JP2002188236A - Embedded material for concrete slab, precast concrete slab and void concrete slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an embedded material for a concrete slab, a precast con crete slab and a void concrete slab, capable of preventing a drum phenomenon wherein an upper and lower shells produce resonance. SOLUTION: The embedded material 1 for the concrete slab is constituted by making plural split pieces 2 joined by a coupling body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an embedding material for a concrete slab, a precast concrete plate and a hollow concrete slab.

[0002]

2. Description of the Related Art As shown in FIGS. 9A and 9B, a hollow concrete slab is made of a precast concrete plate 2 on which an embedding material 28 for a concrete slab is disposed.
9, a top concrete 30 is cast and constructed. The hollow concrete slab 31 is light and has the same heavy floor impact sound performance as a slab without the concrete slab embedding material 28 disposed therein.

[0003]

However, the hollow concrete slab 31 is composed of an upper concrete (hereinafter, referred to as an upper shell) 33 and a lower concrete (hereinafter, referred to as a lower shell) 34 in a hollow portion 32 of the embedding material 28 for the concrete slab. Causes a resonance phenomenon, that is, a so-called drum phenomenon, so that there is a problem that the lightweight floor impact sound performance is remarkably reduced particularly in a frequency band around 1 KHZ.

The present invention has been made in view of these problems, and an object thereof is to provide an embedding material for a concrete slab, a precast concrete plate, and a hollow member capable of preventing a drum phenomenon in which an upper shell and a lower shell resonate. It is to provide concrete slabs.

[0005]

Means for solving the above problems are characterized in that the embedding material for concrete slab according to the first aspect of the present invention is formed by joining a plurality of divided pieces with a connecting body. The embedding material for concrete slab of the invention according to claim 2 is characterized in that, in claim 1, the divided piece is formed by being divided along the short side, the long side or the short side and the long side, The embedding material for concrete slabs according to the third aspect of the present invention is characterized in that, in the first or second aspect, the divided pieces penetrate vertically, and the embedding material for the concrete slab according to the fourth aspect of the invention. The precast concrete according to any one of claims 1 to 3, wherein the connecting member has a rhombic cross section, a circular cross section, an elliptical cross section, a triangular cross section, a rectangular cross section, or a trapezoidal cross section. Claim 1 A concrete concrete board is provided with at least one or more of the concrete slab embedding materials according to claim 4. The hollow concrete slab according to claim 6 is a precast concrete board according to claim 5. At least one of them is laid between beams to form a lower floor, and top concrete is cast on the lower floor.

[0006] An embedding material for a concrete slab that enhances the performance of a lightweight floor impact sound can be formed. A through groove into which top concrete is cast is formed between the divided pieces connected by the connecting body. Since the connecting body has a rhombic cross section, a circular cross section, a rectangular cross section, and a trapezoidal cross section, top concrete can be easily cast between the connecting pieces. Since top concrete is cast between the divided pieces connected by the connecting body and the upper shell and the lower shell are joined, these resonance phenomena, that is, the drum phenomenon, can be prevented.
When the top concrete is poured between the divided pieces connected by the connecting member, the concrete slab embedding material is divided into a plurality of pieces and installed in the hollow concrete slab. It is possible to provide a precast concrete plate and a hollow concrete slab which prevent a drum phenomenon and enhance a lightweight floor impact sound performance.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an embedding material for concrete slab (hereinafter referred to as embedding material), a precast concrete plate (hereinafter referred to as PC board) and a hollow concrete slab (hereinafter referred to as slab) of the present invention will be described below. It will be described based on. First, the embedding material will be described, and then embodiments of PC boards and slabs using the embedding material will be described. In each embodiment, the same components are denoted by the same reference numerals, and different configurations are described. Will be described with different reference numerals.

FIG. 1 shows an embedding material 1 according to the first embodiment. The embedding material 1 is a foam such as a polystyrene-based resin or a polyolefin-based resin, and is configured such that five divided pieces 2 are joined to each other by a connecting body 3 at the center. The connecting body 3 is formed to have a rhombic cross section so that top concrete can be easily poured between the connecting pieces and below the connecting body. Therefore, the embedding material 1 is as if it were one, and a plurality of divided embedding materials can be installed on the precast concrete plate.
Also, as shown in (5) of FIG.
And the weight of the entire embedding material 1 can be reduced.

FIG. 2 shows an embedding material 5 according to a second embodiment. The embedding material 5 is configured by connecting the divided pieces 2 with two connecting bodies 3, and has the same configuration as the embedding material 1 except for this. This embedding material 5 has a through hole 6 penetrating vertically in the center of the divided pieces 2.

FIG. 3 shows an embedding material 7 according to a third embodiment. The embedding material 7 is obtained by forming the connecting body 3 into a circular cross section, and has the same configuration as that of the embedding material 1 except for this. In the embedding material 8 of (3), similarly to the embedding material 5 described above, the divided pieces are connected by two connecting bodies 3 having circular cross sections.

Although the above-mentioned divided pieces 2 are divided into five pieces, that is, one embedding material is divided into five pieces, the number of divided pieces may be more or less.

FIG. 4 shows an embedding material 9 according to a fourth embodiment. These embedding materials 9 are obtained by connecting four divided pieces 2, that is, the divided pieces 2 divided along the long side and the short side by a connecting body 3 having a rhombic cross section. This embedding material 9 is also formed by dividing one embedding material into four. However, the number of divisions may be more or less than this, and the above-mentioned divided piece 2 may have a hollow portion as shown in FIG. 4 can also be provided.

In addition, instead of being divided into four parts as described above, it is also possible to form an embedding material in which the divided pieces 2 divided into two along the long side are connected by a connecting body 3 having a rhombic cross section. In this case, it is assumed that the divided pieces 2 are connected by at least one or more connected bodies.

The connecting members 3 in the embedding members 1, 5, 7, 8, and 9 are not limited to a rhombic cross section or a circular cross section, but may be an elliptical cross section, a triangular cross section, a rectangular cross section, or a trapezoidal cross section. .

Next, an embodiment of a PC board using the above-described embedding material will be described. In this embodiment, the same components as those of the above-described embodiment are denoted by the same reference numerals and described, and different components will be described. The configuration will be described with different reference numerals.

FIG. 5 shows an embodiment of the PC board 10. The PC board 10 is embedded between truss bars 12 arranged at appropriate intervals along the long side of the concrete board 11. 1 is installed and configured. This truss bar 12
Is formed by joining one upper chordal bar 13 and two lower chordal bars 14 arranged in a triangular shape with a corrugated lattice bar 15, and the lower chord bar 14 is a bending reinforcement bar 16 of the concrete plate 11.
Is joined to. This embedding material 1 has a divided piece 2
As a result, the embedding material divided into five parts is provided on the concrete plate 11, and a through groove 17 penetrating vertically is formed between the divided pieces 2. . Further, since the connecting body 3 has a rhombic cross section, top concrete is easily poured into the through groove 17 and the lower side of the connecting body.

In addition to the above-mentioned PC board 10, second to fourth
Or a PC board using at least two or more of the first to fourth embedding materials 5, 7, 8, 9 can be formed.

Next, an embodiment of a slab using the above-described PC board will be described. In this embodiment, the same components as those described above are denoted by the same reference numerals, and different components are denoted by different reference numerals. A description is given below.

FIGS. 6 to 8 show an embodiment of the slab 18. In the slab 18, the PC board 10 is laid between the long beam 19 and the short beam 20, and the lower floor 21 is formed. It is formed by arranging the upper slab reinforcement 22 and casting the top concrete 23. The top concrete 23 is cast in the through groove 17 between the divided pieces to form a joint 26 connecting the upper shell 24 and the lower shell 25. Since the joining portion 26 is formed between the divided pieces so as to cover the connecting body 3, it is as if the embedding material was divided into five and disposed in the slab 18. That is, as shown in FIG. 8, the upper shell 24 and the lower shell 25 are connected by a joint 26 formed between the divided pieces. Therefore,
Since the upper shell 24 and the lower shell 25 are integrally formed at the joint 26 to increase rigidity, it is possible to prevent the drum phenomenon in which these resonate.

In addition to the slab 18, the second to fourth
A slab using a PC board using the embedding materials 5, 7, 8, 9 of the above or a PC board combining at least two or more of the first to fourth embedding materials 1, 5, 7, 8, 9 is used. Can also be built.

[0021]

According to the present invention, it is possible to form an embedding material that enhances the performance of a lightweight floor impact sound.

A through groove into which top concrete is cast is formed between the divided pieces connected by the connecting member.

Since the connecting body has a rhombic cross section, a circular cross section, an oval cross section, a triangular cross section, a rectangular cross section, and a trapezoidal cross section, top concrete can be easily cast between the connecting pieces.

Since the upper shell and the lower shell are joined between the divided pieces connected by the connecting body and the upper shell and the lower shell are joined, it is possible to prevent a drum phenomenon in which these resonate.

When the top concrete is poured between the divided pieces connected by the connecting member, the embedding material is divided and installed as in a hollow concrete slab.

The present invention can provide a precast concrete plate and a hollow concrete slab which prevent the drum phenomenon and enhance the light floor impact sound performance.

[0027] The through groove between the divided pieces can be made into a water channel for drainage.

[Brief description of the drawings]

FIG. 1 shows an embedding material according to a first embodiment, wherein (1) is a plan view, (2) is a side view, (3) is a cross-sectional view taken along the line AA of (1), and (4) is FIG. 5B is a cross-sectional view of the same BB line, and FIG. 5B is a cross-sectional view of another embedding material.

FIG. 2 is an embedding material according to a second embodiment, wherein (1) is a plan view, (2) is a cross-sectional view taken along line CC of (1), and (3) is a cross-sectional view of the same.
FIG. 4 is a sectional view taken along line D.

FIG. 3 is an embedding material according to a third embodiment, (1) is a plan view, (2) is a cross-sectional view taken along line EE of (1), and (3) is a cross section of another embedding material. FIG.

FIG. 4 is an embedding material according to a fourth embodiment, wherein (1) is a plan view, (2) is a cross-sectional view taken along line FF of (1), and (3) is G
It is a G line sectional view.

5 (1) is a plan view of a PC board, and FIG. 5 (2) is H of FIG.
FIG. 3 is a cross-sectional view taken along the line H, and FIG. 3C is a cross-sectional view taken along the line II.

FIG. 6 is a partially cutaway plan view of a slab.

FIG. 7 is a cross-sectional view of a slab.

FIG. 8 is a cross-sectional view of a joint showing a joint between an upper shell and a lower shell of the slab.

9A is a sectional view of a conventional slab, and FIG. 9B is a partially cutaway sectional view of the conventional slab.

[Explanation of symbols]

 Reference Signs List 1, 5, 7, 8, 9, 28 Embedding material 2 Split piece 3 Connecting body 4, 32 Hollow part 6 Through hole 10, 29 PC board 11 Concrete board 12 Truss bar 13 Upper chord bar 14 Lower chord bar 15 Lattice bar 16 Bending Reinforcing bars 17 Through grooves 18, 31 Slabs 19 Long beams 20 Short beams 21 Lower floor 22 Upper slab reinforcement 23, 30 Top concrete 24, 33 Upper shell 25, 34 Lower shell 26 Joint

Claims (6)

[Claims] 1. An embedding material for a concrete slab, wherein a plurality of divided pieces are joined by a connecting body. 2. The embedding material for a concrete slab according to claim 1, wherein the divided piece is formed by being divided along the short side, the long side, or the short side and the long side. 3. The concrete slab embedding material according to claim 1, wherein the divided pieces penetrate vertically. 4. The embedding material for concrete slab according to claim 1, wherein the connecting body has a rhombic cross section, a circular cross section, an elliptical cross section, a triangular cross section, a rectangular cross section, and a trapezoidal cross section. . 5. A precast concrete plate, wherein at least one or more of the concrete slab embedding materials according to claim 1 is installed on a concrete plate. 6. A lower floor is formed by laying at least one or more of the precast concrete plates according to claim 5 between beams so as to form a lower floor, and top concrete is cast on the lower floor. And hollow concrete slab.