Laminated slab, connecting structure of laminated slab and composite beam and construction method

Abstract

The invention discloses a laminated slab, a connecting structure of the laminated slab and a composite beam and a construction method. The laminated slab comprises a prefabricated layer and a post-pouring layer, the prefabricated layer comprises a prefabricated bottom plate and a plurality of shear reinforcements, the post-pouring layer comprises post-pouring concrete and surface layer reinforcements, the post-pouring concrete is poured on the prefabricated bottom plate, and the top ends of the shear reinforcements and the surface layer reinforcements are anchored in the post-pouring concrete. The connecting structure of the laminated slab and the composite beam comprises the laminated slab and the composite beam, the composite beam comprises a steel beam and studs, the prefabricated layer is placed on the steel beam, and a splicing seam between the steel beam and the prefabricated layer is filled with the post-pouring concrete. The construction method of the connecting structure of the laminated slab and the composite beam comprises the steps that S1, the prefabricated layer is produced; S2, the composite beam is hoisted and positioned, the prefabricated layer is hoisted and placed on the steel beam; and S3, the surface layer reinforcements are paved, and the post-pouring concrete is poured. The laminated slab is high in shear resistance and good in integrity; and the connecting structure of the laminated slab and the composite beam and the construction method are high in efficiency, the laminated slab is high in rigidity, and the using amount of the reinforcements is low.

Description

technical field [0001] The invention belongs to the technical field of prefabricated buildings, and in particular relates to a composite slab, a connection structure and a construction method of a composite slab and a composite beam. Background technique [0002] Compared with cast-in-place slabs, laminated slabs have the advantages of less on-site formwork, high production efficiency, low environmental pollution, and fast construction speed. However, the laminated floor slab also has obvious disadvantages. The rigidity of the prefabricated floor slab is small, and it is easy to crack during hoisting and transportation, which greatly limits its application. In view of this, the reinforced truss laminated slab proposed by the Chinese patent CN201320114445.3 overcomes the above-mentioned shortcomings of the laminated floor slab, but has the following disadvantages: the amount of truss reinforcement is large, which only improves the rigidity of the prefabricated slab. The impa...

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Problems solved by technology

However, the laminated floor slab also has obvious disadvantages. The rigidity of the prefabricated floor slab is small, and it is easy to crack during hoisting and transportation, which greatly limits its application.

In view of this, the reinforced truss laminated slab proposed by the Chinese patent CN201320114445.3 overcomes the above-mentioned shortcomings of the laminated floor slab, but has the following disadvantages: the amount of truss reinforcement is large, which only improves the rigidity of the prefabricated slab. The impact on performance is small, the waste of steel bars is serious, and the cost is also greatly increased

Chinese patent CN201620040756.3 proposes a laminated slab with concrete ribs. Although it can effectively improve the stiffness of the prefabricated floor, the connection between the floor and the ribs is relatively complicated, and the production of the laminated slab requires secondary pouring. brings difficulties

During the construction of traditional composite beams, the concrete slabs are often cast-in-place construction methods, but this method requires complex formwork installation and removal on site, and the construction efficiency is low, and the environmental pollution is relatively large

Chinese patent CN201920120142.X proposes a laminated slab composite beam, but it has the following disadvantages: the rigidity of the prefabricated slab is small, and the prefabricated slab is easy to crack during transportation and hoisting

Patent CN201910072931.5 is also a laminated slab composite beam. The prefabricated slab is provided with truss reinforcement. The truss reinforcement can be simplified as a rib on the prefabricated slab, which can effectively improve the rigidity of the prefabricated slab and greatly reduce the prefabricated slab. The risk of cracking during transportation and hoisting; but there are problems: the amount of truss reinforcement is very large, which has little impact on the mechanical performance of the composite beam after the laminated layer is poured, the waste of reinforcement is serious, and the cost is also greatly increased

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