黄莲树滑坡形成机理及稳定性分析

Formation mechanism and stability analysis of Huanglianshu landslide

以典型碎石土堆积层滑坡黄莲树滑坡为研究对象,深入分析了降雨诱发滑坡滑动的形成机理,采用地学模拟软件GeoStudio中的SEEP/W模块和SLOPE/W模块建立相应的模型,根据诱发滑坡时的降雨量设置不同降雨工况,将瞬态孔隙水压力分布用于滑坡极限平衡稳定性分析中,从而确定不同工况下的滑坡稳定性系数,从稳定性分析结果可以看出该滑坡对暴雨及大雨响应敏感,降雨强度及降雨量越大稳定性下降越明显。该滑坡的成灾机理及滑动过程为类似滑坡险情出现时的应急处置及防治提供了可靠的借鉴经验。

Based on the study of Huanglianshu landslide, which is a typical gravel soil accumulation landslide, the paper presents a deep analysis on the formation mechanism for rainfall-induced landslide. The model is established using geoscience simulation software GeoStudio including the SEEP/W module and SLOPE/W module. The distribution in transient pore water pressure is applied for stability analysis on the landslide corresponding to the different rainfall conditions based on the rainfall which induced landslide to determine the stability coefficient of landslide under different working conditions. It can be seen from the results of the stability analysis that the landslide is sensitive to rainstorm or heavy rain. The greater intensity the rain falls, the more significantly the stability decreases. The disaster mechanism and the impact on the surroundings associated with sliding process of landslide could provide a reliable reference for emergency treatment and prevention of similar landslide.