水库型滑坡稳定性动态变化过程有限元分析

Finite element analysis on dynamic changing process of stability of reservoir-induced landslide

以长江干流上大型岩床土质涉水白水河滑坡为研究对象,结合地质勘察、宏观变形迹象及监测成果分析,对水库型滑坡的变形特点及水动力作用下的稳定性进行了有限元分析,揭示了库水位变化、降雨对滑坡稳定性影响的特点。结果表明,白水河滑坡的变形和稳定性主要受库水位下降和强降雨的影响。研究成果可为水库型滑坡的灾害防治提供参考。

By taking the large reservoir-induced rock-bed soil landslide occurred on the main stream of Yangtze River—Baishuihe Landslide as the study case,a finite element analysis is made on the deformation characteristics and the stability under the hydrodynamic effect of the reservoir-induced landslide in combination with the relevant geological investigation and the analysis on the macro-deformation signs and the monitoring data,thus the impacts from the characteristics of reservoir water level change and rainfall on the landslide are exposed. The result shows that the deformation and the stability of Baishuihe Landslide are mainly influenced by both the drop of the reservoir water level and the strong rainfall. This study achievement can provides a reference for the prevention and control of the reservoir-induced landslide.