A vibration-reducing and temperature-insulating unit slab ballastless track structure

Abstract

The invention relates to a vibration-damping temperature-insulation elemental-plate-type ballast-less track structure. The structure comprises a trisection asphalt grading macadam base layer, a rubbermodified asphalt layer and a track panel layer which are laid from bottom to top in sequence; the trisection asphalt grading macadam base layer comprises a grading macadam layer, an asphalt macadam mixture layer, and asphalt concrete mixture layer; the grading macadam layer is laid on filling and a soil base layer. According to the vibration-damping temperature-insulation elemental-plate-type ballast-less track structure, the structure stability of frozen soil can be effectively guaranteed, and the track panel layer can disperse upper loading and make upper loading evenly transmitted downwards; the rubber modified asphalt layer can lower influence of vibration generated by a high speed running train on a lower structural layer, and the effects of buffer and vibration damping are achieved;the void content of the trisection asphalt grading macadam base layer gradually increases from top to bottom, the void content of an upper-layer mixture and a middle-layer mixture is relatively low,the influence of the temperature on a frozen soil layer is insulated, and meanwhile the waterproof effect can also be achieved; the elemental-plate-type track structure is adopted and has the advantages of specific force transmission mode, excellent smoothness and stability, quick repairing and the like.

Description

technical field [0001] The invention relates to the technical field of high-speed railway and urban rail transit, in particular to a vibration-reducing and temperature-insulating unit slab ballastless track structure. Background technique [0002] The ordinary speed railway runs at a slow speed and does not have high requirements on the smoothness of the subgrade. When frost damage occurs, maintenance can be carried out at intervals between trains to maintain normal operation. However, with the speed-up of railways, especially the large-scale construction and operation of high-speed railways, and the increase of traffic density, the requirements for the deformation and stability of railway subgrades are extremely high, especially once the subgrade frost damage occurs, it will cause great harm. With the continuous construction and operation of high-speed railways in seasonal frozen soil or high latitude and high altitude areas, the stability of frozen soil roadbeds has become...

AI Technical Summary

Problems solved by technology

For example, the high-speed railway from Harbin to Dalian adopts I-type slab ballastless track structure, and measures for roadbed insulation are adopted to solve the problem of frost heave in the roadbed. Fiber concrete was poured above the ground, but the subgrade frost heave still occurred

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