关键词: 单向编组站, 双向编组站, 布置图, 车流结构

Abstract: Marshalling station is a fundamental place for railway technical operation，and plays a key role in wagon flow organization．Since the cost of construction or reconstruction of Marshalling station is very huge，there should have careful consideration in station type selection．Marshalling station，whatever it is unidirectional or bidirectional，has its own advantages and disadvantages in real operation，and at the same time，there have many other factors which influence station layout．Therefore，it’s unpractical to determine station type only by qualitative analysis，instead，quantitative analysis must be adopted so as to establish a general standard．Basing on above analysis，This paper first puts forward technical items in type selection，and then makes quantitative research into influence of reversing train in unidirectional Marshalling station and angular traffic flow in bidirectional Marshalling station respectively，from which some relative technique factors are acquired in the aspect of wagon flow structure．Afterwards，this paper presents typical station type selecting model by taking unidirectional three-stage/three-yard Marshalling station and bidirectional three-stage/six-yard Marshalling station as representation．At last，northern Xuzhou is applied to a numeral example to validate the effect of this method，which proves that station type selecting by means of comparing the total waste of wagon flow in the Marshalling station from the view of wagon flow structure is not only effective but scientific，meanwhile，this provides a scientific and effective decision-making measure for determining the scope and layout of Marshalling station．

Key words: unidirectional Marshalling station, bidirectional Marshalling station, layout, wagon flow structure