水库岩溶渗漏勘察技术要点与方法研究

Research on Technical Points and Methods of Reservoir Karst Seepage Investigation

库区岩溶渗漏勘察是水库防渗处理的关键,文中结合多种勘察技术手段,准确分析库区地下水的迁移、补给、排泄,以及库区岩溶介质发育情况、岩溶渗漏方式和途径,并对渗漏情况进行评价。实践中,揭示无防渗帷幕的坝基渗漏严重,渗漏量达252.77 m^(3)/d,山脊渗漏量总计达607.67 m^(3)/d,其中,可溶岩渗漏量达556.2 m^(3)/d,占山脊渗漏总量的92.1%,而非可溶岩渗漏量均很小。由此可见,库区渗漏影响最大的是岩溶渗漏,应采取针对性措施进行防治和加固。

Karst seepage survey in the reservoir area is the key to the impermeability treatment of the reservoir.Combining various survey techniques and means,the migration,recharge and discharge of groundwater in the reservoir area,the development of karst media in the reservoir area,and the ways and means of karst seepage are accurately analyzed and the seepage situation is evaluated.In practice,It is revealed that the leakage of the dam base without impermeable curtain is serious,with the leakage amount reaching 252.77 m^(3)/d,and the total leakage of the ridge reaches 607.67 m^(3)/d,of which the leakage of soluble rock reaches 556.2 m^(3)/d,accounting for 92.1%of the total leakage of the ridge,while the leakage of non-soluble rock is all very small,it can be seen that karst seepage has the greatest impact on reservoir area,and specific measures should be taken to prevent and strengthen it.