Overall horizontal assembly method for box-type steel arched girder

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 fabrication, and in particular relates to an integral horizontal assembling method for box-type steel arch beams. Background technique [0002] In the manufacture of steel structure box-type steel arch beams (hereinafter referred to as box beams), the most commonly used method is: first make plate units in the factory, and then transport them to the installation site to erect steel pipe scaffolding and then directly assemble them in place (as shown in the attached file). figure 1 ); then the single-segment vertical type is used for grouping production. When grouping is made, the box girder floor is first assembled, then the box girder diaphragm is positioned on the box girder floor, then the webs on both sides are assembled, and finally the boxes are assembled. Beam roof, after completion, carry out physical pre-assembly or virtual pre-assembly with a laser tracker, and then transport it t...

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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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