A kind of prefabricated ballast-asphalt track and its preparation method

Abstract

The invention discloses a prefabricated track-asphalt rail. The prefabricated track-asphalt rail comprises a track and a hotly-mixed asphalt mixture, wherein the track and the hotly-mixed asphalt mixture are filled layer by layer and are prefabricated by a pressure method; each of the track and the hotly-mixed asphalt mixture is filled and pressed twice. The prefabricated track-asphalt rail is prepared through the following specific steps: (a) after adding the track into a sleeper mold layer by layer, spraying the hotly-mixed asphalt mixture on the upper surface; (b) pressing by adopting a hot press and repeating twice, wherein the laying thickness of the track of each time is 18cm to 20cm and a lug boss structure is formed; (c) forming a groove in a track-asphalt structure in a pressing process of the lug boss structure and putting a sleeper into the groove; pouring hotly-mixed asphalt filling for fixing the sleeper and leveling the sleeper with a prefabricated structure. The prefabricated track-asphalt rail disclosed by the invention has the advantages of good compactness, high compression strength, small deformation, good elasticity, small material dosage and good uniformity and is suitable for urban rail transit; the structure is convenient to manufacture, has the advantages of stable technology, energy resource saving, greenness and environment friendliness, is conveniently manufactured into diversified structures and is convenient for field installation and repairing.

Description

technical field [0001] The invention relates to a ballasted ballast bed structure, which belongs to the field of rail transportation, in particular to a prefabricated ballast-asphalt track and a preparation method thereof. Background technique [0002] From the perspective of track structure, the track is divided into two categories: ballasted track and ballastless track, both of which can meet the needs of train operation. However, compared with ballasted track, ballastless track is more difficult to repair due to its own material, structure and the particularity of railway engineering operation. On the other hand, the ballasted track structure is more flexible, easy to maintain and repair, has a wide range of applications, low construction cost, fast speed, etc., and has strong vitality. However, ballasted tracks are prone to deterioration and require repair. For example, Russia’s Mokka high-speed railway has a wide gauge, a heavy axle, and changes in rail temperature re...

AI Technical Summary

Problems solved by technology

[0004] 1. It is difficult to tamp and repair the geogrid after long-term use;

[0005] 2. The effect of sleeper pads and ballast pads on delaying the deterioration of the ballast bed is limited;

[0006] 3. The polyurethane ballast glue spraying scheme increases the cost, and the spraying area cannot be tamped for maintenance;

[0007] 4. Lengthening the sleeper leads to an increase in ballast and roadbed engineering costs;

[0008] 5. Encrypted sleeper structure leads to a reduction in sleeper spacing, which is not conducive to the construction of large-scale tamping machinery, and it is easy to collide and damage sleepers and maintenance machinery tamping picks

[0011] 1. The paver works horizontally and cannot be compacted, resulting in large deformation, poor elasticity, and uneven stiffness of the asphalt road bed, which has become an important defect and a focus of concern in the industry;

[0012] 2. Paver operation is greatly affected by weather and work space;

[0013] 3. The paving operation is an integral structure, which is difficult to repair and replace specific parts

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