JP3308901B2 - How to reinforce the floor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for simply and effectively reinforcing a floor in which concrete is cast on a deck plate.

[0002]

2. Description of the Related Art For example, in steel-framed warehouses and factories, it is common to use a composite slab in which concrete is cast on a metal deck plate as a floor slab. In this type of composite slab, the strength and rigidity of the floor are ensured by the deck plate used as the base material, so that the thickness of concrete can be reduced, and no formwork is required, so low cost. The floor can be constructed.

[0003]

By the way, in recent years, varieties and raw materials of distribution products have changed along with changes in the economic world, and the weight of goods stored in warehouses and factories has greatly changed accordingly. . In this case, there is no problem when the weight of the article shifts to a light weight, but when the weight shifts to a heavy weight, the strength of the existing floor (two or more floors) must be reviewed. In such a case, full-scale remodeling work to support the floor of the building with H steel from below is generally performed, but it requires a long construction period, and the operation of warehouses and factories must be stopped for a long time. In addition, the construction cost also increased. In addition, in this type of composite slab, running a forklift on the upper floor caused problems such as the sound of the traffic going downstairs and the floor vibrating. Some of these problems could not be completely solved.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has been developed in consideration of the above-mentioned problems. It is intended to provide a reinforcing method. That is, the reinforcing method of the present invention is characterized in that after a resin mortar is laid on the surface of a floor slab in which concrete is cast on a deck plate, a metal plate is laid with an adhesive resin as an adhesive layer.

According to the present invention, strength and rigidity are ensured by the metal plate laid on the floor slab. In this case, since the metal plate is laid on the floor slab via the resin mortar layer and the adhesive resin layer, even when the surface of the floor slab is not smooth, the metal plate and the floor slab are integrated, and the entire floor is actuated. The effect of increasing strength and rigidity is produced.

On the other hand, since the adhesive resin has a lower hardness than a metal plate or concrete, it prevents sound on the floor from being transmitted from the metal plate to the (existing) floor slab, and has an appropriate elasticity. The effect of attenuating and absorbing the micro vibration of the plate occurs.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a floor on which the reinforcing method of the present invention is performed, and FIGS. 2 to 4 are perspective views showing the steps. In the figure, reference symbol S denotes an existing floor slab to be reinforced, and has a structure in which concrete 2 is cast using a metal deck plate 1 as a base material. Reference numeral 3 in the figure denotes a resin mortar applied to the concrete 2. This mortar is a mortar using an adhesive resin as a binder. Here, a mortar made of epoxy resin and silica sand is used. In this embodiment, the resin mortar 3 is applied smoothly with a thickness of about 5 mm to 10 mm using a wire mesh 4 as a lath material (see FIG. 2).

Reference numeral 6 in the figure denotes a metal plate to be laid. In this embodiment, a striped steel plate or a flat steel plate is employed.
The metal plate 6 cut in advance to a predetermined size is laid on the resin mortar 3 using the adhesive resin 5 as an adhesive layer (see FIGS. 3 and 4). In this case, in this embodiment, the ends of the laid metal plate 6 are welded to each other, and then bonded between the back surface of the metal plate and the surface of the resin mortar 3 through an injection hole (not shown) formed in the metal plate. The method of injecting the conductive resin 5 is adopted.

[0009]

EXAMPLE A 6 mm thick steel plate is laid on an existing synthetic slab in which concrete of 80 mm thickness is cast on a deck plate (99 × 75 × 12), and is synthesized with a steel plate through a resin mortar layer and an adhesive resin layer. Table 1 shows a comparison table of cross-sectional performance before and after laying, assuming that the slab is integrally deformed.

[0010]

[Table 1]

As described above, when a steel sheet is laid, the strength of the floor is increased about 1.3 times and the rigidity is increased about 1.6 times. Therefore,
The allowable load per unit area of the floor is reduced by a factor of 1.3, and the amplitude for vibration is reduced to 62.5%.

[0012]

According to the present invention having the above configuration,
The strength and rigidity will be secured by the metal plate laid on the floor slab, and in this case, the metal plate is laid on the floor slab via the resin mortar layer and the adhesive resin layer,
The metal plate and the floor slab are integrated, and the strength and rigidity of the entire floor are increased.

Further, since the adhesive resin has a lower hardness than a metal plate or concrete, the sound on the floor is generated from the metal plate (existing).
Since it is prevented from being transmitted to the floor slab and has appropriate elasticity, the micro vibration of the metal plate is attenuated and absorbed.

On the other hand, the method of the present invention can be carried out entirely on the floor, and the process is only coating and laying. Therefore, the construction method is simpler and the construction cost is lower than the conventional technology in which the floor is supported by H steel. In addition, the construction period is drastically shortened (usually about one to two days), and it is possible to minimize the suspension period of the operation of the warehouse or the factory.

Furthermore, since the floor surface becomes a metal plate after reinforcement,
Floor cracks and perforations, which are likely to occur in the case of existing composite slabs, are eliminated.

Therefore, when the reinforcing method of the present invention is carried out, the weight of articles stored in a warehouse or a factory can be increased, so that the warehouse or the factory can be effectively used.

[0017] In addition, the noise and vibration of the forklift on the floor are transmitted downstairs due to the reduction of the amplitude during vibration due to the strengthening of the strength and rigidity of the floor itself, and the absorption of sound and fine vibration by the adhesive resin. In addition to increasing the speed of the forklift that has been saved up to now, work efficiency can be improved, and downstairs can be used for offices and stores, and from this viewpoint, warehouses and factories are effectively used It becomes possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a floor on which a reinforcing method according to the present invention is performed.

FIG. 2 is a partially cutaway perspective view showing steps of a reinforcing method according to the present invention.

FIG. 3 is a partially cutaway perspective view showing steps of a reinforcing method according to the present invention.

FIG. 4 is a partially cutaway perspective view showing the steps of the reinforcing method of the present invention.

[Explanation of symbols]

 S Synthetic slab 1 Deck plate 2 Concrete 5 Adhesive resin 6 Metal plate

Claims (2)

(57) [Claims] 1. A method of reinforcing a floor, comprising: laying a resin mortar on a surface of a floor slab in which concrete is cast on a deck plate, and then laying a metal plate using an adhesive resin as an adhesive layer. 2. The floor reinforcing method according to claim 1, wherein an epoxy resin mortar is laid on the surface of the floor slab in which concrete is cast on the deck plate, and then a steel plate is laid with the epoxy resin as an adhesive layer.