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Temporary reinforcement method for transverse partitioning construction of steel box girder bridge

A steel box girder, transverse technology, applied in the direction of bridges, bridge materials, bridge construction, etc., can solve the problems of reducing the service life and safety of bridges, and large residual stress at welding points, so as to reduce displacement difference and increase fatigue stress Effect

Inactive Publication Date: 2016-06-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, forced welding will cause excessive residual stress at the weld, greatly reducing the service life and safety of the bridge

Method used

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  • Temporary reinforcement method for transverse partitioning construction of steel box girder bridge
  • Temporary reinforcement method for transverse partitioning construction of steel box girder bridge
  • Temporary reinforcement method for transverse partitioning construction of steel box girder bridge

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Embodiment Construction

[0013] like figure 1 , figure 2 , image 3 As shown, a temporary reinforcement method for steel box girder transverse block construction, after the steel box girder is horizontal block, a scissor brace is set on both sides of the web of the beam block separated by a longitudinal rib, the web of the beam block is The beam block web at the division of the steel box girder; the fulcrum of the scissors is set at the junction of the diaphragm and the top and bottom plates, and the material used for the scissors is channel steel or I-beam; the intersection of the scissors is made of steel plates It is welded firmly; the split point of the top plate of the steel box girder and the split point of the bottom plate are misplaced; the split point of the top plate of the steel box girder and the split point of the bottom plate are respectively located on both sides of the web and the horizontal distance is not less than 400mm.

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Abstract

The invention discloses a temporary reinforcement method for transverse partitioning construction of a steel box girder bridge. The temporary reinforcement method particularly includes the following steps that after transverse partitioning of steel box girders, the two sides of each girder block web are each provided with a diagonal bridging at the interval of one longitudinal reinforcement rib, and the girder block webs are arranged in the cutting positions of the steel box girders; and the fulcrums of the diagonal bridgings are arranged at the joints of transverse partitioning plates and top and bottom plates. After the diagonal bridgings are added, the longitudinal flexural rigidity and transverse torsional rigidity of each girder block basically keep consistent, so that the safety in the hoisting process is guaranteed. After the girder blocks are hoisted to a temporary support, the displacements of the girder blocks are basically consistent, and the displacement difference in the longitudinal welding position and the post-welding residual stress are reduced. The top and bottom plates are welded in a staggered mode, the fatigue stress of a welding seam is increased, and the construction safety of the structure is facilitated.

Description

Technical field: [0001] The invention relates to a temporary reinforcement method for steel box girder transverse block construction of each block girder during horizontal block construction of a steel box girder bridge. Background technique: [0002] Due to the limitations of the construction environment, transportation conditions, and hoisting capacity, steel box girder bridges generally adopt the rapid installation method of horizontal blocks. After the steel box girder is divided horizontally into blocks, due to welding requirements, staggered joints must be carried out, resulting in openings in some roofs and webs; and it is often impossible to ensure that each beam contains more than two webs, and the transverse torsional stiffness of each beam block and The longitudinal bending stiffness is weakened and has obvious inhomogeneity. After the blocks are hoisted and placed on temporary supports, there will be non-negligible displacement differences at the welding joints ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D101/30
CPCE01D21/00E01D2101/30
Inventor 汪劲丰张良向华伟王敏权王文浩
Owner ZHEJIANG UNIV
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