1000km/h真空管磁浮纵断面参数取值研究

Research of Vertical Section Parameters of 1000 km/h Vacuum Tube Maglev

研究目的:真空管超高速磁浮是实现超高速轨道交通发展的重要方式,本文基于1000 km/h速度需求,参考高速磁浮、高速铁路系统研究成果,展开选线设计中纵断面参数分析并给出纵断面参数建议值。研究结论:(1)考虑安全因素和运行控制系统的特点,真空管超高速磁浮线路纵坡不宜大于50‰;(2)综合考虑速度、垂向加速度、纵坡、横坡、平曲线半径的影响,最小竖曲线半径一般不宜小于78000 m,困难条件下不宜小于65000 m;(3)考虑超高速运营需求,线路竖曲线间应设置缓和曲线,缓和曲线线形建议采用三次抛物线,其最小长度一般条件下不宜小于560 m,困难条件下不宜小于335 m;(4)本研究成果可以应用于超高速磁浮项目工程线路设计。

Research purposes:Vacuum tube ultra high-speed maglev is an important way to achieve the development of ultra high-speed rail transit.This article based on the speed requirements of 1000 km/h and research results of high-speed maglev and high-speed railway systems,analyzed the longitudinal parameters in route selection design and provided recommended values for the longitudinal parameters.Research conclusions:(1)Considering the safety factors and the characteristics of the operation control system,the longitudinal slope of the vacuum tube ultra-high-speed maglev line should not be greater than 50‰.(2)Considering the influence of speed,vertical acceleration,longitudinal slope,transverse slope and radius of horizontal curve,the minimum vertical curve radius should not be less than 78000 m in general,and should not be less than 65000 m under difficult conditions.(3)Considering the needs of ultra-high-speed operation,the entire line of relief should be set up between the vertical curves of the line.It is recommended to use a cubic parabola for the shape of the relief curve.The minimum length should not be less than 560 m under normal conditions,and should not be less than 335 m under difficult conditions.(4)The research results can be applied to the engineering alignment design of ultra-high-speed maglev projects.