针对城市轨道交通特大跨钢桥轨道结构选型问题,结合国内外特大跨钢桥轨道应用情况,分析了特大跨钢桥对轨道结构的特殊要求,并对有砟轨道和无砟轨道应用于特大跨钢桥上的适用性进行比较。以重庆环线鹅公岩大桥轨道专用桥为例,分析了有砟轨道和减振垫浮置板无砟轨道在钢桥上应用的影响因素。通过比较得出特大跨钢桥适宜采用无砟轨道型式的结论。 Aiming at the selection of orbital structure of large-span steel bridge in urban rail transit, combined with the application of large-span steel bridge at home and abroad, the special requirements of large-span steel bridge on track structure are analyzed. The application of ballastless and ballastless orbit Applicability across steel bridges is compared. Taking the special railway bridge of Chongqing Egong Eragongyan Bridge as an example, the influencing factors on the application of ballastless track of ballast track and vibration-damping pad floating plate are analyzed. By comparison, it is concluded that it is appropriate to adopt the ballastless track type for the large span steel bridge.