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库水和降雨是三峡库区滑坡失稳的主要触发因素。以库区石榴树包滑坡为例,基于饱和非饱和渗流理论,采用有限元方法和极限平衡方法,对该滑坡在库水位骤降和降雨强度共同作用下的地下水渗流场变化及稳定性进行计算。结果表明,降雨及降雨与库水骤降共同作用对该滑坡稳定均为不利工况。
Reservoir water and rainfall are the main triggers of landslide instability in the Three Gorges reservoir area. Taking the Shiliushubao landslide in the reservoir area as an example, based on the theory of saturated unsaturated seepage, the finite element method and the limit equilibrium method are used to calculate the change and stability of groundwater seepage field under the combined effect of plunge of reservoir water level and rainfall intensity . The results show that the combined effect of rainfall and rainfall with the plunge of reservoir water is unfavorable to the stability of the landslide.