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Temporary overhead device and method for high-speed railway ballastless track lines suitable for high-speed traffic

A ballastless track and high-speed rail technology, applied to roads, tracks, ballast layers, etc., can solve problems affecting line operation efficiency, poor integrity of overhead lines, and cumbersome construction procedures

Active Publication Date: 2020-10-27
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overhead line is composed of steel pad beams and multiple loose sleepers. The construction process is cumbersome and the integrity of the overhead line is poor. With this overhead scheme, the temporary line is erected, and the train runs at a speed limit of 45km / h, which affects the operation efficiency of the line.

Method used

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  • Temporary overhead device and method for high-speed railway ballastless track lines suitable for high-speed traffic
  • Temporary overhead device and method for high-speed railway ballastless track lines suitable for high-speed traffic
  • Temporary overhead device and method for high-speed railway ballastless track lines suitable for high-speed traffic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A temporary overhead device for high-speed rail ballastless track lines suitable for high-speed traffic. When the high-speed rail ballastless track is damaged within a track slab, such figure 1 As shown, it includes a steel backing beam 12, a support 5, a limiting device and a fastener 6. Wherein, in the present embodiment, the total length of the steel pad beam is about 6300mm, and the span is about 5200mm. A steel pad beam with one hole can just replace a Type II track slab. Horizontal and longitudinal centerlines coincide. The steel pad beam 12 is composed of two longitudinal beams 1, two intermediate beams 2 and two end beams 3 between the two longitudinal beams 1, and the two longitudinal beams 1 are respectively located directly below the two steel rails 4 , which mainly plays the role of supporting the line rail; the end beam 3 and the middle beam 2 are arranged perpendicular to the longitudinal beam 1 respectively. The top of the longitudinal beam 1 is provide...

Embodiment 2

[0078] When the high-speed rail ballastless track line is damaged in the range where the two track slabs 11 are connected, the two track slabs 11 will be removed at the same time, and the steel pad beam 12 will be erected above the diseased area. A transition section support 13 of corresponding length is set between the end and the normal track plate 11, such as figure 2 shown. There is still a gap between the transition section support 13 and the steel backing beam.

[0079] The structure of the steel pad beam in this embodiment is consistent with that of the steel pad beam in Embodiment 1.

[0080] The transition section support 13 includes steel members A15 , concrete sleepers 17 and fasteners 6 . Both ends of the concrete sleeper 17 are respectively fixed with steel members A15 by bolts, and the steel members A15 include a top plate, two vertical webs and two vertical connecting plates located below the top plate, such as Figure 7a~7c It is a structural schematic diag...

Embodiment 3

[0085] When a disease occurs within only one track slab in the high-speed rail ballastless track line, it only needs to remove the track slab, and the temporary line can be erected by using four parts: steel backing beam, support, limit device and fastener. The method of erecting temporary lines with this overhead device is as follows:

[0086] 1) Use a rail cutting machine to cut the rail above the diseased track slab, and the breakpoints at both ends of the rail extend 3 to 5m from the end of the track slab longitudinally along the track, and temporarily remove the rail;

[0087] 2) Cut open the wide and narrow joints at both ends of the track slab, release the prestress of the track slab, and remove the track slab with jacks, spreaders and lifting equipment;

[0088] 3) Use a chisel tool to chisel off the mortar bonding layer on the supporting layer to ensure that the exposed supporting layer surface is flat, and then clean the supporting layer surface. On the cleaned suppo...

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Abstract

The invention relates to a high-speed railway ballast-less track line temporarily overhead device suitable for high speed train running and a method, and belongs to the technical field of railway ballast-less track defect elimination. The overhead device comprises steel bearing beams, supporting seats, limiting devices and buckling pieces; when defects occur in the range of one only railway board,the one railway board is replaced with a steel bearing beam exactly, and each of the steel bearing beams comprise two longitudinal beams, middle transverse beams and end transverse beams; the longitudinal beams are box type beams, cross sections of upper flange slabs and lower flange slabs of the longitudinal beams are variable-dimension design. When defects generated in the connecting range of two railway boards, the steel bearing beams are erected above a defect area, and transition section support of a corresponding length is arranged between the two ends of beam bodies of the steel bearing beams and normal railway boards. According to the high-speed railway ballast-less track line temporarily overhead device suitable for high speed train running and the method, the rigidity level of the beam bodies of the steel bearing beams is significantly improved, the structural mode of the limiting devices is reasonably designed, and a temporary line erected through the high-speed railway ballast-less track line temporarily overhead device is enabled to be adapted to high-speed running conditions.

Description

technical field [0001] The invention relates to a temporary overhead device and method for high-speed railway ballastless track lines suitable for high-speed traffic, and belongs to the technical field of railway ballastless track disease elimination. Background technique [0002] According to the operation practice of my country's ballastless track in recent years, the track structure is generally normal, but under the long-term train operating load and the external environment, the track plate cracks, mortar layer bonding failure, support layer damage and other diseases began to appear locally on the line, resulting in Poor track geometry affects the stability and safety of trains running at high speed. Once there is a disease in the track structure, it is necessary to take timely measures to repair it. At present, the cracks and separation joints with small width in the track structure can be repaired by surface sealing method or low-pressure grouting method, and the repa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B1/00
CPCE01B1/002E01B2204/09
Inventor 赵欣欣杨梦蛟鞠晓臣左照坤易忠来涂英辉
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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