摘要
首先,将磁电阻率法应用于堤坝渗漏隐患探测中,通过构建堤坝渗漏探测模型,分别在堤坝上游和下游布设电极,借助渗漏路径形成电流回路;其次,推导渗漏路径的磁异常分布表达式;计算不同渗漏位置、不同渗漏半径的磁异常三分量空间分布;最后,分析渗漏路径所产生的磁异常强度x方向水平分量B的空间分布特征,研究堤坝渗漏深度和渗漏半径对探测效果的影响。研究结果表明:B高于磁异常y方向的水平分量B和z方向的垂直分量B。B与渗漏深度成反比,与渗漏半径成正比,使用磁电阻率法探测堤坝渗漏方向时,应用B分量能够获取最优探测效果。
Firstly, the magnetometric resistivity(MMR) method was applied to the detection of seepage path in the dam. The electrodes were arranged in the upstream and downstream of the dam seepage model respectively, and the current loop was formed by means of the seepage path. Secondly, the expression of magnetic anomaly distribution of seepage path was derived. The spatial distribution of three components of magnetic anomaly in different positions and different radii of seepage path were calculated. Finally, the spatial distribution characteristics of the horizontal component Bof the magnetic anomaly caused by the seepage path were analyzed,and the influence of the depth and radius of seepage path on the detection effect was studied. The results show that the horizontal component in x direction Bof magnetic anomaly is larger than that in y direction Band vertical component B. The intensity of the horizontal component Bof the magnetic anomaly is inversely proportional to the depth of the seepage path and directly proportional to the radius of the seepage path. For the detection of deep seepage position and early seepage, the application of horizontal component can obtain the optimal detection effect.
作者
万玲
叶睿
汪满满
林小雪
林婷婷
WAN Ling;YE Rui;WANG Manman;LIN Xiaoxue;LIN Tingting(College of Instrumentation&Electrical Engineering,Jilin University,Changchun 130026,China;Key Laboratory of Geophysical Exploration Equipment,Ministry of Education,Changchun 130026,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第8期3031-3039,共9页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(41974208)
吉林省科技厅重点科技研发项目(20180201017GX)
吉林省科技发展计划项目(20180520183JH)。
关键词
磁电阻率法
堤坝渗漏
数值模拟
磁异常分布
magnetometric resistivity method
dam seepage
numerical simulation
magnetic anomaly distribution
