Bearing Capacity of Improved Ground by Sand Compaction Piles PDF Download
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Author: M. Kitazume
Publisher:
ISBN:
Category : Bearing capacity
Languages : en
Pages : 15
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Book Description
Bearing capacity of the ground improved by sand compaction pile method is investigated primarily by a series of centrifuge model tests. Bearing capacities obtained under the various loading conditions are well explained by the simple stability analysis which has been commonly employed in Japan. The effectiveness of a simple construction control diagram is confirmed based on the deformation of the ground. These findings are also verified by the full scale load test leading to failure of the improved ground.
Author: M. Kitazume
Publisher:
ISBN:
Category : Bearing capacity
Languages : en
Pages : 15
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Book Description
Bearing capacity of the ground improved by sand compaction pile method is investigated primarily by a series of centrifuge model tests. Bearing capacities obtained under the various loading conditions are well explained by the simple stability analysis which has been commonly employed in Japan. The effectiveness of a simple construction control diagram is confirmed based on the deformation of the ground. These findings are also verified by the full scale load test leading to failure of the improved ground.
Author: Masaki Kitazume
Publisher: CRC Press
ISBN: 9781439824696
Category : Technology & Engineering
Languages : en
Pages : 254
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Book Description
The Sand Compaction Pile or (SCP) method is used frequently in construction to form compacted sand piles by vibration, dynamic impact or static excitation in soft ground. Originally developed in Japan to improve stability or compressibility and to prevent liquefaction failure in loose sand, the SCP method is now often applied to soft clay ground to ensure stability and reduce ground settlement. This book presents detailed descriptions of design, execution, quality control, equipment and assurance aspects of the SCP method, illustrating the theory with case studies from around Japan and also including a thorough overview of the existing literature on research and development carried out since the 1950s. Two final chapters cover vital aspects of design procedures for clay and sandy ground to enable practitioners to frame an appropriate set of parameters for durable and cost-efficient design.
Author: Melvin I. Esrig
Publisher: ASTM International
ISBN: 0803113927
Category : Columns
Languages : en
Pages : 344
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Book Description
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.
Author: Richard D. Barksdale
Publisher:
ISBN:
Category : Compacting
Languages : en
Pages : 62
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Book Description
Sand compaction piles can be used to improve marginal sites for stability, liquefaction, and settlement applications. They have been employed extensively in Japan for many years to improve land reclaimed from the sea. The advantages and disadvantages of using sand compaction piles are compared with other vibro-compaction techniques such as stone columns. Methods are described for construction of sand compaction piles on land and over water. Design theories are given for the utilization of sand compaction piles at sites underlain by both cohesionless and cohesive soils. For sites underlain by cohesionless sands, procedures are presented for estimating the increase in standard penetration resistance in both the sand compaction pile and the surrounding sand. Techniques are described for estimating stability and one-dimensional consolidation settlement of sites underlain by cohesive soils that have been improved with sand compaction piles. Finally, typical applications of sand compaction piles are described, and practical design criteria and practices are given.
Author: Professor Jian Chu
Publisher: Elsevier
ISBN: 0080457363
Category : Science
Languages : en
Pages : 1137
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Book Description
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: Michael C. R. Davies
Publisher: Thomas Telford
ISBN: 9780727726056
Category : Technology & Engineering
Languages : en
Pages : 514
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Book Description
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.
Author: Yan-ning Wang
Publisher:
ISBN:
Category : Soil compaction
Languages : en
Pages : 18
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Book Description
The sand compaction pile (SCP) method is a widely used ground improvement technique, especially in offshore engineering. The thick, soft marine clay in Hong Kong-Zhuhai-Macau Bridge was reinforced using this method at its island-tunnel conversion area. A large-scale plate loading test was conducted to evaluate the bearing capacity and deformability of the SCP composite ground. An improved settlement result was obtained by utilizing a high-sensitivity liquid level sensor system underwater. The research results showed that the stress concentration ratio of the SCP composite ground was closely related to the load level, which decreased when the load level increased. When the stress stayed constant, the ratio was found to reduce gradually to a certain value. Three computing theories were discussed in the bearing capacity calculation of the SCP composite ground. The results calculated by the Hughes and Withers method were more consistent with the field experimental results. For the settlement calculation, it was found that the results were closer to the experiment results calculated by Aboshi's first empirical formula. The experiment results differed greatly when calculated by Aboshi's second empirical formula and the modified method proposed by Ahn and Kim. The study may provide some useful data for marine SCP composite ground designs and underwater field testing techniques.
Author: Hidenori Takahashi
Publisher: CRC Press
ISBN: 1000892697
Category : Technology & Engineering
Languages : en
Pages : 192
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Book Description
This practical guide covers the investigation, design, and execution of ground improvement in coastal areas. It explains how to decide whether ground improvement is necessary, which method to choose, and how to design and execute it. Recognising the soft ground commonly found in coastal areas, the book introduces various ground improvement technologies including seismic reinforcement and liquefaction countermeasures and addresses the measures to be taken to sustain ground against external forces. Reliable Japanese ground improvement technologies are presented as well as the latest Building Information Modelling (BIM/Information and Communication Technology (ICT) used in their execution. The book also includes measures that can be taken against contaminated soil and considers ground improvement design on site. Unique focus on coastal applications Summarises leading edge Japanese practice The book suits professionals in the ground improvement industry, especially geotechnical designers and contractors.
Author: Jean Nicolas François-Xavier Gautray
Publisher:
ISBN: 9783728137982
Category : Science
Languages : en
Pages : 0
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Book Description
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.
Author: Klaus Kirsch
Publisher: CRC Press
ISBN: 1315355094
Category : Technology & Engineering
Languages : en
Pages : 207
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Book Description
Vibro compaction and vibro stone columns are the two dynamic methods of soil improvement most commonly used worldwide. These methods have been developed over almost eighty years and are now of unrivalled importance as modern foundation measures. Vibro compaction works on granular soils by densification, and vibro stone columns are used to displace and reinforce fine-grained and cohesive soils by introducing inert material. This second edition includes also a chapter on vibro concrete columns constructed with almost identical depth vibrators. These small diameter concrete piles are increasingly used as ground improvement methods for moderately loaded large spread foundations, although the original soil characteristics are only marginally improved. This practical guide for professional geotechnical engineers and graduate students systematically covers the theoretical basis and design principles behind the methods, the equipment used during their execution, and state of the art procedures for quality assurance and data acquisition. All the chapters are updated in line with recent developments and improvements in the methods and equipment. Fresh case studies from around the world illustrate the wide range of possible applications. The book concludes with variations to methods, evaluates the economic and environmental benefits of the methods, and gives contractual guidance. The Open Access version of this book, available at http://www.taylorfrancis.com, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license
