Hollow slab of concrete cast in-site

Abstract

The present invention relates to a cast-in-situ concrete hollow plate, it includes reinforced concrete and form members, said form members are contained in the reinforced concrete, said form members are alternatively arranged, between them is set a cast-in-situ concrete rib, its upper portion is cast-in-situ reinforced concrete upper plate and its lower portion is cast-in-situ reinforced concrete lower plate. The form member includes upper plate and peripheric side wall, said upper plate and peripheric side wall are combined together to form an open basin-shaped member. It is characterized by that the described upper plate has a top window for making concrete construction operation; on the top window a top window cover or a top window plug is set. The form member can be used for in-situ casting reinforced concrete or prestressed reinforced concrete hollow floor, roof, wall body, foundation bedplate and open-web bridge, etc.

Description

(1) Technical field [0001] The invention relates to a cast-in-place concrete hollow slab. (2) Background technology [0002] At present, most buildings with brick-concrete structure and frame structure use prefabricated hollow slabs as cast-in-place concrete hollow slabs. This kind of cast-in-place concrete hollow slabs has the advantages of fast construction speed and low cost. There is no firm connection between the boards, and only cement mortar is used to fill the gaps. Therefore, not only the integrity is poor, which is not conducive to earthquake resistance, but also cracks in the gaps and water seepage often occur, causing great inconvenience and psychological pressure to the residents. In order to solve the above problems, many buildings have adopted the method of cast-in-place concrete floor slabs (hollow, solid). Although the cast-in-place concrete floor slab solves the problems of earthquake resistance and cracking, a large number of templates are used during con...

AI Technical Summary

Problems solved by technology

However, the lower floor of this cast-in-place concrete hollow slab is a prefabricated thin plate, and there are joints between them, so the integrity is poor. The construction is inconvenient, the cast-in-place concrete is not compact, and problems such as honeycomb pits are prone to occur. At the same time, the cast-in-place concrete ribs formed between the formwork members in this cast-in-place concrete hollow slab are all rectangular cast-in-place concrete ribs , its stress performance is not very reasonable, it is often necessary to increase the cross-sectional size of the cast-in-place concrete rib, increase the amount of steel bars and concrete, and increase the cost of the cast-in-place concrete hollow slab. Therefore, the development of a new type of cast-in-place concrete hollow slab has been urgent need

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