雾江滑坡位于涔天河水库扩建工程库首右岸的雾江峡谷进口段，下游边坡距大坝仅300余米，是一个典型的古滑坡，滑坡总体积为1 327×104 m3，雾江滑坡稳定与否严重影响到大坝及泄水建筑物的运行与安全。首先分析了滑坡体实测位移；接着针对滑坡体处于缓慢蠕滑过程中，采用极限分析法，假定安全系数为1.0，反演了滑坡体的强度参数；然后选取滑坡体内部钻孔观测位移年蠕滑率，假定滑坡体满足莫尔-库仑屈服准则，由Perzyna假设计算黏塑性应变率，结合滑坡体典型剖面有限元模型，采用弹-黏塑性有限元计算程序进行滑坡体分析，将正交设计法和优化算法相结合，反演获得滑坡体和滑带的弹性模量和黏滞系数，为进行该滑坡堆积体的稳定变形分析和监控提供了依据，也可为同类工程参考。

The Wujiang landslide at right bank of Wujiang Canyon is located at the entrance region extension project of Centian river reservoir., The distance from the downstream slope to dam is only 300 meters, which is a typical ancient landslide with a total volume of 1 327×104 cubic meters. The stability of Wujiang landslide significantly affects the operation and safety of the dam and discharge structure. The observed displacement of landslide is analyzed in this paper. The strength parameter of landslide is determined by limit analysis method with an assumption of safety factor of 1.0 during slow creep. The internal displacement of landslide is observed creep annually in the borehole observation. Assuming that the landslide satisfied Mohr-Coulomb yield criterion, viscoplastic strain rate is calculated using based on the assumption of Perzyna, the finite element calculation program of elasto-viscoplastic is adopted to analysis the landslide combined with the finite element model of typical profile of landslide, thus the elastic modulus and viscosity coefficient of landslide and sliding zone are obtained with inversion by the combination of orthogonal design and optimization algorithm, the results can provide the basis for stable deformation analysis and monitoring of the landslide and offer reference for similar projects.