高密度电阻率法弯曲测线在管线探测中的应用  

The application of multi-electrode resistivity method of curved survey line in pipeline detection

作　　者：林俊龙 韦乙杰 LIN Junlong;WEI Yijie(Guangzhou Traffic Design and Research Institute Co.,Ltd.,Guangzhou 510000,China;The team 935 of Guangdong Nonferrous Metals Geological Bureau,Huizhou 516001,China)

机构地区：[1]广州市交通设计研究院有限公司,广东广州510000 [2]广东省有色金属地质局九三五队,广东惠州516001

出　　处：《中国高新科技》2024年第19期125-126,152,共3页

摘　　要：在城市及地形复杂区域开展高密度电阻率测量工作,测线布设往往受现场地形、地物条件的制约,难以布设成直线。测线弯曲常导致常规的高密度电阻率法无法开展。笔者根据现场情况提前在地形图上规划好1m×1m的网格,利用RTK沿弯曲测线把电极放样在测线附近的网格节点上,并测量电极坐标。现场利用二维高密度电阻率仪器进行二极装置测量。通过实测电极坐标计算K值,利用实测的电流和电压值重新计算视电阻率。再把电极坐标和视电阻率统一编排成RES3DINV数据格式,利用RES3DINV进行三维反演,通过剖切分析,推测出管线位置。经过一供水管线探测实例验证方法有效可行。When carrying out multi-electrode resistivity method in cities and areas with complex terrain,the layout of survey lines is often restricted by the on-site terrain and surface conditions,so it is difficult to be arranged in a straight line.The bending of survey line often leads to the failure of conventionalmulti-electrode resistivity method.According to the site conditions,the author arranged on the topographic map in 1m×1m grid,use RTK to arrange the electrodes on the grid nodes,and measure the electrode coordinates.The conventional two-dimensional multi-electrode resistivity method instrument is used to measure on site.Recalculate the K value through the measured electrode coordinates,extract the measured current and voltage values,and recalculate the apparent resistivity.Then the electrode coordinates and apparent resistivity are uniformly arranged into the data format of res3dinv,and res3dinv is used for inversed and analysisd to the pipeline position.An example of water supply pipeline detection shows that the method is effective and feasible.

关 键 词：弯曲测线 高密度电阻率 RES3DINV 

分 类 号：P631[天文地球—地质矿产勘探]