【摘要】 直流牵引的城市地铁系统随着铁轨绝缘性能下降会泄漏杂散电流,对附近埋地管道及其牺牲阳极阴极保护系统造成干扰,威胁管道及其阴极保护系统的安全运行。利用数值模拟技术实现该类干扰问题的计算求解,通过已有文献数据进行验证,同时根据实际案例计算分析了地铁杂散电流对埋地管道阴极保护水平及牺牲阳极输出的影响规律,针对获得的影响规律提出了相应的防护方法,并分析了其有效性,研究结果可为埋地管道地铁杂散电流干扰的防护设计提供参考。更多还原

【Abstract】 Stray current will leak due to rail insulation reduction in urban metro system with direct current traction.As a result,adjacent buried pipeline and its sacrificial anode cathodic protection system will be interfered to threat the safety operation of pipeline and cathodic protection system.Numerical simulation technology was used to calculate and solve such interference problems,which was verified using the existing literature data.Meanwhile,actual case calculation was performed to analyze the influence laws of metro stray current on buried pipeline cathodic protection level and sacrificial anode output.Aiming at the obtained influence laws,the corresponding protection methods were proposed,and its effectiveness was also analyzed.The research results can provide references for buried pipeline protection design from metro stray current interference.更多还原