库水位下降及极端降雨作用下白家包滑坡的稳定性演化  

Stability Evolution of Baijiabao Landslide under Effects of Reservoir Water Level Decline and Extreme Rainfall

作　　者：夏炳起 杨背背 XIA Bingqi;YANG Beibei(School of Civil Engineering,Yantai University,Yantai 264005,China)

机构地区：[1]烟台大学土木工程学院,山东烟台264005

出　　处：《烟台大学学报(自然科学与工程版)》2025年第2期156-164,共9页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：山东省自然科学基金资助项目(ZR2021QD032)。

摘　　要：为研究库水位下降联合降雨作用下滑坡渗流场及稳定性响应规律,以三峡库区白家包滑坡为例,采用Geo-Studio有限元分析软件模拟库水位以0.6、1.0、1.2 m/d以及叠加50年重现期极端降雨共计6种组合工况条件下的滑坡渗流场并计算其稳定性系数。结果表明:随着库水位下降,地下水位线呈现上凸下凹的趋势,稳定性系数则表现为先减小后增大;当叠加极端降雨时,随着库水位下降速率增大,滑坡稳定性变化更加显著。To study the response of the seepage field and stability of a landslide under the combined effects of reservoir water level decline and rainfall,this paper examines the Baijiabao landslide in the Three Gorges Reservoir Area.Using Geo-studio finite element analysis software,the seepage field of the landslide was simulated under six conditions with reservoir water level declining at rates of 0.6 m/d,1.0 m/d,and 1.2 m/d,combined with extreme rainfall with a 50-year return period,and the stability coefficient was calculated.Results show that as the reservoir water level decreases,the groundwater level profile exhibits convex and concave patterns,while the stability coefficient initially decreases and then increases.When extreme rainfall is superimposed,the stability of the landslide shows more significant changes as the rate of reservoir water level decline increases.

关 键 词：白家包滑坡 库水位下降 降雨 渗流场 稳定性 

分 类 号：P642.22[天文地球—工程地质学]