AC Interference Law of Beijing-Shanghai High-Speed Railway on Buried Pipelines and Mitigation Measures

The long-distance parallel and crossing between of Beijing-Shanghai high-speed railway and an oil pipeline in Shandong province leads to serious AC interference to the oil pipeline. In this paper, the interference characteristics, interference intensity, AC potential distribution, and mitigation measures of the buried pipeline were clarified through field inspection and numerical simulation evaluation. Post-evaluation showed that the pipeline AC interference problem has been solved. Based on this engineering case, the evaluation methods of AC interference intensity of pipelines by high-speed railway and AC transmission lines were significantly different. The numerical simulation calculation has an important role in the reasonable design of dynamic AC interference drainage ground bed quantity and grounding resistance.