JP3626712B2 - Construction method of soundproof wall - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a soundproof wall that is installed around a noise generation source such as a railroad or a road, and prevents diffusion of noise.
[0002]
[Prior art]
A conventional method for constructing this type of soundproof wall is a method of constructing a soundproof wall using a cemented porous sound-absorbing plate made of used polystyrene foam, and constructing a soundproof wall with a reinforced concrete structure There is one constituted by a process and a sound absorbing plate fixing step for fixing the cement-based porous sound absorbing plate to the sound insulating wall.
[0003]
According to the construction method of the soundproof wall, if the predetermined cementitious porous sound absorbing plate is fixed to the sound insulating wall in a state where an air layer that enhances the soundproofing effect is secured therebetween, the sound absorbing property and sound insulating property are obtained. It is possible to obtain an excellent soundproof wall.
[0004]
[Problems to be solved by the invention]
However, in the construction method of such a sound barrier, it is necessary to ensure excellent sound absorption, so that the sound absorbing plate is made of a resin-based material having a problem of weather resistance, a sheet-like material that is difficult to stand by itself, or a fibrous material It is necessary to use a porous material or a porous material, both of which have low strength and fragile properties.
[0005]
For this reason, the sound barrier construction method includes a large amount of stiffening member mounting work to prevent the sound absorbing plate from being cracked on the four sides and surface of the sound absorbing plate, and a structurally safe sound absorbing plate to the sound insulating wall. It is necessary to include a large amount of mounting work for fixing the hardware, and there is an inconvenience that the labor is considerably increased and the cost is considerably high.
[0006]
Accordingly, an object of the present invention is to provide a soundproofing effect between a predetermined cementitious porous sound absorbing body between the sound insulating wall and the sound insulating wall so that a soundproof wall having excellent sound absorbing properties and sound insulating properties and excellent structural stability can be easily obtained. An object of the present invention is to provide a method for constructing a soundproof wall that can be reliably attached in a short time in a state where an air layer that enhances the air quality is secured.
[0007]
[Means for Solving the Problems]
That is, the construction method of the soundproof wall according to the present invention uses a sound absorber formed by attaching a lattice plate and a cemented porous sound absorbing plate made of aggregated used polystyrene foam to the outer peripheral frame in an overlapping state. A soundproof wall construction method for performing a sound insulation wall construction step for constructing a sound insulation wall, a column fixing step for fixing a column with respect to the sound insulation wall, and the sound absorbing body between the adjacent columns and the lattice plate the sound insulation wall. And a sound absorber mounting step in which the sound absorber is fitted in a state of facing the sound.
[0008]
According to the construction method of the soundproof wall according to the present invention, using a sound absorber formed by attaching a lattice plate and a cement-based porous sound absorbing plate made of aggregated used polystyrene foam to an outer peripheral frame in an overlapping state. Therefore, the predetermined cementitious porous sound absorber can be reliably fixed to the sound insulation wall in a short time in a state where an air layer for enhancing the soundproofing effect is secured between them.
Therefore, it is possible to easily obtain a soundproof wall that is excellent in sound absorption and sound insulation and is structurally stable.
[0009]
In such technical means, from the viewpoint of protecting the front surface of the cement-based porous sound-absorbing plate that is relatively fragile from accidental external force, the front-surface protective material is superimposed on the front surface of the cement-based porous sound-absorbing plate. It is preferable to include a protective material disposing step for disposing the protective member.
In this case, from the viewpoint of reliably forming the sound absorber integrated by the outer peripheral frame, the end of the lattice plate assembly is bent at a right angle to form a bent portion, and the outer peripheral frame On the other hand, it is preferable to include a step of overlapping the bent portions and mechanically joining them.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0011]
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 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. In addition, although the following description is about the soundproof wall for preventing the noise which generate | occur | produces with an elevated railway, it has validity also about the soundproof wall for preventing other noises.
[0012]
As shown in FIG. 1, the soundproof wall to which the present embodiment is applied includes a sound insulating wall 1, a support column 2, and a sound absorbing body 3. Hereinafter, each component will be described in detail.
[0013]
(1) Sound insulation wall 1
As shown in the figure, the sound insulation wall 1 is a wall body having a sufficiently thick reinforced concrete structure, and plays a role of preventing transmission of noise that is projected by traveling on a railway.
[0014]
By the way, in the case of a wall body made of a homogeneous material without gaps, the transmission loss of noise to be projected is proportional to the size of the mass and the thickness of the wall body.
[0015]
Therefore, according to such a sound insulation wall 1 having a sufficiently large thickness and a large mass, the transmission loss is sufficiently large, and a high sound insulation effect can be obtained.
[0016]
(2) Prop 2
As shown in the figure, the support column 2 is fixed to the sound insulation wall 1 and a state in which an air layer that functions to enhance the sound insulation effect is secured between the sound absorber 3 and the sound insulation wall 1 described later. It plays a supporting role.
[0017]
Specifically, as shown in FIG. 1B, the support column 2 is a steel material having a hat-shaped cross section, and is fixed to the sound insulation wall 1 at several locations by anchor bolts 11.
[0018]
(3) Sound absorber 3
As shown in FIG. 1, the sound absorber 3 is mounted between adjacent struts 2 with the lattice plate 21 facing the sound insulation wall 1, and reflects the noise that is projected when the railway travels. It plays a role of preventing it.
[0019]
Specifically, as shown in FIGS. 1 and 2, the sound absorber 3 includes a lattice plate 21, a cement-based porous sound-absorbing plate 22 provided on the front surface of the lattice plate 21, and a cement-based porous sound-absorbing plate. As a stiffening member that restrains from the four sides in a state where the front protective plate 23, which is a front protective material provided on the front side of the plate 22, and the lattice plate 21, the cement-based porous sound absorbing plate 22 and the front protective plate 23 are stacked It consists of an outer peripheral frame 24 which is an angle steel that fulfills its function. That is, the sound absorber 3 is attached to the outer peripheral frame 24 in a state where the lattice plate 21, the cementitious porous sound absorbing plate 22 and the front protective plate 23 are overlapped.
[0020]
As shown in FIG. 2, the lattice plate 21 includes a metal braid 21a arranged in parallel with each other in the vertical direction and a metal braid 21b arranged in parallel with each other in a direction orthogonal to these. It is configured in combination. Each braid 21a, 21b is processed with a notch A at a predetermined interval, and the lattice plate 21 can be formed relatively easily by fitting these notches A together. Moreover, the bending part 31 bent at right angle is formed in the both ends of each braid 21a, 21b. And the screw hole B is provided in the site | part corresponding to the bending part 31 of this bending part 31 and the outer periphery frame 24, the screw | thread 32 is screwed in matching the position of each screw hole B, the lattice board 21, cement The system porous sound absorbing plate 22 and the front protective plate 23 are securely restrained in a state where they are stacked.
[0021]
This cement-based porous sound-absorbing plate 22 is a porous plate-like member obtained by kneading a used foamed polystyrene with an aggregate, a cement paste and, if necessary, an admixture, and solidifying it. Sound absorption effect is obtained. Further, if the sound absorber 3 is fixed in a state where the lattice plate 21 faces the sound insulation wall 1, a 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. Therefore, a higher sound absorption effect can be obtained relatively easily.
[0022]
The front protective plate 23 is provided with a large number of holes, and functions as a stiffening member that restrains and stiffens the cement-based porous sound absorbing plate 22 from the front while simultaneously obtaining a high sound absorbing effect through the holes. It is supposed to be.
In the case where the strength of the cement-based porous sound absorbing plate 22 is sufficiently large and cracking of the cement-based porous sound absorbing plate 22 does not cause a problem later, the front protective plate 23 may be omitted.
[0023]
Next, the construction method of the soundproof wall according to the present embodiment will be described with reference to FIGS. The sound barrier construction method includes a sound insulation wall construction step, a column fixing step, a sound absorber construction step, and a sound absorber attachment step.
[0024]
(1) Sound insulation wall construction process First, a sound insulation wall construction process for constructing the sound insulation wall 1 is performed.
[0025]
That is, when the reinforcing bars (not shown) are assembled in a hook shape, the formwork is erected and fixed before and after the hooked reinforcing bars. The concrete is then driven into such a formwork.
[0026]
Then, when the formwork is released after the concrete curing period has elapsed, the sound insulating wall 1 which is a wall body of a reinforced concrete structure is obtained. At this point, the sound insulation wall construction process is completed.
[0027]
(2) Column fixing step Next, a column fixing step of fixing the column 2 to the sound insulation wall 1 is performed.
[0028]
That is, the rear surface portion of the column 2 that is in a vertical state with respect to the sound insulating wall 1 is kept in contact.
[0029]
The rear surface portion of the support column 2 in such a state is fixed with several anchor bolts 11 per one. Thereby, the support | pillar 2 is fixed to the sound insulation wall 1, and a support | pillar fixing process is complete | finished (refer Fig.3 (a)).
[0030]
(3) Sound absorber constructing step Next, a sound absorber constructing step for constructing the sound absorber 3 using the lattice plate 21, the cement-based porous sound absorber 22, the front protective plate 23 and the outer peripheral frame 24 is performed (see FIG. 2). ).
[0031]
First, the lattice plate 21 is formed when the notches A of the braid are fitted together.
[0032]
Subsequently, the cemented 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 cemented porous sound absorbing plate 22.
[0033]
In the lattice plate 21, the cementitious porous sound absorbing plate 22 and the front protective plate 23 in such a state, the positions of the screw holes B provided in the bent portions of the lattice plate 21 and the outer peripheral frame 24 are aligned. When the screws 32 are screwed in, the lattice plate 21, the cementitious porous sound absorbing plate 22 and the front protective plate 23 are reliably restrained in such a stacked state.
[0034]
Thereby, the sound absorber 3 is completed, and the sound absorber construction process is completed.
[0035]
By the way, the sound absorber construction step in the present embodiment includes a protective material disposing step of disposing a front protective plate 23 as a front protective material so as to overlap the front surface of the cement-based porous sound absorbing plate 22.
[0036]
As a result, the front surface of the cement-based porous sound absorbing plate 22 that is relatively fragile is covered with the stiffening member, and such a cement-based porous sound absorbing plate 22 can be protected from accidental external force. ing.
[0037]
An accidental external force includes, for example, an impact force due to a ballast collision.
[0038]
In addition, the end of the braid of the lattice plate 21 is bent at a right angle to form a bent portion 31, and includes a step of mechanically joining the bent portion 31 to the outer peripheral frame 24.
[0039]
Thereby, it is possible to reliably form the sound absorber 3 integrated by the outer peripheral frame 24.
[0040]
(4) Sound absorber mounting step A sound absorber mounting step is performed in which the sound absorber 3 is mounted between adjacent struts 2 in a state where the lattice plate 21 faces the sound insulating wall 1.
[0041]
That is, the sound absorber 3 integrated in the sound absorber construction process is inserted and fitted between adjacent struts 2 without using a joining means such as a bolt or welding (see FIG. 3B).
As a result, the sound absorber 3 is mounted between adjacent struts 2 with an air layer secured between the sound insulating wall 1 and the sound insulating wall 1.
[0042]
Then, when all the sound absorbers 3 are mounted between all the columns 2, this sound absorber mounting process is completed.
[0043]
As described above, according to the construction method of the soundproof wall according to the present embodiment, the sound absorption is performed in a state in which the outer frame 24 and the front protective material are integrated and stiffened in advance and an air layer is secured on the rear side. Since the body 3 is dropped and fitted between the columns 2 fixed to the sound insulation wall 1, the predetermined sound absorber 3 is securely attached to the sound insulation wall 1 in a short time with an air layer secured between them. It became possible.
[0044]
That is, according to the construction method of the soundproof wall, it is possible to easily and quickly obtain a soundproof wall that is excellent in sound absorption and sound insulation and is structurally stable.
[0045]
【The invention's effect】
According to the construction method of the soundproof wall according to the present invention, the predetermined cementitious porous sound absorber can be reliably attached to the soundproof wall in a short time in a state where an air layer for enhancing the soundproofing effect is secured between them. It becomes. 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 the 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 for explaining a construction method of a soundproof wall according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sound insulation wall 2 ... Support | pillar 3 ... Sound absorption body 11 ... Anchor bolt 21 ... Lattice plate 21a ... Kumiko 21b ... Kumiko 22 ... Cement system porous sound absorption board 23 ... Front protection board (front protection material)
24 ... outer peripheral frame 31 ... bent portion 32 ... screw A ... notch B ... screw hole

Claims (3)

It is a construction method of a soundproof wall using a sound absorber formed by attaching a lattice plate and a cemented porous sound absorbing plate made of aggregated used polystyrene to the outer peripheral frame,
Sound insulation wall construction process to construct a sound insulation wall,
A column fixing step of fixing the column to the sound insulation wall;
A sound absorber mounting step in which the sound absorber is fitted between the adjacent struts in a state where the lattice plate faces the sound insulation wall.
How to build a noise barrier. Including a protective material disposing step of disposing a front surface protective material on the front surface of the cement-based porous sound absorbing plate,
The soundproof wall construction method according to claim 1. A step of bending the ends of the lattice plate assembly at right angles to form a bent portion, and mechanically joining the bent portion to the outer peripheral frame.
The construction method of the soundproof wall of Claim 1 or Claim 2.

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