水库蓄水对库岸边坡稳定性的影响

采用一种新型的监测方法(GPS),以甘肃省九甸峡水库燕子坪滑坡为例,通过对滑坡的监测位移进行分析,定量化研究水库蓄水对库岸边坡稳定性的影响规律。研究结果表明:蓄水位70~100m阶段,蓄水对库岸边坡稳定性是不利的,蓄水至一定高度后,滑坡体趋于稳定;低蓄水位阶段,滑坡的稳定性受蓄水影响较小;水库蓄水引起的库岸失稳类型主要有3类:已有滑坡的复活滑动、形成新的库岸滑坡和库岸坍塌再造。

Influence of reservoir storage on stability of landslide

Taking an example of Yanziping Landslide in Jiudian Gorge reservoir in Gansu Province ,the paper applied a new kind of monitoring method (GPS) to analyze the law of influence of reservoir storage on landslide stability through the analysis of deformation monitoring. The results show that when the storage level is in the phase of 70 to 100 meters,the storage is unfavorable to the stability of reservoir landslide,but when the storage is in a certain height, the reservoir landslide will tend to stable;in low water level phase,the stability of landslide is less affected by reservoir storage; the main types of bank instability due to reservoir storage has three categories: resurrection sliding of preexisting landslide, new reservoir bank landslide and bank collapse.