Manufacturing method of ramp steel box girder

Abstract

The invention relates to a manufacturing method of a ramp steel box girder. The manufacturing method comprises the following steps that segmented modeling is performed on the ramp steel box girder byusing three-dimensional modeling software, and components on each bridge segment are lofted to determine the cutting shape of each component; and a plurality of height-adjustable supporting columns are arranged in a tailor-welded area in an array mode, modeling is conducted on a supporting column array on the three-dimensional modeling software, and the distance between each supporting column anda bridge deck slab is obtained to determine the supporting height of each supporting column, so that the bending shape of the plate face of the spliced bridge deck slab is made to be the same as the bending shape of the road face of a designed ramp. According to the manufacturing method of the ramp steel box girder, accurate discharging of all components is achieved, overturning and positioning ofall sections of bridge deck slabs are achieved through the supporting columns, and it is guaranteed that the forming shape of the bridge deck meets the design requirement; the deformation area is corrected in advance, the influence of welding deformation on the whole is eliminated, and rapid butt joint of construction sites is achieved by reserving the positioning matching parts; and the application of the steel box girder to ramp approach bridges is realized, and the development of the steel box girder in the field of bridges is facilitated.

Description

technical field [0001] The invention relates to the field of manufacturing steel box girders, in particular to a method for manufacturing ramp steel box girders. Background technique [0002] Steel box girders are mainly used in the construction of main bridges. Compared with cement box girders, they have the advantages of large load capacity and high earthquake resistance. However, for the ramp approach bridges at both ends of the main bridge, the cement box girder has more advantages, because the bridge body of the ramp is a spiral body with a complex shape. For cement box girders, it can be poured after the mold is manufactured in sections according to the design drawings. The shape of the bridge deck and the interface of the beam end depend on the design of the mold, which is easy to realize; while for the steel box girder , it is easy to manufacture a straight main bridge, but it is very difficult to manufacture a ramp approach bridge with a complex shape, specifically...

AI Technical Summary

Problems solved by technology

[0003] 1. It is difficult to cut the material, most of the blanking boards are not a common rectangle;

[0004] 2. It is difficult to form, especially the forming shape of the bridge body is difficult to meet the design requirements;

[0005] 3. Welding deformation is difficult to control;

[0006] 4. It is difficult to realize the docking between the beam segments

If the application of steel box girders on ramp approach bridges cannot be realized, the development and application of steel box girder bridges will be severely restricted. Therefore, a new manufacturing method for ramp steel box girders is needed to overcome the above difficulties

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