综合物探在水库渗漏探测中的应用

doi:10.11720/wtyht.2020.1425

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摘要

受右坝肩正断层F2的影响,某水库岩溶发育,一直存在渗漏问题,经多处防渗处理,问题依然存在且日趋严重。本文综合采用流场法、自然电场法、高密度电阻率法对该水库渗漏进行了探测。发现老隧洞封堵质量较差,存在渗漏问题,并导致其下游侧坝体集中渗漏和大面积散浸;大坝坝体中部存在从上游坝坡至下游渗漏通道,是坝体下游二级坝坡出现散浸的主要原因;大坝右岸低矮山体存在渗漏入口,并可能与下游山脚的泉水点相连通;大坝右坝肩F2断层带防渗性差,存在与下游断层露头集中渗漏点相通的渗漏通道。此次探测结果表明:综合物探法能较准确获得水库渗漏源、渗流通道等位置信息。

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	姚纪华
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	宋文杰
	刘媛
	赵文刚
	吕慧珠

关键词 ：渗漏探测, 水库, 流场法, 自然电场法, 高密度电阻率法, 渗流通道

Abstract：

Influenced by normal fault F2 of right abutment,karst is extensively developed in a reservoir and, as a result, there exists the leakage problem. Although several anti-seepage treatments have been conducted,leakage problem still exists in the near-dam reservoir area,and the situation has been getting worse and worse. In this study. the seepage of the reservoir was detected by flow field method,natural electric field method and high density resistance method. According to the results obtained, comprehensive geophysical prospecting method can accurately obtain the location information of seepage source and seepage channel of the reservoir; the sealing quality of old tunnels is poor and there are leakage problems, which also leads to concentrated seepage and large-scale scattered immersion of the downstream side dam body; the low mountain body on the right bank of the dam has seepage entrance and may be connected with the spring water point at the foot of the downstream mountain; the F2 fault zone on the right abutment of the dam has poor imperviousness,and there exists a leakage passage connected with the concentrated seepage points at the outcrop of downstream faults.

Key words： seepage detection reservoir flow field method natural electric field method high density resistivity method seepage channel

收稿日期: 2019-08-29 出版日期: 2020-04-22

P631

基金资助:湖南省重大水利科技项目(XSKJ2018179-33);湖南省重大水利科技项目(湘水科计[2017]230-30);湖南省一般水利科技项目(XSKJ2018179-44);湖南省一般水利科技项目(XSKJ2018179-46);湖南省一般水利科技项目(湘水科计[2016]194-36)

作者简介: 姚纪华(1986-),男,湖南郴州人,硕士,工程师,主要从事水工环地质应用与研究工作。Email: yjh860716@163.com

引用本文:

姚纪华, 罗仕军, 宋文杰, 刘媛, 赵文刚, 吕慧珠. 综合物探在水库渗漏探测中的应用[J]. 物探与化探, 2020, 44(2): 456-462.
Ji-Hua YAO, Shi-Jun LUO, Wen-Jie SONG, Yuan LIU, Wen-Gang ZHAO, Hui-Zhu LYU. The application of comprehensive geophysical exploration method to leakage detection of a reservoir. Geophysical and Geochemical Exploration, 2020, 44(2): 456-462.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1425 或 https://www.wutanyuhuatan.com/CN/Y2020/V44/I2/456

Fig.1 物探法测线现场布置及库坝区渗漏出入口示意

Table 1 工程区岩土体电阻率

Table 2 主要探测方法和仪器设备

Fig.2 大坝Ⅰ、Ⅱ、Ⅲ测线自然电位曲线

Fig.3 大坝α测线高密度电阻率反演结果

Fig.4 大坝β测线高密度电阻率反演结果

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