Prefabricated board unit for net rib board

Abstract

The invention relates to a prefabricated board unit for a net rib board. The prefabricated board unit is composed of three layers of boards, consisting of a top board (1), a sandwich layer (2) and a bottom board (3). The sandwich layer (2) is arranged between the top board (1) and the bottom board (3). The prefabricated board unit is characterized in that the top board (1) and the bottom board (3) are reinforced concrete structural bearing boards; reinforcing bars (4) in the top board (1) and the bottom board (3) are arranged in a net manner; the reinforcing bars (4) extend out of the end face of the top board (1) or / and the bottom board (3) so as to form connection rib reinforcing bars (4); the sandwich layer (2) is a hollow layer made of a light material; an inwardly concave structure (5) or an outwardly convex structure (6) is arranged on the end face of the top board (1) or / and the bottom board (3); the prefabricated board unit for the net rib board is applied to a cast-in-place prefabricated net rib board; in addition, after being used as the independent part of a bidirectional net rib board, the prefabricated board unit for the net rib board has the advantages of good integrity, strong water leakage resistance capacity and good integral pressure resistance.

Description

technical field [0001] The invention relates to the field of prefabricated components for combined concrete panels, in particular to a prefabricated panel unit for mesh rib panels. Background technique [0002] At present, the traditional floor structure generally adopts prefabricated slabs to be placed on beams or walls. This kind of prefabricated structure floor is a one-way slab, which can only bear force in one direction and has a low load capacity. When receiving natural disasters such as earthquakes, the plates are easily loosened, resulting in cracks or plate breaks, weak earthquake resistance, and low safety performance. For this reason, another cast-in-place concrete hollow slab technology is adopted Prefabricated hollow components are buried in the concrete structural slab to form a cast-in-place concrete hollow slab. This cast-in-place concrete hollow slab has good structural strength and structural safety performance. However, because a large number of formwork i...

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional floor structure generally adopts prefabricated slabs to be placed on beams or walls. This kind of prefabricated structure floor is a one-way slab, which can only bear force in one direction and has a low load capacity. When receiving natural disasters such as earthquakes, the plates are easily loosened, resulting in cracks or plate breaks, weak earthquake resistance, and low safety performance. For this reason, another cast-in-place concrete hollow slab technology is adopted Prefabricated hollow components are buried in the concrete structural slab to form a cast-in-place concrete hollow slab. This cast-in-place concrete hollow slab has good structural strength and structural safety performance. However, because a large number of formwork is required in the construction process, a large amount of wood is consumed , bamboo and other non-renewable resources or high-energy-consuming materials such as steel plate formwork, and the construction process is complex, the internal prefabricated hollow components are difficult to locate, and the cast-in-place concrete at the lower part of the prefabricated components is not poured in place, resulting in quality problems such as honeycomb pockmarks or hollows. For example, the name is: new combined concrete composite box, and the patent number is ZL200520084212.9 utility model patent. This technology solves some problems, but new problems also appear. After the top box and bottom box are connected with cast-in-place concrete The formed joint interface is very easy to crack, which easily leads to structural damage. Moreover, in the process of construction and application, the weight of the top box and the bottom box is relatively large. After the construction load is added, the side frame plate is easily crushed, resulting in cast-in-place concrete. It flows into the cavity formed by the side frame plate; after the side frame plate is combined with the top box or bottom box, there is often a gap between them. During the pouring of cast-in-place concrete, water and cement slurry easily penetrate into the cavity surrounded by the side frame plate In this process, it is easy to cause the concrete to reduce its strength due to the loss of cement paste, which will affect the structural safety. Therefore, it is urgent to develop a prefabricated panel unit for mesh ribs.

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