Hollow concrete slab

Abstract

A hollow reinforced concrete comprises concrete cast in site, hollow components as fillers spaced each other and contained in the former. Some tubular bodies have low walls forming a whole plate. Some lateral tunnels are equipped with the side walls of the tubular bodies, perpendicularly or tilted, between which some connection elements are arranged. At least two tubular holes are located in the longitudinal tubular bodies. Some lightweight materials are filled in the tubular bodies with sealed elements at the both ends of the tubular bodies or the both sides of the tubular bodies or inside of the tubular bodies. The concrete can be used as hollow roof.

Description

(1) Technical field [0001] The invention relates to a concrete hollow slab. (2) Background technology [0002] At present, in the existing technology, the hole-forming components of cast-in-place concrete hollow slabs are permanent mandrels, such as paper tubes, plastic tubes, metal bellows, and lightweight materials for mandrels. These tubular mandrels or components are mainly considered to evacuate concrete. Reduce the weight of hollow-core panels. For example, the patent No. 99249755.8 applied by the applicant is a utility model patent for "fiber-reinforced thin-walled tube for filling cast-in-place reinforced concrete". It consists of a hard thin-walled tube and plugs at both ends. Both 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 pipe has the advantages of high strength, anti-deformation, good anti-vibration perfo...

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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