摘要
为给旭龙水电站大坝建基面的选择提供地质依据,采用钻孔声波测试、压水试验及钻孔内岩心获得率、地应力测试等方法对河床坝段建基岩体进行了前期勘察,结果表明:2 095 m以下未卸荷完整岩体的工程地质性状较好,是良好的大坝建基岩体。建议以2 095 m高程为旭龙水电站大坝河床段建基面设计高程,同时对局部完整性较差和建基面附近的松弛岩体进行处理,以提高建基岩体完整性。
In order to provide detailed geological basis for the selection of dam foundation surface, borehole acoustic wave test, water pressure test, core recovery percentage and in-situ stress test were adopted in the early stage of survey for rock mass of the riverbed.The results showed that: the unloading rock mass below level 2 095 m has good engineering geological properties and is appropriate for dam construction.The elevation of 2 095 m was recommended for the design elevation of foundation surface of dam on riverbed section of Xulong Hydropower Station, and the rock mass with poor integrity should be handled to improve the rock mass integrity.
作者
谭朝爽
TAN Chaoshuang(Changjiang Three Gorges Survey and Research Institute Limited Company,Wuhan 430074,China)
出处
《水利水电快报》
2022年第9期13-15,21,共4页
Express Water Resources & Hydropower Information
关键词
建基面选择
坝基岩体质量
地应力测试
岩体纵波波速
旭龙水电站
foundation surface selection
rock mass quality of dam foundation
geo-stress test
longitudinal wave velocity of rock mass
Xulong Hydropower Station
