A plasticity model for spudcan foundations in soft clay

作者：Zhang Youhu^*; Cassidy Mark J; Bienen Britta

来源：Canadian Geotechnical Journal, 2014, 51(6): 629-646.

DOI：10.1139/cgj-2013-0269

• plasticity model
• soft clay
• backflow
• spudcan
• combined loading
• yield surface
• geotechnical centrifuge

A plasticity model for predicting the load displacement behaviour of a typical spudcan foundation for offshore jack-up platforms under combined vertical, horizontal, and moment loading in soft clay is presented. Results from geotechnical centrifuge experiments of a spudcan embedded vertically to 0.7, 1.0, and 1.45 footing diameters are described. Augmented with finite element results, these centrifuge experiments are used to evaluate the plasticity model components. As a result of soil backflow on top of the spudcan, enhanced combined bearing capacity was measured and this is reflected in increased yield surface size. A tensile vertical load capacity is also incorporated. The excellent predictive capabilities of the model are demonstrated by retrospectively simulating a selection of centrifuge tests.

• 出版日期2014-6