湿轨条件下城市轨道交通信号系统防护方案
孙慧
Protection Scheme of Urban Rail Transit Signaling System under Wet Rail Conditions
SUN Hui
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作者信息:西安市轨道交通集团有限公司， 710016， 西安
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Affiliation:Xi’an Rail Transit Group Co., Ltd., 710016, Xi’an, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20250027
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中图分类号/CLCN:U231.7
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栏目/Col:通信信号
摘要:
［目的］城市轨道交通线路在雨雪等恶劣天气状况下，轨道湿滑会产生安全隐患。若由运营人员人工防护，则易受主观因素影响，导致防护不及时或防护不当等风险而影响运营，故有必要研究湿轨条件下的信号系统安全防护方案。［方法］分析了湿轨模式信号系统防护设计思路。在信号系统中配置湿轨模式，进行信号系统设计时，考虑钢轨的黏着系数等因素，根据天气状况和钢轨表面状态划分不同的档级，以 GEBR（可保证紧急制动率）为关键参数计算列车移动授权，实时进行安全防护。详细阐述了信号系统在湿轨模式报警提示、命令下达、进入及控制、退出等环节的控制流程及实施方案。分析了湿轨模式信号系统控制方案执行须关注的问题。以西安地铁10号线为例，从对运行能力的影响和对行车组织的影响两方面，分析方案执行的效果。［结果及结论］湿轨条件下，由信号系统防护相较于人工防护，借助一系列特殊的控车策略，可全方位保障列车在湿滑轨道上安全运行。通过有序的模式切换及列车数量调整，可最大程度降低轨道湿滑对正常运营秩序的冲击，提高运营的安全性和运营效率，减轻运营方压力。
Abstracts:
［Objective］ Under adverse weather conditions such as rain and snow, urban rail transit lines face safety risks due to rail surface slipperiness. If protection is carried out manually by operation personnel, it is susceptible to subjective factors, potentially resulting in delayed or improper protection, thereby affecting operations. Therefore, it is necessary to study a safety protection scheme for signaling system under wet rail conditions. ［Method］ The design concept of signaling system protection in wet rail mode is analyzed. During the signaling system design, a wet rail mode is configured within the system, and factors like the rail adhesion coefficient are considered. Based on weather conditions and the rail surface state, different levels are defined. Train movement authority is calculated using GEBR (guaranteed emergency braking rate) as the key parameter to ensure real-time safety protection. The control process and implementation plan for signaling system operation under wet rail mode, including alarm prompt, command issuance, entry and control, as well as exit are detailed. Key concerns for executing the signaling system control scheme in wet rail mode are discussed. Using Xi’an Metro Line 10 as an example, the implementation effect of the scheme is analyzed in terms of its impact on operational capacity and train operation organization. ［Result & Conclusion］ Compared to manual protection, signaling system-based protection under wet rail conditions can ensure safe train operation on slippery tracks through a series of specialized train control strategies. By orderly switching modes and adjusting train volumes, the scheme can minimize track slipperiness disruption to normal operations, enhance operational safety and efficiency, thereby reducing the burden on operators.
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