JP7079449B2 - Soundproof wall - Google Patents

Description

The present invention relates to a wall structure having soundproofing performance.

On railways and roads, noise barriers are provided to prevent noise generated when vehicles travel from propagating to the outside.
As the conventional soundproof wall, a heavy concrete soundproof wall is used.
However, concrete deteriorates over time, is heavy, and has a heavy load on lower structures such as viaducts.
For this reason, in recent years, lightweight fiber reinforced plastic (FRP) soundproof walls have been adopted in place of concrete soundproof walls.

Japanese Unexamined Patent Publication No. 2007-23919 Japanese Unexamined Patent Publication No. 2013-68018

The soundproof wall made of FRP described in Patent Document 1 includes a core material to enhance the soundproof performance.
However, by including the core material, the weight of the soundproof panel constituting the soundproof wall becomes large, and the transportation and the installation work at the site become heavy labor.

The FRP soundproof wall described in Patent Document 2 has a hollow structure.
The hollow structure soundproof wall is lightweight and easy to transport and install on site, but the acoustic transmission loss in a specific band decreases due to the resonance phenomenon caused by the air in the internal space, resulting in a soundproof wall with low soundproof performance.

An object of the present invention is to provide a soundproof wall which is lightweight, easy to transport and install on site, and has high soundproof performance.

The first invention of the present application made to achieve the above object comprises a rectangular FRP wall material in a plan view and a sound absorbing body arranged on the surface of the FRP wall material, and the FRP wall material has a flat plate shape. The wall plate is composed of a wall plate and T-shaped ribs in a plan view that project from the surface of the wall plate in the height direction when the FRP wall material is erected, and the sound absorbing body is a rectangular plate. The sound absorbing body is arranged in at least one of the ribs arranged in parallel with one FRP wall material or between the ribs of two FRP wall materials arranged side by side. The rib has a side holding material substantially parallel to the wall surface plate, and the side side of the sound absorbing body is located between the wall surface plate and the side holding material . Provide a soundproof wall.
The second aspect of the present invention is characterized in that, in the soundproof wall of the first invention, among the wall plates, the soundproofing includes a flange projecting from the surface of the side surface parallel to the ribs in parallel with the wall surface plate. Provide a wall .
The third aspect of the present invention is the soundproof wall of the first invention or the second invention , wherein the soundproof wall has a surface pressing material disposed between the side pressing members of the adjacent ribs. I will provide a.
A fourth aspect of the present invention provides a soundproof wall according to any one of the first to third inventions, wherein an upper lid is arranged above the sound absorbing body.

The present invention can obtain at least one of the following effects by means for solving the above-mentioned problems.
(1) Both the FRP wall material and the sound absorbing body that make up the soundproof wall are lightweight, and are easy to transport and install on site.
(2) Since the sound absorbing body is installed on the surface of the FRP wall material, the soundproofing performance is high.
(3) The sound absorbing body only presses the side portion with the side pressing material, and since the exposed portion is large, it becomes a soundproof wall having high soundproofing performance.
(4) Since it is a lightweight soundproof wall, it can be used in replacement of an existing wall regardless of the structure of the installed structure.

Perspective view of the soundproof wall of the present invention Perspective view of FRP wall material of soundproof wall of this invention Explanatory drawing of fixed state of FRP wall material Cross-sectional view of the soundproof wall of the present invention Perspective view of the sound absorbing body of the soundproof wall of the present invention Explanatory drawing of construction method of soundproof wall of this invention (1) Explanatory drawing (2) of construction method of soundproof wall of this invention Explanatory drawing (3) of construction method of soundproof wall of this invention Perspective view of the soundproof wall according to other examples Cross-sectional view of the soundproof wall according to other examples

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Example 1]
<1> Configuration of Soundproof Wall The soundproof wall of the present invention is configured by combining the FRP wall material 1 and the sound absorbing body 2 arranged on the surface of the FRP wall material 1 (FIG. 1).

<2> FRP wall material The FRP wall material 1 is a member made of a fiber reinforced resin (FRP) or a glass fiber reinforced resin (GFRP).
The FRP wall material 1 is provided on a flat plate-shaped wall plate 11 having a rectangular plan view, a rib 12 projecting from the surface of the wall plate 11 in the height direction, and a side surface of the wall plate 11 parallel to the rib 12. It is composed of a flange 13 (FIG. 2).
The wall plate 11, the rib 12, and the flange 13 are integrally molded.
The FRP wall material 1 is erected on an anchor bolt 31 placed in an erected structure via an angle 3, a fixing bolt 32, and a fixing nut 33 (FIG. 3). The method of erecting the FRP wall material 1 is not limited to this method.

<2.1> Rib The rib 12 is a member having a T-shape in a plan view.
When a plurality of FRP wall materials 1 are erected, the length from the side side of the wall surface plate 11 to the ribs 12 and the distance between the adjacent ribs 12 are set so that the ribs 12 are arranged in parallel at equal intervals.

<2.2> Flange The flange 13 has a flat plate shape, and projects from the surface of the side surface of the wall plate 11 in parallel with the wall plate 11.
When the side sides of the plurality of FRP wall materials 1 are erected together, the flange 13 is located on the surface of the joint portion between the side sides.
By providing the flange 13, there is no gap between the FRP wall materials 1, and the force acting in the direction orthogonal to the surface of the FRP wall material 1 is distributed to the adjacent FRP wall materials 1 via the flange 13 (FIG. 4).

<3> Sound absorber The sound absorber 2 reduces the energy of the reflected sound by converting the energy of the incident sound into heat energy.
The sound absorbing body 2 is a composite in which a base material 21 formed of a polyester fiber non-woven fabric in the shape of a rectangular plate and a surface material 22 made of a polyester fiber spunbonded non-woven fabric are heat-sealed and integrated at least on the acoustically incident side of the base material 21. It is a sound absorber (Fig. 5) and exhibits excellent sound absorption performance. Further, by applying the water repellent treatment to the surface material 22, it also serves as a protective material for the base material 21. The surface material 22 is not limited to the acoustically incident side of the base material 21, and may be provided on the entire surface.
The polyester fiber non-woven fabric, which is the constituent material of the sound absorbing body 2, is lightweight, has excellent sound absorbing performance, is environmentally friendly because it can be recycled, and has excellent weather resistance, durability, water resistance, and chemical resistance. It is a material that can be used stably for a long period of time.
The sound absorbing body 2 is arranged between the ribs 12 arranged in parallel with one FRP wall material 1 among the standing FRP wall materials 1 and between the ribs 12 of the two FRP wall materials 1 standing side by side.
The size of the sound absorbing body 2 is shorter in the height direction than the height of the FRP wall material 1, the width direction is substantially the same as the distance between the parallel ribs 12, and the depth direction is from the height of the protruding ribs 12. Also shorten.

<3.1> Holding the sound absorbing body It is preferable that there is no gap between the wall surface plate 11 of the FRP wall material 1 and the sound absorbing body 2.
The lower end of the sound absorbing body 2 is supported by the support member 14 projecting from the wall surface plate 11 and the rib 12.
Further, the rib 12 of the FRP wall material 1 is provided with a side holding material 15 along the height direction of the FRP wall material 1.
The side holding member 15 has an L-shaped cross-sectional view, one side is fixed along the rib 12, and the other side is a holding portion protruding from the rib 12. The pressing portion is parallel to the wall surface plate 11, and the distance between the pressing portion and the wall surface plate 11 is substantially the same as the depth of the sound absorbing body 2. As a result, the side portion of the sound absorbing body 2 is held by the side pressing member 15.
It is preferable that the support material 14 and the side holding material 15 are made of FRP like the FRP wall material 1 and fixed to the FRP wall material 1 via rivets, bolts and nuts.
The sound absorbing body 2 is arranged between the ribs 12 of the wall surface material, and the side side portion is only pressed by the side pressing material 15, so that the exposed portion is large and the soundproof wall has high soundproofing performance.

<4> Since the upper lid sound absorbing body 2 is a polyester fiber-based sound absorbing material obtained by heat-sealing a surface material 22 having a water-repellent treatment on the surface of the base material 21, it retains water resistance, but water should enter inside. And water may be retained for some time.
Therefore, by setting the orientation direction of the polyester fibers constituting the sound absorbing body 2 to one direction and the orientation direction to the height direction when the polyester fibers are installed on the FRP wall material 1, the water that has entered the inside flows downward along the fibers. It has the characteristic of being easily drained, and is quickly drained.
Further, an upper lid 16 is provided at the upper end of the parallel FRP wall materials 1.
The upper lid 16 is provided between the upper ends of the ribs 12 arranged in parallel, and is fixed to the upper lid support member 161 projecting from the upper ends of the ribs 12. It is preferable that the upper lid 16 and the upper lid support material 161 are made of FRP or GFRP as in the FRP wall material 1, and the upper lid 16 and the upper lid support material 161 are fixed via rivets.
By covering the upper part of the sound absorbing body 2 with the upper lid 16, it is possible to prevent water from entering the inside of the sound absorbing body 2.

<5> Construction of soundproof wall <5.1> Installation of FRP wall material Next, a method of constructing a soundproof wall using the FRP wall material 1 and the sound absorbing body 2 will be described.
First, the wall plate 11, the rib 12, and the flange 13 are integrally molded, and the FRP wall material 1 to which the support material 14, the side holding material 15, and the upper lid support material 161 are attached in advance is erected side by side (FIG. 6a).
The flange 13 is located on the surface of the joint portion of the adjacent FRP wall materials 1.
Ribs 12 are arranged in parallel at equal intervals on the surface of the FRP wall material 1 arranged in parallel.
The FRP wall material 1 is lightweight and easy to transport and install on site.

<5.2> Arrangement of sound absorbing bodies Next, the sound absorbing bodies 2 are dropped between the surface of the FRP wall material 1 and the side holding material 15 between the ribs 12 arranged in parallel at equal intervals (FIG. 6b).
The lower end of the sound absorbing body 2 is supported by the support member 14 projecting from the wall surface plate 11 and the rib 12.
The sound absorbing body 2 is lightweight and easy to carry and drop in on-site.

<5.3> Installation of the upper lid Finally, the upper lid 16 is laid between the upper ends of the ribs 12 in parallel and fixed to the upper lid support member 161 projecting from the upper end of the ribs 12 (FIG. 6c).
Since the upper lid 16 is made of FRP or GFRP, it is lightweight and easy to transport and install on site.

Both the FRP wall material 1 and the sound absorbing body 2 constituting the soundproof wall are lightweight. Therefore, the soundproof wall is also lightweight.
Therefore, in the replacement of the existing wall, the lightweight soundproof wall of the present invention can be used even when the conventional concrete soundproof wall has a large load on the lower structure due to its high weight and is difficult to use. ..

[Other Examples]
<1> Installation of Surface Pressing Material The surface pressing material 17 may be installed on the surface of the sound absorbing body 2 at a predetermined interval in the height direction (FIGS. 7 and 8).
The surface pressing material 17 has an L-shaped cross-sectional view (FIGS. 7 and 8 (a)) or a flat plate (FIG. 8 (b)).
Both ends of the surface pressing member 17 are fixed to the side pressing members 15 of the adjacent ribs 12, and the surface pressing member 17 is arranged between the side pressing members 15.
If there is a gap between the sound absorbing body 2 and the surface pressing material 17, a back support material 171 may be provided on the back surface of the surface pressing material 17 (FIG. 8). By eliminating the gap with the back support material 171, the sound absorbing body 2 is prevented from shaking due to wind or the like.
It is preferable that the surface pressing material 17 and the back support material 171 are made of FRP or GFRP as in the FRP wall material 1, and are fixed via rivets, respectively.

1 ... FRP wall material, 11 ... wall plate, 12 ... rib, 13 ... flange, 14 ... support material, 15 ... side holding material, 16 ... top lid, 161 ... top lid support material, 17 ... surface holding material, 171 ... back Support material 2 ... Sound absorber 3 ... Angle, 31 ... Anchor bolt, 32 ... Fixing bolt, 33 ... Fixing nut

Claims (4)

It consists of an FRP wall material having a rectangular shape in a plan view and a sound absorbing body placed on the surface of the FRP wall material.
The FRP wall material is composed of a flat plate-shaped wall plate and a T-shaped rib in a plan view protruding from the surface of the wall plate in the height direction when the FRP wall material is erected. ,
The sound absorbing body is a rectangular plate-shaped body, and the sound absorbing body is a rectangular plate-shaped body.
The sound absorbing body is arranged at least one of the ribs arranged in parallel with one FRP wall material or between the ribs of each of the two FRP wall materials arranged side by side .
The rib has a side holding material substantially parallel to the wall plate, and the rib has a side holding material.
A soundproof wall characterized in that the side side of the sound absorbing body is located between the wall surface plate and the side holding member . In the soundproof wall according to claim 1,
A soundproof wall having a flange projecting from the surface of a side surface parallel to the rib in the wall plate in parallel with the wall plate. In the soundproof wall according to claim 1 or 2 .
A soundproof wall comprising a surface pressing material disposed between the side pressing materials of the adjacent ribs. In the soundproof wall according to any one of claims 1 to 3 .
A soundproof wall, characterized in that an upper lid is arranged above the sound absorbing body.

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