Use of Geogrids in Railroad Track

Use of Geogrids in Railroad Track
Author: David M. Coleman
Publisher:
Total Pages: 42
Release: 1990
Genre: Ballast (Railroads).
ISBN:

Geogrid has been defined as a deformed or nondeformed net-like polymetric material used with foundation, soil, rock, earth, or any other geotechnical engineering-related materials as an integral part of a human-made project, structure, or system. Geogrids are one of the geosynthetics that have seen increased use in railroad applications. In conjunction with design of railroad track at several military installations the question was raised as to the benefit of including a geogrid in the ballast to act as a reinforcement mechanism. The use of geogrids in railroad track applications was investigated to determine if the ballast thickness can be reduced using geogrids. Investigation was made of the advantages and disadvantages of using geogrids along with the possibility of reducing the ballast thickness through the use of a geogrid. All available technical literature applicable to the use of geogrids in railroad track was reviewed. A number of telephone calls and personal contacts were made with people in academia and in the geosynthetics and railroad industries who have been involved with the development, testing, and use of these materials in railroad track. A synopsis of the information that is currently available in relation to the use of geogrids in railroad track reinforcement is presented along with recommendations for the use of geogrids on low traffic density, low speed railroad tracks typical of those found on military installations. (edc).

Proceedings of the 15th European Conference on Soil Mechanics and Geotechnical Engineering

Proceedings of the 15th European Conference on Soil Mechanics and Geotechnical Engineering
Author: A. Anagnostopoulos
Publisher: IOS Press
Total Pages: 664
Release: 2013-03-21
Genre: Technology & Engineering
ISBN: 1614991995

This publication contains the papers presented at the 15th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE), held in Athens, Greece. Considerable progress has been made in recent decades in understanding the engineering behavior of those hard soils and weak rocks that clearly fall into either the field of soil or of rock mechanics, and there have been important developments in design and construction methods to cope with them. Progress would be even more desirable, however, for those materials which fall into the ‘grey’ area between soils and rocks. They present particular challenges due to their diversity, the difficulties and problems arising in their identification and classification, their sampling and testing and in the establishment of suitable models to adequately describe their behavior. The publication aims to provide an updated overview of the existing worldwide knowledge of the geological features, engineering properties and behavior of such hard soils and weak rocks, with particular reference to the design and construction methods and problems associated with these materials. Part 4 was published post-conference and includes Conference Reports.

Geosynthetic Reinforced Soil (GRS) Walls

Geosynthetic Reinforced Soil (GRS) Walls
Author: Jonathan T. H. Wu
Publisher: John Wiley & Sons
Total Pages: 414
Release: 2019-07-10
Genre: Technology & Engineering
ISBN: 1119375843

The first book to provide a detailed overview of Geosynthetic Reinforced Soil Walls Geosynthetic Reinforced Soil (GRS) Walls deploy horizontal layers of closely spaced tensile inclusion in the fill material to achieve stability of a soil mass. GRS walls are more adaptable to different environmental conditions, more economical, and offer high performance in a wide range of transportation infrastructure applications. This book addresses both GRS and GMSE, with a much stronger emphasis on the former. For completeness, it begins with a review of shear strength of soils and classical earth pressure theories. It then goes on to examine the use of geosynthetics as reinforcement, and followed by the load-deformation behavior of GRS mass as a soil-geosynthetic composite, reinforcing mechanisms of GRS, and GRS walls with different types of facing. Finally, the book finishes by covering design concepts with design examples for different loading and geometric conditions, and the construction of GRS walls, including typical construction procedures and general construction guidelines. The number of GRS walls and abutments built to date is relatively low due to lack of understanding of GRS. While failure rate of GMSE has been estimated to be around 5%, failure of GRS has been found to be practically nil, with studies suggesting many advantages, including a smaller susceptibility to long-term creep and stronger resistance to seismic loads when well-compacted granular fill is employed. Geosynthetic Reinforced Soil (GRS) Walls will serve as an excellent guide or reference for wall projects such as transportation infrastructure—including roadways, bridges, retaining walls, and earth slopes—that are in dire need of repair and replacement in the U.S. and abroad. Covers both GRS and GMSE (MSE with geosynthetics as reinforcement); with much greater emphasis on GRS walls Showcases reinforcing mechanisms, engineering behavior, and design concepts of GRS and includes many step-by-step design examples Features information on typical construction procedures and general construction guidelines Includes hundreds of line drawings and photos Geosynthetic Reinforced Soil (GRS) Walls is an important book for practicing geotechnical engineers and structural engineers, as well as for advanced students of civil, structural, and geotechnical engineering.

Geotechnics Fundamentals and Applications in Construction

Geotechnics Fundamentals and Applications in Construction
Author: Rashid Mangushev
Publisher: CRC Press
Total Pages: 466
Release: 2019-04-29
Genre: Technology & Engineering
ISBN: 0429608225

Geotechnical Fundamentals and Applications in Construction. New Materials, Structures, Technologies and Calculations contains the papers presented at the International Conference on Geotechnical Fundamentals and Applications in Construction. New Materials, Structures, Technologies and Calculations (GFAC 2019, Saint Petersburg, Russia, 6-8 February 2019). The contributions present the latest research findings, developments, and applications in the areas of geotechnics, soil mechanics, foundations, geological engineering and share experiences in the design of complex geotechnical objects, and are grouped in 8 sections: • Analytical decisions and numerical modeling for foundations; • Design and construction in geologically hazardous conditions; • Methods for surveying the features of dispersed, rocky soils and structurally unstable soils; • Exploration, territory improvement and reconstruction in conditions of compact urban planning and enterprises, etc.; • Construction, reconstruction and exploitation of infrastructure facilities in different soil conditions; • R&D support and quality control of new materials, design and technology solutions in constructing bases, foundations, underground and surface constructions; • Condition survey and accident evolution analysis in construction; • Up-to-date monitoring techniques in building construction and exploitation. Geotechnical Fundamentals and Applications in Construction. New Materials, Structures, Technologies and Calculations collects the state-of-the-art in geotechnology and construction, and will be of interest to academia and professionals in geotechnics, soil mechanics, foundation engineering and geological engineering.

Geosynthetics and Their Applications

Geosynthetics and Their Applications
Author: Sanjay Kumar Shukla
Publisher: Thomas Telford
Total Pages: 465
Release: 2002
Genre: Geosynthetics
ISBN: 0727731173

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.