时速160 km市域(郊)铁路明线地段的最小线间距

Minimum Line Spacing in Open Line Section of Urban(Suburban)Railway with a Speed of 160 km/h

通过数值模拟计算列车会车风压和横向振动加速度,对列车交会时的平稳性进行了评价,对比了市域(郊)铁路和干线高速铁路的会车频率,分析了增减线间距对工程投资的影响。结果表明:市域(郊)铁路明线地段最小线间距按照TB 10624—2020《市域(郊)铁路设计规范》进行设置,两相同车型的列车以176 km/h等速会车时,列车平稳性仅合格,而增大线间距可有效降低会车压力对列车平稳性的影响;市域(郊)铁路会车频率比干线高速铁路高,会车引起的车体横向振动更频繁,故应尽可能提高会车时列车平稳性等级;市域(郊)铁路明线桥梁地段略微增大线间距对工程投资影响极小。因此,建议时速160 km的市域(郊)铁路明线地段,在TB 10624—2020推荐的最小线间距基础上增大0.2 m。

Through numerical simulation,the wind pressure and transverse vibration acceleration of trains crossing each other were calculated,the stability of trains crossing each other was evaluated,the crossing frequency of urban(suburban)railway and trunk high speed railway was compared,and the influence of increasing or decreasing line spacing on project investment was analyzed.The results show that the minimum line spacing in the open line section of urban(suburban)railway is set according to TB 10624—2020 Code for Design of Urban(Suburban)Railway.When two trains of the same model cross each other at a constant speed of 176 km/h,the train stability is only qualified,and increasing the line spacing can effectively reduce the impact of meeting pressure on train stability.The crossing frequency of urban(suburban)railway is higher than that of trunk high speed railway,and the transverse vibration of vehicle body caused by crossing is more frequent.Therefore,the level of train stability during crossing should be improved as much as possible.The line spacing of the bridge section of open line of urban(suburban)railway is slightly increased,which has little impact on the project investment.Therefore,it is suggested that the line spacing of open line section of urban(suburban)railway with a speed of 160 km/h should be increased by 0.2 m based on the minimum line spacing recommended in TB 10624—2020.