Fabricated steel-concrete composite structure formwork-free floor slab

Abstract

A fabricated steel-concrete composite structure formwork-free floor slab is formed by compositing steel columns, I-shaped steel beams, floor slab bottom formwork assemblies, angle steel for connecting the composite floor slab bottom formwork assemblies, floor slab bottom formwork assembly combining seams, ribbed beams, steel mesh body built-in formworks and concrete. The steel column comprises an H-shaped steel column or a tubular steel column; the lower flange of the I-shaped steel beam is wider than the upper flange of the I-shaped steel beam, and a hole for a ribbed beam steel bar to pass through is prefabricated in a web of the I-shaped steel beam; the floor slab bottom die assembly is an inorganic composite board bottom die assembly; the inorganic composite board is rigid and flexible, at least one surface of the inorganic composite board is a rough surface, and the thickness of the inorganic composite board is less than or equal to 20mm; a functional fixing piece is arranged in the angle steel for connection; the longitudinal rib beam steel bars are arranged on the upper edge of a longitudinal combination seam formed by splicing the two bottom die assemblies. The width of the longitudinal rib beam is formed by the adjacent distance of the steel mesh body built-in molds; and the concrete is directly compounded with the bottom die assembly and the built-in die to form the fabricated steel-concrete combined structure formwork-free floor slab with the disassembly-free floor slab bottom die and the steel mesh body built-in die.

Description

technical field [0001] The invention relates to a prefabricated building system technology, in particular to a formwork-free floor slab technology of a prefabricated steel-concrete composite structure. Background technique [0002] At present, the prefabricated steel-concrete composite structure formwork-free floor is relatively lagging behind. In the prefabricated steel-concrete composite structure project, the cast-in-place hollow floor and truss laminated solid slab are mainly used, and the large-span factory building adopts laminated double-T floor. [0003] The focus and difficulty of the prefabricated steel-concrete composite structure is the floor in the horizontal direction. First, the superimposed height of the laminated double-T floor or laminated truss floor is the sum of the I-shaped steel beam and the double-T floor; the area of ​​the truss floor is partial Small, on the secondary beams set during superposition, the construction difficulty is increased, and the ...

AI Technical Summary

Problems solved by technology

At the same time: the bottom formwork assembly of the floor slab eliminates the necessary detachable floor formwork for the cast-in-place hollow floor, and overcomes the need to cast-in-place concrete at the bottom of the filling body of the cast-in-place hollow floor. The process is cumbersome and other problems; make full use of the organic combination of the bottom formwork components of the floor slab and the built-in formwork components of the steel mesh body to form the rib beam mold of the prefabricated floor slab without formwork, optimize the existing steel-concrete composite structure technology system, and achieve large-span The prefabricated steel-concrete composite structure has laid the foundation; it not only improves the overall safety of the prefabricated building steel-concrete composite structure, but also optimizes the existing steel-concrete composite structure using double T-plate laminated or truss laminated slab floor technology A series of defects such as complicated on-site construction technology, high construction cost, and slow progress of the project

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