基于库水作用分区的浮托减重型滑坡稳定性分析

Stability Study of Buoyancy Weight Loss Landslide Based on Reservoir Water Action Zoning

针对浮托减重型滑坡,以库水位变动作用区域为依据,将滑坡划分为A、B、C等3个库水作用区域。应用Geostudio有限元软件,研究不同库水作用区域对浮托减重型滑坡稳定性的影响。结果表明,滑坡稳定性系数对不同库水作用分区的响应也不同,A区浮托力不利于滑坡稳定,B区浮托力对滑坡稳定性的影响较小,C区浮托力利于滑坡稳定;库水位升降条件下,在浮托减重型滑坡A区升水、B区和C区降水时,滑坡整体稳定性系数减小,最不利于滑坡稳定,应加强对这3种工况的滑坡变形监测预报。

In light of buoyancy weight loss landslide,the landslide is divided into three reservoir water action zones of A,B and C based on the affected zoning of reservoir water level fluctuation.The Geostudio finite element software is used to study the impact of different reservoir water action zones on the stability of buoyancy weight loss landslide.The results show that the landslide stability coefficient has different response to different reservoir water zoning,the floating force in Zone A is not conducive to the stability of landslide,the floating force in Zone B has little effect on the stability of landslide,and the floating force in Zone C is beneficial to the stability of landslide.Under the conditions of reservoir water level fluctuation,the overall stability coefficient of the buoyancy weight loss landslide is reduced when the water in Zone A is lifted and the precipitation is occurred in Zone B and C,which are the most unfavorable for the stability of landslide.The landslide deformation monitoring should be strengthened under these three conditions.