Download or read book Triaxial Tests on Compacted Clays for Consolidated Undrained Conditions written by D. R. VandenBerge and published by . This book was released on 2014 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consolidated-undrained tests must be performed on compacted soils to provide undrained soil properties for embankment design scenarios, such as rapid drawdown. These soils are subject to anisotropic consolidation under field conditions. Laboratory testing of compacted clays must consider the effects of the consolidation stress system as well as the subtleties involved in testing initially unsaturated clay specimens. This study considers the effects of anisotropic consolidation on the undrained strength of a compacted lean clay. Strengths were measured using isotropically and anisotropically consolidated undrained triaxial compression tests. It was found that anisotropic consolidation has little effect on the undrained strength of compacted clay at vertical effective consolidation stresses below 50 kPa. As the consolidation stress increased, anisotropic consolidation was shown to decrease the undrained strength by 30 % at vertical effective consolidation stress of 300 kPa. It was also found that undrained strengths can increase by 50 % of more due to increases in relative compaction of a few %. Recommendations are presented for addressing the challenges of performing consolidated-undrained tests on compacted clays.

Download or read book Collapse Behavior of Compacted Clays in Suction Controlled Triaxial Tests written by DA. Sun and published by . This book was released on 2004 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a suction-controlled triaxial apparatus for unsaturated soils, a series of tests on a compacted clay was performed to investigate the influences of stress states, water content, void ratio, and matric suction on the collapse behavior. The triaxial tests were carried out under the conditions of (1) different stress ratios and mean stresses, (2) triaxial compression and extension, (3) different initial void ratios of specimens with the same water content, (4) different initial water contents with the same degree of compaction, and (5) different controlled matric suctions. The main conclusions were obtained as follows: (1) The volume change induced by the collapse mainly depends on the initial void ratio and mean net stress under which the collapse occurs, irrespective of imposed matric suction; (2) the amount of collapse is small at both low and high confining stresses, and there exists a maximum value of collapse at a particular mean stress; (3) the shear strain increment induced by collapse depends on stress ratio, triaxial compression, or extension stress; (4) when imposed suction is decreased, large collapse deformation takes place in the samples compacted dry-of-optimum, while little collapse deformation takes place in the samples compacted wet-of-optimum; and (5) the collapse behavior can be explained by the elastoplastic theory for unsaturated soils.

Download or read book Advanced Triaxial Testing of Soil and Rock written by Robert T. Donaghe and published by ASTM International. This book was released on 1988 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Although the triaxial compression test is presently the most widely used procedure for determining strength and stress-deformation properties of soils, there have been no books published on triaxial testing since the 1962 second edition of the landmark work The Measurement of Soil Properties in the Triaxial Test by Bishop and Henkel. It is apparent there is a need to document advances made in triaxial testing since publication of Bishop and Henkel's book and to examine the current state of the art in a forum devoted solely to triaxial testing. Because of increasing versatility brought about by recent developments in testing techniques and equipment, it is also important that the geotechnical profession be provided with an up-to-date awareness of potential uses for the triaxial test."--Overview.

Download or read book The Measurement of Soil Properties in the Triaxial Test written by Alan Wilfred Bishop and published by . This book was released on 1957 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shear Strength Characteristics of Some Residual Compacted Clays written by Paulo Teixeira da Cruz and published by . This book was released on 1963 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Triaxial Testing of Soils written by Poul V. Lade and published by John Wiley & Sons. This book was released on 2016-03-09 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Triaxial Testing of Soils explains how to carry out triaxial tests to demonstrate the effects of soil behaviour on engineering designs. An authoritative and comprehensive manual, it reflects current best practice and instrumentation.References are made throughout to easily accessible articles in the literature and the books focus is on how to obtain high quality experimental results.

Download or read book Engineering and Design written by United States. Army. Corps of Engineers and published by . This book was released on 1961 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Correlation of Repeated Triaxial and Plate loading Tests on Compacted Clay written by Siang Kok Chua and published by . This book was released on 1964 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory Shear Testing of Soils written by Symposium on Laboratory Shear Testing of Soils, Ottawa 1963 and published by ASTM International. This book was released on 2011 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Triaxial Relaxation Tests on a Soft Clay written by B. Fay and published by . This book was released on 1988 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of consolidated undrained triaxial relaxation tests on a soft sensitive clay of eastern Canada are presented and discussed. The initial consolidation phases of the traxial tests are carried out under both isotropic and anisotropic stress conditions.

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 The Influence of Stress History on Stress Paths in Undrained Triaxial Tests on Clay written by DJ. Henkel and published by . This book was released on 1964 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Remolded specimens of clay were consolidated in the triaxial apparatus under hydrostatic pressure and under a stress system corresponding to K0 consolidation. Undrained tests were performed, and the results show that the strength at failure, expressed in terms of effective stress parameters, is the same for both types of tests. The stress paths followed during consolidation and shear for both types of tests are also compared. In addition, results of tests on overconsolidated specimens for both hydrostatic and K0 consolidation are discussed.

Download or read book Multistage Triaxial Testing of Lightly Overconsolidated Clays written by RHG Parry and published by . This book was released on 1973 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comparison has been made between consolidated undrained tests on separate soil specimens and multistage testing of a single specimen. Three series of samples were prepared, two of the series consisting of remolded kaolin in each of which the specimens were lightly overconsolidated under K0 conditions, and one series consisting of undisturbed specimens of soft silty clay from a site at Fulford near York in England. It is concluded from these tests that although some differences arise from the two methods, the results from multistage tests are adequate for practical purposes both in the prediction of failure conditions and in the prediction of deformations and pore pressure response under working loads. In view of the number of advantages accruing from multistage testing, it is recommended that this method should be used in the routine triaxial testing of soft lightly overconsolidated clays of low sensitivity.

Download or read book Laboratory Shear Strength of Soil written by Ramond Nen Yong and published by ASTM International. This book was released on 1981 with total page 721 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Undrained Strength of Compacted Clays After Soaking written by Harry Bolton Seed and published by . This book was released on 1960* with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Experimental Unsaturated Soil Mechanics written by Alessandro Tarantino and published by CRC Press. This book was released on 2005-07-14 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of experimental unsaturated soil mechanics has grown considerably over the last decade. In the laboratory and in the field, innovative techniques have been introduced into mechanical, hydraulic, and geo-environmental testing. Normally, this information is widely dispersed throughout journals and conference proceedings and it is often difficult to identify suitable equipment and instrumentation for research or professional purposes. In this volume, however, the authors bring together the latest research in laboratory and field testing techniques, and the equipment employed, and examine the current state-of-the-art in a forum devoted solely to experimental unsaturated soil mechanics. The papers published in the proceedings were peer-reviewed by internationally-recognized researchers. The topics tackled by the papers include suction measurement, suction control, mechanical and hydraulic laboratory testing, geo-environmental testing, and field-testing.

Download or read book Automated Triaxial Testing of Soft Clays written by TC. Sheahan and published by . This book was released on 1990 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper evaluates the ability of a widely used automated commercial testing system to perform Ko consolidated-undrained triaxial compression and extension (CKoUC/E) tests on normally consolidated clay. The commercial system uses control software on a microcomputer to operate three digital pressure-volume controllers that control and measure the pore water pressure and volume, the radial stress, and the axial stress and strain for a specimen within a Bishop and Wesley Hydraulic Triaxial Apparatus. Because the commercial system calculates axial stress and strain by relying on indirect measurements assuming idealized behavior of the axial loading assembly, the system was modified to directly measure axial stress and strain. The system was also enhanced to enable shear in triaxial extension and to improve certain other testing procedures. Comparison of results from CKoUC/E tests obtained by the resulting reference system with prior data on resedimented Boston Blue Clay shows good to excellent agreement in 1-D compressibility and undrained stress-strain-strength characteristics. In contrast, stresses recorded by the commercial system resulted in significant overestimates of preconsolidation pressure, undrained strength, and the effective stress envelope, primarily caused by unquantifiable behavior of the axial loading assembly. Based on these results and other experience, the paper suggests features warranting special attention when selecting a commercially available automated triaxial system in order to upgrade the experimental capabilities of a laboratory.