基于钻孔电视和声波测试的某地下水封洞库岩体质量初步评价

Preliminary evaluation for rock mass quality of certain underground water enclosed cavern based on borehole television and sonic testing

钻孔电视测试和声波测试作为定量或准定量的测试手段,可为岩体质量评价提供准确的数据,已被广泛应用于地下工程勘察中。在某拟建地下水封洞库选址勘察中,对拟选库址区布置的两个钻孔进行了钻孔电视测试和声波测试,获取了大量有效可视的钻孔岩芯定量数据和岩体波速数据。通过数理统计的方法对这些测试数据进行了分析,并运用改进的地下水封洞库岩体质量分级体系(UWCQ)对钻孔深部岩体质量进行了初步评价,评价结果可为洞库选址和后续设计提供重要决策依据。

As the quantitative or semi-quantitative testing methods, the borehole television and the sonic testing can provide the accurate data for the evaluation of rock mass quality, which have been widely used in underground engineering survey. In the siting investigation of certain proposed underground water enclosed cavern, two drill holes have been placed in the proposed area for the borehole television and the sonic testing, and a mass of effective and visible core quantitative data and rock mass velocity data are obtained. The testing data are analyzed by using the method of mathematical statistics, and then an improved UWCQ （underground water enclosed cavern quality） grading system is used for the preliminary evaluation of the drilling deep rock mass. The evaluation results can offer important decision-making basis for the cavern site selection and subsequent design.