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Variable Penetration Rate Cone Testing For Liquefaction Evaluation Of Sands With Fines
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Book Synopsis Variable Penetration Rate Cone Testing for Liquefaction Evaluation of Sands with Fines by : Christopher Phillip Krage
Download or read book Variable Penetration Rate Cone Testing for Liquefaction Evaluation of Sands with Fines written by Christopher Phillip Krage and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of in-situ based relationships for liquefaction potential evaluation (e.g. SPT N160, CPT q(c1N)) can have significant implications on earthquake hazard assessment; shifts in q(c1N) can affect estimates of liquefaction potential, and can result in either significant human and infrastructure risk or excessive conservatism and fiscal waste. While most current discussions/debates focus on relationships for clean sand, the uncertainty (and associated risk) increases significantly when fines are present. Review of CRR-q(c1N) curves for 15% and 35% fines content levels reveals that the curves proposed by researchers vary widely. These trends are driven by case history databases and understanding of the physical framework to explain the observed trends is not well developed. Recent research from laboratory studies and numerical models of cone penetration in sand with fines indicates the differences in drained and undrained q(c1N) values vary for different levels of fines content and in-situ state. At the standard cone penetration rate of 2 cm/s drained conditions do not exist with increasing fines content; excess pore pressures are generated and partially drained conditions exist. The use of a CRR-q(c1N_drained) relationship may reduce uncertainty in cone measurements inherent in partially drained penetration and better account for the presence of fines in liquefaction evaluation. Variable penetration rate cone testing provides a framework to quantify the effects of partial drainage on cone tip and pore pressure measurements. Controlled penetration rates from 0.002-20 cm/s are used to establish drained conditions to compare with standard rate cone soundings. This study investigated the effect of fines content and drainage behavior on cone measurements in natural, liquefiable soil deposits. Investigation of this behavior provided insight as to the effect of fines content on CRR-q(c1N) correlations. This study is also used to provide an initial reassessment of clean sand corrections currently used in practice; improved understanding of the linkage between fines content and tip resistance may reduce the risk and uncertainty in estimating the liquefaction potential of sands with fines. The use of variable penetration rate cone testing is shown to be a valuable tool for understanding the extent of this linkage. Several factors are shown to play a significant role in field tests, including: fines content, drainage condition, geologic depositional process, spatial variability, initial state, liquefaction history, and ground water level.
Book Synopsis Numerical and Experimental Study on Cone Penetration in Sands and Intermediate Soils by : Robert Andrew Jaeger
Download or read book Numerical and Experimental Study on Cone Penetration in Sands and Intermediate Soils written by Robert Andrew Jaeger and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed examination of cone penetration testing in sands, clays, and intermediate soils (silty-sands, silts, clayey-sands, etc.) is presented. Effects of drainage condition on cone penetration testing in intermediate soils are evaluated through centrifuge experiments and numerical modeling of cone penetration as a cavity expansion process. A modified version of the MIT-S1 model is presented and its implementation into the commercial program FLAC (Itasca) is discussed and verified. Frameworks for estimating drained and undrained penetration resistances from cylindrical cavity expansion analyses with the modified MIT-S1 model are then presented and verified against available experimental data. These frameworks are subsequently used to evaluate a state-normalization of cone penetration resistances in sands with fines. Clean sand corrections in terms of the state parameter are presented and the effects of initial state parameter and drainage condition on these correction factors are evaluated. Finally, liquefaction triggering curves of sands with fines are developed and compared to previously published relationships.
Book Synopsis Cone Penetration Testing for Evaluating the Liquefaction Potential of Sands by : Robert R. Carter
Download or read book Cone Penetration Testing for Evaluating the Liquefaction Potential of Sands written by Robert R. Carter and published by . This book was released on 1988 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Feasibility of Using Wissa-type Piezometer Probe to Identify Liquefaction Potential of Saturated Fine Sands by : John H. Schmertmann
Download or read book Study of Feasibility of Using Wissa-type Piezometer Probe to Identify Liquefaction Potential of Saturated Fine Sands written by John H. Schmertmann and published by . This book was released on 1978 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cone Penetration Testing by : Paul W. Mayne
Download or read book Cone Penetration Testing written by Paul W. Mayne and published by Transportation Research Board. This book was released on 2007 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: NCHRP synthesis 368 explores the current practices of departments of transportation associated with cone penetration testing (CPT). The report examines cone penetrometer equipment options; field testing procedures; CPT data presentation and geostratigraphic profiling; CPT evaluation of soil engineering parameters and properties; CPT for deep foundations, pilings, shallow foundations, and embankments; and CPT use in ground modifications and difficult ground conditions.
Book Synopsis Evaluation of Liquefaction Potential of Silty Sand Based on Cone Penetration Test by : Paulus P. Rahardjo
Download or read book Evaluation of Liquefaction Potential of Silty Sand Based on Cone Penetration Test written by Paulus P. Rahardjo and published by . This book was released on 1988 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cone Penetration Testing for Seismic Ground Hazards Evaluation in Mid-America by : Paul W. Mayne
Download or read book Cone Penetration Testing for Seismic Ground Hazards Evaluation in Mid-America written by Paul W. Mayne and published by . This book was released on 2002 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cone Penetration Testing 2018 by : Michael A. Hicks
Download or read book Cone Penetration Testing 2018 written by Michael A. Hicks and published by CRC Press. This book was released on 2018-06-13 with total page 757 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cone Penetration Testing 2018 contains the proceedings of the 4th International Symposium on Cone Penetration Testing (CPT’18, Delft, The Netherlands, 21-22 June 2018), and presents the latest developments relating to the use of cone penetration testing in geotechnical engineering. It focuses on the solution of geotechnical challenges using the cone penetration test (CPT), CPT add-on measurements and companion in-situ penetration tools (such as full flow and free fall penetrometers), with an emphasis on practical experience and application of research findings. The peer-reviewed papers have been authored by academics, researchers and practitioners from many countries worldwide and cover numerous important aspects, ranging from the development of innovative theoretical and numerical methods of interpretation, to real field applications. This is an Open Access ebook, and can be found on www.taylorfrancis.com.
Book Synopsis Soil Testing, Soil Stability and Ground Improvement by : Wissem Frikha
Download or read book Soil Testing, Soil Stability and Ground Improvement written by Wissem Frikha and published by Springer. This book was released on 2017-07-11 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthwork projects are critical components in civil construction and often require detailed management techniques and unique solution methods to address failures. Being earth bound, earthwork is influenced by geomaterial properties at the onset of a project. Hence, an understanding of the in-situ soil properties is essential. Slope stability is a common problem facing earthwork construction, such as excavations and shored structures. Analytical methods for slope stability remain critical for researchers due to the mechanical complexity of the system. Striving for better earthwork project managements, the geotechnical engineering community continues to find improved testing techniques for determining sensitive properties of soil and rock, including stress-wave based, non-destructive testing methods. To minimize failure during earthwork construction, past case studies and data may reveal useful lessons and information to improve project management and minimize economic losses. This volume is part of the proceedings of the 1st GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2017.
Book Synopsis Implementation of Variable Rate Cone Penetration Testing by : Douglas Aaron James Wahl
Download or read book Implementation of Variable Rate Cone Penetration Testing written by Douglas Aaron James Wahl and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cone Penetration Testing (CPT) is typically conducted in the United States according to ASTM Standard 5778-07 (2007). This standard specifies that the rate of penetration during testing must be 2.0 ± 0.5 cm/s for electronic cones. While this standard has served to establish a reference condition that is easily implemented and has well known correlations for evaluating soil behavior and properties, it does not allow for evaluation of the effects of penetration rate variation. Controlled variation of the cone penetration rate can provide additional information about the subsurface (e.g. estimates of drained or undrained strength or hydraulic conductivity) by directly manipulating soil drainage conditions during penetration. The use of varying penetration rates has been investigated in the laboratory and theoretically using analytical methods, but relatively little field testing has been completed with significant variations from the standard rate. A variable penetration rate cone testing (VPRCPT) field system capable of varying penetration rates over a range of 0.002 cm/s to 20 cm/s (four orders of magnitude) and maintaining precise and accurate penetration rate control was developed. The key components enabling performance over this range were high quality proportional hydraulic valves coupled with an electronic motion controller. The system has been tested in the laboratory under controlled conditions and at field locations described in this thesis. The results of field testing confirm the trends identified previously and indicate potential benefits of using controlled penetration rate variation to provide further information for interpretation of soil properties and classification.
Book Synopsis Cone Penetration Testing by : A. C. Meigh
Download or read book Cone Penetration Testing written by A. C. Meigh and published by Elsevier. This book was released on 2013-10-22 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cone Penetration Testing: Methods and Interpretation discusses the history, applications, and development of the cone penetration test procedures and related test procedures. The book is divided into two parts. Part 1 deals with the cone penetration test proper – its general and historical outline, equipment and their accuracy and calibration, the use of the test results, and its parameters in different kinds of soils and materials. Part 2 covers the role and use of piezocones and its use for the assessment of soil. The text is recommended for engineers and geologists who would like to know more about the applications of the pressuremeter and the interpretation of its results.
Book Synopsis Soil Liquefaction by : Michael Jefferies
Download or read book Soil Liquefaction written by Michael Jefferies and published by CRC Press. This book was released on 2006-09-04 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil liquefaction is a major concern in areas of the world subject to seismic activity or other repeated vibration loads. This book brings together a large body of information on the topic, and presents it within a unified and simple framework. The result is a book which will provide the practising civil engineer with a very sound understanding of
Book Synopsis Cone Penetration Testing 2022 by : Guido Gottardi
Download or read book Cone Penetration Testing 2022 written by Guido Gottardi and published by CRC Press. This book was released on 2022-06-24 with total page 2767 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the 5th International Symposium on Cone Penetration Testing (CPT’22), held in Bologna, Italy, 8-10 June 2022. More than 500 authors - academics, researchers, practitioners and manufacturers – contributed to the peer-reviewed papers included in this book, which includes three keynote lectures, four invited lectures and 169 technical papers. The contributions provide a full picture of the current knowledge and major trends in CPT research and development, with respect to innovations in instrumentation, latest advances in data interpretation, and emerging fields of CPT application. The paper topics encompass three well-established topic categories typically addressed in CPT events: - Equipment and Procedures - Data Interpretation - Applications. Emphasis is placed on the use of statistical approaches and innovative numerical strategies for CPT data interpretation, liquefaction studies, application of CPT to offshore engineering, comparative studies between CPT and other in-situ tests. Cone Penetration Testing 2022 contains a wealth of information that could be useful for researchers, practitioners and all those working in the broad and dynamic field of cone penetration testing.
Book Synopsis Cone Penetration Testing in Geotechnical Practice by : T. Lunne
Download or read book Cone Penetration Testing in Geotechnical Practice written by T. Lunne and published by CRC Press. This book was released on 2002-09-11 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides guidance on the specification, performance, use and interpretation of the Electric Cone Penetration Test (CPU), and in particular the Cone Penetration Test with pore pressure measurement (CPTU) commonly referred to as the "piezocone test".
Book Synopsis Soil Behaviour and Critical State Soil Mechanics by : David Muir Wood
Download or read book Soil Behaviour and Critical State Soil Mechanics written by David Muir Wood and published by Cambridge University Press. This book was released on 1991-04-26 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soils can rarely be described as ideally elastic or perfectly plastic and yet simple elastic and plastic models form the basis for the most traditional geotechnical engineering calculations. With the advent of cheap powerful computers the possibility of performing analyses based on more realistic models has become widely available. One of the aims of this book is to describe the basic ingredients of a family of simple elastic-plastic models of soil behaviour and to demonstrate how such models can be used in numerical analyses. Such numerical analyses are often regarded as mysterious black boxes but a proper appreciation of their worth requires an understanding of the numerical models on which they are based. Though the models on which this book concentrates are simple, understanding of these will indicate the ways in which more sophisticated models will perform.
Author :United States. Federal Highway Administration. Implementation Division Publisher : ISBN 13 : Total Pages :164 pages Book Rating :4.3/5 (91 download)
Book Synopsis Guidelines for Cone Penetration Test by : United States. Federal Highway Administration. Implementation Division
Download or read book Guidelines for Cone Penetration Test written by United States. Federal Highway Administration. Implementation Division and published by . This book was released on 1977 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual presents procedures and guidelines applicable to the use of the cone penetration test. It represents the author's interpretation of the state-of-the-art in Dutch static cone testing as of February 1977. Its contents should provide assistance and uniformity to engineers concerned with the interpretation of the data obtained from such testing. Only geotechnical engineers familiar with the fundamentals of soil mechanics and foundation engineering should use this manual. The manual includes: Introduction and review of the general principals concerning cone penetrometer testing. Individual design chapters which address topics such as: pile design, shear strength estimation, settlement calculation and compaction control; and Appendices which present previously published, pertinent information on cone penetrometer testing.
Book Synopsis Effect of Non-plastic Fines on Cone Resistance in Silty Sands by : Qiqi Huang
Download or read book Effect of Non-plastic Fines on Cone Resistance in Silty Sands written by Qiqi Huang and published by . This book was released on 2015 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effect of non-plastic fines on the cone resistance and cyclic resistance of sands and silty sands remains an unresolved problem. This study focuses on: (a) model cone penetrometer experiment study on penetration resistance of sands and silty sands at 15 and 25% silt content, (b) numerical study on the effect of permeability and compressibility (representing the effect of silt content), diameter of cone (dc) and penetration rate (v) on cone resistance in sands and silty sands, and (c) comparative analysis of the results from (a) and (b) of the effect of silt content on cone resistance through a non-dimensional parameter To (=vdc/cv, where v is the penetration rate, dc is the cone diameter and cv is the coefficient of consolidation) for all soils at the same equivalent inter-granular void ratio [(ec)eq] or relative deFnsity [(Drc)eq].In both experimental and numerical studies for saturated sands and silty sands, the normalized cone resistance (qc1N) decreased with an increase in silt content, at the same [(Drc)eq], from 0 to 25%. However this influence of silt content on penetration resistance was absent for dry sands and silty sands at the same [(Drc)eq]. The difference of cone resistance in saturated sands and silty sands, is thought to be due to partial drainage occurring in saturated silty sands whereas the penetration process is thought to be nearly drained in saturated sands. In the case of dry soils, this pore pressure influence is absent and hence the same penetration resistance is observed in sands and silty sands. This indicates the important influence of pore pressures and itsdissipation rates, depending on the silt content, on cone resistance.Both experimental data and numerical results indicate that for the same (Drc)eq, qc1N decreases as To increases, which implies a decrease in cv (or increase in silt content), because of the penetration process transition from drained to partially drained or even undrained condition. In addition, the numerical analysis shows that v and dc also influence qc1N in silty sands. qc1N decreases as v increase or dc increases (To increases) in the partially drained condition. Since fines content is not the only factor affecting cone resistance a To dependent relationship between cyclic resistance ratio (CRR) and qc1N for sands and silty sands was proposed. Further research is needed to evaluate and validate such a procedure using field data and physical model tests.
