JP2004092193A - Plate member for sound-insulating wall, and sound insulating wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate member for a sound-insulating wall which enables the positive formation of the sound-insulating wall having excellent sound-absorbing properties and sound-insulating properties in an extremely short period of time, and allows not only a sound-absorbing portion but also a sound-insulating portion to sufficiently contribute to easy and quick mounting work in a construction field, and to provide the sound-insulating wall. <P>SOLUTION: In the formation of the plate member 3 for the sound-insulating wall, a sound-insulating plate 31 and a cement-based porous sound-absorbing plate 32 are superposed on each other with an air layer secured therebetween. The sound-absorbing plate 32 is made of styrofoam as an aggregate. Then the superposed plates 31, 32 are fitted into a peripheral frame 34. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a plate-like member for a soundproof wall and a soundproof wall which are installed around a noise source such as a railway or a road and prevent the diffusion of noise.
[0002]
[Prior art]
A conventional sound insulation wall of this type includes, for example, a sound insulation wall which is a concrete structure, a support fixed and erected at appropriate intervals on the side surface of the sound insulation wall, and a sound absorber mounted between the support. One is disclosed (for example, Patent Document 1).
Here, as the sound absorbing body, a lattice plate and a cement-based porous sound absorbing plate using styrofoam as an aggregate are attached to the outer peripheral frame in an overlapping state.
[0003]
[Patent Document 1]
JP-A-2000-336621 (pages 2 to 3, FIG. 1)
[0004]
According to such a sound insulating wall, it becomes possible to securely attach a predetermined cement-based porous sound absorbing plate to the sound insulating wall in a short time in a state where an air layer that enhances a sound insulating effect is secured therebetween. Thus, a soundproof wall which is excellent in sound absorbing property and sound insulating property and is structurally stable can be easily obtained.
[0005]
[Problems to be solved by the invention]
However, in such a soundproof wall, what originally contributes to the simplification and speeding up of the on-site installation work is a sound absorbing body formed in a panel shape and a supporting column for supporting the sound absorbing function. The sound insulation wall, which is the part that performs the sound insulation function, is constructed through complicated and long-term local processes, and contributes to the simplification and speeding up of such installation work. I can't say that.
[0006]
Therefore, an object of the present invention is to provide not only a part that performs a sound absorbing function but also a part that performs a sound insulating function so that a soundproof wall having excellent sound absorbing and sound insulating properties can be reliably obtained in a very short time. It is an object of the present invention to provide a sound-insulating wall plate member and a sound-insulating wall that can sufficiently contribute to simplification and speeding-up of work.
[Means for Solving the Problems]
That is, the present invention is configured to include the first invention and the second invention. The first invention relates to a plate member for a soundproof wall, and the second invention relates to a soundproof wall.
[0007]
The plate member for a sound insulating wall according to the first invention is a sound insulating plate and a cement-based porous sound absorbing plate in a state where a sound insulating plate and a cement-based porous sound absorbing plate using styrene foam as an aggregate are stacked on an outer peripheral frame. It is characterized in that it is attached in a state where an air layer is secured between the plates.
[0008]
On the other hand, the soundproof wall according to the second invention includes a support that is erected at appropriate intervals along the center of the wall and a plate member for the soundproof wall according to the first invention that is mounted between the supports. It is characterized by including.
[0009]
According to these plate-shaped members or sound-insulating walls for a soundproof wall, since they are configured to include such plate-shaped members, not only the part that performs the sound absorbing function but also the part that performs the sound insulating function is on site. It is possible to sufficiently contribute to the simplification and speeding up of the mounting operation.
[0010]
Therefore, according to this, it is possible to reliably obtain a soundproof wall having excellent sound absorbing properties and sound insulating properties in an extremely short time.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0012]
[Plate member and soundproof wall for soundproof wall]
FIG. 1 is a view showing the overall configuration of a soundproof wall according to an embodiment of the present invention (FIG. 1 (a) is a front view, FIG. 1 (b) is a plan sectional view, FIG. 1 (c) is a longitudinal sectional view, FIG. 1D is a rear view, and FIG. 2 is a diagram showing an entire configuration of a plate member for a soundproof wall applied to the soundproof wall (FIG. 2A is a front view, and FIG. 2B is a flat view). FIG. 2C is a longitudinal sectional view, FIG. 2D is a rear view, and FIG. 3 is a diagram showing a partial configuration of a plate member for a soundproof wall applied to the soundproof wall (FIG. (a) is a plan sectional view, FIG. 3 (b) is a plan sectional view, FIG. 3 (c) is a longitudinal sectional view), and FIG. 4 is a plan sectional view showing a partial configuration of the soundproof wall.
[0013]
In this embodiment, the noise barrier effectively absorbs motor noise during train running, rolling noise generated between wheels and rails, and squeak noise when passing a sharp curve, and the effect of noise on nearby areas. It is configured to serve to reduce
However, the soundproof wall according to the present invention is not limited to this. For example, the soundproof wall plays a role of absorbing an engine sound when the vehicle is running at a low speed or a sound generated from a tire when the vehicle is running at a high speed, and is installed outdoors. It can also be configured as a sound-absorbing wall for the installed equipment that plays a role in reducing the effect of noise on the neighborhood.
[0014]
Specifically, as shown in FIG. 1, this soundproof wall is configured to include a base 1, a support 2, and a plate-like member 3 for the soundproof wall. Hereinafter, each of these components will be described in detail.
(1) Base 1
The base 1 is configured to play a role of lying substantially horizontally as shown in FIG.
[0016]
More specifically, as the base 1, an H-section steel having a sufficient cross-sectional dimension as shown in the figure is used. A stiffener 1a as a stiffening member is provided at a position where the H-shaped steel column 2 is erected.
[0017]
That is, by embedding such a base 1 in, for example, a viaduct slab, it is possible to erect the support column 2 on the embedded base 1, and thereby, a plate-shaped soundproof wall is formed. The member 3 itself can function as a soundproof wall.
[0018]
(2) Support 2
As shown in FIG. 1, the column 2 is fixed to the upper surface of the base 1 so as to play the role of being erected at appropriate intervals along the center of the wall.
[0019]
More specifically, as the support 2, an H-section steel having a sufficient cross-sectional dimension as shown in the figure is used, and a bolt hole 2 b for attaching to the base 1 is provided in a portion fixed to the base 1. And an end plate 2a which is a steel material having the following. In addition, the flange has a bolt hole 2c for mounting the plate member 3 for a soundproof wall.
[0020]
(3) Plate member 3 for soundproof wall
As shown in FIG. 1, the plate member 3 for a soundproof wall is configured to play a role of being mounted between the columns 2.
[0021]
Specifically, as shown in FIGS. 2 and 3, the plate member 3 for the soundproof wall includes a sound insulating plate 31, a cement-based porous sound absorbing plate 32, and an air layer 33 secured therebetween. And an outer peripheral frame 34 which is an angle iron that functions as a stiffening member that restrains the sound insulation plate 31 and the cement-based porous sound absorption plate 32 from four sides in an overlapping state.
[0022]
Here, the mounting of the plate member 3 for the soundproof wall on the base 1 is performed via a cushioning member 51 which is a rubber plate attached to the upper surface of the base 1 as shown in FIG. Done.
[0023]
As shown in FIG. 4, the plate member 3 for the soundproof wall is mounted on the column 2 by positioning the positioning member 41 made of angle iron fixed to the outer peripheral frame 34 made of angle iron by welding or the like. And a plate member for a soundproof wall with respect to a buffer member 43 which is a rubber plate adhered to the inside of the other flange by a bolt screwed to one flange of the column 2 and a bolt tip of a nut 42. 3 is pressed.
[0024]
That is, as shown in FIGS. 2 and 3, the plate member 3 for a soundproof wall is in a state where the sound insulating plate 31 and the cement-based porous sound absorbing plate 32 are overlapped on the outer peripheral frame 34, and An air layer 33 is secured between the plate 31 and the cement-based porous sound absorbing plate 32 so as to be secured.
[0025]
Here, the sound insulation plate 31 is configured to play a role of preventing the transmission of the noise that is projected by the running of the train.
[0026]
Specifically, as shown in FIGS. 3 and 4, the sound insulating plate 31 is made of steel having a small thickness, but having a sufficient mass to compensate for the small thickness. Is used. That is, according to such a sound insulating plate 31, unlike the sound insulating wall which is a conventional concrete structure, it is possible to sufficiently contribute to the simplification and speedup of the installation work on site.
[0027]
In the case of a wall made of a homogeneous and solid material, the transmission loss of noise to be projected is proportional to the size of the mass and the thickness of the wall. Since it has a large enough mass to compensate for the thinness, the transmission loss is sufficiently large, and a high sound insulation effect is obtained.
[0028]
On the other hand, the cement-based porous sound-absorbing plate 32 is obtained by pulverizing styrene foam, adjusting the hardness, particle size, and specific gravity by reducing the volume of hot air, and hardening and molding with a cement paste. , And serves to prevent reflection of noise that is projected when the train travels.
[0029]
Specifically, as such a cement-based porous sound-absorbing plate 32, 0 to 40 parts by mass of an inorganic powder, 25 to 40 parts by mass of water, and 0 to 0. 5 parts by mass and 0 to 0.2 parts by mass of a methylcellulose-based thickener, 100 parts by volume of the binder adjusted to be 0.1 to 2 mm in the first ultralight aggregate having a particle size of 0.1 to 2 mm. On the other hand, a kneaded product obtained by uniformly kneading 200 to 650 parts by volume of an ultralight aggregate prepared by adjusting a second ultralight aggregate having a particle size of 2 to 5 mm to be 0 to 50% by mass is formed in a mold. A sound-absorbing plate which is hardened after being subjected to pressure molding and has a continuous gap in the sound-absorbing plate of 15 to 45% of the volume of the sound absorbing plate.
[0030]
According to such a cement-based porous sound-absorbing plate 32, since it has complicated and continuous voids inside, excellent sound-absorbing performance with a large flow resistance can be obtained. In addition, since aggregates with different particle sizes are mixed and used as an ultra-lightweight aggregate mixture, the sound absorption performance and performance rate can be controlled by changing the shape of the voids formed inside the sound absorbing plate in a complicated manner. Becomes possible. Further, since the ultra-light aggregates are bonded to each other by a binder mainly composed of cement, the aggregates are excellent in mechanical strength and can stand alone without using a special support member.
[0031]
Here, as the first ultra-light aggregate and the second ultra-light aggregate, excellent workability due to weight reduction of the member, prevention of separation of the cement-based binder and the aggregate, uniformity of the binder, From the viewpoint of realizing a proper mixing and increasing the mechanical strength of the foamed synthetic resin, (1) a pulverized product of the foamed synthetic resin and (2) a pulverized product of the foamed synthetic resin, respectively, and the surface is made of inorganic powder. Selected from the group consisting of: (3) a pulverized product of a foamed synthetic resin heated and reduced in volume; and (4) a pulverized product of a foamed synthetic resin subjected to coarse pulverization and heat reduction. It is preferable to mix one or more of these.
[0032]
Further, from the viewpoint of improving the molding characteristics when the mixture is subjected to pressure molding and improving the bending strength of the obtained cement-based porous sound absorbing plate 32, polypropylene fiber, polyvinyl alcohol fiber, carbon fiber , Aramid fiber, steel fiber and stainless fiber, it is preferable to add a total of 0.05 to 1.0 parts by mass of one or more fibers selected from the group consisting of fibers.
[0033]
On the other hand, as shown in FIGS. 3 and 4, the air layer 33 is configured to be secured as a hollow region formed between the sound insulating plate 31 and the cement-based porous sound absorbing plate 32.
[0034]
According to the plate-like member 3 for a soundproof wall having the air layer 33 in the present embodiment, compared to the plate-like member 3 for a soundproof wall without the air layer 33, a sufficient amount for a lower frequency can be obtained. It is possible to exhibit a sound absorbing effect.
[0035]
Therefore, the plate-like member 3 for the soundproof wall having the air layer 33 in the present embodiment can reduce the motor noise when the train runs, the rolling noise generated between the wheels and the rails, and the squeak noise when passing through a sharp curve. It can be said that it is suitable for absorbing sound effectively.
[0036]
Regarding the influence of such an air layer 33 on the sound absorbing effect of the plate member 3 for a soundproof wall, three types of plate shapes for the soundproof wall having different conditions (the presence or absence of an air layer and the thickness of the air layer) are changed. When the relationship between the reverberation chamber method sound absorption coefficient and the frequency of the test piece of the member 3 was examined by an experiment, the result shown in FIG. 5 was obtained.
[0037]
In this experiment, all the test pieces used had a cement-based porous sound absorbing plate having a thickness of 60 mm. Specimen 1 is a plate-like member for a soundproof wall without an air layer. Specimen 2 is a plate-like member for a soundproof wall with an air layer. The thickness of the air layer is 10 mm. Specimen 3 is a plate-like member for a soundproof wall having an air layer, and the thickness of the air layer is 24 mm.
[0038]
According to the figure, it is understood that each specimen has almost the same performance in terms of the reverberation chamber method sound absorption coefficient. In addition, according to the figure, it is understood that the plate-shaped member for the soundproof wall having the air layer exhibits a greater sound absorbing effect at a frequency equal to or lower than the peak frequency as compared with the member without the air layer. . Furthermore, a plate-like member for a soundproof wall having an air layer, in which the thickness of the air layer is large, exhibits a greater sound absorbing effect at frequencies below the peak frequency, as compared with the thinner one. It is understood.
[0039]
Therefore, according to this experiment, as in these three types of specimens, the sound source was made into a plate-like member for a soundproof wall in which conditions such as the presence or absence of an air layer and the thickness dimension of the air layer were appropriately adjusted. It can be said that it was confirmed that the sound absorption performance could be designed in accordance with the frequency characteristics of.
[0040]
As described above, according to such a soundproof wall, since the soundproof wall is configured to include the plate member 3 for the soundproof wall, not only the part performing the sound absorbing function but also the part performing the sound insulating function in the field is provided. It is possible to sufficiently contribute to the simplification and speeding up of the mounting operation.
[0041]
Therefore, according to this, it is possible to reliably obtain a soundproof wall having excellent sound absorbing properties and sound insulating properties in an extremely short time.
[0042]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the plate-shaped member for soundproof walls and the soundproof wall according to the present invention, a soundproof wall having excellent sound absorbing and sound insulating properties can be reliably obtained in an extremely short time.
[Brief description of the drawings]
FIG. 1 is a diagram showing the overall configuration of a soundproof wall according to an embodiment of the present invention (FIG. 1 (a) is a front view, FIG. 1 (b) is a plan sectional view, and FIG. 1 (c) is a longitudinal sectional view. 1 (d) is a rear view).
FIGS. 2A and 2B are views showing the entire configuration of a sound-insulating wall plate member applied to the sound-insulating wall according to one embodiment of the present invention (FIG. 2A is a front view, and FIG. FIG. 2C is a longitudinal sectional view, and FIG. 2D is a rear view.
FIG. 3 is a diagram showing a partial configuration of a plate member for a soundproof wall applied to the soundproof wall according to one embodiment of the present invention (FIG. 3A is a plan sectional view, and FIG. 3B is a plan view). FIG. 3C is a cross-sectional view, and FIG.
FIG. 4 is a plan sectional view showing a partial configuration of the soundproof wall according to one embodiment of the present invention.
FIG. 5 is a graph showing experimental results of a plate member for a soundproof wall according to one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 1a Stiffener 2 Support 2a End plate 2b Bolt hole 2c Bolt hole 3 Plate member 31 for soundproof wall 31 Sound insulating plate 32 Cement-based porous sound absorbing plate 33 Air layer 34 Outer frame 41 Positioning member 42 Bolt and nut 43 Buffer member 51 Cushioning material

Claims (2)

The sound insulating plate and the cement-based porous sound-absorbing plate using styrene foam as an aggregate are stacked on the outer peripheral frame, and an air layer is secured between the sound insulating plate and the cement-based porous sound-absorbing plate. Features,
Plate member for soundproof wall. Supports that are erected at appropriate intervals along the center of the wall,
A plate-like member according to claim 1, which is mounted between the columns.
Soundproof wall.

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