周宁水电站地下厂房系统渗控优化设计及水力劈裂安全分析

Seepage Control Optimization Design of Underground Plant System in Zhouning Hydropower Station and Its Safety Analysis of Hydraulic Fracturing

鉴于周宁水库下游较远距离处的地下厂房系统的排渗优化设计方案及水力劈裂安全分析的重要性,在分析周宁水电站地下厂房系统的水文地质工程地质条件基础上,分析了稳定渗流有限元计算基本格式,构建了各向异性介质的排水孔模型及地下厂房系统的渗流有限元计算模型,并将该模型运用到周宁水电站地下厂房系统10种渗排组合方案中,进而评价了地下工程的水力劈裂安全性,为地下厂区建筑物结构及渗控布置的设计提供最优方案,可为类似工程的渗控布置提供参考。

For the importance of the drainage optimization design and the saiety analysis oi hydrauhc iracturing ot underground plant system far away from downstream barrage, steady seepage finite element calculation scheme is analyzed and the drainage holes model of percolation anisotropic media and seepage finite element calculation model of underground plant system are constructed based on the hydrogeological and engineering geological conditions of underground plant system in Zhouning hydropower station. And then the model is applied to 10 seepage discharge scenario schemes of underground plant system in Zhouning hydropower station. Finally, the safety of hydraulic fracturing of underground engineering is evaluated to provide the best solutions for underground plant structure and the layout design of seepage control, which may provide reference for similar projects＇ layout of seepage control.