JP3346947B2 - Substrate for concrete slab having embedded material with low height in part, construction method of concrete slab using the substrate, and its structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin conduit (CD tube) used as a shield for electric wiring and telephone wiring, and a sheath for water supply, hot water supply, etc., inside a concrete slab of a building. The present invention relates to a concrete slab substrate capable of easily laying pipes for various facilities such as pipes, a concrete slab construction method using the substrate, and a structure having the substrate.

[0002]

2. Description of the Related Art In recent years, floor structures of concrete condominiums generally have a straight floor and a straight ceiling finish from the viewpoint of economic efficiency and the like, and various pipes as described above are directly buried in a concrete slab. It is supposed to be. On the other hand, as a concrete slab construction method, as shown in FIG. 3, for the purpose of reducing the weight and improving the sound insulation effect, for example, as shown in FIG. A plurality of the embedding materials 1 are arranged on the concrete substrate 3 provided with the truss bars 2 at predetermined intervals during a curing process in which the concrete is uncured, and are locked by the locking tools. Using a substrate A for hollow concrete slab in which the embedding material 1 is fixedly fixed to a concrete substrate 3, the substrate A for concrete slab is carried into a construction site, and as shown in FIG. A method of constructing a so-called hollow concrete slab CS by arranging an in-place concrete C after arranging the upper slab upper line 4 and the like between the B slabs and the like is widely performed. FIG. 5 and FIG. 6 show an example of the embedding material 1 and the top plate 10.
A box-shaped (rectangular) shape as a whole having a side wall portion 11 and a partition wall 12 and a plurality of hollow portions S with one side opened inside (Japanese Patent Publication No. 57-47008). Etc.). This hollow portion S is provided for the purpose of reducing the weight of the embedding material and saving the material.

[0005] In the concrete slab CS using the above-described embedding material 1, when performing the above-described embedding work of the pipe, as shown in FIG. The above-described pipe P is disposed in the cast-in-place concrete filling space SS formed in the above, and the cast-in-place concrete is poured from above. For this reason, it is necessary to take a detour for piping between two target points, and a piping distance longer than the originally required distance is required. In addition, the amount of concrete cast by the volume occupied by the piping is reduced.

[0004]

When the number of pipes to be buried in a concrete slab is small, the effect of an increase in the pipe distance on the construction cost is small and there is no particular problem. Further, even if a pipe is arranged in a space for filling cast-in-place concrete between the embedded materials and the cast-in material, and cast-in-place concrete is poured from above, the cast concrete spreads densely in the space. The concrete slab does not suffer significant cross-sectional defects because the amount of cast concrete can be reduced.

[0005] However, in concrete-type apartment houses constructed in recent years, in addition to conventional pipes for electricity and telephone lines, pipes for wiring for satellite broadcasting and cable broadcasting, wiring for home security equipment, and more. Various pipes, such as pipes for water supply and hot water supply, etc., as sheaths have been buried in concrete slabs.Moreover, since there is a tendency to arrange respective outlets for each room For distribution of electricity, water, etc., the number of necessary branches of piping is also increasing, and the piping distance is also increasing.

For this reason, as shown in FIG. 7, a large number of pipes P are arranged in the space SS for filling concrete, and if sufficient attention is not paid during the casting of cast-in-place concrete, the space P There is a case where a gap is formed between the pipes P without the concrete intruding densely in the SS. In addition, since the amount of concrete to be cast is reduced, sufficient construction management is required from this aspect as well. Furthermore, arranging a large number of pipes while bypassing the concrete filling space formed in a mesh shape requires a lot of work, and also increases the pipe distance.

[0007] There is also a method of partially cutting or grooving an embedding material to form a passage for piping at a building site, and shortening the piping distance by performing piping through the passage. However, it is not easy to add processing to the embedding material at the site, and when the embedding material is processed, the processing surface may communicate with the hollow portion, and the in-situ casting may be performed as it is. When concrete is cast, cast-in-place concrete may enter the hollow portion from the open surface and the weight of the portion may become excessive.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems that occur when a large number of equipment pipes are embedded in a concrete slab having an embedded material made of a synthetic resin foam molded article therein. In particular, a concrete slab substrate capable of easily arranging a large number of pipes with a short pipe distance and maintaining a required porosity, and a concrete slab using the substrate And a construction having such a concrete slab substrate.

[0009]

A substrate for a concrete slab according to the present invention for solving the above-mentioned problems is a concrete slab in which an embedding material made of a synthetic resin foam molded article is arranged on a concrete substrate at predetermined intervals. In the slab substrate, the embedding material at the place where the piping is to be laid when the concrete slab is constructed using the concrete slab substrate has a lower height than other embedding materials. It is characterized by having. The difference in height is preferably about the same as the diameter of the pipe to be arranged. The embedding material used may be solid or may have a hollow portion as conventionally known.

The present invention also relates to a method for constructing a concrete slab using the above-described concrete slab substrate, wherein the concrete slab substrate is laid at a portion where a pipe is to be provided, and the height of the concrete slab substrate is increased. Disclosed is a method for constructing a concrete slab, characterized in that necessary piping work is performed by passing through an upper surface of a low embedding material, and thereafter, cast-in-place concrete is poured from above.

The present invention also discloses a construction having the concrete slab substrate described above as a concrete slab substrate.

[0012]

According to the concrete slab substrate of the present invention, at the place where the pipe is planned at the time of constructing the concrete slab, it is preferable that the surrounding standard embedding material has a pipe diameter higher than that of the standard embedded material. The lowered embedding material is initially placed on the concrete substrate. Then, the piping work at the construction site is performed by passing the pipe through the upper surface of the embedded material having the low height. Therefore, the piping work can be easily performed without having to make a large detour around the piping, and the lower surface of the embedded material can be used as a space for piping, so multiple pipes are arranged in parallel. Even in the case where the pipes are used, piping can be performed with a short piping distance without taking a detour.

After the necessary piping is completed, if necessary, the same work as in the conventional construction method, such as installation of the upper end of the slab, is performed, and cast-in-place concrete is cast. The height of the embedding material piped on the upper surface is preferably reduced to about the pipe diameter,
Since the height of the pipe is substantially the same as the height of the standard embedding material that is not piped, the work of attaching the top reinforcement of the slab can be performed in the same manner as in the case of the conventional concrete slab substrate.

In the concrete slab on which the concrete slab substrate according to the present invention is laid, it is possible to avoid a large number of pipes being concentratedly arranged in the cast-in-place concrete filling space SS as in the prior art. Insufficiency of integration between the cast-in-place concrete and the concrete substrate and the occurrence of voids due to equipment piping in the space can be avoided, and an embedding material without piping is used for a conventionally known concrete slab substrate. It is possible to maintain a high porosity as a whole concrete slab by placing the same height as the embedded material as it is, and placing the embedded material with a hollow part for the low height embedded material as well. The pipe can be buried without hindering the function as a hollow concrete slab.

[0015]

The present invention will be described below in more detail with reference to examples. FIG. 1 is a plan view schematically showing an example of a concrete slab CS portion of a building in which a concrete slab substrate A is disposed between beams B of a skeleton as shown in FIG. 4, for example. , Five concrete slab substrates A (A _{1 to} A ₅ ) are arranged.
Then, in the concrete slab CS, piping box V ₁ is attached to the second concrete slab substrate A ₂ as shown, toward the outlet 21, 22, 23 provided from there to 3-way side walls of, Various equipment pipes P1, P2 for electric wires or water as described above.
P3 has become a design be arranged, further a fourth concrete slab substrate A ₄ and fifth piping box V ₂ to a concrete slab for the substrate A _5, V ₃ is attached, for both pipe a box V ₂ and V ₃ and has a like connection designed similarly pipe P4. Hereinafter, an embodiment of the present invention will be described with reference to an example in which a concrete slab is constructed according to the design conditions.

In this case, when manufacturing the concrete slab substrates A _{1 to} A ₅ at the factory, the following five types of different structures are prepared. That is, as shown in the figure, at the time of the piping work at the construction site, the concrete slab substrate A ₁
The sheath tube P2 passes through the embedding materials x1 to x3 indicated by oblique lines located in the columns. Therefore, in manufacturing in this concrete slab substrate A ₁ factory, portions of the filler material x1~x3 indicated by hatching, as shown in FIG. 2, the tube diameter of about the height of the pipe P to be placed Is fixed, and standardized embedding materials 1... As shown in FIGS. 5 and 6 are arranged and fixed in other portions.

In the concrete slab substrate A ₂ , as shown in the figure, two embedding materials x 4 and x 5 indicated by oblique lines located in the third row from the right, and right and left of the embedding material x 5. The four embedding materials x6 to x9 to be used
1, P2 and P3 pass. Therefore, in the production of concrete slabs for the substrate A ₂ are arranged fixed lower implant member 1u of similarly high for five parts of the filler material x5~x9 indicated by hatching, the other parts e.g. The standardized embedding materials 1 as shown in FIGS. 5 and 6 are arranged and fixed.
The portion of the piping box V ₁ is mounted (x4
In part), placing a filler material of any shape or placing filler material 1u form the removal of the partial plumbing box V ₁ as required.

[0018] In the substrate A ₃ part for a concrete slab,
There is no plan to lay piping as shown. Thus, for concrete slabs substrate A _3, as in the prior, placing fixing the standardized implant member 1 ... over the entire surface of the concrete substrate. In concrete slab substrate A _4, as shown, 4 from the right
Filler material x10 from top of th column indicated by two diagonal lines, only x11 portion through pipe P4 is, in the concrete slab substrate A _5, 3 column of the lowermost filler material from the right x12
And two embedding materials x1 shown by oblique lines in the middle of the second row from the right
3, the pipe P4 passes only through the x14 portion. Accordingly, in concrete slabs substrate A _4, the implant member x10
For the part of, the embedding material 1u having a low height is arranged and fixed,
In the concrete slab substrate A _5, the implant member x12, the portion of the x14 height lower implant member 1
u is fixed. Also, the embedding material x11 portion and the embedding material x
To 13 parts of the filler material of any shape or placing filler material 1u form obtained by removing min piping boxes V ₂ and piping box V ₃ arranged and fixed as required. Then, standardized embedding materials 1 are arranged and fixed in the remaining portions.

The concrete slab substrate A
₁ to A _5, except that a portion of the lower implant member 1u height arranged fixed, as in the case of a conventional concrete slab substrate disclosed in, for example Japanese Patent Publication 57-47008 Patent Publication Manufactured. When constructing a concrete slab, a plurality of types of concrete slab substrates (A _{1 to} A ₅ ) manufactured in a factory as described above corresponding to the piping design situation of the concrete slab in each dwelling unit or each floor are collectively assembled. And brought to the construction site of the building. At the construction site, each concrete slab substrate having a different shape is arranged between the beams B of the skeleton in accordance with the design drawing, and then the pipes P1 to P4 are passed through the upper surface of the low embedding material 1u in a predetermined manner. Arrangement work is performed, and then, as in the case of the conventional construction method, reinforcement of the slab upper end bar and the like is performed, and concrete slab construction is completed by placing cast-in-place concrete.

FIG. 2 is a perspective view showing an example of the above-described concrete slab substrate A according to the present invention. In this example, a portion where piping P is to be arranged and a portion where a piping box V is to be attached is removed. the location, height implant member 1u is mounted to be approximately 1/2 of the other filler material, the portions piping box V is attached form the removal of the partial plumbing box V ₃ An embedding material 1u is attached,
A conventional standardized embedding material 1 is fixedly fixed to the other portions (note that truss bars are not shown in FIG. 2 for ease of illustration). The embedding material of the portion to which the piping box V is attached may be of an arbitrary shape, and the embedding material may not be provided depending on the size of the piping box V. Furthermore, when the piping box V is not attached to the concrete substrate 3, a low-height embedding material 1u is also arranged at that portion. After the concrete slab substrate A of this type is brought into the construction site and laid at a predetermined location, an arbitrary number of pipes (two pipes P and Pa in the illustrated example) are buried with a low height. It is arranged through the upper surface of the filling material.

The embedding material 1u may be solid or hollow. Further, the embedding material 1u may be fixed to the concrete substrate by an adhesive, an adhesive tape, or an appropriate fixing tool.
Further, another embedding material made of a plate-shaped synthetic resin foam molded product or the like is placed and fixed with an adhesive or the like on the upper surface portion left after the pipe P is arranged on the upper surface of the embedding material having a low height. You may do so. Thereby, the volume of the embedded material having a low height and the volume of the embedded material as another standard product can be made substantially the same, and the porosity of the concrete slab can be further increased.

In the concrete slab substrate according to the present invention, since the surface of the embedded material having a low height is a flat surface, it is particularly easy to arrange a plurality of pipes in a plane, and a large number of pipe work is performed. Can be performed more reliably.
As can be understood from the above description, according to the present invention, the laying of pipes which had to be arranged in the space for cast-in-place concrete filling conventionally formed between the embedding material and the embedding material, By using the concrete slab substrate according to the present invention, it is possible to perform the process with a short piping distance. Also, when arranging a plurality of pipes simultaneously in a plane,
Since the disposed pipe itself functions as a void forming material, the hollow ratio of the concrete slab can be sufficiently averaged.

Naturally, the shape of the embedding material 1 as a standard material to be arranged is arbitrary, and the embedding material having an opening for removing steam generated during curing of the concrete substrate from the hollow portion S is formed. Material (see JP-A-5-208410)
Etc. can also be used effectively. In addition, the mounting of the embedding material to the concrete substrate is also limited to the conventional method where the concrete is mounted with the locking tool in the uncured state, and reactive type bonding such as urethane-based adhesive in the uncured state of the concrete. A method of bonding and fixing using an adhesive or the like, or a method of fixing the concrete using a fastener such as a concrete nail, an adhesive, an adhesive tape or the like after hardening of the concrete (Japanese Unexamined Patent Publication No. 5-2)
No. 08411) can also be used.

[0024]

As is clear from the above description, by using the substrate for concrete slab according to the present invention,
The piping work at the time of constructing the concrete slab becomes easy, and the piping distance can be shortened.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a concrete slab constructed using a concrete slab substrate according to the present invention.

FIG. 2 is a perspective view illustrating a concrete slab substrate and a use state thereof according to the present invention.

FIG. 3 is a bird's-eye view showing a conventional concrete slab substrate.

FIG. 4 is a diagram showing an example of a concrete slab and a structure using a conventional concrete slab substrate.

FIG. 5 is a diagram showing an example of an embedding material.

FIG. 6 is a diagram showing an example of an embedding material.

FIG. 7 is a diagram illustrating a piping state using a conventional concrete slab substrate.

[Description of sign]

A: Concrete slab substrate, P: Piping, V: Piping box, 1: Standard embedding material, 1u: Low embedding material, 3: Concrete substrate

Claims (3)

(57) [Claims] 1. A concrete slab substrate in which an embedding material made of a synthetic resin foam molded article is arranged at predetermined intervals on a concrete substrate, wherein the concrete slab is constructed using the concrete slab substrate. A substrate for a concrete slab, wherein a height of an embedding material at a place where a pipe is to be laid is lower than other embedding materials. 2. A concrete slab substrate, wherein the concrete slab substrate according to claim 1 is laid at a portion where a pipe is to be provided, and passes through an upper surface of an embedding material having a low height of the concrete slab substrate. A method for constructing a concrete slab, which comprises performing necessary plumbing work and then pouring cast-in-place concrete from above. 3. A structure having the concrete slab substrate according to claim 1 as a concrete slab substrate.