JPS6016542B2 - Concrete slab construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing a concrete slab, which allows for extremely easy construction and provides good construction results.

BACKGROUND ART In recent years, with the development of high-rise buildings, issues such as reducing the weight of building materials, industrializing building materials, lowering transportation costs, and saving labor in equipment piping have been raised.

Therefore, the construction method for reinforced concrete slabs used as flooring and ceiling materials in buildings is to increase the thickness of each slab to increase its strength, and to hollow out the interior to reduce weight and improve sound insulation. Various methods have been put into practical use. Specifically, in order to create hollows, steel plates are used as hollow boxes in concrete, steel pipes, slate pipes, concrete pipes are used, and water-resistant cardboard forms are used. Construction methods have been developed for use as embedding materials. However, both construction methods have drawbacks in terms of productivity, such as the need for labor and labor to manufacture the embedding material to make it hollow.Also, even if hollow boxes made of iron plates and embedding materials made of various pipes can be made hollow, it is difficult to make them. Due to its own weight, further improvements are needed in terms of weight reduction, and there are also difficulties in transportation.

Furthermore, even if water-resistant cardboard embedding materials have been treated to be waterproof, they are still made of cardboard, so they have the disadvantage of being easily deformed during construction in the rain. It was very troublesome. In addition, this corrugated cardboard embedding material easily absorbs water, and the corrugated cardboard swells and deforms, so there is a risk that cracks will occur in the concrete after the shell is cast. In addition to the various embedding materials mentioned above, synthetic resin foams have also been used as embedding materials that are lighter than these and embedded in concrete (for example, on public floors). 50-27
138 Utility Model Publication No. 52-4434), all of them lacked the stability and simplicity required for slab construction as a fixing cut of foam. Therefore, in this invention, compared to the conventional technology using each of the above-mentioned embedded materials, it is possible to reduce the weight, improve cross-sectional performance (cross-sectional strength), and blue-shielding performance, and realize a far superior construction as a heat insulating slab. Furthermore, an embedding material made of a synthetic resin foam molded product can be easily and reliably attached to a concrete slab substrate, so that the concrete slab can be constructed.

That is, the feature of this invention is that a part of the anchor for attaching the embedding material is buried in the concrete substrate in advance, and then the embedding village, which is made of a synthetic resin foam molded product and has a space on the bottom side, is solidified. A method of constructing a concrete slab, in which the embedded material is connected to the concrete substrate using the above-mentioned anchors and fixed, and then concrete is poured to form the upper layer of the concrete slab. Exists.

Next, embodiments of the present invention will be illustrated below with reference to the drawings.

A is an embedding material made of a synthetic resin foam molded product with closed cells, such as polystyrene foam, and has a thick shape to promote material savings and lightening of construction. Therefore, a box-shaped one with a space a formed on the bottom side or a box-shaped one with a penetrating space a' formed therein is used.

To install the embedding material A, first pour and cast concrete to the required thickness to form the concrete substrate C of the lower layer of the slab. Bury some of it,
Leave the other parts of anchor D outside (see Figure 1)
. Then, the embedding material A made of a synthetic resin foam molded product is placed on the solidified concrete base C, and the embedding material A is connected to the concrete substrate C using anchors D, which will be described in detail later, and fixed. (See Figure 2). Anchor D used in the above installation work is as follows:
There are wires, bands, and other various structures and types, all of which are partially embedded in the concrete substrate C. To give a few preferred examples, the bottom or side surface of the embedded material A is (see Figures 1 to 3 and 4), and one that can be bent to press down the stepped part 1 when there is a stepped part 1 in the embedding village A (see Figures 1 to 3 and 4). (see Figure 5), one that can be bent so that it can be pressed down from the top surface of the embedding material A (see Figure 6), and one that can be bent so that it can be pressed down from the top surface of the embedding material A, etc. Something that can be pierced (see Figure 7), anchor ○
, D (see Fig. 8), etc., and any anchor ○ that can attach and fix the embedded material A can be used without being limited to the above-mentioned examples.

The installation work of the above-mentioned embedding material A is suitable for construction at a construction site, and is not only suitable for installation work on a single concrete substrate C, but also on concrete substrates C and C as shown in Fig. 3 etc.
It is also possible to attach and fix the embedding material A so as to straddle the connection point between the two.

In addition, it is also possible to install and fix embedding material A to form a unitized concrete substrate with embedding material by using formwork off-site, and then pouring the concrete that will become the upper layer of the concrete slab. It is. In addition, after the above-mentioned embedding material A is attached and fixed to the concrete substrate C,
When the entire concrete slab is used for construction, construction workers will often walk on the embedded material A, so the embedded material A should have a more reinforced structure.
A reinforcing structure with a wire mesh 2 or something else buried inside (see Figure 9), or a reinforcing structure with a plywood board, a vinyl chloride board, a steel plate or other pressure plate 3 bonded to the top side to distribute the load. In addition to this case (see FIGS. 10 and 11), it is also possible to use a non-foamed resin or a low-foamed resin so that only the upper layer can be reinforced while being integrated, so that it can be reinforced.

In either case, due to the reinforced structure of the synthetic resin foam molded product that forms the embedded village A, if it is difficult to pierce the anchor from the top, for example, it may be possible to pierce from the side, or from the bottom. Installation may be carried out using structurally usable anchors, such as anchors. In addition to polystyrene foam, the synthetic resin foam molded product that forms embedded village A may also be made from foams made from polyethylene, polypropylene, polyvinyl chloride, copolymers based on these, etc. The shape thereof is not limited to that shown in the drawings, and can be implemented in various ways. In addition, it is convenient to install reinforcing bars on the concrete substrate C in advance for use in concrete slab construction, and these reinforcing bars include:
In addition to the reinforcing bars b to be buried, a bifurcated leg-shaped village b' partially buried in the concrete substrate C and a horizontal connecting punch b'' in which the leg-shaped punches b'b' are connected by welding, fasteners, etc. Although it is preferable for construction to use a reinforcing bar consisting of, it is also possible to use other reinforcing bars.

The concrete substrate C, which is integrated with the embedded material A made of the foam molded product described above, is used for constructing concrete slabs for buildings.
Concrete 〇, which will become the upper layer of the slab, is placed on top and integrated with the lower concrete substrate C, so that the embedding material A is embedded in the slab (see Figure 12).

Incidentally, after assembling connecting reinforcements or arranging upper reinforcements on the concrete substrate C as necessary, it is also possible to pour the concrete C' which will become the upper layer of the slab. According to this invention, as already mentioned, a part of the anchor D for attaching the embedded material is embedded in the concrete substrate C in advance, and then the embedded material is made of a foam molded product of synthetic resin and has a space on the bottom side. The village A is placed on the solidified concrete substrate C, and the embedded village A is connected and fixed to the concrete substrate C using the anchor D, and then the concrete that will become the upper layer of the concrete slab is poured. Because of this construction method, the embedded material A can be firmly fixed. Therefore, embedding material A
If used for concrete slab construction after installation, there will be no horizontal displacement due to pouring force when concrete is placed as the upper layer, and the embedded village A will be firmly established. This will greatly improve your sexuality. Furthermore, according to the concrete slab construction method of the present invention, even if the embedded material A is installed off-site, since it is integrated with the concrete substrate C when used for concrete slab construction, it cannot be used separately with a hot water meter. The operational efficiency of hot water equipment can be much improved compared to when the water is delivered to a construction site.
Furthermore, since the concrete slab obtained by this invention has the embedding material A made of a synthetic resin foam molded product buried therein, it can significantly reduce the amount of concrete used for pouring, and also In comparison, it is possible to promote much lighter weight and improve transportability.

In addition, this embedding material A has no water absorbency, can be used without any problem even in rainy weather, and can also be improved in terms of heat insulation, sound insulation effect, and cross-sectional performance (cross-sectional strength). Moreover, since foamed molded products with a cellular structure are used as embedding materials, it is similar to a embedding village made of cardboard. Concrete that is useful for constructing concrete slabs with sufficient strength, as there is no risk of deformation, and it is suitable for preventing cracks in the concrete after placement even after use in concrete slabs. Slabs are now available. In addition, since a foam molded product with a space on the bottom side is installed and fixed as an embedding material, the material can be saved by that space. This space of the embedded material fixed on the substrate can be used, and it is also useful for saving labor in equipment piping. In addition, in this invention, a synthetic resin foam molded product, which has a simple structure and is easy to manufacture by molding, etc., can be used as an embedding material, and can be used as an anchor that is partially embedded in the concrete substrate. Because it can be firmly connected and installed, it is easy to install and can be provided as a concrete slab with embedded material at a low cost.

Furthermore, since this invention places the embedding material on a solidified concrete base and then pours concrete, if the concrete base with anchors embedded in it is manufactured in advance at a factory etc., the concrete base can be placed on-site. There is no need for curing, and the embedded material can be placed immediately, simplifying on-site work and allowing for much faster construction.

[Brief explanation of the drawing]

The figures illustrate embodiments and usage examples of the present invention. Figures 1 and 2 are cross-sectional views during construction, Figure 3 is a cross-sectional view showing modified examples of construction, and Figures 4 to 4 are cross-sectional views showing modified examples of construction. Figure 8 “1 each
and 2 are cross-sectional views showing various methods of attaching and fixing embedded materials using anchors during construction, 1. Figures 9 to 11 are cross-sectional views showing examples of reinforcing embedded structures, and Figure 12 is a cross-sectional view of a concrete slab. FIG. A...embedding material, a, a'...space, 1...step part,
2...wire mesh, 3...pressure plate, b, ke, b''...reinforcing bar,
C... Concrete board, D... Anchor. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 9 Figure 10 Figure 8 Figure 11 Figure 12

Claims (1)

[Claims] 1. A part of the anchor for attaching the embedded material is embedded in advance in a concrete substrate, and then the embedded material made of a synthetic resin foam molded product and having a space on the bottom side is solidified. A concrete slab, characterized in that it is placed on a concrete substrate, the embedded material is connected and fixed to the concrete substrate using the anchor, and then concrete is poured to form the upper layer of the concrete slab. construction method. 2. The method for constructing a concrete slab according to claim 1, in which the anchor for attaching the embedded material is one that can pierce the embedded material. 3. The anchor for attaching the embedded material is one that can be bent so that it can be held down against the embedded material.
Concrete slab construction method described in section. 4. The method for constructing a concrete slab according to claim 1, wherein the anchor for attaching the embedded material is one that can be bent so as to press down on the embedded material and can be pierced. 5. A method for constructing a concrete slab according to claim 1, using an embedded material having an internally reinforced structure. 6. The method of constructing a concrete slab according to claim 1, using an embedded material having a reinforced structure on the upper surface side. 7. The concrete slab construction method according to claim 1, wherein reinforcing bars are erected on the concrete substrate.