岩溶型地下坝帷幕质量检测与防渗性能评估研究  

Study on Quality Inspection and Anti-Seepage Performance Evaluation of Karst Underground Dam Curtain

作　　者：张凯[1,2] 苏正洋[1] 刘成栋 沈光泽[1] 焦洁 ZHANG Kai;SU Zhengyang;LIU Chengdong;SHEN Guangze;JIAO Jie(Nanjing Hydraulic Research Institute,Nanjing 210029,China;Dam Safety Management Center of the Ministry of Water Resources,Nanjing 210029,China;Hohai University Design and Research Institute Co.,Ltd.,Nanjing 210098,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]水利部大坝安全管理中心,江苏南京210029 [3]河海大学设计研究院有限公司,江苏南京210098

出　　处：《人民珠江》2020年第8期75-80,97,共7页Pearl River

基　　金：国家重点研发计划(2016YFC0401603);国家自然科学基金面上项目(1779154)。

摘　　要：岩溶型地下坝因结构和所处环境特殊,其帷幕质量检测及防渗性能评估工作存在较多难题。以中国西南地区某典型岩溶型地下坝防渗系统为研究对象,利用高密度电阻率法初步查明防渗帷幕的分布和薄弱部位,并通过局部钻孔压水试验进一步验证高密度电阻率法结果准确性,后结合廊道析出物热重法试验对析出物成分和溶蚀类型进行分析。研究成果为当前岩溶地下坝帷幕质量检测与防渗性能评估工作提供可行方案,对岩溶型地下坝的推广应用及其运行期安全保障具有工程借鉴意义,为建立并完善岩溶地区地下水库的防渗体性能评价体系及监控机制提供重要参考。There are many problems in the quality inspection and anti-seepage performance evaluation of karst underground dam s curtain because of its special structure and environment.Taking a typical karst underground dam seepage prevention system in southwest China as the research object,this paper identifies the distribution and weak parts of the anti-seepage curtain through the high-density resistivity method,further verifies the accuracy of results from high-density resistivity method through local water pressure test in borehole,and analyzes the composition and corrosion type of precipitates by precipitation thermogravimetry.This study provides a feasible plan for the current quality inspection and anti-seepage performance evaluation of karst underground dam,has a strong engineering reference significance for the popularization and application of karst underground dam and its safety assurance in the operation period,and also serves as an important reference for the establishment and improvement of the performance evaluation system and monitoring mechanism for the seepage control of underground reservoirs in karst areas.

关 键 词：岩溶型地下坝 帷幕质量检测 高密度电阻率法 溶蚀分析 防渗性能评估 

分 类 号：TV223.43[水利工程—水工结构工程]