JP3346948B2 - Concrete slab substrate having solid embedded material, 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 inside a concrete slab. It is supposed to be. On the other hand, as a construction method of a concrete slab, as shown in FIG. 5, an embedding material 1 having a hollow portion made of a synthetic resin foam molded product such as expanded polystyrene is used for the purpose of reducing the weight and improving the sound insulation effect. A plurality of concretes are arranged on a 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 locking members, and the embedding material 1 is hardened by hardening of the concrete. Using a substrate A for hollow concrete slab in which
The concrete slab substrate A is carried into a building construction site, and the required number of the slabs are placed between the beams B, B of the skeleton as shown in FIG. 2. Description of the Related Art Construction methods of casting and constructing a so-called hollow concrete slab CS are widely performed. 7 and 8 show an example of the embedding material 1. The embedding material 1 has a box-like (rectangular) shape as a whole having a top plate portion 10, a side wall portion 11, and a partition wall 12, and one side is opened inside. (See Japanese Patent Publication No. 57-47).
008, etc.). This hollow portion S is provided for the purpose of reducing the weight of the embedding material 1 and saving the material.

[0003] In the concrete slab CS using the above-described embedding material 1, when performing the above-described work of embedding a pipe, as shown in FIG. The above-mentioned facility pipe P is arranged in the space portion SS for filling in-place concrete formed in the above-mentioned area, and cast-in-place concrete is poured from above. for that 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] It has also been proposed to construct a concrete slab using a concrete slab substrate in which an embedding material having a concave groove on the upper surface is arranged, and cast-in-place concrete flows into the concave groove and solidifies. Accordingly, the vibration damping effect of the concrete slab is increased, and the groove can be used for piping (Japanese Utility Model Publication No. 60-3224).
No. 8).

[0005]

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.

[0006] However, in concrete-type apartment houses constructed in recent years, in addition to conventional pipes for electricity and telephone lines, wiring for satellite broadcasts and cable broadcasts, and pipes for home security equipment, and furthermore, 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.

Therefore, as shown in FIG. 9, a large number of pipes P are arranged in the space SS for concrete filling, 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.

In a piping work at a site where a concrete slab substrate in which an embedding material having a hollow portion is disposed on the entire surface is laid, the embedding material is partially cut or grooved to form a pipe passage. Although some of the piping distance is shortened by piping through the passage,
When the embedding material having a hollow portion is cut or grooved, the processed surface may communicate with the hollow portion, and when cast-in-place concrete is left as it is, from the processed surface Cast-in-place concrete may enter the hollow portion and the weight of the portion may be excessive. Thereby, the porosity as a concrete slab decreases.

Further, in the concrete slab substrate disclosed in Japanese Utility Model Publication No. 60-32248, all the embedding materials to be arranged have a concave groove on the surface, and the concave groove is used for piping. However, since the ratio of the pipe area to the total area of the concrete slab is small, the porosity of the concrete slab as a whole decreases as a result of the concave groove, so a concrete slab with a higher porosity is required. Have been.

An object of the present invention is to solve the above-mentioned problems which 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 and a concrete slab construction method using the substrate, which can maintain a high porosity at the same time while being able to reliably and easily arrange a large number of pipes, It is to provide a construction having such a concrete slab substrate.

[0011]

One embodiment of the concrete slab substrate according to the present invention for solving the above-mentioned problem is that a solid embedding material made of a synthetic resin foam molded article is provided on a concrete substrate in a predetermined shape. It is characterized by being arranged at intervals. Another embodiment of the concrete slab substrate according to the present invention is a concrete slab substrate in which an embedding material formed of a synthetic resin foam molded article is arranged at predetermined intervals on a concrete substrate. The embedding material at the place where the pipe is to be laid when constructing the concrete slab using the substrate is made solid, and the other embedding material is said to have a hollow part .

According to the present invention, as a concrete slab construction method using the concrete slab substrate, the concrete slab substrate of any one of the above embodiments is laid as necessary as a concrete slab substrate. Forming a passage for passing the piping member in the embedded material part which is a solid for the concrete slab substrate, performing the necessary piping work by passing through the passage, and then,
Disclosed is a concrete slab construction method characterized by casting cast-in-place concrete from above.

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

[0014]

According to the concrete slab substrate of the present invention, the formation of a pipe passage or a groove in an embedding material at a construction site is solid regardless of the concrete slab substrate of any aspect. Performed on certain implants. As a result, as in the case of cutting an embedded material having a conventional hollow portion, a communication hole to the hollow portion is formed when a pipe passage or a concave groove is formed, and cast-in-place concrete enters the embedded material. In addition, it is possible to avoid lowering the porosity. In addition, since it is solid, an operator can easily form a groove or a passage in any direction, and in particular, a concrete slab substrate in which all embedding materials are solid. In such a case, it is possible to promptly respond to a change in the piping arrangement at the construction site.

By performing the piping work by passing through the passage or the concave groove formed in this way, the piping work can be completed without detouring. When a plurality of pipes are arranged in parallel, a passage or a groove having a width required for the pipes can be formed reliably and easily. After completing the necessary piping, if necessary, the same work as the conventional method such as the installation of the top reinforcement of the slab is performed, and cast-in-place concrete is cast. Since the pipe enters the formed passage or groove, the height of the upper end of the pipe is almost the same as the height of the embedded material with the surrounding hollow part, and the upper end of the slab is attached. Etc. 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 concentrated in the cast-in-place concrete filling space SS as in the past. Insufficiency of integration between the cast-in-place concrete and the concrete substrate and generation of voids due to equipment piping in the space can be avoided. In addition, when the pipe having the same hollow portion as the embedding material used for the concrete slab substrate conventionally used as the embedding material in which the pipe is not arranged on the upper surface is directly arranged, the porosity of the entire concrete slab is Can also be kept high.

[0017]

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. 6, for example. , Five substrates (A _{1 to} A ₅ ) of concrete slab substrates A are arranged.
And 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 three directions sidewall of , P1 and P2 for various facilities for electric wire 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 and a box V ₂ and V ₃ pipe P
4 is designed to be connected. Hereinafter, an embodiment of the present invention will be described by taking as an example a case where 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 a factory, the following five types of different structures are prepared. In this embodiment, as illustrated, during piping work at construction sites, in the concrete slab substrate A _1, filler material x indicated by oblique lines is located in the third column from the right in FIG. 1
The pipe P2 passes through portions 1 to x3. Therefore, in the production of this concrete slab substrate A ₁ factory,
For the embedding materials x1 to x3 indicated by oblique lines, a solid embedding material 1u made of synthetic resin foam is arranged and fixed, and the other portions are standardized as shown in FIGS. 6 and 7, for example. The embedding material 1 having the hollow portion is arranged and fixed.

[0019] In concrete slab substrate A ₂ is a two filler material x4, x5 portion indicated by oblique lines is located in the third column from the right as shown, positioned to the left and right implant member x5 Four embedding materials x6 to x9 are connected to pipe P1,
P2 and P3 pass. Therefore, in the production of concrete slabs for the substrate A ₂ are five filler material x indicated by hatching
The filler material 1u a solid arranged fixed to the portion of the 5～X9, was cut to fit the shape of the piping boxes V ₁ as required in the portion (x4 portion) of the piping boxes V ₁ is attached An embedding material 1u having a shape is arranged. The embedding material 1 having a standardized hollow portion, for example, as shown in FIGS.

The concrete slab substrate A ₃ includes:
There is no plan to lay piping as shown. Thus, for concrete slabs substrate A _3, as in the prior, placing fixing the filler material 1 ... having a hollow portion which is standardized across the entire surface of the concrete substrate. In concrete slab substrate A _4, as shown, the filler material shown by two hatched from the top of the fourth column from the right x1
0, only the x11 portion through pipe P4 is, in the concrete slab substrate A _5, 2 pieces of embedding shown in the middle of the oblique line second column from the filler material x12 and right lowermost third column from the right The pipe P4 passes only through the portions x13 and x14.
Accordingly, in concrete slabs substrate A _4, the filler material 1u a solid arranged fixed to the portion of the implant member x10,
In addition, in the concrete slab A _5, the implant member x1
2. A solid embedding material 1u is arranged and fixed in the portion of x14. In addition, the embedding material x11 portion and the embedding material x13 portion include:
If necessary, place the implant member 1u form that was cut according to the shape of the piping boxes V ₄ and piping box V _5. The embedding material 1 having a standardized hollow portion as shown in FIGS. 6 and 7, for example, is arranged and fixed in other portions.

The concrete slab substrate A
₁ to A ₅ is arranged a solid filler material 1u to a particular location, except that 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 according to the design drawing, and then a passage (concave groove U in this example) required for piping is inserted into the solid embedding material 1u. Then, the pipes P1 to P4 are arranged while passing through the concave grooves U. Hereinafter, the reinforcement of the slab upper end reinforcement etc. is performed similarly to the conventional method, and the construction of the concrete slab is completed by placing the cast-in-place concrete.

FIG. 2 is a perspective view showing an example of the concrete slab substrate A according to the present invention described above. In this example, the position where the piping box V is mounted is adjusted to the shape of the piping box V. A cut embedding material 1u is arranged, and a solid embedding material 1u (shown by a two-dot chain line in the figure) is also arranged at a portion where a pipe is to be formed. And the embedding material 1 which has a hollow part is arrange | positioned as a remaining embedding material. The concrete slab substrate of this embodiment can be reduced in weight only by using an embedding material having a hollow portion in a portion that does not require piping, and is a preferred embodiment.

FIG. 3 shows that when the concrete slab is constructed,
This is a state in which a worker has formed a concave groove U for piping on a concrete slab substrate having such a structure laid on a skeleton, and one concave groove U and two concave grooves are formed according to the condition of the piping. U, or various forms of grooves as grooves U ₂ having the two widths of the pipe component is formed. The concave groove U preferably has a depth about the diameter of the pipe. Further, when a plurality of pipes are to be arranged to cross each other, a concave groove having a crossable depth is formed so that the upper surfaces of all the embedding materials are substantially flush after the pipes. It can be. Figure 4 is a diagram showing a state after pipe, the grooves U ₂ 2 pieces of pipes are passed in a parallel state.

Although not specifically shown, it can be understood that the initial object of the present invention can be achieved even when all the embedding materials arranged on the concrete substrate are constituted by solid embedding materials. . When the concrete slab substrate of this embodiment is used, the weight reduction of the concrete slab is somewhat hindered, but the degree of freedom of forming a groove or passage for piping in the embedding material is increased. Therefore, it is possible to flexibly cope with a case where it is expected that the piping condition needs to be changed.

As can be understood from the above description, according to the present invention, equipment for facilities which had to be disposed in the space for filling cast-in-place concrete conventionally formed between the embedding materials. By using the concrete slab substrate according to the present invention, the piping can be laid with a short piping distance through the upper surface of the embedding material 1u. In addition, despite the fact that the pipe work is performed while forming the pipe passages (concave grooves, etc.) necessary for the embedding material at the site, the processing at the site is a solid embedding material. Damage to the padding is kept to a minimum. In addition, when the embedding material other than the place where the pipe is to be planned is an embedding material having a hollow portion, a decrease in the porosity of the concrete slab can be minimized, and the weight of the concrete slab can be sufficiently reduced. In addition to the above, the objects of weight reduction and material saving of the embedding material can also be achieved. Also,
Since the pipe itself functions as a void forming material, the hollow ratio of the concrete slab is sufficiently averaged even though the concave groove is formed.

The shape of the embedding material 1 as a standard material to be arranged is arbitrary. In particular, when an embedding material having a hollow portion is used, the steam generated during curing of the concrete substrate is subjected to the hollow portion S. An embedding material (see Japanese Patent Application Laid-Open No. 5-208410) in which an opening is formed for removal from the opening 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 agent or the like, or a method of fixing the concrete using a fastener such as a nail after hardening of the concrete, or using an adhesive or an adhesive tape (see Japanese Patent Application Laid-Open No. 5-208411) is also used. be able to.

[0027]

As is apparent 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. Also, a high porosity can be maintained as a concrete slab.

[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 showing an example of a concrete slab substrate according to the present invention.

FIG. 3 is a perspective view showing a state in which a concave groove for piping is processed in the concrete slab substrate of FIG. 2;

FIG. 4 is a perspective view showing a state where piping is performed on the concrete slab substrate of FIG. 2;

FIG. 5 is a bird's-eye view showing a conventional concrete slab substrate.

FIG. 6 is a view showing an example of a concrete slab and a structure using a conventional concrete slab substrate.

FIG. 7 is a view showing an example of an embedding material.

FIG. 8 is a view showing an example of an embedding material.

FIG. 9 is a view for explaining 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: Solid embedding material,
u: concave groove, 3: concrete board

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 concrete slab substrate, characterized in that an embedding material at a place where a pipe is to be laid is solid and other embedding materials have a hollow portion. 2. The concrete slab substrate according to claim 1 is laid as necessary as a substrate of the concrete slab, and the piping member is passed through an embedding material which is a solid material of the concrete slab substrate. A method of constructing a concrete slab, comprising forming a passage, performing necessary piping work through the passage, 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.