KR20130084430A - Sound absorptive assembly applied to sound barrier tunnel for noise reduction - Google Patents

Abstract

The present invention is to provide a sound absorbing tunnel for the sound-absorbing tunnel to reduce the discharge noise of the soundproof tunnel can significantly reduce the length of the tunnel, the specific means of the present invention, the soundproof tunnel side of the road or bridge A sound absorbing body provided in a roof member, wherein the sound absorbing body is provided in the direction perpendicular to the traveling direction of the vehicle; The sound absorbing body includes: a front plate having a U-shaped cross-section as a whole and having a plurality of sound absorbing holes perforated therein; A back plate having a U-shaped cross-section with a lip having a size such that a predetermined gap can be formed between the flange portions protruding from both ends of the front plate, and having a plurality of sound absorbing holes perforated; And a sound absorbing material installed in a space between the front plate and the back plate to absorb and reduce the noise introduced through the sound absorbing holes formed in the front plate and the back plate.

Description

Sound absorptive assembly for soundproof tunnel to reduce discharge noise {Sound absorptive assembly applied to sound barrier tunnel for noise reduction}

The present invention relates to a sound absorber installed in a soundproof tunnel of a road or a bridge, and more particularly, to a sound absorber for a soundproof tunnel for reducing the discharge noise, which can significantly reduce the length of the tunnel by reducing the discharge noise of the soundproof tunnel.

The best way to reduce traffic noise is to eliminate or reduce noise sources, but indirect ways of blocking or dispersing noise propagation paths should be used if the sources of noise cannot be fundamentally blocked, such as roads and railroad tracks. Representative noise countermeasures by path blocking include soundproof walls and soundproof tunnels (tunnel type soundproof walls).

The soundproof wall has a noise attenuation effect by using the negative diffraction attenuation characteristic that makes the transmission path long by installing obstacles on the noise transmission path, so that the noise is not transmitted directly but through the bypass path. Soundproof walls are generally composed of three parts: foundation, strut, soundproof plate, and the strut is fixed with anchor bolts on the foundation installed on the ground, so that the soundproof plate is fixed to the strut with clips and bolts. The soundproof wall is a method of reducing the noise by using the attenuation of the separation distance of the noise in terms of noise. Therefore, the sound barrier cannot directly reduce the area where the noise is directly reached or diffracted. The damping effect of the soundproof wall is generally estimated to be about 10dB and up to 20dB if it has a reasonable height and length. However, a maximum attenuation of 20dB is almost impossible. Therefore, if the reduction target exceeds this, other measures should be taken.

The demand for soundproof tunnels is increasing in accordance with the environmental standards for noise, which overcome the limitations of the noise damping effect of soundproof walls. The soundproof tunnel is a representative method to increase the noise attenuation effect by minimizing the influence of diffraction sounds generated in the upper and lower parts of the existing soundproof walls. The soundproof tunnel is a method that completely surrounds and blocks the propagation path of noise, which can almost ignore the direct transmission or diffraction of the sound, and only consider the transmission by transmission. On the other hand, in the case of the soundproof tunnel, it is necessary to devise a method to reduce the noise at the entrance and exit part because the extension of the soundproof tunnel is determined due to the noise problem at the entrance and exit part, and thus greatly affects the economics.

The present invention proposes a sound absorbing tunnel for the soundproof tunnel to significantly reduce the length of the soundproof tunnel, Korean Patent No. 711233 'Noise reduction soundproof tunnel and its construction method' as the prior art to the background of the present invention is There is (patent document 1). This patent is made of a predetermined height and width at regular intervals in the center, and a pair of foundation concrete layer is cured concrete; A base plate fixed to each of the base concrete layers with anchor bolts; An H beam fixedly installed with bolts and nuts in an arc shape across the respective base plates; A roofing panel fixedly installed at an upper end of the H beam by a bolt and a nut, the roof panel comprising a transparent panel and an exterior panel; A wall panel fixed to the H beam positioned at the lower end of the roof panel by bolts and nuts, the wall panel including an exterior panel and a transparent panel; A built-in panel fixed to the inside of the H beam by bolts and nuts; It proposes a soundproof tunnel for noise reduction consisting of a noise shield plate is fixed to the inside of the upper end of the H-beam bolts and nuts. This patent is characterized by solving the noise increase problem in the soundproof tunnel by installing a noise shield inside the soundproof tunnel. However, this registered patent has only a primary sound absorbing member of the noise shield plate is installed locally has a limit in noise reduction.

Republic of Korea Patent No. 728233, filed on July 28, 2006, registered on April 24, 2007 Republic of Korea Patent No. 657172, filed Aug. 16, 2005, Dec. 7, 2006 Republic of Korea Patent No. 707596, filed March 10, 2005, filed April 5, 2007

An object of the present invention is to provide a sound absorbing body for a soundproof tunnel for reducing the discharge noise that can significantly reduce the length of the tunnel by reducing the discharge noise of the soundproof tunnel.

In addition, an object of the present invention is to provide a sound absorbing body for soundproof tunnel for reducing the discharge noise that can be easily applied even when the roof member is composed of a circular steel pipe.

In order to achieve the above object,

In the sound absorbing body provided on the soundproof tunnel side roof member of a road or a bridge,

The sound absorbing body is installed in the roof member in a direction perpendicular to the traveling direction of the vehicle;

The sound absorbing body,

A front plate having a U-shaped cross-section as a whole and having a plurality of sound absorbing holes perforated therein;

A back plate having a U-shaped cross-section with a lip having a size such that a predetermined gap can be formed between the flange portions protruding from both ends of the front plate, and having a plurality of sound absorbing holes perforated; And

It is installed in the space between the front plate and the back plate is characterized in that it comprises a sound absorbing material for absorbing and reducing the noise introduced through the sound absorbing hole formed in the front plate and the back plate.

In addition, the present invention is characterized in that it further comprises a spacer provided between the sound absorbing material and the back plate to form an air layer therebetween.

In addition, the roof member is provided with a sound absorbing body of the present invention,

A phase current having a constant curvature;

A lower chord spaced at a distance with the same or different curvature as the upper chord;

A plurality of inclined abdominal members which connect the upper chord and the lower chord with each other and have a constant inclination with respect to their member axes;

The upper chord, lower chord and the inclined wear member is characterized in that consisting of a steel pipe.

In addition, the roof member on which the sound absorbing body is installed is characterized in that it is composed of steel having an I-type or H-shaped cross-sectional structure.

In addition, in the present invention, the sound absorbing body is coupled over the entire length of the roof member and installed on every frame of the frame at the entrance and exit side based on the entire extension of the soundproof tunnel, and at the center portion of the frame, across three or four frames. It is characterized in that the installation is densely installed on the entry and exit side.

According to the sound absorbing body for the soundproof tunnel for reducing the discharge noise of the present invention, the noise is introduced into the sound absorbing material through the sound absorbing hole of the front plate and the back plate, and some of the reflected noise is re-absorbed in the air layer to improve sound absorption performance. do.

In addition, by closely disposing the gap in the entrance and exit portion along the length of the tunnel on the inner surface side of the roof and widening the gap in the center portion, it is possible to reduce the number of installations and to maximize noise absorption.

In addition, by maximizing the noise absorption can reduce the length of the tunnel can reduce the construction cost.

In addition, since the sound absorbing body for the soundproof tunnel has a structure installed in the truss-type roof member made of a circular steel pipe, it is possible to additionally implement a light weight soundproof tunnel.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
1 is an exploded perspective view of a sound absorbing body for a soundproof tunnel according to an embodiment of the present invention,
Figure 2 is an assembled cross-sectional view of Figure 1 of FIG.
3 is a perspective view showing a soundproof tunnel installed on a roadside;
Figure 4 (a) is a front view showing the frame of the soundproof tunnel in Figure 3,
4B and 4C are cross-sectional views taken along lines AA and BB of FIG. 4,
4 (D) is a cross-sectional view showing a modified cross-sectional structure of the roof member,
5a is a front view in which a sound absorbing body for a soundproof tunnel is installed on a roof member;
5B is a cross-sectional view taken along line CC of FIG. 5A;
5C is a cross-sectional view in which a sound absorbing body for a soundproof tunnel is installed in a modified cross-sectional structure of a roof member.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

Sound absorbing body for the soundproof tunnel according to the present invention can be applied to both the soundproof tunnel installed on the roadside or the soundproof tunnel installed on the bridge. Sound absorbing body for the soundproof tunnel can be applied in the same configuration, regardless of the installation place will be described in detail below for the embodiment installed on the road.

As shown in FIGS. 1 and 2, the sound absorbing body 60 for the soundproof tunnel is composed of a front plate 61, a back plate 62, and a sound absorbing material 63.

The front plate 61 has a U-shaped cross-sectional shape as a whole and a plurality of sound absorbing holes 61a are perforated. The back plate 62 has a U-shaped cross-section with a lip and has a size such that a constant gap can be formed between the flange portion 611 formed to protrude from both ends of the front plate 61, and a plurality of sound absorbing holes ( 62a) is perforated. The sound absorbing material 63 is installed in the space between the front plate 61 and the back plate 62 to absorb and reduce the noise introduced through the sound absorbing holes 61a and 62a formed in the front plate 61 and the back plate 62. Let's do it. The sound absorbing material 63 may be made of glass wool, soft polyurethane foam, gypsum board, felts, fabrics, fibers and the like and any material having sound absorbing properties known in the art.

In this case, the spacer 64 may be further disposed between the sound absorbing material 63 and the back plate 62 to form an air layer therebetween. Therefore, the noise introduced through the sound absorbing hole 62a formed in the back plate 62 is absorbed by the sound absorbing material 63 and some of the reflected noise is reabsorbed in the air layer to increase the sound absorbing performance of the sound absorbing body 60. The spacer 64 may have a rectangular pillar shape as shown in the drawings, and a plurality of spacers 64 may be installed at regular intervals along the height direction of the back plate 62.

Sound-absorbing body 60 for the soundproof tunnel configured as described above is coupled over the entire length of the roof member 22 of the soundproof tunnel shown in FIG. 3, and installed in each frame frame on the entry and exit side based on the total extension of the soundproof tunnel. And it is preferred that the central side is densely installed at the entrance and exit side in such a way that the three or four across the frame frame 20 is installed.

Here, the frame frame 20 is a truss-shaped roof member 22 connecting the steel pipe pillars 21 and 21 facing each other with the steel pipe pillars 21 installed at regular intervals as shown in FIG. 5A. Means). Soundproof tunnel shown in Figure 3 is one illustrated form and the sound absorbing body 60 for the soundproof tunnel of the present invention can be applied to any other soundproof tunnel not shown.

The sound absorbing body 60 for the soundproof tunnel installed as described above is installed in the roof member 22 in a direction perpendicular to the traveling direction of the vehicle as shown in FIG. 5A. At this time, looking at the installation structure of the sound-absorbing body 60 for the soundproof tunnel, as shown in Figure 5b on both sides of the inclined wear member 223 between the upper chord 221 and the lower chord 222 of the truss-shaped roof member 22. It is installed to absorb and attenuate the noise emitted from the soundproof tunnel. The installation method uses a gap formed by coupling the front plate 61 and the back plate 62 to the protruding vanes 221b and 222b coupled to the upper chord 221 and the lower chord 222 as shown in FIG. 5B. In the state in which the front plate 61 is in contact with the protruding wings 221b and 222b, the bolts may be penetrated and coupled by fastening the nuts.

On the other hand, look at the structure of the soundproof tunnel illustrated in the present embodiment in more detail, the foundation concrete 10 is installed along both sides of the road, the steel pipe pillars 21 which are respectively erected perpendicularly to the foundation concrete 10, and each other Comprising a truss-shaped roof member 22 connected to the upper end of the steel pipe pillar 21 facing each other, a plurality of frame frames 20 to form the skeleton of the soundproof tunnel, connecting the two adjacent frame frames 20 to each other It consists of a brace 30, a roof soundproofing plate 40 installed between the truss-shaped roof member 22 and a side soundproofing plate 50 provided between the steel pipe column 21. The side sound insulation board 50 is composed of a bottom side sound insulation board 51 composed of sound absorbing or reflective sound insulation panels and an upper side sound insulation board 52 composed of sound insulation plates made of the same material as the roof sound insulation pipe 40.

That is, the illustrated soundproof tunnel is provided with a frame frame 20 composed of a steel pipe column 21 and a truss-shaped roof member 22 at a predetermined interval on the foundation concrete 10 and the plurality of frame frames 20 are braces 30 It is connected to each other by) and behaves integrally against the external force, and the soundproof plates 40 and 50 are installed on the roof and the side to block the noise generated inside the soundproof tunnel.

Here, a circular steel pipe having a circular cross section is shown as a steel pipe column 21 in the drawing, but the present invention is not limited to this cross-sectional shape. However, the steel pipe is a structural member which has no direction when stress is applied, and it is more efficient as a pillar member than the H-shaped steel having directionality. By constructing the column as a steel pipe, the steel pipe can secure the required strength with a smaller amount of steel, thereby making the structure lighter. It can be chosen with its advantages.

The roof member 22 is combined to have a shape similar to that of a truss using a steel pipe as shown in FIG. 5B. The roof member 22 has a curvature equal to that of the upper chord 221 and the upper chord 221 and is spaced apart by a predetermined distance. The current 222 and the upper chord 221 and the lower chord 222 are connected to each other and is composed of a plurality of inclined recovery member 223 having a constant inclination with respect to the member axis.

Both ends of the upper chord 221 and the lower chord 222 constituting the truss type roof member 22 are hinged to the steel pipe column 21 to form a unit frame frame of the soundproof tunnel. However, the present invention is not limited to a structure in which the steel pipe column 21 and the truss-shaped roof member 22 are simply joined, and they may be steel-bonded or semi-steel-joined to constitute a ramen frame as a whole.

As described above, the sound absorbing body 60 for the soundproof tunnel has a structure that can be symmetrically disposed on the front and rear surfaces of the roof member 22, thereby simplifying the installation structure.

In addition, the noise introduced through the sound absorbing hole 62a formed in the back plate 62 is absorbed by the sound absorbing material 63, and some of the reflected noise is reabsorbed in the air layer to absorb the sound absorbing performance of the sound absorbing body 60 for the soundproof tunnel. Is raised

On the other hand, the noise generated by the vehicle is a directional sound source, which causes the greatest noise when the traveling noise of the vehicle and the reflected noise in the tunnel are discharged from the inlet and outlet when passing through the soundproof tunnel, increasing the damage to the surrounding private houses. This will require more extension of the soundproof tunnel, which will increase the cost of construction. However, in the present invention, the sound absorbing body 60 is installed in the truss-shaped roof member 22 as shown in FIG. 5A, and in particular, the sound absorbing body 60 is installed at right angles to the vehicle traveling direction to block the noise at the top of the noise progressing path and at the same time. Reflective noise can be absorbed. Therefore, the discharge noise of the tunnel inlet and outlet can be effectively reduced, and the length of the soundproof tunnel can be drastically reduced, thereby lowering the construction cost, thereby enabling economical construction.

Meanwhile, the roof member 22 on which the sound absorbing body 30 is installed may be formed of steel having an I-type or H-type cross-sectional structure as shown in FIG. 5C.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

22: roof member
221: present
222: the present
223: warp member
60: Sound absorbing body for soundproof tunnel
61: front panel
61a, 62a: sound absorbing hole
62: back plate
63: sound absorbing material
64: spacer

Claims (5)

In the sound absorbing body provided on the soundproof tunnel side roof member of a road or a bridge,
The sound absorbing body 60 is installed in the roof member 22 in the direction perpendicular to the traveling direction of the vehicle;
The sound absorbing body 60,
A front plate 61 having a U-shaped cross-section and having a plurality of sound absorbing holes 61a formed therein;
It has a U-shaped cross-section with a lip and has a size such that a constant gap can be formed between the flange portion 611 formed to protrude from both ends of the front plate 61, and a plurality of sound absorbing holes 62a are perforated. Back plate 62; And
Sound absorbing material 63 is installed in the space between the front plate 61 and the back plate 62 to absorb and reduce the noise introduced through the sound absorbing holes (61a, 62a) formed in the front plate 61 and the back plate 62 Sound-absorbing body for soundproof tunnel for reducing the discharge noise, comprising a. The method of claim 1,
Sound absorbing material for a soundproof tunnel for reducing the discharge noise, characterized in that it further comprises a spacer (64) installed between the sound absorbing material (63) and the back plate (62) to form an air layer therebetween. The method of claim 1,
The roof member 22 on which the sound absorbing body 30 is installed,
An image chord 221 having a constant curvature;
A lower chord 222 spaced at a predetermined distance with the same or different curvature as the upper chord 221;
A plurality of inclined restraining members 223 connecting the upper chord 221 and the lower chord 222 to each other and having a predetermined inclination with respect to their member axes;
The upper chord 221, the lower chord 222 and the inclined wear member 223 is a sound absorbing body for a soundproof tunnel for reducing the discharge noise, characterized in that consisting of a steel pipe. The method of claim 1,
Sound absorbing body 30 is a sound absorbing body for the sound-proof tunnel for the discharge noise reduction, characterized in that the roof member 22 is formed of steel having an I-type or H-shaped cross-sectional structure. The method of claim 1,
The sound absorbing body 60 is coupled over the entire length of the roof member 22, and is installed at every entrance frame at the entrance and exit side based on the entire extension of the soundproof tunnel, and at the center side, one frame frame is crossed three or four. Sound absorbing body for a soundproof tunnel for reducing the discharge noise, characterized in that the densely installed on the entry and exit side by installing in.

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