困难条件下高速铁路线路所道岔选型对运营影响分析

Study on Operation Effects on Switch Type of High Speed Railway under Difficult Conditions

我国高速铁路广泛采用跨线运行的旅客列车开行模式,在各大枢纽地区均分布有一定数量的联络线、线路所。联络线的设置虽满足了线路间互联、互通和运营灵活性的需要,但道岔侧向限速不可避免的会影响到侧向列车的速度、时间、追踪间隔,并增加侧向列车对直向线路的占用时间,影响其线路通过能力,当侧向列车数量较多时,以上影响也愈发突出。本文以襄常铁路宜昌地区的金巴岭线路所为例,对采用不同道岔型号时的运营影响进行量化对比分析,并提出困难条件下根据联络线限速合理选用道岔型号的建议,可为类似工程提供借鉴。

The cross-line passenger train operation mode is widely adopted in high-speed railways in China,and there are a certain number of liaison lines and block posts in each hub.Although the setting of the liaison line satisfies the demand for interconnection and operational flexibility,the lateral speed restriction of the switch will inevitably affect the speed,time and tracking interval of the laterally running train,and increase the occupation time of the lateral train to the straight direction,affecting the line passing ability.When the number of lateral trains is large,the above effects become more prominent.This paper takes the Jinbaling block post in Yichang Hub of Xiangyang-Changde Railway as an example,makes a quantitative comparative analysis on the operation influence of different turnout models,and proposes a reasonable selection of the switch type according to the limited speed of the liaison line under difficult conditions,provides reference for similar projects.