Termination Criteria For High Capacity Jacked And Driven Steel H Pilesin Hong Kong
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Termination Criteria For High Capacity Jacked And Driven Steel H Pilesin Hong Kong
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Author : Joley Lam
language : en
Publisher: Open Dissertation Press
Release Date : 2017-01-27
Termination Criteria For High Capacity Jacked And Driven Steel H Pilesin Hong Kong written by Joley Lam and has been published by Open Dissertation Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-27 with categories.
This dissertation, "Termination Criteria for High-capacity Jacked and Driven Steel H-pilesin Hong Kong" by Joley, Lam, 林早妮, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled Termination Criteria for High-capacity Jacked and Driven Steel H-piles in Hong Kong Submitted by Joley Lam for the degree of Doctor of Philosophy at The University of Hong Kong in June 2007 In recent years, steel H-piles with high yield strength have routinely been used in Hong Kong in foundation systems, but well-accepted installation procedures have yet to be developed for jacked and driven steel H-piles. Jacked piling was recently introduced into Hong Kong with no well-established termination criteria, and many construction problems have yet to be resolved. Field measurements indicate that pile buckling is caused by loss of lateral constraint after deep voids have been formed on both sides of the webs of H-piles. To address this problem, an analytical method has been developed for assessing the critical depth of void at which pile buckling may occur. A sand filling technique has also been developed to limit the void depth and hence prevent buckling of the jacked H-piles. A systematic study has been made to investigate the settlement behaviour of high-capacity jacked H-piles under various loading conditions in order to develop termination criteria for the piles to meet the stringent residual settlement limit for loading test in Hong Kong. The results indicate that preloading the piles by a load equal to 2.3 to 2.4 times the design working capacity (WL) for about half an hour during installation can effectively reduce the creep settlement of jacked piles installed in weathered granites, and hence reduce the residual settlement that would occur after completion of the loading test to a value small enough to meet the acceptance criterion. This is called "pre-creeping" in the thesis. It is also demonstrated that repeated jacking is needed during pile installation to avoid sudden and large pile settlement when the installed pile is subsequently reloaded during loading test or construction of superstructure. For the driven H-piles, the termination criteria established decades ago are incompatible with the advanced pile driving equipment and the pile acceptance criteria adopted nowadays, creating many pile driving problems in Hong Kong. Extensive PDA tests have been conducted to verify that the existing applicable range of the allowable set of 25 to 50 mm per 10 blows is of little use in controlling pile driving stress. The results indicate that piles with C + C values (in millimetre) p q greater than 1.2 times pile length L (in metre) are susceptible to high driving stress. A simple rule for controlling pile driving stress was therefore developed by limiting the C + C values of piles to below 1.2 L. p q It is proposed to adopt the energy approach formula, which uses the impact energy determined by PDA tests to address the limitations of the Hiley formula for calculating the final set table for driven piles in Hong Kong. The energy capacity predictions are reasonably accurate, as confirmed by loading test data from various sites in Hong Kong. Local contractors usually drive the piles to a very small final set to ensure that the installed piles will meet the stringent residual settlement limit. An analysis of the local load test data indicates that piles should achieve a predicted capacity of at least 2.3 to 2.8WL to achieve desirable results. This provides a practical rule for
Termination Criteria For High Capacity Jacked And Driven Steel H Piles In Hong Kong
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Author :
language : en
Publisher:
Release Date : 2007
Termination Criteria For High Capacity Jacked And Driven Steel H Piles In Hong Kong written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Termination Criteria For High Capacity Jacked And Driven Steel H Piles In Hong Kong
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Author : Joley Lam
language : en
Publisher:
Release Date : 2007
Termination Criteria For High Capacity Jacked And Driven Steel H Piles In Hong Kong written by Joley Lam and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Piling (Civil engineering) categories.
The Engineering Of Foundations Slopes And Retaining Structures
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Author : Rodrigo Salgado
language : en
Publisher: CRC Press
Release Date : 2022-06-01
The Engineering Of Foundations Slopes And Retaining Structures written by Rodrigo Salgado and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-06-01 with Technology & Engineering categories.
The Engineering of Foundations, Slopes and Retaining Structures rigorously covers the construction, analysis, and design of shallow and deep foundations, as well as retaining structures and slopes. It includes complete coverage of soil mechanics and site investigations. This new edition is a well-designed balance of theory and practice, emphasizing conceptual understanding and design applications. It contains illustrations, applications, and hands-on examples that continue across chapters. Soil mechanics is examined with full explanation of drained versus undrained loading, friction and dilatancy as sources of shear strength, phase transformation, development of peak effective stress ratios, and critical-state and residual shear strength. The design and execution of site investigations is evaluated with complete discussion of the CPT and SPT. Additional topics include the construction, settlement and bearing capacity of shallow foundations, as well as the installation, ultimate resistance and settlement of deep foundations. Both traditional knowledge and methods and approaches based on recent progress are available. Analysis and design of retaining structures and slopes, such as the use of slope stability software stability calculations, is included. The book is ideal for advanced undergraduate students, graduate students and practicing engineers and researchers.
The Structural Engineer
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Author :
language : en
Publisher:
Release Date : 2004
The Structural Engineer written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Concrete construction categories.
G Otechnique
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Author :
language : en
Publisher:
Release Date : 2009
G Otechnique written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Engineering geology categories.
Advances In Deep Foundations
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Author : Yoshiaki Kikuchi
language : en
Publisher: Taylor & Francis
Release Date : 2007-06-21
Advances In Deep Foundations written by Yoshiaki Kikuchi and has been published by Taylor & Francis this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-06-21 with Technology & Engineering categories.
Civil Engineering has recently seen enormous progress in the core field of the construction of deep foundations. This book is the result of the International Workshop on Recent Advances in Deep Foundations (IWDPF07), which was held in Yokosuka, Japan from the 1st to the 2nd of February, 2007. Topics under discussion in this book include recent rese
Full Scale Testing And Foundation Design
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Author : Mohamad H. Hussein
language : en
Publisher:
Release Date : 2012
Full Scale Testing And Foundation Design written by Mohamad H. Hussein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Foundations categories.
GSP 227 contains 51 papers on the use of full-scale testing to enhance the design of foundations presented in honor of Bengt H. Fellenius.
Basics Of Foundation Design
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Author : Bengt Fellenius
language : en
Publisher: Lulu.com
Release Date : 2017-03-17
Basics Of Foundation Design written by Bengt Fellenius and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-03-17 with Technology & Engineering categories.
The "Red Book" presents a background to conventional foundation analysis and design. The text is not intended to replace the much more comprehensive 'standard' textbooks, but rather to support and augment these in a few important areas, supplying methods applicable to practical cases handled daily by practising engineers and providing the basic soil mechanics background to those methods. It concentrates on the static design for stationary foundation conditions. Although the topic is far from exhaustively treated, it does intend to present most of the basic material needed for a practising engineer involved in routine geotechnical design, as well as provide the tools for an engineering student to approach and solve common geotechnical design problems.
Pile Design And Construction Practice
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Author : Willis H. Thomas
language : en
Publisher: CRC Press
Release Date : 2007-12-06
Pile Design And Construction Practice written by Willis H. Thomas and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-12-06 with Technology & Engineering categories.
This international handbook is essential for geotechnical engineers and engineering geologists responsible for designing and constructing piled foundations. It explains general principles and practice and details current types of pile, piling equipment and methods. It includes calculations of the resistance of piles to compressive loads, pile group