城市轨道交通缩短渡线的类型及应用

Types and Applications of Shortened Crossover in Urban Express Railway

随着城市轨道交通市域快线快慢车运营模式的发展,车站配线型式越来越复杂,缩短渡线在轨道交通配线设计中的应用,不再局限于单渡线两组道岔之间,还出现一种新型的两端分别连接道岔和圆曲线的渡线。为了系统研究缩短渡线设计,全面总结缩短渡线的型式和现有计算公式,在此基础上,研究平行线路可做缩短渡线的最小线间距,以及平行线路缩短渡线长度与线间距之间的关系,并补充两端分别连接道岔和圆曲线的缩短渡线的计算公式。研究表明,该缩短型式可以有效缩短双岛车站总长度,减少车站规模和节约工程投资,相较于平行线路间缩短渡线,该缩短型式相对减少1组道岔,可提高行车舒适度,在越行线和站前折返线等载客过岔的地段有较高的应用价值。

With the rapid development of the operation mode of operating express/slow trains on urban express railway,the sidings of stations is becoming more and more complex.The application of shortened crossing in the distribution design of rail transit wiring is no longer limited to the setting between two turnouts on single crossover,and a new type of shortened crossover of connecting turnouts and circular curves at both ends has emerged.In order to systematically study the design of shortened crossovers,this paper comprehensively summarized the types of shortened crossovers and the calculation formulas of existing research.Based on this,the minimum spacing between parallel tracks that could be used for shortened crossovers,as well as the relationship between the length of parallel track shortened crossovers and the spacing between tracks,were studied.The calculation formulas for shortened crossovers with switches and circular curves connected at both ends were also supplemented.This shortened form could effectively shorten the total length of double island stations,reduce station size,and save engineering investment.Compared with the shortened crossovers between parallel tracks,this shortened form relatively reduced a set of switches,which could improve driving comfort.Therefore,the shortened crossover has high application value in areas where passengers pass through switches such as overtaking lines and station front turn back lines,and can provide reference for optimizing the design of rail transit wiring.