某水电站库区边坡稳定性及变形失稳机制研究

某水电站库区边坡变形体在水库蓄水后出现持续变形,且变形速率较大。为揭示该边坡在复杂孕灾环境下的失稳破坏机制及稳定性特征,结合该边坡监测数据、地质构造及外界环境变化情况,从边坡灾变机制及稳定性特征出发,探讨在复杂地质条件、水位变动等致灾因子作用下边坡的失稳模式、破坏机制、渐进失稳过程及失稳后风险,同时也对边坡失稳后的风险进行初步评估,认为该边坡仍处于加速变形且不收敛状态,风险较大,结果可为该边坡后续风险预警管理、工程加固处理等提供参考。

Study on Slope Stability and Deformation Instability Mechanism in Reservoir Area of a Hydropower Station

The slope deformation of a certain hydropower station occurs continuously after reservoir impoundment, and the deformation rate is relatively high. In order to reveal the failure mechanism and stability characteristics of the slope in the complex disaster-prone environment, based on the monitoring data, geological structure and changes of the external environment of the slope, starting from the disaster mechanism and stability characteristics of the slope, this paper discusses the failure mode of the slope under the action of the disaster-provoking factors such as complex geological conditions, water level changes and so on. The failure mechanism, progressive instability process and post-instability risk are also preliminarily assessed. The assessment shows that the slope is still in accelerated deformation and non-convergence state, and the risk is high. Relevant research results can provide reference for risk early warning management and engineering reinforcement treatment of the slope.