Local transformation process for steel spring floating slab ballast bed

Abstract

The invention provides a local transformation process for a steel spring floating slab ballast bed, which comprises the following steps of: firstly, a current floating slab system and parts thereof are replaced and overhauled, the elevation of a contact network is simultaneously adjusted and then a jointless track is removed; then the elevation measurement is carried out on a vibration isolator and a track of each floating slab, and the height which needs to be adjusted and lifted are calculated; then the vibration isolators and the tracks are lifted through the matching combination of the height adjusting base plates; the lifted tracks are reinforced, and the state of the tracks is adjusted; then sleeper concrete at the ballast bed transformation position is removed, and prefabricated type sleepers and fasteners are replaced and installed; and finally, concrete is poured again to reinforce the ballast bed. Local transformation is carried out on the basis of an existing steel spring floating slab track bed through the technology, the track bed rail surface elevation adjustment is achieved, the prefabricated type sleepers are used for replacing an original sleeper-free structure, the current line situation defects are eliminated, the track equipment state is improved, the overall technology is simple, the track bed elevation transformation construction efficiency is improved. The subsequent stable operation of the ballast bed is ensured.

Description

technical field [0001] The invention relates to the technical field of rail transit construction, in particular to a partial transformation process of a steel spring floating slab track bed. Background technique [0002] The direct-buried fastener steel spring floating slab vibration-reducing ballast project is used to solve the environmental damage caused by vibration and noise in rail transit and the impact on residents' lives. [0003] In specific use, after a long period of operation, the directly buried fastener steel spring floating slab damping track bed will suffer serious damage, such as: general failure of spring bars, failure of anchor bolts and insufficient pressure resistance, unevenness of the lower part of the iron backing plate Unevenness, backing plate breakage, ballast bed breakage, floating slab shear hinge breakage, etc., make it difficult to maintain the normal operation of the track, and the track inspection exceeds the limit, which poses a great hidden...

AI Technical Summary

Problems solved by technology

The prefabricated sleeper can be connected with the steel bar of the original ballast bed, but the position of the sleeper conflicts with the steel bar of the original ballast bed and uneven settlement has been caused by the long-term operation of the tunnel. The elevation of the floating slab is lifted and transformed to eliminate the defects of the track equipment, improve the state of the track, and eliminate hidden dangers in operation

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