Download or read book Load Tests on Stone Columns written by DA. Greenwood and published by . This book was released on 1991 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stone column foundations are often incorrectly regarded as piles and tested accordingly. For single columns load tests are appropriate. However full scale field tests in which stresses on and between columns were measured clearly demonstrate how the performance of columns under widespread loads depends on loading circumstances which cannot be simulated by small scale tests on single columns. Such tests are misleading for contract purposes. A more cost effective approach is to concentrate on high grade site investigation and control during design and construction; supplemented by instrumentation to monitor response to initial loading of the prototype.
Download or read book Analysis of Quick Load Tests on Stone Columns written by JI. Baez and published by . This book was released on 1991 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper examines 6 stone column projects constructed throughout the United States from 1985 to 1988 in which quick vertical load tests were performed to predict performance of foundations and to compare this prediction with the design prediction. The stone columns were constructed through various types of soil including sand, clay, silt, peat and construction debris. The configuration of the load tests varied from .76 m (30 inch) diameter to 1.8 m (6 foot) square steel plates with loads from 89 kN to 916 kN (10 to 103 tons) on one to four stone columns.
Download or read book Shear Load Tests on Stone Columns With and Without Geosynthetic Encasement written by S. Murugesan and published by . This book was released on 2009 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of stone columns (otherwise called granular piles) has proved to be an economical and technically viable ground improvement technique for construction on soft clay soils. Though the stone columns are designed to carry vertical compressive loads, soil movements occurring in the field conditions may cause shear deformations in the stone columns. The stone columns, particularly installed in very soft soils, may not be able to resist these shear movements because of the low confinement offered by the surrounding soil. The shear load capacity of such stone columns can be significantly improved by encasing the individual stone columns with suitable geosynthetic. The encasement confines the aggregate and makes the stone column act like a semirigid pile; thus leading to increased shear stiffness of the column. This paper discusses some laboratory model tests performed to investigate the shear load capacity of stone columns with and without geosynthetic encasement. The laboratory tests were performed by inducing lateral soil movements in a stone column treated soft soil. The results have shown qualitative improvement in the shear stiffness of the stone column due to geosynthetic encasement.
Download or read book Deep Foundation Improvements written by Melvin I. Esrig and published by ASTM International. This book was released on 1991 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty-two papers from a symposium (on title), held in Las Vegas, January 1990, focus on deep foundation improvements through the formation of composite ground, and those related to improvement through compaction and densification. Annotation copyright Book News, Inc. Portland, Or.
Download or read book Specifications for Constructing and Load Testing Stone Columns in Clays written by TD. Stark and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this paper is to provide guidelines for writing a performance specification for the construction and load testing of stone columns in cohesive soils. Specifications from five different sources, three specialty contractors and two agencies, were studied to develop the guidelines described herein. The two primary components of a performance specification are the performance criteria for the stone column foundation and the load testing procedures used to verify that the desired ground improvement has been achieved.
Download or read book Selected Geotechnical Papers of James K Mitchell written by James K. Mitchell and published by ASCE Publications. This book was released on 2001-01-01 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sponsored by the Geo-Institute of ASCE. This collections contains 35 key papers by James K. Mitchell during his extraordinary career as a geotechnical engineer.Ø In addition to teaching, Mitchell's career encompassed geotechnical projects ranging from research on hazardous waste landfill stability at Kettleman Hills in California, to lunar soil analysis for NASA Apollo Missions, to working with the Mayor of San Francisco following the 1989 Loma Prieta Earthquake. He was elected to the National Academy of Engineering and the National Academy of Science. Topics include: experimental and analytic studies of soil behavior related to geotechnical and geo-environmental problems; soil improvement and ground reinforcement, physicochemical phenomena in soils, the stress-strain time behavior of soils, in situ measurement of soil properties, and mitigation of ground failure risk during earthquakes. ASCE's Engineering Classics series presents selected papers of lasting importance by eminent engineers who have made outstanding contributions to their field.
Download or read book Geosynthetic Encased Columns for Soft Soil Improvement written by Márcio Almeida and published by CRC Press. This book was released on 2018-10-10 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The geosynthetic encased column (GEC) is a relatively recent method developed for soft soil improvement. The method was firstly introduced as a concept in the 1980s and first practical applications started in the 1990s. GECs have been widely used in some parts of the world for the last three decades. However, there is no book in the literature summarizing the knowledge accumulated during this period in relation to this soft ground improvement technique. The purpose of this book is to provide readers with the GEC fundamentals and practical applications. Chapter 1 presents the general principles of this ground improvement technique including the methods used for GEC installation and how the material properties may be selected. Chapter 2 presents the design methods, thus settlement calculations by means of analytical methods and stability calculations by limit equilibrium methods are explained in detail. Chapter 3 presents calculation examples illustrating the usual steps to be done for both service limit state and ultimate limit state designs. Then field performances exemplifying practical applications of the GEC technique are presented in Chapter 4 for some case histories. Following numerical analyses, often used in design to complement analytical methods, are presented in Chapter 5. Annexes I and II at the end contain the charts developed to perform settlement calculations. The book combines the experiences of four authors with different academic and industry backgrounds to describe GEC design and performance. It is aimed at civil engineers in general, particularly geotechnical engineers, either working in design or in practice, at graduate students, and at senior undergraduate students.
Download or read book Design and Construction of Stone Columns written by Richard D. Barksdale and published by . This book was released on 1983 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Stone columns have been used since the 1950's as a technique for improving both cohesive soils and silty sands. Potential applications include (1) stabilizing foundation soils to support embankments and approach fills, (2), supporting retaining structures (including Reinforced Earth), bridge bent and abutment structures on slightly marginal soft to stiff clays and loose silty sands, (3) landslide stabilization and (4) reducing liquefaction potential of clean sands. Also, stone columns under proper conditions can greatly decrease the time required for primary consolidation. The report describes construction, field inspection, and design aspects of stone columns. Also, several case histories are described. Bearing capacity, settlement and stability design examples are given in the appendixes contained in Volume II, (FHWA/RD-83/027) as follows: Appendix A - Selected Contacts for Stone Columns, Appendix B - Local Bearing Failure of an Isolated Stone Column, Appendix C - Example Bearing Capacity Problems, Appendix D - Example Settlement Problems, Appendix E - Example Stability Problem, Appendix F - Rammed Franki Stone and Sand Columns"--Technical report documentation page.
Download or read book Structural Foundations Manual for Low Rise Buildings written by Michael Atkinson and published by CRC Press. This book was released on 2020-11-26 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides practical and buildable solutions for the design of foundations for housing and other low-rise buildings, especially those on abnormal or poor ground. A wealth of expert information and advice is brought together dealing with the key aspects a designer must consider in order to achieve effective and economic foundation designs. This second edition of Structural Foundations Manual for Low-Rise Buildings has been completely updated in line with the new government guidelines on contaminated land and brown-field sites. The book includes well-detailed design solutions and calculations, actual case histories, illustrations, design charts and check lists, making it a user-friendly reference for contractors, structural engineers, architects and students who have to deal with foundations for low-rise buildings on sites with difficult ground conditions.
Download or read book Influence of smear and compaction zones on the performance of stone columns in lacustrine clay written by Jean Nicolas François-Xavier Gautray and published by vdf Hochschulverlag AG. This book was released on 2019-02-20 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Construction on soft soils is always accompanied by the risk of significant, time-dependent settlement and bearing capacity failure. As technical knowledge has advanced, optimised ground improvement has offered significant economic advantages in reducing net settlement and resisting failure by installation of more flexible and cost-effective stone columns or sand compaction piles in the ground, rather than more rigid inclusions such as steel or concrete piles. The stiffness and strength of the subsoil around the columns is greater, and the consolidation time is reduced through shorter (radial) drainage paths.
Download or read book The Use Testing and Performance of Vibrated Stone Columns in the United Kingdom written by JA. Charles and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibrated stone column ground improvement techniques are being used extensively for low rise housing and light industrial units in the United Kingdom. Much of the work is on filled sites. There is a need for simple and inexpensive forms of testing. The advantages and limitations of different types of in situ tests are considered. A brief account is given of field studies to evaluate the effectiveness of vibrated stone columns at two sites with different ground conditions.
Download or read book Geosynthetics in Civil and Environmental Engineering written by Guang-xin Li and published by Springer Science & Business Media. This book was released on 2009-03-07 with total page 875 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Soft Soil Engineering written by Dave H. Chan and published by CRC Press. This book was released on 2006-09-28 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soft soils present particular challenges to engineers and an understanding of the specific characteristics of these soils is indispensable. Laboratory techniques such as numerical modelling, theoretical analysis and constitutive modelling give new insights into soft soil material behaviour, while large-scale testing in the field provides important information in areas such as slope stability and soft soil improvements. This collection of papers from the Fourth International Conference on Soft Soil Engineering, Vancouver, 2006, presents an international appraisal of current research and new advances in engineering practices, illustrating the theory with relevant case studies. Geotechnical professionals, engineers, academics and researchers working in the areas of soft ground engineering and soft soil engineering will find this a valuable book.
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.
Download or read book Ground Improvement Geosystems written by Michael C. R. Davies and published by Thomas Telford. This book was released on 1997 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers presented in this volume describe the latest developments from around the world on ground improvement by densification and reinforcement. They describe new research into improving the understanding of the problems facing geotechnical engineers working in the field of ground improvement and the advances in the techniques available to them. Numerous case studies show how new and improved methods have actually been applied over a wide variety of ground conditions.
Download or read book Geotechnics of Soft Soils Focus on Ground Improvement written by Minna Karstunen and published by CRC Press. This book was released on 2008-08-25 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural soft soils are very complex materials. As construction activities increasingly take place in poor ground conditions, ground improvement is often required. However, design practices for ground improvement were for long at best crude and conservative, and at worst unsafe. Although new construction and field observation techniques have been de
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.
