›› 2009, Vol. 30 ›› Issue (9): 2691-2696.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of anti-sliding stability in deep foundation of Xiangjiaba gravity dam based on interface element method

WANG Yi-feng1, 2, ZHANG Qing1   

  1. 1. College of Civil Engineering, Hohai University, Nanjing 210098, China；2. China Three Gorges Project Corporation, Yichang 443002, China
  • Received:2008-07-07 Online:2009-09-10 Published:2010-03-24

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2696

Abstract:

The rigid body limit equilibrium method and the nonlinear finite element method are often used in the analysis of anti-sliding stability in deep foundation of gravity dam. But the rigid body limit equilibrium method can not reflect the process of progressive instability and mechanical mechanism on failure for rock mass while the nonlinear finite element method is difficult to solve the displacement discontinuity of weak structural plane. Combining the research with Xiangjiaba project, the analysis of anti-sliding stability in deep foundation for 4th monolith has been carried out using interface element method. The results can supply most dangerous location, the scope and distribution of failure zone in weak structural plane and process of progressive failure in dam foundation as well as the safety coefficient of possible sliding body. These achievements provide an important technical reference reliance for dam foundation treatment measures. The computational results show that the interface element method can naturally describe discontinuous deformation of rock mass such as dislocation, openness and sliding. Besides, this method is characterized by good adaptability, calculation conveniently and high compatibility, thus being regarded as an effective way to make an analysis of anti-sliding stability in deep foundation of gravity dam

Key words: discontinuous mechanics, interface element method, gravity dam, analysis of anti-sliding stability in deep foundation

CLC Number: 

  • TV 223.3+1
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