Mitigating punch-through on sand-over-clay using skirted foundations
JM Lee, YH Kim, MS Hossain, MJ Cassidy, Y Hu, SG Park
Ocean Engineering | Elsevier | Published : 2020
This paper investigates the potential for using skirted foundations as an alternative to spudcans in an attempt to mitigate punch-through failure of jack-up rigs during installation and preloading in sand-over-clay deposits. The results from a series of numerical analyses on the skirt length were presented in combination with different conditions of sand-over-clay deposit. Three-dimensional large deformation finite element (LDFE) analyses were carried out using the coupled Eulerian-Lagrangian approach. The sand was represented with a modified Mohr-Coulomb model and the clay with an extended Tresca model. The results showed that the likelihood and severity of punch-through increased with (i) ..View full abstract
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Awarded by Australian Research Council
The research presented herein was undertaken with support from the Australian Research Council (ARC) through the Linkage Project LP140100066, and Laureate Fellowship FL130100059. The work forms part of the activities of the Centre for Offshore Foundation Systems (COFS), currently supported as a node of the Australian Research Council Centre of Excellence for Geotechnical Science and Engineering (ARC CoE) and as a Centre of Excellence by the Lloyd's Register Foundation. The assistance of Dr. Dong Wang and Dr. Pan Hu in the application of the Modified Mohr-Coulomb sand model and the technical discussion with them while adopting the model into this research is gratefully acknowledged.