【摘要】 近年来,随着城市地铁的迅速发展,地铁附近的埋地管道常遭受动态直流干扰,造成管道通电电位的持续波动,严重影响了管道的安全运行和日常管理。对遭受地铁杂散电流干扰的某管道开展现场测试,分析了地铁杂散电流对埋地管道的干扰规律。结果表明:地铁运行对管道通电电位的波动有较大影响;地铁杂散电流干扰的强度随着管道至地铁线路距离的减小而增大,距离地铁站较近的管段具有更高的腐蚀风险;受地铁杂散电流干扰的管道不同位置互为流入、流出位置,同一位置杂散电流的流入、流出特性随时间变化。更多还原

【Abstract】 In recent years,with the rapid development of urban subways,buried pipelines near subways often suffer from dynamic DC interference,causing continuous fluctuations in the on potential of pipelines,which seriously affects the safe operation and daily management of pipelines.Field tests were carried out on a pipeline that was disturbed by the stray current of subway,and the interference law of the stray current of the subway on the buried pipeline was analyzed.The results showed that the subway operation had a great influence on the fluctuation of the on potential of the pipeline;the intensity of the disturbance of the subway stray current increased with the decrease of the distance from the pipeline to the subway line,and the pipeline section closer to the subway station had a higher corrosion risk.The different locations of the pipeline interfered by the stray current of the subway were inflow and outflow positions,and the inflow and outflow characteristics of the stray current at the same position would change with time.更多还原