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Book Full scale Testing of Blast induced Liquefaction Downdrag on Driven Piles in Sand

Download or read book Full scale Testing of Blast induced Liquefaction Downdrag on Driven Piles in Sand written by Luke Ian Kevan and published by . This book was released on 2017 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deep foundations such as driven piles are often used to bypass liquefiable layers of soil and bear on more competent strata. When liquefaction occurs, the skin friction around the deep foundation goes to zero in the liquefiable layer. As the pore pressures dissipate, the soil settles. As the soil settles, negative skin friction develops owing to the downward movement of the soil surrounding the pile. To investigate the magnitude of the skin friction along the shaft three driven piles, an H-pile, a closed end pipe pile, and a concrete square pile, were instrumented and used to measure soil induced load at a site near Turrell, Arkansas following blast-induced liquefaction. Measurements were made of the load in the pile, the settlement of the ground and the settlement of piles in each case. Estimates of side friction and end-bearing resistance were obtained from Pile Driving Analyzer (PDA) measurements during driving and embedded O-cell type testing.

Book Dissertation Abstracts International

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Full scale Testing of Blast induced Liquefaction Downdrag on Auger cast Piles in Sand

Download or read book Full scale Testing of Blast induced Liquefaction Downdrag on Auger cast Piles in Sand written by Joseph Erick Hollenbaugh and published by . This book was released on 2014 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deep foundations like auger-cast piles and drilled shafts frequently extend through liquefiable sand layers and bear on non-liquefiable layers at depth. When liquefaction occurs, the skin friction on the shaft decreases to zero, and then increases again as the pore water pressure dissipates and the layer begins to settle, or compact. As the effective stress increases and the liquefiable layer settles, along with the overlaying layers, negative skin from the soil acts on the shaft. To investigate the loss of skin friction and the development of negative skin friction, soilinduced load was measured in three instrumented, full-scale auger-cast piles after blast-induced liquefaction at a site near Christchurch, New Zealand.

Book A Lateral Load Test of a Full Scale Pile Group in Sand

Download or read book A Lateral Load Test of a Full Scale Pile Group in Sand written by Clark Stephen Morrison and published by . This book was released on 1988 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lateral-load tests were performed on a large-scale, well-instrumented group of piles in sand. A similar single pile, also well-instrumented, was tested in the same soil. The group of piles and the single pile were installed in Houston for previous research projects. The native clay soil was removed from the upper portion of the piles and replaced with clean sand. Cyclic lateral loads were applied to the piles, and the response of the instrumentation was recorded. The results of the loads test of the group are compared with the results of current design methods. The methods include DEFPIG, the Focht-Koch method, the single-pile method, and the Bogard-Matlock method. Because none of the methods provided entirely satisfactory results, an analytical procedure is provided which yields good agreement with the results of the load-test.

Book Full Scale Static Lateral Load Test of a 9 Pile Group in Sand

Download or read book Full Scale Static Lateral Load Test of a 9 Pile Group in Sand written by Dustin Shaun Christensen and published by . This book was released on 2006 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The test on the single pile was modeled using the computer program LPILE Plus version 4.0 (Reese et al., 2000). The soil profile was calibrated by alternating the input soil parameters until the curves matched between the measured and the calculated results. The new soil profile was then used to model the test on the pile group using GROUP version 4.0 (Reese and Wang, 1996). A match was made between the measured test results and those calculated using GROUP by defining p-multipliers for each of the rows. For Cycle 1 the p-multipliers were found to be 1.0, .55, and .5 for Row 1 through Row 3 respectively. For Cycle 10 the p-multipliers were found to be the same as those for Cycle 1.

Book Lateral Load Tests on Full scale Pile Groups in Cohesive Soils

Download or read book Lateral Load Tests on Full scale Pile Groups in Cohesive Soils written by and published by . This book was released on 1973 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Physical Modelling in Geotechnics Two Volume Set

Download or read book Physical Modelling in Geotechnics Two Volume Set written by Sarah Springman and published by CRC Press. This book was released on 2010-06-17 with total page 1530 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book results from the 7th ICPMG meeting in Zurich 2010 and covers a broad range of aspects of physical modelling in geotechnics, linking across to other modelling techniques to consider the entire spectrum required in providing innovative geotechnical engineering solutions. Topics presented at the conference: Soil – Structure – Interaction; Natural Hazards; Earthquake Engineering: Soft Soil Engineering; New Geotechnical Physical; Modelling Facilities; Advanced Experimental Techniques; Comparisons between Physical and Numerical Modelling Specific Topics: Offshore Engineering; Ground Improvement and Foundations; Tunnelling, Excavations and Retaining Structures; Dams and slopes; Process Modelling; Goenvironmental Modelling; Education

Book Full Scale Static and Dynamic Lateral Loading of a Single Pile

Download or read book Full Scale Static and Dynamic Lateral Loading of a Single Pile written by Norazzlina M.Sa'don and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study presents the results of full scale field tests on single free head piles embedded in Auckland residual clay. Four hollow steel pipe piles, each with an outside diameter of 273 mm and wall thickness of 9.3 mm were installed at a site in Pinehill, Auckland. Static lateral loads were applied by using hydraulic jack, while dynamic loads were applied using an eccentric mass shaker. The free vibration and snap-back tests were also performed by using instrumented sledgehammer and snap shackle as the quick release mechanism. The primary purpose of the pile testing is to measure the inertial response of piles in Auckland soils and to investigate how the soil stiffness decreases with increasing pile head excitation. The field work initially started with measurement of the small strain stiffness of the soil using wave activated stiffness (WAK) tests and spectral analysis surface waves (SASW) tests. Seismic cone penetration tests (SCPT), low level response of the pile generated by hammer blows and excitation from an eccentric mass shaker were also performed. All of these indicated that a consistent value for the small strain stiffness of the soil. The elastic continuum model (ECM) is the main tool that used for analysis of the pile response. This model has the advantage that it has been extended to enable nonlinear behaviour of the soil around the long elastic pile to be modelled. The approach taken is to interpret the field response in order to estimate the factor by which the small strain stiffness of the soil needs to be reduced to represent the correct stiffness of the cyclic loading loops. In other words, this approach used to evaluate the response of the pile using the design approach outlined in Table 4.1 of EC8 part 5. A soil stiffness reduction factor, Gs / Gs,max of 0.36 was found to give a reasonable prediction for a single pile embedded in Auckland residual clay. This factor agrees very well for the computed values of the pile head load-displacement curve when compared with the static and dynamic full scale field test results performed. Two numerical models, which are OpenSeesPL and Ruaumoko are used to model the single pile subjected to lateral loading. These results were then validated using the full scale field tests data. From a comparison of the predictions and the experimental results of full scale single piles suggest that if the proposed method and model are accurately verified and properly used, then they are capable of producing realistic predictions. A procedure that was particularly developed for preliminary design estimates of a single long pile under the lateral loading is also presented in this thesis.

Book Behavior of Piles in Full scale Field Lateral Loading Tests

Download or read book Behavior of Piles in Full scale Field Lateral Loading Tests written by Steven Lawrence Kramer and published by . This book was released on 1991 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Analysis of Pile Foundations Subject to Static and Dynamic Loading

Download or read book Analysis of Pile Foundations Subject to Static and Dynamic Loading written by Amir M. Kaynia and published by CRC Press. This book was released on 2021-08-30 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents computational tools and design principles for piles used in a wide range of applications and for different loading conditions. The chapters provide a mixture of basic engineering solutions and latest research findings in a balanced manner. The chapters are written by world-renowned experts in the field. The materials are presented in a unified manner based on both simplified and rigorous numerical methods. The first four chapters present the basic elements and steps in analysis of piles under static and cyclic loading together with clear references to the appropriate design regulations in Eurocode 7 when relevant. The analysis techniques cover conventional code-based methods, solutions based on pile-soil interaction springs, and advanced 3D finite element methods. The applications range from conventional piles to large circular steel piles used as anchors or monopiles in offshore applications. Chapters 5 to 10 are devoted to dynamic and earthquake analyses and design. These chapters cover a range of solutions from dynamic pile-soil springs to elasto-dynamic solutions of large pile groups. Both linear and nonlinear soil behaviours are considered along with response due to dynamic loads and earthquake shaking including possible liquefaction. The book is unique in its unified treatment of the solutions used for static and dynamic analysis of piles with practical examples of application. The book is considered a valuable tool for practicing engineers, graduate students and researchers.