城市轨道交通工程杂散电流腐蚀防护研究

Study on Stray Current Corrosion Protection in Urban Rail Transit Engineering

城市轨道交通直流牵引供电不可避免地会带来杂散电流泄漏问题,造成地铁自身混凝土结构钢筋、地铁钢轨及附件、周边埋地金属管道、周边建筑物主体结构钢筋等腐蚀穿孔,以及对人身安全造成威胁。从杂散电流的产生、危害、既有治理和监测方案、改进治理措施等入手进行分析和阐述,对城市轨道交通工程杂散电流腐蚀防护具有十分重要的意义和作用。

Urban rail transit DC traction power supply will inevitably bring stray current leakage problems,resulting in corrosion and perforation of concrete structure steel bars of the subway itself,subway steel rails and accessories,surrounding buried metal pipelines,and steel bars of the main structure of surrounding buildings,as well as threats to personal safety.The generation and hazards of stray currents,the existing treatment and monitoring schemes,and the improvement of governance measures are analyzed and elaborated.This paper has great significance and role in the protection of stray current corrosion in urban rail transit engineering.