Steel truss girder assembling scaffold used in construction of steel-concrete composite truss girders

Abstract

The invention discloses a steel truss girder assembling scaffold used in construction of steel-concrete composite truss girders, and belongs to the technical field of bridge construction. The steel truss girder assembling scaffold comprises multiple assembling scaffold units corresponding to longitudinal joints of steel truss girders, each assembling scaffold unit comprises an upper support and a lower support correspondingly arranged on the lower portion of the upper support, each lower support is located on the lower portion of a girder body and comprises four vertically and rectangularly arranged steel columns, the lower end of each steel column is connected with a concrete foundation arranged on the lower portion thereof, each upper support comprises two supports transversely arranged along the steel truss girders and an upper cross girder connected to the upper end of the two side supports, the upper end of each of the four steel columns of each lower support is fixedly connected with a solid girder crossing steel column, and each girder crossing steel column penetrates the corresponding girder body to be fixedly the lower end of each upper support. Strong support points are provided for steel girder assembling, and excessive stress concentration of the girder body concrete poured scaffold at the positions of the steel truss girder joints is avoided..

Description

technical field [0001] The invention relates to a steel truss girder assembly bracket used in the construction of a steel-concrete composite truss girder, which belongs to the technical field of bridge construction. The invention also relates to a construction method of the steel truss beam assembly support and a steel concrete composite truss beam construction support system using the steel truss beam assembly support. Background technique [0002] The Shaoguan Zhenjiang Super Bridge on the decommissioning line has a total length of 2.3km. The 1-88m steel-concrete composite truss girder spans 13# to 14# across the Beijing-Guangzhou Railway’s uplink and downlink lines. On the relaxation curve of R=800m. The bridge deck of steel-concrete composite truss girder adopts prestressed concrete channel girder structure, and above the bridge deck adopts steel truss structure. [0003] In the prior art, for the assembly construction of the steel structure part of the under-supported...

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Problems solved by technology

[0003] In the prior art, for the assembly construction of the steel structure part of the under-supported composite beam, most of them use concrete pouring supports for construction, but for steel structural beams with large loads, the stress of the concrete pouring supports is excessively concentrated at the joints of the steel beams, and its Unable to bear the concentrated stress of the steel beam joints, the elastic deformation of the support is large, which is not conducive to the accurate positioning of the steel beam joints

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