Pile Driving Analysis For Pile Design And Quality Assurance
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Pile Driving Analysis For Pile Design And Quality Assurance
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Author : Rodrigo Salgado
language : en
Publisher:
Release Date : 2018-02
Pile Driving Analysis For Pile Design And Quality Assurance written by Rodrigo Salgado and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02 with categories.
Driven piles are commonly used in foundation engineering. The most accurate measurement of pile capacity is achieved from measurements made during static load tests. Static load tests, however, may be too expensive for certain projects. In these cases, indirect estimates of the pile capacity can be made through dynamic measurements. These estimates can be performed either through pile driving formulae or through analytical methods, such as the Case method.Pile driving formulae, which relate the pile set per blow to the capacity of the pile, are frequently used to determine whether the pile has achieved its design capacity. However, existing formulae have numerous shortcomings. These formulae are based on empirical observations and lack scientific validation. This report details the development of more accurate and reliable pile driving formulae developed from advanced one-dimensional FE simulations. These formulae are derived for piles installed in five typical soil profiles: a floating pile in sand, an end¿bearing pile in sand, a floating pile in clay, an end¿bearing pile in clay and a pile crossing a normally consolidated clay layer and resting on a dense sand layer. The proposed driving formulae are validated through well-documented case histories of full-scale instrumented driven piles. The proposed formulae are more accurate and reliable on average than other existing methods for the case histories considered in this study.This report also discusses the development of a pile driving control system, a fully integrated system developed by Purdue that can be used to collect, process, and analyze data to estimate the capacities of piles using the Case method and the pile driving formulae developed at Purdue.
Application Of Stress Wave Theory To Piles Quality Assurance On Land And Offshore Piling
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Author : J. Beim
language : en
Publisher: CRC Press
Release Date : 2000-01-01
Application Of Stress Wave Theory To Piles Quality Assurance On Land And Offshore Piling written by J. Beim and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-01-01 with Technology & Engineering categories.
This work collates the topics discussed in the sixth International Conference on land and offshore piling. It covers topics such as: wave mechanics and its application to pile mechanics; driving equipment and developments; and pile integrity and low strain dynamic testing.
Piling Engineering
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Author : W. G. K. Fleming
language : en
Publisher: John Wiley & Sons
Release Date : 1985-04-05
Piling Engineering written by W. G. K. Fleming and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-04-05 with Technology & Engineering categories.
A comprehensive reference guide to current principles and practices in piling. Offers engineers the best current thinking on a range of issues, methods, and techniques, including ground conditions and site preparation; pile types and systems; analysis and design methods; pile testing, quality assurance, and performance; and cost-related issues.
A Method For Accounting For Pile Setup And Relaxation In Pile Design And Quality Assurance
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Author : Prasenjit Basu
language : en
Publisher: Purdue University Press
Release Date : 2009-08-01
A Method For Accounting For Pile Setup And Relaxation In Pile Design And Quality Assurance written by Prasenjit Basu and has been published by Purdue University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-08-01 with Transportation categories.
When piles are installed by jacking or driving, they cause substantial changes in the state of soil located near the pile. These changes result from the complex loading imposed on the soil by expansion of a cylindrical cavity to make room for the pile, by multiple cycles of shearing in the vertical direction as the pile gradually moves down into the ground, and by the slow drainage associated with clayey soils. If a pile is load-tested a short time after installation, it will develop an axial resistance that reflects the existence in the soil of the excess pore pressures caused by the installation process. After the excess pore pressures dissipate, the axial pile resistance will be different from that measured in the short term. This difference is referred to as pile setup (if the resistance increases) or relaxation (if the resistance drops). This report focuses on the pile setup observed in clayey soils, in which it can be quite significant. Pile setup in clays result primarily from shaft resistance gains with time after installation because the base resistance contributes proportionally much less in soft to medium stiff clays, which are the focus of the research. Accordingly, our focus has been on analyzing setup in shaft resistance, validating the equations resulting from these analyses and then proposing design and quality assurance procedures based on the results of the analyses.
Piling Engineering Third Edition
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Author : Ken Fleming
language : en
Publisher: CRC Press
Release Date : 2008-09-23
Piling Engineering Third Edition written by Ken Fleming and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-09-23 with Technology & Engineering categories.
Piling is a fast moving field and recent years have seen major advances in theory, methods, testing procedures and equipment. Some of these changes have been driven by the need for economies and efficiency, reduced spoil production and new methods of pile bore support. Advances in theoretical analyses allow pile design to be refined so that piles and pile groups perform to better advantage. This third edition of the well established book has been comprehensively updated. It provides an accessible and well-illustrated account of design techniques, methods of testing and analysis of piles, with a marked emphasis on practice but with design methods that incorporate the most recent advances in piling theory. Piling Engineering is written for geotechnical engineers, consultants and foundation contractors. It is also a useful reference for academics and advanced students on courses in piling, practical site investigation and foundation design and construction.
Recommendations On Piling Ea Pf Hle
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Author : Geotechnik
language : en
Publisher: John Wiley & Sons
Release Date : 2013-12-09
Recommendations On Piling Ea Pf Hle written by Geotechnik and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-09 with Technology & Engineering categories.
This handbook provides a complete and detailed overview of piling systems and their application. The design and construction of piled foundations is based on Eurocode 7 and DIN 1054 edition 2010 as well as the European construction codes DIN EN 1536 (Bored piles), DIN EN 12699 (Displacement piles) and DIN EN 14199 (Micropiles). These recommendations also deal with - categorisation of piling systems, - actions on piles from structural loading, negative skin friction and side pressure, - pile resistances from static and dynamic pile test loading as well as extensive tables with the pile load-bearing capacity of nearly all piling systems based on values from practical experience, - pile groups, - performance of static and dynamic test loading and integrity tests, - load-bearing behaviour and verifications for piles under cyclical, dynamic and impact actions - quality assurance for construction. An appendix with numerous calculation examples completes the work. As part of the approval procedure for offshore wind energy structures, the Federal Office for Shipping and Hydrography (BSH) demands verifications according to the new Chapter 13 ("Load-bearing behaviour and verifications for piles under cyclical, dynamical and impact actions") of the EA Pfähle (the recommendations of the Piling working group - 2nd edition), which deals with external pile resistance for the foundations of offshore wind energy structures and the types of verifications to be provided under cyclical actions. The publication of the EA-Pfähle recommendations by the Piling working group of the German Society for Geotechnics (DGGT), which works with the same members as the piling standards committee NA 00-05-07, is intended to provide assistance for engineers active in the design, calculation and construction of piled foundations. The recommendations can thus be considered as rules of the technology and as a supplement to the available codes and standards.
The Application Of Stress Wave Theory To Piles
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Author : Jaime Alberto dos Santos
language : en
Publisher: IOS Press
Release Date : 2008
The Application Of Stress Wave Theory To Piles written by Jaime Alberto dos Santos and has been published by IOS Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.
"This volume contains 101 papers presented at the 8th International Conference on the Application of Stress Wave Theory to Piles, held in Lisbon, Portugal in 2008." "It is divided in 14 chapters according to the conference themes: Wave mechanics applied to pile engineering; Relationship between static resistance to driving and long-term static soil resistance; Case histories involving measurementand analysis of stress waves; Dynamic monitoring of driven piles; Dynamic soil-pile interaction models - numerical and physical modeling; High-strain dynamic test; Low-strain dynamic test; Rapid-load test; Monitoring and analysis of vibratory driven piles; Correlation of dynamic and static load tests; Quality assurance of deep foundations using dynamic methods; Incorporation of dynamic testing into design codes and testing standards; Ground vibrations induced by pile motions; Dynamic measurements in ground field testing." "This conference aims to contribute to a better and more efficient professional interaction between specialized contractors, designers and academicians. By joining the contribution of all of them it was possible to elucidate the today's state-of-the-art in science, technology and practice in the application of stress wave theory to piles."--BOOK JACKET.
Dynamic Pile Testing Technology
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Author : Robert Y. Liang
language : en
Publisher:
Release Date : 2007
Dynamic Pile Testing Technology written by Robert Y. Liang 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.
Driven piles are widely used as foundations to support buildings, bridges, and other structures. In 2007, AASHTO has adopted LRFD method for foundation design. The probability based LRFD approach affords the mathematical framework from which significant improvements on the design and quality control of driven piles can be achieved. In this research, reliability-based quality control criteria for driven piles are developed based on the framework of acceptance-sampling analysis for both static and dynamic test methods with the lognormal distribution characteristics. As a result, an optimum approach is suggested for the number of load tests and the required measured capacities for quality control of driven piles. Furthermore, this research has compiled a large database of pile set-up, from which the reliability-based approach of FORM is employed to develop separate resistance factors for the measured reference (initial) capacity and predicted set-up capacity. This report also provides a Bayesian theory based approach to allow for combining the information from the static pile capacity calculation and dynamic pile testing data to improve pile design process. Specifically, the results from dynamic pile tests can be utilized to reduce the uncertainties associated with static analysis methods of pile capacity by updating the corresponding resistance factors. This research has also developed one-dimensional wave equation based algorithm to interpret the High Strain Testing (HST) data for the estimation of the shaft and toe resistance of driven piles. The closed form solution is obtained for determining the Smith damping factor and the static soil resistance. Finally, a set of new wireless dynamic testing equipment (both hardware and software) is developed for more efficient dynamic pile testing.
Reliability Based Design And Quality Control Of Driven Piles
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Author : Luo Yang
language : en
Publisher:
Release Date : 2006
Reliability Based Design And Quality Control Of Driven Piles written by Luo Yang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Civil engineering categories.
"Driven piles are widely used as foundations for buildings, bridges, and other structures. Since 1994, AASHTO (American Association of State Highway and Transportation Officials) has been in process to change from ASD (Allowable Stress Design) method to LRFD (Load and Resistance Factor Design) method for foundation design. The adoption of LRFD approach makes possible the application of reliability analysis to quantify uncertainties associated with various load and resistance components, respectively. Although there exist some recommendations for incorporation of set-up into ASD and quality control methods for driven piles, most of these recommendations were developed purely based on the engineering experience with no attendant database and reliability analysis. A successful application of probability approach will definitely result in significant improvements on the design and quality control of driven piles. Therefore, there is a need to develop the quality control criterion and to improve the LRFD of driven piles in the framework of reliability-based analysis. In this study, the new reliability-based quality control criteria on driven piles are developed based on acceptance-sampling analysis for various pile test methods with lognormal statistical characteristics. An optimum approach is recommended for the selection of the number of load tests and the required measured capacities for quality control of various load test methods of driven piles. The databases containing a large number of pile testing data are compiled for piles driven into clay and into sand, respectively. Based on the compiled databases, a new methodology is developed to incorporate set-up into the LRFD of drive piles using FORM (First Order Reliability Method) where the separate resistance factors for measured reference capacity and predicted set-up capacity are derived to account for different degrees of uncertainties associated with these two capacity components. Based on Bayesian theory, a new methodology is developed to optimize the LRFD of driven piles by combining the results from static calculation and dynamic pile testing. Specifically, the results from dynamic pile tests are incorporated to reduce the uncertainties associated with static analysis methods by updating the resistance factors in LRFD. Finally, a new one-dimensional wave equation based algorithm to interpret High Strain Testing data for estimation of resistances of driven piles is proposed."--abstract.
A Study Of Capacity Predictions For Driven Piles By Dynamic Pile Testing
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Author : Man-Kie Wong
language : en
Publisher: Open Dissertation Press
Release Date : 2017-01-27
A Study Of Capacity Predictions For Driven Piles By Dynamic Pile Testing written by Man-Kie Wong 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, "A Study of Capacity Predictions for Driven Piles by Dynamic Pile Testing" by Man-kie, Wong, 黃文基, 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 A Study of Capacity Predictions for Driven Piles by Dynamic Pile Testing submitted by Wong Man Kie for the degree of Doctor of Philosophy at the University of Hong Kong October 2006 The ban on the use of diesel hammers for percussive piling works and the introduction of hydraulic hammers in Hong Kong in the mid-1990s have brought unsettling times for the local construction industry. In recent years it has not been unusual to find that the measured set and the temporary compression of piles at final set are beyond the range of the set table of the Hiley Formula. A lack of local expertise in using hydraulic hammers and the absence of an approved pile-driving criterion specifically for the use of this new tool are to blame. Some engineers have responded by imposing more stringent requirements on the pile capacity acceptance test than may be necessary, resulting in over-driven piles and associated damage. To resolve such problems, a pile-driving criterion that is practical and generally applicable to all types of piles is called for. Findings from extensive research overseas has established the general value of Dynamic Pile Testing in assessing pile capacity. Such testing involves the combined use of data collected by Pile Driving Analyzer (PDA) and the analytical tool known as Case Pile Wave Analysis Program (CAPWAP). In Hong Kong, there is considerable scope for the wider use of Dynamic Pile Testing. This thesis reports the results of an in-depth study undertaken to confirm the suitability and potential benefits of such testing under local soil conditions. The test piles selected for this study are those typically used locally. A total of 420 Grade 55C steel H-piles driven by hydraulic hammers between 2002 and 2005 were selected from 22 different projects across the territory with different sub-soil conditions. Between 20m and 60m in length, the test piles are representative of the range commonly found in local construction projects. The results from static load tests were used in this study as a benchmark, and compared to the pile capacity predictions derived from several tools (PDA, CAPWAP, the Hiley Formula and the Modified Hiley Formula) with a view to recommending a reliable and practical method for assessing pile capacity. The study results demonstrated that the CAPWAP method can predict the Davisson limit load accurately. Despite the strong predictive power of CAPWAP analysis, we need for field control purposes a dynamic formula that is reliable and yet more practicable in terms of time and cost. The results of the study show that by calibrating the Hiley Formula with the efficiency of the hammer drop, E, and the coefficient of restitution of the hammer cushion, e, derived from CAPWAP analyses, pile capacity predictions can be made that are close to the CAPWAP predictions and the static load test results. To conclude, the present study has clearly established that PDA, CAPWAP and the "calibrated" Hiley Formula are effective tools for pile capacity assessment and quality control of piling works in Hong Kong. Cost-effective and practical, their combined use would contribute significantly to the overall quality and efficiency of pile driving, thus inducing greater confidence locally in Dynamic Pile Testing. DOI: 10.5353/th_b3710612 Subjects: Piling (Civil engineering) - Testing