Download or read book Comparison of In Situ Vane Cone Penetrometer and Laboratory Test Results for Gulf of Mexico Deepwater Clays written by RJ. Ebelhar and published by . This book was released on 1988 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Site investigations were recently performed offshore at three prospective plat-form sites in water depths between 400 and 500 m in the Gulf of Mexico. Soil conditions at the sites generally range from very soft clays near the seafloor to very stiff clays at 120- to 150-m penetration. Analyses of stress history indicate the soils at these locations are generally normally consolidated. Laboratory tests were performed on recovered specimens to deter-mine the undrained shear strength. Standard laboratory miniature vane shear tests and unconsolidated-undrained triaxial tests were performed in addition to consolidated-undrained tests using stress history and normalized soil engineering properties (SHANSEP) procedures. Tests performed in the field included in-situ vane and cone penetrometer. Cone factors Nk were computed using in-situ vane shear strengths as the reference strength.
Download or read book Vane Shear Strength Testing in Soils written by Adrian F. Richards and published by ASTM International. This book was released on 1988 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The objectives of the symposium were to review the state of knowledge of the vane shear test (VST) and to provide the latest information on test theory, methods, and interpretation for the purpose of improved standardization of the field and laboratory vane tests."--Overview.
Download or read book Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering written by The Organizing Committee of the 16th ICSMGE and published by IOS Press. This book was released on 2005-09-12 with total page 3742 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 16th ICSMGE responds to the needs of the engineering and construction community, promoting dialog and exchange between academia and practice in various aspects of soil mechanics and geotechnical engineering. This is reflected in the central theme of the conference 'Geotechnology in Harmony with the Global Environment'. The proceedings of the conference are of great interest for geo-engineers and researchers in soil mechanics and geotechnical engineering. Volume 1 contains 5 plenary session lectures, the Terzaghi Oration, Heritage Lecture, and 3 papers presented in the major project session. Volumes 2, 3, and 4 contain papers with the following topics: Soil mechanics in general; Infrastructure and mobility; Environmental issues of geotechnical engineering; Enhancing natural disaster reduction systems; Professional practice and education. Volume 5 contains the report of practitioner/academic forum, 20 general reports, a summary of the sessions and workshops held during the conference.
Download or read book Submarine Mass Movements and Their Consequences written by Vasilios Lykousis and published by Springer Science & Business Media. This book was released on 2007-09-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from leading researchers in science and engineering, this book provides a global perspective on submarine mass movements and their consequences. Authors report on new findings from fundamental as well as site-specific studies from around the world. All studies relied on the most recent technologies, including multi-beam sonar imaging techniques, 3D seismic analysis, slope stability analysis, debris flow, and tsunami modeling.
Download or read book Geotechnical Abstracts written by and published by . This book was released on 1992 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geotechnical and Geophysical Site Characterization written by António Viana da Fonseca and published by . This book was released on 2004 with total page 1082 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Soils and rocks are complex natural geomaterials that exhibit a wide range in strength, stiffness, state of stress, structure, and flow characteristics. Geotechnical & Geophysical Site Characterization provides eleven keynote state-of-the-art papers, including the Mitchell Lecture. A total selection of 219 technical papers and theme reports address methods of site exploration related to ground exploration for civil engineering and construction works. These two volumes represent a collection of experience & knowledge regarding various methods of in-situ testing, geophysical techniques, innovative devices, improved interpretation algorithms, and statistical treatment of field data for the characterization of soils, rocks, and other geomaterials. The papers represent the written records and documented efforts from international experts from industry, academe, and government who participated in the Second International Conference on Site Characterization held in Porto, Portugal on September 20-22, 2004. Topics include the utilization of rotary drilling, sampling, and coring techniques. Of particular interest is the variety of in-situ tests, including standard penetration, cone penetration, flat dilatometer, pressuremeter, vane shear, piezocone, dynamic probes, and specialized tools, as well as geophysical approaches: resistivity surveys, surface waves, crosshole, downhole, electromagnetic conductivity, and ground penetrating radar. A careful and proper site evaluation is required in the analysis and design of new structures, construction monitoring, and forensic studies that require remediation. Many of the contributions relate to case studies of projects that involve shallow foundations, drilled shafts, pilings, slope stability, excavations, earth dams, tunnels, and mining. Several papers discuss a combined approach using multiple methods and/or complementary set of geotechnical & geophysical tests to ascertain the characteristics of the ground."--back cover.
Download or read book Evaluation of Offshore In Situ Vane Test Results written by Jt Hoope and published by . This book was released on 1988 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evaluation is presented of results from about 450 tests obtained with an offshore in-situ vane during geotechnical investigations in the North Sea and off the west coast of India. The soils tested are normally consolidated and included silts and clays with differing carbonate contents. The strength values of the in-situ vane are compared with strength results from triaxial tests, laboratory vane, and Torvane tests. These data are also correlated with in-situ test results obtained with the piezocone penetrometer. The in-situ vane shear strength data show a small scatter, and good agreement was found with unconsolidated undrained (UU) triaxial test results. The rate of post peak reduction in soil strength, measured on the vane shear strength-rotation curve, appears to depend on plasticity. Based on this study it is recommended that the vane be rotated to a minimum of 40° for very plastic clays to approximately 150° for clays with low plasticity, to determine post-peak strength behavior with great accuracy. It is suggested that the undrained shear strength values determined with the in-situ vane may be of greater value than other undrained shear strength measurements for axial pile design purposes. This study also yielded encouraging estimates of the coefficient of lateral stress at rest K0 based on in-situ vane and triaxial test data.
Download or read book Naval In place Seafloor Soil Test Equipment written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Naval In place Seafloor Soil Test Equipment written by R. J. Taylor and published by . This book was released on 1970 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Offshore Technology Conference written by and published by . This book was released on 1997 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Examination of Cone penetrometer Methods for Determining the Liquid Limit of Soils written by P. T. Sherwood and published by . This book was released on 1968 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improved Correlation Between Texas Cone Penetrometer Blow Count and Undrained Shear Strength of Soft Clays written by Scott M. Garfield and published by . This book was released on 2009 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Normalization and Prediction of Geotechnical Properties Using the Cone Penetrometer Test CPT written by Richard Scott Olsen and published by . This book was released on 1994 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research was to develop techniques for (1) stress normalization of CPT measurements (and geotechnical properties) and (2) CPT prediction of geotechnical properties using cone and sleeve friction resistance values. Stress normalization allows a variable geotechnical property to be reduced to an equivalent value at a standard confining stress. A new concept, the Stress Focus, was identified which provides a basis for understanding soil strength as a function of confining stress. This study demonstrated that sand friction angles for different initial relative densities converge to a Stress Focus at high confining stress (approximately 100 atm), where the strength behavior is similar to that of a sedimentary rock. Dilation of dense sands decreases with increased confining stress until the Stress Focus is reached, as confirmed using historic high pressure triaxial test data as well with CPT measurements from laboratory chamber tests and uniform soil layers. The paths of convergence to the Stress Focus are exponentially related to confining stress and are the basis for development of CPT cone and sleeve friction resistance normalization techniques. The overburden stress at the Stress Focus is soil type dependent. The stress exponent for SPT normalization was shown to be equal to the CPT derived stress exponent. CPT correlations to geotechnical properties were established using both CPT cone resistance and friction ratio. Geotechnical properties, Stress exponent, Sand friction angles, Stress normalization, Soil strength.
Download or read book Rotary Cone Penetrometer Investigations in Clay written by William E. Strohm and published by . This book was released on 1966 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rotary Cone Penetrometer Investigations in Clay written by and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A field investigation was made to study the feasibility of determining the in situ shear strength of soft clay deposits using existing rotary cone penetrometer equipment. Five cone penetration borings were made adjacent to previously made undisturbed sample borings and field vane borings. The cone penetration data were correlated with shear strength from laboratory unconfined compression and unconsolidated-undrained triaxial compression (Q) tests and also with field vane shear strength. The results of the correlations of cone thrust T divided by projected cone area Ac with shear strength s indicated that a relation of T/Ac = 18s (or s = 5.2T for the 10-sq-cm projected area of the cone used in the investigation) provides a reasonable estimate of variation of shear strength with depth for the normally consolidated clays tested. (Author).
Download or read book Underwater Technology written by and published by . This book was released on 1996 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Cone Penetrometer Testing to Determine in Situ State of Sands written by Geoffrey R. Martin and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Verification of the densities for artificial sand fill islands in the Beaufort Sea is currently carried out using the cone penetration test (CPT). Cone penetration resistance is converted to relative density using one of the correlations published by Baldi et al (1982), Villet and Mitchell (1981) or Schmertmann (1975). These correlations have been derived on the basis of prototype chamber CPT tests on clean, generally dense, sands. Sand fills in the Beaufort Sea contain nominal silt fractions (1-5% fines) and the densities of interest are frequently less than those reported in the CPT chamber test programs. There is no sound justification that these published correlations in terms of relative density are valid for evaluation of sand fills in the Beaufort Sea. Ideally, a correlation between cone resistance and density would be developed for each sand type used in island construction. Such a program of CPT chamber tests would be extremely costly and time consuming. Early in 1984, Golder Associates proposed an alternative approach to CPT interpretation to Dome Petroleum, based on the state parameter approach to sand behaviour. It was hypothesized that the cone penetration resistance could be uniquely related to the state parameter, and that this correlation may be equally applicable to clean and silty sands. The initial phase of the evaluation of the state parameter approach to CPT interpretation involved a reinterpretation of existing calibration chamber test data in terms of state parameter. In order to do this, the Steady State line for each of the relevant CPT calibration sands must be known. The findings of the initial evaluation of the CPT/state interpretation are contained in this report.... One of the objectives of this study was to determine which correlation, if any, is most applicable to silty Beaufort Sea sand fills. On the basis of laboratory testing data, the CPT correlation sands essentially show the same engineering behaviour at large (failure) strains as Beaufort Sea sands, with or without silt. On this basis, any of the correlations with state parameter are applicable and the data on Figure 13 could readily be used to determine in situ state from CPT tests with reasonable accuracy. The significant point of the study is that a state parameter approach to CPT interpretation provides a rational interpretation of cone resistance in silty sands. Many of the problems associated with interpretation in terms of relation density along are avoided using the state parameter approach"--ASTIS database.
