某水电站坝址河床承压水不同种类动态变化及关联特性研究

Different Dynamic Change and Correlation Properties of Riverbed Confined Water of a Hydropower Station Dam

水电站工程建设勘察论证过程中有时会遇到承压水,其形成与特定的地质环境相关联,承压水的类型及其动态变化特征等是需要研究的内容。以某峡谷区水电站坝址河床部位钻孔揭露的承压水为例,按揭露的出露状态进行了种类划分,根据种类和相应代表性钻孔观测资料论述其动态变化特征,在此基础上分析承压水的关联特性。结果表明:各种类承压水的水位、水量在某一时间达到基本稳定后随时间动态变化不明显,随江水和大气降水动态变化影响亦不明显,温度、pH值变化不大,保持相对稳定但各自不尽相同;河床部位各钻孔承压水不属于同一承压水含水系统,分属各自的含水系统与循环通道。

Take the example of confined water of drill-hole,the types of exposed outcrop state are divided.According to the type and the corresponding representation of borehole observations dynamic characteristics are discussed.On this basis correlation properties of confined water are analyzed.The results show dynamic changes in water level of the various types of confined water are not obvious,temperature and pH value remain relatively stable but each is different.Drilling confined water of riverbed site does not belong to the same confined water aquifer system,belongs to their respective aquifer system and circulation channels.