轨道电路在无碴轨道条件下的传输问题制约了无碴轨道的推广应用。全程绝缘化处理、调谐区绝缘化处理和优化轨道电路设计是目前改善轨道电路传输特性的主要途径。调谐区绝缘化处理可以降低工程造价,但对于改善谐振式轨道电路传输特性作用有限,由此带来的协调与配合等问题还需要进一步研究。 The transmission of orbital circuit under ballastless track restricts the popularization and application of ballastless track. It is the main way to improve the transmission characteristics of the track circuit that the entire insulation process, the tuning zone insulation process and the optimized track circuit design are present. Tuning zone insulation treatment can reduce the project cost, but for improving the transmission characteristics of the resonant track circuit is limited, the resulting coordination and cooperation and other issues still need further study.