高密度电法与伪随机流场法在某水库渗漏探测中的应用  

Application of High-density Resistivity Method and Pseudo-random Flow Field Method in Leakage Detection of a Reservoir

作　　者：牛志杰 祁之来 赖胜 杨卫 岳想平 Niu Zhijie;Qi Zhilai;Lai Sheng;Yang Wei;Yue Xiangping(Northwest Engineering Corporation Limited,Xi’an Shaanxi 710199,China;Water Affairs Bureau of Ping’an District,Haidong Qinghai 814000,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710199 [2]青海省海东市平安区水务局,青海海东814000

出　　处：《工程地球物理学报》2025年第2期183-190,共8页Chinese Journal of Engineering Geophysics

基　　金：中国地质调查局地质调查项目(编号:DD20190266)。

摘　　要：青海某小型水库在蓄水位增加过程中,坝后量水堰渗水量显著增大,下游办公楼东北侧坡脚处有水渗出,并在楼北侧形成大面积积水区域,并随着蓄水位的上升而愈发严重。基于电性差异以及渗流场基础,本文通过高密度电法和伪随机流场法相结合对坝体的渗漏路径进行探测。通过对两种测试方法的异常成果进行分析,最终推断坝体及两岸边坡存在三条渗漏通道;并基于软件对坝体及渗漏通道进行三维建模,直观地展示出探测成果及推断的渗漏通道的分布情况;并在高密度电法L1测线对推断的渗漏影响区域进行开挖验证。探测结果表明:高密度电法和伪随机流场法相结合的综合物探法,在对库区渗漏入水口及坝体内渗漏通道的探测中具有可行性,可为大坝后期的维修加固提供有效的技术支持,对大坝渗漏探测工作具有指导性意义。In a small reservoir in Qinghai,during the process of increasing water storage level,the seepage from the water measuring weir behind the dam increased significantly,and water seeped out at the foot of the northeastern slope of the downstream office building.It formed a large waterlogged area on the northern side of the building,which became more and more serious with the rise of the water storage level.Based on the electrical difference and the seepage field,this paper detects the seepage path of the dam body through the combination of high-density electrical method and pseudo-random flow field method.By analyzing the anomalous results of the two testing methods,it is finally inferred that there are three seepage channels in the dam body and the slopes on both sides of the dam.The dam body and the seepage channels are modeled in three dimensions using software,which visualizes the detection results and the inferred distribution of seepage channels;excavation verification of the inferred seepage-influenced areas is carried out along the L1 line of the high-density electrical method.The results show that the comprehensive physical exploration method combining high-density electrical method and pseudo-random flow field method is feasible in the detection of seepage inlets in the reservoir area and seepage channels within the dam body,which can provide effective technical support for the maintenance and reinforcement of the dam in the later stage,and offer guidance for the detection of seepage in the dam.

关 键 词：渗漏通道 高密度电法 伪随机流场法 三维建模 

分 类 号：P631.3[天文地球—地质矿产勘探]