地下水封洞库水幕系统试验综合分析

Comprehensive analysis of water curtain system test for underground storage in rock caverns

大型地下水封洞库项目建设过程中的关键点与难点是对地下水的控制,为了给设计与施工工作提供良好的数据支持与技术指导,结合国内首个大型地下水封洞库项目,在水幕系统内开展了大量的水文试验以及各种水文监测工作。将大量的试验数据进行统计分析,可得知洞库上覆岩体的渗透系数、围岩的富水程度及稳定静水压力是极不均匀的。利用部分统计数据计算了洞室的涌水量,将理论计算结果与实际监测数据进行对比,得知理论计算量普遍大于实际监测数据,而利用地下水动力学方法计算的洞室涌水量与实际相接近。可为后期地下水封洞库建设提供工程借鉴。

The key point and difficulty in the construction of underground structure of large underground storage in rock caverns is the groundwater control. In order to provide the favorable data for design and guidance of the construction work,combining with the domestic first large underground storage in rock caverns project,a large number of hydrological tests as well as a variety of hydrological monitoring work have been carried out within the water curtain system. Through a lot of statistical analysis on the experimental data,it is known that the rock mass permeability coefficient,the water abundance and the stable hydrostatic pressure of surrounding rock are highly uniform. By using some statistical data for the theoretical calculation of water inflow,the results of theoretical calculation are compared with the actual monitoring data. It is concluded that the theoretical calculation is generally greater than the actual monitoring data,and the cavern water inflow calculated by groundwater dynamics method is closer to the reality,which could provide the reference for the construction of underground storage in rock caverns in future.