Cavity member for hollow concrete slabs

Abstract

The invention relates to a cavity member for hollow concrete slabs, which comprises a reinforced concrete bottom slab (1) and at least two reinforced concrete side slabs (2), and the side slabs (2) are erected on the bottom slab (1) to form an elongated slot slab member, wherein at least two light filling blocks (3) are filled in the elongated slot of the elongated slot slab member, at least one longitudinal through-length prestressed reinforcement (4) is arranged in the bottom slab (1) at the bottoms of the side slabs (2), and at least one longitudinal through-length prestressed reinforcement (4) is arranged on the tops of the side slabs (2); the light filling blocks (3) are arranged at intervals, an inner ribbed cavity (5) is arranged between every two adjacent light filling blocks (3),and the inner ribbed cavities (5) and the side slabs (2) are orthogonal or heterotropic; a notch (6) is arranged on the side slab (2) in an interval between every two light filling blocks (3), and a tying pier (7) of each side slab (2) is arranged on the notch (6) for tying. The cavity member is applicable to hollow slabs, hollow floor systems, roofs, foundation bottom slabs, walls and hollow bridges, of cast-in-place reinforced concrete or prestresssed 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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