双曲拱坝坝肩施工过程稳定性分析

Stability analysis of double-curvature arch dam abutment during construction process

在复杂高山峡谷地区,水电站的正常运行受很多因素影响,其中坝肩岩体的稳定性起至关重要的作用。以金沙江白鹤滩水电站为工程背景,运用MIDAS有限元软件建立坝肩三维地质模型,对拱肩槽开挖过程和筑坝过程进行模拟。根据数值模拟结果,对坝肩岩体在拱肩槽开挖过程和筑坝过程的应力位移变形情况进行了分析,得出结论:坝肩岩体整体在开挖和筑坝过程处于稳定状态。

In complex mountainous areas,the normal operation of the hydropower station is affected by many factors, and the stability of the dam abutment rock mass is crucial. In this study, we took the Baihetan Hydropower Station on the Jinsha River as research project,established a 3D geological model of the dam abutment with MIDAS, and simulated the spandrel groove excavation process and the damming process. Based on numerical simulation results ,we analyzed the stress displacement and deformation of the dam abutment rock mass during the spandrel groove excavation process and the damming process. In conclusion, the dam abutment rock mass was stable during the construction process.