JPH072833Y2 - Synthetic floorboard structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a synthetic floorboard structure.

[Prior Art] Conventionally, as a composite floor board structure, a structure described in Japanese Patent Publication No. 62-6061 is known.

[Problems to be Solved by the Invention] Japanese Patent Publication No. 62-6061 discloses a PC board and a PC board using a PC board having a plurality of recessed shear cotters on its upper surface.
A technique is described which enhances the integrity with the cast-in-place concrete to be cast on the upper surface of the plate to facilitate transmission of the horizontal shearing force acting on the interface between the two.

However, this technique has a drawback in that the strength of the PC board itself is reduced if the shear cotter is formed large and deep in order to have sufficient integration.

In addition, when a shear cotter is formed, it is easy to cause damage such as chipping of the PC board surface, so when carrying it to the construction site, the chipped part falls down, etc. There is.

Furthermore, in forming the shear cotter on the upper surface of the PC board, the PC board must be formed in good timing at the time of manufacturing the PC board in consideration of the degree of curing, and there is a drawback in that the manufacturing is time-consuming and costly. There is.

[Purpose of the Invention] Therefore, the purpose of the present invention is to make the PC board and the cast-in-place concrete integral with each other at a low cost without lowering the strength, and to safely carry the PC board to the construction site. It is to provide a synthetic floorboard structure that can be laid.

[Means for Solving the Problem] The inventors of the present invention have made extensive studies in order to achieve the above object, and as a result, the present invention has been achieved.

That is, the composite floor board structure according to the present invention has an integrally-structured PC board laid in a state of being supported by beams around it, and cast-in-place concrete placed on the upper surface of the PC board as a formwork. In the composite floor board structure consisting of, as the PC board, a steel net material is attached only to the peripheral portion of the upper surface along the beam, and the one having a substantially flat upper surface central portion surrounded by the peripheral portion is used. Characterize.

Further, a preferred embodiment of the synthetic floor board structure according to the present invention is that a part of the steel net material is embedded in the PC board.

[Operation] According to the present invention, the strength of the PC board is reduced by using the steel net material attached only to the peripheral portion of the upper surface along the beam as the PC board constituting the lower part of the composite floor board. Without it, it can be integrated with cast-in-place concrete that is cast on the upper surface of the PC plate, and the horizontal shearing force acting on the interface between the two can be reliably transmitted.

If a part of the steel net material is embedded in the PC board and attached, the strength of the PC board can be further increased.

By flattening the central part of the PC plate with a small horizontal shearing force, it is easy to perform subsequent work on the PC plate, and since the flat part has no cross-section loss, the load applied on the PC plate Can bear a great deal.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway plan view showing an embodiment of a synthetic floorboard structure according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG.
The figure is a plan view showing an example of a net structure of a steel net material.

In FIG. 1 and FIG. 2, 1 is a beam whose construction has been completed, and 2 is a PC with an integrated structure laid so that the periphery is supported by the beam 1.
The plate 3 is a cast-in-place concrete which is placed on the upper surface of the PC plate by using the PC plate as a mold. In addition, 8 is a suspension hook used when laying the PC board 2.

The PC board 2 is of an integral structure with one piece per grid, and the steel net material 4 is attached only to the peripheral portion of the upper surface along the beam 1, and the center of the upper surface surrounded by the peripheral portion is substantially flat. Is formed in. As the steel net material 4, expanded metal, expanded lath, wire netting, punching metal or the like is used, and the net is formed in a corrugated shape or a herringbone (sugiaya) pattern as shown in FIG. Taking the herringbone pattern shown in FIG. 3 as an example, the size of the nets is about 75 mm in horizontal width X, about 16 mm in x, and about 10 mm in Y, and the vertical thickness is about 10 mm. Although it is about 5 to 10 mm, these numerical values are merely a guideline and needless to say change depending on various construction conditions.

Various means can be used to attach the steel net material 4 to the PC board 2. For example, in the process of manufacturing the PC board 2, the steel net material 4 is held in a partially embedded state (for example, , Attached to the streak 5 of the PC board 2)
The insert can be embedded in the PC board 2 in advance, and can be attached by driving a bolt, a screw, a nail or the like into the insert, or can be attached by driving a concrete anchor, but the most preferable is in the manufacturing process. It is to be installed with a part buried.

In this embodiment, the PC board 2 has a substantially rectangular shape, but it goes without saying that various shapes can be adopted depending on the shape of the grid surrounded by the plurality of beams 1.

After laying the PC board 2, the cast-in-place concrete 3 is cast on the upper surface of the PC board using the PC board 2 as a mold. With cast-in-place concrete 3
The horizontal shearing force acting on the interface with the PC board 2 is increased in transmissibility by the steel net material 4 attached to the PC board 2 and interposed at the interface between the two, so that a high strength composite floor board structure is obtained. In addition, 6 is an auxiliary bar fixed to the steel net material 4 to further improve the shear transmission between the PC plate 2 and the cast-in-place concrete 3, and 7 is a bar of the cast-in-place concrete 3.

[Effect] According to the present invention, as the PC plate forming the lower part of the composite floor plate, the steel net material is attached only to the peripheral portion of the upper surface along the beam, so that the PC board has a shear cotter on the upper surface. It is possible to obtain a synthetic floorboard structure having high strength and low cost as compared with the above.

Further, since there is no damage such as chipping that is likely to occur when the shear cotter is formed, it can be safely carried in and laid in the construction site.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing an embodiment of a synthetic floorboard structure according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG.
The figure is a plan view showing an example of a net structure of a steel net material. 1: Beam 2: PC plate 3: Cast-in-place concrete 4: Steel net material 5: PC plate reinforcement 6: Auxiliary reinforcement 7: Cast-in-place concrete reinforcement 8: Suspended hook

Claims (2)

[Scope of utility model registration request] 1. A composite floor board structure comprising an integrally-structured PC board laid in a state of being supported by beams around it, and cast-in-place concrete placed on the upper surface of the PC board as a formwork. In the above, as the PC plate, a steel net material is attached only to the peripheral portion of the upper surface along the beam, and the central portion of the upper surface surrounded by the peripheral portion has a substantially flat synthetic floor board structure. . 2. The synthetic floor board structure according to claim 1, wherein a part of the steel net material is embedded in the PC board.