Novel track layer for urban track traffic engineering and its construction method

Abstract

It relates to the engineering technology science, in particular to a novel track layer for urban rail traffic engineering and its construction method. The novel track layer comprises lifting and walking trolleys, a connecting truss beam, a track running mechanism and a supporting structure. Horizontal extending and vertical supporting structures of each lifting and walking trolley are operated firstly so as to lift the whole novel track layer to a height at which a track material is hoisted and unloaded. A hoisting car is used to lift up the track material to leave from a flat trunk and a material supporting cushion. The novel track layer continues to walk forward to a designed mounting position of a track section, and then the track material is unloaded. Steel tracks are connected and a temporary track section support is mounted to fix a newly mounted track section.

Description

TECHNICAL FIELD[0001]The present invention relates to engineering technology science, in particular to a novel track layer for urban track traffic engineering and its construction method.BACKGROUND ART[0002]At present, in the track construction of urban track transit engineering in China, track layer equipment mainly includes three types: a fixedly assembled door type structure, a manual and hydraulic fixed-distance variable-span door type structure and an automatically retrieved electric stepless variable-span door type structure. Temporary running tracks need to be layed for the three types of track layers to run. The temporary running tracks are pre-layed on tunnel sidewalls on both sides of a main line or a structure floor, with track distances being generally 2800 mm, 3000 mm, 3100 mm, 3800 mm, etc. The temporary running tracks are fixed on the tunnel sidewalls or the structural floor by special steel structural buttresses. Due to the narrow space of an underground tunnel struc...

AI Technical Summary

Benefits of technology

[0044]1. the novel track layer adopts a combined symmetrical structure type which may be an assembly module capable of being assembled or disassembled, thus bringing convenience for operation, driving, transportation and transfer transportation;

[0045]2. the novel track layer is electrically driven and shares power with other works of track construction to save energy resources, and the entire vehicle is light in weight and more prominent in environmental protection advantage;

[0046]3. the novel track layer walks on the main line track, without the need to pave a temporary track, such that the working efficiency is higher, and therefore the novel track layer is applied more widely in a section free of the main line track due to the adoption of crawler running;

[0047]4. the novel track layer does not use a temporary auxiliary track, such that the construction procedures are decreased, the construction investment and construction cost are reduced, and the potential safety hazards during construction are reduced;

[0048]5. the novel track layer walks on the main line track, and the pavement of the temporary running track is canceled completely so as not to occupy the structure space of a track bed, such that once construction of track bed concrete is realized, the concrete construction quality is improved, and the phenomenon of water seepage at a track bed construction joint is solved; and

[0049]6. the novel track layer walks on the main line track, is not affected by structural sections and is suitable for various working conditions of track laying. Due to adoption of the truss beam for hoisting, the working space is large and the lifting capacity is large. The lifting and walking trolleys which adopt a horizontally extendable structure design can be used for hoisting ultra-wide materials such as a pre-assembled track switch, accompanied with wide applicability and strong versatility.

Problems solved by technology

Due to the narrow space of an underground tunnel structure of urban track transit engineering, the mounting of the temporary running tracks reduces a working space in the narrow space.

The lateral supports often collide with the temporary running tracks, which reduces the construction space for track section laying on the main line.

In the meantime, a building structure needs to be drilled with holes to fix running track buttresses when the temporary running tracks are mounted, which affects the appearance and performance of the structure to some extent.

When encountering special sections such as stations and civil air defense doors, due to the limitation of structural boundaries, the change in track distances of the temporary running tracks causes the discontinuity of the temporary running tracks, which not only occupies the mounting position of the main line track, but also interrupts the construction of the main line track due to the span change requirements of the track layer, thereby occupying the effective time and space of the track construction to varying degrees.

Due to the need to lay the temporary running tracks, the operation procedures are increased for the construction of the main line track, the construction investment is increased, and the construction cost and labor intensity are increased.

In summary, the existing track layer for track construction is widely used in practical applications, but it brings many constraints and influences to the construction of the main line.

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