Soundproofing structure and installation method of suspended soundproofing device

Abstract

This invention provides a soundproof structure and installation method that reduce the number of outdoor and high-altitude work steps, preventing the progress of installation work from being affected by weather conditions, and offering superior safety during installation. [Solution] A soundproofing structure to be installed in the opening of the deck slab of an elevated structure, comprising a suspended soundproofing device having a plurality of support columns and a plurality of sound-absorbing panels, wherein the support columns are fixed to female screw members embedded in the side surface of the deck slab opening, and the plurality of sound-absorbing panels constitute an internal space that penetrates in the vertical direction.

Description

Technical Field

[0001] The present invention relates to a soundproof structure installed on an elevated structure, and a soundproof structure provided with a suspended soundproof device for reducing noise radiated from an opening provided for purposes such as snow removal, and a method for installing the same.

Background Art

[0002] Conventionally, in snowy areas, for example, snow damage countermeasures have been taken on elevated bridges where railway vehicles run, and an open-deck elevated bridge having an opening for preventing snow accumulation on the floor slab is known. Also, various structures are known as suspended soundproof devices for reducing noise radiated downward from such an opening.

[0003] For example, Patent Document 1 describes the structure of a suspended noise reduction device provided with a noise passage portion of a predetermined length through which noise passes from a floor opening of a bridge toward a lower space.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Conventionally, a soundproof structure provided with such a suspended soundproof device has been installed by a process as shown in FIG. 17. Hereinafter, the installation process of the conventional soundproof structure will be described.

[0006] First, as part of step S101, a reinforced concrete floor slab 103 with a roughly rectangular opening 104 is manufactured, as shown in Figure 18. Multiple anchor bolts 105 for attaching a suspended soundproofing device are positioned in predetermined locations within the opening 104. The anchor bolts 105 are fixed and positioned to the reinforcing bars before the concrete is poured, and as shown in Figure 19, after the concrete is poured, the threaded portions of the anchor bolts 105 are positioned to protrude a predetermined length from the side of the opening 104. In this specification, the process in step S101 is defined as the opening manufacturing process.

[0007] Next, as part of step S102, the support column 110 is attached to the opening 104, as shown in Figure 20. The support column 110 is made of H-shaped steel, and multiple through holes are formed in the flange portion of the H-shaped steel for inserting the threaded portion of the anchor bolt 105. The support column 110 is lifted by a crane or the like, and positioned by inserting the threaded portion of the anchor bolt 105 through the through holes. After that, it is fixed in place by tightening the threaded portion protruding from the through holes with a nut. In this specification, the process in step S102 is defined as the support column installation process.

[0008] Next, as part of step S103, as shown in Figure 21, a plurality of crossbeams 140 are attached to the support column 110 fixed to the opening 104. The crossbeams 140 are arranged to connect the upper and lower parts of adjacent support columns 110. Alternatively, they may be arranged to connect the lower parts of support columns 110 that are facing each other in the shorter direction of a roughly rectangular shape across the opening 104. The crossbeams 140 are fixed to the support columns 110 with fastening members such as bolts and nuts. In this specification, the process in step S103 is defined as the crossbeam attachment process.

[0009] Next, as part of step S104, multiple sound-absorbing panels 130 are attached to the crossbeam 140, as shown in Figure 22. The sound-absorbing panels 130 are equipped with sound-absorbing material inside to reduce noise passing through the opening 104. The upper and lower ends of the sound-absorbing panels 130 are fixed to the crossbeam 140 by fastening members such as bolts and nuts. In this specification, the process in step S104 is defined as the sound-absorbing panel attachment process.

[0010] Next, as part of step S105, a sealing plate 120 is attached to the support column 110, as shown in Figure 23. The sealing plate 120 seals the gap between the support column 110 and the sound-absorbing panel 130, preventing noise leakage from the gap. The sealing plate 120 is fixed to the support column 110 by fastening members such as bolts and nuts. In this specification, the process in step S105 is defined as the sealing plate attachment process.

[0011] In conventional soundproofing installation methods, steps S101 through S105 are all carried out outdoors at the installation site of the elevated structure. Therefore, there was a risk of delays in the installation work due to bad weather or other factors.

[0012] Furthermore, conventional soundproofing installation methods required the erection of scaffolding that reached from the ground to the opening of the elevated structure during steps S103 to S105, which involved time-consuming assembly and dismantling of the scaffolding. Additionally, many work processes involved working at heights using scaffolding, necessitating long-term consideration of worker safety.

[0013] Therefore, the present invention has been made in view of the above matters, and aims to provide a soundproof structure and a method for installing a soundproof structure that reduce the number of outdoor and high-altitude work processes, prevent the progress of installation work from being affected by weather conditions, and provide excellent safety during installation. [Means for solving the problem]

[0014] This invention was made to achieve the above-mentioned objectives and is characterized by the following:

[0015] The soundproofing structure according to the present invention is a soundproofing structure installed in the opening of the deck slab of an elevated structure, and comprises a suspended soundproofing device having a plurality of support columns and a plurality of sound-absorbing panels, wherein the support columns are fixed to female screw members embedded in the side surface of the deck slab opening, and the plurality of sound-absorbing panels constitute an internal space that penetrates in the vertical direction.

[0016] In the soundproofing structure according to the present invention, the sound-absorbing panel is preferably provided with a surface plate on the surface facing the internal space, and the surface plate is preferably a thin plate with a plurality of holes that holds the sound-absorbing material.

[0017] In the soundproofing structure according to the present invention, a U-shaped crossbeam is attached to the upper end of the sound-absorbing panel, the crossbeam connects the support column and the sound-absorbing panel, and it is preferable that a drainage hole is formed at the connection between the crossbeam and the support column.

[0018] In the soundproofing structure according to the present invention, it is preferable that the crossbeam is equipped with a sealing member that closes the gap between the crossbeam and the side surface of the floor slab opening.

[0019] The method for installing a suspended soundproofing device according to the present invention is a method for installing a suspended soundproofing device installed in an opening in the deck of an elevated structure, and is characterized by comprising: an opening manufacturing step of arranging a female screw member for attaching the suspended soundproofing device on the side surface of the opening in the deck; an assembly step of the suspended soundproofing device; and a soundproofing device installation step of attaching the completed suspended soundproofing device to the opening in the deck.

[0020] In the method for installing a suspended soundproofing device according to the present invention, it is preferable that the suspended soundproofing device be assembled in a workshop located at a different location from the installation site of the elevated structure.

[0021] In the method for installing a suspended soundproofing device according to the present invention, the suspended soundproofing device comprises a plurality of support columns and a plurality of sound-absorbing plates, wherein the support columns are temporarily fixed to a jig placed on the ground, and the method preferably includes a column arrangement step of determining the spacing between adjacent support columns.

[0022] The summary of the above invention does not list all the features necessary for the present invention, and sub - combinations of these feature groups can also become inventions.

Effect of the Invention

[0023] According to the sound - proof structure of the present invention and the installation method of the suspended sound - proof device, even in the case of bad weather etc. where installation work on the viaduct is impossible, the entire suspended sound - proof device can be assembled inside a building with a roof, so that the delay of the construction period can be reduced.

[0024] Also, according to the sound - proof structure of the present invention and the installation method of the suspended sound - proof device, the working process at heights using scaffolding can be reduced, so that installation work with excellent safety can be carried out.

Brief Description of the Drawings

[0025] [Figure 1] A cross - sectional view showing an example of the installation state of the suspended sound - proof device of the present embodiment. [Figure 2] A flowchart showing an example of the installation process of the suspended sound - proof device of the present embodiment. [Figure 3] A perspective view showing an example of the opening of the present embodiment. [Figure 4] Cross - sectional view X - X of FIG. 3. [Figure 5] The support column of the present embodiment, (a) is a perspective view showing the corner support column, and (b) is a perspective view showing the intermediate support column. [Figure 6] A plan view showing the support column of the present embodiment. [Figure 7] The support column with the closing plate attached in the present embodiment, (a) is a perspective view showing the corner support column, and (b) is a perspective view showing the intermediate support column. [Figure 8] A perspective view showing the state where the support column of the present embodiment is temporarily fixed to the cross - shaped jig. [Figure 9] A perspective view showing the sound - absorbing plate of the present embodiment. [Figure 10] Cross - sectional view Y - Y of FIG. 9. [Figure 11]A cross-sectional view showing a sealing member that closes the gap between the crossbeam and the opening in this embodiment. [Figure 12] A perspective view showing an example of the process of attaching the sound-absorbing panel of this embodiment to the support column. [Figure 13] A perspective view showing an example of the process of installing the completed hanging soundproofing device of this embodiment into an opening. [Figure 14] A perspective view showing an example of the process of attaching the support column of this embodiment to the opening. [Figure 15] A cross-sectional view showing the mounting state of the support column in this embodiment to the opening. [Figure 16] A cross-sectional view showing an example of a support column in this embodiment. [Figure 17] A flowchart illustrating an example of the installation process for a conventional suspended soundproofing device. [Figure 18] A perspective view showing an example of a conventional opening. [Figure 19] Figure 18 shows a cross-sectional view of the ZZ region. [Figure 20] A perspective view showing an example of the process of attaching a conventional support column to an opening. [Figure 21] A perspective view showing an example of the process of attaching a conventional crossbeam to a support column. [Figure 22] A perspective view showing an example of the process of attaching conventional sound-absorbing panels to support columns. [Figure 23] A perspective view showing an example of the process of attaching a conventional cover plate to a support column. [Modes for carrying out the invention]

[0026] Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. Note that the following embodiments are not intended to limit the invention as described in each claim, and not all combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0027] Figure 1 is a cross-sectional view showing an example of the installation state of the suspended soundproofing device according to this embodiment.

[0028] The elevated bridge 1 shown in Figure 1 is an elevated bridge equipped with a suspended soundproofing device 9 according to this embodiment, and is, for example, an elevated bridge on which railway tracks are laid. The elevated bridge 1 is made of reinforced concrete and has a deck slab 3a on top of a plurality of bridge piers 2. A track slab 3b, for example, made of a rectangular concrete slab, is placed on the upper surface of the deck slab 3a, and a pair of left and right rails 3c are laid on the upper surface of the track slab 3b so as to extend in the depth direction of the paper in Figure 1. Note that the elevated bridge 1 shown in Figure 1 is for a double track.

[0029] Openings 4 are formed on both the left and right sides of the deck slab 3a, and between the track slabs 3b of the double track, penetrating the deck slab 3a vertically. The openings 4 are through-holes that prevent snow accumulation on the deck slab 3a and allow surrounding snow to be discharged downwards. The openings 4 are roughly rectangular in shape, with the extension direction of the rail 3c as the longitudinal side, and multiple openings are formed at intervals along the extension direction of the rail 3c.

[0030] The suspended soundproofing device 9 is formed in a roughly rectangular cylindrical shape and is attached to the opening 4 so that its internal space penetrates vertically. The suspended soundproofing device 9 discharges snow accumulated on the floor slab 3a downwards and absorbs noise radiated downwards from the opening 4 in its internal space, thereby reducing sound energy.

[0031] Next, we will explain the installation process of the soundproofing structure according to this embodiment, and provide a detailed explanation of each component.

[0032] Figure 2 is a flowchart showing an example of the installation process for the suspended soundproofing device of this embodiment, Figure 3 is a perspective view showing an example of an opening of this embodiment, Figure 4 is a cross-sectional view of Figure 3, Figure 5 is a support column of this embodiment, where (a) is a perspective view showing a corner support column and (b) is a perspective view showing an intermediate support column, Figure 6 is a plan view showing a support column of this embodiment, Figure 7 is a support column with a cover plate attached of this embodiment, where (a) is a perspective view showing a corner support column and (b) is a perspective view showing an intermediate support column, Figure 8 is a perspective view showing the support column of this embodiment temporarily fixed to a grid-shaped jig, and Figure 9 is Figure 10 is a perspective view showing the sound-absorbing panel of this embodiment, Figure 11 is a cross-sectional view showing the YY section of Figure 9, Figure 12 is a perspective view showing an example of the process of attaching the sound-absorbing panel of this embodiment to the support column, Figure 13 is a perspective view showing an example of the process of attaching the completed hanging soundproofing device of this embodiment to the opening, Figure 14 is a perspective view showing an example of the process of attaching the support column of this embodiment to the opening, Figure 15 is a cross-sectional view showing the state of the support column being attached to the opening of this embodiment, and Figure 16 is a cross-sectional view showing an example of a support column of this embodiment.

[0033] First, as part of step S1, a reinforced concrete floor slab 3 with an opening 4 is manufactured. In this specification, the process in step S1 is defined as the opening manufacturing process.

[0034] As shown in Figure 3, the opening 4 is formed in a substantially rectangular shape such that the extension direction of the rail 3c is its longitudinal side. Multiple high nuts 6 (female threaded members in the claims) for attaching the suspended soundproofing device 9 are embedded in the longitudinal side of the opening 4. The high nuts 6 are positioned at locations corresponding to the support columns 10, which will be described later, and are spaced apart in the height direction, preferably with two nuts at each height in the rail extension direction.

[0035] As shown in Figure 4, the tall nut 6 is positioned such that one end face, which has a screw hole, is exposed to the side surface of the opening 4. Preferably, one end face of the tall nut 6 and the side surface of the opening 4 are on the same plane. The tall nut 6 may also be positioned by connecting an anchor bolt 5 to the other end, which has a screw hole, as shown in Figure 4, and fixing the anchor bolt 5 to the reinforcing bar before pouring the concrete.

[0036] Furthermore, in the opening fabrication process of step S1, as described above, the opening 4 may be fabricated not only by arranging the anchor bolts 5 and high nuts 6 in the newly installed floor slab 3, but also by installing anchor nuts (female threaded members in the claims) in the existing floor slab 3 having an existing opening 4. In this case, first, a hole is drilled at a predetermined position on the side of the existing opening 4 to install the anchor nut. The position to be drilled is marked precisely by scribing, etc., but at this time, the support column 10 having the bolt hole 12 described later may be placed against the side of the opening 4 to mark the position. In addition, conventionally known anchor nuts can be used, and for example, a metal anchor in which an expanding part opens in the hole drilled in the side of the opening 4 and mechanically fixes to the hole wall, or an adhesive anchor in which the adhesive filled in the drilled hole hardens and fixes through a chemical reaction.

[0037] Next, as part of step S2, the support columns 10 for the suspended soundproofing device 9 are manufactured. In this specification, the process in step S2 is defined as the support column manufacturing process.

[0038] As shown in Figure 5, the support columns 10 consist of corner support columns 10a, which are positioned at the corners of the roughly rectangular suspended soundproofing device 9, and intermediate support columns 10b, which are positioned in the middle of the side of the roughly rectangular suspended soundproofing device 9.

[0039] Both the corner support 10a and the intermediate support 10b are equipped with a support body 11 that forms an H-shaped cross section with a pair of flange portions 11a and 11b and a web portion 11c connecting the two flanges. In this embodiment, the support body 11 may be made of an H-shaped steel made of an iron-based material in which the flange portions 11a and 11b and the web portion 11c are integrally rolled together. By using an iron-based material for the support body 11, the crossbeam fixing plate 16, which will be described later, can be easily welded.

[0040] The flange portion 11a of the support column body 11 is located on the outer surface of a roughly rectangular parallelepiped when the suspended soundproofing device 9 is completed. Multiple bolt holes 12 are formed in the upper part of the flange portion 11a. The bolt holes 12 are through which the threaded shafts of bolts 8 for attaching the suspended soundproofing device 9 to the opening 4 are inserted. The bolt holes 12 are formed in positions corresponding to the tall nuts 6 located on the side of the opening 4. In this case, the bolt holes 12 are formed spaced apart in the height direction, with two formed horizontally at each height, but it is preferable that the two bolt holes 12 formed horizontally are positioned to the left and right of the flange portion 11a, with the web portion 11c in between.

[0041] The flange portion 11b of the support column body 11 is located on the inner surface of a roughly rectangular parallelepiped when the suspended soundproofing device 9 is completed. A tightening hole 13 is formed at the top of the flange portion 11b at a position corresponding to the bolt hole 12 for passing a tool used to tighten the bolt 8. The tool used to tighten the bolt 8 is preferably a wrench, for example, which has an extension bar between the socket that holds the bolt 8 and the handle operated by the worker to extend the socket.

[0042] The fastening hole 13 is a through hole with a diameter larger than the diameter of the bolt hole 12, and is formed to be larger than the outer diameter of the socket of the wrench used to fasten the bolt 8 or the outer diameter of the extension bar. In addition, multiple bolt holes 14 for attaching the cover plate 20, which will be described later, are formed in predetermined positions in the flange portion 11b.

[0043] Preferably, a lifting hole 15 is formed in the upper part of the web portion 11c of the support column body 11 for lifting the support column body 11 with a crane or the like. The lifting hole 15 can also be used when lifting the completed suspended soundproofing device 9.

[0044] The support column body 11 is equipped with crossbeam fixing plates 16 at both its upper and lower ends. The crossbeam fixing plates 16 are substantially rectangular plate-shaped members, attached between a pair of flange portions 11a and 11b, and extending in the direction in which the rail 3c extends. In the support column body 11 of the intermediate support column 10b, the crossbeam fixing plates 16 extending from the flange portion 11b in the cylindrical inward direction of the completed suspended soundproofing device 9 are attached to the lower part of the support column body 11. The crossbeam fixing plates 16 are set to a length that allows the crossbeam 40, which will be described later, to be placed on them, and are equipped with bolt holes for attaching the crossbeam 40. The crossbeam fixing plates 16 are preferably made of an iron-based material and fixed to the support column body 11 by welding.

[0045] Furthermore, as shown in Figure 6, the crossbeam fixing plate 16 preferably has drainage holes 17 that penetrate vertically at the corners formed by the flange portions 11a, 11b and the web portion 11c. The drainage holes 17 allow rainwater and snowmelt that accumulate on the U-shaped crossbeam 40 to be drained downwards.

[0046] Next, as part of step S3, the closing plates 20a and 20b are attached to the corner support 10a and the intermediate support 10b. In this specification, the process in step S3 is defined as the closing plate attachment process.

[0047] As shown in Figure 7, the sealing plates 20a and 20b are made of thin steel plates formed in a roughly rectangular shape. The sealing plates 20a and 20b seal the gap between the support column body 11 and the sound-absorbing plate 30 (described later), preventing noise from leaking through the cylindrical internal space of the suspended soundproofing device 9.

[0048] The cover plate 20a attached to the corner support column 10a consists of a flat portion 21 and a bent portion 22, and is formed in a roughly L-shape when viewed from the height direction. The cover plate 20b attached to the intermediate support column 10b consists only of a flat portion 21. The flat portion 21 of the cover plates 20a and 20b has multiple through-holes, which are fastening holes 23, at positions corresponding to the fastening holes 13 formed in the support column body 11, and multiple through-holes, which are mounting holes 24, at positions corresponding to the bolt holes 14. The cover plate 20 is fixed to the support column body 11 by bolts that pass through the bolt holes 14 and mounting holes 24 of the support column body 11, and corresponding fastening members such as nuts.

[0049] The sealing plates 20a and 20b preferably have a strip-shaped rubber sheet 25 extending in the height direction on the surface facing the sound-absorbing plate 30, which will be described later. The rubber sheet 25 is compressed by the sealing plates 20a and 20b and the sound-absorbing plate 30, which prevents noise from leaking through the cylindrical internal space of the suspended soundproofing device 9.

[0050] Next, as step S4, the support columns 10 (corner support column 10a and intermediate support column 10b) are positioned. In this specification, the process in step S4 is defined as the support column positioning process.

[0051] As shown in Figure 8, the corner support 10a is positioned upright at the corner of the suspended soundproofing device 9. The intermediate support 10b is positioned upright between the corner support 10a, which are spaced apart in the extension direction of the rail 3c, and is located near the center of the side of the suspended soundproofing device 9. The corner support 10a and the intermediate support 10b are positioned so that the closing plates 20a and 20b attached to the flange portion 11b face the cylindrical internal space of the suspended soundproofing device 9. At this time, as shown in Figure 8, the corner support 10a and the intermediate support 10b may be positioned using a grid-shaped jig 70. The corner support 10a and the intermediate support 10b and the jig 70 are temporarily fixed together so as to be removable by fasteners such as bolts and nuts.

[0052] Furthermore, this process can be carried out at a workshop located away from the installation site of the elevated bridge 1. Such a workshop is preferably the interior of a building with a roof, which is less susceptible to wind and rain, allowing work to be carried out even in inclement weather.

[0053] Next, as step S5, the sound-absorbing panels 30 for the suspended soundproofing device 9 are manufactured. In this specification, the process in step S5 is defined as the sound-absorbing panel manufacturing process.

[0054] As shown in Figure 9, the sound-absorbing panel 30 is a roughly rectangular plate-shaped member. The sound-absorbing panel 30 seals the space between adjacent support columns 10 and forms the outer wall that creates the cylindrical internal space of the suspended soundproofing device 9. The sound-absorbing panel 30 also absorbs noise passing through the cylindrical internal space, reducing the sound energy.

[0055] As shown in Figure 10, the sound-absorbing panel 30 comprises a surface plate 31 located on the cylindrical internal space side of the suspended soundproofing device 9, a back plate 32 located on the cylindrical outer surface, and a sound-absorbing material 33 placed between the surface plate 31 and the back plate 32. The sound-absorbing panel 30 is formed to a size that fills the space between adjacent support columns 10, but it may also be formed as a single sound-absorbing panel 30 of a predetermined size, or, as shown in Figure 9, multiple sound-absorbing panels 30 may be arranged horizontally and combined to form a predetermined size.

[0056] As shown in Figure 9, the surface plate 31 is made of a thin steel plate and has holes drilled all over its surface. The holes drilled all over the surface plate 31 are, for example, round holes arranged in a staggered pattern. The holes in the surface plate 31 allow noise radiated into the cylindrical internal space of the suspended soundproofing device 9 to be effectively transmitted to the sound-absorbing material 33. Furthermore, it is preferable that the surface plate 31 be plated with an alloy such as zinc, aluminum, or magnesium to prevent corrosion due to rust, etc.

[0057] The back panel 32 is made of a thin steel plate. The back panel 32 is located on the outside of the suspended soundproofing device 9 and is exposed to wind and rain. For this reason, the back panel 32 is preferably made of a material with excellent weather resistance, and as an example, a steel plate thicker than the front panel 31 can be used. In addition, the back panel 32 is preferably plated with an alloy such as zinc, aluminum, or magnesium to prevent corrosion due to rust, etc.

[0058] The sound-absorbing material 33 is a substantially rectangular plate-shaped member having a predetermined thickness, and is made of a material with excellent sound-absorbing properties. As an example, the sound-absorbing material 33 can be made of synthetic fiber materials such as polyester short fibers. The material of the sound-absorbing material 33 may also be inorganic fiber materials such as glass wool, glass fiber or rock wool, metallic fiber materials such as aluminum fiber, stainless steel fiber or iron alloy fiber, organic foam materials such as plastic foam, urethane, ethylene propylene rubber, chloroprene, polyurethane foam, expanded polystyrene or natural polymer porous material, or any combination thereof.

[0059] Furthermore, when arranging multiple sound-absorbing panels 30 horizontally to form a predetermined size, it is preferable to attach a cushioning material 34 made of an elastic material such as a rubber sheet to the sides of the sound-absorbing panels 30. Such a cushioning material 34 can seal the gaps between adjacent sound-absorbing panels 30, thereby preventing noise leakage.

[0060] Furthermore, as shown in Figure 9, a crossbeam 40 is attached to the upper part of the sound-absorbing panel 30. The sound-absorbing panel 30 is attached to the support column 10 via the crossbeam 40. The crossbeam 40 is a long member with a U-shaped cross-section having a pair of flange portions, and channel steel can be used as an example. The crossbeam 40 attached to the upper part of the sound-absorbing panel 30 is attached so that the U-shaped opening faces upward. It is also preferable that the crossbeam 40 attached to the upper part of the sound-absorbing panel 30 has a lifting hole for lifting the sound-absorbing panel 30 with a crane or the like. The crossbeam 40 attached to the lower part of the sound-absorbing panel 30 is attached so that the U-shaped opening faces downward. The crossbeam 40 and the sound-absorbing panel 30 may also be connected using a mounting plate 41, as shown in Figure 10. Note that the mounting direction of the crossbeam 40 is not limited to the direction described above; the U-shaped opening may face downward when the crossbeam 40 is attached to the upper part of the support column 10, and face upward when it is attached to the lower part.

[0061] Furthermore, it is preferable that a sealing member 42 be attached to the upper crossbeam 40, as shown in Figure 11. The sealing member 42 closes the gap S between the crossbeam 40 and the opening 4 when the suspended soundproofing device 9 is installed.

[0062] The sealing member 42 is a long member with a substantially L-shaped cross-section. The sealing member 42 is made of an elastic material such as rubber and has a predetermined elastic force. The sealing member 42 is installed such that one side of the substantially L-shape is fixed to the inside of the flange portion of the crossbeam 40, and the other side of the substantially L-shape extends outward from the crossbeam 40. The length of the other side of the sealing member 42 extending from the outer surface of the crossbeam 40 is set to be longer than the size of the gap S. With such a sealing member 42, when the suspended soundproofing device 9 is installed, the other side of the sealing member 42 comes into contact with the side surface of the opening 4, sealing the gap S and preventing noise leakage.

[0063] Next, in step S6, the sound-absorbing panel 30 manufactured in step S5 is attached to the support column 10 that was positioned in step S4. In this specification, the process in step S6 is defined as the sound-absorbing panel attachment process.

[0064] As shown in Figure 12, the sound-absorbing panels 30 are placed between adjacent support columns 10. Since the sound-absorbing panels 30 are, for example, 3 meters or more in height, they are lifted by a crane or similar device. In this case, it is preferable to lift the sound-absorbing panels 30 by inserting a wire through a suspension hole formed in the horizontal beam 40 located at the top.

[0065] The sound-absorbing panel 30 is fixed by attaching the crossbeam 40 to the crossbeam fixing plate 16 of the support column 10. The crossbeam 40 is attached to the crossbeam fixing plate 16 by fastening members such as bolts and nuts. Alternatively, the lower parts of opposing intermediate support columns 10b may be connected with the crossbeam 40. Connecting the intermediate section of the suspended soundproofing device 9 with the crossbeam 40 results in a structurally superior structure.

[0066] Through steps S2 to S6, the main body of the suspended soundproofing device 9 is completed. After the suspension soundproofing device 9 is completed, the grid-shaped jig 70 that temporarily fixed the support column 10 is removed.

[0067] Next, in step S7, the completed suspended soundproofing device 9 is attached to the opening 4 of the elevated bridge 1. In this specification, the process in step S7 is defined as the soundproofing device installation process.

[0068] The completed suspended soundproofing device 9 is placed in a predetermined position in the opening 4 of the elevated bridge 1, as shown in Figure 13. At this time, it is preferable to insert a wire through the suspension hole 15 formed in the upper part of the support column body 11 and lift it with a crane or the like. Note that the only time a crane is needed at the elevated bridge 1 installation site is in step S7, when the completed suspended soundproofing device 9 is lifted. In other words, the installation method of the soundproofing structure of this embodiment can reduce the crane operating time at the elevated bridge 1 installation site compared to the conventional method of lifting each component with a crane and assembling them individually.

[0069] After moving the suspended soundproofing device 9 to the designated position, as shown in Figure 14, the bolts 8 are inserted through the tightening holes 23 of the cover plates 20a and 20b, the tightening holes 13 and bolt holes 12 of the support column 10, and screwed into the tall nuts 6 installed in the opening 4. Since the tightening holes 13 and 23 are formed to be larger than the outer diameter of the socket and extension bar used to tighten the bolts 8, the socket and extension bar can be inserted through the tightening holes 13 and 23 from the cylindrical inside of the suspended soundproofing device 9, making it easy to perform the tightening work.

[0070] Furthermore, the mounting bolt 8 is preferably installed together with an anti-loosening member (not shown). Examples of anti-loosening members include Nord-Lock washers and spring washers.

[0071] After screwing the mounting bolt 8 into the tall nut 6, but before fully tightening the bolt 8 to a predetermined torque, insert the filler plate 50 between the flange portion 11a of the support column 10 and the side surface of the opening 4, as shown in Figures 14 and 15.

[0072] The filler plate 50 fills the gap between the support column 10 and the concrete surface of the opening 4, stabilizes the contact surface, and ensures secure attachment of the support column 10 to the opening 4. The filler plate 50 is a plate-shaped steel plate formed in a substantially rectangular shape and has grooves 51 at positions corresponding to the bolts 8. The grooves 51 are substantially U-shaped grooves extending for a predetermined length from the lower end of the filler plate 50. By passing the bolts 8 through the grooves 51, the filler plate 50 can be inserted from above into the gap between the support column 10 and the side surface of the opening 4.

[0073] After inserting the filler plate 50, the bolts 8 are tightened to the specified torque, completing the fixing of the suspended soundproofing device 9.

[0074] Furthermore, the tightening of the bolts 8 and the installation of the filler plates 50 can be performed from the deck slab 3a of the elevated bridge 1, eliminating the need to erect scaffolding from the ground below the opening 4, as is the case with conventional suspended soundproofing devices.

[0075] Furthermore, as shown in Figure 16, if there is a height restriction on the side of the opening 4 and the distance between the support column 10 and the side of the deck slab 3a becomes too great, a support column 60 may be placed between the support column 10 and the side of the deck slab 3a. The support column 60 allows the support column 10 to be fixed to the elevated bridge 1 at multiple positions with spacing in the height direction, resulting in a more secure mounting structure for the suspended soundproofing device 9. As an example, an H-shaped steel beam can be used for the support column 60. It is preferable to use an aerial work platform or the like when installing the support column 60.

[0076] Thus, according to the soundproofing structure and installation method of this embodiment, the assembly process of the suspended soundproofing device 9 can be carried out in a workspace inside a building with a roof, thus preventing delays in the construction period due to bad weather, etc. Furthermore, according to the soundproofing structure and installation method of this embodiment, the suspended soundproofing device 9 can be installed without using scaffolding as in conventional installation methods, thus enabling installation work with superior safety.

[0077] In this embodiment, the opening fabrication process in step S1 was described as being performed before the support column fabrication process in step S2. However, the opening fabrication process in step S1 may be performed in parallel with the processes from the support column fabrication process in step S2, which is the assembly process of the suspended soundproofing device 9, to the sound-absorbing panel installation process in step S6. This allows the assembly of the suspended soundproofing device 9 to be carried out while the opening 4 is being fabricated by pouring concrete, thereby further shortening the construction period. It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention. [Explanation of Symbols]

[0078] 1 viaduct 2 bridge piers 3a floor slab 3b orbital slab 3c rail 4 openings 5, 105 Anchor bolts 6. High nuts 8 volts 9, 109 Hanging soundproofing device 10, 110 posts 10a Corner support post 10b Intermediate support 11. Main support column 11a, 11b Flange section 11c Web Department 12, 14 bolt holes 13 Tightening holes 15 Hanging holes 16. Crossbeam fixing plate 17 Drain hole 20a, 20b, 120 Blocking plate 21 Plane part 22 Bending section 23 Fastening holes 24 mounting holes 25 Rubber Sheet 30, 130 sound-absorbing panels 31 Surface plate 32 Back plate 33 Sound-absorbing material 34 Cushioning material 40, 140 crossbeam 41 Mounting plate 42 sealing member 50, 150 filler plates 51 Groove 60 support pillars 70 jigs

Claims

1. A soundproofing structure installed in the opening of the deck slab of an elevated structure, It is equipped with a suspended soundproofing device having multiple support columns and multiple sound-absorbing panels, The support column is fixed to a female screw member embedded in the side surface of the floor slab opening. A soundproofing structure characterized in that multiple sound-absorbing panels constitute an internal space that penetrates in the vertical direction.

2. In the soundproofing structure described in claim 1, The sound-absorbing panel has a surface plate on the side facing the internal space, The aforementioned surface plate is a thin plate with multiple holes and is characterized by its ability to hold sound-absorbing material.

3. In the soundproofing structure described in claim 1, A U-shaped crossbeam is attached to the upper end of the sound-absorbing panel. The aforementioned crossbeam connects the support column and the sound-absorbing panel, A soundproofing structure characterized in that drainage holes are formed at the connection point between the crossbeam and the support column.

4. In the soundproofing structure described in claim 3, The soundproofing structure is characterized in that the crossbeam is provided with a sealing member that closes the gap between the crossbeam and the side surface of the floor slab opening.

5. A method for installing a suspended soundproofing device to be installed in the opening of the deck slab of an elevated structure, A process for manufacturing an opening, which involves arranging a female threaded member for attaching the suspended soundproofing device on the side surface of the floor slab opening, The process of assembling the aforementioned suspended soundproofing device, A method for installing a suspended soundproofing device, characterized by comprising a soundproofing device installation step of attaching the completed suspended soundproofing device to the floor slab opening.

6. In the method for installing a suspended soundproofing device as described in claim 5, A method for installing a suspended soundproofing device, characterized in that the suspended soundproofing device is assembled in a workshop located at a different location from the installation site of the elevated structure.

7. In the method for installing a suspended soundproofing device as described in claim 5, The aforementioned suspended soundproofing device comprises multiple support columns and multiple sound-absorbing panels. A method for installing a suspended soundproofing device, characterized in that the support columns are temporarily fixed to a jig placed on the ground, and the method includes a column arrangement step of determining the distance between adjacent support columns.

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