摘要
以三峡水库麻地湾滑坡为例,运用Geo-studio系列软件,分析该类缓地形阻滑段滑坡在三峡水位变动乃至降幅增加条件下的变形特征与稳定性改变情况。通过分析位移、稳定性与库水位变动的关系,得出该滑坡在水位下降至150 m时为最不利状态。最大变形位置均位于水位变动带,但在降雨时滑坡后缘也会出现轻微变形。通过计算不同日降幅,结合分析稳定性～时间曲线分析得出该滑坡承受日降幅阈值为1. 6 m/d。
Taking an example of Madiwan landslide,using the Geo-studio software to simulate impact on the landslide when the decline rate accelerated.Through analyzing the stability and the displacement vs.time field,it is concluded that this type of landslide is the most unfavorable condition when the water level drops to 150m.The deformation position is located in the water level change belt,and slight deformation occurs at the trailing edge of the landslide during rainfall.In addition to the landslide engineering the effectiveness of control measures under the condition of the speed increase.Combining stability vs.time analysis,acceptable daily drop rate of water level threshold value of remedied landslide equal 1.6 m/d is calculated.
作者
杨帆
YANG Fan(Chengdu Center of Hydrogeology and Engineering Geology of Sichuan Bureau of Geology & Mineral Resources,Chengdu 610000,China)
出处
《人民珠江》
2019年第1期86-91,共6页
Pearl River
关键词
三峡库水升降
日降幅
滑坡稳定性
Three Gorges Reservoir
water lifting
daily decline
landslide stability
