边坡稳定三维极限分析方法及工程应用

边坡稳定三维极限分析方法有上限解和极限平衡两种方法。上限解具有理论基础严格，计算安全系数步骤简捷的优点；极限平衡方法较以往的相关成果更为严格，它是二维的Spencer法在三维条件下的扩展。同时使用这两种方法求解安全系数，可以使两种方法各自的局限性得到弥补，并且可以将安全系数限制在一个很小的区间内，获得满足精度要求的解答。通过小湾堆积体工程实例说明了其可行性和实用性。

The 3D limit method for slope stability analysis and applications

The three-dimensional limit method for slope stability analysis includes the upper bound method and the 3D limit equilibrium method. The upper bound method features in its rigorous theoretical background and simple numerical procedures. The 3D limit equilibrium method is actually an extension of the Spencer Method in 2D area. It provides a more rigorous theoretical background, compared to those already published in the literature. To combine the upper bound method with the 3D limit equilibrium method, the 3D factors of safety can be reasonably bracketed in a small range. Its applications to Xiaowan deposit project show its feasibility and practicality.