Cavity member for concrete hollow core slab

Abstract

The invention relates to a cavity member for a concrete hollow core slab, which comprises a reinforcing steel bar concrete bottom plate (1) and at least two reinforcing steel bar concrete side plates (2), wherein the side plates (2) are erected on the bottom plate (1) to form a strip-shaped trough plate member. The cavity member is characterized in that a strip-shaped trough of the strip-shaped trough plate member is filled with at least two light filling blocks (3), the bottom plate (1) at the bottoms of the side plates (2) is internally provided with at least one longitudinal through long prestressed steel (4), at least one longitudinal through long prestressed steel (4) is arranged at the tops of the side plates (2), the light filling blocks (3) are arranged at intervals, inner fin cavities (5) are formed among the filling blocks and orthogonal or heterotropic with the side plates (2), and notches (6) are arranged on the side plates (2) among the intervals of the light filling blocks (3) and provided with tying piers (7) of the side plates (2) for tying. The invention is suitable for hollow core slabs of cast-in-place reinforcing steel bar concrete or prestressed steel concrete, hollow floor systems, roofs, foundation bottom plates, wall bodies and open wed bridges.

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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