Material Characterization and Design Recommendations for Mechanically Stabilized Earth Retaining Walls PDF Download
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Author: Vishal Sambaiah Dantal Publisher: ISBN: Category : Languages : en Pages : 243
Book Description
Since its appearance in 1970s, mechanically stabilized earth (MSE) walls have become a majority among all types of retaining walls due to their economics and satisfactory performance. The Texas Department of Transportation has primarily adopted the Federal Highway Administration and American Association of State Highway and Transportation Officials (AASHTO) guidelines for design of MSE walls. The research addresses three main issues expressed by TxDOT in their design and material selection process. The literature review in this research addresses the current practice and guidelines adopted by TxDOT as well as other Department of Transportations. The first part of this dissertation explains the laboratory test performed on backfill materials used in Texas. The material classification was carried out according to TxDOT specifications and the laboratory test consist of performing state-of-the-art large scale triaxial test on large particles to evaluate engineering properties of backfill materials and a consolidated undrained test on a backfill material with higher amount fine particles present in that soil. The second part of this addresses the issues on global stability and failure modes associated with it. A Fast Lagrangian Analysis of Continua (FLAC) program was used to asseses possible failure modes for MSE walls with different geometries and soil parameters for retained and foundation soils. Finally, a parametric study was performed for sliding analysis using AASTHO recommended design parameters and comparing them with modified design parameters calculated from FLAC simulations for different geometries and soil parameters. Similarly, a parametric study was performed to address bearing capacity issues for MSE walls and justification of AASHTO recommendation with German code (EBGEO) for MSE walls. The outcome this research shows that, the friction angle (Ø) for the backfill materials used in Texas is higher than AASHTO recommended values for large particles size type backfills. From FLAC simulations it shows that the global failure mechanism for MSE walls is dependent on type of soil properties used as retained and foundation soils. The parametric study shows that a modified parameters can be used for sliding analysis and for bearing capacity analysis a combination of Vesic's and German code can be used. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151797
Author: Vishal Sambaiah Dantal Publisher: ISBN: Category : Languages : en Pages : 243
Book Description
Since its appearance in 1970s, mechanically stabilized earth (MSE) walls have become a majority among all types of retaining walls due to their economics and satisfactory performance. The Texas Department of Transportation has primarily adopted the Federal Highway Administration and American Association of State Highway and Transportation Officials (AASHTO) guidelines for design of MSE walls. The research addresses three main issues expressed by TxDOT in their design and material selection process. The literature review in this research addresses the current practice and guidelines adopted by TxDOT as well as other Department of Transportations. The first part of this dissertation explains the laboratory test performed on backfill materials used in Texas. The material classification was carried out according to TxDOT specifications and the laboratory test consist of performing state-of-the-art large scale triaxial test on large particles to evaluate engineering properties of backfill materials and a consolidated undrained test on a backfill material with higher amount fine particles present in that soil. The second part of this addresses the issues on global stability and failure modes associated with it. A Fast Lagrangian Analysis of Continua (FLAC) program was used to asseses possible failure modes for MSE walls with different geometries and soil parameters for retained and foundation soils. Finally, a parametric study was performed for sliding analysis using AASTHO recommended design parameters and comparing them with modified design parameters calculated from FLAC simulations for different geometries and soil parameters. Similarly, a parametric study was performed to address bearing capacity issues for MSE walls and justification of AASHTO recommendation with German code (EBGEO) for MSE walls. The outcome this research shows that, the friction angle (Ø) for the backfill materials used in Texas is higher than AASHTO recommended values for large particles size type backfills. From FLAC simulations it shows that the global failure mechanism for MSE walls is dependent on type of soil properties used as retained and foundation soils. The parametric study shows that a modified parameters can be used for sliding analysis and for bearing capacity analysis a combination of Vesic's and German code can be used. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151797
Author: Publisher: ISBN: Category : Dikes (Engineering) Languages : en Pages : 480
Book Description
This manual provides guidance for the safe design and economical construction of retaining and flood walls. This manual is intended primarily for retaining walls which will be subjected to hydraulic loadings such as flowing water, submergence, wave action, and spray, exposure to chemically contaminated atmosphere, and/or severe climatic conditions. For the design of retaining walls which will not be subjected to hydraulic loadings or severe environmental conditions as described above, TM S-8l8-l may be used for computing the loadings and evaluating the stability of the structure.
Author: Hoe I. Ling Publisher: CRC Press ISBN: 0824756436 Category : Technology & Engineering Languages : en Pages : 505
Book Description
This one-of-a-kind reference evaluates the efficacy, stability, and strength of various soil walls, slopes, and structures enhanced by geosynthetic materials. Offering stimulating contributions from more than 50 leading specialists in the field, Reinforced Soil Engineering compiles recent innovations in design layout, controlled construction, and geosynthetic material implementation for improved cost-efficiency, maintenance, and functioning in civil engineering applications. The book focuses on geotechnical earthquake issues and case histories from countries including the United States, Canada, Japan, Taiwan, Turkey, and other European nations.
Author: Christopher L. Meehan Publisher: ISBN: 9780784412787 Category : Civil engineering Languages : en Pages : 2280
Book Description
This Geotechnical Special Publication contains 229 peer-reviewed technical papers and case studies focusing on the stability, performance, and rehabilitation of slopes, embankments, and dams. Topics include: exploration and characterisation of soil and rock slopesdesign, analysis, and performance of slopesmonitoring and inspection of slopeshazard assessment and managementground improvement and stabilisation in the repair and remediation of slopes. These papers are valuable to geotechnical researchers and practicing engineers, especially those interested in the design and maintenance of slopes, embankments and dams.
Author: Dr. Suresh Kommu & Dr. SS. Asadi Publisher: Lulu Publication ISBN: 1387737007 Category : Art Languages : en Pages : 128
Book Description
The embankment is the most ancient form of civil engineering structures which refers to a volume of earthen material that is placed and compacted to raise the grade of a road way above the level of the existing surrounding ground surface. The design and performance of the embankment mainly depend upon the purpose of construction. In the in field of hydraulics, the embankment is designed for field control and seepage control in the field of transportation, the design of the embankment is concern about differential settlement due to external loads. Based on the type of material used for construction Embankment is classified into several categories like a reinforced embankment, earth fill, and rock fill embankment. In the roadway based on the requirement and design, the existing embankment is extended to serve the purpose.
Author: Swami Saran Publisher: I K International Pvt Ltd ISBN: 938590972X Category : Technology & Engineering Languages : en Pages : 435
Book Description
Reinforced soil is a composite material formed by the association of frictional soil and tension-resistant elements in the form of sheets, strips, nets or mats of metal, synthetic fabrics, or fibre reinforced plastics and arranged in the soil mass in such a way as to reduce or suppress the tensile strain that might develop under gravity and boundary forces. The variety and range of applications of reinforced soil technique are unlimited. Jones (1985) identified several field applications, viz., retaining walls, abutments, quay walls, embankments, dams, hill roads, housing, foundations, railways, industry, pipe works, waterway structures and underground structures. In several countries structures have been constructed using this technique and the concept has become very popular. The book covers all the important topics like Basic Mechanism, Strength Characteristics, Frictional Characteristics, Reinforced Soil, Wall, Wall with Reinforced Backfill, Foundation on Reinforced Soil, Soil Nailing and Randomly Distributed soil. Each chapter is supported by illustrative examples for easy understanding. In this edition, chapters on Reinforced Soil Wall, Foundation on Reinforced Soil, and Randomly distributed reinforced soil have been substantially modified making the book more useful. The book would well serve and benefit undergraduate and postgraduate students, researchers and professional geotechnical engineers.
Author: Jonathan T. H. Wu Publisher: John Wiley & Sons ISBN: 1119375843 Category : Technology & Engineering Languages : en Pages : 414
Book Description
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.
Author: Vishal Sambaiah Dantal
Author: Vishal Sambaiah Dantal
Author: 
Author: Hoe I. Ling
Author: Christopher L. Meehan
Author: George Paaswell
Author: Dr. Suresh Kommu & Dr. SS. Asadi
Author: Phillip Soon Kang Ooi
Author: Swami Saran
Author: Jonathan T. H. Wu
Author: Ertugrul Taciroglu