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| Research on the Optimization Design about Layout of No.12 Metro Turnout |
| XIONG Wei1, TIAN Chun-xiang1, XU Jing-mang2, WANG Ping2 |
| (1.China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, China; 2.MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China) |
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Abstract Abstract：Research purposes： In order to improve the lateral capacity of the No.12 metro turnout, four optimized design schemes are put forward based on basic parameters method of particle motion. The metro vehicle turnout coupling dynamics model is established to compare and analyze the dynamic interaction characteristics of the vehicle-turnout systems of the original scheme and optimized scheme. Research conclusions： (1) Length of switch rail, switch angle and mediated curve radius in straight line segments of metro turnout are the main factors influencing the lateral capacity. The mediated curve radiuses of original scheme are smaller, which is the main reason that limits its lateral capacity. (2) On one hand, the larger mediated curve radius can improve the lateral capacity of vehicle through the switch, but on the other hand, the length of switch will be increased, not meeting the requirements of the development of urban metro. (3)The scheme one is recommended to improve the lateral capacity of metro turnout, in which mediated curve radius is 400 meters, total length of switch is 37.8 meters, and this scheme can improve the lateral capacity of metro turnout and will not increase the length of switch. (4) The research results can provide the basis for improving the lateral capacity of the metro turnout.
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Received: 15 September 2017
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2017, Vol. 34 
