Manufacturing method of divergent steel arch with rigid connection

Abstract

The invention discloses a manufacturing method of a divergent steel arch with rigid connection and relates to the field of bridge construction. The manufacturing method of the divergent steel arch with rigid connection comprises the following steps that dividing an arch box section into an arch foot section and an arch foot arch rib transition section to be manufactured independently, and dividing a lower arch and two upper arches into a plurality of sections to be manufactured independently; erecting a half arch rib pre-assembly jig frame for pre-assembly, carrying out ground marking and lofting on arch foot sections, arch foot arch rib transition sections and lug plate positions of each section, firstly positioning a lower arch on the pre-assembly jig frame, then carrying out matched cutting on inter-section allowance of the lower arch, and taking the lower arch as a positioning reference for pre-assembly of two upper arches after pre-assembly of the lower arch is completed; after the lower arch and the upper arch are positioned on the assembling jig frame, assembling oblique connection and parallel connection, and welding connecting weld joints of the oblique connection, the parallel connection and the arch ribs; and after the divergent steel arch is disassembled, transporting the divergent steel arch in the form of single arch rib rod pieces of the lower arch and the upper arch. According to the manufacturing method of the divergent steel arch with rigid connection, the manufacturing precision and the field precision of the divergent steel arch can be guaranteed.

Description

technical field [0001] The application relates to the field of bridge construction, in particular, to a method for manufacturing divergent steel arches with rigid connections. Background technique [0002] With the continuous development of our country's economy, the landscape design of urban bridges is becoming more and more important. The design of modern bridges is no longer purely for the purpose of satisfying traffic functions. The huge span, strong physical expression, extraordinary size symmetry and beautiful appearance of the bridge will all have an effect of improving the urban landscape, or it will be naturally integrated or have a symbol The purpose of sexual landscape enhancement. At present, the main forms of steel structure bridges in my country include steel arch bridges, cable-stayed bridges, and suspension bridges, most of which are standard structural forms, and a set of mature manufacturing methods has been formed. However, the structures of new urban la...

AI Technical Summary

Problems solved by technology

[0003] The steel arch of a general steel arch bridge is a self-contained system, only the arch foot is rigidly connected to the bridge deck, and the rest of the parts are mostly connected to the bridge deck by cables or suspenders, which is a flexible connection. The length of the cables can be adjusted according to the actual situation during assembly. However, the upper part of the bridge deck is a steel arch steel frame structure, and the steel arch is an arch box that diverges to three spatial arch rib structures. Rod connection and matching points are all spatial points, so the requirements for manufacturing line type and lug plate positioning are extremely high. If there is a deviation, the rigid connection will be difficult to close, resulting in very difficult manufacturing and assembly.

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