三维边坡拟静力抗震稳定性分析

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Abstract On the basis of the three-dimensional(3D) slope stability analysis of the modification of normal stresses on 3D slip surface，the solution to the factor of safety of the 3D slope subjected to the 3D earthquake is derived by using the method of pseudo-static analysis. The influences of the two-dimensional(2D) and 3D pseudo-static analysis methodS on factor of safety are compared. The influential law of 3D earthquake on the factor of safety under symmetrical slip surface condition and asymmetrical condition are discussed，respectively. Then the effect of the volume of slip mass，asymmetrical extent and parameters of soils on the factor of safety are also analyzed. Finally，the relative errors of factor of safety under 3D earthquake and only the horizontal earthquake are studied. Results show that the horizontal earthquake is uppermost influencing factors，the next is the vertical earthquake，and the lateral earthquake is the weakest. The 3D solution has a better agreement with practice and a higher degree of accuracy.

Key words： slope engineering pseudo-static factor of safety three-dimensional(3D) earthquake

Received: 03 March 2010

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http://www.rockmech.org/EN/Y2011/V30/IS1/2904

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