米易县某滑坡成因机制及其稳定性分析

Research on formation mechanism of alandslide in Miyicounty and its stability analysis

对米易县某滑坡的变形特征、成因机制及稳定性进行了定性定量分析,得出结论:1)该滑坡为大型土质滑坡,滑坡前缘地形构成临空面,为滑坡的滑动前移提供了有利的空间条件;2)滑坡前缘不能提供有效的支撑阻力,滑坡体随着蠕动变形的过程中,滑坡体前缘将会不停的向下滑动,尤其在强降雨的天气下,有产生较大规模整体滑动的可能。最后,对该滑坡治理措施建议采用支挡结构、加强排水和坡面卸载及防护的综合治理。

Based on the qualitative and quantitative analysis of the deformation characteristics, formation mech- anism and stability of a landslide in Miyi county, the following conclusions are given： 1 ） The landslide is large-scale soil landslide, the free face formed by the frontal topography of the landslide provides favorable space conditions for sliding and forward movement of the landslide ; 2） The frontal part of landslide can＇ t provide effective support resist- ance ,with the creep deformation process, the landslide mass will keep sliding downward, and especially in the work- ing conditions of heavy rainfall, there is a possibility of large-scale overall sliding. Finally, it is recommended that the comprehensive control measures of adopting supporting （retaining） structure, strengthening the drainage and slope unloading and protection should be taken for the landslide.