Download or read book Shear Strength of the Stiff Bangkok Clay Under Anisotropic Consolidation written by Bashīr Aḥmad and published by . This book was released on 1970 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shear Strength Characteristics of Bangkok Clay in the Weathered Zone under K0 Anisotropic Consolidation written by Gulachol Chartri and published by . This book was released on 1971 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shear Strength Characteristices of Bangkok Clay in the Weathered Zone under K0 Anisotropic Consolidation written by C. Gulachol and published by . This book was released on 1979 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strength and Deformation Behavior of Soft Bangkok Clay written by TH. Seah and published by . This book was released on 2003 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of stress history and stress state during consolidation and shearing were studied experimentally under undrained triaxial compression and extension modes, by using the Recompression and SHANSEP techniques. In the SHANSEP tests, the samples were consolidated to a vertical consolidation stress of about 1.5 to 2 times of the preconsolidation pressure under Ko consolidation condition, followed by swelling to required overconsolidation ratio before subjecting to undrained shear. Whereas in the Recompression technique, the samples were directly consolidation to in situ effective stress before undrained shearing, the volumetric strains of the reconsolidation were less than 2%, indicating relatively reasonable sampling quality. From the undrained shear results, the Recompression tests give higher undrained shear strength than estimated from SHANSEP tests by about 28%, indicating that some destructuring of soil structure may have occurred in the SHANSEP tests due to large vertical deformation during consolidation. Consequently, the undrained shear strength and the undrained modulus obtained from the SHANSEP tests were much lower.

Download or read book Anisotropic Consolidation Behavior of Soft Bangkok Clay written by TH. Seah and published by . This book was released on 2003 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The anisotropic consolidation behavior of soft Bangkok clay is investigated by means of constant rate of strain consolidation tests with vertical and radial drainage conditions. Conventional oedometer tests were performed to verify the results of constant rate of strain consolidation tests in the vertical flow condition. Better-defined compression curves were obtained from the CRS tests, resulting in better estimation of preconsolidation pressure. A new method of determining the preconsolidation pressure based on the pore pressure ratio gave values close to those obtained from the Casagrande construction of compression curves. The results of CRS tests under different drainage conditions indicated that soft Bangkok clay is slightly anisotropic, with the ratio of coefficients of consolidation and permeability in the horizontal to vertical directions of about unity at in-situ stress. The difference increases with increasing stress due to stress-induced anisotropy of the soil.

Download or read book Shear Strength Characteristics of the Stiff Bangkok Clay written by Diti Hengchaovanich and published by . This book was released on 1970 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geotechnical Abstracts written by and published by . This book was released on 1992 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Stress Anisotropy on Stiffness of Clays Using Bender Elements written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Studying and determination of shear wave velocity and shear modulus of clay has a considerable importance in geotechnical engineering. By concerning the real field situation, the initial shear modulus of soil is an important parameter for a variety geotechnical design applications, especially in small strain dynamics. Several methods and techniques are exists. The technique which is based on propagation of shear wave through soil sample was adopted in this study to measure shear modulus. The shear modulus was measured using a pair of bender elements installed at the top cap and pedestal of the triaxial cell. This research aims are to study variation of shear modulus and shear wave velocity with different stress consolidation (isotropic and anisotropic). The isotropic and anisotropic consolidation was conducted step by step so the variation of shear modulus can be determined. To examine the influence of deviator stress on shear modulus, a number of tests of consolidated undrained triaxial compression tests were performed both in anisotropic and isotropic conditions. There is a unique relationship between shear modulus and mean effective stress for both isotropic and anisotropic consolidated samples. It was found that no discernible effect of anisotropy of stress on the values of shear modulus even at high mean effective stress. The undrained shearing was carried out at the strain rate of 0.02 mm/min, during this steps, the elastic shear modulus was continuously recorded. The shear modulus obtained during undrained triaxial shearing exhibit similar dependency on the mean effective stress. The path of shear modulus during undrained shearing, both from isotropically and anisotropically consolidated samples generally followed the path obtained during consolidations. It implied the negligible effect of the deviator stress on shear modulus. An empirical equation was then proposed to express the shear modulus against mean effective stress for Bangkok clay.

Download or read book Soil Strength and Slope Stability written by J. Michael Duncan and published by John Wiley & Sons. This book was released on 2014-09-22 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive guide to the critical issue of slope stability and safety Soil Strength and Slope Stability, Second Edition presents the latest thinking and techniques in the assessment of natural and man-made slopes, and the factors that cause them to survive or crumble. Using clear, concise language and practical examples, the book explains the practical aspects of geotechnical engineering as applied to slopes and embankments. The new second edition includes a thorough discussion on the use of analysis software, providing the background to understand what the software is doing, along with several methods of manual analysis that allow readers to verify software results. The book also includes a new case study about Hurricane Katrina failures at 17th Street and London Avenue Canal, plus additional case studies that frame the principles and techniques described. Slope stability is a critical element of geotechnical engineering, involved in virtually every civil engineering project, especially highway development. Soil Strength and Slope Stability fills the gap in industry literature by providing practical information on the subject without including extraneous theory that may distract from the application. This balanced approach provides clear guidance for professionals in the field, while remaining comprehensive enough for use as a graduate-level text. Topics include: Mechanics of soil and limit equilibrium procedures Analyzing slope stability, rapid drawdown, and partial consolidation Safety, reliability, and stability analyses Reinforced slopes, stabilization, and repair The book also describes examples and causes of slope failure and stability conditions for analysis, and includes an appendix of slope stability charts. Given how vital slope stability is to public safety, a comprehensive resource for analysis and practical action is a valuable tool. Soil Strength and Slope Stability is the definitive guide to the subject, proving useful both in the classroom and in the field.

Download or read book Comparison of Undrained Shear Strength in Anisotropically and Isotropically Consolidated Clay written by Robert T. Donaghe and published by . This book was released on 1973 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of R-triaxial compression tests was performed on normally consolidated and overconsolidated specimens of lacustrine clay consolidated both isotropically and anisotropically. Undrained shear strength su and the effective angle of internal friction for normally consolidated specimens were practically the same for anisotropically and isotropically consolidated specimens; however, the apparent angle of internal friction of the anisotropically consolidated specimens was greater than that of the isotropically consolidated specimens. Strength envelopes were curved in the overconsolidated range. The pore-pressure parameter A and axial strain at the maximum deviator stress were much smaller for anisotropically consolidated specimens. (Modified author abstract).

Download or read book Correlations of Soil and Rock Properties in Geotechnical Engineering written by Jay Ameratunga and published by Springer. This book was released on 2015-12-11 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a one-stop reference to the empirical correlations used extensively in geotechnical engineering. Empirical correlations play a key role in geotechnical engineering designs and analysis. Laboratory and in situ testing of soils can add significant cost to a civil engineering project. By using appropriate empirical correlations, it is possible to derive many design parameters, thus limiting our reliance on these soil tests. The authors have decades of experience in geotechnical engineering, as professional engineers or researchers. The objective of this book is to present a critical evaluation of a wide range of empirical correlations reported in the literature, along with typical values of soil parameters, in the light of their experience and knowledge. This book will be a one-stop-shop for the practising professionals, geotechnical researchers and academics looking for specific correlations for estimating certain geotechnical parameters. The empirical correlations in the forms of equations and charts and typical values are collated from extensive literature review, and from the authors' database.

Download or read book Beyond 2000 in Computational Geotechnics written by Ronald B.J. Brinkgreve and published by Routledge. This book was released on 2019-01-22 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented during the first international PLAXIS symposium. Topics covered include: general geo-technical aspects; tunnels and deep excavations, and education and research. This pack is meant for the user of the PLAXIS program, as well as engineers and researchers.

Download or read book The Anisotropic and Isotropic Strength Behavior of an Illitic Clay written by Miles M. O'Brien and published by . This book was released on 1977 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cause and the nature of anisotropy in a cohesive soil was investigated by direct shear and triaxial compression tests. Laboratory techniques and procedures used to prepare isotropic clay samples are given where consolidation was accomplished under hydrostatic pressure. Direct shear tests were performed on these specimens trimmed at different inclinations to the physical horizontal from the block samples. The ratio of undrained shear strengths in any direction to shear strength in the vertical direction was found to be equal to one, proving isotropy existed. Similar tests were performed on specimens trimmed from the same clay consolidated one-dimensionally. Results from these tests showed the shear strength ratio to be maximum for specimens trimmed at 90° to the horizontal plane. In this case, the aniso- tropic characteristics were directly attributed to the sample stress history. These samples indicated preferred particle orientation. Undrained triaxial compression tests were performed on both hydrostatic and one-dimensionally consolidated samples. Triaxial test results confirmed the results of the direct shear tests and more accurately defined the stress/strength parameters. The angle between the failure plane and the test specimens axis was essentially constant and the ratio between pore water pressure at failure and the mean consolidation stress remained a constant. For each maximum consolidation stress, pore pressure was isotropic, but in all cases was higher for hydrostatically prepared samples. The hydrostatic method of preparing isotropic test specimens was effective and produced reliable results.

Download or read book The Quarterly Journal of Engineering Geology written by and published by . This book was released on 1978 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shear Strength of Bangkok Clay Under Vibratory Loading written by Pranai Satyavanija and published by . This book was released on 1970 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Remolding Stresses and Directional Strength Behavior of an Illitic Clay written by RP. Khera and published by . This book was released on 1976 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cause and the nature of anisotropy in a cohesive soil was investigated by direct shear and triaxial compression tests. Samples formed under hydrostatic stress showed isotropic shear strength and pore pressure behavior as well as the lack of bias in soil fabric. When the samples from the same clay were molded under one-dimensional consolidation stress, the pore pressure was observed to be isotropic, but the effective stress shear strength was not. Also, these samples had oriented soil structure. The anisotropic strength resulted from the sample stress history and not from the stresses existing prior to shearing. The ratio between the pore pressure at failure and the mean consolidation pressure during remolding, as well as the inclination of the failure plane to the specimen axis, were observed to be essentially constant for all specimens.

Download or read book The Effect of Anisotropy and Reorientation of Principal Stresses on the Shear Strength of Saturated Clay written by James Michael Duncan and published by . This book was released on 1965 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: