四清水库土坝下游滑坡反演分析

Re-analysis for Downstream Slope Sliding of Earth-dam on Siqing Reservoir

选取具有代表性的滑坡体横剖面,建立有限元数学模型,编制反演计算程序,采用滑坡体近期地质勘探资料及土工试验成果,利用计算机搜索演算出下游坝坡滑坡时的最小安全系数;再令其安全系数等于1,反演推算出该滑坡体处于安全状态下所需的力学强度指标。

The finite element model is established on the basis of the representative crosssection of the sliding slope,so the reanalysis program is compiled. With the help of the recent geologic prospecting data and soil test results,the computer search as for the sliding surface of the downstream sliding slope responding to the minimum safety factor. Then, the safety factor of this surface is supposed equal to 1.0. The mechanical factors ensuring the slope in steady state could be calculated through the method of reanalysis.