JP3584210B2 - Embedded material for concrete slab, precast concrete plate and hollow concrete slab - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an embedding material for a concrete slab, a precast concrete plate, and a hollow concrete slab.
[0002]
[Prior art]
As shown in (1) and (2) of FIG. 19, the hollow concrete slab is constructed by casting a top concrete 39 on a precast concrete plate 38 provided with a concrete slab embedding material 37. This hollow concrete slab 40 is light and has the same heavy floor impact sound performance as a slab without the concrete slab embedding material 37 disposed therein.
[0003]
However, in the hollow concrete slab 40, the upper concrete (hereinafter, referred to as upper shell) 41 and the lower concrete (hereinafter, referred to as lower shell) 42 in the hollow portion of the concrete slab embedding material 37 cause resonance, that is, a so-called drum phenomenon. In particular, there is a problem that the light weight floor impact sound performance is remarkably reduced in a frequency band around 1 KHZ.
[0004]
Therefore, in order to prevent such a drum phenomenon, a hollow concrete slab 43 in which a concrete slab embedding material 37 is divided into a plurality of parts, such as four parts, as shown in FIG.
[0005]
[Problems to be solved by the invention]
However, there is a problem that since the embedding material for concrete slab is divided into a plurality of pieces, installation on a concrete plate takes time.
[0006]
The present invention has been made in view of these problems, and an object thereof is to provide a concrete slab that can be easily installed on a concrete plate and that can prevent resonance between an upper shell and a lower shell, that is, a drum phenomenon. It is to provide an embedding material, a precast concrete plate and a hollow concrete slab.
[0007]
[Means for Solving the Problems]
Means for solving the above problems are as follows. The embedding material for concrete slab of claim 1 is characterized in that at least one groove provided on an upper surface and a lower surface intersects, and these grooves form a through hole at the intersection. depth der that can be formed is, on the lower surface, characterized in that the branch groove communicating with the lower surface of the groove provided, also concrete slab embedding material of the invention of claim 2, in claim 1, through A cylindrical portion having the same depth as the groove on the upper surface is provided at the upper part of the hole, and the embedding material for concrete slab according to the invention of claim 3 is the same as that of claim 1 or 2, wherein the groove has a short side. The embedding material for concrete slab according to the invention of claim 4 is characterized in that the cut grooves penetrating the upper and lower surfaces extend along the long side direction or the short side direction. At least one branch, which is connected to the cut groove Is provided on the lower surface, and the precast concrete plate of the invention according to claim 5 is characterized in that at least one or more of the embedding materials for concrete slabs according to claims 1 to 4 are installed on the concrete plate. The hollow concrete slab of the invention according to claim 6 is characterized in that at least one or more of the precast concrete plates according to claim 5 are laid in a state adjacent to a space between beams to form a lower floor. It is characterized by casting top concrete on the floor.
[0008]
The grooves on the upper and lower surfaces of the embedding material can form ribs that increase the rigidity of the upper and lower shells of the hollow concrete slab, and the upper and lower shells are connected by through holes, so that these resonances occur. That is, the drum phenomenon can be prevented. The grooves on the upper surface can be effectively used for piping and wiring. Further, the top portion is easily poured into the through hole by the cylindrical portion. The grooves and branches on the lower surface serve as drains for drainage. Also, when top concrete is poured into the cut grooves that penetrate the upper and lower surfaces, the embedding material for concrete slabs is divided into multiple pieces and installed, and the upper shell and lower shell are connected. , These resonances, that is, the drum phenomenon, can be prevented. The present invention can provide a precast concrete plate and a hollow concrete slab that prevent a drum phenomenon and enhance a lightweight floor impact sound performance.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of an embedding material for a concrete slab (hereinafter, referred to as an embedding material), a precast concrete board (hereinafter, referred to as a PC board), and a hollow concrete slab (hereinafter, referred to as a slab) of the present invention will be described with reference to the drawings. 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 will be described. Will be described with different reference numerals.
[0010]
FIG. 1 shows an embedding material 1 according to the first embodiment. The embedding material 1 is a foamed material such as a polystyrene resin or a polyolefin resin. The embedding material 1 is provided in a state where a single groove 2 intersects on the upper and lower surfaces, and a stopper 3 is formed below four corners. Have been. The upper groove 2a on the upper surface is formed substantially at the center along the short side direction, with the upper side being wider and having a depth of at least half the thickness H of the embedding material. On the other hand, the lower groove 2b on the lower surface is also provided substantially at the center along the long side direction, with the lower side being wide and having a depth of at least half the thickness H of the embedding material. Accordingly, a through hole 4 penetrating vertically is formed at the intersection of the upper groove 2a and the lower groove 2b, and a top concrete (not shown) is cast into the lower groove 2b from here. Since the upper groove 2a and the lower groove 2b are wide at one end side, the top concrete is easily cast. In addition, the upper groove 2a and the lower groove 2b are not limited to the above-described cross-sectional shapes, and may have any shape other than a rectangular cross-section, a circular cross-section, and a U-shaped cross-section. Furthermore, even if the upper groove 2a and the lower groove 2b do not penetrate to both ends of the embedding material, they may be formed only to the middle part as long as they intersect.
[0011]
FIG. 2 shows an embedding material 5 according to the second embodiment. This embedding material 5 is provided with a cylindrical portion 6 having the same depth as the upper groove 2a above the through hole 4 so that top concrete can be easily poured into the lower groove 2b. It has the same configuration as the embedding material 1 in the form. Since the cylindrical portion 6 has the upper groove 2a cut out in a circular shape, an insertion hole 3 for a locking tool is formed on the bottom surface. Further, when the embedding material 5 is divided into two along the upper groove 2a, the driving margin 3 on the bottom surface of the cylindrical portion can be used as the driving margin at the four corners of the divided embedding material.
[0012]
FIG. 3 shows an embedding material 7 according to the third embodiment. The embedding material 7 is provided with a branch groove 8 communicating with the lower groove 2b on the lower surface of the embedding materials 1 and 5 of the first and second embodiments. 5 has the same configuration. The branch grooves 8 are intended to reduce the weight of the embedding material 7, and can be formed as drains for drainage by communicating with the lower grooves 2 b .
[0013]
4 and 5 show embedding materials 9 and 10 of the fourth and fifth embodiments. These embedding materials 9 and 10 have two or three upper grooves 2a, and have the same configuration as the embedding material 1 of the first embodiment except for this. When the number of the upper grooves 2a is plural as described above, top concrete is cast from the plurality of through holes 4 into the lower grooves 2b.
[0014]
FIG. 6 shows an embedding material 11 according to a sixth embodiment. The embedding material 11 has two lower grooves 2b, and has the same configuration as the embedding material 1 of the first embodiment except for this. As described above, the upper groove 2a and the lower groove 2b can be provided in an arbitrary number as needed, and can be formed in an arbitrary number in combination. Further, the upper groove 2a can be provided along the long side direction of the embedding material 1, and the lower groove 2b can be provided along the short side direction of the embedding material 1.
[0015]
In addition, the embedding materials 9, 10, and 11 of the fourth to sixth embodiments include the cylindrical portion 6 of the embedding material 5 of the second embodiment and the embedding material 7 of the third embodiment. At least one branch groove 8 may be provided.
[0016]
FIG. 7 shows an embedding material 12 according to a seventh embodiment. The embedding material 12 is provided with a cut groove 13 penetrating in the upper and lower surfaces along the long side direction of the foam, and when the top concrete is poured therein, the embedding material 12 is divided into two. Become like
[0017]
FIG. 8 shows an embedding material 14 according to the eighth embodiment. This embedding material 14 is provided with a branch groove 8 communicating with the lower groove 2b on the lower surface, and can achieve the same effect as the embedding material 7 of the third embodiment.
[0018]
FIG. 9 shows an embedding material 15 according to the ninth embodiment. This embedding material 15 is provided with cut grooves 13 penetrating in the upper and lower surfaces along the short side direction of the foam, and has the same configuration as the embedding material 12 of the seventh embodiment except for this. is there.
[0019]
FIGS. 10 and 11 show embedding materials 16 and 17 of the tenth and eleventh embodiments. These embedding materials 16 and 17 are formed such that the embedding materials 16 and 17 are divided into four or six by forming a cut groove 13 in the long side direction and a cut groove 8 in the short side direction. Therefore, the same effect as the embedding material 12 of the seventh embodiment can be obtained. Note that these embedding members 16 and 17 can be provided with the same branch grooves 8 as the embedding member 14 of the eighth embodiment.
[0020]
Next, embodiments of the PC board using the above-described embedding material will be described. In each embodiment, the same components as described above are denoted by the same reference numerals, and different configurations are denoted by different reference numerals. Will be explained.
[0021]
FIG. 12 shows a PC board 18 according to the first embodiment. The PC board 18 is configured by placing the embedding material 1 of the first embodiment between truss bars 20 arranged at appropriate intervals along the long side direction of the concrete board 19. The truss bars 20 are formed by joining one upper chord bar 21 and two lower chord bars 22 arranged in a triangular shape with a corrugated lattice bar 23. It is joined to the muscle 24. The embedding material 1 is configured such that the embedding material divided into four by the upper groove 2 a and the lower groove 2 b is installed on the concrete plate 19. Also, top concrete is easily cast in the upper groove 2a, and top concrete is also easily cast from the through hole 4 in the lower groove 2b.
[0022]
FIG. 13 shows a PC board 25 according to the second embodiment. The PC board 25 has the embedding material 5 of the second embodiment installed between the truss bars 20 of the concrete board 19, and has the same configuration as the PC board 18 except for this. Also in this case, top concrete is easily poured into the through hole 4 from the cylindrical portion 6, and the embedding material 5 can be fixed at the center by the driving margin 3 formed on the bottom surface of the cylindrical portion 5.
[0023]
In addition, a PC board using the third to eleventh embedding materials 7, 9, 10, 11, 12, 14, 15, 16, 17 in addition to the PC boards 18 and 25, or the first to eleventh embedded materials. A PC board using at least two or more types of the embedding materials 1, 5, 7, 9, 10, 11, 12, 14, 15, 16, and 17 can also be formed.
[0024]
Next, embodiments of the slab using the PC boards 18 and 25 will be described. In each embodiment, the same components as described above are denoted by the same reference numerals, and different configurations are denoted by different reference numerals. A description is given below.
[0025]
14 to 16 show a slab 26 according to the first embodiment, in which a PC board 18 according to the first embodiment is laid between a long beam 27 and a short beam 28 to form a lower floor 29. Here, the upper slab reinforcement 30 is arranged, and the top concrete 31 is cast. The top concrete 31 is cast into the upper groove 2a and the lower groove 2b of the embedding material 1 to form an upper rib 34a and a lower rib 34b for increasing the rigidity of the upper shell 32 and the lower shell 33. Are joined by a connecting body 4 a of the through hole 4. Therefore, these resonances, that is, the drum phenomenon, can be prevented. That is, the upper ribs 34a and the lower ribs 34b are connected to the top concrete 31 cast between the embedding materials 1 in a grid pattern as shown in FIG. In particular, since the lower rib 34b is formed over the entire length of the lower shell (concrete plate 19) 33 in the long side direction, rigidity in the long side direction of the lower shell 33, that is, "bending" can be reduced. The vibration of 33 itself can be suppressed. Further, the upper ribs 34a intersecting with the lower ribs 34b are connected by the connecting body 4a to form a lattice, thereby increasing the rigidity of the entire slab 26.
[0026]
17 and 18 show a slab 35 according to the second embodiment, which is formed by placing a top concrete 31 on a lower floor 29 formed of a PC board 25 according to the second embodiment. Except for this, the configuration is the same as that of the slab 26 of the first embodiment. This makes it easier to cast the top concrete 31 into the through hole 4 and the lower groove 2b by the cylindrical portion 6 above the through hole 4, and otherwise provides the same effect as the slab 26 of the first embodiment.
[0027]
Also, a PC board using the third to eleventh embedding materials 7, 9, 10, 11, 12, 14, 15, 16, 17 or the first to eleventh embedding materials 1, 5, 7, 9 It is also possible to construct a slab using a PC board in which at least two of 10, 11, 12, 14, 15, 16, 17 are combined.
[0028]
【The invention's effect】
The upper groove and the lower groove of the embedding material can form a rib that increases the rigidity of the upper shell and the lower shell of the slab, and the upper shell and the lower shell are connected by the through-hole, so that these resonances, That is, the drum phenomenon can be prevented.
[0029]
The grooves on the upper surface can be effectively used for piping and wiring.
[0030]
The cylindrical portion makes it easier to pour the top concrete into the through hole.
[0031]
The lower groove and the branch groove can be used as drain water channels.
[0032]
When the top concrete is poured into the cut grooves that penetrate the upper and lower surfaces, the concrete slab embedding material is divided into a plurality of parts and the upper shell and the lower shell are connected, These resonances, that is, the drum phenomenon, can be prevented.
[0033]
The present invention can provide a precast concrete plate and a hollow concrete slab that prevent a drum phenomenon and enhance a lightweight floor impact sound performance.
[Brief description of the drawings]
FIG. 1 shows an embedding material according to a first embodiment, in which (1) is a perspective view, (2) is a plan view, (3) is a partially cutaway sectional view, and (4) is an A- of (1). A sectional view along line A, and (5) is a bottom view.
FIG. 2 is an embedding material according to a second embodiment, in which (1) is a perspective view, (2) is a plan view, (3) is a partially cutaway sectional view, and (4) is B- of (1). FIG. 5B is a sectional view taken along line B, and FIG.
FIG. 3 is an embedding material according to a third embodiment, (1) is a bottom view, and (2) is a partially cutaway sectional view.
FIG. 4 is an embedding material according to a fourth embodiment, wherein (1) is a plan view, (2) is a partially cutaway sectional view, (3) is a sectional view taken along line CC of (1), 4) is a bottom view.
FIG. 5 is an embedding material according to a fifth embodiment, wherein (1) is a plan view, (2) is a partially cutaway sectional view, (3) is a sectional view taken along line DD of (1), 4) is a bottom view.
FIG. 6 shows an embedding material according to a sixth embodiment, wherein (1) is a plan view and (2) is a side view.
FIG. 7 is an embedding material according to a seventh embodiment, wherein (1) is a plan view and (2) is a cross-sectional view taken along line EE of (1).
FIG. 8 is an embedding material of an eighth embodiment, (1) is a bottom view, and (2) is a cross-sectional view taken along line FF of (1).
FIG. 9 shows an embedding material according to a ninth embodiment, wherein (1) is a plan view and (2) is a cross-sectional view taken along line GG of (1).
FIG. 10 shows an embedding material according to a tenth embodiment, wherein (1) is a plan view, (2) is a cross-sectional view taken along line HH of (1), and (3) is an II line of (1). Fig. 4 is a sectional view taken along a line, and (4) is a bottom view.
FIG. 11 is an embedding material according to an eleventh embodiment, wherein (1) to (3) are plan views of the embedding material in which a long side cut groove and a short side direction cut groove are combined. It is.
12A is a plan view of the PC board according to the first embodiment, FIG. 12B is a cross-sectional view taken along the line JJ of FIG. It is sectional drawing.
13A is a plan view of a PC board according to a second embodiment, FIG. 13B is a cross-sectional view taken along line KK of FIG. 13A, and FIG. 13C is a view taken along the long side of FIG. It is sectional drawing.
FIG. 14 is a partially cutaway plan view of the slab according to the first embodiment.
15 (1) is a sectional view taken along line LL of FIG. 14, (2) is a sectional view taken along line MM, (3) is a sectional view taken along line N-N, and (4) is a sectional view taken along line OO of FIG. It is a line sectional view.
FIG. 16 is a plan view showing an upper shell and a lower shell of the slab according to the first embodiment.
FIG. 17 is a partially cutaway plan view of the slab according to the second embodiment.
18 (1) is a cross-sectional view taken along line PP of FIG. 16, (2) is a cross-sectional view taken along line QQ, (3) is a cross-sectional view taken along line RR, and (4) is an SS line of FIG. It is a line sectional view.
FIG. 19 (1) is a sectional view of a conventional slab, and (2) and (3) are partially cutaway sectional views of the conventional slab.
[Explanation of symbols]
1, 5, 7, 9, 10, 11, 12, 14, 15, 16, 17, 37 Embedding material 2 Groove 2 a Upper groove 2 b Lower groove 3 Placing margin 4 Through hole 4 a Connecting body 6 Cylindrical part 8 Branch groove 13 Notch grooves 18, 25, 38 PC board 19 Concrete board 20 Truss bar 21 Upper chord bar 22 Lower chord bar 23 Lattice bar 24 Bending reinforcement bar 26, 35, 40, 43 Slab 27 Long beam 28 Short beam 29 Lower floor 30 Slab Top bars 31, 39 Top concrete 32, 41 Upper shell 33, 42 Lower shell 34a Upper rib 34b Lower rib H Thickness of embedding material

Claims (3)

At least one groove provided on the upper surface and the lower surface intersects, these grooves have a depth capable of forming a through hole at the intersection, and the lower surface is provided with a branch groove communicating with the groove on the lower surface. Characteristic embedding material for concrete slabs. The embedding material for concrete slab according to claim 1, wherein a cylindrical portion having the same depth as the groove on the upper surface is provided at an upper portion of the through hole. The embedding material for concrete slab according to claim 1, wherein the groove is provided along the short side direction or the long side direction.
4. A cut groove penetrating the upper and lower surfaces is provided at least one along a long side direction or a short side direction, and a branch groove communicating with the cut groove is provided on a lower surface. Embedded material for concrete slab.
5. A precast concrete plate, wherein at least one 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 adjacent to a space between beams, and top concrete is cast on the lower floor. And hollow concrete slab.

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