地下水封洞库工程地质勘察技术方法与应用

Method and application of engineering geological survey for underground storage in rock caverns

近年来,通过对我国地下水封洞库工程建设经验的积累,为高效准确地查明拟选库址区的工程地质条件,可采用工程地质调查、智能钻孔成像、Q系统法等综合工程勘察方法。本文结合国内某大型地下水封洞库工程的成功建设经验,首先通过详尽的地面工程地质调查同时结合钻孔深部岩体结构信息进行综合分析,总结出库址区岩体结构规律,成功建议了最佳洞室轴线布置方案,取得了巨大的社会经济效益;然后将目前常用的几种围岩分类方法进行对比分析,总结出了几种围岩分类方法的优缺点,提出Q系统法在地下水封洞库项目中应用的优势性。

In recent years, through the accumulation of engineering construction experience of underground water-sealed caverns in China, the comprehensive engineering investigation methods such as engineering geological survey, intelligent borehole imaging and Q system method can be used to efficiently and accurately identify the engineering geological conditions in the site area of the proposed selected caverns. Combining with the domestic experience in the successful construction of a large underground storage, through the ground of the detailed engineering geological investigation and combined with the drilling information of deep rock mass structure and the comprehensive analysis, the rock mass structure regularity of the site area is summarized, the best success cavity axis is suggested, and the great social and economic benefits are made. Then, compared and analyzed several commonly used classification methods of surrounding rock, the advantages and disadvantages of the methods are summarized, and the advantages of Q system method in the application of underground water sealed cavern project are proposed.