云南省一把伞水库主封堵区岩溶渗漏条件与管道特征分析  

Analysis of karst leakage conditions and pipeline characteristics in the main blocked area of Yibasan reservoir,Yunnan

作　　者：宋晨 潘晓东[1,2] 刘天云 罗飞 曾洁[1,2] 彭聪 程瑞瑞[1,2] 张文平 SONG Chen;PAN Xiaodong;LIU Tianyun;LUO Fei;ZENG Jie;PENG Cong;CHENG Ruirui;ZHANG Wenping(Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics,MNR&GZAR,Guilin,Guangxi 541004,China;International Research Centre on Karst under the Auspices of UNESCO,National Center for International Research on Karst Dynamic System and Global Change,Guilin,Guangxi 541004,China;Institute of Water Conservancy and Electric Power Survey and Design,Wenshan,Yunnan 663000,China)

机构地区：[1]中国地质科学院岩溶地质研究所/自然资源部广西岩溶动力学重点实验室,广西桂林541004 [2]联合国教科文组织国际岩溶研究中心/岩溶动力系统与全球变化国际联合研究中心,广西桂林541004 [3]文山壮族苗族自治州水利电力勘察设计院,云南文山663000

出　　处：《中国岩溶》2024年第5期1088-1098,共11页Carsologica Sinica

基　　金：广西重点研发计划项目(桂科AB21196026);中国地质科学院岩溶地质研究所基本科研业务费项目(2022005);中国地质调查局地质调查项目“重点岩溶区及珠江流域水文地质与水资源调查监测”(DD20221758)。

摘　　要：水库渗漏是岩溶地区兴建水利枢纽关键的病害问题之一,以一把伞水库主封堵区为例,水文地质调查、地下水位动态监测、地球物理探测和钻探相互验证,分析主封堵区水文地质条件,识别岩溶渗漏管道位置及发育特征。结果表明:主封堵区岩溶渗漏带发育于泥盆系东岗岭组(D2d)较纯碳酸盐岩,SW至NE向压扭性断层构成南北隔水边界,东西两侧为透水地层,上游地下河至主封堵区汇流后又迅速分为南东、北东支流。岩溶渗漏带包括主管道以及北支管道,渗漏管道发育位置受断层作用控制显著。研究揭示了岩溶渗漏的季节变化规律,提出了主管道与北支管道的渗漏条件,并分析了渗漏管道分布特征、规模及充填性质,为一把伞水库主封堵区渗漏防范提供科学依据,并为岩溶地区类似渗漏病害问题的治理提供借鉴意义。Reservoir leakage is a significant challenge in the construction of water conservancy projects in karst areas.Yibasan reservoir is a key water source project planned for Wenshan Prefecture in Yunnan Province.It is a storage reservoir composed of 11 surface seasonal karst lakes,underground river pipelines,karst caves and fissures.The proposed storage capacity is nearly 90 million m3.The main blocked area is planned to be built at the concentrated distribution line of large depressions.Many large depressions are located in the upper reaches,while the height differences in the lower reaches are relatively gentle,with an overall arc length of nearly 800 m.The project is planned to be constructed with the use curtain grouting,flood discharge tunnel and other methods,with a total storage capacity of 11,412,600 m^(3).The presence of leakage zones in the main blocked area and their characteristics are critical to the success of sealing process.Taking the main blocked area of Yibasan reservoir as an example,the hydrogeological survey,dynamic monitoring of groundwater levels,and geophysical exploration and drilling have been employed in conjunction to analyze the hydrogeological conditions in the main blocked area and to identify the location and development characteristics of karst leakage.The results show that the karst leakage zone in the main blocked area is developed in the pure carbonate rocks of the Devonian Donggangling Formation(D2d).The lithology consists of thick layers of silty crystalline limestone,dolomitic limestone interbedded with thin layers of marl,and muddy limestone.The south-north water boundary is ormed by the SW to NE compression and torsional reverse fault,Water permeable strata are located on both sides of east and west.After the confluence of the upper reaches of the underground river to the main blocked area,the river rapidly divides into southeast and northeast tributaries.The F6 water-guiding fault in the direction of NW to SE crosses the main blocked area and opens the F4 and F5 fault planes.

关 键 词：岩溶渗漏 管道特征 地球物理探测 断层构造 一把伞水库 

分 类 号：TV697.32[水利工程—水利水电工程]