CN111663696A - Formwork-free self-bearing prefabricated rib beam concrete hollow laminated slab - Google Patents

Abstract

The invention discloses a formwork-free self-supporting prefabricated rib beam concrete hollow composite board, which comprises a prefabricated cement fiber board and a plurality of prefabricated rib beams arranged at intervals along the width of the floor slab and extending longitudinally along the floor slab. A hollow body is arranged between the rib beams, the hollow body is fixed on the prefabricated cement fiber board with anchors, and the prefabricated rib beam is fixed with the prefabricated cement fiber board through a connecting plate fixed at the bottom thereof. A concrete body is cast on the prefabricated cement fiber board, and the hollow body and the prefabricated rib beam are embedded in the concrete body. The floor slab of the invention has high rigidity and light weight, can reduce secondary beams, increase the clearance of the building, and has a beautiful appearance. Test research and engineering practice have proved that the working performance of the laminated slab of the present invention is exactly the same as that of the integral cast-in-place concrete slab, and can be used as a two-way slab.

Description

A formwork-free self-supporting prefabricated rib beam concrete hollow composite slab

technical field

The invention relates to a building structure, in particular to a formwork-free self-supporting prefabricated rib beam concrete hollow composite board.

Background technique

With the development of prefabricated buildings, prefabricated buildings such as steel structures and precast concrete have developed rapidly. Floor slab is an important part of building structure and occupies a large proportion in buildings. The middle of the floor slab is generally suspended, so the stiffness is small, especially for large-span structures, the middle of the floor slab is prone to large deflections and cracks. The cast-in-place floor slab needs to support the formwork according to the design position at the construction site, bind the steel bars, and then pour the concrete. It has the characteristics of good structural integrity and rigidity, and is suitable for buildings with irregular shapes or room sizes that do not meet the modulus requirements. The process is cumbersome, requires a lot of formwork, the thickness of the floor is too large, and it is self-important; the cast-in-place concrete needs to be maintained, the construction period is long, the noise and dust pollution are serious, and the energy such as water and electricity is wasted, which is not conducive to sustainable development and ecological civilization construction. The prefabricated floor slab can realize assembly line operations, facilitate industrialization and mechanized construction, shorten the construction period, effectively save labor, achieve energy conservation and emission reduction, reduce energy consumption during construction, and be conducive to sustainable development. important position in development.

SUMMARY OF THE INVENTION

In order to solve the technical problems existing in the known technology, the present invention provides a formwork-free self-supporting prefabricated rib beam concrete hollow composite board with light weight, convenient construction and convenient decoration and decoration.

The technical scheme adopted by the present invention to solve the technical problems existing in the known technology is as follows: a formwork-free self-supporting prefabricated rib beam concrete hollow composite board, comprising a prefabricated cement fiber board and a plurality of slabs arranged at intervals along the lateral direction of the floor slab and extending longitudinally along the floor slab The prefabricated rib beam, a hollow body is arranged between the two adjacent prefabricated rib beams, the hollow body is fixed on the prefabricated cement fiber board with anchors, and the prefabricated rib beam is fixed on the bottom of the prefabricated rib beam through the The connecting plate is fixedly connected with the prefabricated cement fiber board, a concrete body is poured on the prefabricated cement fiber board, and the hollow body and the prefabricated rib beam are embedded in the concrete body.

The hollow body is made of lightweight material.

The prefabricated rib beam is made of reinforced truss or light section steel, and the light section steel is any one of channel steel, H section steel, U section steel and square pass.

A plurality of laterally penetrating concrete flow holes are arranged on the light-weight section steel.

The prefabricated cement fiber board is provided with double-layer bidirectional reinforcement.

The connecting plate and the prefabricated cement fiber board are connected by self-tapping screws.

The advantages and positive effects of the invention are: in the construction stage, the prefabricated rib beams bear the construction load, and the prefabricated cement fiber board can be used as a formwork for pouring concrete, which can achieve zero formwork use, and can save a lot of formwork rental fees, dismantling the formwork and transporting the formwork backwards. Cost, save the cost and time of installing full-scale scaffolding, greatly shorten the construction period, and reduce the project cost; after the concrete pouring is completed, the prefabricated rib beam and hollow body, as well as the prefabricated cement fiber board and the concrete entity are superimposed as a whole, and the prefabricated rib beam is subjected to common force. It plays the role of steel bars in traditional reinforced concrete components, and the composite board can be equipped with no or less steel bars, which can greatly reduce the work of on-site steel bar binding and connection; the hollow body can greatly reduce the weight of the composite board; The combination of decoration materials is better than that of galvanized steel plate, which is convenient for decoration and decoration without dismantling. To sum up, the floor slab of the present invention has high rigidity and light weight, can reduce secondary beams, increase the clearance of the building, and has a beautiful appearance. Test research and engineering practice have proved that the working performance of the laminated slab of the present invention is exactly the same as that of the integral cast-in-place concrete slab, and can be used as a two-way slab. At the same time, the invention has simple structure and convenient construction, can reduce the energy consumption and environmental pollution of the construction site, can improve the construction efficiency, and greatly shorten the construction period.

Description of drawings

1 is a schematic perspective view of the structure of Embodiment 1 of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a longitudinal section partial view of Fig. 1;

Fig. 4 is a cross-sectional partial view of Fig. 1;

5 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 6 is the top view of Fig. 5;

Fig. 7 is a partial view in longitudinal section of Fig. 5;

FIG. 8 is a partial cross-sectional view of FIG. 5 .

In the picture: 1. Steel truss; 2. Prefabricated cement fiber board; 3. Connecting plate; 4. Hollow body; 5. Self-tapping screw; 6. Concrete solid; 7. Anchor; 8. Light channel steel; 9. Concrete passing orifice.

Detailed ways

In order to further understand the content of the invention, features and effects of the present invention, the following embodiments are exemplified and described in detail with the accompanying drawings as follows:

Please refer to Figures 1 to 8, a formwork-free self-supporting prefabricated rib beam concrete hollow composite panel, comprising a prefabricated cement fiber board 2 and a plurality of prefabricated rib beams arranged at intervals along the lateral direction of the floor slab and extending longitudinally along the floor slab. A hollow body 4 is arranged between the two prefabricated rib beams. The hollow body 4 is fixed on the prefabricated cement fiber board 2 by using anchors 7. The prefabricated cement fiber board 2 is fixedly connected, a concrete body 6 is poured on the prefabricated cement fiber board 2 , and the hollow body 4 and the prefabricated rib beam are embedded in the concrete body 6 .

In Embodiment 1, the prefabricated rib beam is made of steel truss 1 . In Embodiment 2, the prefabricated rib beam is made of light channel steel 8, but the present invention does not limit the prefabricated rib beam to be made of light channel steel 8, and H-beam, U-beam and square beam can also be used. Any kind of light-duty steel.

In Embodiment 1 and Embodiment 2, the hollow body 4 is made of light-weight material, which can further reduce the weight of the laminated board.

In Embodiment 2, a plurality of laterally penetrating concrete flow holes 9 are provided on the light-weight section steel, so as to facilitate the overall pouring of the concrete body 6 . The prefabricated cement fiber board 2 is provided with double-layer bidirectional reinforcement, which can be used in the case of large load bearing or large span. The connecting plate 3 and the prefabricated cement fiber board 2 are connected by self-tapping screws 5, which is convenient for construction and reliable in connection.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. Under the inspiration of the present invention, personnel can also make many forms without departing from the scope of the present invention and the protection scope of the claims, which all belong to the protection scope of the present invention.

Claims (7)

1. The hollow composite slab is characterized by comprising a prefabricated cement fiber board and a plurality of prefabricated rib beams which are arranged at intervals along the transverse direction of a floor slab and extend along the longitudinal direction of the floor slab, wherein a hollow body is arranged between every two adjacent prefabricated rib beams and fixed on the prefabricated cement fiber board by adopting an anchor, the prefabricated rib beams are fixedly connected with the prefabricated cement fiber board through a connecting plate fixed at the bottom of the prefabricated rib beams, a concrete entity is poured on the prefabricated cement fiber board, and the hollow body and the prefabricated rib beams are buried in the concrete entity.

2. The formwork-free self-bearing prefabricated rib beam concrete hollow composite slab as claimed in claim 1, wherein the prefabricated rib beam is made of steel bar trusses.

3. The formwork-free self-bearing precast rib beam concrete hollow composite slab of claim 1, wherein the hollow body is made of lightweight material.

4. The formwork-free self-bearing precast rib beam concrete hollow composite slab of claim 1, wherein the precast rib beam is made of light section steel, and the light section steel is any one of channel steel, H section steel, U section steel and square tube.

5. The formwork-free self-bearing precast rib beam concrete hollow composite slab as claimed in claim 4, wherein a plurality of concrete overflowing holes are formed in the light section steel in a lateral direction.

6. The formwork-free self-bearing precast rib beam concrete hollow composite slab as claimed in claim 1, wherein a double-layer bidirectional reinforcement is provided on the precast cement fiberboard.

7. The formwork-free self-bearing precast rib beam concrete hollow composite slab as claimed in claim 1, wherein the connecting plate and the precast cement fiberboard are connected by self-tapping screws.

Images