›› 2009, Vol. 30 ›› Issue (7): 2037-2042.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Cyclic accumulative deformation of bucket foundation on soft clay strata

LIU Kun1, ZHAO Chun-feng1, WANG Jian-hua2, WANG Xue-zhi1   

  1. 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Institute of Geotechnical Engineering, Tianjin University, Tianjin 300072, China
  • Received:2008-05-26 Online:2009-07-10 Published:2011-03-10

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Abstract:

The primary goal of this research is to solve the deformation problem of the bucket foundation on soft clay strata under cyclic load. Firstly, by cyclic model test, the failure characters of bucket foundation under static and cyclic load are studied. Secondly, unconsolidated undrained cyclic triaxial tests of the soil used in the model test are conducted under different static and cyclic loads to study characters of cyclic accumulative strains; and the relationship between strains and the relative factors is established. Finally, the model tests are simulated by using the finite element method. The cyclically accumulated deformation is equalized as a process of creep; and the deformation is calculated using ideal elastoplastic plus creep model. Then the calculated result is compared with the test result. It is concluded that the deformation of bucket of bucket foundation on soft clay strata under cyclic load is similar to the creep under static load, and the cyclic accumulative deformation can be calculated using this equalized method.

Key words: bucket foundation, cyclic cumulative deformation, creep, model test, finite elements

CLC Number: 

  • TU 443
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