KR101164582B1 - Noise Control Door for Tunnel and Method for Reducing Noise from Tunnel - Google Patents

Abstract

The present invention, in the construction of the tunnel, in order to block the noise generated by the blast, etc. inside the tunnel, by installing a water tube filled with water as a sound insulating material inside the soundproof door installed in the tunnel entrance, to improve the sound insulation performance and At the same time, the present invention relates to a soundproof door and a tunnel blast reduction method using the same, by which the weight of the soundproof door can be reduced and reduced by reducing its weight.

In the present invention, the front plate 11, the back plate 12 and the side plate 13 is provided in the form of a panel having a thickness; In the thickness direction, the soundproof door, characterized in that it is divided into the water filling portion 10, the water filled portion 10, and the noise material filled portion 20 in the thickness direction, and by using it to reduce the blast sound of the tunnel A method is provided.

Description

Noise Control Door Using Water and Tunnel Blasting Reduction Method Using the Noise {Noise Control Door for Tunnel and Method for Reducing Noise from Tunnel}

The present invention relates to a soundproof door and a method for reducing a tunnel blasting sound using the same. More particularly, in the construction of a tunnel, a soundproofing material is installed inside a soundproof door installed at a tunnel entrance to block noise generated by blasting inside the tunnel. Soundproof door and a tunnel blast reduction method using the same to improve the soundproofing performance and to reduce the weight of the soundproof door movement and installation by embedding a water tube filled with water. It is about.

In tunnel construction, the tunnel excavation by blasting is very economical and constructive, so in most tunnel construction, blasting work is performed in tunnel excavation. However, in addition to the excavation of the ground, such blasting work inevitably causes secondary disasters such as vibration, noise, storm pressure, and stone monuments, and in particular, blasting noise directly causes the human body to cause mental pain. This is happening.

Blasting noise is a shock noise with an audible range (20 ~ 20000Hz) among sound waves caused by air vibration. When explosives explode in a charge hole, the shock wave due to the shock pressure propagated three-dimensionally from the source is remarkable with distance. Although reduced, about 0.5-20% of the energy from blasting is transmitted through the air medium outside the crack in the form of a seismic wave.

The bodily effects of blasting noise cannot be expressed quantitatively because they vary the degree of sensory response according to mental pain and biological rhythms caused by human sensation, but in spite of the past decades of mitigation research and countermeasures, Civil disputes are increasing day by day and are subject to restrictions such as suspension of construction and reduction of blasting scale, which is causing serious obstacles to smooth work.

Among blast noises, noise in the low frequency range (“low frequency noise”) is known to adversely affect humans and animals. When low frequency noise is heard, the person's mood is greatly reduced, and animals are stressed and miscarriage. It is known to wear.

As a method for reducing the blasting noise, which has been proposed in the related art, a method of blocking the blasting noise from inside the tunnel by installing a soundproof door at the entrance of the tunnel is widely used. However, until now, no sound insulation measures against low frequency noise have been considered, and light insulation doors of light material have been mainly used. In order to effectively sound low frequency noise, sound doors should be manufactured with heavy weights.In this case, the use of expensive steel materials increases the production cost, and tunnel construction sites are generally mountains or hilly areas. When the soundproof door is made of a heavy weight body, it becomes difficult to transport and install, which increases the cost of tunnel construction and increases the air length.

The present invention has been developed to overcome the limitations of the prior art as described above, in the production of soundproof doors installed at the entrance of the tunnel to block the blasting noise during the construction of the tunnel, while having a sufficient noise capacity for low-frequency noise, It is an object of the present invention to provide a soundproof door and a tunnel blast reduction method using the same, which can prevent the excessive increase to avoid waste of unnecessary materials and minimize the inconvenience of transportation and installation.

In the present invention, in order to achieve the above object, the front plate, the back plate and the side plate having a predetermined thickness has a panel form, the inside is filled with water in the thickness direction, filled with water, and noise material Provided is a soundproof door characterized in that it is divided into a filling material filled with noise, and a tunnel blast sound reduction method using the same is provided.

Specifically, in the present invention, the front plate, the back plate and the side plate comprises a panel form having a thickness; In the thickness direction, the soundproof door is characterized in that it is divided into a water filling portion filled with water, and a noise material filling portion filled with the noise material.

In addition, in the present invention, as a method for reducing the blast sound of the tunnel, the entrance of the tunnel shaft is formed in the form of a panel having a thickness having a front plate, a rear plate and a side plate, the inside is filled with water in the thickness direction Is divided into a water filling portion and a noise filling portion filled with noise material, and a water soundproof door is installed to reduce the blasting noise from inside the tunnel shaft, and the water soundproof door is closed at the edge of the tunnel shaft where the water soundproof door is closed. When the inlet installation frame is in close contact with the back of the rear surface of the water soundproof door is installed, when the inner blasting of the tunnel shaft to close the entrance of the tunnel shaft with the water soundproof door to reduce the tunnel blast generated inside the tunnel shaft A tunnel blast sound reduction method is provided, which is characterized by the above-mentioned.

In the method of reducing the soundproof door and the tunnel blasting sound of the present invention as described above, partition walls are installed in parallel with the front plate and the back plate between the front plate and the back plate in the interior of the soundproof door to distinguish the water filling unit and the noise material filling unit. The water tube is formed in a mat shape having a thickness that is formed in the soundproof door, or expands when water is injected to fill the space between the front plate and the side plate, and the water filling part is formed by the water tube. Can be.

When the water filling part is formed by the water tube, a vertical support plate connected to the rear surface of the water tube so as to stand vertically in the soundproof door and standing vertically inside the soundproof door may be provided.

In addition, in the soundproof door and the tunnel blast reduction method of the present invention as described above, the soundproof door is installed on the edge of the tunnel shaft at the entrance surface of the tunnel shaft so as to be installed to close the tunnel shaft at the entrance of the tunnel shaft when the soundproof door is closed. Inlet installation frame is further provided in close contact with the back of the rear panel of the soundproof door, the hinge member is installed on one side of the soundproof door and the hinge member is coupled to the inlet installation frame, the soundproof door can be configured to open and close in the form of a case. In order to increase the strength of soundproof doors, support frame members are installed between the front and rear plates in the thickness direction inside the soundproof doors, and horizontal frames are installed at the top and bottom of the front and rear plates in the horizontal direction inside the soundproof doors, respectively. Vertically at the edges of the front and back panels, respectively, in the vertical direction inside the soundproof door. This can be installed.

According to the present invention, it is possible to effectively block the low-frequency noise generated by the tunnel blasting. In addition, while exhibiting this noise capability, it is possible to prevent the weight from being excessively increased. In other words, when the soundproof door is used, the water is filled inside to make a considerable weight, which makes an excellent noise effect, but when it is installed and installed in the tunnel construction site, the water is not filled and the weight is reduced to reduce the transport and Discomfort in the installation can be minimized, and the thickness of the steel plate forming the soundproof door itself can be prevented from being excessively thick, thereby avoiding a large material cost.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, this is described as one embodiment, whereby the technical spirit of the present invention and its core configuration and operation are not limited.

FIG. 1 is a schematic perspective view showing a state in which a water soundproof door 1 is installed in a tunnel shaft according to an embodiment of the present invention, and FIG. 2 is a schematic perspective perspective view of the water soundproof door 1. . 3 and 4 are cross-sectional views taken along the line AA of FIG. 2, respectively, and FIG. 5 shows a water soundproof door in order to show the configuration of an embodiment in which a reinforcing frame 30 is installed inside the water soundproof door 1. The exploded perspective view which shows (1) in exploded state is shown.

As shown in the figure, the water soundproof door 1 according to the present invention is formed in the form of a panel having a predetermined thickness having a front plate 11, a rear plate 12 and a side plate 13, the inside of which is the thickness direction In addition, the water filling portion 10 is filled with water, and the noise material filling portion 20 is filled with the noise material used for normal sound insulation, such as polyurethane non-woven fabric or foam. That is, the water 101 is filled from the front plate 11 to the predetermined thickness from the front plate 11 to the predetermined thickness in the water soundproof door 1, and the noise material filling portion from the rear side to the rear plate 12 ( 20) is filled with a noise material 201 commonly used for noise, such as fibers, foams, nonwovens, sponges and the like.

In the embodiment shown in FIGS. 2 and 3, inside the water soundproof door 1, partition walls 14 are arranged between the front and rear plates 11 and 12 in parallel with the front and rear plates 11 and 12. ) Is installed to separate the water filling portion 10 and the noise material filling portion 20, but as shown in Figure 4, using the water tube 16 made of a mat shape having a thickness of water The filling part 10 may be formed. That is, instead of installing the partition 14, the water-proof door 1 has a mat-shaped water tube 16 that fills the space between the front plate 11 and the side plate 13 to a predetermined thickness when inflated. By installing it in, the water filling part 10 is formed.

The water tube 16 may be made of a material that always maintains its shape, but may be made of a soft material such as a rubber tube or a synthetic resin tube that expands when filled with water and does not maintain its shape when there is no water. have. At this time, since the water soundproof door 1 is installed so that the front plate 11 and the rear plate 12 are vertical, if the water tube 16 is made of a soft material that is expanded when the water is injected as above It may be provided with a vertical support plate 17 that is vertically connected to the back of the water tube 16 so that the water tube 16 can also be vertically standing. Of course, the water tube 16 as described above may be used in a state where the partition 14 is installed. When using such a water tube 16, it is possible to prevent the increase in weight due to the installation of the partition 14, it is also easy to waterproof the water filling portion (10).

The front plate 11 is provided with a water inlet 18 and a water outlet 19 to inject water to fill the water filling portion 10, and to discharge the water after use. When the partition wall 14 is installed to form the water filling part 10, the water inlet 18 and the water outlet 19 may be integrally formed in the front plate 11, but as described above, the water tube 16 In this case, the water inlet 18 and the water outlet 19 are attached to the water tube 16 itself, and the water inlet 18 and the water outlet 19 pass through the front plate 11, respectively. A through hole may be formed so that the water inlet 18 and the water outlet 19 are exposed to the outside of the front plate 11 through the through hole. In addition, the water inlet 18 and the water outlet 19 may be provided in the side plate 13 in addition to the front plate (11).

Meanwhile, in order to increase the strength of the water soundproof door 1 according to the present invention, a reinforcement frame 30 may be further installed inside the water soundproof door 1 as necessary. That is, as shown in FIG. 5, the support frame member 31 is provided between the front plate 11 and the rear plate 12 in the thickness direction, and the front plate (in the horizontal direction in FIG. 5) in the horizontal direction (FIG. 5). 11) and the horizontal frame 32 is installed at the top and the bottom of each of the rear panel 12, and left to the front panel 11 and the rear panel 12 in the vertical direction (vertical direction in Fig. 5), respectively. , The vertical frame 33 can be installed on the right side. Through the installation of the reinforcing frame 30 it is possible to further increase the rigidity of the water soundproof door (1) itself. Therefore, the thickness of the front and rear plates 11 and 12 and the side plate 13 can be prevented from being excessively thick, thereby improving economics through material savings.

In order not to obstruct the installation of the partition 14, the water tube 16, the vertical support plate 17, and the like, the horizontal frame 32 and the vertical frame 33 are the front plate 11 and the rear plate 12. It is preferable that the support frame 31 is disposed at the edges of the horizontal frame 32 and the vertical frame 33 installed on the front plate 11 and the rear plate 12, respectively. Do. Of course, the support frame 31 may be installed in plurality in contact with the side plate 13, not necessarily at the edges. In addition, the support frame 31, the horizontal frame 32 and the vertical frame 33 are not necessarily all provided, and the water soundproof door (by the front panel 11, the rear panel 12 and the side plate 13) If 1) is judged to have sufficient rigidity, an unnecessary frame can be omitted. The reinforcement frame 30 may be configured of each pipe, but is not limited thereto. Through the installation of the reinforcing frame 30 it is possible to further increase the rigidity of the water soundproof door (1) itself.

On the other hand, in installing such a water soundproof door (1), if the entrance surface of the tunnel shaft 100 is uneven, a gap is formed between the water soundproof door (1) and the entrance surface of the tunnel shaft 100 to reduce the soundproofing effect. Can be. Therefore, in order to prevent such a situation, if necessary, the rear surface 12 of the water soundproof door 1 is installed at the edge of the tunnel shaft 100 at the entrance surface of the tunnel shaft 100 when the water soundproof door 1 is closed. Inlet mounting frame 40 in close contact with the back of the) may be further provided. That is, as shown in FIG. 1, the inlet mounting frame 40 is installed at the edge of the tunnel shaft 100 at the inlet surface of the tunnel shaft 100, and the rear surface of the rear plate 12 is the inlet mounting frame 40. It is to close the tunnel shaft 100 by installing a water soundproof door (1) in close contact with the. At this time, the hinge member 41 is installed on one side of the water soundproof door 1 so that the water soundproof door 1 can be opened and closed conveniently, and the hinge member 41 is coupled with the inlet mounting frame 40 to provide water. Soundproof door (1) can be configured to open and close in the form of a case.

Although the water soundproof door 1 is configured to have a rectangular shape when viewed from the front in the embodiment shown in the drawing, the water soundproof door 1 is not limited thereto, and is round, oval, etc. in accordance with the tunnel shaft 100 shape. It can be variously modified.

The water soundproof door 1 according to the present invention is installed at the inlet of the tunnel shaft 100, and then water is injected through the water inlet 18 to fill the water filling unit 10. As described above, the water soundproof door 1 according to the present invention is filled with water in the water filling portion 10 during use, and becomes a considerable weight, but when the water filling portion 10 is empty when installed and transported to the tunnel construction site, Because the state is inconvenient to transport and installation is minimized.

Thus, even if the blasting work in the tunnel shaft 100 after closing the entrance of the tunnel shaft 100 by the water soundproof door (1), the soundproofing performance of the water soundproof door (1) is exhibited to significantly reduce the noise due to the blasting work do. That is, also in the soundproofing performance, as confirmed by the real test described below, when the water filling section 10 is filled with water, the overall blasting noise can be greatly reduced, as well as excellent blocking ability against noise in the low frequency region. Will be exerted.

Next will be described in detail the actual experiment performed to test the performance of the tunnel soundproof door according to the present invention and the tunnel blast sound reduction method according to the present invention as described above.

For the performance test of the tunnel soundproof door according to the present invention, the inventor of the present invention actually manufactured a tunnel soundproof door and carried out a blast test. In order to simulate the tunnel, a cylindrical fume tube was installed and used as a tunnel. Figure 6 is a photograph showing the actual production of the tunnel soundproof door according to the invention used in the performance test, Figure 7 is a photograph showing a cylindrical fume pipe used as a substitute for the tunnel. 8 is a photograph showing a state in which a tunnel soundproof door is installed and covered in a cylindrical fume pipe. 9 is a photograph showing a state in which the tunnel sound insulation door is closed in a state in which the covering is completed.

Tunnel soundproof door according to the present invention used in the real experiment, the front plate, the back plate and the side plate was made using a steel sheet of 650 mm thickness, the front shape has a rectangular shape of 1756 mm horizontally, 1756 mm vertically The thickness of the water filling part 10 formed therein was 100 mm, and the thickness of the noise material filling part 20 was 500 mm. Using each pipe, the reinforcing frame 30 as shown in FIG. 5 was installed in the tunnel soundproof door, and the water filling part 10 was filled with water while the tunnel soundproof door was installed in front of the hole of the fume pipe, and the noise material was filled. The part 20 was filled with a noise material made of polyurethane. The total weight of the water-filled state of the tunnel soundproof door according to the present invention used in the real experiment was 570 kg.

On the other hand, as a conventional soundproof door for comparison, having the same size and thickness as the tunnel soundproof door of the present invention, the water filling portion is not formed therein, after installing the non-woven fabric on the front and rear panels of the soundproof door, respectively, inside the soundproof door "Comparative soundproof doors" filled with noise materials made entirely of polyurethane were made, and comparative experiments were performed under the same conditions. The total weight of the comparative soundproof door was 350 kg.

 The noise generated by explosives explosives in the fume pipe for the experiments of the tunnel soundproof door and the comparative soundproof door according to the present invention produced as described above using the known noise-only measuring instrument (SC-310) ) Frequency bands were measured and analyzed.

Table 1 below is measured at the measurement distance 50m and 100m for the state that the tunnel is completely open, the state where the comparative soundproof door is installed and closed in the tunnel and the state where the tunnel soundproof door according to the present invention used in the real experiment is installed and closed in the tunnel. Table 2 shows the results of the measurement of the maximum noise level (LAFmax), Table 2 shows the state in which the tunnel is completely open, the state in which the comparative soundproof door is installed in the tunnel, and the state in which the tunnel soundproof door according to the present invention used in the actual experiment is installed in the tunnel. Is the measurement result of the maximum sound pressure level in the main frequency band (125 Hz band) measured at the measurement distances of 50 m and 100 m.

As can be seen from the above test results, the tunnel soundproof door according to the present invention having a water filling part inside and filled with water filling part exhibits a significantly better soundproofing performance than the conventional soundproofing door.

In particular, since the tunnel soundproof door according to the present invention is a structure that can fill the water filling portion 10 in the field, when the movement or installation to perform the work in the state without filling the water and fill the water after installing the tunnel entrance Therefore, the installation work can be performed at a light weight, thereby improving the work efficiency.

Although the water soundproof door 10 according to the present invention has been described as being installed in the tunnel shaft, if necessary, it can be applied not only to tunnel construction but also to other places where noise protection is required.

1 is a schematic perspective view showing a state in which a tunnel soundproof door is installed in a tunnel shaft according to an embodiment of the present invention.

2 is a schematic perspective perspective view of a tunnel soundproof door according to the present invention.

3 and 4 are cross-sectional views taken along the line A-A of FIG. 2, respectively.

5 is an exploded perspective view showing the tunnel soundproof door in a disassembled state to show the configuration of the embodiment in which the reinforcing frame is installed inside the tunnel soundproof door according to the present invention.

Figure 6 is a photograph showing the actual product of the tunnel sound insulation door according to the invention used in the performance test.

7 is a photograph showing a cylindrical fume tube used as a substitute for the tunnel.

8 is a photograph showing a state in which a tunnel soundproof door is installed and covered in a cylindrical fume pipe.

9 is a photograph showing a state in which the tunnel sound insulation door is closed in a state in which the covering is completed.

<Description of the symbols for the main parts of the drawings>

1 Water Soundproof Door

10 Water Fill

Claims (7)

delete The front plate 11, the rear plate 12 and the side plate 13 is provided in the form of a panel having a thickness, inside the water filling portion 10 and the noise material is filled in the thickness direction, It is divided into the noise material filling portion 20 to be filled; Between the front plate 11 and the back plate 12, the partition wall 14 is installed in parallel with the front plate 11 and the back plate 12, the water filling portion 10 and the noise Soundproof door, characterized in that the material filling portion 20 is formed separately. 3. The method of claim 2, The water filling part 10 inside the soundproof door is installed with a water tube 16 made of a mat shape having a thickness to expand when water is injected to fill the space between the front plate 11 and the side plate 13. Soundproof door characterized in that. The method of claim 3, Soundproof door, characterized in that the vertical support plate (17) is connected to the back of the water tube (16) and vertically erected inside the soundproof door so that the water tube (16) can stand vertically inside the soundproof door. Article 2 The method of claim 4, wherein When the soundproof door is installed at the edge of the tunnel shaft 100 at the entrance surface of the tunnel shaft 100 so that the soundproof door is installed to close the tunnel shaft 100 at the entrance of the tunnel shaft 100, the back plate of the soundproof door ( Further provided with an inlet mounting frame 40 in close contact with the back of the 12), The hinge member is installed on one side of the soundproof door, and the hinge member is coupled to the inlet installation frame, so that the soundproof door is opened and closed in a swing form. Article 2 The method of claim 4, wherein In order to increase the strength of the soundproof door, the support frame member 31 is installed between the front plate 11 and the back plate 12 in the thickness direction inside the soundproof door, Horizontal frames 32 are installed in the upper and lower portions of the front plate 11 and the rear plate 12 in the horizontal direction inside the soundproof door, Soundproof door, characterized in that the vertical frame 33 is installed at the edge of each of the front plate (11) and the rear plate (12) in the vertical direction in the soundproof door. As a method of reducing the blast sound of the tunnel, At the entrance of the tunnel shaft 100, the front plate 11, the rear plate 12 and the side plate 13 is provided in the form of a panel having a thickness, the inside is filled with water filled in the thickness direction Part 10 and the noise material filling portion 20 is filled with a noise material, between the front plate 11 and the back plate 12, the front plate 11 and the back plate ( The partition wall 14 is installed in parallel with the cross section 12, and the water filling part 10 and the noise material filling part 20 are formed to be divided so that the blasting noise from the inside of the tunnel shaft 100 can be reduced. Install the water soundproof door (1) to reduce, At the edge of the tunnel shaft 100 in which the water soundproof door 1 is closed, an inlet mounting frame 40 is installed in close contact with the rear surface of the rear plate 12 of the water soundproof door 1 when the water soundproof door 1 is closed. By closing the entrance of the tunnel shaft 100 to the water soundproof door 1 at the time of the internal blasting of the tunnel shaft 100, the tunnel blast generated in the tunnel shaft 100 is reduced Tunnel blast sound reduction method.

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