Construction and maintenance operation method of cast-in-place roadbed slab type ballastless track

Abstract

The invention relates to a construction and maintenance operation method of a cast-in-place roadbed slab type ballastless track, and belongs to the technical field of maintenance and repair of high-speed railway ballastless track structures. The basic process is that: after determining a roadbed slab in need of renovation and repair, steel bars are embedded in the roadbed slab at the two ends outside a to-be-repaired roadbed slab segment in a first skylight, then the to-be-repaired roadbed slab is completely cut and ripped away by the aid of laterally inward or outwardly shifting steel rails,and finally after the steel rails are locked by temporary sleepers, the line is opened; and enough time is left for re-lay sleepers in a second skylight, and roadbed slab rapid-hardening concrete is cast, to restore the track structure. The method can completely remedy the disease of the cast-in-place roadbed slab type ballastless track without cutting the steel rails. The method is quick in construction, practical and reliable and cost-effective, and can be applied to the requirements of the disease remediation of the cast-in-place roadbed slab type ballastless track under various working conditions while the quality and work efficiency are guaranteed.

Description

technical field [0001] The invention relates to a construction and maintenance operation method for a cast-in-place slab-type ballastless track, and belongs to the technical field of maintenance and maintenance of high-speed railway ballastless track structures. Background technique [0002] At present, the cast-in-place bed slab ballastless track of my country's high-speed railway mainly includes CRTS I and CRTS II double-block ballastless track. Among them, the CRTS I type double-block ballastless track is a ballastless track structure type in which prefabricated double-block sleepers are assembled into a rail row, and the sleepers are poured into a uniform and continuous reinforced concrete track bed by in-situ pouring concrete; CRTS II The type double-block ballastless track adopts the method of pouring concrete on site, and the prefabricated double-block sleepers are assembled into a ballastless track structure type in which the rail row is embedded in a uniform and con...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem that it is difficult to complete the overall replacement of the track bed slab within the skylight time due to the long setting time of the recast concrete when the track bed slab of the cast-in-place track bed slab type ballastless track is replaced and the method currently used Due to the drawbacks of cutting the rails during partial treatment, a method is invented that is suitable for implementation within the skylight time without cutting the rails, and can treat the defects of the cast-in-place track bed slab ballastless track.

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