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Girder-exchange construction method for existing railway bridge by successively incremeantal launching framework process

A construction method and technology of existing lines, applied in bridges, bridge construction, bridge maintenance, etc., can solve problems such as large jacking force device requirements, the inability to guarantee the requirement of blocking the construction time for 6 hours, and the limited construction site, etc. The effect of bearing capacity, saving investment and simplifying construction procedures

Active Publication Date: 2008-06-18
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following defects: 1. The seamless railway needs to be dismantled, so the requirement of 6 hours of blockade construction time cannot be guaranteed; the second is that the jacking force device requires a lot; the third is that the construction site is limited

Method used

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  • Girder-exchange construction method for existing railway bridge by successively incremeantal launching framework process

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Embodiment Construction

[0010] The Construction Method of Continuous Pushing Frame Method for Beam Replacement of Bridges on Existing Railway Lines

[0011] Overall construction plan:

[0012] 1. On one side of the existing line, separate slides are set up, and frames are prefabricated on the separate slides.

[0013] ① Slideway construction: There are 3 holes in this frame bridge, and 3 sets of slideways are arranged in each hole. Each set of slideways is composed of a main slideway and two auxiliary slideways. A reaction seat 2 is set at the other end of the prefabricated slideway 1 of the frame. . The sliding layer between the slideway and the frame adopts polytetrafluoroethylene slider 3, the size of the slider is 300×300×10mm, the distance is 1.1m, and the middle is filled with 15mm thick foam board 4.

[0014] The foundation is constructed with high-pressure rotary grouting piles. According to the different load conditions of the slideway foundation, the foundation of the existing beam moving...

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Abstract

The invention relates to a girder replacement construction method of the existing railway line bridges, which applies a method of incremental launching framework. The girder replacement construction method is fulfilled according to seven steps: (1) A split slideway is respectively arranged on one side of the existing line and a framework is respectively prefabricated on the split type slideway; (2) Temporary rest piers are arranged under the existing line bridge and used to upbear a track skeleton, and the locking of seamless lines and the installation of a crossarm track are carried out on the two sections of a grider-replaced section; (3) The temporary rest piers are used to upbear the girder body of the existing line, and the bearings under the existing girder are disassembled; (4) the prefabricated framework is connected with the existing girder by a steel stranded wire; (5) A continuous jack is utilized to tow the steel stranded wire to haul the cascaded framework and the existing girder to the position required by the design; (6) The bearing side under the bottom plate of the prefabricated framework is grouted and reinforced; (7) After dropping the track and replenishing ballast, the line is resumed. The present invention has the advantages that the construction is safe and stable, the cost is reduced, the construction procedures are simplified, the construction period is shortened and the engineering cost is saved.

Description

Technical field: [0001] The invention relates to a building construction method, in particular to a construction method for replacing beams by the continuous pushing frame method of special bridges on existing railway lines. Background technique: [0002] At present, the beam replacement construction method of existing railway bridges generally adopts the method of setting up the back wall, prefabricating the frame on the slide plate, and repeatedly adding the top iron jacking method with the jack. There are following defectives in this method: 1, need dismantling seamless railway, therefore can't guarantee the requirement of blocking construction time 6 hours; The 2nd, jacking device requires very big; The 3rd, construction site is limited. Invention content: [0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and to provide a construction method for changing beams by the continuous pushing frame method of existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01B37/00
Inventor 陈野桑明宇邹永红张兵张唯苏在林黄欣张思兵冯从赵国兵杨昌军何国军
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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