Construction technology of ballast bed of bridge double-block ballastless track

Abstract

The invention relates to the technical field of the building of high speed railway passenger special line, disclosing a construction technology of a ballast bed of a bridge double-block ballastless track. The technology comprises the following steps: 1. ensuring that bridge sedimentation satisfies construction requirements; 2. cleaning the bridge surface; 3. building an anti-collision wall, an expansion gap and a water-proof layer; 4. laying a protective layer, and pre-embedding a shear resistant boss; 5. laying an isolating layer; 6. assembling a track skeleton; 7. laying a surface course reinforcing steel bar layer; 8. accurately adjusting the track skeleton; and 9. pouring ballast bed board concrete. The invention has the advantages that the application of a construction supporting and adjusting device and technical operation control ensure that geometric space position of the double-block ballastless track system is kept to be stable, can be adjusted in a stepless mode in the whole construction process, improves the laying precision of the bridge double-block ballastless track and effectively improves construction quality.

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 in bridge 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 mainte...

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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