Abstract: The line layout design of starting and terminal stations for urban rail transit has a direct bearing on the smooth line connection of the line extension project, thus becoming an important factor in controlling project investment. This paper investigates the line layout of the starting and terminal stations in such cities as Hefei, Hangzhou and Ningbo, and analyzes the design ideas, advantages and disadvantages of various line layouts. In view of the practical engineering cases accumulated from the east extension project of Hefei Metro Line 2, it focuses the analysis on such perspectives as operational flexibility, project investment, future extension demands and practicability. In the end, this paper proposes a cost-reasonable optimization scheme supporting flexible operation and facilitating line extension for trains turning back through turnouts at the back of the station to accommodate the reserved extension schemes of starting and terminal stations for urban rail transit.

Key words: line layout design of starting and terminal stations, reserved extension scheme of turn-back line, operational flexibility, line layout

摘要： 城市轨道交通起终点站的配线设计直接关乎延伸工程能否顺利衔接，是控制工程投资的重要制约因素。通过对合肥、杭州、宁波等城市的起终点站配线形式调研，分析各种配线形式的设计思路和优缺点，并结合合肥轨道交通2号线东延线的实际工程案例，重点从运营灵活性、工程投资、未来延伸需求、可实施性等角度分析，针对城市轨道交通起终点站预留延伸方案的站后折返线形式，提出一种运营灵活、利于延伸、造价合理的优化方案。

关键词: 起终点站配线设计, 预留延伸折返线方案, 运营灵活性, 配线形式