城市轨道交通对临近天然气管道的杂散电流干扰评价及防治

Evaluation and Prevention of Stray Current Interference Caused by Urban Rail Transit on Adjacent Natural Gas Pipelines

地铁是杂散电流干扰常见的干扰源之一,会对周边的埋地管道造成严重的腐蚀。本文研究了地铁对邻近管道的杂散电流干扰的评价方法与防治措施,以常州地铁2号线附近埋地管道为例,采用智能采集仪进行杂散电流干扰情况的检测与评估,评价管道受干扰程度;分析数据得出管道受到不同程度的杂散电流干扰,存在正于保护准则情况。提出了杂散电流防治措施,为实际杂散电流干扰评价提供解决思路,具有指导意义。

Metro systems are commonly known sources of stray current interference,which can cause severe corrosion to neighboring buried pipelines.This article studies the evaluation methods and prevention measures for stray current interference from metros on adjacent pipelines.Taking the buried pipelines near Changzhou Metro Line 2 as an example,intelligent acquisition devices were used to detect and evaluate the stray current interference to assess the degree of interference on the pipelines.The analysis of the data revealed that the pipelines were subjected to varying degrees of stray current interference,exceeding the protective criteria in some cases.Prevention measures for stray current were proposed to provide solutions and guidance for practical stray current interference evaluation.