Precast hollow floor for stress island based hollow floor system

Abstract

The invention provides a precast hollow floor for a stress island based hollow floor system. The precast hollow floor comprises a precast hollow floor body consisting of reinforced concrete ribbed beams, steel mesh concrete lower flange slabs and ribbed steel mesh hollows. The precast hollow floor body comprises at least two longitudinal reinforced concrete ribbed beams and a plurality of transverse reinforced concrete ribbed beams, wherein two ends of the longitudinal reinforced concrete ribbed beams are exposed. At least one corner not subjected to concrete casting exists in every ribbed beam steel bar. A plurality of steel bar rings are arranged on the upper surface of every reinforced concrete ribbed beam, and ribbed steel meshes are composited in the steel mesh concrete lower flange slabs, are formed by punching and pressing sheet steel and are made into the ribbed steel mesh hollows consisting of hollowed-out meshes, hollowed-end meshes and supports. The ribbed steel mesh hollow bodies on the upper surface of the precast hollow floor body are exposed, and the surfaces of the exposed ribbed steel mesh hollow bodies and the upper surfaces of the reinforced concrete ribbed beams are kept on the same horizontal plane.

Description

technical field [0001] The invention relates to a prefabricated building system technology, in particular to a fabrication technology of a prefabricated cavity floor for a force island cavity floor. Background technique [0002] In the process of housing construction in the country, hollow prefabricated slab structures, large slab structures, cast-in-place concrete structures, cast-in-place concrete hollow floor slab structures, cast-in-place frame shear wall structures, etc. are used for floor slabs. With the process of residential industrialization, steel - Mixed composite structure and steel-concrete combined cavity floor structure system has been developed rapidly, and a new upsurge in prefabricated buildings is coming. [0003] For example, the ZL98231113.3 concrete thin-walled cylindrical member declared by the applicant is made into a sealed cylindrical filling body, which provides a tubular hollow filling body for the realization of the cast-in-place hollow floor, an...

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Problems solved by technology

[0007] The purpose of the present invention is to promote the process of prefabricated buildings, to improve the existing frame shear wall structure system and frame core tube structure system by using a prefabricated cavity floor slab for the force-bearing island cavity floor; to make full use of the advantages of factory industrialization , to produce prefabricated prefabricated components to solve the problems of construction, environmental protection, weight, cost, and work efficiency in the existing system; the overall force of the building structure is solved by pouring reinforced concrete on site, combining industrial production of prefabricated components with cavity On-site pouring of reinforced concrete is organically combined to optimize the existing frame-shear wall structure system technology, transform and upgrade the existing prefabricated frame-shear wall structure system, and replace it; solve the problem of overall on-site pouring controllability in the existing structural system Poor performance, strong technical implementation, environmental pollution caused by on-site construction, heavy weight, high construction cost, slow progress of the project, a large number of building formwork and steel supports are exempted, resulting in long formwork time and affecting the construction speed; beam-column joints have small shear force area , it is easy to cause safety hazards; especially, the use of the corners of the uncast concrete in the rib beam reinforcement of the prefabricated cavity floor slab forms the cavity floor of the force island

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