JP3701196B2 - Concrete slab embedding material, precast concrete board and hollow concrete slab - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete slab embedding material, a precast concrete board, and a hollow concrete slab.
[0002]
[Prior art]
As shown in FIGS. 9 (1) and (2), the hollow concrete slab is constructed by placing a top concrete 30 on a precast concrete plate 29 provided with an embedding material 28 for concrete slab. The hollow concrete slab 31 is light and has a heavy floor impact sound performance comparable to that of a slab in which the concrete slab embedding material 28 is not disposed.
[0003]
[Problems to be solved by the invention]
However, in the hollow concrete slab 31 described above, the upper concrete (hereinafter referred to as the upper shell) 33 and the lower concrete (hereinafter referred to as the lower shell) 34 in the hollow portion 32 of the concrete slab embedding material 28 exhibit a resonance phenomenon, a so-called taiko phenomenon. Therefore, there is a problem that the light floor impact sound performance is remarkably deteriorated particularly in a frequency band around 1 KHZ.
[0004]
The present invention has been made in view of these problems, and an object of the present invention is to provide a concrete slab embedding material, a precast concrete plate, and a hollow concrete slab capable of preventing a drum phenomenon in which an upper shell and a lower shell resonate. Is to provide.
[0005]
[Means for Solving the Problems]
Means for solving the above problem is that the invention of claim 1 is arranged such that four divided pieces are arranged in the front, rear, left and right so as to form a planar cross-shaped through-hole penetrating vertically, and these divided pieces are diamond-shaped in cross section. characterized by a kite joined at one of the coupling body of circular cross section or an oval cross section. Further, in the invention of claim 2, four divided pieces are arranged in the front, rear, left and right so as to form a planar cross-shaped through-hole penetrating vertically, and these divided pieces are any one of a rhombus cross section, a cross section circle or a cross section ellipse. the concrete slab embedding material joined by a connecting body, is characterized by being placed on the upper surface of the concrete plate. Further, in the invention of claim 3, four divided pieces are arranged in the front, rear, left and right so as to form a planar cross-shaped through-hole penetrating vertically, and these divided pieces are either a cross-sectional rhombus, a circular cross-section or an elliptical cross-section. the concrete slab embedding material joined by a connecting member, installed on the top surface of the concrete plate forming a precast concrete plate, to form the lower floor laying the precast concrete plate adjacent state Harima, A top concrete is cast on the lower floor.
[0006]
It is possible to form a concrete slab embedding material that enhances lightweight floor impact sound performance. A through groove into which the top concrete is placed is formed between the divided pieces connected by the coupling body. Since the connecting body has a diamond-shaped cross section, a circular cross section, a rectangular cross section, and a trapezoidal cross section, the top concrete can be easily placed between the connecting pieces. Since the top concrete is placed between the divided pieces connected by the coupling 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 placed between the divided pieces connected by the connecting body, the concrete slab embedding material is divided into a plurality of parts and installed in the hollow concrete slab. It is possible to provide a precast concrete board and a hollow concrete slab that prevent the drum phenomenon and improve the lightweight floor impact sound performance.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a concrete slab embedding material (hereinafter referred to as an embedding material), a precast concrete plate (hereinafter referred to as a PC plate) and a hollow concrete slab (hereinafter referred to as a slab) according to the present invention will be described below with reference to the drawings. First, after describing the embedding material, embodiments of the PC board and slab using this embedding material will be described. In each embodiment, the same components are described with the same reference numerals, and different configurations are described. Are described with different reference numerals.
[0008]
FIG. 1 shows an embedding material 1 according to a first embodiment. The embedding material 1 is a foamed material such as a polystyrene-based resin or a polyolefin-based resin, and is composed of five divided pieces 2 joined together by a connecting body 3 at the center. The connecting body 3 is formed in a rhombus shape so that top concrete can be easily placed between connecting pieces and below the connecting body. Therefore, the embedding material 1 is as if it is one, and a plurality of divided embedding materials can be installed on the precast concrete board. Moreover, as shown to (5) of the figure, the hollow part 4 can be provided in the division piece 2, and the whole embedding material 1 can also be reduced in weight.
[0009]
FIG. 2 shows the embedding material 5 of the second embodiment. The embedding material 5 is configured by connecting the divided pieces 2 with two connecting bodies 3, and the other configuration is the same as that of the embedding material 1. The embedding material 5 has a through-hole 6 penetrating vertically in the center between the split pieces 2.
[0010]
FIG. 3 shows the embedding material 7 of the third embodiment. This embedding material 7 is obtained by making the connecting body 3 into a circular cross section, and the other configuration is the same as the embedding material 1. Further, the embedded material 8 of (3) is obtained by connecting the divided pieces with two connecting bodies 3 having a circular cross section, like the embedded material 5 described above.
[0011]
In addition, although the said divided piece 2 is five pieces, ie, one embedding material is divided into five, the division | segmentation number beyond this or less may be sufficient.
[0012]
FIG. 4 shows an embedding material 9 according to the fourth embodiment. These embedding materials 9 include four divided pieces 2, that is, a connecting body having a rhombus cross section in which four divided pieces 2 are arranged in the front, rear, left, and right directions so as to form a planar cross-shaped through hole 6 penetrating vertically. 3 is connected. Although this embedding material 9 is also divided into four embedding materials, the number of divisions may be more or less than this, and a hollow portion as shown in FIG. 4 can also be provided.
[0013]
Moreover, the embedding material by which the division piece 2 divided into 2 along the long side was connected by the coupling body 3 of a rhombus cross section instead of dividing into 4 as mentioned above can also be formed. In this case, it is assumed that the divided pieces 2 are connected by at least one connecting body.
[0014]
In addition, the connecting body 3 in the above-described embedding materials 1, 5, 7, 8, and 9 is not limited to a rhombus cross section or a cross section circle, but may be an oval cross section, a cross section triangle, a cross section square, or a cross section trapezoid.
[0015]
Next, an embodiment of a PC board using the above-described embedding material will be described. In this embodiment, the same configuration as the above-described embodiment is described with the same reference numeral, and different configurations are different. A description will be given with reference numerals.
[0016]
FIG. 5 shows an embodiment of the PC board 10, and the PC board 10 has the embedded material 1 installed between the truss bars 12 arranged at appropriate intervals along the long side of the concrete board 11. Has been configured. In this truss bar 12, one upper chord 13 and two lower chords 14 arranged in a triangular shape are joined by a corrugated lattice 15, and the lower chord 14 is bent to reinforce the concrete plate 11. It is joined to the muscle 16. Since this embedded material 1 has divided pieces 2 connected by a connecting body 3, it is as if the embedded material divided into five parts is installed on the concrete plate 11, and between the divided pieces 2. A through groove 17 penetrating vertically is formed. Moreover, since the connection body 3 has a rhombus cross section, the top concrete is easily placed on the through groove 17 or the lower side of the connection body.
[0017]
In addition to the above-described PC plate 10, a PC plate using the second to fourth embedded materials 5, 7, 8, 9 or the first to fourth embedded materials 5, 7, 8, 9 is used. It is also possible to form a PC plate using at least two kinds.
[0018]
Next, an embodiment of a slab using the above-mentioned PC board will be described. In this embodiment, the same components as those described above are described with the same reference numerals, and different configurations are labeled with different reference numerals. explain.
[0019]
6 to 8 show an embodiment of a slab 18, in which a PC plate 10 is laid between a long beam 19 and a short beam 20 to form a lower floor 21, in which a slab upper end muscle is formed. 22 is arranged and top concrete 23 is cast and formed. This top concrete 23 is driven into the through-groove 17 between the divided pieces to form a joint portion 26 that connects the upper shell 24 and the lower shell 25. Since the joint portion 26 is formed between the divided pieces so as to cover the connecting body 3, it is as if the embedded material is divided into five parts 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 portion 26 formed between the divided pieces. Therefore, the upper shell 24 and the lower shell 25 are integrated with each other at the joint portion 26 to increase the rigidity, so that the drum phenomenon in which they resonate can be prevented.
[0020]
In addition to the slab 18 described above, a PC plate using the second to fourth embedded materials 5, 7, 8, 9 or the first to fourth embedded materials 1, 5, 7, 8, 9 It is also possible to construct a slab using a PC board in which at least two kinds are combined.
[0021]
【The invention's effect】
It is possible to form an embedding material that enhances lightweight floor impact sound performance.
[0022]
A through groove in which the top concrete is placed is formed between the divided pieces connected by the coupling body.
[0023]
Since the connecting body has a diamond-shaped cross section, a circular cross section, an elliptical cross section, a triangular cross section, a square cross section, and a trapezoidal cross section, the top concrete can be easily placed between the connecting pieces.
[0024]
Since the top concrete is placed between the divided pieces connected by the connecting body and the upper shell and the lower shell are joined, the drum phenomenon in which these resonate can be prevented.
[0025]
When the top concrete is placed between the divided pieces connected by the connecting body, the embedded material is divided and installed in the hollow concrete slab.
[0026]
It is possible to provide a precast concrete board and a hollow concrete slab that prevent the drum phenomenon and enhance the lightweight floor impact sound performance.
[0027]
The through groove between the divided pieces can be used as a drainage water channel.
[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 sectional view taken along line AA in (1), and (4) is Sectional view along the line B-B, (5) is a 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 the line CC of (1), and (3) is a cross-sectional view taken along the line DD. It is.
FIGS. 3A and 3B show an embedding material according to a third embodiment, wherein FIG. 3A is a plan view, FIG. 3B is a cross-sectional view taken along line EE in FIG. FIG.
FIGS. 4A and 4B show an embedding material according to a fourth embodiment, wherein FIG. 4A is a plan view, FIG. 4B is a cross-sectional view taken along line FF in FIG. It is.
5A is a plan view of a PC board, FIG. 5B is a cross-sectional view taken along the line HH of FIG. 1A, and FIG. 5C is a cross-sectional view taken along the line II of FIG.
FIG. 6 is a partially cutaway plan view of a slab.
FIGS. 7A to 7C are cross-sectional views of a slab.
FIG. 8 is a cross-sectional view of the joint showing the joint between the upper shell and the 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]
1, 5, 7, 8, 9, 28 Embedding material 2 Divided piece 3 Linked body 4, 32 Hollow portion 6 Through hole 10, 29 PC plate 11 Concrete plate 12 Truss 13 Upper chord 14 Lower chord 15 Lattice 16 Bending Reinforcing bar 17 Through groove 18, 31 Slab 19 Long beam 20 Short beam 21 Lower floor 22 Slab upper end bar 23, 30 Top concrete 24, 33 Upper shell 25, 34 Lower shell 26 Joint

Claims (3)

Arranged four divided pieces so as to form a planar cross-shaped through-hole penetrating vertically to and fro, and octopus these split pieces are joined by cross rhombic, circular cross section or any of the coupling member of an elliptical section An embedding material for concrete slabs. Four divided pieces are arranged side by side so as to form a planar cross-shaped through-hole penetrating up and down, and these divided pieces are joined by a connecting body having a cross-sectional rhombus, circular cross-section, or elliptical cross-section . A precast concrete board, wherein a concrete slab embedding material is installed on an upper surface of a concrete board. Four divided pieces are arranged side by side so as to form a planar cross-shaped through-hole penetrating up and down, and these divided pieces are joined by a connecting body having a cross-sectional rhombus, circular cross-section, or elliptical cross-section . A concrete slab embedding material is placed on the top surface of the concrete plate to form a precast concrete plate, and the precast concrete plate is laid adjacently between the beams to form a lower floor, and the top concrete is cast on the lower floor. A hollow concrete slab characterized by being provided.

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