高速铁路长大下坡道地段信号系统研究与应用

为了解决宝兰高铁隧道密集、连续长大下坡道引起的动车组限速问题,限速地段影响运行追踪间隔时分和轨道区段增多引起区间应答器报文溢出等问题,有必要对长大隧道密集地段连续长大坡道下信号系统的适应性问题进行研究。结合工程实践,通过理论计算和技术参数试验验证等方法,对连续长大下坡道动车组列车不限速场景下列车追踪间隔是否满足要求进行分析计算,对200C、200H、300S、300H和300T车载设备技术参数进行符合性验证,针对部分车载设备制动距离的情况,通过调整闭塞分区长度、优化列控车载设备参数和"加密"区间无源应答器布置等措施,有效解决了动车组限速和区间无源应答器组报文溢出问题,提高了行车效率,降低了维护成本。

Research and Application of Signal System in the Section of Long Downhill Slopes on High-Speed Railway line

Baoji-Lanzhou High-speed Railway line is tunnel-intensive with continuous long and steep downhill slopes, which leads to EMU speed limitation. Furthermore, the speed limit section affects train interval and the increase of track sections causes the overflow of balise message. To solve these problems, it is necessary to study the applicability of the signal system in the tunnel-intensive section with continuous long and steep downhill slopes. Based on engineering practices, whether the tracking interval of EMU trains under the unrestricted-speed conditions in continuous long and steep downhill sections meets the requirements is analyzed by theoretical calculation and technical parameter verification. For 200 C, 200 H, 300 S, 300 H and 300 T on-board equipment, the technical parameters of them are verified respectively for compliance. Considering the braking distance of some on-board equipment, adjusting the length of the block section, optimizing the parameters of the on-board equipment and the arrangement of passive balise in the"encrypted" section, the EMU speed-limit problem and the message overflow of passive balise groups are solved effectively. This scheme improves the operation efficiency and reduces the maintenance cost.