Ribbed superposed prestressed reinforced concrete precast slab

Abstract

The invention discloses a ribbed superposed prestressed reinforced concrete precast slab comprising a precast block (1), a hole (2), a later pouring concrete overlapping layer (3) and steel bars (4). The making method of the precast slab comprises the following steps of: firstly precasting the precast block (1) with longitudinal ribs; orderly putting the bottom of a bottom plate of the precast block (1) upwards, placing the steel bars (4) at the bottom of the bottom plate (7) of the precast block and in a longitudinal rib groove (8) or a longitudinal rib hole (9), exerting the prestressing force on the longitudinal steel bar of the bottom plate, and pouring concretes at the bottom of the bottom plate (7) and in the longitudinal rib groove (8) or the longitudinal rib hole (9); and loosening the prestressed steel bars after the later pouring concrete reaches a certain strength, and forming the ribbed superposed prestressed reinforced concrete precast slab. Because the precast block (1) with a bottom plate side bump (11) is firstly precast, the precast block (1) can be made by pouring or extruded and molded in batches in a fixed mold. The invention has simple making processes, reduces construction difficulty and improves construction efficiency.

Description

Technical field: [0001] The invention relates to the field of building construction, in particular to a ribbed superimposed prestressed reinforced concrete prefabricated slab. Background technique: [0002] The reinforced concrete assembled floor slab currently used has good integrity, does not require on-site formwork, and is low in cost, easy to hoist and transport. The reinforced concrete prefabricated component of the assembled floor usually uses a ribbed reinforced concrete prefabricated component slab (03227765.2). There are holes on both sides under the longitudinal rib of this ribbed reinforced concrete prefabricated component. The holes on both sides are connected to multiple reinforced concrete prefabricated component slabs, so that the steel bars are arranged in a criss-cross pattern, and the grooves formed by the prefabricated components are filled with concrete to form an assembled floor slab. The floor slab has the advantages of low cost, easy manufacture, and ...

AI Technical Summary

Problems solved by technology

However, the fabrication of this ribbed prefabricated component slab is very cumbersome, mainly because the pouring of the longitudinal rib with holes on both sides needs to install side forms on both sides of the longitudinal rib, and the holes on both sides also need to be equipped with molds, and then place the bottom plate reinforcement, longitudinal Rib reinforcement and pouring concrete, the process is complex, and it is difficult to remove the formwork of the orifice module, which increases the construction time and difficulty of construction, and the construction efficiency is low

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