为了实现站场内埋地管道的非开挖定位，借鉴长输管道定位技术，采用PCM＋探索实现站内管道定位的方法。站场内管道错综复杂，用电设备干扰大，按照正常信号加载方式，电流信号在埋地管道和用电设备之间无序流动，无法实现目标管道准确定位。采用PCM＋“短接法”，用金属导线将发射机与待检埋地管道直接相连，不经过地网，而形成“发射机－导线－管道－导线－发射机”的封闭回路，接收机可准确探测到埋地管道的位置，现场试验效果良好，经开挖验证后发现误差小于100 mm。%In order to realize non-excavation orientation of buried pipeline in station ,taking example by long-distance pipe-line orientation technology ,PCM+exploration was used for pipeline orientation in station .Pipelines in station is intricate and e-lectric equipment has large construction disturbance .According to the normal signal loading ways , current signal between the buried pipeline and electric equipment straggles making it unable to realize target pipe accurate orientation .When adopting the PCM+“short circuit method”, the transmitter and the pipe were connected without passing network by metallic wire and loop like“transmitter-wire-pipe-wire-transmitter” was formed, the receiver detected exactly the location of the pipe .Field test result is good , the error is less than 100 mm after excavation verification .
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