城轨快线工程最高运行速度达到160 km/h,为解决现行国家标准中限界主要技术参数未覆盖该速度等级的问题,通过对国内外限界体系及计算方法的调查研究,选取理论分析结合动力学仿真的研究方法,对《地铁限界标准》(CJJ96-2003)中的计算公式进行调整,使其适用于160 km/h的快线工程.在限界基本参数研究的基础上,结合快线工程特点,制定了车站、隧道的最优建筑限界:(1)与停站工况相比,列车以100 km/h越行过站时,站台与线路中心线的距离可保持1 600 mm不变;(2)圆形隧道断面取决于设备布置空间需求,当采用柔性接触网时最优隧道内径7.5 m(限界圆直径为7.2 m),采用刚性接触网时最优隧道内径7.1 m(限界圆直径为6.8 m).
Key Technologies of 160 km/h Urban Rail Express Gauge
The maximum operating speed of urban rail expresses is 160 km/h.As the main technical parameters of the gauge in the current national standards do not cover this speed,this study uses theoretical analysis and dynamic simulation methods to research the gauge system and calculation methods.The calculation formulas in the Standard of Metro Gauges(CJJ 96-2003)were adjusted to be suitable for the 160-km/h express project.The optimal structure gauges of the station,tunnel,and bridge were formulated in combination with the express project characteristics based on research on the basic gauge parameters.1)Compared with the stopping condition,when the train passed the station at 100 km/h,the distance between the station platform and the central line of the track was 1,600 mm.2)The size of the circular tunnel section was determined by the space requirement for equipment layout in the urban rail express project.When the flexible overhead contact system was used,the optimal tunnel diameter was 7.5 m(the gauge diameter was 7.2 m).When the rigid overhead contact system was used,the optimal tunnel diameter was 7.1 m(the gauge diameter was 6.8 m).
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