Construction process for double-block ballastless track bed on subgrade

Abstract

The invention discloses a construction process for a double-block ballastless track bed on a bridge, which belongs to the field of construction process for high-speed railway passenger dedicated lines. The construction process comprises the following steps: step one, ensuring that the bridge settlement meets the construction requirements; step two, cleaning the bridge floor; step three, constructing a percussion wall, an expansion joint and a waterproof layer; step four, laying a protective layer and an embedded shearing-resistant dummy club; step five, laying an isolating layer; step six, assembling a track panel; step seven, laying a surfacing steel bar layer; step eight, accurately adjusting the track panel; step nine, performing concrete pouring to a track bed slab. The construction process has the advantages that the geometrical space position of the double-block track panel system can stays firmly and can be steplessly controlled during the whole construction process through theapplication and the process operating control to the supporting and adjusting device; and the laying precision of the double-block ballastless track bed on the bridge can be enhanced, and the construction quality is effectively improved.

Description

technical field [0001] The invention relates to the field of construction technology for high-speed railway passenger dedicated lines, in particular to a construction technology for laying double-block ballastless tracks on roadbed sections. Background technique [0002] On railways, "ballast" means small pieces of stone. Traditional railways are all based on small stones, and then sleepers or cement rails are laid. The rails are fixed on the sleepers, and the ballast is paved with small gravel. Ballast and sleepers both play the role of increasing the force-bearing surface, dispersing the pressure of the train, and helping the rail to bear the load, preventing the rail from sinking into the soil due to too much pressure. This traditional ballasted track has the characteristics of easy laying and low overall cost. However, under the long-term load of high-speed trains, it has reached the limit of the carrying capacity, the smoothness of the track has deteriorated, the maint...

AI Technical Summary

Problems solved by technology

This traditional ballasted track has the characteristics of easy laying and low overall cost. However, under the long-term load of high-speed trains, it has reached the limit of the carrying capacity, the smoothness of the track has deteriorated, the maintenance workload has increased, and the available maintenance time has become shorter and shorter. less, which seriously hinders the development of high-speed railway

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