Hollow concrete slab

Abstract

A concrete hollow slab, comprising cast-in-place reinforced concrete (20), cavity members (21) for filling, the cavity members (21) for filling are arranged alternately and wrapped in cast-in-place reinforced concrete (20), and filled The cavity members (21) are cast-in-place concrete ribs (22) between each other, and it is characterized in that the lower tube wall (2) of the long tube body (1) is an integral whole long flat plate, and the long tube body ( 1) The other pipe wall has at least one transverse rib groove (3) perpendicular to or obliquely to the pipe axis, and at least one pipe wall between the transverse rib grooves (3) has a connecting piece (4). There are plugs (7) or inner sealing plates (6) or lightweight materials (5) at both ends of the long pipe body (1), on both sides of the transverse rib groove (3) or in the cavity of the long pipe body (1) At least one of them blocks the cavity in the long pipe body (1), and the cast-in-place reinforced concrete (20) forms a cast-in-place concrete inner rib (23) in the cavity of the transverse rib groove (3), and is combined with the cast-in-place concrete Ribs (22) are connected. Suitable for floors, roofs, walls, etc.

Description

(1) Technical field [0001] The invention relates to a hollow concrete slab. (2) Background technology [0002] At present, in the prior art, the cast-in-situ concrete hollow slab hole-forming components are permanent core molds, such as paper tubes, plastic tubes, metal corrugated tubes, core mold lightweight materials, etc. These tubular core molds or components mainly consider evacuated concrete, Reduce the weight of the hollow slab. For example, the applicant’s patent number 99249755.8 for the "fiber-reinforced thin-walled tube for in-situ reinforced concrete filling" is a utility model patent, which consists of a hard thin-walled pipe and two end plugs. The two ends of the tube are closed to form a closed cavity, and the cross section of the hard thin-walled tube and the shape of the plug can be round, square, trapezoidal or other special shapes. This kind of tube has the advantages of high strength, deformation resistance, good vibration resistance, and convenient constructi...

AI Technical Summary

Problems solved by technology

But after it is applied to the cast-in-place concrete hollow slab, since the tubular concrete in the center of the hard thin-walled tube in the cast-in-place concrete hollow slab has been evacuated, there are cast-in-place concrete ribs along the longitudinal direction of the tube, and in the transverse direction because the reinforced concrete has been It is evacuated by the mandrel or the component, and only the two plugs are used as the force transmission rib. Therefore, it cannot bear the complex tension, pressure, shear force, torque, etc., and there is a large difference in stiffness between the two directions of the cast-in-place concrete hollow slab. However, it becomes a cast-in-place reinforced concrete hollow one-way slab, which cannot form the equivalent two-way slab with well-shaped ribs.

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