement of 1.2 m. The desired normal stress at the soil/solid interface is obtained using surcharge loads externally applied by means of bulk sand or water masses, or both in certain cases. The device is instrumented with transducers mounted flush with the top of the solid surface for the measurement of pore-water pressure at the shear interface. As a result, the device allows for accurate determination of the effective normal stress at the soil/solid interface during interface shear testing. The key features of this device are described, and the device capabilities are demonstrated using tests conducted on Fraser-River-sand/mild-steel, plastic-silt/epoxy-coated-mild-steel, non-plastic-silt/epoxy-coated-mild-steel, and kaolinite/epoxy-coated-mild-steel interfaces at effective normal stresses between 3 and 7 kPa. The results can be also used as benchmarks to justify possible modifications of the currently available small-scale apparatus to reliably measure interface shear strength at such low effective normal stresses.
Author: J.M. Rigo
Publisher: CRC Press
ISBN: 020362680X
Category : Architecture
Languages : en
Pages : 290
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Book Description
Geomembranes are increasingly being used in transportation, environmental and geotechnical applications to control gas and liquid movement. This book provides authoritative guidance on testing of geomembranes. It has been prepared by an international committee of experts under the auspices of RILEM, the International Union of Research and Testing Laboratories for Materials and Structures.
Author: Madhavi Latha Gali
Publisher: Springer Nature
ISBN: 9811560862
Category : Science
Languages : en
Pages : 1098
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Book Description
This volume comprises select papers presented during the Indian Geotechnical Conference 2018, discussing issues and challenges relating to the characterization of geomaterials, modelling approaches, and geotechnical engineering education. With a combination of field studies, laboratory experiments and modelling approaches, the chapters in this volume address some of the most widely investigated geotechnical engineering topics. This volume will be of interest to researchers and practitioners alike.
Author: American Society for Testing Materials
Publisher:
ISBN:
Category : Shear strength of soils
Languages : en
Pages : 104
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Book Description
Author: Jay N. Meegoda
Publisher: American Society of Civil Engineers
ISBN:
Category : Nature
Languages : en
Pages : 148
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Book Description
Due to liability issues, landfills are no longer considered the best method of waste disposal. Innovative, safe disposal methods for large quantities of contaminated soils and waste are sought by engineers. In urban or industrial areas with most of the contamination, it has become very attractive to engineer contaminated soils and waste by physical or chemical methods and reuse them as construction materials. This proceedings addresses the following: the creation of useful products from contaminated soils and waste; changes in soil or waste properties after processing; logistics of the operations; and the regulatory issues associated with such usage. While alternative methods of disposal are being utilized, civil engineers are still involved in the development of large containment systems and must continue to increase their knowledge of these systems. Solid-waste landfills are made of multi-layered soil and geosynthetic liner systems underlying the fills and providing surface coverage. to a large degree by the shear strengths developed at interfaces between the soils and the geosynthetics forming part of either the liner or the cover systems. In this proceedings, recent research efforts to measure the interface strength between geomembranes and soils are presented.
