Noise reduction assembly in tunnel and construction method thereof

Abstract

The invention discloses a noise reduction assembly in a tunnel and a construction method thereof. According to the noise reduction assembly, a fixing piece is fixed to a mounting rod, and the fixing piece is fixed to the inner wall of the railway tunnel; the clamping rod is fixed with the mounting rod, and two opposite long side walls of the clamping rod are respectively provided with a clamping groove; a plurality of sound absorption plates are arranged between every two adjacent clamping rods in the circumferential direction of the inner wall of the railway tunnel, the upper side edge and the lower side edge of each sound absorption plate are limited in every two adjacent clamping grooves in the circumferential direction of the inner wall of the railway tunnel, and the ends of the multiple sound absorption plates abut tightly in sequence in the length direction of the railway tunnel. The acoustic board is mounted in the railway tunnel, and sound waves in the railway tunnel can penetrate into the acoustic board and are spread and consumed in the fine holes; a micropore resonance sound absorption structure is jointly formed by the sound absorption plate and the cavity in the rear side of the sound absorption plate, and the sound absorption and noise reduction effect of the noise reduction assembly is further improved; the acoustic board is reliably fixed on the inner wall of the railway tunnel, so that the operation safety of a high-speed train in the railway tunnel is ensured.

Description

Technical Field

[0001] The present invention relates to the field of railway tunnels, and more particularly to a noise reduction component in a tunnel and a construction method thereof. Background Art

[0002] When a high-speed train passes through a railway tunnel, noise will be generated in the railway tunnel due to air flow disturbance. The sound waves will have an adverse effect on both the structural facilities inside the railway tunnel and the train itself, and will also significantly reduce the riding comfort of passengers.

[0003] At present, the noise reduction measures for railway tunnels are mainly to set up buffer openings at the entrances and exits of the tunnels or to set up buffer chambers at intervals in the tunnels. The above structures can absorb and buffer the sound waves in the tunnels to a certain extent; however, in some specific occasions, the above noise reduction buffer structures cannot be applied, and railway tunnels lack good noise reduction measures.

[0004] Therefore, how to provide a noise reduction component in a tunnel and a construction method thereof so as to overcome the above problems is an issue that needs to be urgently solved by those skilled in the art. Summary of the invention

[0005] In view of this, the present invention provides a noise reduction component in a tunnel.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A noise reduction component in a tunnel, comprising a mounting rod, a fixing piece, a clamping rod and a sound absorbing board, all of which are arranged in a railway tunnel; a plurality of the mounting rods are arranged in sequence along the extension direction of the railway tunnel, the rod length direction of the mounting rod is perpendicular to the extension direction of the railway tunnel, a plurality of the fixing pieces are fixed on each of the mounting rods, and the plurality of the fixing pieces are fixed to the inner wall of the railway tunnel; a plurality of the clamping rods are arranged in sequence along the circumferential direction of the inner wall of the railway tunnel, the length direction of the clamping rods is consistent with the extension direction of the railway tunnel, each of the clamping rods is fixed to a plurality of the mounting rods at the same time, a clamping groove is respectively provided on two opposite long side walls of the clamping rods, the groove length direction of the clamping groove is the same as the rod length direction of the clamping rods; a plurality of the sound absorbing boards are arranged between every two adjacent clamping rods, the upper side and the lower side of the sound absorbing board are respectively limited in two adjacent clamping grooves arranged along the circumferential direction of the inner wall of the railway tunnel, and the ends of the plurality of the sound absorbing boards are pressed against each other in sequence along the extension direction of the railway tunnel.

[0008] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a noise reduction component in a tunnel. The present application installs a sound-absorbing panel in a railway tunnel, and there is a gap between the sound-absorbing panel and the inner wall of the railway tunnel. When a high-speed train passes through the railway tunnel, the sound waves in the railway tunnel will penetrate into the interior of the sound-absorbing panel and propagate in the pores. Due to the viscosity and friction resistance generated by the movement of air, the sound energy is gradually consumed, thereby generating a resistive sound absorption effect. In addition, since the sound-absorbing panel and the inner wall of the railway tunnel form a cavity, the sound-absorbing panel and the cavity behind it jointly form a microporous resonant sound absorption structure, which further improves the sound absorption and noise reduction effect of the noise reduction component. The present application uses a mounting rod, a fixing member and a clamping rod to fix the sound-absorbing panel. Since the train runs at a high speed in the railway tunnel, the above structure can ensure that the sound-absorbing panel is reliably fixed to the inner wall of the railway tunnel, thereby ensuring the safe operation of the high-speed train in the railway tunnel.

[0009] Preferably, the clamping groove passes through the two end walls of the clamping rod, the board length direction of the sound absorbing board is consistent with the extension direction of the railway tunnel, and a plurality of the clamping rods are sequentially arranged along the extension direction of the railway tunnel, and the shortest distance between two adjacent clamping rods along the extension direction of the railway tunnel is greater than the board length of the sound absorbing board. This design facilitates the disassembly, assembly and replacement of the sound absorbing board at a later stage.

[0010] Preferably, the clamping rod comprises a first connecting rod and a second connecting rod, the length direction of the first connecting rod and the length direction of the second connecting rod are both consistent with the extension direction of the railway tunnel; a long side wall of the first connecting rod is fixed to the installation rod, and the second connecting rod is fixed to a long side wall of the first connecting rod away from the installation rod; two opposite long side walls of the second connecting rod are each integrally formed with two baffles, the length direction of the baffles is the same as the length direction of the second connecting rod, and the plate surface of the baffles is parallel to a long side wall of the first connecting rod away from the installation rod; the first connecting rod, the second connecting rod and one of the baffles together constitute a clamping groove. The clamping rod has a simple structure and can reliably clamp and limit the sound absorbing panel.

[0011] Preferably, it also includes vertical blocking strips and transverse blocking strips, wherein a plurality of vertical blocking strips are sequentially arranged along the extension direction of the railway tunnel, the length direction of the vertical blocking strips is perpendicular to the extension direction of the railway tunnel, a side wall of the vertical blocking strips is tightly fixed to the inner wall of the railway tunnel, a plurality of sound absorbing panels are arranged between each two adjacent vertical blocking strips along the extension direction of the railway tunnel, and a side wall of the vertical blocking strips can simultaneously press against the end walls of a plurality of sound absorbing panels; the length direction of the transverse blocking strip is the same as the extension direction of the railway tunnel, a long side of the transverse blocking strip is tightly fixed to the inner wall of the railway tunnel, and the other long side of the transverse blocking strip presses against the long side wall of the second connecting rod located at the top. No debris will enter between the sound absorbing panel and the inner wall of the railway tunnel, ensuring that a cavity can be formed between the two.

[0012] Preferably, the shortest distance between the second connecting rod located at the top and the ground in the railway tunnel is 2-3 meters. This design can limit the installation height of the sound-absorbing panel, and the sound-absorbing panel in this height range has the best sound absorption and noise reduction effect.

[0013] A construction method of a noise reduction component in a tunnel, using the above-mentioned noise reduction component in a tunnel, the method is as follows:

[0014] The first step is to mark the inner wall of the railway tunnel to mark the installation position of the fixing member, and then fix the fixing member on the inner wall of the railway tunnel;

[0015] The second step is to fix the installation rods on a plurality of the fixing members corresponding to their positions, and ensure that the upper ends of the plurality of the installation rods are aligned;

[0016] The third step is to sequentially install the clamping rods and the sound absorbing panels from bottom to top, ensuring that the sound absorbing panels are clamped and limited between two clamping rods adjacently arranged along the circumference of the railway tunnel.

[0017] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a construction method for a noise reduction component in a tunnel, which is simple, has high installation efficiency of the sound absorbing panel, and can also ensure the installation accuracy of the sound absorbing panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 It is an axonometric view of a noise reduction component in a tunnel;

[0020] Figure 2 It is a front view of a noise reduction component in a tunnel;

[0021] Figure 3 It is a partial axonometric view of a noise reduction component in a tunnel;

[0022] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0023] Figure 5 The invention is a flow chart of a construction method of a noise reduction component in a tunnel.

[0024] In the figure:

[0025] 1 is a mounting rod, 2 is a fixing piece, 3 is a clamping rod, 30 is a connecting rod 1, 31 is a connecting rod 2, 310 is a baffle, 4 is a sound absorbing board, 5 is a vertical blocking strip, 6 is a horizontal blocking strip, and 7 is a railway tunnel. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present invention discloses a noise reduction component in a tunnel and a construction method thereof. In the present application, a sound absorbing board 4 is installed in a railway tunnel 7, and a gap is provided between the sound absorbing board 4 and the inner wall of the railway tunnel 7. When a high-speed train passes through the railway tunnel 7, the sound waves in the railway tunnel 7 will penetrate into the interior of the sound absorbing board 4 and propagate in the pores. Due to the viscosity and friction resistance generated by the movement of air, the sound energy is gradually consumed, thereby generating a resistive sound absorption effect. In addition, since the sound absorbing board 4 and the inner wall of the railway tunnel 7 form a cavity, the sound absorbing board 4 and the cavity behind it jointly form a microporous resonant sound absorption structure, thereby further improving the sound absorption and noise reduction effect of the noise reduction component.

[0028] The present application uses a mounting rod 1, a fixing member 2 and a clamping rod 3 to fix the sound absorbing panel 4. Since the train in the railway tunnel 7 runs at a high speed, the above structure can ensure that the sound absorbing panel 4 is reliably fixed to the inner wall of the railway tunnel 7, thereby ensuring the safe operation of high-speed trains in the railway tunnel 7.

[0029] The clamping rod 3 includes a connecting rod 1 30 and a connecting rod 2 31. The connecting rod 1 30 and the connecting rod 2 31 have a simple structure and can form two clamping grooves to ensure the clamping limit of the sound absorbing board 4.

[0030] The clamping groove runs through the two end walls of the clamping rod 3, and the shortest distance between two adjacent clamping rods 3 along the extension direction of the railway tunnel 7 is greater than the board length of the sound absorbing board 4. This design facilitates the disassembly, assembly and replacement of a single sound absorbing board 4 at a later stage;

[0031] By designing the vertical blocking strips 5 and the horizontal blocking strips 6, a cavity can be reliably formed between the sound absorbing board 4 and the inner wall of the railway tunnel 7, and external impurities will not enter between the sound absorbing board 4 and the inner wall of the railway tunnel 7, thereby ensuring the sound absorption and noise reduction effect.

[0032] The installation method of the sound absorbing panel 4 is simple and reliable, has high construction efficiency and can also ensure installation accuracy.

[0033] Example

[0034] See attached Figure 1-5 The whole and part of the structure of an embodiment of the present invention is schematically shown. The present invention specifically discloses a noise reduction component in a tunnel. The noise reduction component is installed in a railway tunnel 7. The noise reduction component includes a mounting rod 1, a fixing member 2, a clamping rod 3 and a sound absorbing panel 4.

[0035] A plurality of installation rods 1 with rectangular cross sections are sequentially arranged along the extension direction of the railway tunnel 7. The railway tunnel 7 in this embodiment has a circular cross section, and the corresponding installation rod 1 is an arc-shaped rod. The arc center of the installation rod 1 coincides with the center of the cross section of the railway tunnel 7. The rod length direction of the installation rod 1 is perpendicular to the extension direction of the railway tunnel 7. A plurality of fixing members 2 are fixed on each installation rod 1 by welding or bolt connection. The plurality of fixing members 2 are fixed to the inner wall of the railway tunnel 7 by expansion bolts. A gap exists between the installed installation rod 1 and the inner wall of the railway tunnel 7.

[0036] A plurality of clamping rods 3 are arranged equidistantly in sequence along the circumferential direction of the inner wall of the railway tunnel 7. The length direction of the clamping rods 3 is consistent with the extension direction of the railway tunnel 7. Each clamping rod 3 is fixed to a plurality of mounting rods 1 at the same time. A rectangular clamping groove is respectively provided on two opposite long side walls of the clamping rod 3. The groove length direction of the clamping groove is consistent with the rod length direction of the clamping rod 3.

[0037] Multiple sound-absorbing panels 4 are arranged between every two adjacent clamping rods 3, and the upper side and the lower side of the sound-absorbing panels 4 are respectively limited in two adjacent clamping grooves arranged along the circumferential direction of the inner wall of the railway tunnel 7, and the ends of the multiple sound-absorbing panels 4 are pressed against each other in sequence along the extension direction of the railway tunnel 7; the surfaces of the multiple sound-absorbing panels 4 that have been laid are aligned, and the sound-absorbing panels 4 are arc-shaped panels. The surfaces of the multiple sound-absorbing panels 4 that have been installed together form an arc-shaped surface, and the arc-shaped surface is parallel to the inner wall of the railway tunnel 7;

[0038] Sound absorbing panels 4 are installed on both sides of the track in the railway tunnel 7, and the number of sound absorbing panels 4 on both sides of the track in the railway tunnel 7 is the same and their positions are opposite.

[0039] The clamping groove runs through the two end walls of the clamping rod 3, the length direction of the sound absorbing panel 4 is consistent with the extension direction of the railway tunnel 7, and a plurality of clamping rods 3 are arranged in sequence along the extension direction of the railway tunnel 7. The shortest distance between two adjacent clamping rods 3 along the extension direction of the railway tunnel 7 is greater than the length of the sound absorbing panel 4. This design facilitates the later disassembly, assembly and replacement of the sound absorbing panel 4, and workers can translate the sound absorbing panel 4 out of the clamping groove along the extension direction of the railway tunnel 7.

[0040] In the present application, the clamping rod 3 includes a connecting rod 1 30 and a connecting rod 2 31 of the same length and aligned ends. The length direction of the connecting rod 1 30 and the length direction of the connecting rod 2 31 are both consistent with the extension direction of the railway tunnel 7; the cross-sectional outer contour of the connecting rod 1 30 is rectangular, a long side wall of the connecting rod 1 30 is fixed to the mounting rod 1 by welding or bolting, and a long side wall of the connecting rod 1 30 away from the mounting rod 1 is centrally fixed with the connecting rod 2 31 by welding or bolting; the two opposite long side walls of the connecting rod 2 31 are each integrally formed with two rectangular baffles 310, the length direction of the baffles 310 is the same as the length direction of the connecting rod 2 31, and the plate surface of the baffle 310 is parallel to the long side wall of the connecting rod 1 30 away from the mounting rod 1; the connecting rod 1 30, the connecting rod 2 31 and a baffle 310 together constitute a clamping groove, the connecting rod 1 30, the connecting rod 2 31 and another baffle 310 together constitute another clamping groove, and the connecting rod 2 31 is located between the two clamping grooves.

[0041] To be more specific, in order to ensure the sound absorption performance of the noise reduction component, the present application also includes a vertical blocking strip 5 and a horizontal blocking strip 6; the vertical blocking strip 5 is an arc-shaped strip, and a plurality of vertical blocking strips 5 are arranged in sequence along the extension direction of the railway tunnel 7, the length direction of the vertical blocking strip 5 is perpendicular to the extension direction of the railway tunnel 7, and a side wall of the vertical blocking strip 5 is tightly fixed to the inner wall of the railway tunnel 7, and a plurality of sound-absorbing panels 4 are arranged between each two adjacent vertical blocking strips 5 along the extension direction of the railway tunnel 7. One side wall can be pressed against the end walls of multiple sound-absorbing panels 4 at the same time; the length direction of the transverse blocking strip 6 is the same as the extension direction of the railway tunnel 7, one long side of the transverse blocking strip 6 is tightly fixed to the inner wall of the railway tunnel 7, and the other long side of the transverse blocking strip 6 is pressed against the long side wall of the uppermost connecting rod 2 31; the vertical blocking strip 5 and the transverse blocking strip 6 can block the gap between the sound-absorbing panel 4 and the inner wall of the railway tunnel 7 to prevent debris from entering the above gap, thereby ensuring the sound absorption and noise reduction effect of the noise reduction component.

[0042] More specifically, the shortest distance between the second connecting rod 31 located at the top and the ground in the railway tunnel 7 is 2-3 meters, that is, the arrangement height of the sound absorbing panel 4 is limited. The sound absorbing panel 4 in this height range has the best sound absorption and noise reduction effect.

[0043] A construction method for a noise reduction component in a tunnel, the method being as follows:

[0044] The first step is to mark the inner wall of the railway tunnel 7 to mark the installation position of the fixing member 2, and then fix the fixing member 2 to the inner wall of the railway tunnel 7 by means of expansion bolts;

[0045] The second step is to fix the mounting rod 1 to a plurality of fixing members 2 corresponding to the position thereof, and ensure that the upper ends of the plurality of mounting rods 1 are aligned;

[0046] The third step is to install the clamping rod 3 and the sound absorbing panel 4 in sequence from bottom to top, that is, install a clamping rod 3, then arrange the sound absorbing panel 4 above the clamping rod 3, and ensure that the lower side of the sound absorbing panel 4 is inserted in the clamping groove of the clamping rod 3. After the sound absorbing panel 4 is in place, continue to install the next clamping rod 3 above the above-mentioned sound absorbing panel 4, and ensure that the upper side of the sound absorbing panel 4 is inserted in the clamping groove on the next clamping rod 3; ensure that there is a sound absorbing panel 4 clamped and limited between two clamping rods 3 arranged adjacent to each other along the circumference of the railway tunnel 7; after the clamping rods 3 and the sound absorbing panel 4 are all installed, first fix the horizontal blocking strip 6, and then fix the vertical blocking strip 5.

[0047] The sound absorbing board 4 in the present application is a particle sound absorbing board, which includes both the sound absorption principle of porous materials and the resonance sound absorption principle. On the one hand, there are many interconnected tiny pores of various shapes inside the sound absorbing board 4. When sound is incident on the surface of the sound absorbing board 4, the sound waves will penetrate into the inside of the sound absorbing board 4 and propagate in the pores. Due to the viscosity and friction resistance generated by the movement of air, the sound energy is gradually converted into heat energy and consumed, thereby generating a resistive sound absorption effect; on the other hand, since a cavity is provided at the rear side of the sound absorbing board 4, that is, a cavity formed between the sound absorbing board 4 and the inner wall of the railway tunnel 7, the sound absorbing board 4 and the cavity at the rear side thereof together form a microporous resonance sound absorption structure.

[0048] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0049] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A noise reduction component in a tunnel, characterized in that: The invention comprises a mounting rod (1), a fixing member (2), a clamping rod (3) and a sound absorbing plate (4) all arranged in a railway tunnel (7); a plurality of the mounting rods (1) are arranged in sequence along the extension direction of the railway tunnel (7); the rod length direction of the mounting rod (1) is perpendicular to the extension direction of the railway tunnel (7); a plurality of the fixing members (2) are fixed on each of the mounting rods (1); the plurality of the fixing members (2) are fixed to the inner wall of the railway tunnel (7); a plurality of the clamping rods (3) are arranged in sequence along the circumferential direction of the inner wall of the railway tunnel (7); the length direction of the clamping rods (3) is perpendicular to the extension direction of the railway tunnel (7); The extension direction of the railway tunnel (7) is consistent, each of the clamping rods (3) is fixed to a plurality of the mounting rods (1) at the same time, and a clamping groove is respectively provided on two opposite long side walls of the clamping rod (3), and the groove length direction of the clamping groove is the same as the rod length direction of the clamping rod (3); a plurality of sound absorbing panels (4) are arranged between each two adjacent clamping rods (3), and the upper side and the lower side of the sound absorbing panel (4) are respectively limited in two adjacent clamping grooves arranged along the circumferential direction of the inner wall of the railway tunnel (7), and the ends of the plurality of sound absorbing panels (4) are successively pressed against each other along the extension direction of the railway tunnel (7).

2. A noise reduction component in a tunnel according to claim 1, characterized in that: The clamping groove passes through the two end walls of the clamping rod (3); the board length direction of the sound absorbing board (4) is consistent with the extension direction of the railway tunnel (7); a plurality of the clamping rods (3) are arranged in sequence along the extension direction of the railway tunnel (7); and the shortest distance between two adjacent clamping rods (3) along the extension direction of the railway tunnel (7) is greater than the board length of the sound absorbing board (4).

3. A noise reduction component in a tunnel according to claim 1, characterized in that: The clamping rod (3) comprises a connecting rod 1 (30) and a connecting rod 2 (31), the length direction of the connecting rod 1 (30) and the length direction of the connecting rod 2 (31) are both consistent with the extension direction of the railway tunnel (7); a long side wall of the connecting rod 1 (30) is fixed to the installation rod (1), and the connecting rod 2 (31) is fixed to a long side wall of the connecting rod 1 (30) away from the installation rod (1); two opposite long side walls of the connecting rod 2 (31) are each integrally formed with two baffles (310), the length direction of the baffles (310) is the same as the length direction of the connecting rod 2 (31), and the plate surface of the baffles (310) is parallel to a long side wall of the connecting rod 1 (30) away from the installation rod (1); the connecting rod 1 (30), the connecting rod 2 (31) and one of the baffles (310) together constitute a clamping groove.

4. A noise reduction component in a tunnel according to claim 3, characterized in that: It also comprises a vertical blocking strip (5) and a transverse blocking strip (6), wherein a plurality of the vertical blocking strips (5) are sequentially arranged along the extension direction of the railway tunnel (7), the length direction of the vertical blocking strip (5) being perpendicular to the extension direction of the railway tunnel (7), a side wall of the vertical blocking strip (5) being tightly fixed to the inner wall of the railway tunnel (7), a plurality of the sound absorbing panels (4) being arranged between each two adjacent vertical blocking strips (5) along the extension direction of the railway tunnel (7), a side wall of the vertical blocking strip (5) being able to simultaneously press against the end walls of the plurality of the sound absorbing panels (4); the length direction of the transverse blocking strip (6) being the same as the extension direction of the railway tunnel (7), a long side edge of the transverse blocking strip (6) being tightly fixed to the inner wall of the railway tunnel (7), and another long side edge of the transverse blocking strip (6) being pressed against the long side wall of the second connecting rod (31) located at the top.

5. The noise reduction component in a tunnel according to claim 3, characterized in that: The shortest distance between the second connecting rod (31) located at the top and the ground inside the railway tunnel (7) is 2-3 meters.

6. A method for constructing a noise reduction component in a tunnel, characterized in that: Using the noise reduction component in a tunnel as described in any one of claims 1 to 5 above, the method is as follows: The first step is to mark the inner wall of the railway tunnel (7) to mark the installation position of the fixing member (2), and then fix the fixing member (2) on the inner wall of the railway tunnel (7); The second step is to fix the installation rod (1) on a plurality of the fixing members (2) corresponding to the position thereof, and ensure that the upper ends of the plurality of the installation rods (1) are aligned; The third step is to sequentially install the clamping rods (3) and the sound absorbing panels (4) from bottom to top, ensuring that the sound absorbing panels (4) are clamped and limited between two of the clamping rods (3) arranged adjacent to each other along the circumference of the railway tunnel (7).

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