Analysis on Design Scheme of CRTSⅢ Slab Track Structure on Roadbed

Abstract:

On the basis of the summary of advantages and disadvantages of the main track types used in newly built high-speed railway in China include CRTSⅠslab, CRTSⅡslab and double-block ballastless track, CRTSⅢ slab ballastless track has been proposed. CRTSⅢ slab ballastless track on roadbed have two design schemes which are unit style and longitudinal continued style. In this paper, longitudinal-transverse-vertical spatial coupled model is established, and the mechanical characteristics of two design schemes under the action of temperature load, vehicle load, concrete shrinkage and foundation settlement deformation are calculated and analyzed. Analysis results show that for the severe cold area, considering the influence of temperature load and maintainability of track, the unit style structure is suggested.