关键词: 分路不良, 分路残压, 25?Hz相敏轨道电路, 组合调整, 钢轨除锈

Abstract: As a commonly used standard for railway station track circuits, the safe and reliable operation of 25 Hz phase detecting track circuit is directly related to the safe and efficient operation of the railway network. However, poor shunting is still a typical technical problem in the application process of 25 Hz phase detecting track circuit. Based on a typical case of poor shunting in track circuit that occurred at a certain station,  this paper deeply introduces the coping strategies for the problem of poor shunting of a 25 Hz phase detecting track circuit, and designs a variety of optimization and adjustment schemes and carries out comparative analysis. Finally, taking into account the causes of poor shunting and the characteristics of the 25 Hz phase detecting track circuit, practical application suggestions for the solution are given, which provides a necessary reference for solving the problem of poor shunting of the 25 Hz phase detecting track circuit in the field.

Key words: loss of shunting, residual shunt voltage, 25 Hz phase detecting track circuit, combined adjustment, rail derusting