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随着利用天然气的城市逐年增加 ,大部份城市内要铺设天然气管网 ,对各城市原有埋地管线必须探查 ,文中简介了采用电磁及电磁激发极地法的检测原理和检测实例。并指出该法能有效地探查原有管道的走向及埋深。
With the increasing use of natural gas in cities, natural gas pipelines are to be installed in most cities, and the original buried pipelines in all cities must be explored. The detection principle and test examples using the electromagnetic excitation and electromagnetic excitation polar methods are briefly introduced. It is pointed out that this method can effectively probe the trend and depth of the original pipeline.