以国内某地铁线路及其临近的埋地长输管道为测试研究对象，在排流柜不同运行工况下对地铁结构与管道相关电参数开展了现场同步测试，分析了排流柜运行工况对临近钢质构筑物（道床收集网、隧道壁结构钢筋和埋地长输管道）杂散电流干扰的影响规律。结果表明：排流柜的投用，特别是接地网支路投用时，流经排流柜的电流极值高达839.48 A；排流柜对供电区间两端的轨地电位的抑制效果与流经排流柜的电流呈现反比例关系且负向抑制效果大于正向；排流柜对临近钢质埋置构筑物的干扰影响主要体现为极化电位正向偏移量增大，且增大的幅度与流经排流柜的电流大小成正比；排流柜和OVPD特别是结构物临近的OVPD同时投用，极化电位正向偏移和负向偏移同时显著增大；排流柜杂散电流干扰对隧道壁结构钢筋的影响范围小于2 km，对3 km内管道影响较大，6 km外管道影响较小。

Taking a domestic subway line and its adjacent buried long-haul pipeline as the test objects, the electrical parameters related to the subway structure and pipeline were tested simultaneously under different operating conditions of drainage cabinet, and the influence rule of operating conditions of drainage cabinet on the stray current interference to adjacent steel structures (ballast-bed collection network, tunnel wall structural reinforcement and buried pipeline) was analyzed. The results showed that the extreme value of the current through the drain cabinet was as high as 839.48 A,when the drainage cabinet was in use, especially the grounding grid branch. The suppression effect of drainage cabinets on the rail-to-ground potentials at both ends of power supply interval was inversely proportional to the current flowing through the drainage cabinet, and the negative suppression effect was greater than the positive one. The interference effect of the drainage cabinet on adjacent buried steel structures was mainly reflected in the increase of positive polarization potential deviation, and the increase amplitude was proportional to the current through the drainage cabinet. When the drainage cabinet and OVPD, especially OVPD adjacent to the structure worked together, the positive polarization potential deviation and the negative polarization potential deviation were obviously increased at the same time. The influence range of stray current interference was less than 2 km to tunnel structure reinforcement, and it was greater within 3 km and less outside 6 km to the pipeline.