Bridge beam arch rib section manufacturing process

Abstract

The invention relates to a bridge beam arch rib section manufacturing process. The manufacturing process comprises the three steps of truss piece splicing, wind bracing transverse combination splicing and integral section splicing. The bridge beam arch rib section manufacturing process has the advantages that multi-section matching and splicing are adopted, and for each section, related components can be matched and spliced by means of specific jig frames, so that line-type precision of arch rib sections is ensured; labor amount of integral pre-assembly of the bridge beam arch rib sections is reduced, the splicing period is shortened, and working efficiency is promoted.

Description

technical field [0001] The invention belongs to the technical field of bridge manufacturing, and in particular relates to a manufacturing process of a bridge arch rib section. Background technique [0002] With the increasing number of railway and highway construction projects in our country, more and more bridges are being built in deep mountains and canyons with poor natural conditions, especially long-span steel arch bridges, because this structure is especially suitable for deep valleys and rapid construction. The plateau canyon area with harsh environment. Therefore, more and more attention is paid to the manufacturing method of bridge arch ribs, especially for the unfavorable situation of construction conditions, then its manufacturing method just seems to be particularly important. [0003] Among the bridges studied by the present invention, the main bridge adopts a double-layer truss arch bridge with a mid-support type, and the span is arranged as 496m. The main lin...

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Problems solved by technology

After searching, it was found that the Chinese patent number 201310367055.1 proposed a bridge arch rib manufacturing method, including the following steps: 1) blanking and layout; 2) blanking; 3) rolling pipe; 4) welding internal reinforcement; Ground sample and assembled steel pipe; 6) Determine the position of the suspender, marked by punching holes; 7) Install the support at the position of the suspender and weld it; 8) Weld the butt weld of the pipe and pipe; 9) Weld the arch rib; 10) 1. Production of oblique supports; 11) Subsection production and pre-assembly; 12) Mark the subsections of the arch ribs, and one code for the same joint; 13) Paint; In the production and assembly, the process is simplified, and the quality of assembly and welding is also significantly improved, which greatly guarantees the construction quality of the arch rib of the bridge; but the production method has the following disadvantages: 1. Steel pipes, but the steel pipe sections use more steel materials, and the manufacturing is relatively complicated, and the connection is inconvenient; 2. This manufacturing method cannot meet the requirements for the multi-segment matching and assembling of the arch rib section. The camber requirement is extremely high, but this production method is not easy to control the linear camber

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