城市轨道交通对埋地管线影响范围的分析

Analysis on Influence Scope of Urban Rail Transit on Buried Pipelines

杂散电流会对城市轨道交通附近的地下金属体造成电化学腐蚀,需要采取及时有效的防护措施,确定杂散电流对埋地管线的影响范围是防护工作的基础。本文以轨道一点绝缘失效、入地电流等效半球面辐射建立模型,进行分析,运用电场理论,模拟实际数据,计算由杂散电流引起的电位,按照相关行业标准确定了防护范围。

The model based on one-point insulation failure of track and equivalent hemisphere radiation of earth-fault current is built and analyzed.By using electric field theory,the practical data is simulated and the potential caused by stray current is calculated.According to the relevant industry standards,the protection scope is determined.