›› 2004, Vol. 25 ›› Issue (1): 94-98.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

3D finite element modeling of consolidation for sand drained foundations and its application

WANG Xu-sheng1, CHEN Chong-xi2   

  1. 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. China University of Geosciences, Wuhan 430074, China
  • Received:2002-09-02 Online:2004-01-10 Published:2014-07-15

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Abstract: Numerical simulations based on 1D or 2D methods are insufficient to integrally describe the consolidation behaviors of sand drained foundations. On the other hand, it is very difficult to simulate the coupled three-dimensional consolidation in the situation that sand drains are dense. However, plane deformation and spatial seepage (PDSS) analysis is sufficient and acceptable. On the basis of symmetry principle and Biot’s consolidation theory, the PDSS modeling proposed is improved. A more reasonable scheme of 3D FEM grid is developed for sand drained ground in which drains are distributed on the pattern of equilateral triangle. Drains are located on nodes instead of elements and the special characteristics of radial drainage are considered. The improved model also is connected to an inverse method and applied to an engineering project to analyze the subsidence of a soft foundation preloaded by combined vacuum and embankment as well as the flux of water discharged by sand drains

Key words: sand drains, soft foundation, FEM, consolidation

CLC Number: 

  • P 642
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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