Construction method of ultra-large-span double-high-vanadium-cable curved surface beam string

Abstract

The invention provides a construction method of an ultra-large-span double-high-vanadium-cable curved surface beam string. The construction method comprises the steps that simulation analysis and checking calculation are conducted on the construction process before construction, and the beam string is segmented and sectioned through the BIM technology, and model selection is conducted on hoisting equipment; the beam string is machined in a factory and then transported to the site in a spare part mode to be spliced, and thus transportation is convenient; and a corresponding supporting jig frame is arranged, a large-tonnage crane is arranged to conduct high-altitude segmented hoisting on the beam string, construction simulation calculation is conducted on the tensioning process before double-high-vanadium-cable tensioning construction, synchronous monitoring is conducted during construction, and thus tensioning force in the whole tensioning process is controlled. The situation that the structural rigidity of a beam string structural system is weak before prestressed steel cable tensioning construction is solved, and through synchronous tensioning of double high vanadium cables, the problems that stress secondary distribution in the prestressed cable tensioning process, structural deformation caused by prestressed cable tensioning construction and the influence on the mounting quality are prevented.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for a super-large-span double-high vanadium cable curved surface string beam. Background technique [0002] The string beam structure is a hybrid structural system formed by rigid components with upper chords, flexible cables, and struts in the middle. Its structural composition is a new type of self-balancing system and a large-span prestressed spatial structural system. The tension-string beam structure system is simple, the force is clear, the structural forms are diverse, and the advantages of rigid and flexible materials are fully utilized, and the manufacture, transportation, and installation are relatively convenient, so it has a good application prospect. The structural rigidity before construction is weak, and the tensioning process of the prestressed cables will form a secondary distribution of force. The tensioning sequence of the prestressed ...

AI Technical Summary

Problems solved by technology

It solves the situation that the structural rigidity of the tension beam structure system is weak before the tensioning of the prestressed steel cables. Through the synchronous tensioning of the double-high vanadium cables, the secondary distribution of the force during the tensioning process of the prestressed cables is prevented, and the tension of the prestressed cables Pulling construction will cause structural deformation and affect the quality of installation

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