Construction method of super-long cantilever cable-supported grid structure

Abstract

The invention relates to the technical field of prestressed steel structure construction, and discloses a construction method of a super-long cantilever cable-supported grid structure. The method comprises the following steps that the laying position of an annular cable is determined, and an installation operation platform of a cable clamp is erected; a mounting operation platform of a radial cable is set up; the annular cables and the radial cables are paved; one end of the radial cable is connected with the cable clamp, and the other end is connected with a lifting tool; a supporting jig frame of a grid roof is arranged; the grid roof is mounted; when the grid roof is installed, a temporary cable-stayed structure is installed; the supporting jig frame of the outer ring is dismantled in sections; the cable system structure is integrally hoisted; the radial cables are integrally tensioned in a graded mode, and the grid roof is automatically separated from the supporting jig frame of the outer ring; a V-shaped supporting rod is installed; and the temporary cable-stayed structure is dismantled, the supporting jig frame is unloaded, and construction of the cable-supported grid structure is completed. According to the construction method of the super-long cantilever cable-supported grid structure, the flexible component is integrally lifted and integrally and synchronously tensioned, the construction efficiency is high, and the tensioning effect is good.

Description

technical field [0001] The invention relates to the technical field of prestressed steel structure construction, in particular to a construction method of an ultra-long cantilever cable-supported grid structure. Background technique [0002] Where the steel structure is applicable, it can be replaced by prestressed steel structure to improve structural performance and reduce steel consumption, especially in the case of large spans and heavy loads, the economic benefits are more significant. At present, prestressed steel structures are widely used in building structures, such as stadiums, exhibition centers, theaters, shopping malls, hangars, terminal buildings and other large public buildings. [0003] In large-scale public buildings with large spans, prestressed trusses or tension trusses are mostly used as the structural support of the roof, and they are mostly composed of rigid member upper chords, lower flexible cables, and vertical braces connected in the middle. Espec...

AI Technical Summary

Problems solved by technology

[0006] The technical problems to be solved are: in the construction process of the existing cable-supported grid structure, most of them are segmented lifting and stretched in batches, the construction process is complicated, the operation is difficult, the safety hazard is large, the tension forming efficiency is low, and the effect is poor , prone to deformation of the roof

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