JPH09137540A - Manufacture of lightweight composite floor board and execution method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exhibit structural performance equal to or more than a customary floor board, and make a lightweight composite floor board to be excellent in sound insulation and fire resistance. SOLUTION: A lightweight bottom plate B made of a lightweight concrete slab, an ALC board, or a fire resistance board is fitted to the rearside of the chord member of a built-up reinforcement truss A, and after fitting a closing plate C provided with vertical ribs in a line to the circumferential part of the bottom plate B, the upper face is closedly covered with a sheet to which hard foam resin is not stuck. A hollow part formed between the sheet, the bottom plate B, and the closing plate is filled with hard foam resin, so as to integrate the bottom prate B with the built-up reinforcement truss A, and then the upper sheet is removed. Recessed and projecting parts are provided on the surface of the hard foam resin of the formed partially fabricated floor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method and a construction method for a lightweight synthetic floorboard of a building.

[0002]

2. Description of the Related Art A building must have a floor, except for special purposes, and its area is huge. The functions of the floor are: (a) Supporting vertical loads, preventing vertical obstacles, and providing a comfortable living space. (B) Improve the deformability of the building during an earthquake due to the in-plane rigidity of the floor. (C) By integrating the beam and the floor, the beam can be evaluated as a T-shaped cross section, thus increasing the rigidity of the beam with respect to a vertical load and improving the habitability. (D) The sound of the upper and lower floors is blocked and the habitability is improved. (E) In case of a fire, prevent fire burning on the upper floors with excellent fire resistance. On the point.

Since the floor board has the above-mentioned functions, it must be excellent in bending strength against vertical load, rigidity in the in-plane direction, and sound insulation performance. Therefore, except for some buildings, most of them are made of reinforced concrete. The reinforced concrete structure has high rigidity, and also has excellent sound insulation performance and fire resistance performance, but the thickness of the floor board is 180 mm to 20 mm in order to satisfy all of these required performances.
0 mm, 400 kg / cm ^{2 to} 5 only by the weight of the floor
It was a very large value of 00 kg / cm ² .

For the purpose of rationalizing the construction of floors, a synthetic floorboard has been developed in which cast-in-place concrete c is cast on a precast concrete board b spanned between beams a as shown in FIG. Further, for the purpose of reducing the weight of the synthetic floor, as shown in FIG. 10, a floor in which a lightweight block f made of foamed resin is built inside a cast-in-place concrete e on a thin precast concrete plate d has been put into practical use. There is. In the figure, g is post-cast concrete, h
Is a truss line and i is a slab top line.

[0005]

Although conventional reinforced concrete floorboards are excellent in structural performance, fire resistance and sound insulation and are suitable for floorboards, they have the following problems in construction. (B) In some cases, the thickness of the floor is greater than the thickness required for the structure from the viewpoint of sound insulation and prevention of vibration interference, and recently, there is a floor having a thickness of about 20 cm. (B) As a result, the unit weight of the floor becomes larger and the weight of the building increases significantly. (C) Further, since the unit weight is large, the floor plate becomes thicker and more difficult to design in order to cope with a long span. Therefore, in the case of a long span, a beam is required. (D) Furthermore, during construction, there is a large number of man-hours such as the formwork industry, reinforcing bar construction, concrete placement, and the dismantling of the supporting work is not possible until the specified concrete strength is developed, so a great deal of waiting time is required and it is completed. It will take a lot of time before it will greatly affect the construction period of the whole body.

Further, the floor board shown in FIGS. 9 and 10 is also
The material was reinforced concrete, and its own weight was not much different from the conventional floor, and it was heavy. The present invention has been proposed in view of the problems of the above-mentioned conventional technology, and the object thereof is to have a structural performance equal to or higher than that of a conventional floorboard, and to have a sound-insulating property and a light-weight composite excellent in fire resistance. The point is to provide a manufacturing method and a construction method of a floorboard.

[0007]

In order to achieve the above object, according to the method of manufacturing a lightweight composite floor board according to the present invention, a lightweight concrete board, an ALC board, or a fireproof material is formed on the lower surface of a chord member of an assembled reinforcing bar truss. In addition to attaching a bottom plate consisting of a board, around the peripheral part of the bottom plate, a closing plate with vertical ribs arranged in rows is attached, and then the upper surface is closed with a sheet to which hard foaming resin does not adhere. And the hollow portion formed between the closing plate and the closing plate is filled with hard foaming resin to integrate the bottom plate on the lower surface and the assembled rebar truss, and then the upper surface sheet is removed, and the semi-finished product floor thus molded The surface of the hard foam resin is provided with irregularities.

According to a second aspect of the present invention, concrete is filled between the lightweight synthetic floorboards constructed by the method of the first aspect, and between the synthetic floorboards and the beams, and the vertical ribs of the closing plate are used to insert the concrete. The lightweight synthetic floorboard is constructed by integrating the synthetic floorboards with each other or by integrating the synthetic floorboard and the beams.
According to the invention of claim 3, after the lightweight synthetic floorboard is installed on the beam or the floor, concrete is placed on the joints between the floorboard and the beam and the upper surface of the lightweight synthetic floorboard to integrate the entire floor section. To do.

[0009]

The drawings show a preferred embodiment of the invention. 4 (a), (b) and (c) show an assembled rebar truss A used for a lightweight composite floorboard, and FIG. 4 (a) shows a three-dimensional rebar truss in which an upper chord muscle 1 and a lower chord muscle 2 are connected by a lattice muscle 3. 4 (b) is a reinforcing bar truss in which the upper chord muscle 4 and the lower chord muscle 5 are connected to each other with the diagonal bar 6 through the caulking metal fitting 7, and FIG. 4 (c) is a pair of upper and lower chord muscles 8 and 8 and the lower chord muscle. 9 and 9 shows a reinforcing bar truss with a steel plate lattice formed by sandwiching and welding the upper and lower parts of a steel plate lattice 10 bent in a corrugated manner.

FIG. 1 shows an external view of a semi-finished lightweight floorboard, the floorboard having a thickness of about 15 to 20 cm and a width of 180 cm to 240 c.
m, length is about 4 to 6 m, and allocation is determined according to the building to be implemented, and width and length are adjusted. The cross sections of the floorboard in the short side direction and the long side direction are shown in FIGS. 2 and 3. In the production of the floor board, after the assembled rebar truss A was produced as described above, the truss A was installed at a predetermined interval and, if necessary, tightly connected by a force distribution bar to be integrated, and thus assembled in a mat shape. A lightweight concrete plate, or ALC or a bottom plate B made of a fireproof board is attached to the lower chord of each assembled reinforcing bar truss A.

Vertical ribs 1 are formed on the outer peripheral edges of the four sides of the bottom plate B.
A closing plate C made of a lightweight concrete plate or a GRC plate in which 1 is arranged is attached to produce a box-shaped body. The peripheral closing plate C may be a bent iron plate having ribs arranged in the vertical direction. After constraining the periphery of the box-shaped floor plate in this manner, the upper surface is covered with a surface material to which the foamed resin does not adhere.
The surface material is installed so that the upper chord streaks of the assembled rebar truss A project, and hard foamed resin is injected into the hollow portion of the box-shaped portion formed by the surface material, the bottom plate B and the closing plate C to infer the lower surface. After the bottom plate B and the assembled reinforcing bar truss A are integrated, the lid on the upper surface is removed to complete a semi-finished composite floor plate. A part of the assembled reinforcing bar truss is exposed from the upper surface of the floor board, and the surface after removing the lid of the upper surface is hard foam resin D.
Since it is finished smoothly, unevenness is provided on the surface.

As the refractory board for forming the bottom plate B, an ultralight plate having a specific gravity of about 0.5 to 1.0 is used, and the hard foam resin D has a specific gravity of about 0.3. The semi-finished composite floorboard constructed as above has a weight of 80 to 100.
The weight of the floor after completion is about 150 kg to 180 kg / m
It will be about ² . When joining the lightweight floorboard E constructed as described above and the steel frame beam F, the floorboard E is laid on the steel beam F as shown in FIG. Then, concrete is placed on the joint portion of the beam F and the upper part of the floor plate E to integrate the floor plate E and the beam F.
In the figure, 12 is a floor board receiver, 13 is expanded metal, and 14
Is a stud bolt, 15 is cast-in-place concrete that constitutes a slab, and 16 is a slab reinforcing bar.

At this time, since the longitudinal ribs 11 are provided around the floor plate E on all four sides, the floor plate E and the steel beam F are provided.
By filling the joints between the floorboards E with concrete, the whole is integrated through the ribs 11 attached to the periphery of the floorboard E, and together with the cast-in-place concrete 15 placed on the upper surface, The in-plane rigidity of the floor slab is secured.

When joining the lightweight floorboard E and the steel beam F, as shown in FIG. 5, the floorboard receiver 1 is attached to the web of the steel beam F.
2 is installed so that the surface of the semi-finished lightweight floorboard E and the beam flange are located at the same level, and the cast-in-place concrete 15 is post-cast. Alternatively, as shown in FIG. 6, there is a method in which a lightweight floorboard E is installed slightly apart from a beam flange and concrete is placed so that the flange is rolled up. In the latter case, the degree of fixing of the end portion of the floorboard is increased and evaluated as the fixed end portion. Further, a method of directly installing the semi-finished lightweight floorboard E on the flange is also performed.
5 and 6, the same parts are designated by the same reference numerals.

The beam may be made of steel, reinforced concrete or reinforced concrete. When the beam is a reinforced concrete beam F ₁ , the lightweight floorboard E is mounted on the beam form 17 as shown in FIG. 7. In the figure, 18 is the main beam,
19 is a support. In the case of Precast concrete beam F ₂ is the end of the lightweight floor plate E is rests on the beam skeleton as shown in Figure 8. According to the above installation methods, in any case, the floorboard is evaluated as being fixed at the end. In the figure, the same parts as those in the above-mentioned respective embodiments are designated by the same reference numerals.

[0016]

As described above, according to the present invention, a lightweight concrete plate or an AL is provided on the lower surface of the chord member of the assembled reinforcing bar truss.
In addition to attaching a lightweight bottom plate made of C plate or fireproof board, a closing plate with vertical ribs is attached to the peripheral part of the bottom plate, and the hollow part is closed on the upper surface with a sheet that does not adhere to the rigid foamed resin sheet. After forming, filling the hollow part with hard foam resin and integrating the bottom plate and the assembled reinforcing bar truss, remove the upper surface sheet, thus molding the semi-finished product floor, and postcasting concrete on the surface By providing the unevenness for improving the adhesive force, a lightweight floorboard is manufactured.

By reducing the weight of the floorboard in this way, the impact on the foundation is great and the horizontal load acting during an earthquake is also reduced, so the cross-sections of columns and beams are also small, and the cost of the frame is greatly reduced. To be done. In addition, since it is lightweight, the transportation cost per floorboard during factory production and shipping is greatly reduced, and the lifting machine used during assembly can also be downsized, which reduces the transportation cost of the overall frame. To be done.

According to the second aspect of the present invention, the closing plates arranged on the four circumferences of the front bottom plate serve as a weir plate when the bottom plate is filled with the hard foaming resin, and are arranged in the vertical direction in the closing plate. The rib not only reinforces the closing plate, but also increases the shearing resistance of the joint portion at the time of joining with the adjacent member and enhances the joining force. According to the invention of claim 3, since the floor plate is a semi-finished product floor plate and also serves as a formwork, no support work is required at the construction site. Further, after laying the floor plate, concrete on the joints and the upper surface is placed. Since the construction of the floor is completed by this, it can be applied regardless of the structural type of the beam, reducing the frame cost and the construction period.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lightweight synthetic floorboard produced by the method of the present invention.

FIG. 2 is a perspective view showing a cross section in the short side direction of the floor plate.

FIG. 3 is a cross-sectional view of the floor plate in the long side direction.

4 (a), (b) and (c) are perspective views of an assembled rebar truss.

FIG. 5 is a vertical cross-sectional view showing an example of a joint between a floor plate and a steel beam.

FIG. 6 is a vertical cross-sectional view showing another embodiment of the joint portion between the floor plate and the steel frame beam.

FIG. 7 is a vertical cross-sectional view showing a joint between the floor plate and a reinforced concrete beam.

FIG. 8 is a vertical cross-sectional view showing a joint between the floor board and a half precast concrete beam.

FIG. 9 is a partially cutaway perspective view showing an example of a conventional floor structure.

FIG. 10 is a vertical cross-sectional view showing another example of the conventional floor structure.

[Explanation of symbols]

A Assembled rebar truss B Bottom plate C Closure plate D Hard foam resin E Lightweight floor plate F Steel beam G F ₁ Reinforced concrete beam F ₂ Half precast concrete beam 1 Upper chord muscle 2 Lower chord muscle 3 Lattice muscle 4 Upper chord muscle 5 Lower chord muscle 6 Diagonal muscle 7 Caulking metal fittings 8 Upper chord muscle 9 Lower chord muscle 10 Steel plate lattice 11 Longitudinal rib 12 Floor board support 13 Expanded metal 14 Stud bolt 15 Cast-in-place concrete 16 Slab reinforcing bar 17 Beam formwork 18 Beam main bar 19 Strut

Front page continued (72) Inventor Keiro Adachi 1-10-12 Nihonbashi Horidome-cho, Chuo-ku, Tokyo Chuo Built Industry Co., Ltd. (72) Inventor Koso Kitano 1-10-12 Nihonbashi-Horidome-cho, Chuo-ku, Tokyo No. Chuo Built Industry Co., Ltd.

Claims (3)

[Claims] 1. A bottom plate made of a lightweight concrete plate, an ALC plate, or a fireproof board is attached to the lower surface of a chord member of an assembled reinforcing bar truss, and a closing plate having longitudinal ribs arranged in rows is provided around the bottom plate. After mounting, the upper surface is closed with a sheet to which the hard foaming resin does not adhere, and thus the hollow portion formed between the sheet and the bottom plate and the closing plate is filled with the hard foaming resin, and the bottom plate and the bottom plate After integrating the assembled reinforcing bar truss, remove the upper sheet,
A method for producing a lightweight synthetic floorboard, characterized in that unevenness is provided on the surface of the hard foamed resin of the thus-formed semi-finished product floor. 2. The lightweight synthetic floorboards configured by the method of claim 1, and concrete between the synthetic floorboards and the beams are filled with concrete, and the synthetic floorboards are joined to each other via vertical ribs of the closing board, Alternatively, a method for constructing a lightweight synthetic floorboard in which the same synthetic floorboard and beams are integrated. 3. The light-weight composite floorboard is installed on a beam or a floor, and then concrete is placed on the joints between the floorboard and the beam and the upper surface of the light-weight composite floorboard to integrate the entire floor section. Construction method of lightweight synthetic floorboard.