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“回线法”也就是电磁法勘探中的“不接地回线法”,本文从理论到实践介绍回线装置在探测地下金属管线中的应用 重点介绍该方法在为勘察施工提供指定区域(钻孔)地下有无地下金属管线、探测地下电性连接不良的金属管线或探测长度规模较小的地下金属管线及探测口径较大或口径较小管线所具有的显著效果。
“Recovering method” is the “Ungrounded Recovering Method” in electromagnetic prospecting. This paper introduces the application of the return device to the detection of underground metal pipelines from theory to practice. This article mainly introduces the method of providing the specified area for survey and construction Hole) underground underground metal pipelines to detect the underground electrical connection of poor metal pipelines or detection of underground metal pipelines of smaller sizes and detection of larger caliber or smaller caliber pipelines have a significant effect.