Externally expanding, assembling, converting and lifting method for medium/small span steel structure roof net rack

Abstract

An externally expanding, assembling, converting and lifting method for a medium / small span steel structure roof net rack belongs to the field of site construction in building construction engineering. The method comprises the following steps of assembling a lifting unit in the center of the steel structure roof net rack, arranging a shifting rod, installing a chain block and a cable rope, using the shifting rod to lift, externally expand and assemble the lifting unit of the steel structure net rack in a subsection mode, utilizing a concrete column (13) to continue lifting preparation operation, converting the chain block (12), utilizing the concrete column (13) to lift, externally expand and assemble the lifting unit of the steel structure net rack in a subsection mode, lifting the steel structure net rack to the design height, and fixing the steel structure net rack. The externally expanding, assembling, converting and lifting method for a medium / small span steel structure roof net rack solves the difficult problem that when the steel structure net rack is lifted in a medium / small span building, the steel structure net rack cannot be wholly lifted on the ground due to the fact that large lifting equipment cannot enter the medium / small span building and further solves the difficult problem that when only the shifting rod is utilized to lift the steel structure net rack, the difficult problems of the lifting construction the steel structure net rack cannot be solved.

Description

technical field [0001] The invention discloses a medium / small-span steel structure roof net truss external expansion, assembly, conversion and lifting method, which belongs to the field of building construction site construction. It specifically relates to a lifting method carried out in medium / small-span buildings, and is especially suitable for curved surfaces and flat grid structures. Background technique [0002] Steel grid structure is a relatively common structural form. It has light weight, high rigidity, and can be processed in a factory. It is often used in roof structures. In actual engineering construction, when the steel structure enters construction, the civil concrete structure has generally been constructed, and the conditions of the construction site on site cannot be changed. [0003] There are various methods of grid installation, which can be summarized into seven main on-site installation methods, which are high-altitude bulk method, strip or block insta...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a medium / small-span steel structure roof network frame external expansion, assembly, conversion and lifting method, which solves the problem of steel structure network frame alignment in medium / small-span buildings. When lifting, due to the inaccessibility of large-scale lifting equipment, the overall lifting of the steel structure network frame cannot be carried out on the ground, and the lifting construction problem of the steel structure network frame cannot be solved when simply using pull rods to lift

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