Journal of Guangdong University of Technology ›› 2018, Vol. 35 ›› Issue (06): 57-62.doi: 10.12052/gdutxb.180006

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A Stability Analysis of Slope Considering Strength Anisotropy in Soils

Liu Ya-dong, Yang Xue-qiang, Xu Lei, Lin Yao-kang, Gong Xing   

  1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2018-01-11 Online:2018-11-23 Published:2018-11-23

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Abstract: Due to the anisotropic characteristic of natural soils, their effects should be considered in slope stability analysis. For soils, the expressions of shear strength parameters c and φ are proposed by incorporating an anisotropic state scalar parameter which is a joint invariant of material fabric tensor and normalized deviatoric stress tensor, and the validity of the formula is verified by existing test results. The formula of anisotropic strength parameter is applied to slope stability analysis and a large number of calculations are performed. The results show that slope safety factor can be reduced by 22.0% after considering the anisotropy of strength for the gentle slope with an angle of 14°. When the slope angle is increased to 55°, the relative difference of safety factor in isotropy and anisotropy is slightly more than 8.0%. It indicates that the anisotropy of soil strength has a greater impact on the gentle slope than on the steep slope, especially for high and gentle slopes, which deserves attention.

Key words: fabric tensor, strength anisotropy, limit equilibrium method, slope stability

CLC Number: 

  • P642
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