某滑坡蓄水后的三维稳定性数值分析

Stability assessment of a landslide after impoundment by using 3D numerical analysis

通过有限差分软件FLAC3D对滑坡进行了三维稳定性计算和分析,采用强度折减法计算出蓄水边坡的安全系数。计算结果表明:该滑坡在蓄水条件下,整体仍处于稳定状态,只是在相对较陡的滑坡体前缘和库水位淹没区,蓄水后可能会产生小规模失稳。边坡采用强度折减法计算的安全系数为1.20。

This paper analyzes the stability of the landslide by using FLAG3D. In the meanwhile, the factor of safety after impoundment which is 1.20 is received through shear strength reduction method. The assessment indicates that the whole landslide is stable in impoundment condition, and the steep parts at toe of landslide and near the reservoir level are unstable, but the scale is small and have no effect on the dam.