Short-sleeper long-lump integrated ballast bed seamless track construction method

Abstract

The invention relates to a method for constructing short sleeper long rail row integrated seamless track, which welds at least three standard steel rails into long rail bar on the base ground and combines two long rail bars with short sleeper, fasteners, and steel rail into long rail row; uses light rail towing vehicle to move the long rail row into construction site and uses gantry cranes to move the long rail row to the mounting position to be adjusted, welded and temporary fixed; then processes railway bed irrigation and rail temperature fixing. The inventive method can transform traditional processes which should be completed inside the hole or light way construction site to the rail laying base; and it can utilizes assembly-line operation which can improve the rail row mounting quality, reduce the labor force, reduce the environmental pollution, shorten the construction period, confirm the welding quality between rails, avoid arranging the welding interface on the sleeper and confirm the shape of curve. In addition, since it utilizes mechanical integrated suspending and mounting inside the hole, it can accelerate the construction plan. The invention can mount, transport and weld the long rail with at least 125m length in one time.

Description

Technical field [0001] The invention relates to a rail construction method for urban rail transit, in particular to a construction method for a monolithic track bed seamless track using long rail rows. Background technique [0002] At present, the short-track arrangement method is widely used in the construction of urban rail transit, including the "track changing method" and the "track welding method". The main disadvantage of the "rail changing method" is that it takes up a lot of tool rails, which increases the construction cost. It also needs to arrange centralized harvesting operations, which extends the construction period, so its overall cost is relatively high. The main shortcomings of the "on-line rail welding method" are: ①When adjusting the rail in a curved section, it is difficult for the rail near the temporary splint to achieve smoothness, which affects the quality of the line; ②The internal combustion generator set equipped with the rail welding car is discharged i...

AI Technical Summary

Problems solved by technology

This method overcomes the deficiencies of the rail changing method and online rail welding method widely used in urban railway construction; it also solves many difficulties that must be overcome in the application of long rail arrangement method in urban railway construction, such as: ①Small line radius , the minimum radius is only 300m; ②The traction force of the transport locomotive is small, the axle load is light, and the weight of the rail row is required to be light; ③The inner and outer rails have relative displacement when the rail row passes through the curve during the transportation process; ④The increase of the length of the rail row makes the overall The weight is several times higher than the short rail row, so the resistance of upsetting during welding is increased

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