Soundproof wall unit, soundproof wall unit replacement method and soundproof wall construction method

Abstract

To provide a soundproof wall unit of which constituent members can be easily replaced according to the deterioration state and members can be prevented from falling.SOLUTION: A soundproof wall unit 1 in this embodiment includes a face plate 2 made of a steel plate, and a frame part 3 joined to the face plate 2. The face plate 2 has a main plate part 21, face plate ribs 22 folded back from the left and right ends of the main plate part 21, and folded-back pieces 23 folded back from the left and right face plate ribs 22 in directions approaching each other. The frame part 3 is disposed between the main plate part 21 and the folded-back pieces 23, and the folded-back pieces 23 are joined to the frame part 3 with bolts 51. The face plate 2 is configured to be insertable and removable in the vertical direction along the frame part 3 when being released from its connection to the frame part 3.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a soundproof wall unit that is installed alongside a structural frame, a method for replacing a soundproof wall unit, and a method for constructing a soundproof wall. [Background technology]

[0002] Conventional soundproof wall structures consist of soundproof panels attached to H-shaped steel supports, which increases the number of components required for the wall and increases the amount of work required for on-site installation, resulting in higher construction costs. Furthermore, repeated loads from train wind pressure and other factors can loosen the bolts that secure the components together, and there is a risk of components falling due to deterioration.

[0003] Therefore, the techniques disclosed in Patent Documents 1 to 4 have been proposed to simplify the construction work required for on-site installation and reduce the risk of components falling due to deterioration.

[0004] The soundproof wall steel member of Patent Document 1 comprises a wall body made of a soundproof panel or board, left and right vertical members, and a base member, and the wall body, left and right vertical members, and base member are integrated together.

[0005] The steel soundproof wall member of Patent Document 2 comprises a wall body having a soundproof panel or board, and a base member having a flange, and the wall body and the flange of the base member are mechanically fastened together.

[0006] The wall structure of Patent Document 3 comprises a wall main body portion having a main surface along a first plane direction, and a base portion joined to the lower part of the wall main body portion, the base portion having a plate-shaped base plate, a fastening member for fastening the base plate to a concrete foundation, and an adjustment member that is passed through the base plate and for adjusting the protruding length from the lower surface of the base plate, the lower end of the adjustment member being in contact with the upper surface of the concrete foundation.

[0007] The soundproof wall unit of Patent Document 4 comprises a pair of left and right steel support members and a panel made of steel plate that insulates noise, the pair of left and right support members each having outer flanges folded back in the direction in which they are arranged side by side, the panel having a pair of left and right folded parts where the left and right ends are folded back in the direction in which they are arranged side by side in a bag-like shape inside the structural body, the outer flanges and the folded parts are fastened to the inside of the structural body with joining members, and asymmetrical steps or irregularities are formed on the end faces of the pair of left and right folded parts, and the steps or irregularities on the end faces of adjacent pairs of left and right folded parts fit together so that the outer surfaces of the panel are flush. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-10452 [Patent Document 2] Japanese Patent Application Publication No. 2019-7193 [Patent Document 3] Japanese Patent Publication No. 2022-30287 [Patent Document 4] Japanese Patent Application Publication No. 2019-85754 Summary of the Invention [Problem to be solved by the invention]

[0009] Among the components that make up a soundproof wall unit, the face plate, which is susceptible to wind pressure from trains and other sources and flying objects, is the component most susceptible to deterioration and damage. On the other hand, the base member that supports the face plate is less susceptible to deterioration and damage than the face plate. Thus, the degree of deterioration and damage varies for each component that makes up a soundproof wall unit. In this regard, with the technologies disclosed in Patent Documents 1 to 4, when replacing a face plate or a wall body, the entire face plate or wall body must be replaced. This makes it difficult to replace the face plate. Furthermore, with the technologies disclosed in Patent Documents 1 to 4, the face plate is joined to the base member, and therefore the face plate is supported in a cantilevered state relative to the base member. Therefore, if a lateral load, such as a wind load, acts on the face plate and damages the joint between the face plate and the base member, there is a risk that components such as bolts may fall.

[0010] The present invention has been devised in light of the above-mentioned circumstances, and its object is to provide a soundproof wall unit, a method for replacing a soundproof wall unit, and a method for constructing a soundproof wall, which allow component parts to be easily replaced depending on the deterioration state and prevent the parts from falling. [Means for solving the problem]

[0011] The soundproof wall unit of the present invention is a soundproof wall unit that is installed alongside a structural body, and comprises a panel made of a steel plate, and a frame portion joined to the panel, wherein the panel has a main panel portion, panel ribs folded back from the left and right ends of the main panel portion, and folded-back pieces folded back from the left and right panel ribs in directions approaching each other, the frame portion is disposed between the main panel portion and the folded-back pieces, the folded-back pieces are joined to the frame portion by mechanical joining means, and the panel is configured so that it can be inserted and removed in the vertical direction along the frame portion when it is released from its connection to the frame portion.

[0012] The method for replacing a soundproof wall unit according to the present invention is characterized by comprising a removal step of releasing the connection between the face plate and the frame portion by the mechanical connecting means and removing the face plate upward along the frame portion, and a face plate joining step of inserting a new face plate different from the face plate from above the frame portion and joining the new face plate to the frame portion by the mechanical connecting means.

[0013] The method for replacing a soundproof wall unit according to the present invention is characterized by comprising: a removal step of releasing the connection between the base and the frame portion, which are connected to the structural body, by mechanical connecting means, and removing the frame portion to which the face plate is connected from the base; a frame connecting step of connecting the base and a new frame portion by mechanical connecting means; and a face plate connecting step of inserting a new face plate different from the face plate from above the new frame portion and connecting the new face plate to the new frame portion by mechanical connecting means.

[0014] The method for constructing a soundproof wall according to the present invention is a method for constructing a soundproof wall using the soundproof wall unit according to the present invention, and includes a face plate joining step of joining the face plate and the frame portion by mechanical joining means. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a soundproof wall unit, a method for replacing a soundproof wall unit, and a method for constructing a soundproof wall, which allow component parts to be easily replaced depending on the deterioration state and prevent parts from falling. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1(a) is a side view showing a soundproof wall using an example of a soundproof wall unit in an embodiment, and FIG. 1(b) is a side view showing the soundproof wall unit of FIG. 1(a) with an accessory attached. [Figure 2] FIG. 2 is a perspective view showing an example of a soundproof wall unit according to an embodiment. [Figure 3]FIG. 3(a) is a plan view showing an example of a soundproof wall unit in the embodiment, and FIG. 3(b) is a front view showing an example of a soundproof wall unit in the embodiment. [Figure 4] FIG. 4(a) is a plan view showing an example of a face plate of a soundproof wall unit in the embodiment, and FIG. 4(b) is a front view showing an example of a face plate of a soundproof wall unit in the embodiment. [Figure 5] FIG. 5(a) is a side view showing an example of a frame portion and a base portion of a soundproof wall unit in an embodiment, and FIG. 5(b) is a front view showing an example of a frame portion and a base portion of a soundproof wall unit in an embodiment. [Figure 6] FIG. 6(a) is a diagram illustrating the frame portion joining step, and FIG. 6(b) is a diagram illustrating the face plate joining step. DETAILED DESCRIPTION OF THE INVENTION

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out a soundproof wall unit, a soundproof wall unit replacement method, and a soundproof wall construction method according to the present invention will be described in detail with reference to the drawings.

[0018] As shown in Figure 1(a), the soundproof wall unit 1 is installed as a parapet along the edge of a bridge 8 such as a railway bridge or road bridge, on a structural body such as the ground protection part of the bridge 8. In addition, multiple soundproof wall units 1 are installed in parallel along the edge of the bridge 8 to form a soundproof wall that prevents noise generated from the railroad tracks and roads inside the bridge 8 from leaking into the private land.

[0019] As shown in FIG. 1(b), the soundproof wall unit 1 is provided with accessory members such as a lid receiving member 82, a sound-absorbing panel 83, and a holding member 84. A lid 81 is placed on the lid receiving member 82, which is provided on the upper side of a trough 80 formed in the ground protection section of the bridge 8. The lid 81 is placed on the upper edge of the trough 80 and the lid receiving member 82 fixed to the soundproof wall unit 1. The sound-absorbing panel 83 is a well-known sound-absorbing panel with predetermined sound-absorbing performance. The holding member 84 can hold components such as a leaky coaxial cable (LCX) cable.

[0020] 2, 3(a) and 3(b), the soundproof wall unit 1 comprises a face plate 2, a frame portion 3 joined to the face plate 2 by mechanical joining means, and a base portion 4 joined to the frame portion 3 by mechanical joining means. The face plate 2 is configured so that it can be inserted and removed in the vertical direction along the frame portion 3 when the connection between the face plate 2 and the frame portion 3 is released.

[0021] The face plate 2 is made of a steel plate and is bent into a predetermined shape. The face plate 2 has a main plate portion 21, a face plate rib 22, and a folded piece 23.

[0022] The main board portion 21 is arranged on the private land side (rear side), which is opposite the noise side.

[0023] The face plate ribs 22 are folded back from the left and right ends of the main plate portion 21 towards the noise side (front side). One of the pair of face plate ribs 22 is formed with a protrusion 24 that protrudes towards another soundproof wall unit 1 that is installed alongside. The other of the pair of face plate ribs 22 is formed with a groove 25 into which the protrusion 24 of the other soundproof wall unit 1 that is installed alongside is fitted. A filler material 26 such as rubber is provided in the groove 25. When the protrusion 24 is fitted into the groove 25, the filler material 26 is crushed, thereby reducing the gap between the protrusion 24 and the groove 25 and preventing noise leakage through this gap.

[0024] The folded pieces 23 are folded back from the left and right face plate ribs 22 in directions that bring them closer to each other. First through holes 27 are formed in the folded pieces 23. Bolts 51 are provided in the first through holes 27 as mechanical joining means. Mechanical joining means are capable of joining and releasing the joining, and the following description will be given using bolts as an example of mechanical joining means. In addition to bolts, rivets and the like may also be used as mechanical joining means.

[0025] As shown in Figures 2, 3(a) and 3(b), the frame section 3 is disposed between the main plate section 21 and the folded-back piece 23, which is on the inner side of the face plate 2. The frame section 3 has a pair of vertical members 31 extending in the vertical direction, and a horizontal member 32 connecting the pair of vertical members 31.

[0026] The vertical member 31 is joined to the folded piece 23 by bolts 51, which serve as mechanical joining means. The vertical member 31 is made, for example, of a channel steel, and has a pair of vertical member flanges 33, 34 extending along the folded piece 23, and a vertical member web 35 connecting the pair of vertical member flanges 33, 34 and extending along the face plate rib 22. One of the vertical member flanges 33 is joined to the folded piece 23 by bolts 51.

[0027] 5(a) and 5(b), a second through hole 36 is formed in one of the vertical member flanges 33. A first nut 51a facing the second through hole 36 is welded to the inner surface of one of the vertical member flanges 33.

[0028] As shown in Figures 3(b), 5(a), and 5(b), the second through hole 36 faces the first through hole 27 of the folded piece 23. A bolt 51 for joining the folded piece 23 is disposed in the second through hole 36. The bolt 51 is screwed into the first nut 51a. In other words, by fixing the first nut 51a to the inner surface of the vertical member flange 33, the bolt 51 becomes a so-called one-sided bolt, and can join the folded piece 23 and the vertical member flange 33 from the front side.

[0029] 1(a) and 1(b), the bolt 51 joins the accessory members such as the lid receiving member 82, the sound-absorbing panel 83, the retaining member 84, etc. to the folded piece 23 and the vertical member flange 33. In other words, by fixing the first nut 51a to the inner surface of the vertical member flange 33, the bolt 51 becomes a so-called one-sided bolt, and can join the accessory members such as the lid receiving member 82, the sound-absorbing panel 83, the retaining member 84, etc. to the folded piece 23 and the vertical member flange 33 from the front side.

[0030] As shown in FIGS. 5( a ) and 5 ( b ), the other vertical member flange 34 is joined to the horizontal member 32 by a bolt 53 .

[0031] As shown in Figures 3(a) and 3(b), the vertical member webs 35 are spaced apart from the face plate rib 22. This forms a space S between the vertical member webs 35 and the face plate rib 22. The formation of this space makes it possible to provide the first nuts 51a and grooves 25 described above. Furthermore, as shown in Figure 2, the vertical member webs 35 and the face plate rib 22 are spaced apart, so that they do not come into surface contact with each other, thereby suppressing rattling between the vertical member webs 35 and the face plate rib 22.

[0032] 5, a second nut 39a for attaching a lifting jig 39 such as an eyebolt is provided at the top of the vertical member 31. By attaching the lifting jig 39 to the second nut 39a, it becomes easier to lift the frame portion 3 using a lifting device such as a crane.

[0033] The vertical length of the vertical members 31 is approximately the same as the vertical length of the face plate 2. In this case, when a horizontal load such as a wind load acts on the face plate 2, the load can be easily distributed to the vertical members 31, which have approximately the same length as the face plate 2. It is preferable that the length of the vertical members 31 be at least half the length of the face plate 2.

[0034] For example, channel steel is used for the horizontal members 32. The horizontal members 32 are arranged in three stages, for example, at the upper end, central portion, and lower end portion of the vertical members 31, but the number of stages of the horizontal members 32 is arbitrary.

[0035] 2, the base 4 is fixed to the structural frame by anchor bolts (not shown) or the like. The base 4 is joined to the frame 3 by mechanical joining means (not shown). The base 4 has a base plate 41, a base flange 42, and a base web 43.

[0036] A steel plate is used for the base plate 41. Holes 45 for receiving anchor bolts for joining the base plate 41 to a structural frame are formed in the base plate 41. The base flange 42 stands upright from the base plate 41.

[0037] As shown in Figures 3(a) and 3(b), the base flange 42 is joined to the vertical member 31 by bolts 52, which serve as mechanical joining means. A pair of base flanges 42 is provided. The pair of base flanges 42 have folded back pieces 44 formed by folding back the front end portions in directions that bring them closer to each other. The folded back pieces 44 can increase the rigidity of the base flanges 42.

[0038] 5, the front side of the base flange 42 has a protruding portion 46 that protrudes beyond the vertical member 31, and the front side of the upper end of the protruding portion 46 has a notch 42a. The notch 42a makes it easier to turn a tool such as a wrench that tightens the anchor bolt that joins the base 4 to the structural frame. The notch 42a also makes it possible to reduce the weight of the base flange 42.

[0039] 3(a) and 3(b), the base web 43 stands upright from the base plate 41. The base web 43 is joined to the cross member 32 by bolts 52 as mechanical joining means.

[0040] <How to build a soundproof wall> The method for constructing a soundproof wall uses the soundproof wall unit 1. The method for constructing a soundproof wall includes a face plate joining step, a frame portion joining step, and a base portion joining step.

[0041] As shown in FIG. 6(a), in the frame portion joining step, the frame portion 3 and the base portion 4 are joined together.

[0042] As shown in FIG. 6(b), in the face plate joining step, the face plate 2 and the frame portion 3 are joined together.

[0043] In the base joining step, the base 4 and the structural frame are joined together with anchor bolts.

[0044] In the method for constructing a soundproof wall, it is preferable to carry out the base joining step after the frame joining step and the face plate joining step. That is, when constructing a soundproof wall, the face plate 2, frame 3, and base 4 are joined in advance in a factory or the like, and then transported to the site. Then, the base 4, with the face plate 2 and frame 3 joined together, is joined to the structural frame. This reduces the amount of work on site when constructing the soundproof wall, making construction easier.

[0045] In the method for constructing a soundproof wall, the order of the face plate joining step, the frame portion joining step, and the base portion joining step can be arbitrary.

[0046] <How to replace soundproof wall unit 1: Replacing panel 2> Next, we will explain the method for replacing the soundproof wall unit 1. The method for replacing the soundproof wall unit 1 first starts with the soundproof wall unit 1 being attached to the structural body, as shown in Fig. 2. The method for replacing the soundproof wall unit 1, which replaces the face panel 2, includes a removal process and a face panel joining process.

[0047] In the removal process, the connection between the face plate 2 and the frame portion 3 of the soundproof wall unit 1 installed on the structural frame is released, and the face plate 2 is removed upward along the frame portion 3.

[0048] Then, in the panel joining process, a new panel 2 is inserted from above the existing frame part 3, which was released from its joining with the panel 2 in the removal process, and the new panel 2 and the existing frame part 3 are joined by a mechanical joining means.

[0049] This completes the method for replacing the soundproof wall unit 1 by replacing the face plate 2.

[0050] <How to replace soundproof wall unit 1: Replacing face plate 2 and frame 3> Next, a description will be given of a method for replacing the soundproof wall unit 1 by replacing the face plate 2 and the frame portion 3. The method for replacing the soundproof wall unit 1 by replacing the face plate 2 and the frame portion 3 includes a removal step, a face plate joining step, and a frame portion joining step.

[0051] First, in the removal process, the base 4 joined to the structural body and the existing frame 3 are released from the mechanical joining means, and the existing frame 3 is removed from the base 4. In the removal process, when removing the existing frame 3 from the base 4, the frame 3 may be removed with the face plate 2 still joined. Since the face plate 2 and the frame 3 can be removed together, the removal work is easy.

[0052] In the frame portion joining process, after the existing frame portion 3 is removed from the base portion 4 in the removal process, the base portion 4 and a new frame portion 3 are joined by a mechanical joining means. Then, in the face plate joining process, a new face plate 2 is inserted into the new frame portion 3 and the new face plate 2 and the new frame portion 3 are joined together.

[0053] This completes the method for replacing the soundproof wall unit 1, which involves replacing the face plate 2 and the frame portion 3. In the method for replacing the soundproof wall unit 1, the face plate joining step and the frame portion joining step may be performed in any order.

[0054] <How to replace the soundproof wall unit 1: Replacing the face plate 2, frame 3, and base 4> Next, a description will be given of a method for replacing the soundproof wall unit 1 by replacing the face plate 2, frame portion 3, and base portion 4. The method for replacing the soundproof wall unit 1 by replacing the face plate 2, frame portion 3, and base portion 4 includes a removal step, a frame portion joining step, a face plate joining step, and also a base joining step.

[0055] First, in the removal step, the base 4 is removed from the structural frame. In the removal step, when removing the base 4 from the structural frame, the base 4 may be removed while the face plate 2 and the frame 3 are still joined together. Since the face plate 2, the frame 3, and the base 4 can be removed all at once, the removal work is easy.

[0056] After the base 4 is removed from the structural frame in the removal step, the above-described method for constructing a soundproof wall is carried out, that is, the base joining step, frame joining step, and face plate joining step are carried out.

[0057] This completes the method for replacing the soundproof wall unit 1, which involves replacing the face plate 2, frame portion 3, and base portion 4. In the method for replacing the soundproof wall unit 1, the face plate joining step, frame portion joining step, and base portion joining step can be performed in any order.

[0058] According to this embodiment, the frame section 3 is disposed between the main plate section 21 and the folded piece 23 of the face plate 2. The folded piece 23 is joined to the frame section 3 by a mechanical joining means. The face plate 2 is configured to be vertically removable along the frame section 3 when released from its connection with the frame section 3. Because the frame section 3 is enclosed by the face plate 2, the frame section 3 is protected by the face plate 2 from deterioration factors such as salty sea breezes and factory exhaust gases, as well as flying debris caused by wind pressure from trains. This extends the life of the frame section 3 and allows for the replacement of only the face plate 2, which is prone to deterioration. Furthermore, if the frame section 3 is also deteriorated, the face plate 2 and the frame section 3 can be replaced together. To replace the face plate 2, simply insert the face plate 2 into the frame section 3 and fasten them together with bolts or the like. This allows for easy replacement of components depending on the deterioration level.

[0059] Furthermore, according to this embodiment, the face plate 2 is configured to be insertable and removable in the vertical direction along the frame portion 3, so when a horizontal load such as a wind load acts on the face plate 2, the load can be distributed to the frame portion 3 joined to the face plate 2. This makes it possible to prevent components such as the face plate 2 and the bolts 51 from falling.

[0060] Furthermore, according to this embodiment, the folding pieces 23 are joined to the frame section 3 by mechanical joining means. This allows the face plate 2 to be removed from and joined to the frame section 3 from the front side where the track is installed. Therefore, even when the soundproof wall unit 1 is installed on a viaduct or the like, for example, there is no need to set up scaffolding or the like outside the viaduct, making inspection and replacement easy.

[0061] Furthermore, according to this embodiment, the device further includes a base 4 that is joined to the structural frame, and the base 4 is joined to the frame 3 by mechanical joining means. This also makes it easy to replace the base 4.

[0062] According to this embodiment, the frame portion 3 has a pair of vertical members 31 to which the folded pieces 23 are joined, and a horizontal member 32 that connects the pair of vertical members 31. This increases the rigidity of the frame portion 3. This makes it easier for the frame portion 3 to maintain its shape, making it even easier to insert and remove the face panel 2.

[0063] According to this embodiment, the base 4 has a base plate 41 and a base flange 42 that stands up from the base plate 41 and is joined to the vertical member 31. This increases the rigidity of the base 4. Furthermore, the frame 3 and the base 4 can be joined from the front side where the track is installed. Therefore, even when the soundproof wall unit 1 is installed on a viaduct or the like, for example, there is no need to set up scaffolding or the like outside the viaduct, making replacement easy.

[0064] According to this embodiment, the front side of the base flange 42 has a protruding portion 46 that protrudes beyond the vertical member 31, and the front side of the upper end of the protruding portion 46 has a notch 42a. This makes it easier to turn a tool such as a wrench that tightens the anchor bolt that joins the base 4 to the structural frame. In addition, the cutout 42a makes it possible to reduce the weight of the base flange 42.

[0065] According to this embodiment, the vertical member 31 has a pair of vertical member flanges 33, 34 extending along the folded-back piece 23, and a vertical member web 35 connecting the pair of vertical member flanges 33, 34 and extending along the face plate rib 22, with the folded-back piece 23 joined to one of the vertical member flanges 33, and the vertical member web 35 being spaced apart from the face plate rib 22. This forms a space between the vertical member web 35 and the face plate rib 22. The formation of this space makes it possible to provide the first nut 51a and groove portion 25 described above. Furthermore, if the vertical member web 35 and the face plate rib 22 were in surface contact, rattle would easily occur due to this surface contact. However, by separating the vertical member web 35 and the face plate rib 22, they do not come into surface contact, and rattle between the vertical member web 35 and the face plate rib 22 can be suppressed.

[0066] According to this embodiment, the folded piece 23 has a first through hole 27 formed therein, the vertical member 31 has a second through hole 36 formed therein that faces the first through hole 27, and a first nut 51a is fixed to the opposite side of the first through hole 27 across the second through hole 36. This makes the bolt 51 a so-called one-sided bolt, and the bolt 51 can be used to join accessory members such as a lid receiving member 82, a sound-absorbing panel 83, and a retaining member 84 to the folded piece 23 and the vertical member flange 33 from the front side.

[0067] According to this embodiment, one of the face plate ribs 22 has a protrusion 24 that protrudes toward the face plate rib 22 of one of the adjacent soundproof wall units 1, and the other face plate rib 22 has a groove 25 into which the protrusion 24 of the other adjacent soundproof wall unit is fitted, and the groove 25 is provided with a filler 26. As a result, when the protrusion 24 and the groove 25 are fitted together, the filler 26 is crushed, reducing the gap between the protrusion 24 and the groove 25, and therefore noise leakage from this gap can be prevented.

[0068] According to this embodiment, a second nut 39a for joining a lifting jig 39 is fixed to the top of the frame portion 3. By providing a lifting jig 39 such as an eyebolt to the second nut 39a, it becomes easier to lift the frame portion 3 using a lifting device such as a crane.

[0069] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Furthermore, the present invention can be embodied in various novel forms in addition to the above-described embodiments. Therefore, various omissions, substitutions, and modifications are possible in the above-described embodiments without departing from the spirit and scope of the present invention. Such novel forms and modifications are included within the scope and spirit of the present invention, as well as within the scope of the inventions set forth in the claims and equivalents of the inventions set forth in the claims. [Explanation of symbols]

[0070] 1: Soundproof wall unit 2: Face plate 21: Main plate part 22: Face plate rib 23: Folded piece 24:Protrusion 25: Groove 26: Filling material 27: First through hole 3: Frame section 31: Vertical member 32: Horizontal material 33: Vertical member flange 34: Vertical member flange 35:Vertical member web 36: Second through hole 39: Hanging jig 39a: Second nut 4: Base 41: Base plate 42: Base flange 42a: Notch 43: Base Web 44: Folded piece 45: Hole 51: Bolt 51a: First nut 52: Bolt 53: Bolt 8: Bridge 80: Trough 81: Lid 82: Lid receiving member 83: Sound-absorbing panel 84: Holding member

Claims

1. A soundproof wall unit installed alongside a structural frame, a face plate made of a steel plate; a frame portion joined to the face plate, The face plate has a main plate portion, face plate ribs folded back from left and right end portions of the main plate portion, and folded-back pieces folded back from the left and right face plate ribs in directions approaching each other, the frame portion is disposed between the main plate portion and the folded-back piece, the folded piece is joined to the frame portion by a mechanical joining means, The face plate is configured to be removable in the up and down direction along the frame portion when the face plate is released from the frame portion. A soundproof wall unit featuring:

2. Further comprising a base portion joined to the structural body, The base is joined to the frame by a mechanical joining means.

2. The soundproof wall unit according to claim 1,

3. The frame portion has a pair of vertical members to which the folded pieces are joined, and a horizontal member connecting the pair of vertical members.

3. The soundproof wall unit according to claim 2, wherein

4. The base portion includes a base plate and a base flange that stands up from the base plate and is joined to the vertical member, The front side of the base flange has a protruding portion that protrudes beyond the vertical member, The front side of the upper end of the protruding portion has a notch.

4. The soundproof wall unit according to claim 3,

5. The base portion includes a base plate, a base flange standing from the base plate and joined to the vertical member, and a base web standing from the base plate and joined to the horizontal member.

4. The soundproof wall unit according to claim 3,

6. the frame portion has a vertical member to which the folded piece is joined, The vertical members are: A pair of vertical flanges extending along the folded-back piece; a vertical member web connecting the pair of vertical member flanges and extending along the face plate rib; The folded piece is joined to one of the vertical member flanges, The longitudinal member webs are spaced from the face plate ribs.

3. The soundproof wall unit according to claim 2, wherein

7. The folded piece has a first through hole formed therein, The vertical member has a second through hole formed therein opposite to the first through hole, and a first nut is fixed to the opposite side of the first through hole across the second through hole.

3. The soundproof wall unit according to claim 2, wherein

8. one of the face plate ribs has a protrusion that protrudes toward the face plate rib of one of the adjacent soundproof wall units, the other face plate rib has a groove into which a protrusion of the other adjacent soundproof wall unit is fitted, The groove portion is provided with a filler material.

3. The soundproof wall unit according to claim 2, wherein

9. A second nut for joining a lifting jig is fixed to the top of the frame portion.

3. The soundproof wall unit according to claim 2, wherein

10. 2. A method for replacing a soundproof wall unit according to claim 1, comprising: a removal process of releasing the face plate from the frame portion by the mechanical joining means and removing the face plate upward along the frame portion; a face plate joining step of inserting a new face plate different from the face plate from above the frame portion and joining the new face plate to the frame portion by a mechanical joining means. A method for replacing a soundproof wall unit.

11. 3. A method for replacing a soundproof wall unit according to claim 2, comprising: a removal process of releasing the connection between the base and the frame, which are connected to a structural body by a mechanical connecting means, and removing the frame to which the face plate is connected from the base; a frame portion joining step of joining the base portion and a new frame portion by mechanical joining means; a face plate joining step of inserting a new face plate different from the face plate from above the new frame portion and joining the new face plate and the new frame portion by mechanical joining means. A method for replacing a soundproof wall unit.

12. A method for constructing a soundproof wall using the soundproof wall unit according to claim 1, a face plate joining step of joining the face plate and the frame portion by a mechanical joining means; A method for constructing a soundproof wall, characterized by:

13. a frame portion joining step of joining the frame portion and the base portion by a mechanical joining means; a base joining step of joining the base and the structural frame by mechanical joining means.

13. A method for constructing a soundproof wall according to claim 12.

14. The base joining step is carried out after the face plate joining step and the frame joining step.

14. The method for constructing a soundproof wall according to claim 13,

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