贵州省印江县余家滑坡发育特征及稳定性分析

Development Characteristics and Stability Analysis of Yujia Landslide in Yinjiang County,Guizhou Province

余家滑坡位于贵州省印江县板溪镇,2017年6月以来,受持续降雨影响,滑坡裂缝逐渐变宽加深,对滑坡体下方78户居民的生命财产安全造成威胁。在野外详细调查的基础上,分析余家滑坡发育特征,基于FLAC3D数值模拟对该滑坡稳定性进行分析。结果表明:余家滑坡为推移式土层滑坡;滑坡的主要变形区为基覆界面以上的堆积体,最大值位于坡体中部;应重视在强降雨、人类工程活动等诱发因素作用下,滑坡滑面的贯通及其导致的坡体失稳。

Yujia landslide is located in Banxi Town,Yinjiang County,Guizhou Province.Since June 2017,due to continuous rainfall,the cracks of Yujia landslide have gradually widened and deepened,posing a threat to the life and property safety of 78 households below the landslide body.Based on detailed field investigations,this article analyzes the development characteristics of the Yujia landslide and conducts stability analysis of the landslide using FLAC3D numerical simulation.The results indicate that Yujia landslide is a translational soil landslide,and the main deformation zone of the landslide is the accumulation above the foundation cover interface,with the maximum value located in the middle of the slope.Therefore,it should pay attention to the penetration of landslide sliding surfaces and the resulting slope instability under the influence of triggering factors such as heavy rainfall and human engineering activities.