Abstract：Research purposes: The distance between centers construction of metro in order to make use of existing double of lines was just 3.4 m owing to the limitation of clearance in track tunnel. There was no construction example of laying single crossover in such short distance at home and abroad. However it is great significant to lay single crossover with 3.4 m distance between centers of lines for making use of existing tunnel and state asset and reducing construction cost.
Research methods: The research was made on the principle for working out turnout design parameters, the analysis was made for choosing turnout parameters by railway and metro and the rational design parameters of single crossover were ascertained. Then the safety of single crossover was checked by calculation and the rational structure of single crossover was selected.
Research conclusions: If the single crossover with 3.4 m distance between centers of lines is adopted in metro, the values of design parameters for turnout will not smaller than that of simple turnout at both ends. Under this condition, the running safety of train and comfortableness can be guaranteed when the subway train passes through the single crossover at the tolerated through speed of 30 km/h. The program of connection structure of single crossover is rational, which provides reliable support to design of single crossover with 3.4 m distance between centers of lines.
于春华，刘道通. 地铁3.4 m线间距单渡线总体方案研究[J]. 铁道工程学报, 2006, 23(9): 68-73.
YU Chun-hua, LIU Dao-tong. Research on Overall Program of Laying Single Crossover with 3.4m Distance between Centers of Lines for Metro. 铁道工程学报, 2006, 23(9): 68-73.
2006, Vol. 23 
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