城市轨道交通快慢车模式下越行站分布及发车间隔研究

Study on Overtaking Station Distribution and Departure Interval in Express and Slow Train Mode of Urban Rail Transit

为提高城市轨道交通快慢车模式下列车开行方案制定和越行设施布置的合理性,通过分析快车停站方案、计划发车间隔及停站时间等因素对越行站分布的影响,提出一种减少越行站数量的分布方法,并在越行站分布完成的基础上,构建以发车间隔整体均衡性最高为目标的数学模型。算例计算结果表明:关于越行站判定条件的设定可靠,当慢车与前行快车的发车间隔为某一时间点或范围时,越行站数量最少且发车间隔整体均衡性最高;计划发车间隔对越行站分布的影响明显,随着计划发车间隔的增大,越行站呈现数量递减、整体位置向终点站方向推后的趋势。

To improve the rationality of making train operation plan and arranging overtaking facilities in the express and slow train mode of urban rail transit, this study proposed a distribution method after analyzing the impact of express train stop plan, planned departure interval, station dwell time and other factors on overtaking station distribution. The proposed method can reduce the number of overtaking stations, and a mathematical model was established with the aim of maximizing the entire equilibrium of departure interval. The results show that the decision condition for overtaking stations is reliable. The number of overtaking stations is minimized and the entire equilibrium of departure interval reaches the optimal level when the departure interval between a slow train and its front express train is taken as a certain time point or within acertain time range. The departure interval has a significant effect on the distribution of overtaking stations. With the increase in the planned departure interval, the number of overtaking stations is gradually reduced and their locations are close to the terminal overall.