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Long continuous structural steel box beam or combination box beam construction method

A construction method and technology of structural steel, applied in the direction of bridges, bridge materials, bridge construction, etc., can solve the problems of difficult control of construction period, difficult safety and quality control, large welding workload, etc., and achieve the effect of reducing welding workload.

Inactive Publication Date: 2009-02-18
CHINA MAJOR BRIDGE ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problems of large welding workload at the construction site of long continuous structural steel box girders or composite box girders, difficulty in controlling the construction period, and difficulty in safety and quality control

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  • Long continuous structural steel box beam or combination box beam construction method
  • Long continuous structural steel box beam or combination box beam construction method
  • Long continuous structural steel box beam or combination box beam construction method

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Embodiment Construction

[0022] Hereinafter, the construction method of the channel steel beam of the 105m steel-concrete composite box beam of the Shanghai Yangtze River Tunnel Bridge is taken as an example to illustrate the present invention in detail:

[0023] The combined span of the steel-concrete composite box girder of the Shanghai Yangtze River Tunnel Bridge is (85+5×105+90)m, and the continuous box girder structure of the steel-concrete composite structure is adopted. The emergency parking zone is arranged according to the two-way four-lane + emergency parking zone + rail transit arrangement in the long term, and the bridge width is 2×17.15m. The plane line shape of a combined box girder is the curve section of the design road centerline. The south side of the bridge transitions from a curve with a radius of curvature R=8000m to a straight line, and the north side connects from a straight line to a curve with a radius of curvature of R=7000m. When putting together, the 85, 90 and 105m box girders...

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Abstract

The invention discloses a long continuous steel box girder or combined box girder construction method, including the following steps: 1, segment division and plate unit division; 2, butt welding the fulcrum segmental box girders and standard segmental box girders at a prefabrication plant, namely, pre-splicing the segmental box girders of a full span box girder and the first box girder segment of the adjacent span box girder through long line method on a segmental box girder molding bed on which plane curves and pre-camber are arranged; marking the box girder segments, taking away the segmental box girders of the full span box girder, leaving the first box girder segment of the adjacent span box girder, and continuing to splice and weld the segmental box girders of the rest full span box girders; 3, generally assembling the full span box girders in the prefabrication plant. The invention adopts full span prefabrication and arrangement to construct a long continuous steel box girder or combined box girder, thus greatly reducing welding work load at the site. The invention ensures that the adjacent spans close smoothly after the steel girders are arranged and meets the requirements of light large span, precast assembly and quick construction.

Description

Technical field [0001] The invention relates to a construction method of a bridge box girder, in particular to a construction method of a long continuous structural steel box girder or a combined box girder. Background technique [0002] The superstructure of the bridge generally adopts the form of box girder. For the continuous beam form of steel box girder and steel-concrete composite beam structure, how to control the linear shape, ensure the linear matching between the steel beam segments and the correct connection of the steel box girder cross section, and ensure the smooth connection between adjacent holes after the steel beam is erected Closure is the focus of control during the construction process. At present, steel beam construction generally adopts the construction technology of factory segment manufacturing and on-site beam segment assembly. The disadvantage of this method is that the on-site welding workload is large, and it is greatly affected by weather and site co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D2/04E01D101/30
Inventor 秦顺全陈理平张君武殷秀凯李方敏张捍红黄勇魏军
Owner CHINA MAJOR BRIDGE ENG
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