Journal article
Predicting peak resistance of spudcan penetrating sand overlying clay
P Hu, SA Stanier, MJ Cassidy, D Wang
Journal of Geotechnical and Geoenvironmental Engineering | ASCE-AMER SOC CIVIL ENGINEERS | Published : 2014
Abstract
Accurately predicting peak penetration resistance qpeak during spudcan installation into sand overlying clay is crucial to an offshore mobile jack-up industry still suffering regular punch-through failures. This paper describes a series of spudcan penetration tests performed on medium-loose sand overlying clay and compares the response to existing centrifuge data from tests performed on dense sand overlying clay. Together these data demonstrate that punch-through is a potential problem for both dense and loose sand overlying clay soil stratigraphies. Using this experimental database, a failure-stress-dependent model has been modified to account for the embedment depth, and the depth of occur..
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Funding Acknowledgements
This work forms part of the activities of the Centre for Offshore Foundation Systems (COFS), which is supported by the Lloyd's Register Educational Trust as a Centre of Excellence and is now forming one of the primary nodes of the Australian Research Council (ARC) Centre of Excellence in Geotechnical Science and Engineering. This project has received additional support from the Australia-China Natural Gas Technological Partnership Fund and the ARC Discovery program. The authors are grateful for this support and also to drum centrifuge technician Mr. Bart Thompson for his assistance during the experimental work and to Dr. Kok Kuen Lee for providing data on the original dense sand over clay experiments and for fruitful discussions regarding the work.