Abstract: Turn-back interval is the main factor that affects the capacity of the urban rail transportation. This paper analyzes the key points restricting the turn-back interval through turn-back operation item and operation time, and puts forward the optimization measure from the aspects such as signal system, vehicle performance parameters, equipment selection, stop time, etc. Focally from the point of optimizing the signaling system, the paper proposes a method to improve the turn-back capability by means of interlocking approach control principle, train speed model, ATO turn-back mode and train control algorithm.

Key words: urban rail transit, turn-back capacity, signal system, turn-back interval, ATP

摘要： 折返间隔是影响城市轨道交通运输能力的重要因素，通过折返作业项目和作业时间分析出制约折返间隔的关键点，从信号系统、车辆性能参数、设备选型、站停时间等方面提出优化措施，重点从优化信号系统的角度出发，提出通过联锁进路控制原理、列车速度模型、ATO的折返模式和控车算法来提高折返能力的方法。

关键词: 城市轨道交通, 折返能力, 信号系统, 折返间隔, ATP