Journal of Dalian Maritime University >
2016 , Vol. 42 >Issue 1: 119 - 124
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2016.01.021
Punch-through ballast experiment and numerical simulation of pile and soil cavity
Received date: 2015-07-01
Revised date: 2015-08-31
Online published: 2015-08-31
Based on punch-through ballast experiment, the pile penetration process of jack-up platform was simulated by using ABAQUS/ALE finite element method. Cavity mechanism numerical simulation in pile and soil penetrating process was studied by monitoring the time course changes of soil point displacement at spudcan bottom, soil surface and spudcan rim. Numerical simulation results indicate that the spudcan bearing increases distinctly when the cavity failures, and the shear failure of the vertical cavity wall resulted from the back-flow of soil under spudcan is the main reason resulting in cavity formation and progress. Numerical simulation results of punch-through phenomenon were verified by punch-through ballast experiment. Test results show that the numerical solution concide well with test. When punch-through occurs, the spudcan bearing sharp fall off and the outside spudcan pressure is almost 5~10 times to the inside, and pressure change appears the non-linear distribution, which is not coincided to the liner assumption in “Rules for the classification and construction of offshore mobile drilling units” of CCS.
ZHANG Zhao-de , ZHANG Xin , XU Peng . Punch-through ballast experiment and numerical simulation of pile and soil cavity[J]. Journal of Dalian Maritime University, 2016 , 42(1) : 119 -124 . DOI: 10.16411/j.cnki.issn1006-7736.2016.01.021
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