›› 2012, Vol. 33 ›› Issue (1): 197-203.

• Geotechnical Engineering • Previous Articles     Next Articles

Time-varying reliability analysis of anchor system of rock slopes with double slide blocks

CHEN Chang-fu1，CHENG Xiao-wei1, 2   

  1. 1. Institute of Geotechnical Engineering, Hunan University, Changsha 410082, China; 2. Zhongji Geotechnical Engineering Investigation & Design Institute, Chengdu 610052, China
  • Received:2010-05-04 Online:2012-01-10 Published:2012-01-17

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Abstract: Considering the multiple failure modes of anchor system such as pulling out of grouting mass from surrounding rock, the tensile failure of the pull rod and the shearing failure of interface between pull rod and grouting mass, etc., applying systematical reliability principle and limit equilibrium method, a direct solution of failure probability of anchor system of rock slope with double slide blocks is proposed based on Monte Carlo sample principle. Meanwhile, taking the time variation of shear strength indices of soft sliding surface c and ? and the erosion of anchor bars into account, a time-variation reliability model of anchor system of rock slope with double slide blocks in consideration of multiple failure modes of anchor is established. The calculation results of examples show that the time-variations of shear strength indices of soft sliding surface c, ? and the resistance between grouting body and surrounding rock have great impact on failure probability of anchor system, while erosion of anchor bars has less impact on it.

Key words: rock slopes, anchors, failure probability, system reliability, time variation

CLC Number: 

  • TD 824.7
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