复杂水文地质条件的库盆防渗方案研究

Study on the seepage control scheme of reservoir basin with complex hydrogeological condition

洪屏抽水蓄能电站上水库断层发育,局部库盆与地下厂房存在水力联系,水文地质条件较为复杂。针对上水库水文地质条件,综合应用示踪试验、地下水位长期观测等勘测方法对断层的渗透特性、渗漏范围进行研究。在对水文地质条件、建筑物运行安全要求等深入研究的基础上进行水文地质分区设计和防渗功能分区设计,并以此为基础综合考虑建筑物运行要求、运行管理风险等因素进行防渗方案选择。工程最终选择主副结合的防渗体系,该防渗体系具有投资相对较省、施工质量控制要求较低、运行风险相对较小等优势。根据电站初期蓄水监测成果,防渗效果满足电站要求。

Because of more faults in the reservoir basin and the seepage channel exists between local basin and underground powerhouse,the hydrological conditions of the upper reservoir of Hongping pumped storage power station are very complex.According to the hydrogeological conditions of the reservoir,the method of tracer test and long-term observation of underground water level survey were used to study the seepage properties of faults and seepage range.Base on the intensive study of the hydrological conditions and safety operation requirements of buildings,the hydrogeological zoning and seepage control function zoning were designed. On the basis of this,considering the requirements of building operation,operational management risk and other factors to select the anti-seepage scheme. Finally,the anti-seepage system of the combination of the main and auxiliary was selected. This seepage control system has the advantages of relatively low investment,low construction quality control requirements,relatively small operational risk and so on. According to the monitoring results,the seepage control effect meets the requirements of the power station.