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三峡水库蓄水及水位升降,将改变涉水滑坡体内的水文地质条件,对滑坡稳定产生影响,往往会造成老滑坡的复活和新生滑坡出现。白水河滑坡是长江干流上大型岩床土质涉水滑坡,该滑坡自2003年6月三峡水库蓄水至135 m以来,滑坡变形加剧,变形呈现明显的台阶状,滑坡变形与库水位变化具有明显的相关性。基于多年的专业监测成果,结合地质勘察、宏观变形迹象分析,本文对水库型滑坡的变形特点及水动力作用条件进行了分析,结果表明,白水河滑坡的变形主要受库水位下降的影响,库水位上升对滑坡变形有抑制作用,降雨对滑坡变形有一定影响。
The impoundment and water level rise of the Three Gorges Reservoir will change the hydrogeological conditions in the water-related landslide and affect the stability of the landslide, which often results in the resurgence of old landslides and the occurrence of new landslides. The Bai Shuihe landslide is a landslide with a large rock bed on the main stream of the Yangtze River. Since the Three Gorges Reservoir was impounded to 135 m in June 2003, the landslide has been aggravated. The deformation shows obvious steps. The deformation of the landslide and the change of reservoir water level are obvious Correlation. Based on many years of professional monitoring results, combined with geological survey and macro deformation analysis, this paper analyzes the deformation characteristics and hydrodynamic conditions of reservoir landslides. The results show that the deformation of Bai Shuihe landslide is mainly affected by the decline of reservoir water level. The rising of water level can inhibit the deformation of landslide, and the rainfall has certain influence on landslide deformation.