A method for overall horizontal assembly of box-type steel arch beams

Abstract

The invention provides an overall horizontal assembly method for a box-type steel arched girder. The method comprises the steps: firstly, dividing a single-truss box girder into a plurality of sections; then, manufacturing assembly jigs, and blanking all the sections; during the assembly of the box-type steel arched girder, firstly, laying high-side web plate units, and carrying out spot welding among all the high-side web plate units so as to achieve temporary fixation; lofting locating lines, corresponding to transverse partition plate units, on the located high-side web plate units, and locating, mounting and welding all the transverse partition plate units on the high-side web plate units; lofting locating lines, corresponding to the transverse partition plate units, on top plate units of the box girder, and locating, mounting and welding the transverse partition plate units; lofting locating lines, corresponding to the transverse partition plate units, on bottom plate units of the box girder, and carrying out locating, mounting, welding and fixing on the bottom plate units of the box girder and the transverse partition plate units; lofting locating lines, corresponding to the transverse partition plate units, the box girder top plate unit locating lines and the box girder bottom plate unit locating lines on low-side web plate units of the box girder, and locating, mounting and welding the low-side web plate units of the box girder. The method has the advantages that the overall size of the box girder and the accuracy of interface butting can be excellently guaranteed, the overall strength is high, and the stability is good.

Description

technical field [0001] The invention belongs to the technical field of steel structure manufacture, and in particular relates to an integral horizontal combination method of box-type steel arch beams. Background technique [0002] In the manufacture of steel structure box-type steel arch girders (hereinafter referred to as box girders), the current method used more often is: first make plate units in the factory, and then transport them to the installation site to set up full steel pipe scaffolding and then directly assemble them in place (as attached figure 1 ); and then use single-segment vertical method to assemble the pair. When making the pair, first assemble the bottom plate of the box girder, and then locate the diaphragm of the box girder on the bottom plate of the box girder. Beam roof, after completion, carry out physical pre-assembly or use laser tracker for virtual pre-assembly and other methods, and then transport to the site for assembly in sections (as attache...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide an overall horizontal assembly method for box-type steel arch beams, which solves the existing problems in the prior art that need to increase the pre-assembly process, and it is difficult to ensure the size of the overall box girder and the joint position of the interface, and the single-section During the production process, the stability is poor, the total construction period of production and installation is long, and large lifting equipment is required for hoisting, and the cost is high.

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