碎石土滑坡稳定性与治理效果分析

Analysis on stability and treatment effect of gravel soil landslide

为了解碎石土滑坡治理前后的稳定性变化趋势,需要建立一种简单有效的治理效果评定方法。本文以江石桥碎石土滑坡群为依托,通过对其形成机制、不同条件稳定性系数及治理前后变形速率进行分析,评价了滑坡治理的效果。研究结果表明:地下水排泄通道受阻是碎石土滑坡形成的内在条件;降雨入渗导致碎石土滑坡稳定性系数急剧减小,加速滑坡的变形,导致碎石土滑坡失稳;阻断滑坡地表降雨入渗能有效提高碎石土滑坡的稳定系数。

In order to understand the stability change trend of gravel soil landslide before and after treatment,it is necessary to establish a simple and effective treatment effect evaluation method.Based on Jiangshiqiao gravel soil landslide group,this paper evaluates the landslide treatment effect by analyzing its formation mechanism,stability coefficient under different rainfall conditions and deformation rate before and after treatment.The results show that the obstruction of groundwater discharge channel is the internal condition for the formation of gravel soil landslide.Rainfall infiltration leads to the sharp decrease of the landslide coefficient of gravel soil,accelerates the instability deformation of landslide,and leads to the instability of gravel soil landslide.Blocking rainfall infiltration can effectively improve the stability coefficient of gravel soil landslide.