Hollow composite floor slab and construction method thereof

Abstract

The invention discloses a hollow composite floor slab and a construction method of the hollow composite floor slab. The hollow composite floor slab comprises a prefabricated hollow bottom plate and an upper cast-in-place slab, continuous fully-closed preformed holes and semi-closed preformed holes are distributed in the prefabricated hollow bottom plate at intervals, or the continuous fully-closed preformed holes and plate ribs are distributed on the prefabricated hollow bottom plate at intervals, bottom plate rebars are distributed on the prefabricated hollow bottom plate at intervals in the longitudinal direction and the transverse direction, prestress rebars or prestress rebars and non-prestress rebars distributed at intervals are adopted as the bottom plate rebars, and the rebars penetrate through the semi-closed preformed holes or plate rib preformed holes. Concrete is poured on the prefabricated hollow bottom plate to form the upper cast-in-place slab, multiple sets of top rebars are distributed on the cast-in-place slab in the longitudinal and the transverse directions parallel to the bottom plate at intervals, and reinforced concrete is integrally poured on the bottom plate to form the hollow composite floor slab. Only the prefabricated bottom plate needs to be produced and transported, transportation and installation are convenient and fast, formworks are not needed, the crack resistance and the integrity are good, and the construction efficiency is high.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a hollow laminated floor slab and a construction method thereof. Background technique [0002] At present, the floor slab mainly adopts several forms of cast-in-place concrete floor slab, prefabricated floor slab, and assembled integral floor slab. Among them, the cast-in-place concrete floor slab has defects such as large amount of formwork, low construction efficiency, and easy cracking. The prefabricated floor slab has defects such as structural integrity and poor seismic performance. The assembled integral floor slab has troublesome construction, poor integrity, and difficult reliability. and other defects. At the same time, because the composite slab has less or no reinforcement in the post-cast concrete, the integrity between the prefabricated slab and the cast-in-place slab is poor, so the composite slab in the prior art cannot be widely used, so the research and deve...

AI Technical Summary

Problems solved by technology

Among them, the cast-in-place concrete floor slab has defects such as large amount of formwork, low construction efficiency, and easy cracking. The prefabricated floor slab has defects such as structural integrity and poor seismic performance. The assembled integral floor slab has troublesome construction, poor integrity, and difficult reliability. and other defects

At the same time, because the composite slab has less or no reinforcement in the post-cast concrete, the integrity between the prefabricated slab and the cast-in-place slab is poor, so the composite slab in the prior art cannot be widely used, so the research and development A new type of hollow laminated floor slab with more stable structure and better integrity has become an urgent problem to be solved

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