JP2017166274A - Sound insulation equipment for tunnel buffering work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sound insulation equipment for tunnel buffering work that can reduce a travel sound of a train radiated from an opening part of tunnel buffering work without spoiling reduction effect on a tunnel fine atmospheric pressure wave.SOLUTION: Providing tunnel buffering work 1 with a sound insulation equipment 100 having a plate-like member 20, made at least partially of a porous material, arranged to shield a part of an opening part 2, the plate-like member 20 absorbs vibrations of air passing through the opening part 2 and then noise such as a travel sound of a train radiated from the opening part 2 can be reduced. Although the sound insulation equipment 100 is provided at the opening part 2 of the tunnel buffering work 1, the opening part 2 is not completely closed and ventilation characteristics are secured, so that reduction effects on a tunnel fine atmospheric pressure wave are not spoiled. Namely, this sound insulation equipment 100 can reduce the noise such as the travel sound of the train radiated from the opening part 2 of the tunnel buffering work 1 without spoiling the reduction effects on the tunnel fine atmospheric wave.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sound insulation device for a tunnel shock absorber installed in a tunnel shock absorber for reducing impact sound caused by tunnel micro-pressure waves.

When a high-speed train enters the tunnel, a compression wave is formed in front of the train. While this compression wave propagates through the tunnel, the pressure gradient becomes steep, and it is emitted as a micro-pressure wave from the tunnel exit, rarely generating a shocking sound, and nearby houses rattling with vibration. There are things to do. In order to reduce the impact sound caused by the tunnel micro-pressure wave, the tunnel entrance and exit of the tunnel is provided with a hood-like tunnel cushioning structure having an internal space larger than the cross-sectional area of the tunnel.
For example, as shown in FIG. 8, an opening 2 communicating with the internal space is formed on the wall surface of the tunnel buffer 1 and the tunnel 2 can be effectively tunneled by forming the opening 2 in an appropriate arrangement. The micro-pressure wave is reduced to prevent the house from rattling due to impact sound or vibration (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 10-317896

  However, although the impact sound due to the tunnel micro-pressure wave is reduced by such a tunnel buffer 1, the train released from the opening 2 of the tunnel buffer 1 due to a further increase in the speed of the recent train, etc. Running noise sometimes became noise.

  An object of the present invention is to provide a sound insulation device for a tunnel shock absorber that can reduce the running sound of a train emitted from the opening of the tunnel shock absorber without impairing the effect of reducing the tunnel micro-pressure wave. .

In order to achieve the above object, the present invention
A sound insulation device for a tunnel shock absorber that reduces the running noise of a train emitted from an opening formed in a wall surface of the tunnel shock absorber for reducing tunnel micro-pressure waves,
A frame provided along an edge of the opening;
A plate-like member disposed on the inner surface of the frame so as to block a part of the opening;
I was prepared to.

In the soundproofing device for a tunnel shock absorber having such a configuration, the plate-like member disposed on the inner surface of the frame body along the edge of the opening portion is shielded so as to partition a part of the opening portion. The vibration of the air transmitted from the inside to the outside through the opening, that is, a part of the sound can be blocked, and the running noise of the train released from the opening can be reduced.
In particular, even if this sound insulation device for tunnel shock absorbers is provided at the opening of the tunnel shock absorber, the opening is not completely blocked and air permeability is ensured, reducing tunnel micro-pressure waves. The effect is not impaired.
In other words, with this tunnel buffering soundproofing device, it is possible to reduce noise such as traveling sound emitted from the opening of the tunnel buffering work without impairing the effect of reducing the tunnel micro-pressure wave.

Also, preferably
At least a part of the plate-like member is made of a porous material.
A porous material having innumerable gaps and open cells functions as a sound absorbing material that reduces sound transmission by absorbing vibrations of air, so that at least a part of the plate-like member is made of a porous material. If so, the vibration of the air passing through the opening can be absorbed by the plate-like member, and the traveling noise of the train released from the opening can be suitably reduced.
Note that a sound absorbing material (porous material) may be attached to a plate-like member that is not a porous material.

Also, preferably
The plate-like member is provided in an arrangement in which the inside of the tunnel cushioning can not be seen through the opening from the living area side near the tunnel cushioning.
If it is a soundproofing device for tunnel shock absorbers where the plate-like member is fixed to the frame so that the inside of the tunnel shock absorbers is not visible, the train released from the opening of the tunnel shock absorbers The running noise is not directly directed to the living area.
If it is such a sound insulation device for a tunnel shock absorber, the vibration of the air that tries to pass through the opening toward the direction of the living area is received by the plate surface of the plate-like member, and the vibration is satisfactorily absorbed. Therefore, it is possible to suitably reduce noise such as running noise emitted from the opening of the tunnel buffer work toward the living area.
For example, a plurality of plate-like members are arranged in a wing plate shape (louver shape) in a sound insulation device for a tunnel shock absorber, and when the sound insulation device for a tunnel shock absorber is viewed from the living area side, If the orientation is such that the inside is hidden so that the inside cannot be seen, noise such as running noise observed on the residential area side can be reduced more favorably.

Also, preferably
The frame body is provided in contact with an edge of the opening.
In this way, by making the frame inscribed in the edge of the opening, it can be attached to the opening so that the frame through which the opening is inserted from the inside of the tunnel cushioning work can be attached to the opening. It becomes possible to install the soundproofing device for tunnel shock absorber in the opening from the inside of the tunnel shock absorber.
For example, even if the land outside the tunnel buffer is narrow and it is difficult for workers to enter, or even if the tunnel buffer is installed on the overhead, the tunnel buffer The soundproofing device can be suitably installed at the opening of the tunnel shock absorber.

  ADVANTAGE OF THE INVENTION According to this invention, the running sound of the train discharge | released from the opening part of a tunnel shock absorber can be reduced, without impairing the reduction effect of a tunnel micro atmospheric pressure wave.

It is a perspective view which shows the tunnel shock absorber in which the soundproofing device for tunnel shock absorbers of this embodiment is installed in the opening part. It is a perspective view which shows the sound insulation apparatus for tunnel shock absorbers of this embodiment. It is a perspective view which shows the modification of the sound insulation apparatus for tunnel shock absorbers. It is a perspective view which shows the modification of the sound insulation apparatus for tunnel shock absorbers. It is a perspective view (a) (b) which shows the modification of the soundproofing device for tunnel shock absorbers. It is a perspective view which shows the modification of the sound insulation apparatus for tunnel shock absorbers. It is a perspective view which shows the modification of the sound insulation apparatus for tunnel shock absorbers. It is explanatory drawing regarding a tunnel buffer work.

  Hereinafter, embodiments of a sound insulation device for a tunnel shock absorber according to the present invention will be described in detail with reference to the drawings. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

For example, as shown in FIG. 1, a tunnel buffer 1 having an inner space wider than the cross-sectional area of the tunnel T is provided at the entrance and exit of the tunnel T. The tunnel buffer 1 is provided to reduce tunnel micro-pressure waves.
An opening 2 that communicates with the internal space is formed on the wall surface of the tunnel shock absorber 1, and the tunnel shock absorber soundproof device 100 is provided in the opening 2.

  As shown in FIG. 2, a tunnel shock absorber soundproofing device 100 (hereinafter referred to as a soundproofing device 100) of the present embodiment includes a frame body 10 provided along the edge of the opening 2, and an inner surface of the frame body 10. The plate-like member 20 is provided.

The frame body 10 is a member formed by assembling four plate members disposed at the edge of the opening 2 having a substantially rectangular shape into a substantially rectangular tube shape.
The frame body 10 is made of, for example, a metal plate material or a resin plate material, and is assembled in a substantially rectangular tube shape having rigidity using an L-shaped sheet metal or a screw (not shown).
The frame body 10 is fixed to the tunnel buffer 1 by an L-shaped metal plate, an anchor bolt, a filling adhesive or the like (not shown).

The frame body 10 of the soundproofing device 100 of the present embodiment is formed in a size that is inscribed in the edge of the opening 2.
By adopting a structure in which the frame 10 is inscribed in the edge of the opening 2, the frame 10 having the opening 2 inserted from the inside of the tunnel buffer 1 can be attached to the opening 2 so as to protrude outward. Therefore, the soundproofing device 100 can be installed in the opening 2 from the inside of the tunnel buffer 1.
In this way, even if the land outside the tunnel buffer 1 is narrow and it is difficult for an operator to enter, or when the tunnel buffer 1 is provided on an elevated route, In operation, the soundproofing device 100 can be suitably installed in the opening 2 of the tunnel buffer 1.
In addition, even if the frame 10 is not the size inscribed in the edge of the opening 2, the soundproofing device 100 can be installed outside the tunnel buffer 1 by constructing a scaffold from the inside of the tunnel buffer 1. It is.

The plate-like member 20 is disposed on the inner surface of the frame body 10 so as to block a part of the opening 2.
In the soundproofing device 100 shown in FIG. 2, a plate-like member 20 that extends over the frame 10 and a plate-like member 20 that extends over the left and right of the frame 10 are disposed on the inner surface of the frame 10. The two plate-like members 20 assembled in a cross shape are fixed to the frame body 10.
The plate-like member 20 is fixed to the inner surface of the frame body 10 using, for example, an L-shaped metal plate or a screw (not shown).

At least a part of the plate-like member 20 is made of a porous material.
The porous material having innumerable gaps and open cells functions as a sound absorbing material that reduces sound transmission by absorbing air vibrations.
For example, if the porous material has high strength such as metal or ceramic, the plate-like member 20 made of a single porous material can be disposed on the inner surface of the frame body 10.
In the case of a porous material having flexibility such as urethane foam (foamed urethane) such as maltoprene, a plate-like member integrated by sticking the porous material to a core material such as a metal plate or a resin plate What is necessary is just to arrange | position 20 to the inner surface of the frame 10.
In addition, the thickness of the plate-shaped member 20, especially the thickness of the porous material constituting the plate-shaped member 20, is arbitrary, and the noise is suppressed to a regulation value or less according to the magnitude or sound range of the noise generated in the opening 2. The size should be suitable for

If such a soundproofing device 100 is provided in the opening 2 of the tunnel shock absorber 1, the train released from the opening 2 by the plate-like member 20 absorbing the vibration of the air passing through the opening 2. Noise such as running noise can be reduced.
In particular, even if the soundproofing device 100 is provided in the opening 2 of the tunnel shock absorber 1, the opening 2 is not blocked and air permeability is ensured. It is not damaged.
That is, with the soundproofing device 100 of the present embodiment, it is possible to reduce the traveling sound of the train emitted from the opening 2 of the tunnel buffer 1 without impairing the effect of reducing the tunnel micro-pressure wave.

  In the soundproofing device 100 shown in FIG. 2, the case where the two plate-like members 20 are assembled in a cross shape has been described as an example. However, the number of plate-like members 20 laid over the frame body 10 and the frame The number of the plate-like members 20 that span the left and right sides of the body 10 is arbitrary, and a plurality of plate-like members 20 assembled in a lattice shape may be disposed in the frame body 10.

Further, the present invention is not limited to the above embodiment.
For example, as shown in FIGS. 3 and 4, a soundproof device 100 in which two plate-like members 20 spanned on the left and right of the frame body 10 are fixed to the inner surface of the frame body 10 may be used.
The plate-like member 20 of the soundproofing device 100 shown in FIG. 3 and FIG. 4 is provided in an arrangement in which the inside of the tunnel shock absorber 1 cannot be seen through the opening 2 from the living area side near the tunnel shock absorber 1.
If the plate-like member 20 is fixed to the frame 10 so as to be hidden from view so that the inside of the tunnel shock absorber 1 cannot be seen, the traveling sound of the train emitted from the opening 2 of the tunnel shock absorber 1 can be heard. Difficult to release directly in the direction of the residential area.

In the soundproofing device 100 shown in FIG. 3, the plate-like member 20 is fixed to the frame body 10 in a posture having an inclined surface that rises from the inside to the outside of the tunnel shock absorber 1.
In other words, in this soundproofing device 100, the plate-like member 20 is in a posture in which the plate surface of the plate-like member 20 is arranged substantially vertically, for example, with respect to the imaginary line L that falls from the inside to the outside of the tunnel buffer 1. It is fixed to the frame 10.
In the soundproof device 100 in which the plate-like member 20 is fixed to the frame body 10 in such an orientation, the vibration of the air that is going to pass obliquely downward from the opening 2 is received by the plate surface of the plate-like member 20. Since the vibration can be satisfactorily absorbed, the running noise of the train released obliquely downward from the opening 2 of the tunnel buffer 1 can be suitably reduced.
For example, when the living area in the vicinity of the tunnel buffer 1 is in a lower direction than the point where the tunnel buffer 1 is provided, the plate surface with respect to the imaginary line L connecting the residential area and the opening 2 By installing the soundproofing device 100 including the plate-like member 20 in a posture in which the vertical direction is arranged in the opening 2, noise such as traveling sound observed on the living area side can be suitably reduced.

In the soundproofing device 100 shown in FIG. 4, the plate-like member 20 is fixed to the frame body 10 in a posture having an inclined surface that descends from the inside to the outside of the tunnel buffer 1.
In other words, in the soundproofing device 100, the plate-like member 20 is in a posture in which, for example, the plate surface of the plate-like member 20 is arranged substantially perpendicularly with respect to the virtual line L rising from the inside to the outside of the tunnel buffer 1. It is fixed to the frame 10.
In the soundproofing device 100 in which the plate-like member 20 is fixed to the frame body 10 in such an orientation, the vibration of the air that attempts to pass obliquely upward from the opening 2 is received by the plate surface of the plate-like member 20. Since the vibration can be absorbed well, the running noise of the train released obliquely upward from the opening 2 of the tunnel buffer 1 can be suitably reduced.
For example, when the residential area in the vicinity of the tunnel buffer 1 is in a higher direction than the point where the tunnel buffer 1 is provided, the plate surface with respect to the virtual line L connecting the residential area and the opening 2 By installing the soundproofing device 100 including the plate-like member 20 in a posture in which the vertical direction is arranged in the opening 2, noise such as traveling sound observed on the living area side can be suitably reduced.

In particular, as in the soundproofing device 100 shown in FIGS. 3 and 4, a plurality of (here, two) plate-like members 20 are arranged in a wing plate shape (louver shape), so that from the living area side. If the inside of the tunnel buffer 1 is not visible when the soundproofing device 100 is visually recognized, noise such as traveling sound observed on the residential area side can be reduced more favorably.
Note that the number of the plate-like members 20 that span the left and right sides of the frame body 10 is not limited to two, and may be one or three or more, and the size of the opening 2 or the frame body 10 An appropriate number of plate-like members 20 may be provided depending on the situation.

Further, as shown in FIGS. 3 and 4, the flat plate-like member 20 is not limited to the inner side of the frame body 10 as shown in FIGS. 5A and 5B. As described above, even when the bent plate-like member 20 is bridged inside the frame body 10, it is possible to suitably reduce the traveling noise of the train emitted from the opening 2 of the tunnel buffer 1. .
Even when the bent plate-like member 20 is used, the plate-like member 20 is arranged at an angle or position where the inner side of the tunnel shock absorber 1 cannot be seen when the soundproofing device 100 is viewed from the living area side. Then, the running sound of the train emitted from the opening 2 can be reduced more favorably.

Further, as shown in FIG. 6, a soundproof device 100 in which three plate-like members 20 that are stretched over the frame 10 are fixed to the inner surface of the frame 10 may be used.
In the soundproofing device 100 shown in FIG. 6, a slat-like plate-like member 20 is fixed to the frame body 10 so that the plate surface is inclined leftward from the inside to the outside of the tunnel buffer 1.
For example, the plate-like member 20 is disposed on the frame body 10 in a posture in which the plate surface is arranged substantially perpendicular to the virtual line L connecting the living area near the tunnel buffer 1 and the opening 2. If it is apparatus 100, noises, such as a running sound observed in the living area side, can be reduced suitably.

In the soundproofing device 100 shown in FIG. 6 as well, a plurality of (here, three) plate-like members 20 are arranged in a wing plate shape (louver shape), so that the soundproofing device 100 is visually recognized from the living area side. When the plate-like member 20 is disposed at an angle or an angle at which the inside of the tunnel buffer 1 cannot be seen, noise such as traveling sound observed on the residential area side can be reduced more favorably. .
Note that the number of the plate-like members 20 that extend across the frame 10 is not limited to three, and may be one, two, or four or more, and the opening 2 or the frame. An appropriate number of plate-like members 20 may be disposed according to the size of 10.

  Similarly, even in the soundproofing device 100 in which the blade-like plate-like member 20 having a posture in which the plate surface is inclined rightward from the inside to the outside of the tunnel shock absorber 1 is fixed to the frame body 10, If the plate-shaped member 20 is blinded so that the interior of the tunnel buffer 1 cannot be seen through the opening 2 from the side of the residential area near the tunnel buffer 1, the traveling sound etc. Noise can be suitably reduced.

Further, as shown in FIG. 7, the plate-like member 20 of the soundproofing device 100 is not limited to the both ends being fixed to the inner surface of the frame 10, and one end is fixed to the frame 10, and the other The plate-shaped member 20 whose end is a free end may be used.
In the soundproofing device 100 shown in FIG. 7, the lower ends of the two plate-like members 20 on both sides are fixed to the frame body 10, and the upper ends thereof are free ends. Moreover, the upper end part of the plate-shaped member 20 distribute | arranged among them is fixed to the frame 10, and the lower end is a free end part.

  In the above embodiment, the frame body 10 of the soundproofing device 100 is formed in a size inscribed in the edge of the opening 2, and the soundproofing device 100 is installed in the opening 2 from the inside of the tunnel buffer 1. However, the present invention is not limited to this. For example, the frame 10 of the soundproofing device 100 has a size larger than the opening 2, and the frame 10 is attached to the outer wall surface of the tunnel buffer 1 so as to surround the opening 2. The soundproofing device 100 may be installed in the unit 2.

In order to further increase the speed of the train in the future, reducing the size (opening ratio) of the opening 2 formed in the tunnel buffer 1 in the initial design may reduce tunnel micro-pressure waves, etc. May be preferable.
In such a case, if the soundproofing device 100 of this embodiment is installed in the opening 2 instead of simply blocking a part of the opening 2, in addition to reducing the opening ratio of the opening 2, Since noise such as train running sound from the opening 2 can be suppressed, the soundproofing device 100 can be used effectively.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Tunnel shock absorber 2 Opening part 10 Frame body 20 Plate-shaped member 100 Sound insulation device (soundproof device) for tunnel shock absorbers
T Tunnel L Virtual line

Claims (4)

A sound insulation device for a tunnel shock absorber that reduces the running noise of a train emitted from an opening formed in a wall surface of the tunnel shock absorber for reducing tunnel micro-pressure waves,
A frame provided along an edge of the opening;
A plate-like member disposed on the inner surface of the frame so as to block a part of the opening;
A soundproofing device for a tunnel buffer, characterized by comprising:   The sound insulation device for a tunnel buffer according to claim 1, wherein at least a part of the plate-like member is made of a porous material.   The said plate-shaped member is provided in the arrangement | positioning which cannot see the inside of the said tunnel shock absorber through the said opening part from the living area side of the vicinity of the said tunnel shock absorber. Sound insulation device for tunnel shock absorbers.   The sound insulation device for tunnel shock absorber according to any one of claims 1 to 3, wherein the frame body is provided in contact with an edge of the opening.

Images