城市轨道交通双列位停车线设计

目前各个城市的轨道交通线路广泛采用单列位停车线，在列车故障救援时，由于长度限制，只能容纳一辆列车，会产生二次延误。如果将其扩充为双列位停车线，虽然对工程条件和成本提出了更高的要求，但是在列车故障救援方面会有更好的效用。在单列位停车线的基础上，考虑了停车线形式与设置原则，设计了8种不同形式的双列位停车线,并对其适用性进行分析，最后结合OpenTrack软件对双列位停车线在列车故障救援领域中的应用进行仿真。结果表明：8种双列位停车线类型都有其各自的适用场合，纵列式相对普适性更强；双列位停车线宜设置在线路中间，远离停车场和车辆段，可减少延误时间；仅考虑列车故障救援，纵列尽头式双列位停车线为最优选择。

Design of subway parking lines with two train spaces

Subway parking lines with one train space are widely used in urban rail transit systems. However, in the process of train failure rescue , this method can accommodate only one train owing to their length limitations and will cause extra delay. Conversely, subway parking lines with two train spaces work better in train failure rescue, although higher requirements are imposed on engineering conditions and costs. This study designs eight different types of parking lines with two train spaces based on forms and setting principles of traditional parking lines with one train space, and performs a comparison analysis. Moreover, a railway simulation tool OpenTrack is used to simulate the suitability of parking lines with two train spaces during train failure rescue. Results show that each of the eight types of parking lines has its own applicative situation, and tandem parking lines exhibit better applicability among them. Furthermore, the parking lines with two train spaces can considerably reduce rescue delay time when they are set in the middle of the line away from the car depot. In the situation wherein only train failure rescue is considered, the tandem end-type parking lines are the best choice.