湖南衡南茅市镇大兴铺组滑坡发育特征与稳定性评价

Landslide development features and stability evaluation of Daxingpu formation in Maocheng town,Hengnan County,Hunan Province

研究区内地质环境条件复杂,第四系覆盖层厚度较薄,基岩出露面积大,属典型的红层岩质滑坡。本文采用稳定性极限平衡法分析该滑坡的空间形态、物质组成和变形特征,计算天然工况及暴雨工况下滑坡的稳定性,得出在天然工况下为基本稳定状态,在暴雨工况下为不稳定状态的结论;提出通过削坡减载+修建挡墙+抗滑桩+地表截、排水沟工程对坡体进行整体防护,并与四周植被种植等辅助治理工程相结合的滑坡防治措施建议,为该滑坡的治理提供了技术依据和参考。

The geological environment in the study area is complex.The Quaternary overburden is thin,and large areas of the bedrock are exposed.It is a typical red rock landslide.Based on the stability limit equilibrium method to analyze the spatial form,material composition and deformation features of the landslide,this paper calculated the stability of the landslide under natural and rainstorm conditions.It was obtained that the landslide showed basic stability under natural conditions,while it was unstable under rainstorm conditions.The paper proposed the measures of landslide prevention and control including cutting slope and unloading,retaining walls,anti-slide pile and drainage ditch,combined with auxiliary control projects such as vegetation planting,which provided technical basis and reference for the treatment of the landslide.