CTCS-2信号系统下城际铁路折返能力研究

Research on the Return Capacity of Intercity Railway under CTCS-2 Signal System

研究目的:近年来,粤港澳大湾区出现兼具城际和市域(郊)通勤功能的新型城际铁路,具有自主运营、地下敷设、公交化运营等特征,对系统能力要求较高。既有城际铁路规范对立折列车的折返能力及到发线数量的规定已经不适用于地下敷设为主的大湾区城际铁路,为控制车站规模且最大程度发挥折返能力,亟需研究集约化配线下的高效率折返方式。本文对折返作业流程、各项时间参数标定、作业间相互制约关系进行梳理,通过图解法得出多股道交替折返能力的计算原理,可用于指导运营方案及车站规模控制。研究结论:(1)站前4股道交替折返时,当3道/Ⅰ道和Ⅱ道/4道实际停留时间不大于13.72 min/13.17 min时,对应的接、发车间隔均为4.23 min,折返能力为14对/h,与换端时间无关,仅与占用咽喉区时间有关;(2)站前4股道交替折返时,当3道/Ⅰ道和Ⅱ道/4道实际停留时间大于13.72 min/13.17 min时,在此基础上每增加2 min换端时间,相应的发车间隔就增加0.5 min,折返能力约下降1对/h;(3)站后双停车线交替折返时,换端时间每增加2 min,接、发车间隔增加1 min,折返能力约下降1对/h;(4)本研究成果可应用于行车组织设计与车站配线规模控制。

Research purposes: In recent years, a new type of intercity railway with both inter-city and urban(suburban) commuting functions has appeared in Guangdong-Hong Kong-Macao Greater Bay Area(GBA), which has the characteristics of independent operation, underground laying, public transportation operation and so on. The existing regulations on the turn-back capacity of trains and the number of arrival and departure tracks in the existing intercity railway specifications are no longer applicable to the intercity railway in GBA. In order to control the scale of the station tracks and maximize the ability of arrival and departure tracks, there is an urgent need to research the efficient turn-back mode under intensive distribution lines. According to the analysis of the turn-back operation process, the calibration of various time parameters and the mutual restriction relationship among operations, we conclude the calculation principle of multi-track alternating turn-back capacity by graphic method, which can be used to guide the operation plan and station tracks scale control. Research conclusions:(1) When the alternating return of the four tracks in front of the station, when the actual residence time of track 3/Ⅰ and track Ⅱ/4 is not greater than 13.72 min/13.17 min, the corresponding interval between arrival and departure is 4.23 min, and the return capacity is 14 pairs/h, which has nothing to do with the time of turn-back time, but only related to the time of occupying the throat area.(2) When the actual residence time of track 3/Ⅰ and Ⅱ/4 is longer than 13.72 min/13.17 min, the corresponding departure interval increases 0.5 min and the return capacity decreases by 1 pair/h with each increase of 2 min of turn-back time.(3) When the alternating return of two tracks behind the station, when the turn-back time increases by 2 min, the arrival and departure interval increases by 1 min, and the return capacity decreases by about 1 pair/h.(4) The research result can be used to guide the design of traffic organization and the scale control of station distribution.