芝瑞抽水蓄能电站上水库渗漏分析

Seepage Analysis on the Upper Reservoir in Zhirui Pumped-storage Power Station

芝瑞抽水蓄能电站上水库库区基岩为玄武岩,柱状节理发育,不同期次玄武岩之间为混合土碎石层,混合土碎石层组成物复杂,以地下水发育特征为切入点,通过分析地下水位埋深、压水试验成果、柱状节理与各层混合土碎石联系方式,得出上水库区柱状节理与混合土碎石层组成的庞大网络是地下水存储、运移的主要区域,水库蓄水后,存在库水渗漏的工程地质问题。

In Zhirui Pumped-storage Power Station, the bedrock on the upper reservoir area is detected as basalts with the development of columnar joint. The basalts ol varying ages are comprised ol mixed layers with soil and crushed stone, which exhibit complex components. Derived from the characteristics of groundwater development, the relationship be-tween each mixed layer and some key factors is investigated, including groundwater depth,water pressure tests, and co-lumnar joint structure. Experimental results show that the columnar joints united with mixedlayers on the upper reservoir region develop into a gigantic network,which is the dominant region for the storage and migration of the underground wa-ter. Reserving water in the reservoir triggers a series of engineering geological problems including the water leakage.