Cavity member for hollow concrete slab

Abstract

The invention discloses a cavity member for a hollow concrete slab, which comprises a reinforced concrete bottom plate (1) and at least two reinforced concrete side plates (2), wherein the side plates (2) are upright on the bottom plate (1) to form a strip groove plate member. The cavity member is characterized in that: at least two light filling blocks (3) are filled into a strip groove of the strip groove plate member, at least one longitudinal full-length prestressed steel bar (4) is arranged in the bottom plate (1) at the bottom of the side plates (2), at least one longitudinal full-length prestressed steel bar (4) is arranged at the top of the side plates (2), the light filling blocks (3) are arranged at intervals, an inner rib cavity (5) is formed between the light filling blocks, the inner rib cavity (5) is orthogonally or obliquely crossed with the side plates (2), the side plate (2) between the intervals of the light filling blocks (3) is provided with a gap (6), and a tying pier (7) for tying the side plates (2) is arranged on the gap (6). The cavity member is suitable for hollow slabs, hollow floors, roofs, foundation bottom plates, walls and hollow bridges of cast-in-place reinforced concrete or prestressed reinforced concrete.

Description

[0001] This application is a divisional application of an invention patent application with a filing date of November 22, 2004, an application number of 200410092837X, and a title of “A Cavity Member for a Concrete Hollow Slab”. (1) Technical field [0002] The invention relates to a cavity component for a concrete hollow slab. (2) Background technology [0003] Ribbed reinforced concrete prefabricated components are used to assemble lightweight slabs, which can bear two-way loads, do not need on-site formwork, and are low in cost, easy to hoist and transport. This ribbed prefabricated component includes a strip-shaped bottom plate and a long strip-shaped side plate, and the side plate and the bottom plate are connected as a whole to form a T-shaped or long-strip trough-shaped component. Usually the length of the side slab of this prefabricated component is the same as the length of the bottom slab. When this prefabricated component is assembled to form a lightweight slab th...

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Problems solved by technology

Usually the length of the side plate of this prefabricated component is the same as the length of the bottom plate. When this prefabricated component is assembled to form a lightweight slab bearing two-way loads, the cast-in-place concrete cannot pass through the side plate, and cannot form a connected crossing with the side plate. Cast-in-place concrete ribs, at the same time, in the direction perpendicular to the side plate, various pipeline layouts need to be drilled and threaded on site, which not only wastes concrete materials, but also wastes man-hours. Moreover, after cast-in-place concrete, the assembled lightweight panels are solid. Concrete consumes a lot of material, and the lightweight slab is heavy, so it is not suitable for large-span pouring. Therefore, it is urgently needed to develop a new type of cavity member for concrete hollow slabs.

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