CN211774960U

CN211774960U - Large-span superposed PCU (Power control Unit) cylindrical core concrete hollow slab

Info

Publication number: CN211774960U
Application number: CN201922374221.6U
Authority: CN
Inventors: 施林林
Original assignee: Changzhou Institute of Technology
Current assignee: Changzhou Institute of Technology
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-10-27
Anticipated expiration: 2029-12-26

Abstract

The utility model relates to a concrete structure design specifically is a large-span superimposed PCU section of thick bamboo core concrete hollow slab, including PCU section of thick bamboo core (1), cast-in-place layer (2) and prefabricated plate (3), PCU section of thick bamboo core (1) is hollow structure, establish on prefabricated plate (3) on cast-in-place layer (2), PCU section of thick bamboo core (1) is established between cast-in-place layer (2) and prefabricated plate (3), the both ends of PCU section of thick bamboo core (1) are equipped with closed end plate (11), PCU section of thick bamboo core (1) is located the volume on cast-in-place layer (2) and prefabricated plate (3) the same, solves in the integral floor structural design of assembly, and coincide floor thickness is great, and the structure dead weight increases, and the reinforcing bar volume increases in the floor, has increased the cost, and is difficult to control floor.

Description

Large-span superposed PCU (Power control Unit) cylindrical core concrete hollow slab

Technical Field

The utility model relates to a concrete structure design specifically is a large-span superimposed PCU section of thick bamboo core concrete hollow core board.

Background

The laminated slab is an assembled integral floor slab formed by laminating prefabricated slabs and cast-in-place reinforced concrete layers. The prefabricated slab below the laminated floor slab can replace a building template. And the lower surface is smooth, so that decoration of the decorative layer is facilitated. The composite floor slab has good integrity and can be used for high-rise buildings and large-bay buildings with higher requirement on integral rigidity. The composite floor slab has good integrity, the upper and lower surfaces of the slab are smooth, the decoration of a finish coat is convenient, and the composite floor slab is suitable for high-rise buildings and large-bay buildings with higher requirement on the integral rigidity.

However, the usual composite floor slabs today are made up of two separate layers of precast and cast-in-place reinforced concrete. Due to the requirements of transportation and hoisting, the current specifications require that the thickness of the precast slabs at the lower part is between 60mm and 80mm, but the thickness of the precast slabs is different according to the span of the floor slabs, but at least the thickness of the precast slabs is between 60mm and 80 mm. Typically the combined composite floor thickness will be between 130mm and 160 mm. The thickness of the floor is increased, the self weight of the structure is increased, the quantity of the steel bars in the floor is increased, the manufacturing cost is increased, and cracks are not easy to control.

In summary, one of the effective methods for reducing the dead weight of the structure is to optimize the form of the stressed cross section. For example, the essence of the prefabricated hollow slab is to reduce the concrete (i.e. the part with less stress) close to the neutral surface in the slab member, the basic principle of the prefabricated hollow slab is extremely similar to that of a T-shaped beam or an I-shaped beam, and as a result, the self weight of the structure can be well reduced, and the span of the slab is increased. For a solid slab with equal thickness, the hollow slab has less rigidity reduction and obvious dead weight reduction, and generally, the hollow rate of the hollow slab is between 20% and 50%; however, the existing composite slab structure only adopts hollow slabs at the precast slab part, and the cast-in-place concrete still adopts solid slabs, so that the reduction of the self weight of the structure is limited, and the obvious improvement of the stress performance and the reduction of the whole manufacturing cost cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to above-mentioned several problems, a large-span superimposed PCU section of thick bamboo core concrete hollow slab is proposed, solves in the integral floor structural design of assembly, and superimposed floor thickness is great, and the structure dead weight increases, and the reinforcing bar volume increases in the floor, has increased the cost, and is difficult to amount of deflection and the crack of control floor.

For solving the technical problem, the utility model discloses the technical scheme who adopts does: the utility model provides a large-span superimposed PCU section of thick bamboo core concrete hollow slab which characterized in that: the PCU cylindrical core is of a hollow structure, the PCU cylindrical core is arranged on the precast slab, the PCU cylindrical core is arranged between the cast-in-place layer and the precast slab, closed end plates are arranged at two ends of the PCU cylindrical core, and the PCU cylindrical core is located in the cast-in-place layer and has the same volume with the precast slab.

Preferably, the prefabricated plate also comprises plate bottom reinforcing steel bars, and the plate bottom reinforcing steel bars are arranged in the prefabricated plate and positioned at the lower part of the prefabricated plate.

Preferably, the prefabricated slab further comprises construction steel bars, and the construction steel bars are arranged at the bottom of the prefabricated slab.

Preferably, the prefabricated beam is arranged on the prefabricated beam, and the construction steel bars are connected with the prefabricated beam.

Preferably, the prefabricated beam further comprises a hidden beam, and the hidden beam is connected with the prefabricated beam.

The utility model discloses a large-span superimposed PCU section of thick bamboo core concrete hollow slab can fine lighten the dead weight of structure, has increased the span of board. For a solid slab with equal thickness, the hollow slab has less rigidity reduction and obvious dead weight reduction, and generally, the hollow rate of the hollow slab is between 20% and 50%; the rigidity of the hollow slab is also remarkably improved for the solid slab with equal concrete consumption.

Drawings

Fig. 1 is a schematic cross-sectional view of a large-span stacked PCU tube core concrete hollow slab of the present invention;

fig. 2 is a front view of the present invention, fig. 1 is a large-span stacked PCU cylinder core concrete hollow slab of the present invention.

Description of the drawings: 1. PCU cylinder core, 11, closed end plate, 2, cast-in-place layer, 3, precast slab, 4, slab bottom steel bar, 5, construction steel bar, 6, precast beam, 7 and hidden beam.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 and 2, a large-span superposed PCU cylindrical core concrete hollow slab comprises a PCU cylindrical core 1, a cast-in-place layer 2 and a precast slab 3, wherein the PCU cylindrical core 1 is of a hollow structure, the cast-in-place layer 2 is arranged on the precast slab 3, the PCU cylindrical core 1 is arranged between the cast-in-place layer 2 and the precast slab 3, closed end plates 11 are arranged at two ends of the PCU cylindrical core 1, and the volumes of the PCU cylindrical core 1 in the cast-in-place layer 2 and the precast slab 3 are the same; the prefabricated slab comprises a prefabricated slab 3 and is characterized by further comprising slab bottom steel bars 4, wherein the slab bottom steel bars 4 are arranged in the prefabricated slab 3 and positioned at the lower part of the prefabricated slab 3; the prefabricated slab further comprises construction steel bars 5, wherein the construction steel bars 5 are arranged at the bottom of the prefabricated slab 3; the prefabricated slab is characterized by further comprising a prefabricated beam 6, the prefabricated slab 3 is arranged on the prefabricated beam 6, and the construction steel bars 5 are connected with the prefabricated beam 6; the prefabricated beam structure further comprises a hidden beam 7, and the hidden beam 7 is connected with the prefabricated beam 6.

In specific implementation, when the reinforced concrete precast slab is poured in a factory, the PCU cylinder core is laid firstly, and two ends of the PUC pipe are blocked, so that concrete can not enter the hollow pipe. And (3) arranging the plate bottom steel bars and related structural steel bars (such as steel bar trusses and the like). The lower part of the prefabricated panel is smooth after completion, while the part of the cylindrical core of the upper PCU is protruded on the prefabricated panel.

After the precast slabs are installed in place, the peripheral precast beams are installed (or cast in situ), aiming at the structural characteristics of the large-span concrete composite slab. The plate has the characteristics of higher rigidity and smaller relative rigidity of the peripheral supporting beams, the columns are arranged under the peripheral precast beams to form a structural form that the precast beams support one plate at four sides, and the hidden beams are formed among the columns. And then, pouring concrete on the precast slabs to reach the specified strength, and then carrying out tensioning and anchoring.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a large-span superimposed PCU section of thick bamboo core concrete hollow slab which characterized in that: the PCU cylindrical core is characterized by comprising a PCU cylindrical core (1), a cast-in-place layer (2) and a precast slab (3), wherein the PCU cylindrical core (1) is of a hollow structure, the cast-in-place layer (2) is arranged on the precast slab (3), the PCU cylindrical core (1) is arranged between the cast-in-place layer (2) and the precast slab (3), closed end plates (11) are arranged at two ends of the PCU cylindrical core (1), and the PCU cylindrical core (1) is located in the cast-in-place layer (2) and has the same volume with the precast slab (3).

2. The large-span stacked PCU barrel core concrete hollow core slab as set forth in claim 1, characterized in that: the prefabricated slab is characterized by further comprising slab bottom steel bars (4), wherein the slab bottom steel bars (4) are arranged in the prefabricated slab (3) and located at the lower portion of the prefabricated slab (3).

3. The large-span stacked PCU barrel core concrete hollow core slab as set forth in claim 1, characterized in that: the prefabricated slab further comprises construction steel bars (5), and the construction steel bars (5) are arranged at the bottom of the prefabricated slab (3).

4. The large-span stacked PCU barrel core concrete hollow core slab as set forth in claim 3, characterized in that: the prefabricated plate structure is characterized by further comprising a prefabricated beam (6), the prefabricated plate (3) is arranged on the prefabricated beam (6), and the construction steel bars (5) are connected with the prefabricated beam (6).

5. The large-span stacked PCU barrel core concrete hollow core slab as claimed in claim 4, characterized in that: the prefabricated beam structure is characterized by further comprising a hidden beam (7), wherein the hidden beam (7) is connected with the prefabricated beam (6).