Manufacturing method and transporting method of steel box girder with high crossbeam

Abstract

The invention provides a manufacturing method and transporting method of a steel box girder with a high crossbeam and relates to the technical field of box girders. The transporting method of the steel box girder with the high crossbeam comprises the following steps that an upper portion steel box girder and a lower portion steel box girder are manufactured; the upper portion steel box girder comprises a top plate, multiple upper webs and multiple upper partition plates, the multiple upper webs and the multiple upper partition plates are fixed to the bottom of the top plate, the lower portionsteel box girder comprises a bottom plate, multiple lower webs and multiple lower partition plates, and the multiple lower webs and the multiple lower partition plates are fixed to the top end of thebottom plate; the upper portion steel box girder and the lower portion steel box girder are transported to the site and connected vertically to form the steel box girder, the upper webs and the corresponding lower webs are connected vertically to form a web, and the upper partition plates and the corresponding lower partition plates are connected vertically to form a partition plate; and when theupper portion steel box girder is transported, multiple supporting cylinders with hydraulic jacks arranged on the tops are used for supporting the upper portion steel box girder onto a vehicle. According to the manufacturing method and transporting method of the steel box girder with the high crossbeam, the upper portion steel box girder and the lower portion steel box girder are manufactured correspondingly and transported to the site and spliced to obtain the steel box girder with the high cross beam, the splicing precision of the steel box girder is improved, and the construction period isshortened.

Description

technical field [0001] The present application relates to the field of box girders, in particular, to a manufacturing method and transportation method of a girder high steel box girder. Background technique [0002] Steel box girder is a common structural form of long-span bridges. With the increase of municipal steel box span, the girder height will also be greatly increased, so that the girder height requirement of the existing municipal steel box will reach 6-9m, while the current Some municipal and high-speed roads have a maximum transportation height limit of 4.5 meters, which greatly limits the transportation of high-girder box girder segments, making it difficult to transport high-girder steel box girders to the site for operation. [0003] At present, the existing on-site installation method of girder and high-steel box girder mainly adopts the form of transportable plate unit made in the factory, then transported by car, and the box girder is assembled and formed on...

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Problems solved by technology

[0002] Steel box girder is a common structural form of long-span bridges. With the increase of municipal steel box span, the girder height will also be greatly increased, so that the girder height requirement of the existing municipal steel box will reach 6-9m, while the current Some municipal and high-speed roads have a maximum transportation height limit of 4.5 meters, which greatly limits the transportation of high-girder box girder segments, making it difficult to transport steel box girders with high girders to the site for operation

[0003] At present, the existing on-site installation method of girder and high-steel box girder mainly adopts the form of transportable plate unit made in the factory, then transported by car, and the box girder is assembled and formed on the project site through loose assembly. However, there are many methods for this method. Disadvantages: First, the structures manufactured in the factory are mostly in the form of plate units or rods. Since there is no stable force-bearing structure during batch transportation, unpredictable force deformation is prone to occur during transportation. Difficult to match; second, it is difficult to guarantee the on-site positioning accuracy of large-scale plate units, and it is necessary to install a stable structure during assembly. The demand is large, and at the same time, the requirements for the overall assembly site are high, and the construction period is also extended

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