Horizontal splicing corrugated steel web plate combined box girder and construction method

Abstract

The invention discloses a horizontal splicing corrugated steel web plate combined box girder comprising a combined box girder formed by horizontally splicing multiple precast I-shaped girder units (1); and a top plate lower edge steel plate (2-1) and a bottom plate lower edge steel plate (3-1) are respectively connected to the lower end faces of a top plate wet jointing seam (2) and a bottom plate wet jointing seam (3) of two adjacent precast I-shaped girder units (1). The construction method comprises the steps of mounting the multiple precast I-shaped girder units onto a bridge pier abutment, fixing the top plate lower edge steel plates connected with shearing force nails to the top plate wet jointing seams of every two adjacent precast I-shaped girder units, and pouring top plate wet jointing seam concrete (2-3) by taking the top plate lower edge steel plates as support templates; and then fixing the bottom plate lower edge steel plates connected with the shearing force nails to the bottom plate wet jointing seams of every two adjacent precast I-shaped girder units, and pouring bottom plate wet jointing seam concrete (3-3) by taking the bottom plate lower edge steel plates as the support templates. The horizontal splicing corrugated steel web plate combined box girder and the construction method achieve the aims of simplifying the operation process, reducing work amount, shortening construction period, reducing weight and ensuring construction quality.

Description

technical field [0001] The invention belongs to the technical field of road and railway bridges, and mainly relates to a horizontally assembled corrugated steel web composite box girder and a construction method. Background technique [0002] Prestressed concrete box girder with corrugated steel web is a new type of steel-concrete composite structure, which makes full use of the advantages of high compressive strength of concrete and high shear strength of corrugated steel web, effectively combining steel and concrete It improves the use efficiency of materials and is an economical, reasonable and efficient structural form. [0003] The known way to realize the horizontally assembled corrugated steel web combined box girder is as follows: prefabricated corrugated steel web prestressed concrete I-beams in the factory, transported and installed on the bridge abutment, and put the transverse bridge to the adjacent two I-beam member units. The upper and lower wings, transverse ...

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Problems solved by technology

However, the above-mentioned composite box girders have the following problems: the wet joint concrete of the post-cast roof and bottom plate needs to support the formwork, which makes the construction on site difficult; Differences tend to cause cracks at the interface between post-cast wet joint concrete and precast concrete beams; precast corrugated steel web prestressed concrete I-beams and post-cast roof and floor wet joint concrete have different prestress degrees, and post-cast Concrete at the wet joints of the top and bottom slabs is easy to crack; since the wet joints of the top and bottom slabs adopt reinforced concrete structure, the distance between the prefabricated corrugated steel web prestressed concrete I-beams increases, which will lead to a rapid increase in the thickness of the roof and bottom slabs, so that The deck width of the box girder combined with corrugated steel webs assembled horizontally is limited, and at the same time, the overall weight of the structure will be increased

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