THREE-DIMENSIONAL SLOPE STABILITY ANALYSIS BASED ON FINITE ELEMENT STRESS
GUO Mingwei，LI Chunguang，WANG Shuilin
(State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China)
Abstract：It is a frequently used method in three-dimensional(3D) slope stability analysis based on the stress field of slope obtained by finite element computation. The factor of safety is defined as the ratio of resisting force and driving force along the specified slip surface. The analytical solution of 3D simple slope is compared with the numerical solutions obtained with this proposed method. The calculating results show that the Poisson?s ratio of material has some influence on the factors of safety obtained with this method and stress distribution. The factor of safety calculated with this method is in full agreement with the analytic solution when the Poisson?s ratio is close to 0.5. Finally，this method is applied to a high rock slope. The calculating results are well comparable with the factors of safety obtained by strength reduction technique.
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2012, Vol. 31 
