JP2000234409A - Construction method for concrete slab and imbedding member used for construction thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components of mounting materials to promote cost reduction and, at the same time, to further facilitate the construction by properly imbedding imbedding members in the middle of a concrete layer. SOLUTION: An imbedding member A is set to a concrete casting stripping temporary form 1 to cast concrete. A core 2 inserted into the imbedding member A and capable of rising with the floating of the imbedding member A is inserted into the stripping temporary form 1 to connect, at the same time, a stopper 20 is provided to the lower end or in the vicinity thereof so as to make it possible to control a rising position of the core 2, and the imbedding member A as well as the core 2 is floated up to a specific position controlled by the stopper 20 to imbed the imbedding member A in the middle part of thickness in a concrete layer. Then, the imbedding member A is equipped with the core 2 capable of being inserted into the concrete casting stripping temporary form 1 to connect, the core 2 is inserted into the imbedding member A, and the imbedding member A is so provided that it can be floated together with the core 2 by casting concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a concrete slab in which an embedding material can be embedded in the middle of a concrete layer and an embedding material used for the construction.

[0002]

2. Description of the Related Art Conventionally, as a concrete slab construction method for embedding an embedding material in a concrete layer, a fixing member and a supporting member together with the embedding material can be surrounded by concrete. The method described above is adopted, and a concrete slab construction method according to Japanese Patent Publication No. 2-41614 can be exemplified.

[0003] In this construction method, the embedding material has been previously fixed in a state of being slightly lifted from the demolding temporary form by a fixing member or a support, and the concrete has been driven. Also,
There has also been proposed a device in which an embedding material is prevented from floating from a support position during concrete driving (for example, Japanese Utility Model Application Laid-Open No. 61-20642). As described above, conventionally, it has been considered that the embedding material is positioned beforehand so that the embedding material does not float from the support position before being driven into the field.

[0004] That is, when the concrete is poured, the embedding material is apt to receive an acting force in the floating direction unless the embedding material is firmly fixed by the poured concrete. Therefore, the present inventor has focused on utilizing the acting force for lifting the embedded material at the time of concrete driving, instead of suppressing the acting force as in the past, and focused the embedded material on the concrete layer. An application for the purpose of properly embedding in the middle was filed earlier (Japanese Patent Application No. Hei 10-366689).
No.), this time, we have made further improvements to reduce the number of parts of the mounting materials compared to the earlier application, to promote cost reduction and to make the work easier.

[0005]

As described above, according to the present invention, an embedding material can be properly embedded in the middle of a concrete layer. In the method of setting the embedding material to the temporary release form for concrete and driving in concrete, the core material that has been inserted into the embedding material and can rise with the floating of the embedding material A stopper is provided at the lower end or near the lower end of this core material to control the ascending position of the core material. The embedding material is embedded in the middle of the concrete layer by embedding the embedding material in the middle of the concrete layer by using the concrete driving force. Becomes ability Yes as floating position of the filler material by implantation of the concrete is determined, floating position is can be kept constant.

Further, as an embedding material used in the construction method of the present invention, as described in claim 2, an embedding material provided with a core material that can be inserted and connected to a temporary mold release mold for concrete driving. The core material is inserted into the embedding material, and the embedding material is provided so as to be able to float with the core material by driving in concrete. An embedding material that can reliably float with a core material inserted and connected to a frame can be provided.

Further, as described in the third aspect of the embedding material, the embedding material has a stopper which regulates the ascending position of the core material at or near the lower end of the core material which can be entrained as the embedding material floats. The feature is that the rising position of the core material that rises with the embedding material is regulated, the rising position of the embedding material that rises with the core material is determined, and the rising position is constant and stable. Will be able to

[0008] If the embedding material is provided with a concave-convex portion for fitting the embedding material on the longitudinal side surface as described in claim 4, the embedding material is connected laterally at the time of construction. The connection at the time of juxtaposition can be stabilized. In addition, if the embedding material is provided with an interlocking connection portion for connecting the embedding materials at the longitudinal end face as described in claim 5, the embedding materials are connected in the longitudinal direction at the time of construction. And help stabilize the connection.

[0009] In addition, when the concrete is poured, the inclination of the embedding material due to the impact of the embedding is minimized, and the embedding material can be floated while securing the positions of the embedding materials. In addition,
The embedding material can be connected to each other in the horizontal direction or the vertical direction by only one of the vertical and horizontal sides in practice, but it is preferable to perform both in the vertical and horizontal directions in practice. The embedding material described above is characterized in that, as described in claim 6, the bottom surface of the embedding material that can be floated is formed to be flat. Since the rotation of the embedding material does not occur on the flat bottom surface even when an operator walks on the top, the bottom shape is suitable for stabilization, which is preferable in practice.

[0010] Further, the embedding material is characterized in that the embedding material that can float is formed of a synthetic resin foam as described in claim 7, so that the weight can be reduced as voids in the concrete layer. What can be achieved and what is preferred can be provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment according to the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment. FIG. 1 shows a state before concrete is poured, and FIG. 2 shows a state after concrete is poured. FIG.
Reference numeral 1 in FIG. 2 denotes a wooden demoulding temporary formwork for concrete driving laid at the destination.

Further, in FIG. 1, reference numeral 2 denotes a core material inserted through the embedding material A, and a lower end portion of the core material 2 is inserted and connected to the temporary mold release mold 1 so as to be embedded therein. A stopper 20 is provided at the lower end (which may be near the lower end) so that it can be entrained with the material A. When the core material 2 rises together with the embedding material A, the stopper 20 is provided. Is expanded and stopped at the position of the temporary mold release mold 1, and the rising positions of the core material 2 and the embedding material A are regulated. 21 is the core material 2
The core material 2 is provided together with the embedding material A by a holding plate provided so as to be integrated with the upper end of the material.

Note that F in FIG. 1 (FIG. 2) shows a reinforcing bar arranged. As described above, the core material 2 inserted into the embedding material A is inserted into and connected to the demolding temporary mold 1 for the concrete releasing mold frame 1 for concrete driving, and the embedding material A is demolded. Set on the temporary formwork 1. When the concrete C is driven from the state where the core material 2 is inserted into the embedding material 1 (FIG. 1), the embedding material A is lifted by the concrete driving force as the concrete C is driven. .

More specifically, the embedding material A rises with the core material, and the stopper 20 of the core material 2 is
As a result, the rising of the embedding material A is regulated at a position in the middle of the concrete layer (see FIG. 2). Furthermore, the embedding material A is embedded in the middle of the thickness in the concrete layer C by the concrete implantation, and a concrete slab containing the embedding material A can be formed by casting in place.

As shown in FIG. 3, the embedding material A has concave and convex portions 30, 3 for fitting the embedding material with each other on the side surface in the longitudinal direction.
0 ′ (for example, about 225 in diameter × about 12 in length)
.. Are suitable for stable connection when the embedding materials A, A,... Are arranged side by side in the lateral direction, and as shown in FIG. Parts 40, 4
By providing 0 ', it is possible to stabilize the connection of the embedding materials A, A... In the vertical direction.

Further, as shown in FIG. 5, the embedding material A has a flat bottom surface a as shown in FIG. The formed one is preferable, but not limited to this, and a columnar or substantially columnar one is used by being turned sideways. The material of the embedding material A is preferably a foam of expanded polystyrene or other synthetic resin, but is not limited thereto, and a known hollow embedding material may be used.

Next, FIG. 6 shows a second embodiment of the core material 2. The stopper 20 ′ of the core material 2 is inserted into the embedding material A or the temporary mold release mold 1, and then the nut 2 is removed. FIG. 7 shows a case in which the core material 2 is easily removed from the embedding material A together with the removal of the temporary mold 1 after the concrete is poured. The case where it is provided in the middle is shown, and when removing the mold release temporary form after concrete casting and removing it, it is possible to save the trouble of cutting off the lower part of the core material 2 and after removing the core material 2 Will bury a spacer (not shown).

[0018]

As described above, according to the construction method of the present invention, it is possible to embed an implanted material at a predetermined position in a concrete layer by effectively utilizing the floating of the embedded material accompanying the concrete implantation. Thus, a concrete slab can be constructed at low cost and in a short time at a site or in a factory, and a concrete slab can be easily provided.

In addition, the embedding material used in the construction method of the present invention is obtained by merely setting the core material by inserting the embedding material into the embedding material. An easy-to-install one can be provided.
Further, with respect to the regulation of the floating position of the embedding material, the floating position of the embedding material can be made accurate and constant and stable by forming a core material with a stopper.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view before concrete casting.

FIG. 2 is a sectional view at the time of placing concrete.

FIG. 3 is a plan view before embedding where embedding materials are juxtaposed.

FIGS. 4 (a) and 4 (c) are a front view and a rear view showing a longitudinal end face of an embedding material, and FIG. 4 (b) is a plan view.

FIG. 5 is a front view showing a modified example of an embedding material.

FIG. 6 is a sectional view showing a modified example of a core material.

FIG. 7 is a sectional view showing a modified example of a core material.

[Description of Signs] A Embedding Material 1 Demolding Temporary Form 2 Core Material 20 Stopper 30, 30 'Embedding and Unsealing Parts for Embedding Material 40, 40' Embedding Portion for Connecting Embedding Material

Claims (7)

[Claims] In a method of setting an embedding material on a demolding temporary form for concrete implantation and embedding concrete, the method is inserted into the embedding material, and the floating of the embedding material is performed. A core material that can be raised together is inserted and connected to the temporary mold release mold, and a stopper is provided at the lower end or near the lower end of the core material that can regulate the rising position of the core material. A method for constructing a concrete slab, comprising: floating an embedding material together with a core material to a predetermined position regulated by a stopper, and embedding the embedding material in the middle of a thickness in a concrete layer. 2. An embedding material provided with a core material that can be inserted and connected to a demolding temporary formwork for concrete driving, wherein the core material is inserted into the embedding material. An embedding material, wherein the embedding material is provided so as to be able to float with the core material by driving in concrete. 3. An embedding material is provided with a stopper for restricting a rising position of the core material at or near a lower end of the core material which can be entrained as the embedding material rises so that the floating position of the embedding material can be regulated. 3. The embedding material according to claim 2, wherein: 4. The embedding material according to claim 2, wherein the embedding material is provided with a concave / convex portion for fitting the embedding material with each other on a longitudinal side surface. 5. The embedding material according to claim 2, wherein the embedding material is provided with an interlocking portion for connecting the embedding materials to each other at an end face in the longitudinal direction. 6. The embedding material according to claim 2, wherein the bottom surface of the embedding material that can float is formed flat. 7. The embedding material according to claim 2, wherein the embedding material that can float is formed of a synthetic resin foam.