某水库工程枢纽区高边坡稳定性分析

Stability Analysis of High Slopes in the Hub Area of a Reservoir Project

摘要:

库岸边坡稳定性分析是枢纽区勘察的重要内容之一，事关施工期及运行期安全。通过赤平投影对该水库枢纽区边坡稳定性进行了定性分析，分析结果表明大坝趾板及溢洪道边坡均存在不同程度的失稳现象。针对性地对边坡采取挂网喷射混凝土措施处理后，采用理正岩土计算软件中的极限平衡法对支护后的边坡稳定性进行了定量计算，计算结果表明采取挂网喷射混凝土支护措施后，边坡处于稳定状态，进一步证实了支护的可靠性，同时也为类似工程的边坡稳定性分析及支护提供参考与借鉴。

Abstract:

The stability analysis of reservoir bank slopes is one of the important contents in the survey of hub areas, which is related to the safety during the construction and operation periods. The qualitative analysis of the slope stability in the reservoir hub area was carried out by stereographic projection, and the results showed that the slopes of the dam toe slab and spillway had different degrees of instability. After targeted treatment of the slopes with the measure of shotcrete with mesh, the limit equilibrium method in Lizheng Geotechnical Calculation Software was used for quantitative calculation of the stability of the supported slopes. The calculation results indicated that the slopes were in a stable state after the shotcrete with mesh support measures were adopted, which further confirmed the reliability of the support and provided a reference for the stability analysis and support of similar engineering slopes.