鱼洞河滑坡稳定性三维极限平衡分析  

Stability Evaluation of Three Dimensional Limit Equilibrium on Yudonghe Landslide

作　　者：汪华斌[1] 徐瑞春[2] 姜清辉[3] 

机构地区：[1]中国地质大学,湖北武汉430074 [2]水利部长江委三峡勘测研究院,湖北宜昌443003 [3]武汉大学,湖北武汉430072

出　　处：《山地学报》2002年第4期497-501,共5页Mountain Research

基　　金：长江水利勘测委员会横向基金资助

摘　　要：结合三维极限稳定性评价算法 ,选取一定的参数对鱼洞河滑坡整体滑体、下段滑体和东边湾次级滑体在不同地下水位情况下的稳定性系数进行计算 ,结果表明鱼洞河滑坡整体滑体沿底滑带滑动时 ,最小稳定系数为 1.130 ;下段滑体最小稳定数为 1.12 1,基本反映该滑体稳定状况良好。东边湾次级滑体稳定性系数在 1.0左右 ,稳定性较差 。During of the stability evaluation, the whole sliding body, lower sliding body and eastern secondary sliding body were chosen as the objects of study After the parameters were selected correctly, the stability coefficients of different objects were calculated on different conditions of water level and on different sliding directions based on the 3D limit equilibrium method. Regarding to the whole sliding body, the smallest stability coefficient is 1.130 on the presupposition of sliding along bottom slide zone. With regard to the lower sliding body, the dangerous planes were repeatedly searched, and different stability coefficients were calculated on different dangerous planes with the presupposition of sliding along bottom slide zone. General speaking, the smallest stability coefficient of the lower sliding body is 1.121, which was ca-lculated on conditions of earthquake, on the sliding direction of 2～2, and on the 225m of water level, and the results reflected the lower sliding body was on well stable stage. As for the secondary landslide in the eastern, the stability coefficient is 1.0 or so on different conditions, which reflected this slide was at dangerous state and it was to fail again when the outside conditions changed. Therefore, it is necessary to pay much attention to the danger of surge resulted from secondary landslide in the eastern during the construction of project, and strengthen its deformation monitoring, indispensable prevention measures will be taken if possible.

关 键 词：鱼油河滑坡 三维极限平衡分析 稳定性评价 地下水位 稳定系数 

分 类 号：P642.22[天文地球—工程地质学]