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Piles driven in clay are often subjected to indirect loading as a result of the surcharge applied on the surrounding area. During the drained period, both the pile and the soil undergo downward movements caused by the axial and the surcharge loading, respectively. Depending on the relative movement of the pile/soil system, positive and negative skin friction develop on the pile's shaft. Negative skin friction is the drag force that may be large enough to reduce the pile capacity and/or to overstress the pile's material causing fractures or perhaps structural failure or possibly pulling out the pile from the cap. A numerical model was developed to simulate the case of a single pile driven in soft clay layer overlying a deep deposit. Coupled consolidation method of analysis is adopted to predict time/settlement/skin friction distribution relationships. The model is an axisymmetric that uses the finite element technique combined with the soil responses according to Mohr-Coulomb criteria. The model was first tested against the results predicted by the classic theories for bearing capacity of pile foundations on clay. Furthermore, the model was validated with the results of three full scale field tests available in the literature.
This textbook first published in 1992 now appearing in its third edition retains the best features from the earlier editions and adds significantly to the contents, which include developments in the 1990s.
Master the core concepts and applications of foundation analysis and design with Das/Sivakugan’s best-selling PRINCIPLES OF FOUNDATION ENGINEERING, 9th Edition. Written specifically for those studying undergraduate civil engineering, this invaluable resource by renowned authors in the field of geotechnical engineering provides an ideal balance of today's most current research and practical field applications. A wealth of worked-out examples and figures clearly illustrate the work of today's civil engineer, while timely information and insights help readers develop the critical skills needed to properly apply theories and analysis while evaluating soils and foundation design. Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.
Sponsored by the Executive Committee of the Geotechnical Engineering Division of ASCE. This Geotechnical Special Publication contains eight lectures given between 1974 and 1983 in honor of Karl Terzaghi and repressenting diverse aspects of geotechnical engineering and engineering geology. Topics include: the relationship of geology and geotechnical engineering and how a study of the geology of engineering sites is an important starting point for all geotechnical site studies; effects of dynamic soil properties on soil-structure interaction; bearing capacity and settlement of pile foundations; design and construction of drilled shafts; evaluating calculated risk in geotechnical engineering; proposal forØthe establishment of a national center for investigating civil engineering failures, with several case studies; pre-Columbian earth construction in the Americas and technological developments between 2,500 and 500 years ago; and recent progress in the design and construction of concrete-face rockfill dams. The 1978 lecture by the late N.M. Newmark is not included.