JP2003055919A - Method of constructing sound insulating wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of constructing a sound insulating wall enabling a predetermined cement porous sound absorber to be securely mounted to the sound insulating wall in a short time while securing between them an air layer enhancing the effect of sound insulation, so that the structurally stable sound insulating wall excellent in sound absorbing and insulating properties can be obtained readily. SOLUTION: The method of constructing the sound insulating wall uses the sound absorber 3 obtained by mounting to an outer peripheral frame 24 a grid panel 21 and a cement porous sound absorbing panel 22 overlapping each other, the sound absorbing panel using used styrene foam as aggregate. The method includes a sound insulating wall construction process for constructing the sound insulating wall 1, a column fixing process for fixing columns 2 to the sound insulating wall, and a sound absorber mounting process for mounting the sound absorber 3 between adjacent columns 2, with the grid panel 21 opposed to the sound insulating wall 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a soundproof wall which is installed around a noise source such as a railway or a road and which prevents the noise from spreading.

[0002]

2. Description of the Related Art A conventional method for constructing a soundproof wall of this type is a method for constructing a soundproof wall using a cement-based porous sound-absorbing plate made of used styrofoam, which is a reinforced concrete structure. And a sound absorbing plate fixing step of fixing the cement-based porous sound absorbing plate to the sound insulating wall.

According to such a method of constructing a soundproof wall, if a predetermined cement-based porous sound-absorbing plate is fixed to the sound-insulating wall with an air layer for enhancing the soundproof effect secured between them, the sound-absorbing property is improved. It is also possible to obtain a soundproof wall having excellent sound insulation.

[0004]

However, in such a method of constructing a soundproof wall, it is necessary to ensure excellent sound absorbing properties, so that the sound absorbing plate made of a resin material having a problem of weather resistance is difficult to stand by. It is necessary to use a sheet-like material, a fibrous material or a porous material, and all of them have low strength and brittle properties.

Therefore, in the method of constructing such a soundproof wall,
Installation of a large amount of stiffening members on the four sides or the surface of the sound absorbing plate to prevent the sound absorbing plate from cracking later, and installation of a large amount of hardware to structurally and safely fix the sound absorbing plate to the sound insulation wall. However, there is an inconvenience that it takes a lot of time and labor and the cost is considerably high.

Therefore, an object of the present invention is to provide a predetermined cement-based porous sound absorber between the sound-insulating wall and the sound-insulating wall so that a sound-insulating wall excellent in sound absorbing property and sound insulating property and structurally stable can be easily obtained. Another object of the present invention is to provide a method of constructing a soundproof wall that can be reliably attached in a short time while securing an air layer that enhances the soundproof effect.

[0007]

That is, a method of constructing a soundproof wall according to the present invention is a state in which a lattice plate and a cement-based porous sound absorbing plate made of used polystyrene foam are stacked on an outer peripheral frame. A method of constructing a soundproof wall using a sound absorber installed as a sound-insulating wall, a sound-insulating wall building step of building a sound-insulating wall, a pillar fixing step of fixing a pillar to the sound-insulating wall, and a space between the adjacent pillars. And a sound absorbing body mounting step of mounting the sound absorbing body in a state where the lattice plate faces the sound insulation wall.

According to the method of constructing the soundproof wall of the present invention,
Since it was decided to use a sound absorbing body that was attached to the outer peripheral frame in a state in which a lattice plate and a cement-based porous sound absorbing plate made of used styrofoam as an aggregate were stacked, a predetermined cement was applied to the sound insulation wall. The porous porous sound absorber can be reliably fixed in a short time with an air layer for enhancing the soundproof effect being secured therebetween. Therefore, it is possible to easily obtain a soundproof wall that is excellent in sound absorption and sound insulation and is structurally stable.

From the viewpoint of protecting the front surface of the cement-based porous sound absorbing plate, which is relatively fragile, from accidental external force by such technical means, the cement-based porous sound absorbing plate is overlaid on the front surface of the cement-based porous sound absorbing plate. It is preferable to include a protective material disposing step of disposing a front surface protective material. In this case,
From the viewpoint of reliably forming the sound absorbing body integrated by the outer peripheral frame, the end portion of the assembly of the lattice plate is bent at a right angle to form a bent portion, and the bending is performed with respect to the outer peripheral frame. It is preferable to include a step of overlapping parts and mechanically joining them.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a schematic structure of a soundproof wall to which an embodiment of the present invention is applied, FIG. 2 is an exploded perspective view showing a schematic structure of the soundproof wall, and FIG. 3 is an embodiment of the present invention. It is a perspective view explaining the construction method of the soundproof wall which concerns on the form of this. In addition,
The following description is for a soundproof wall for preventing noise generated by an elevated railway, but it is also valid for soundproof walls for preventing noise other than this.

The soundproof wall to which this embodiment is applied is shown in FIG.
As shown in FIG. 3, the sound insulation wall 1, the support column 2, and the sound absorber 3 are included. Hereinafter, each component will be described in detail.

(1) Sound insulation wall 1 As shown in the figure, the sound insulation wall 1 is a wall body of a reinforced concrete structure having a sufficiently large thickness so as to prevent the noise that would be projected by the traveling of the railway from passing through. It plays a role.

By the way, in the case of a wall made of a homogeneous material having no gap, the transmission loss of noise to be projected is proportional to the size of the mass and the thickness of the wall.

Therefore, according to the sound insulating wall 1 having such a large thickness and a large mass, the transmission loss becomes sufficiently large and a high sound insulating effect can be obtained.

(2) Post 2 The post 2 is fixed to the sound insulation wall 1 as shown in the figure, and has a function of enhancing the sound insulation effect between the sound absorber 3 and the sound insulation wall 1 which will be described later. It plays a role of supporting an air layer that fulfills the above condition.

Specifically, as shown in FIG. 1 (b), each of the support columns 2 is a steel material having a hat-shaped cross section, and the anchor bolts 1 are provided at a few places with respect to the sound insulation wall 1.
It is fixed at 1.

(3) Sound Absorbing Body 3 As shown in FIG. 1, the sound absorbing body 3 is mounted between adjacent columns 2 in a state where the lattice plate 21 faces the sound insulation wall 1. It plays the role of preventing the noise that is projected from being reflected.

Specifically, as shown in FIGS. 1 and 2, the sound absorbing body 3 includes a grid plate 21, a cement-based porous sound absorbing plate 22 provided on the front surface of the grid plate 21, and a cement-based material. A front protective plate 23, which is a front protective member further provided on the front surface of the porous sound absorbing plate 22, and a lattice plate 21, a cement-based porous sound absorbing plate 22, and a front protective plate 23, which are stacked on each other and are constrained from four circumferences. It is composed of an outer peripheral frame 24 which is a chevron steel that functions as a member. That is,
The sound absorbing body 3 is configured such that the lattice plate 21, the cement-based porous sound absorbing plate 22, and the front surface protecting plate 23 are attached to the outer peripheral frame 24 in a stacked state.

As shown in FIG. 2, the lattice plate 21 includes a metal assembly 21a arranged in parallel with each other in the vertical direction,
It is configured by combining with a metal assembly 21b arranged in parallel to each other in a direction orthogonal to these. Each Kumiko 2
The notches A are machined at predetermined intervals on the la and 21b, and the lattice plate 21 can be formed relatively easily by fitting these notches A together. Further, bent portions 31 bent at right angles are formed at both ends of each of the assembly members 21a and 21b.
Then, screw holes B are provided at portions of the bent portion 31 and the bent portion 31 of the outer peripheral frame 24, and the screws 32 are screwed in by aligning the positions of the screw holes B. The porous porous sound absorbing plate 22 and the front surface protecting plate 23 are securely restrained in a stacked state.

The cement-based porous sound-absorbing plate 22 is a porous plate-shaped member obtained by kneading used styrofoam, aggregate, cement paste and, if necessary, an admixture and solidifying them. Therefore, a high sound absorbing effect can be obtained. Further, if the sound absorber 3 is fixed in a state where the lattice plate 21 faces the sound insulation wall 1, the hollow region formed between the lattice plates 21 on the rear side of the cement-based porous sound absorbing plate 22 serves as an air layer. Since it performs the function of, a higher sound absorbing effect can be obtained relatively easily.

The front protection plate 23 is provided with a large number of holes, and while it functions as a stiffening member for restraining the cement-based porous sound absorbing plate 22 from the front surface to stiffen it, at the same time, it provides high sound absorption through the holes. It is designed to be effective. The front protective plate 23 may be omitted in a case where the strength of the cement-based porous sound absorbing plate 22 is sufficiently high and cracking of the cement-based porous sound absorbing plate 22 does not pose a problem later.

Next, a method of constructing the soundproof wall according to the present embodiment will be described with reference to FIGS. The soundproof wall construction method includes a sound insulation wall construction step, a pillar fixing step, a sound absorber construction step, and a sound absorber attachment step.

(1) Sound insulation wall construction process First, a sound insulation wall construction step of constructing the sound insulation wall 1 is performed.

That is, when the reinforcing bars (not shown) are assembled in a cage shape, the molds are erected and fixed in front of and behind the cage reinforcing bars. Then, concrete is driven into such a formwork.

When the formwork is removed after the concrete curing period has passed, the sound insulation wall 1 which is a wall body of a reinforced concrete structure is obtained. At this point, the sound insulation wall building process ends.

(2) Support post fixing step Next, a post fixing step of fixing the support pillar 2 to the sound insulation wall 1 is performed.

That is, the rear surface portion of the support column 2 which is in a vertical state with respect to the sound insulation wall 1 is in contact with it.

The rear surface of the column 2 in this state is fixed by anchor bolts 11 at several places. As a result, the pillar 2 is fixed to the sound insulation wall 1, and the pillar fixing process is completed (see FIG. 3A).

(3) Sound Absorber Constructing Step Next, a sound absorber constructing step of constructing the sound absorber 3 using the lattice plate 21, the cement-based porous sound absorbing plate 22, the front protective plate 23 and the outer peripheral frame 24 is carried out ( See FIG. 2).

First, when the notches A of the assembly are fitted to each other, the lattice plate 21 is formed.

Subsequently, the cement-based porous sound absorbing plate 22 is placed on the front surface of the lattice plate 21, and the front protective plate 23 is placed on the front surface of the cement-based porous sound absorbing plate 22.

In the lattice plate 21, the cement-based porous sound absorbing plate 22 and the front protective plate 23 in such a state,
When the screws 32 are screwed in by aligning the positions of the screw holes B provided in the bent portions of the lattice plate 21 and the outer peripheral frame 24, respectively, the lattice plate 21, the cement-based porous sound absorbing plate 22 and the front protective plate 23 are It is surely restrained in such a superposed state.

As a result, the sound absorbing body 3 is completed, and the sound absorbing body constructing process is completed.

By the way, the sound absorbing body constructing step in the present embodiment includes a protective material disposing step of disposing the front protective plate 23 as a front protective material on the front surface of the cement-based porous sound absorbing plate 22. I am trying.

As a result, the front surface of the cement-based porous sound absorbing plate 22 which is relatively fragile is covered with the stiffening member, and such a cement-based porous sound absorbing plate 22 can be protected from an accidental external force. It is possible.

The accidental external force may be, for example, an impact force caused by a ballast collision.

In addition, the step of bending the ends of the assembly of the lattice plate 21 at a right angle to form the bent portion 31 and superposing the bent portion 31 on the outer peripheral frame 24 and mechanically joining them are included. There is.

As a result, the sound absorber 3 integrated by the outer peripheral frame 24 can be reliably formed.

(4) Sound Absorber Mounting Step Then, a sound absorber mounting step is performed in which the sound absorber 3 is mounted between the adjacent columns 2 with the lattice plate 21 facing the sound insulation wall 1.

That is, the sound absorbing body 3 integrated in the sound absorbing body constructing step is dropped and fitted between the adjacent columns 2 without using any joining means such as bolts or welding (see FIG. 3 (b)). As a result, the sound absorbing body 3 is mounted between the adjacent columns 2 in a state where an air layer is secured between the sound absorbing body 3 and the sound insulating wall 1.

Then, when all the sound absorbers 3 are mounted between all the columns 2, this sound absorber mounting step is completed.

As described above, according to the method of constructing the soundproof wall of this embodiment, the outer peripheral frame 24 and the front surface protective material are integrated and stiffened in advance, and the air layer is secured on the rear side. Since it was decided to drop the sound absorbing body 3 between the columns 2 fixed to the sound insulating wall 1 and to fit it in, a certain sound absorbing body 3 is surely secured to the sound insulating wall 1 in a short time with an air layer secured between them. It has become possible to attach it to.

That is, according to this soundproof wall construction method,
It is now possible to easily and quickly obtain a soundproof wall that has excellent sound absorption and sound insulation properties and is structurally stable.

[0045]

According to the method for constructing a soundproof wall of the present invention, a predetermined cement-based porous sound absorber is secured to the soundproof wall in a short time while an air layer for enhancing the soundproof effect is secured between them. Can be attached to. Therefore, it is possible to easily and quickly obtain a soundproof wall that is excellent in sound absorption and sound insulation and is structurally stable.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a soundproof wall to which an embodiment of the present invention is applied.

FIG. 2 is an exploded perspective view showing a schematic configuration of a soundproof wall to which an embodiment of the present invention is applied.

FIG. 3 is a perspective view illustrating a method of constructing a soundproof wall according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Sound insulation wall 2… Support 3 ... Sound absorber 11 ... Anchor bolt 21 ... Lattice plate 21a ... Kumiko 21b ... Kumiko 22 ... Cement-based porous sound absorbing plate 23 ... Front protection plate (front protection material) 24 ... Perimeter frame 31 ... Bent section 32 ... Screw A ... Notch B ... Screw hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuo Fujiwara             1-8-3 Nishi Shinjuku, Shinjuku-ku, Tokyo Oda             Inside the Electric Railway Co., Ltd. (72) Inventor Nobuaki Kobayashi             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Ichio Kobayashi             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Yoshitaka Machida             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Koichi Nagase             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Jun Tabata             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. F-term (reference) 2D001 AA01 BA02 BB01 CA01 CB01                       CC01 CD02                 2E001 DF02 DF05 FA30 GA12 GA18                       GA32 GA46 GA58 HA01 HA06                       HB01 JA01 JD01 LA09                 5D061 AA13 AA25

Claims (3)

[Claims] 1. A method of constructing a soundproof wall using a sound absorbing body, wherein a lattice plate and a cement-based porous sound absorbing plate made of used styrofoam as an aggregate are attached to the outer peripheral frame in a stacked state. A sound insulation wall construction step of constructing a sound insulation wall, a pillar fixing step of fixing a pillar to the sound insulation wall, and a sound absorbing body in which the sound absorbing body is mounted between the adjacent pillars with the lattice plate facing the sound insulation wall. A method of constructing a soundproof wall, comprising: a body mounting step. 2. The method for constructing a soundproof wall according to claim 1, further comprising a protective material disposing step of disposing a front protective material on the front surface of the cement-based porous sound absorbing plate. 3. A step of bending an end portion of the assembly of the lattice plate at a right angle to form a bent portion, and superimposing the bent portion on the outer peripheral frame and mechanically joining the bent portion. The method for constructing a soundproof wall according to claim 1 or 2.