非典型隐伏岩溶发育特征及渗漏研究——以大雪山水库为例  

Development characteristics and leakage of atypical concealed karst:taking Daxueshan reservoir as an example

作　　者：代志宏 朱银红[2] 卢鹏 李正顺 赵锡荣 DAI Zhi-hong;ZHU Yin-hong;LU Peng;LI Zheng-shun;ZHAO Xi-rong(School of Management Science and Engineering,Guangxi University of Finance and Economics,Nanning 530003,China;College of Civil and Architectural Engineering,Guilin University of Technology,Guilin 541004,China;Nanning Exploration&Survey Geoinformation Institute Co.,Ltd.,Nanning 530022,China;China Energy Engineering Group Guangxi Electric Power Design Institute Co.,Ltd,Nanning 530007,China;Dali Investigation,Design&Research Institute of Water Conservancy and Hydropower,Dali 671014,China)

机构地区：[1]广西财经学院管理科学与工程学院,南宁530003 [2]桂林理工大学土木与建筑工程学院,广西桂林541004 [3]南宁市勘察测绘地理信息院有限公司,南宁530022 [4]中国能源建设集团广西电力设计研究院有限公司,南宁530004 [5]大理白族自治州水利水电勘测设计研究院,云南大理671014

出　　处：《桂林理工大学学报》2021年第3期518-524,共7页Journal of Guilin University of Technology

基　　金：广西科学研究与技术开发计划项目(桂科AA20302006);2021年度广西本科教育教学重点项目省级一流专业建设点(工程造价专业);南宁市科学研究与技术开发计划项目(GX20210093)。

摘　　要：提出了“非典型隐伏岩溶”的概念,其特征为:位于高原山区,库区碳酸盐岩地层所占面积及规模小,夹在两个隔水层之间,地表很难发现其迹象;由于岩溶体破碎、透水性强、地下水侵蚀基准面低、水力坡度大、上覆地层厚薄不一等因素,上部隔水层易被库水击穿。以云南大雪山水库为例,通过地质资料分析、水文地质调查、钻探、物探、区域水化学试验、同位素试验和示踪试验等手段,查明了渗漏发生的原因。该库区岩溶地质体岩性为石炭系下统平掌组灰岩、白云质灰岩等,上下隔水层分别为平掌组安山玄武岩和泥盆系下统温泉组砂、泥岩;水平向上,岩溶地质体夹在F_(3)断层和温泉组砂、泥岩之间,或与F_(3)断裂伴生;库水沿着地下岩溶管道由北向南直接穿过地表分水岭向南部泄露。由于库区碳酸盐岩破碎、透水性强、岩溶地下河管道复杂、深度超过100 m,因此建议采用水平铺盖方案或南北两侧的悬挂式防渗帷幕。The concept of“non-typical concealed karst”is put forward,which is characterized by its small area and scale of carbonate rock salt stratum in the reservoir area,and sandwiched between two water-resisting layers.Because of the factors such as broken karst,strong permeability,low base level of groundwater erosion,high hydraulic gradient and different thickness of overlying strata,the upper water-resisting layer is easy to be penetrated by reservoir water.Taking Daxueshan reservoir in Yunnan Province as an example,the causes of seepage are identified by geological data analysis,comprehensive hydrogeological survey,drilling,geophysical exploration,regional hydrochemical test,isotope test and tracer test.The karst geologic bodies in the reservoir area are composed of limestone and dolomitic limestone of the lower carboniferous Pingzhang Formation,the upper and lower water resisting layers are Anshan Basalt of the Pingzhang Formation and sand and mudstone of the lower Devonian Wenquan Formation,respectively.The karst geologic body is sandwiched between the F_(3)fault,the Wenquan Formation sand and mudstone,or associated with the F_(3)fault.The reservoir water is leaking from the north to the south through the surface watershed along the underground karst pipeline.Because the carbonate rock in the reservoir area is broken,the permeability of water is strong,the pipeline of karst underground river is complex and the depth is more than 100 m,so it is suggested to adopt the horizontal covering scheme or the hanging anti-seepage curtain on the north and south sides.

关 键 词：非典型隐伏岩溶 水库 岩溶渗漏 断裂 综合水文地质勘察 

分 类 号：P642.254[天文地球—工程地质学] TV697.32[天文地球—地质矿产勘探]