Large-span prefabricated ribbed prestressed hollow bidirectional laminated slab

Abstract

The invention provides a large-span prefabricated ribbed prestressed hollow bidirectional laminated slab. The large-span prefabricated ribbed prestressed hollow bidirectional laminated slab comprisesprefabricated bottom plates, longitudinal ribs, transverse ribs and a post-cast layer, wherein the longitudinal ribs and the transverse ribs are arranged on the bottom plates in a staggered mode to form cells provided with light filling blocks; prestressed steel strands are arranged in the longitudinal ribs in the longitudinal direction, and steel bar meshes composed of longitudinal steel bars andtransverse steel bars are arranged in the bottom plates and positioned below the prestressed steel strands; a plurality of shear-resistant steel bars are pre-buried in the longitudinal ribs and the transverse ribs and protrude out of the upper surfaces of the longitudinal ribs and the transverse ribs, and a plurality of shear-resistant steel bars are pre-buried in the bottom plates and protrude out of the upper surfaces of the light filling blocks, and slurry leakage holes are pre-formed in the positions, provided with the shear-resistant steel bars, in the light filling blocks; connecting steel bars in lap joint with the transverse steel bars in the adjacent bottom plates are arranged in a joint area, and longitudinal through-length constructional steel bars are arranged; and laminated slab upper steel bars are arranged in the post-cast layer. The large-span prefabricated ribbed prestressed hollow bidirectional laminated slab is light in self-weight, free of reverse arches and suitable for guaranteeing cooperative work among bidirectional plates, the post-cast layer and the prefabricated plates, formwork erecting is not needed in the joint area, post-tension prestressed steel bars are not arranged, the structural stress is reliable, and the construction efficiency is high.

Description

technical field [0001] The invention belongs to a prefabricated concrete hollow floor structure, in particular to a large-span prefabricated ribbed prestressed hollow two-way laminated slab, which belongs to the field of general assembled building structures. Background technique [0002] In recent years, my country has accelerated the transformation and upgrading of the construction industry. Prefabricated buildings have entered a stage of rapid development due to their high degree of industrialization, reliable construction quality, high construction efficiency, energy saving and environmental protection. The development of prefabricated buildings has become a national policy for the development and reform of my country's construction industry. [0003] According to the "Technical Regulations for Prefabricated Concrete Structures" JGJ1-2014, laminated floors with a span of less than 6m should use ordinary truss reinforced concrete laminated slabs. However, for floors with ...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of self-heavy prefabricated slabs, poor connection performance between adjacent prefabricated slabs, unsuitable for two-way slabs, large reverse arch of prefabricated slabs, and poor cooperative performance between post-casting layer and prefabricated slabs in the range of lightweight filling blocks. , Prefabricated slab seam area needs formwork pouring concrete or post-tensioned prestressed steel bars to cause complex construction. A large-span prefabricated ribbed prestressed hollow two-way laminated slab is proposed. The invention has light weight, no reverse arch, and is applicable It has the advantages of ensuring cooperative work between two-way slabs, post-cast layers and prefabricated slabs, free of formwork in the joint area, and no post-tensioned prestressed steel bars, etc.

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