Prestressed composite floor slab construction method without support

Abstract

The invention discloses a prestressed composite floor slab construction method without support. A large-span prestressed composite floor slab is invented by researching the large-span floor compositeslab, the large-span prestressed composite floor slab forms a composite structure with one or more beams in the construction process, the complicated processes of assembly, formwork support, bottom support arrangement, joint treatment and the like of a traditional floor panel are solved, no formwork support system is needed in construction, construction period is effectively shortened, and the construction cost is saved.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a support-free prestressed laminated floor construction method. Background technique [0002] Prefabricated buildings have the advantages of high industrialization level, fast construction speed, and avoiding wet work. In recent years, with the improvement of my country's requirements for green construction, energy conservation and emission reduction, and the substantial increase in labor market prices, prefabricated concrete structures have been widely promoted and applied in various provinces across the country. Floor slabs began to change from traditional integral cast-in-place or factory prefabrication to laminated floor slabs with factory prefabricated bottom slabs and on-site cast-in-place laminated floors. [0003] Compared with traditional integral cast-in-place slabs, laminated slabs reduce the amount of formwork and scaffolding at the construction site, imp...

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Problems solved by technology

[0006] (2) The thickness of the prefabricated prestressed floor of the common reinforced truss laminated slab reaches 60mm-80mm, resulting in a large self-weight, which is difficult to apply to the situation of a large span, and during installation and construction, multiple temporary supports need to be arranged under the prefabricated prestressed floor , and widely used in short-span fields

Concrete ribs or steel plate ribs improve the out-of-plane stiffness of the prefabricated prestressed floor, but when concrete ribs are used, the formwork is complicated, the ribs and the floor need to be constructed twice, the production efficiency is low, and there are construction joints between the ribs and the floor. As a result, the integrity of the prefabricated prestressed floor is poor; when using steel plate ribs, the steel web is easy to cut the prefabricated prestressed floor during hoisting, transportation and installation, resulting in a short service life of the product

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