极端气候下湖南省某黏土滑坡特征与防治

Characteristics and Control of a Clay Landslide in Hunan Province Under Extreme Climate

湖南省地质灾害多发,且多为与斜坡稳定性相关的崩滑流。湖南省某黏土滑坡自2016年2月初发生局部滑动与垮塌等现象,后续持续发展。本文通过分析该滑坡特征和变形破坏成因,得出如下结论:边坡的初始变形破坏的形成因素包括地形地貌因素、岩性因素、持续强降雨、人类工程活动及极端气候下的冻融作用等;夏季暴雨期间变形加剧主要与强降雨有关;采用截排水工程、削方减载工程、坡脚挡土墙工程和监测工程相结合对该滑坡进行防治。

Geological disasters occur frequently in Hunan Province,and most of them are related to slope stability.A clay landslide in Hunan Province began to slip and collapse in early February 2016,and continued to develop.By analyzing the characteristics of the landslide and the causes of its deformation and failure,this paper draws the following conclusions:the formation factors of the initial deformation and failure of the slope included geomorphic factors,lithologic factors,continuous heavy rainfall,human engineering activities and freeze-thaw action under extreme climate,etc.The deformation intensification during summer rainstorm was mainly related to heavy rainfall.The landslide should be prevented and controlled by means of drainage engineering,reducing load engineering,retaining wall engineering and monitoring engineering.