广西龙州金龙水库岩溶渗漏分析与治理

渗漏是金龙水库多年来未能解决的主要问题,由于渗漏,水库蓄水量远远达不到设计库容并导致坝体产生坍塌,直接威胁到水库大坝及下游居民的安全.通过对区内岩体结构、构造断裂与岩溶发育的形态特征等进行分析,结合钻探和跨孔无线电波透视综合研究,该库渗漏主要受区域构造和岩溶发育所控制.渗漏主要分布在主、副坝及东南段的库尾端,以集中管道渗漏为主,其中主坝右肩最为严重,占渗漏总量的62.6%.根据产生渗漏的条件与分布特征,应采用回填、帷幕灌浆和铺盖相结合的综合治理方法进行防渗处理.

Analysis and control of karst leakage of Jinlong Reservoir in Longzhou, Guangxi

The key problem of leakage in Jinlong Reservoir has yet to be resolved..Impoundment is far under its designed storage capacity because of leakage leading to collapse of dam body and threatening the safety of the dam and residents in backward position.Leakage control is important in the reservoir's well function.It is put forward that the feature of regional tectonics and karst development control the leakage of the reservoir based on the analysis of rock structure,tectonic fractures and configuration characteristics of karst with combination of drilling and radio wave prospective of striding boreholes.Leakage mostly distributes in the main body,subsidiary dam and southeastern part of the reservoir.Mass conduit leakage happens as the primary mode.The leakage in the right part of the main dam body is most serious,accounting to 62.6 percent of the gross leakage.Comprehensive measures of leakage resistance should be adopted such as backfilling,grouting heavy curtain and covering bedrock according to the condition and distribution characteristics of leakage.