Construction method of soundproof walls and soundproof walls

Abstract

To provide a construction method of a soundproof wall which exhibits excellent constructibility even in a narrow work space because members with a weight allowing manual construction are used in construction, and the members can be installed on columns without lifting them above the columns and have small dimensions, and to provide the soundproof wall.SOLUTION: In a construction method for installing, on columns 2, a soundproof wall 1 including a rear member 50 installed between the columns 2 and extending in a vertical direction and a front member 51 protruding from the rear member 50 toward a noise source side, a rear member installation process of attaching and installing the rear member 50 to the columns 2 and a front member installation process of attaching and installing the front member 51 to the rear member 50 are performed.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a construction method of a sound insulation wall and a sound insulation wall. Specifically, it relates to a construction method of a sound insulation wall having a branched top that reduces noise through multiple diffraction and interference by the shape of the top, and a branched sound insulation wall.

Background Art

[0002] Sound insulation walls are installed along roads such as highways and along tracks such as railways for the purpose of suppressing the propagation of noise from noise sources. In such sound insulation walls, it is required to be able to reduce noise without increasing the height. In recent years, a branched sound insulation wall having a branched top that improves the top of the sound insulation wall and reduces direct sound, diffracted sound, and reflected sound from the noise source has been proposed.

[0003] For example, Patent Document 1 discloses a top structure of a sound insulation wall including a sound insulation panel attached between columns and extending in the vertical direction, and a branched panel extending obliquely upward from the sound insulation panel toward the noise source side, and a detachable sound absorption member is attached to the lower surface side of the branched panel (see Claim 1 of the claims of Patent Document 1, paragraphs

[0030] to

[0054] of the specification, FIGS. 2, 5 to 7 of the drawings, etc.).

[0004] The top structure of the sound insulation wall described in Patent Document 1 can be expected to have a sound reduction effect by double diffraction and interference due to the sound insulation panel and the branched panel. Therefore, it has advantages such as excellent noise reduction effect without increasing the wall height, good maintainability, and no risk of crossing the adjacent land boundary.

[0005] However, in the case of elevated road and railway bridges, if there is no space to place heavy machinery such as cranes on or below the bridge, or if heavy machinery cannot be used, such as during railway operations, construction must be done manually. For example, in the case of panels with a 3m spacing between support columns, which are commonly used in railways, even excluding the removable sound-absorbing members, the weight exceeds what can be handled manually, making manual construction difficult and causing problems. Furthermore, considering application in snowy regions, it is necessary to be able to withstand snow loads, requiring reinforcement of both the sound insulation panel and the branching panel. Therefore, members are also needed to firmly connect the sound insulation panel and the branching panel, further increasing the weight.

[0006] Furthermore, due to noise regulations, sound barriers are often made 2 meters or taller, which means the height of the support columns also exceeds 2 meters. The top structure of the sound barrier described in Patent Document 1 is constructed by dropping it into the flange of the H-shaped steel support column, which requires lifting the top of the sound barrier above the support column. However, as mentioned above, there was also the problem that it was impossible to manually lift the top of a sound barrier, which is too heavy to construct by hand, above a support column that is more than 2 meters tall.

[0007] In addition, the top structure of the soundproof wall described in Patent Document 1 has an integrated sound insulation panel and branching panel, and is larger in thickness than a normal straight wall panel. For this reason, when installing it for railway use, it was difficult to transport the top section of the soundproof wall within the limited construction space between the track and the railing. In other words, when manually moving the integrated sound insulation panel and branching panel horizontally to the predetermined position and then moving it vertically to the top of the support column to lift it, the large dimensions of the panel made it difficult to work with, as it would come into contact with ancillary structures such as power lines and pipes on the track side of the railing, or hit temporary track protection fences. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2021-161610 [Overview of the project] [Problems that the invention aims to solve]

[0009] Therefore, the present invention was devised in view of the aforementioned problems, and its objective is to provide a soundproof wall construction method and soundproof wall that allows the components to be installed by hand, can be installed on the support column without lifting the components to the top of the column, and furthermore, has good workability even in a narrow workspace due to the small size of the components. [Means for solving the problem]

[0011] The 1 The construction method for the soundproof wall according to the invention comprises a rear member installed between support columns and extending in the vertical direction, and a direction from the rear member side toward the noise source side. Diagonally upwards A construction method for installing a soundproof wall, which includes a protruding front member, on a support column, comprising: a rear member installation step of attaching the rear member to the support column; an intermediate member installation step of attaching an intermediate member connecting the rear member and the front member to the rear member; and a front member installation step of attaching the front member to the intermediate member. Furthermore, in the rear member installation step, the rear member is mechanically fixed from the front side of the front flange of the support column to the front side of the front flange. It is characterized by the following:

[0013] The 2 The construction method for a soundproof wall according to the invention is characterized in that, in the first invention, before performing the rear member installation step, a receiving member installation step is performed in which a receiving member that receives and supports the rear member is fixed and installed on the support column.

[0014] The 3 The construction method for a soundproof wall according to the invention is characterized in that, in the first or second invention, a sound-absorbing material is attached to the front member.

[0015] The 4 The construction method for a soundproof wall according to the invention is the first 3 The invention is characterized in that the front member is provided with a projection that protrudes toward the noise source, and the sound-absorbing material is attached to the projection.

[0016] No. 5 The construction method of the sound insulation wall according to the invention is as follows. In the first invention, 4 In the invention, the protrusion is formed by combining L-shaped members with an L-shaped cross section.

[0017] No. 6 The construction method of the sound insulation wall according to the invention is characterized in that in the first invention, a sound absorption material is attached to the rear member.

[0018] No. 7 The sound insulation wall according to the invention is characterized in that it is installed on the column by the construction method of the sound insulation wall according to claim 1.

Effect of the Invention

[0019] According to the first to 7 According to the invention, by dividing the branched top structure of the sound insulation wall into the rear member and the front member, or the rear member, the front member, and the intermediate member, the weight of each member can be reduced, and manual construction becomes possible. In addition, the thickness of each member and the dimensions in the thickness direction of the sound insulation wall can also be reduced, making construction in a limited and narrow space easier. In particular, according to the first to seventh inventions, the rear member can be secured to the support column in the front, eliminating the need to lift the top structure of the soundproof wall above the H-shaped steel support column and drop it into the support column flange, as in the conventional technology. This improves work efficiency and safety when performing manual construction.

[0021] In particular, according to the 2 According to the invention, by previously installing a receiving member for receiving and supporting the rear member on the column, during the rear member installation process, the risk of the rear member falling outside the viaduct is reduced, and safety is improved. In addition, since the rear member can be installed at a part composed of the column and the receiving member, the rear member can be fixed to the column while being abutted against the receiving member, etc., improving the structural stability and sound insulation.

[0022] In particular, according to the 3 According to the invention, by attaching a sound absorption member to the front member on the noise source side, the noise can be effectively reduced.

[0023] In particular, according to the 4According to the invention, by providing a protruding portion having sound absorption properties on the front member, the points for diffraction and interference can be increased, and sound can be absorbed by the sound absorption material, thereby enhancing the noise reduction effect.

[0024] In particular, the 5 According to the invention, by dividing the protruding portion into two L-shaped members, the weight of the front member can be reduced, and the above-described operational effects can be achieved, which is advantageous in terms of manual construction.

[0025] In particular, the 6 According to the invention, it becomes possible to reduce the noise that wraps around over the top and propagates to neighboring areas with a sound absorption member installed on the rear member.

[0026] In particular, the 7 According to the invention, the above-described operational effects can be exhibited as a sound insulation wall, and a sound insulation wall that can be manually constructed even in a narrow space can be provided.

Brief Description of the Drawings

[0027] [Figure 1] FIG. 1 is a perspective view showing a sound insulation wall according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view showing the configuration of the sound insulation wall described above. [Figure 3] FIG. 3 is a front view showing the sound insulation wall described above as viewed from the noise source side. [Figure 4] FIG. 4 is a right side view of FIG. 3 showing the sound insulation wall described above. [Figure 5] FIG. 5 is a plan view of FIG. 3 showing the sound insulation wall described above. [Figure 6] FIG. 6 is a process explanatory view in perspective showing the column installation process of the construction method of the sound insulation wall according to an embodiment of the present invention. [Figure 7] FIG. 7 is a process explanatory view in perspective showing the sound insulation panel installation process and the receiving member installation process of the construction method of the sound insulation wall described above. [Figure 8]Figure 8 is a plan view diagram illustrating the installation process of the support members for the construction method of the soundproof wall described above, where (a) shows the case where a wedge nut is welded, and (b) shows the case where a locking clip K nut is attached. [Figure 9] Figure 9 is a plan view showing the support columns when the support member installation process for the soundproof wall construction method described above is omitted, with (a) showing the case where a wedge nut is welded and (b) showing the case where a locking clip K nut is attached. [Figure 10] Figure 10 is a perspective view diagram illustrating the process of installing sound-absorbing panels in the construction method of the soundproof wall described above. [Figure 11] Figure 11 is a perspective view diagram illustrating the upper sound-absorbing panel installation process in the construction method of the soundproof wall described above. [Figure 12] Figure 12 is a perspective view diagram illustrating the process of installing the rear member of the soundproof wall construction method described above. [Figure 13] Figure 13 is a perspective view diagram illustrating the intermediate member installation process for the construction method of the soundproof wall described above. [Figure 14] Figure 14 is a perspective view diagram illustrating the process of installing the front members of the construction method for the soundproof wall described above. [Modes for carrying out the invention]

[0028] The construction method and soundproof wall according to the present invention will be described in detail below with reference to the drawings.

[0029] [Soundproof wall] First, the soundproof wall 1 according to an embodiment of the present invention will be described using Figures 1 to 5. Figure 1 is a perspective view showing the soundproof wall 1 according to an embodiment of the present invention, and Figure 2 is an exploded perspective view showing the configuration of the soundproof wall 1. Figure 3 is a front view showing the soundproof wall 1 as seen from the noise source side. Figure 4 is a right side view of the soundproof wall 1 shown in Figure 3, and Figure 5 is a top view of the soundproof wall 1 shown in Figure 3.

[0030] The soundproof wall 1 according to an embodiment of the present invention is a soundproof wall installed in parallel along an area that is a source of noise, such as roads, railways, outdoor units, factories, and other facilities, and is a soundproof wall equipped with a branched top structure that reduces noise by interfering direct sound from the noise source with diffracted and reflected sound.

[0031] As shown in Figures 1 and 2, the soundproof wall 1 according to this embodiment consists of a plurality of H-shaped steel columns 2, 2 erected at predetermined intervals (for example, 2m, 3m, or 4m) on a structure such as a concrete structure, a plurality of sound insulation panels 3 inserted between these columns 2, 2, a plurality of sound absorption panels 4 inserted between the columns 2, 2 above the sound insulation panels 3, and a branched top structure 5, described later, provided on the upper part of the soundproof wall 1.

[0032] <Strut> The support column 2 is mainly made of H-shaped steel with a predetermined flange spacing (for example, about 100 mm to 175 mm) that has been treated with rust prevention treatment such as hot-dip galvanizing, and a base plate 20 is welded to the lower end, and it is erected on concrete structures such as the curb of a bridge or foundation concrete. In addition, multiple reinforcing ribs are formed at the joint between the H-shaped steel and the base plate 20 for reinforcement. Of course, the support column according to the present invention can have the sound insulation panel 3 and sound absorption panel 4 described later inserted between them, and can be replaced with support columns made of other steel materials or other materials such as square pipes, channel steel, or I-beams, as long as they can withstand the wind pressure etc. that is expected to be used as a sound barrier.

[0033] <Soundproofing panel> The sound insulation panel 3 is a concrete-based precast panel that has the function of reducing noise transmitted through the sound barrier wall 1 by suppressing vibrations according to the law of gravity.

[0034] <Sound-absorbing panel> The sound-absorbing panel 4 is a typical sound-absorbing panel that comprises a rectangular box-shaped metal casing made of metal plates, with sound-absorbing material inserted on the front side (noise source side) of the metal casing and an air layer formed on the back side (opposite side away from the noise source).

[0035] (Metal casing) This metal enclosure is made of metal plates such as highly weather-resistant plated steel plates or aluminum plates. Furthermore, as shown in Figures 1, 2, and 4, the front panel of the metal enclosure is a perforated metal type sound-absorbing panel made of aluminum plate with numerous through-holes. Direct noise is transmitted through the numerous through-holes and absorbed by the sound-absorbing material. Of course, the metal enclosure according to the present invention is not limited to the perforated metal type, but may also be a louver type with louver-shaped openings.

[0036] (Sound-absorbing material) Sound-absorbing materials consist of fibrous materials such as glass wool or polyester fibers, or porous materials such as foamed resin, and have the function of reducing noise by diffusely reflecting and attenuating it. Of course, the sound-absorbing material according to the present invention is not particularly limited as long as it is a material that can absorb noise by diffusely reflecting and attenuating it, and has predetermined water repellency and flame retardancy so that it can be inserted into a soundproof wall.

[0037] Of course, the sound-absorbing panel according to the present invention is not limited to porous sound-absorbing panels with sound-absorbing material inserted. For example, the sound-absorbing panel according to the present invention can be any other known sound-absorbing panel, such as a plate (membrane) vibration type sound-absorbing panel that absorbs sound by vibrating a plate or membrane and consuming a portion of the sound energy through internal friction, or a resonator type sound-absorbing panel equipped with a resonator with holes in a cavity, in which the air in the area of ​​the holes vibrates violently near the resonant frequency and absorbs sound by consuming it as frictional heat with the surroundings.

[0038] <Top structure> As shown in Figures 1 to 5, the top structure 5 of the soundproof wall 1 according to the present invention comprises, in a vertical cross-section, a rear member 50 extending in the vertical direction, a front member 51 projecting diagonally upward from the rear member 50 toward the noise source, and a plurality of right-angled triangular intermediate members 52 connecting the rear member 50 and the front member 51.

[0039] The rear member 50 is a rectangular panel material in front view, made of a metal plate such as a highly weather-resistant plated steel sheet or an aluminum sheet, and has the function of suppressing vibrations by gravity and reducing transmitted noise.

[0040] Furthermore, it is preferable that sound-absorbing panels (not shown) are attached to either the front or back of the rear member 50, or both, similar to the front member 51 described later. This is because the sound-absorbing panels installed on the rear member 50 can reduce noise that wraps around over the tops of the front member 51 and the rear member 50 and propagates to the surrounding area. To reduce the noise that wraps around, the sound-absorbing panels installed on the rear member 50 have through holes drilled on the back side of the sound barrier 1. However, through holes may also be drilled on the front side of the sound barrier 1. This is because it can reduce noise that wraps around over the tops of the front member 51 and propagates.

[0041] Furthermore, as shown in Figure 2, a receiving member 53, which has a U-shaped cross-section, is interposed between the rear member 50 and the support column 2 to receive and support the rear member 50, and is fixed to the front flange of the support column 2, which is the flange on the noise source side, with bolts as described later (see Figures 7 and 12). As shown in Figure 2, the length of the receiving member 53 is such that it reaches from the upper end of the sound insulation panel 3 to the upper end of the rear member 50, and the sound absorbing panel 4 is also fixed to the front flange of the support column 2 by interposing this receiving member 53 between it and the support column 2.

[0042] Furthermore, the front member 51, like the rear member 50, is a rectangular panel material, a rectangular panel material made of metal plate, and has the function of suppressing vibrations by gravity and reducing transmitted noise. As shown in Figure 4 and other figures, the front member 51 according to this embodiment is provided with a plurality of right-angled triangular intermediate members 52 interposed between it and the rear member 50, so as to intersect the rear member 50 at a predetermined angle and protrude diagonally upward toward the noise source.

[0043] Furthermore, a pair of L-shaped sound-absorbing panels 54, 54, which are upper and lower L-shaped members, are attached to the front member 51, and these sound-absorbing panels 54, 54 form a projection 55 that branches out from the lower surface of the front member 51 toward the noise source.

[0044] Except for having an L-shaped cross-section, this sound-absorbing panel 54 is similar to the sound-absorbing panel 4 described above, in that the aforementioned sound-absorbing material is inserted into a metal housing made of a metal plate such as a highly weather-resistant plated steel sheet or an aluminum sheet.

[0045] In this way, by dividing the projection 55 into a pair of L-shaped sound-absorbing panels 54, 54, the weight of the front member 51 and the individual sound-absorbing panels 54 can be reduced, making manual installation easier. Furthermore, by providing projections 55 that branch off from the front member 51, the number of points of diffraction and interference can be increased, and sound absorption can be improved by providing sound-absorbing material at the point where the noise first reaches.

[0046] [Construction methods for soundproof walls] Next, a method for constructing a protective wall according to an embodiment of the present invention will be described using Figures 6 to 14. The method will be explained using an example of constructing the soundproof wall 1 according to the aforementioned embodiment of the present invention.

[0047] (Strut installation process) Figure 6 is a diagram illustrating the column installation process in the construction method of the protective wall according to this embodiment. As shown in Figure 6, in the construction method of the protective wall according to this embodiment, first, a column installation process is performed in which the column 2 to which the aforementioned base plate 20 is welded is installed on a concrete structure such as a foundation by bolting it using anchors or the like.

[0048] Furthermore, in this process, numerous bolt holes are drilled into the front flange of the support column 2 for fixing the sound insulation panel 3, the sound absorption panel 4, and the rear member 50, or a support column 2 with numerous bolt holes already drilled in the front flange is installed. Of course, this process can be omitted if an existing support column is used.

[0049] (Soundproofing panel installation process) Figure 7 is a perspective view diagram illustrating the sound insulation panel installation process and the support member installation process of the soundproof wall construction method according to this embodiment. Next, as shown in Figure 7, the protective wall construction method according to this embodiment involves a sound insulation panel installation process in which the aforementioned sound insulation panel 3 is installed between the support columns 2, 2.

[0050] Specifically, sound insulation panels 3 are inserted between the two support columns 2 and bolted to the front flange of column 2. Of course, bolt fixing is not the only option; any means of mechanically fixing to column 2, such as riveting or inserting leaf springs, is acceptable.

[0051] Furthermore, as shown in Figure 7, in the illustrated configuration, two layers of sound insulation panels 3 are installed. However, the number of layers of sound insulation panels 3 can be appropriately determined according to the condition and purpose of the sound barrier wall 1, and it is also acceptable to install sound absorption panels 4 without installing any layers of sound insulation panels 3. In this process, it is not necessary to perform any special pre-stopping measures, as will be described later. This is because the height will be lower than the waist of the workers, and even if the sound insulation panels 3 fall outwards towards the boundary, they will not be very high, and there will be little risk of them falling.

[0052] (Installation process for receiving members) Next, as shown in Figures 7 and 8, the construction method of the protective wall according to this embodiment involves a receiving member installation step in which a receiving member 53 that receives and supports the rear member 50 is fixed to the support column 2. Figure 8 is a plan view diagram illustrating the receiving member installation step of the construction method of the soundproof wall according to this embodiment, where (a) is the case when a wedge nut is welded and (b) is the case when a locking clip K nut is attached.

[0053] As shown in Figure 8(a), the receiving member 53 is a U-shaped member made of thin steel plate with one side wider than the other. It is installed so that the wider side is on the side that abuts against the rear flange of the support column 2, which is on the rear (back) side (opposite side from the noise source) of the sound barrier 1. This prevents the panels, such as the sound-absorbing panels 4, from being accidentally inserted into the back of the rear flange of the support column 2 and falling from the bridge or boundary when inserting them between the front and rear flanges of the support column 2 in a later process.

[0054] Furthermore, as shown in Figure 8(a), a wedge nut WN is welded to this receiving member 53. The position where this wedge nut WN is welded corresponds to the position of the bolt hole of the support column 2 shown in Figure 7, etc., and each panel can be easily bolted to the front (front) side (noise source side) of the sound barrier wall 1. Here, "front fastening" refers to fastening each member (in this case, the receiving member 53) to the support column 2 by bolting from the front side of the front flange of the support column 2. Of course, as mentioned above, front fastening is not limited to bolt connections; it is acceptable as long as it can be mechanically fixed to the support column 2 by some means from the front side of the front flange of the support column 2.

[0055] Furthermore, instead of welding the wedge nut WN to the receiving member 53 in advance, a locking clip K nut KN can be clipped to the receiving member 53, as shown in Figure 8(b). This saves the effort of welding.

[0056] As shown in Figure 9(a), it is also possible to omit the installation process of the main support member by making the width of the rear flange of the support column 2 wider on both sides than the width of the front flange. In that case, the plate with the wedge nut WN welded to it is either welded on-site or welded to the support column 2 in advance.

[0057] Alternatively, as shown in Figure 9(b), instead of welding the wedge nut WN to the support column 2, a locking clip K nut KN may be clipped to the support column 2.

[0058] (Sound-absorbing panel installation process) Figure 10 is a perspective view diagram illustrating the sound-absorbing panel installation process in the construction method of the soundproof wall according to this embodiment, and Figure 11 is a perspective view diagram illustrating the upper sound-absorbing panel installation process in the construction method of the soundproof wall according to this embodiment. Next, as shown in Figure 10, in the construction method of the soundproof wall according to this embodiment, a sound-absorbing panel installation process is performed in which the sound-absorbing panel 4 is inserted between the flanges of the support column 2 and fixed to the front flange of the support column 2 with bolts.

[0059] In this sound-absorbing panel installation process, unlike the sound-insulating panel installation process, a receiving member 53 is pre-installed between the flanges of the support column 2 during the receiving member installation process, and wedge nuts WN or locking clips K nuts KN are installed at positions corresponding to the bolt holes of the support column 2. As a result, the sound-absorbing panel 4 can be easily bolted in front from the front side of the sound barrier wall 1, reducing the risk of accidentally dropping the sound-absorbing panel 4, which is higher than the worker's waist, outside the boundary or outside the elevated bridge. Furthermore, the front fixing of the sound-absorbing panel 4 allows the sound-absorbing panel 4 to be bolted to the front flange of the support column 2 on the noise source side, ensuring a gap-free installation. Compared to conventional methods where gaps may occur between the support column and the panel, and the sound-absorbing panel is dropped between the flanges of the support column and fixed with leaf springs, this method reliably prevents sound leakage through gaps, offering advantages from the standpoint of sound leakage.

[0060] Then, this sound-absorbing panel installation process is repeated multiple times to install multiple layers of sound-absorbing panels 4. As shown in Figure 11, in the illustrated configuration, four layers are installed.

[0061] (Rear component installation process) Figure 12 is a perspective view diagram illustrating the rear member installation process of the construction method for the soundproof wall according to this embodiment. Next, as shown in Figure 12, the construction method for the soundproof wall according to this embodiment involves a rear member installation process in which the rear member 50 of the top structure 5 is attached to the support column 2.

[0062] In this process as well, the receiving member 53 is pre-installed between the flanges of the support column 2 during the receiving member installation process, and wedge nuts WN and anti-loosening clips K nuts KN are installed at positions corresponding to the bolt holes of the support column 2. As a result, the rear member 50 can be easily bolted in from the front side of the sound barrier 1, reducing the risk of accidentally dropping the rear member 50, which is close to the workers' heads, outside the boundary or outside the elevated bridge. In addition, the height of the rear member 50 is kept low, reducing the weight of the panel installed close to the workers' heads, which not only makes the panel delivery work easier but also reduces the burden of heavy lifting work.

[0063] Furthermore, since the rear member 50 can be fixed to the support column from the front, it is not necessary to lift the heavy top structure (5), which is an integrated unit, onto the support column 2 made of H-shaped steel and drop it into the support column flange, as in conventional technology. This improves work efficiency and safety when installed manually. In addition, fixing the rear member 50 from the front allows the rear member 50 to be bolted to the front flange of the support column 2, which is the noise source side, and installed without any gaps. This reliably prevents sound leakage through gaps, which is also advantageous from the standpoint of sound leakage.

[0064] (Intermediate component installation process) Figure 13 is a perspective view diagram illustrating the intermediate member installation process of the soundproof wall construction method according to this embodiment. Next, as shown in Figure 13, in the soundproof wall construction method according to this embodiment, an intermediate member installation process is performed in which an intermediate member 52 connecting the rear member 50 and the front member 51 is attached to the rear member 50.

[0065] Specifically, multiple right-angled triangular intermediate members 52 are attached to the rear member 50 installed in the rear member installation step by bolting them together. As shown in Figure 13, in the construction method of the soundproof wall according to this embodiment, six intermediate members 52 are attached and installed.

[0066] This step can be omitted by integrating the intermediate member 52 with the rear member 50, or by integrating the intermediate member 52 with the front member 51. By integrating and omitting this step, construction time can be shortened. However, the increased weight makes it disadvantageous in terms of manual construction. Nevertheless, even in that case, it is possible to achieve a lighter weight than the conventional top structure in which the rear member 50, front member 51, and intermediate member 52 are all integrated.

[0067] (Front component installation process) Figure 14 is a perspective view diagram illustrating the front member installation process of the soundproof wall construction method according to this embodiment. Next, as shown in Figure 14, the soundproof wall construction method according to this embodiment involves a front member installation process in which the front member 51 is attached to the intermediate member 52.

[0068] In the construction method of the soundproof wall according to this embodiment, the front member 51 and the L-shaped sound-absorbing panel 54 are integrated and attached to the intermediate member 52 by bolting them together. Of course, sound-absorbing material may also be attached directly to the front member 51, which is made of a metal plate. However, it is preferable to attach the integrated front member 51 and sound-absorbing panel 54 to the intermediate member 52 because it shortens the on-site construction time.

[0069] Furthermore, since the projection 55 is formed from the two sound-absorbing panels 54, 54 which are divided into an L-shape in cross-section, the projection 55 that branches off again from the front member 51 can be installed quickly and easily, and the weight of the members can be reduced, making manual installation possible.

[0070] Furthermore, by providing sound-absorbing protrusions 55 on the front member 51, the number of points of diffraction and interference is increased, and by providing a sound-absorbing material on the front member 51 on the noise source side, noise can be effectively reduced.

[0071] Once this process is completed, the construction method for the soundproof wall according to this embodiment is finished, and the soundproof wall 1 according to the embodiment of the present invention is completed, as shown in Figure 1.

[0072] According to the construction method for the soundproof wall of this embodiment described above, the weight of each member can be reduced by dividing it into a rear member, a front member, and an intermediate member, making manual construction possible. In addition, the thickness of each member and the dimensions in the thickness direction of the soundproof wall can be reduced, making construction easier in limited, narrow spaces such as railway overpasses.

[0073] Furthermore, according to the construction method of the soundproof wall according to this embodiment, by installing the receiving member 53 on the support column in advance, the risk of dropping each component, such as the rear member 50, outside the elevated bridge when attaching panel materials near the top structure, such as during the rear member installation process, is reduced, thereby improving safety. In addition, since the rear member 50 can be installed in the area consisting of the support column 2 and the receiving member 53, the rear member 50 can be fixed to the support column 2 while in contact with the receiving member 53, thereby improving the structural stability and sound insulation performance.

[0074] Furthermore, according to the construction method of the soundproof wall according to this embodiment, by dividing the protrusion 55 into a sound-absorbing panel 54 consisting of two L-shaped members, the weight of the front member 51 can be reduced, thereby achieving the aforementioned effects, which is advantageous in terms of manual construction.

[0075] Furthermore, the soundproof wall 1 according to this embodiment can exhibit the aforementioned effects as a soundproof wall, and it is possible to provide a soundproof wall that can be constructed manually even in a small space.

[0076] Although the soundproof wall 1 and its construction method according to the embodiments of the present invention have been described in detail above, the embodiments described above or illustrated are merely examples of specific embodiments implemented in carrying out the present invention. Therefore, the technical scope of the present invention should not be interpreted as being limited by these embodiments.

[0077] In particular, while an example was given in which a sound-insulating panel 3 and a sound-absorbing panel 4 are installed below the top structure of the present invention as a soundproof wall, the soundproof wall according to the present invention may also consist of only one of these sound-insulating panels 3 and sound-absorbing panels 4. This is because it is sufficient for the soundproof wall as a whole to achieve the desired soundproofing effect.

[0078] 1: Soundproof wall 2: Prop 20: Base plate 3: Soundproofing panels 4: Sound-absorbing panels 5:Top structure 50: Rear part 51: Front component 52: Intermediate member 53: Receiving member 54: (L-shaped cross-section) sound-absorbing panel 55:Protrusion WN: Wedge Nut KN: K-nut locking clip

Claims

1. A construction method for installing a soundproof wall on a support column, the wall comprising a rear member installed between the support columns and extending vertically, and a front member projecting diagonally upward from the rear member towards the noise source, The process includes: a rear member installation step of attaching the rear member to the support column; an intermediate member installation step of attaching an intermediate member connecting the rear member and the front member to the rear member; and a front member installation step of attaching the front member to the intermediate member. In the rear member installation step, the rear member is mechanically fixed from the front side of the front flange of the support column to the front side of the front flange. A construction method for soundproof walls characterized by the following.

2. Before performing the rear member installation step, a receiving member installation step is performed in which a receiving member that receives and supports the rear member is fixed and installed to the support column. A method for constructing a soundproof wall according to claim 1, characterized by the above.

3. The aforementioned front panel is fitted with sound-absorbing material. A method for constructing a soundproof wall according to claim 1 or 2, characterized by the above.

4. The front member is provided with a projection that protrudes toward the noise source, and the sound-absorbing material is attached to the projection. A method for constructing a soundproof wall according to claim 3, characterized by the above.

5. The aforementioned protrusion is formed by combining L-shaped members with an L-shaped cross-section. A method for constructing a soundproof wall according to claim 4, characterized by the above.

6. The aforementioned rear member is fitted with sound-absorbing material. A method for constructing a soundproof wall according to claim 1, characterized by the above.

7. A soundproof wall characterized by being installed on the support column by the construction method of the soundproof wall described in claim 1.

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