朔黄铁路三显示改四显示通过能力变化分析

Analysis on Change in Carrying Capacity of Shuozhou-Huanghua Railway Caused by Altering Three Aspects to Four Aspects

双线自动闭塞重载铁路的信号机从三显示分布改造至四显示分布时,列车追踪间隔距离的变化会引起列车追踪间隔时间的变化,从而导致线路通过能力发生变化。结合我国双线重载铁路宜采用四显示移频自动闭塞的发展趋势,依据既有线路允许速度及列车编组等现状运营情况,对朔黄铁路既有信号机的三显示分布进行四显示分布改造,并根据改造后四显示信号机的分布结果,研究改造前后列车追踪间隔距离及追踪间隔时间的变化,以此分析改造前后线路通过能力的变化情况,为线路运输能力与运输需求的发展适应提供依据。

When the signals of double-track heavy haul railways of automatic block are altered from three aspects to four aspects,the changes in train headway lead to the changes in the headway time,affecting the carrying capacity of the line.As the double-track heavy haul railways in China move towards four-aspect frequency-shifting automatic block,the paper takes into account the status quo of the operation conditions of existing lines–speed limit and train formation alike-and works to install four-aspect signals.In accordance with the arrangement of such signals,it compares the train headway and headway time required before and after the change of aspects,which helps conclude the impact to the carrying capacity of the line.The results offer references to the development and adaptation of transport capability and transport demand.