Abstract：Research purposes: The research on the track joining of the departure and arrival track of the vehicle depot is a very important work in the prophase design． In this paper，through comprehensively analyzing and comparing the schemes for the one － station track joining and two － station track joining of the departure and arrival track of the Xizhang Vehicle Depot of Line 1 of the Wuxi metro，the analysis is made from areas of the scale of the station where the track joins，track conditions，the interference degree on the traffic，the turn － back operation，the operation efficiency of the train departing the depot and the construction investment so as to decide the most reasonable scheme．
Research conclusions:The factors of the easy operation，optimization of the plane and vertical sections conditions， reduction of the traffic interference on the main track，improvement of the operation efficiencies of the train turning back and departing and arriving at the depot and reduction of the operation cost should be considered for selection of the track joining mode of the departure and arrival track． In addition，the factors of the depot site，the main track conditions，the station scale，the traffic conditions，the operational conditions and investment should be considered to select the reasonable track joining mode in the design of the urban rail transit． According to the layout of the station ，the train has the function of changing direction if possible． When selecting the track joining mode of the departure and arrival track ofthe depot，the factors of the regional plan and the social and economic benefits also should be considered to decide the most reasonable scheme．
China Railway Siyuan Survey and Design Group Co． Ltd． Overall Design for Rail Transit Line 4 in Wuxi［Z］． Wuhan:China Railway Siyuan Survey and DesignGroup Co． Ltd，2009．
［5］ 张鹏． 大连地铁车辆段出入线接轨方案综析［J］铁道工程学报，2008(2):80 －83．
Zhang Peng． Comprehensively Analyzing the Conjunction Scheme of Station and Out ＆ In Line of Dalian Metro Depot［J］． Journal of Railway Engineering Society，2008(2):80 －83．
Gu Xiaodong． Research in Conjunction Scheme of Station and Out＆In Line of Nantou Rolling Stock Depot in Shenzhen Metor No． 1［J］． Railway Standard Design，2009(7):32 － 34．
［7］ 张沛艳． 前海车辆段站场设计方案研究［J］铁道勘察， 2008(4):71 － 73．
Zhang Peiyan． Scheme on Designing Station and Yard at Qianhai Rolling Stock Depot ［J ］． Railway Investigation and Surveying，2008(4):71 － 73．
［8］ 蔺增良． 地铁辅助线设计研究［J］． 都市快速交通，2007 (4):63 －66．
Lin Zengliang． On the Design of Auxiliary Lines on Subway［J］． Urban Rapid Rail Transit，2007(4):63 － 66．
2012, Vol. 29 
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