Research on the performance of heavy-haul rail breakage detection using track circuit

Rail breakage is one of the major safety risks in railway transportation. Because of the large axle weight, high density and large capacity of the heavy-haul railway, the damage to rail caused by heavy-haul train wheels will be more serious than that caused by ordinary passenger and cargo trains, resulting in a higher frequency of rail breakage. Taking the Daqin Railway Line as the research object, this paper analyses and discusses rail breakages occurring in interstation tracks and in-station tracks by establishing the ZPW-2000A track circuit calculation model considering the land leakage resistance between the rail line tracks; introduces the defining standards and measurement index of the broken rail coefficient to quantitatively analyse the influence of various influencing factors on the rail breakage inspection performance under the most unfavourable working conditions; and compares the model simulation data, the laboratory model data and the field test results to verify its effectiveness, so as to provide a reference and theoretical basis for the subsequent improvement and solution of the heavy-haul railway rail breakage problem.