基于有限元应力的三维边坡稳定性分析

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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.

Key words： slope engineering slope stability finite element stress strength reduction technique analytical solution

Received: 18 July 2012

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http://www.rockmech.org/EN/Y2012/V31/I12/2494

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