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Indexed by:期刊论文

Date of Publication:2014-03-01

Journal:CHINA OCEAN ENGINEERING

Included Journals:SCIE、EI、ISTIC、Scopus

Volume:28

Issue:1

Page Number:139-147

ISSN No.:0890-5487

Key Words:spudcan foundation; punch-through; sand overlying clay; double layer; jack-up platform

Abstract:Spudcan may experience punch-through failure on strong over weak layered soils, such as sand overlying clay. A large deformation finite element method (LDFE) is used to simulate the penetration process of spudcan into sand overlying clay. The sand is simulated by smoothed hyperbolic Mohr-Coulomb model, and the clay is simulated by a simple elasto-plastic model which obeys Tresca yield criterion. According to the LDFE results of a large amount of cases, the effects of the strength, unit weight and thickness of the top sand layer, as well as the effect of the strength of the underlying clay on the spudcan punch-through behavior, are investigated. The critical depth occurring punch-through and the critical bearing capacity are presented in charts. Fitting equations to calculate the critical punch-through depth and the critical bearing capacity are proposed for the convenience of engineering practice.