降雨对松散堆积体滑坡稳定性影响探讨——以贵州省沿河土家族自治县为例

An Approach to Influence of Rainfall on Soil Landslide Stability ——By the example of Yanhe Tujia Autonomous County, Guizhou

降雨是引发滑坡灾害的主要原因之一。通过对沿河土家族自治县具代表性的四个松散堆积体滑坡的分析,认为最大降雨量与滑坡的稳定性系数、滑面倾角均成反比,而滑带土内摩擦角增加时,滑坡启动需要的降雨强度就越大,成正比。其认识与目前该类滑坡的监测数据变化特征总体相吻合。

Rainfall is one of the main causes for the landslide. The study of the four representative soil landslides in the region shows that the maximum rainfall has an inverse relationship with the stability coefficient of the landslide and the dip angle of the slide surface, that is, the smaller the stability coefficient of the landslide. However, when the inner friction angle of the slide surface increases, the rainfall intensity required for the start of the landslide is greater.