The stability and safety of signaling system in mountain railway are often influenced directly by the special geological environment where the resistance of track bed is low and the resistance of soil is high. In this paper, the project of adding the second line to Xiangfan-Chongqing Railway was cited as an example, and the specific impacts of both the low track bed resistance and high soil resistance on the signaling system were researched. Further, the design scheme was proposed, in which the axle counter plus the track circuit automatic-block system should be utilized and the earthing resistance reduction system should be installed. Therefore, the two main technical problems on mountain railway signaling system were solved respectively, including the impact of low track bed resistance on track circuit, and the impact of high soil resistance on equipments earthing. The actual operation in more than a year has proved that this solution is feasible.%山区铁路道床电阻较低、土壤电阻较高的特殊地质环境将直接影响信号系统运行的稳定性及安全性.以襄渝增建第二线工程为例,就较低的道床电阻、较高的土壤电阻对信号系统产生影响的具体环节进行分析研究,提出采用计轴设备加轨道电路自动闭塞制式和设置接地降阻系统的设计方案,分别解决了低道床电阻对轨道电路、高土壤电阻对设备接地影响的两大山区铁路信号技术难题.运营1年多的实践证明,该方案合理可行.
展开▼
