Bearing Capacity and Critical Punch-Through Depth of Spudcan on Sand Overlying Clay

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 mod...

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Bibliographic Details
Published in:China ocean engineering 2014-03, Vol.28 (1), p.139-147
Main Author: 刘君 于龙 周慧 孔宪京
Format: Article
Language:English
Subjects:
Bearing strength
Clay (material)
Coastal Sciences
Computer simulation
Engineering
Fluid- and Aerodynamics
Marine
Marine & Freshwater Sciences
Mathematical analysis
Mathematical models
Numerical and Computational Physics
Oceanography
Offshore Engineering
Sand
Simulation
Soils
Strength
Tresca屈服准则
临界深度
弹塑性模型
有限元法
极限承载力
渗透过程
砂粘土
穿通
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Summary: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.
ISSN:0890-5487
2191-8945
DOI:10.1007/s13344-014-0011-x