Abstract:Research purposes: Based on summarizing the application of railway track for steel bridges some principles of track type selection were proposed according to structural characteristics of track and high speed railway large span steel truss cable stayed bridge. With the proposed principles of track selection,ballast track synthetic resin sleeper track,slab ballastless track and bi-block track were analyzed and compared and recommendations for track type selection were proposed.
Research conclusions:(1)Characteristics of different track structures construction maintenance,comprehensive economy and environment should be taken into account when selecting track for high speed railway large span steel truss cable stayed bridge. (2) Ballasted track is more mature but its weight is greater maintenance workload is heavier and in consideration of lifetime cycle cost comprehensive performance of ballasted track is poorer. For bi-block track its advantages include simple structure,lighter weight etc.,but it has a greater impact on the track alignment which makes higher demands for construction technology. (3)Slab ballast less track has lighter weight good adaptability for steel truss bridge,and has been applied in overseas railway steel bridge. Synthetic resin sleeper track has simple structure,lighter weight less maintenance and good adaptability for steel truss bridge. So,synthetic resin sleeper track and slab ballast less track are proposed for high speed railway large span steel truss cable stayed bridge. (4)The proposal in this paper can provide the reference to track type selection for high speed railway large span steel truss cable stayed bridge.
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