Girder-declining construction method for steel box girder spanning railway trunk line

A construction method and technology of steel box girders, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as no reflection, no particularly good beam drop construction method, etc., to ensure overall stability and local stability of the beam body resistance, increase the effect of anti-overturning

Inactive Publication Date: 2014-02-05
CHINA RAILWAY 15TH CONSTR BUREAU GRP +1
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AI Technical Summary

Problems solved by technology

If the bridge is in the position of the aircraft take-off and landing channel of the airport and crosses the main railway line, there is currently no particularly good construction method for falling beams
[0003] Moreover, in the process of falling beams, it is also necessary to solve the problems of the overall and local stability of the box girder, which are not reflected in the prior art

Method used

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  • Girder-declining construction method for steel box girder spanning railway trunk line
  • Girder-declining construction method for steel box girder spanning railway trunk line
  • Girder-declining construction method for steel box girder spanning railway trunk line

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Embodiment Construction

[0027] A steel box girder drop girder construction method across the main railway line, which includes the following three stages:

[0028] The first stage: first, the walking-type pushing equipment 101 is used to directly drop the beam 20--40cm, and the steel box girder falls on the box-shaped pad beam 102 of the beam section of the pushing equipment 101, such as figure 1 Shown; Then, remove the horizontal slide block 103 on the top of the pushing equipment and the reaction seat around the horizontal sliding block, drop the beam 40--60cm with the jacking device 104 at the bottom of the pushing equipment, and the steel box girder falls on the I-shaped steel, as figure 2 shown;

[0029] The second stage: the pushing equipment 101 used in the first stage is dismantled, and three pier 106 are set up between the support pad stones 106, and the pier 106 is 100 cm long, 150 cm wide, and 100 cm high. Place a one-way jack 107 on the pier 106, and the one-way jack 107 lifts the steel...

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Abstract

The invention relates to a girder-declining construction method for a steel box girder spanning a railway trunk line. The girder-declining construction method comprises the following stages: a first stage: firstly, adopting a walking type pushing device for directly declining a girder for 20-40cm, and then using a jacking device on the lower part of the walking type pushing device for declining the girder for 40-60cm, and causing the steel box girder to fall onto an I-shaped steel; a second stage: erecting at least three girder-declining supporting pads on a permanent supporting base of the steel box girder, causing the steel box girder to fall onto the girder-declining supporting pads on the position of the supporting base and declining the girder for 8-15cm, and then declining the girder for 10-20cm at each time and declining the girder for 100cm; and a third stage: using a three-way jack for declining the girder till the girder is in place. According to the girder-declining construction method adopting the technical scheme, the steel box girder has a single box integrated fracture surface structure, so that the whole stability of the steel box girder is ensured during the girder-declining process. Meanwhile, a 20mmX850mmX850mm steel plate is additionally arranged in a stressed position of a base plate of the steel box girder, so that the local stress of the base plate of the steel box girder is reduced.

Description

technical field [0001] The invention relates to a beam drop construction method for a bridge, in particular to a beam drop construction method for a steel box girder crossing a main railway line. Background technique [0002] During bridge construction, it is particularly affected by the environment of the construction site. If the bridge is in the position of the aircraft take-off and landing channel of the airport and crosses the main railway line, there is currently no particularly good beam drop construction method. [0003] And in the beam falling process, also need to solve the problem of the whole and local stability of box girder, these all do not reflect in prior art. Contents of the invention [0004] The purpose of the present invention is to provide a method for steel box girder drop beam construction across the main railway line. [0005] To achieve the above object, the present invention adopts the following technical solutions: [0006] A steel box girder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 马明军吴鸿胜李雁鸣年军望李晓汆徐培军尤永学宋延涛
Owner CHINA RAILWAY 15TH CONSTR BUREAU GRP
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