Spudcan Deep Penetration in Multi-Layered Soils Incorporating Sand Relative Density
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Published:2022-12-27
Issue:1
Volume:11
Page:33
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ISSN:2077-1312
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Container-title:Journal of Marine Science and Engineering
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language:en
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Short-container-title:JMSE
Author:
Zhao Jun,Zhu Qingyun,Huang Wenjing,Zhang Yang,Liu Luyu
Abstract
Installing a spudcan jack-up rig in sediments with an interbedded sand-over-clay soil profile is still challenging in the offshore industry due to possible punch-through failure. The current methods for predicting the punch-through of spudcan usually ignore sand relative density, which is one of the most important parameters for sand soil. For multi-layered soils with interbedded sand commonly met in the field, this paper aims to determine the effects of sand relative density on predicting the punch-through failure of spudcan. Modified Mohr-Coulomb (MMC) and extended Tresca models characterized by incorporating a variation of mobilized strength parameters were used to describe the mechanical behaviors of sand and clay. Besides four groups of centrifuge tests, one field case in the South China Sea was also numerically simulated to validate the large deformation finite element (LDFE) analyses conducted in this paper. The results showed that neglect of sand relative density may lead to underestimation of the potential for punch-through failure of spudcan.
Funder
National Natural Science Foundation of China
Natural Science Basic Research Program of Shaanxi Province
Open Project Program of Shandong Marine Aerospace Equipment Technological Innovation Center, Ludong University
Subject
Ocean Engineering,Water Science and Technology,Civil and Structural Engineering
Reference34 articles.
1. Osborne, J.J., and Paisley, J.M. (2002, January 26–28). S E Asia jack-up punch-throughs: The way forward. Proceedings of the International Conference on Offshore Site Investigation and Geotechnics Sustainability and Diversity, London, UK.
2. Opportunities to Improve the Operational and Technical Management of Jack-up Deployments;Hunt;Mar. Struct.,2004
3. Experimental investigation of spudcan penetration in multi-layer clays with interbedded sand layers;Hossain;Geotechnique,2014
4. On the influence of progressive failure on the bearing capacity of shallow foundation in dense sand;Yamaguchi;Soils Found.,1976
5. Centrifugal modelling of bearing capacity of shallow foundations on sand;Aiban;J. Geotech. Eng.,1995