Based on two-dimensional limit equilibrium method, this paper put forward 3D limit equilibrium method to evaluate slope stability, af- ter considering the 3D effect, the slope stability coefficient had significantly improvement, through the stability calculation on Xinling landslide, gained satisfactory results.%在二维极限平衡条分法的基础上，提出了评价边坡稳定性的三维极限平衡方法，考虑了三维效应后，边坡体的稳定系数有了明显提高，通过对信陵滑坡稳定性的计算分析，取得了较为满意的结果。
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