JP4545967B2 - Construction method of T-beam slab - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a T-shaped beam slab in which small beams are formed in parallel at predetermined intervals on the lower surface side of a flat slab.
[0002]
[Prior art]
When constructing slabs for the ceiling and floor surfaces of condominiums, etc., first lay down a plywood board, such as a plywood, on the lower surface of the slab, assemble the mold, and then place concrete on the slab. After setting and curing, it is common practice to remove the slats and perform formwork separation, and finally, finish the interior on the downward surface as the ceiling surface.
[0003]
Recently, wide spans of slabs have been developed. Since flat slabs with uniform thickness are insufficient in strength, T-beam slabs with reinforced slabs by slab cross sections have been used.
[0004]
This T-shaped beam slab is formed by integrally forming ribs on the lower surface of the flat slab at predetermined intervals. The flat slab is a small beam installed at predetermined intervals between large beams or bearing walls. It has the same strength as that supporting
[0005]
[Problems to be solved by the invention]
However, since such a T-shaped beam slab must be formed with a large number of protrusions on the ceiling surface side, the assembly and support of the formwork is very troublesome compared to a flat slab, and the construction period and cost are increased. In addition, after concrete curing, there was a problem that the irregularities of the small beams were formed on the ceiling surface, so that the appearance was not good, and the interior work was troublesome and costly.
[0006]
More recently, the next-generation energy-saving standards have been announced, and after removing the formwork on the inner wall surface on the ceiling surface, in order to block the heat return of the concrete and increase the heat insulation of the house and prevent condensation in the wall. There was a problem that the insulation board and the base board were stuck in two layers, or the base board formed of the heat insulation material had to be attached, which increased the construction materials, extended the construction period, and increased the cost. .
[0007]
Therefore, the present invention, when constructing the T-shaped beam slab, flatten the ceiling surface side, eliminates the troubles of construction of the formwork, the interior baseboard and the heat insulating material, thereby reducing the building materials, The technical challenge is to shorten the construction period and reduce construction costs.
[0008]
[Means for Solving the Problems]
In order to solve this problem, the present invention is a method for constructing a T-shaped beam slab in which small beams are integrally formed at a predetermined interval on the lower surface side of a flat slab, and is capable of directly stretching an interior material such as wallpaper. Formwork combined interior baseboard in which fireproof load-bearing face material and heat insulation panel are laminated is laid down on the lower surface height of the T-shaped beam slab, and a heat insulating embedding material filled between the small beams is placed on the baseboard, Underlay the insulation embedded material by engaging the upper and lower ends of the fastening rod penetrating the insulation insulation material with the base fixed to the foundation board and the bar arrangement spacer placed on the top surface of the insulation insulation material. After the bar is fixed and placed, concrete is placed so that the heat-insulating embedding material is buried and a flat slab having a predetermined thickness is formed.
[0009]
According to the present invention, a flame-retardant or non-flammable heat-insulating embedding material filled between small beams is provided with a base fixed to a base board and heat-insulating embedding at both upper and lower ends of a fastening rod penetrating therethrough. By connecting to the bar arrangement spacer placed on the upper surface of the material, it is tightly fixed to the formwork and interior baseboard, and the portion without the heat-insulating embedded material becomes a groove for forming a small beam.
Therefore, the T-beam slab can be constructed without complicated assembly of the formwork to form the beam.
[0010]
Next, when concrete is placed, the concrete flows into the concave groove to form a small beam, and further, when the heat insulating embedded material is buried in the concrete, a flat slab having a predetermined thickness is formed thereon.
At this time, the heat-insulating embedding material is firmly fixed to the formwork / interior base board via the clamping rod, and the base board is suspended from the flat slab via the clamping rod. Even if an external force is applied to the base board attached to the bottom surface, it will not fall off easily.
[0011]
In the present invention, as this formwork, since a firework-proof load-bearing material that can be directly stretched with interior materials such as wallpaper and a heat-insulating panel are used, the formwork-combined interior base board is used, and after curing the concrete, it was used as a formwork. It is not necessary to disassemble the formwork combined interior base board, and interior work can be performed as it is.
That is, since the work for removing the formwork and the interior base treatment are not required at all, the number of processes is reduced, the construction period is shortened, and the amount of building materials used is reduced.
[0012]
In addition, since the heat insulating embedding material is filled between the small beams protruding from the lower surface of the flat slab and the interior base board covers the lower surface of the T-shaped beam slab flatly, the unevenness of the small beams protrudes from the ceiling surface. There is no.
[0013]
In addition, the concrete surface side of the formwork combined interior baseboard is covered with a heat insulating panel to cover the entire lower surface of the concrete, so that heat reflux is blocked and indoor warm air and cool air can escape to the outside through the concrete. And the occurrence of a heat bridge is reliably prevented.
[0014]
Furthermore, when assembling the formwork, the base fixed to the fireproof load-bearing surface material of the interior baseboard for both formwork and the reinforcing bar spacers placed on the heat-insulating embedded material are engaged with both ends of the clamping rod. The heat insulating embedding material is fixed to the fireproof load-bearing surface material, and after the concrete is hardened, the reinforcing bar spacer is buried in the concrete, so that the formwork and interior baseboard is firmly suspended and fixed to the lower surface of the T-shaped beam slab.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a sectional view showing a T-shaped beam slab constructed by the method of the present invention, and FIG.
[0016]
This example was arranged in the mold alternate interior base board 1 a heat insulating filler material 2 at predetermined intervals, by pouring the concrete on it, joists S ₂ on the lower surface of the flat slab S ₁ is given The T-shaped beam slab S formed integrally with the interval is constructed.
[0017]
The formwork / interior base board 1 is integrally formed by laminating a fire-resistant load-bearing surface material 3 capable of directly stretching an interior material such as wallpaper and a flame-retardant or non-flammable heat insulating panel 4.
As the fireproof load-bearing face material 3, a fiber reinforcing layer 3B in which a main agent containing mineral fibers is hardened with a binder on both front and back surfaces of a core plate 3A in which the main agent containing an inorganic foam and a fibrous material is hardened with a binder, A die light (trade name of Daiken Kogyo Co., Ltd.) having a thickness of about 6 to 12 mm formed by integrally molding 3B into a three-layer structure was used.
[0018]
This fireproof load-bearing face material 3 is a porous body in which inorganic raw materials are entangled in a fibrous form, and has the same strength as a special structural plywood, and is antiseptic, antproof, fireproof, and ventilated. It has excellent properties and is suitable for building materials, with very little expansion due to moisture absorption.
[0019]
The heat insulation panel 4 preferably has a low thermal conductivity and excellent fire resistance. In this example, the foamed phenol has a thermal conductivity of 0.017 kcal / m · h · ° C. (0.020 W / m · K). A resin-made neoma foam (trade name of Asahi Kasei Construction Materials Co., Ltd.) having a thickness of 50 to 70 mm and a bead foam styrene board were used.
[0020]
2A and 2B are a bottom view and a cross-sectional view of the heat-insulating embedding material 2, respectively.
The heat insulating embedding material 2 is formed of Neomafoam (trade name of Asahi Kasei Building Materials Co., Ltd.) or bead foamed styrene board, like the heat insulating panel 4, and is partitioned into a plurality of spaces 5 with its bottom side open, The side wall portion 6 that forms one space 5a is formed with an uneven surface 7 having a continuous triangular wave shape that attenuates the reverberant sound.
[0021]
A split groove 8 is formed on the center line X so that the length can be easily adjusted in half at the site with a center line Y orthogonal to the center line X extending in the longitudinal direction as a boundary. Through-holes 9 and 9 through which the attached rod 14 is inserted are formed.
[0022]
Further, a concave groove (fragile portion) that cuts the upper surface portion of the space 5b on the upper surface of the heat insulating embedding material 2 so that concrete can be poured into the space 5b adjacent to the through hole 9 as necessary. ) 10 is formed.
Furthermore, in the space 5 having a relatively large area, legs 5c are formed so that the upper surface of the embedding material 2 is not crushed by its weight when placing concrete.
[0023]
Reference numeral 11 denotes an embedding material fixing tool, which is fixed to the fire-resistant load-bearing face material 2 of the mold / interior base board 1 with an adhesive or a screw corresponding to the position of the through hole 9 of the heat-insulating embedding material 2. The base 12, the bar arrangement spacer 13 placed on the heat insulation embedding material 2, and the heat insulation by being inserted into the through hole 9 of the heat insulation embedding material 2 and engaging both the upper and lower ends with the base 12 and the spacer 13. It consists of a clamping rod 14 for fixing the embedding material 2.
[0024]
The base 12 and the bar arrangement spacer 13 are respectively formed with engaging portions 12a and 13a that engage with the upper and lower ends 14u and 14d of the tightening rod 14, and the bar arrangement spacer 13 does not fall out of the concrete. Thus, the flange-like anchor 15 that increases the tensile resistance is formed.
[0025]
Therefore, the heat-insulating embedding material 2 is placed on the formwork / interior base board 1, the fastening rod 14 is inserted into the through hole 9, and the lower end thereof is engaged with the base 12. When engaged with the bar arrangement spacer 13, the heat insulating embedding material 2 is pressed from the upper surface by the bar arrangement spacer 13 and is brought into close contact with the underlying board 1.
[0026]
Next, a T-shaped beam slab construction method using the formwork / interior base board 1 and the heat insulating embedded material 2 will be described.
First, the formwork / interior base board 1 is laid flat on the bottom surface of the T-shaped beam slab S with the heat insulation panel 4 facing upward, and the heat insulation embedding material 2 is separated in the width direction by a predetermined distance in the longitudinal direction. Then, the tightening rod 14 is inserted into the through hole 9, the lower end portion 14d is inserted into the engaging portion 12a of the base 12 and engaged, and the upper end portion 14u has a bar arrangement spacer. Wear 9
[0027]
Thus, on the mold serves interior base board 1, the projection continuous in the longitudinal direction of the heat insulating filler material 2 is formed, and type of joists S ₂ between the adjacent heat-insulating filler material 2 columns Will be formed.
Next, when concrete is placed by placing the bars as designed in advance so as to obtain a predetermined strength, the concrete flows into the concave grooves formed between the rows of the heat-insulating embedding material 2, and the small beams S ₂ . When the concrete is further placed, the heat insulating embedding material 2 is buried to form a flat slab S ₁ having a required thickness, and the flat slab S ₁ and the small beam S ₂ . A T-shaped beam slab S is constructed.
[0028]
At this time, the heat-insulating embedding material 2 is firmly fixed to the formwork / interior base board 1 by the embedding fixture 11, and the base board 1 is suspended from the flat slab S ₁ via the embedding fixture 11. Since it is lowered, even if an external force is applied to the base board 1 attached to the lower surface of the T-shaped beam slab S, it is difficult to fall off.
That is, the embedding fixture 11 fixes the heat insulating embedding material 2 to the base board 1 for both the formwork and interior, and the anchor 15 is provided on the bar arrangement spacer 13 engaged with the upper end of the tightening rod 14. Since it is formed, it has a function to suspend and fix the interior base board 1.
[0029]
Since interior materials such as wallpaper can be directly stretched, the interior foundation board 1 for both the formwork can be used for interior work as it is without hardening the formwork and interior foundation board 1 used as a formwork after the concrete has hardened. Can be done.
That is, since the work for removing the formwork and the interior base treatment are not required at all, the number of processes is reduced, the construction period is shortened, and the amount of building materials used is reduced.
[0030]
Moreover, the heat insulating embedding material 2 is filled between the beams S ₂ to be protruded on the lower surface of the flat slab S _1, since the interior base board 1 is flat cover lower surface of the T-beam slab S, small ceiling face beam without unevenness of S ₂ is protruded, or appearance.
[0031]
In addition, a heat insulating panel 4 is stretched on the concrete surface side of the interior frame board 1 for both the formwork and the entire lower surface of the T-shaped beam slab S is covered. Thus, the occurrence of heat bridge is reliably prevented without escaping to the outside.
[0032]
【The invention's effect】
As described above, according to the present invention, when the T-shaped beam slab is constructed, the ceiling surface side can be formed flat, and it is troublesome to construct the formwork, the interior base board and the heat insulating material. As a result, the construction material can be reduced, the construction period can be shortened, and the construction cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a sectional view of a T-shaped beam slab constructed by the method of the present invention.
FIG. 2 is a view showing an insulating embedding agent used in the method of the present invention.
[Explanation of symbols]
1 ......... formwork combined interior base board 2 ......... insulation filler material S _{1 .........} flat slab S _{2 .........} joists S ......... T-beams slab 3 ......... refractory strength facings 4 ......... Insulation panels 5, 5a, 5b ......... Space 6 ......... Side wall 7 ......... Uneven surface 9 ......... Through hole 10 ......... Ditch (fragile part)
11 ......... Embedding fixture 12 ......... Base 13 ......... Spacer spacer 14 ......... Tightening rods 14u, 14d ......... Upper and lower ends 12b, 13b ......... engagement portion 15 ... …anchor

Claims (4)

A method for constructing a T-shaped beam slab in which small beams (S ₂ ) are integrally formed at a predetermined interval on the lower surface side of a flat slab (S ₁ ), which can be directly stretched with interior materials such as wallpaper. A formwork / interior base board (1) in which a material (3) and a heat insulation panel (4) are laminated is laid down on the lower surface of the T-shaped beam slab, and is embedded between the small beams (S ₂ ). A base (2) is placed on the base board (1), and the upper and lower ends of the fastening rod (14) penetrating the heat insulating embedding material (2) are fixed to the base board (1) ( 12) and fixing the heat insulating embedding material (2) to the base board (1) by engaging the bar arrangement spacer (13) placed on the upper surface of the heat insulating embedding material (2), striking the concrete so that the heat insulating embedding material (2) is buried predetermined thickness of the flat slab (S ₁₎ is formed Method for constructing a T-beam slab, characterized by. The heat insulating embedding material (2) is divided into a plurality of spaces (5...) Having an opening on the bottom surface thereof, and unevenness that attenuates the reverberant sound on the side wall (6) that forms at least one space (5a). The method for constructing a T-shaped beam slab according to claim 1, wherein the surface (7) is formed. 3. The T according to claim 2, wherein the heat-insulating embedding material (2) is formed with a fragile portion (10) that cuts an upper surface portion of at least one space (5 b) and vertically penetrates the space (5 b). Construction method of form beam slab. The method for constructing a T-shaped beam slab according to any one of claims 1 to 3, wherein a concrete anchor (15) for increasing tensile resistance is formed on the reinforcing bar spacer (13) .

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