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Construction method of ballastless track in heavy haul railway tunnel group

A ballastless track and construction method technology, applied in tracks, track laying, track maintenance, etc., can solve the problem of not meeting the high-precision and high-efficiency requirements of heavy-duty railways, and achieves alleviation of the contradiction between operation and maintenance. The effect of the accurate laying position

Active Publication Date: 2022-02-18
CHINA RAILWAY SIXTH GRP CO LTD +2
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the current ballastless track construction cannot meet the high-precision and high-efficiency requirements of heavy-haul railway construction, the present invention provides a construction method for heavy-duty railway tunnel group ballastless track

Method used

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  • Construction method of ballastless track in heavy haul railway tunnel group
  • Construction method of ballastless track in heavy haul railway tunnel group
  • Construction method of ballastless track in heavy haul railway tunnel group

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Embodiment

[0353] 1. Project overview

[0354] The starting and ending mileage of MHTJ-17 bidding section of the new Mengxi-Central China railway coal transportation channel civil engineering project: DK828+253.5~DK883+289.5, of which the main line of the whole line is 55.036 kilometers long, and the uplink and downlink lines are 2.2 kilometers. There are 26 tunnels in this tender section, with a total length of 16804.3 meters, accounting for 30.5% of the total length of the line. In principle, ballastless tracks are laid on tunnels with a length of 1 km or more, and elastic bearing block type ballastless tracks are generally laid in the tunnels; when ballastless tracks in tunnel group sections are considered to be laid in sections, heavy-duty Cushion buried ballastless track. The total length of the ballastless track (single track) is 24.157km.

[0355] 2. Application

[0356] The MHTJ-17 bid section of the new Mengxi-Central China railway coal transportation channel civil engineerin...

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Abstract

The invention relates to the construction technology of heavy-duty railways, in particular to a construction method for ballastless tracks of heavy-duty railway tunnel groups. The ballastless track construction of the present invention is based on the characteristics of high construction precision and difficult control of the ballastless track bed, adopting the principle of laying nearby and facilitating precision control, and hoisting the double-block sleeper near the construction track bed to the position to be laid , and after key processes such as steel bar binding, rail row assembly, comprehensive grounding, and rough track adjustment, the geometric dimensions of the track are fine-tuned with the track inspection trolley measurement system to meet the design accuracy requirements, and finally the ballast concrete is poured in one shot. The process has the characteristics of simple operation, safety and practicality, precise track geometry and fast positioning.

Description

technical field [0001] The invention relates to the construction technology of heavy-duty railways, in particular to a construction method for ballastless tracks of heavy-duty railway tunnel groups. Background technique [0002] The design speed of the newly built railway coal transportation channel from West Inner Mongolia to Central China: 120km / h, the main line is designed according to the heavy-duty track, and the heavy-duty track direction (that is, the downward left line) of the double-track section is reserved for extra-heavy track structure conditions. Ballasted track is mainly used for the track structure of the main line. In principle, ballastless track is laid for tunnels with a length of 1km or more, and ballastless track is laid in sections. Elastic support block type ballastless track is generally laid in the tunnel. When the ballastless track in the tunnel group section is considered to be laid in sections, the heavy-duty bolster buried ballastless track is la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B1/00E01B29/00
CPCE01B1/002E01B29/005
Inventor 李金龙宗书合张伟关军张超赵骏韩翔吕双年高志平魏晓帆顾嘉伟
Owner CHINA RAILWAY SIXTH GRP CO LTD
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