库水位升降作用下库岸滑坡稳定性研究  

Stability Studies of Reservoir Landslide Under Reservoir Water Level Fluctuation

作　　者：宋丹青[1,2] 宋宏权[3] 

机构地区：[1]兰州大学土木工程与力学学院,甘肃兰州730000 [2]上海交通大学船舶海洋与建筑工程学院,上海200030 [3]河南大学黄河中下游数字地理技术教育部重点实验室,河南开封475004

出　　处：《东北大学学报（自然科学版）》2017年第5期735-739,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(41401107)

摘　　要：为研究库水位升降对库岸滑坡稳定性的影响,以九甸峡库区某滑坡为例,采用GPS对其外部进行变形监测,结合详细的现场调查及水库运营资料,同时针对库水位升降条件下利用Geo-slope分析库岸滑坡的稳定性变化规律.结果表明:库水位100~130 m阶段,库水位快速持续上升及下降将会引起滑体发生滑动;滑体稳定性随库水位下降速度增加而减小,库水位下降速度超过0.3 m/d时,滑体将会发生失稳;库水位上升速率大于0.4 m/d时,将会诱发滑体失稳;库水位连续快速升降也对库岸滑坡稳定性不利,库水位快速升降与滑体滑动存在滞后期.For studying the influence of reservoir water fluctuation on reservoir landslide stability,taking a landslide in Jiudianxia reservoir area as an example,the external deformation of landslide is monitored by GPS,and the change lawof landslide stability is analyzed in combination with detailed field investigation and reservoir operation data,which is also numerically analyzed by Geo-slope as well. The results showthat the landslide has three fast movements in phase of 100 ~130 m,and continuous rapid water rise and fall will trigger landslide movement. The landslide stability decreases with the increase of water fall speed,and the landslide will occur if water fall speed is more than 0. 3 m/d. The landslide also will occur when water rise speed is more than 0.5m/d. The landslide movement presents a typical time-dependent characteristics,and a lag time can be identified between rapid water fluctuation and landslide movement.

关 键 词：库水位升降 库岸滑坡稳定性 GPS监测 Geo-slope 

分 类 号：P642.22[天文地球—工程地质学]