JPH08319689A - Concrete slab board having solid embedded material, construction method for concrete slab using the slab and structure thereof - Google Patents

Abstract

PURPOSE: To facilitate the layout of utility piping. CONSTITUTION: When constructing a concrete slab by laying out a concrete slab board A between beams of a skeleton wherein an embedded material 1 made of synthetic resin expansion molded product is laid out with a specified spacing on a concrete board 3, it is necessary to use a concrete slab board A where a solid embedded material (u) is laid out as for a site scheduled for the layout of piping P at least during construction time. After a piping route is formed on the solid embedded material 1, piping work is executed and caste- in-place concrete is placed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath for a synthetic resin electric wire pipe (CD pipe) used as a shield for electric wiring, telephone wiring, etc., for water supply, hot water supply pipe, etc., inside a concrete slab of a structure. The present invention relates to a concrete slab substrate that enables easy laying of various equipment pipes 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 for concrete apartment houses are generally finished with a straight floor or a straight ceiling from the viewpoint of economy, and the various pipes described above are directly buried inside a concrete slab. It is supposed to be done. On the other hand, as a construction method for a concrete slab, as shown in FIG. 5, an embedding material 1 having a hollow portion inside made of a synthetic resin foam molded article such as expanded polystyrene, for the purpose of reducing the weight and improving the sound insulation effect. Are placed at a predetermined interval on the concrete substrate 3 having the truss streaks 2 during the curing process in which the concrete is uncured and locked by the locking tool, and the embedding material 1 is cured by hardening the concrete. Using a substrate A for hollow concrete slab, which is fixed and fixed to a concrete substrate 3,
This concrete slab substrate A is carried into the construction site, and as shown in FIG. 6, the required number of the slab substrates B and B are arranged between them and the slab upper end streak 4 and the like are attached, and then the cast-in-place concrete C is placed. A construction method in which a so-called hollow concrete slab CS is constructed by casting is widely used. 7 and 8 show an example of the embedding material 1, which has a box-shaped (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 released inside. It has a plurality of hollow portions S having a relatively large bottom area (Japanese Patent Publication No. 57-47).
(See Japanese Patent Publication No. 008). The hollow portion S is provided for the purpose of reducing the weight of the embedding material 1 and saving the material.

Then, in performing the burying work of the pipe as described above in the concrete slab CS using the burying material 1 as described above, as shown in FIG. 9, between the burying material 1 and the burying material 1. The above-mentioned equipment pipe P is arranged in the space SS for filling the cast-in-place concrete formed in 1, and the cast-in-place concrete is poured from above. for that reason,
It is inevitable to take a detour for piping between the two target points, and a piping distance longer than originally necessary is required. In addition, the amount of concrete to be placed is reduced by the volume occupied by the pipes.

It has also been proposed to construct a concrete slab by using a concrete slab substrate in which an embedding material having a groove on the upper surface is arranged, and the cast-in-place concrete flows into the recess and solidifies. As a result, the anti-vibration effect of the concrete slab is increased and the concave groove can be used for piping (Jitsuko Sho 60-3224).
No. 8).

[0005]

When the number of pipes to be buried in the concrete slab is small, the increase in the pipe distance has a small effect on the construction cost, and there is no particular problem. Also, even if a pipe is placed in the space for filling the cast-in-place concrete between the potting material and the cast-in-place concrete is placed from above, the cast concrete will spread densely in the space. Since it is possible to reduce the amount of cast concrete, the concrete slab does not cause a significant cross-section loss.

However, in concrete-type apartment houses constructed in recent years, in addition to the conventional piping for electricity and telephone lines, wiring for satellite broadcasting, cable broadcasting, etc., piping for wiring for home security equipment, and Various pipes such as pipes for water supply and hot water supply pipes are being buried in concrete slabs, and there is a tendency for each room to have its own outlet. , The number of branches required for distribution of electricity, water, etc. is increasing, and the piping distance is also increasing.

For this reason, as shown in FIG. 9, a large number of pipes P are arranged in the concrete filling space SS, and if sufficient attention is not paid at the time of pouring the cast-in-place concrete, the space P will be filled. In SS, concrete may not densely enter and a void may be formed between the pipe P and the pipe P. Also, since the amount of concrete to be placed is reduced, sufficient construction management is required from this aspect as well. Furthermore, arranging a large number of pipes while circumventing the concrete-filling space portion formed in a grid shape requires a lot of work, and also increases the pipe distance.

In a piping work at a site where a concrete slab substrate having an embedding material having a hollow portion is laid on the entire surface, the embedding material is partially cut or grooved to form a passage for the piping. , It is partly done to shorten the piping distance by piping through the passage,
When cutting or grooving an embedding material with a hollow part, the processed surface may be connected to the hollow part. There is a risk that the cast-in-place concrete will enter the hollow part and the weight of that part will become excessive. This reduces the porosity of the concrete slab.

Further, in the concrete slab substrate disclosed in Japanese Utility Model Publication No. 60-32248, all the embedding materials to be arranged have concave grooves on the surface, and the concave grooves are used for piping. Even so, since the proportion of the piping area in the total area of the concrete slab is small, when looking at the concrete slab as a whole, as a result, the porosity is reduced by the amount of the concave groove, so a concrete slab with a higher porosity is sought. Has been.

An object of the present invention is to eliminate the above-mentioned problems that occur when a large number of equipment pipes are embedded in a concrete slab having an embedding material made of a synthetic resin foam molded product inside. In particular, in particular, it is possible to arrange a large number of pipes reliably and easily, at the same time, a concrete slab substrate capable of maintaining a high porosity and a method of constructing a concrete slab using the substrate, It is to provide a structure having such a concrete slab substrate.

[0011]

One embodiment of a concrete slab substrate according to the present invention for solving the above problems is that a solid embedding material made of a synthetic resin foam molded article is provided on a concrete substrate. It is characterized by being arranged at intervals. Another aspect of the concrete slab substrate according to the present invention is a concrete slab substrate in which embedding materials made of a synthetic resin foam molded product are arranged at a predetermined interval on the concrete substrate. It is characterized in that the embedding material at the place where the piping is to be laid when constructing the concrete slab using the circuit board is solid, and the other embedding materials have a hollow part. .

The present invention provides a method for constructing a concrete slab using the above concrete slab substrate, in which the concrete slab substrate according to any one of the above-described embodiments is laid as a substrate of the concrete slab, and the Forming a passage for passing a piping member in the embedding material portion which is solid for the concrete slab substrate, and performing the necessary piping work by passing through the passage, after that,
Disclosed is a method for constructing a concrete slab, which comprises pouring in-place concrete from above.

The present invention also discloses a structure having the above-mentioned concrete slab substrate as a substrate for the concrete slab.

[0014]

[Operation] According to the concrete slab substrate of the present invention, regardless of the aspect of the concrete slab substrate, the formation of the pipe passage or the concave groove in the embedding material at the construction site is solid. This is done for some embedding materials. As a result, as in the case of cutting an embedding material with a conventional hollow part, a communication hole to the hollow part is formed at the time of forming a passage for a pipe or a concave groove, and the cast-in-place concrete enters the embedding material inside. However, lowering the porosity can be avoided. Further, since it is solid, the operator can easily form the concave groove or the passage in any direction, and in particular, for the concrete slab substrate in which all the embedding materials are solid. In this case, it becomes possible to promptly respond to a case where the piping arrangement at the construction site is changed.

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. Further, when a plurality of pipes are arranged in parallel, it is possible to surely and easily form a passage or a groove having a width required for the pipes. After finishing the necessary piping, if necessary, perform the same work as the conventional method such as attaching the slab upper end streak, and pour in-place concrete. Since the pipe is inserted into the formed passage or groove, the height of the upper end of the pipe is almost the same as the height of the embedding material with the surrounding hollow part. The same can be performed as in the case of the conventional concrete slab substrate.

In the concrete slab on which the substrate for concrete slab according to the present invention is laid, it is possible to avoid concentrating a large number of pipes in the space SS for in-place concrete filling as in the prior art. Insufficient integration of cast-in-place concrete and concrete substrate and generation of voids due to equipment piping in the space can be avoided. Also, when placing a pipe that has the same hollow part as the embedding material used for the conventionally known concrete slab substrate as the embedding material that is not placed on the top surface, the porosity of the entire concrete slab is Can also be kept high.

[0017]

The present invention will be described in more detail based on the following examples. FIG. 1 is a plan view schematically showing an example of a concrete slab CS portion of a structure in which a concrete slab substrate A is arranged between the beams B and B of a frame as shown in FIG. 6, for example. In FIG. _5, five concrete slab substrates A (A _{1 to} A ₅ ) are arranged.
In this concrete slab CS, a pipe box V ₁ is attached to a _second concrete slab substrate A ₂ as shown in the drawing, and from there, toward the outlets 21, 22, 23 provided on the three side walls. , Various facility pipes P1, P2 for electric wires or for water as described above,
It is designed so that P3 is placed, and the piping boxes V ₂ and V ₃ are also attached to the fourth concrete slab board A ₄ and the fifth concrete slab board A ₅ for both pipes. Piping P between boxes V ₂ and V ₃
It is designed to connect with 4. An embodiment of the present invention will be described below by taking the case of constructing a concrete slab according to these design conditions as an example.

In this case, when manufacturing the concrete slab substrates A _{1 to} A ₅ in the factory, the following five different structures are prepared. In this embodiment, as shown in the drawing, during the piping work at the construction site, in the concrete slab substrate A ₁ , the embedding material x indicated by the diagonal lines located in the third column from the right in FIG.
The pipe P2 passes through the portions 1 to x3. Therefore, when manufacturing this concrete slab substrate A _{1 in} a factory,
Solid embedding materials 1u made of synthetic resin foam are arranged and fixed in the portions of the embedding materials x1 to x3 indicated by diagonal lines, and the other portions are standardized as shown in FIGS. 6 and 7, for example. The embedding material 1 having a hollow portion is arranged and fixed.

In the concrete slab substrate A ₂ , as shown in the drawing, two embedding materials x4 and x5 shown in the third row from the right and shaded, and the embedding material x5 are located on the left and right sides. The four embedding materials x6 to x9 are connected to the pipe P1,
P2 and P3 pass. Therefore, when manufacturing the substrate A ₂ for concrete slab, five embedding materials x indicated by diagonal lines are used.
The solid embedding material 1u was arranged and fixed in the portions 5 to x9, and the portion (x4 portion) to which the piping box V ₁ was attached was cut according to the shape of the piping box V ₁ if necessary. The embedding material 1u having a shape is arranged. The embedding material 1 having a standardized hollow portion as shown in FIGS. 6 and 7, for example, is arranged and fixed to the other portions.

In the concrete slab substrate A ₃ part,
As shown, there are no plans to lay the plumbing. Therefore, as for the concrete slab substrate A ₃ , the embedding material 1 having a standardized hollow portion is arranged and fixed over the entire surface of the concrete substrate, as in the conventional case. In the concrete slab substrate A ₄ , as shown in the figure, an embedding material x1 indicated by two diagonal lines from the top in the fourth row from the right.
In the concrete slab substrate A ₅ , the lowest embedding material x12 in the third column from the right and the two embeddings indicated by the diagonal lines in the middle from the right in the second row from the right in the concrete slab substrate A5. The pipe P4 passes only through the inserts x13 and x14.
Therefore, in the concrete slab substrate A ₄ , the solid embedding material 1u is arranged and fixed in the embedding material x10 portion,
For concrete slab A ₅ , embedding material x1
A solid embedding material 1u is arranged and fixed in the portions 2 and x14. In addition, the embedding material x11 portion and the embedding material x13 portion,
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. Then, the embedding materials 1 ... Having a standardized hollow portion as shown in FIGS. 6 and 7, for example, are arranged and fixed to the other portions.

The above-mentioned substrate A for concrete slab
_{1 to} A ₅ are the same as in the case of the conventional concrete slab substrate disclosed in, for example, Japanese Patent Publication No. 57-47008, except that the solid embedding material 1u is arranged and fixed at a specific position. Manufactured. When constructing concrete slabs, multiple types of concrete slab substrates (A _{1 to} A ₅ ) manufactured at the factory as described above are batch-processed in accordance with the piping design situation in the concrete slab in each dwelling unit or each floor. Then it is brought to the construction site of the structure. At the construction site, after placing the boards for concrete slabs of different shapes between the beams B and B of the frame according to the design drawing, a passage (recessed groove U in this example) necessary for piping is provided in the solid embedding material 1u. The pipes are formed and the predetermined pipes P1 to P4 are arranged while passing through the recess U. The construction of the concrete slab is completed by arranging the upper slab reinforcements and the like in the same manner as in the conventional method, and then pouring 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 attached corresponds to the shape of the piping box V. The embedding material 1u in a cut form is arranged, and the solid embedding material 1u (indicated by a chain double-dashed line in the figure) is arranged also in a portion where piping is planned. Then, the remaining embedding material is the embedding material 1 having a hollow portion. The concrete slab substrate of this aspect is a preferable aspect because it can be made lighter only by using an embedding material having a hollow portion in a portion not requiring piping.

FIG. 3 shows that when the concrete slab is constructed,
It is a state in which an operator has formed a concave groove U for piping on a concrete slab substrate having such a structure laid on the frame, and one concave groove U and two concave grooves U are formed depending on the situation of the pipe. Various types of concave grooves are formed such as U or a concave groove U ₂ having a width of two pipes. The concave groove U preferably has a depth of about the pipe diameter of the pipe. Further, when a plurality of pipes are planned to be arranged in an intersecting manner, by forming a groove having a depth capable of intersecting, the upper surfaces of all the embedding materials are made substantially flush with each other after the piping. Can be FIG. 4 is a view showing a state after piping, in which two pipes are passed in parallel in the concave groove U ₂ .

Although not particularly shown, it will be understood that the initial object of the present invention can be achieved even when the embedding material to be placed on the concrete substrate is composed entirely of solid embedding material. . When the concrete slab substrate of this aspect is used, the weight reduction of the concrete slab is hindered to some extent, but since the degree of freedom for forming the recessed groove or passage for piping in the embedding material is increased, the construction site It is possible to flexibly cope with the case where it is expected that the piping situation needs to be changed.

As can be seen from the above description, according to the present invention, it is necessary for the equipment to be placed in the space for filling the cast-in-place concrete which is conventionally formed between the potting materials. By using the concrete slab substrate according to the present invention, it is possible to lay the pipe through the upper surface of the embedding material 1u with a short piping distance. In addition, even though the piping work is performed while forming the piping passages (concave grooves, etc.) necessary for the embedding material on-site, it is the solid embedding material that is processed on-site. Damage to the inserts is kept to a minimum. In addition, when the embedding material other than the place where piping is planned is an embedding material with a hollow part, the decrease in the porosity of the concrete slab can be minimized, and the weight reduction of the concrete slab is also sufficient. In addition to the above, the purpose of reducing the weight of the embedding material and saving the material can 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 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 used for the hollow portion S. An embedding material (see Japanese Patent Laid-Open No. 5-208410) having an opening for pulling it out can also be effectively used. Furthermore, the mounting of the embedding material on the concrete substrate is also limited to the one that is attached by the locking tool in the state where the conventional concrete is uncured. In the state where the concrete is uncured, a reactive adhesive such as urethane adhesive is used. A method of adhering and fixing with an agent or the like, or a method of adhering with a fastener such as a concrete nail after hardening of concrete, an adhesive, an adhesive tape or the like (see Japanese Patent Laid-Open No. 5-208411) be able to.

[0027]

As is apparent from the above description, by using the concrete slab substrate according to the present invention,
Piping work when constructing a concrete slab becomes easy and the piping distance can be shortened. In addition, a high porosity can be maintained even as a concrete slab.

[Brief description of 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 where a groove for piping is processed on the substrate for concrete slab of FIG.

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

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 substrate for concrete slab.

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

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

FIG. 9 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 ... Solid embedding material,
u ... concave groove, 3 ... concrete substrate

Claims (4)

[Claims] 1. A substrate for a concrete slab, in which solid embedding materials made of a synthetic resin foam-molded product are arranged on a concrete substrate at predetermined intervals. 2. A concrete slab substrate in which an embedding material made of a synthetic resin foam-molded product is arranged at a predetermined interval on a concrete substrate, which is used when constructing a concrete slab using the concrete slab substrate. Substrates for concrete slabs, characterized in that the embedding material at the place where the pipe is to be laid is solid, and the other embedding material is said to have a hollow portion. 3. A concrete slab substrate, wherein the concrete slab substrate according to claim 1 or 2 is laid as required, and a pipe member is passed through a solid embedding material of the concrete slab substrate. To form a passage for
A method for constructing a concrete slab, which comprises passing the inside of the passage to perform a necessary piping work, and then pouring a cast-in-place concrete on the pipe. 4. A structure having the concrete slab substrate according to claim 1 or 2 as a concrete slab substrate.