城市轨道交通有碴轨道结构合理道床厚度的探讨

有轨道是城市轨道交通地面线最常采用的轨道结构，现行的地铁设计规范对道床厚度的选择仅根据轨道强度要求和国铁的经验确定，本文应用轨道结构强度计算理论及车辆－轨道耦合振动动力学仿真计算模型，分析了不同道床厚度对相关轨道结构部件的影响，得出了合理道床厚度的建议值。

The Analysis of Rational Thickness of Ballast in the Track of Urban Mass Tansit

Ballasted track is the most used track type in ground track of urb an mass transit in existing “Code for the Design of Metro”. To design thicknes s of ballast bed is based on the required strength of track structure and partly the experience in national railway. Using theory of strength of track struc ture and vehicle-track coupling vibration dynamic model, we analyze the effects the different thickness of ballast act on relevant track structure parts and deduce the rational thickness of ballast.