城市轨道交通CBTC系统中接近区段设置的计算

城市轨道交通普遍采用基于通信的列车运行控制系统，因其在列车定位和追踪方式上的特点，使得联锁功能的实现有所改进。传统接近区段的设置已经不能满足城市轨道交通的要求了，而城轨的相关规范对接近区段没有给出具体的要求。本文针对CBTC模式和后备模式下的特点，分析影响接近区段设置的因素，为接近区段的长度和延时解锁时间的计算给出了具体计算方式，并针对实际应用情况进行了讨论和分析。

Calculation of approach section settings in Urban Transit CBTC System

Communication based train control system (CBTC) are widely used in Urban Transit. Because of its advantages on train locating and train tracking, the implementation of the interlocking function has been improved. Traditional setting of approach section was unable to meet the requirements of Urban Transit, however, the relevant specifications for approach section of Urban Transit are not given. In this paper, according to the characteristics of the CBTC mode and backup mode, the influence factors for the settings of approach sections were analyzed, the lengths and release delay time of approach section were calculated. In addition, actual situations were discussed and analyzed.