›› 2010, Vol. 31 ›› Issue (2): 620-626.

• Numerical Analysis • Previous Articles     Next Articles

Study of stability and accumulation mechanism of colluvium affected by change of strength property

YIN Xiao-tao1, WANG Shui-lin1, MA Shuang-ke2, LIU Zhi-wen3   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Xi’an Research Institute of Highway, Xi?an 710054, China; 3. Lunan Geologic Engineering Survey Institute;Yanzhou 272100;China
  • Received:2009-09-07 Online:2010-02-10 Published:2010-03-24

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Abstract:

Physical model of rock and soil mass is built by means of particle flow code software. Based on these, two types of initial calculating condition are designed; one is all discounting from physical model, the other is all beginning with the previous discounting computing result. Each type contains three kinds of discounting method, only discounting cohesion, only discounting internal friction angle and discounting shear strength parameter. Furthermore, each kind embraces five types of discounting rates such as 1.00, 0.5, 0.1, 0.01 and 0.0. Then, evolutional map of slope shape and velocity in x direction of monitoring point are compared and analyzed. It is found that the cohesion does good to uprightness of rock and soil mass, whose failure mode is collapsing and toppling; that the internal friction angle plays an important part in stable slope angle. The failure mode changes from collapsing and toppling mode to slipping step by step mode, when strength parameters is discounting 0.1, cohesion being 10 kPa.

Key words: loose accumulation body, particle flow code, shear strength, stable slope angle

CLC Number: 

  • TU 457
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