库水位升降作用下铅厂沟滑坡稳定性研究

以云南观音岩水电站右岸铅厂沟滑坡为例，在现场地质调查的基础上，通过室内试验和反演的方法确定滑坡岩土体物理力学参数，运用Geo－Studio计算滑坡体在不同工况下的安全系数。结果表明，在原河床水位下，铅厂沟滑坡体稳定性较好。水库蓄水后，随着库水位升高，铅厂沟滑坡体稳定性会降低。当库水位骤降时，坡体稳定性亦会略微下降。若遇暴雨或地震等恶劣状况，坡体稳定性会大幅度降低。对此提出了削坡减载的治理措施，并对治理后的边坡进行稳定性分析。结果表明，经削坡治理后，坡体稳定性有较大提高，满足相应的安全储备要求。

Stability Analysis of Qianchanggou Landslide Mass under Fluctuation of Reservoir Water Level

Stability of the Qianchanggou landslide mass on the right bank of the Guanyinyan hydropower station in Yun -nan province is analyzed .Physical and mechanical parameters of the rock and soil in the landslide mass are determined through in-situ geological investigation , laboratory experiments and back calculation .Geo-Studio software is adopted to calculate the safety factors of the slope under different conditions .Results show that the Qianchanggou landslide slope is stable in the original riverbed water level condition .After impoundment of the reservoir , stability of the slope reduces with the water level rises .When the water level drops suddenly , the stability of the slope will decline slightly .While un-der extreme adverse conditions such as a storm or earthquake , the slope stability will be greatly reduced .Then, a treat-ment measure of slope cutting is proposed .It shows that the stability of the slope improves greatly after the cutting and meets the safety requirement .