JP2021173089A - Sound proof wall and sound proof member - Google Patents

Abstract

To provide a sound proof wall and a sound proof member that have improved workability.SOLUTION: A sound proof wall 10 includes multiple pillar parts 13 provided at intervals in the installation direction of the sound proof wall 10 and a wall part 14 with both ends supported by a pair of pillar parts 13 adjacent to each other in the installation direction. The wall part 14 has a laminated structure in which multiple sound proof members 20 are stacked. Each of the sound proof members 20 is supported at both ends by the pair of pillar parts 13, and formed into square cylinder having hollow parts 25. Each of the sound proof members 20 is made of cement-based material mixed with fibers to reduce the weight.SELECTED DRAWING: Figure 1

Description

The present invention relates to soundproof walls and soundproof materials.

On highways and railways, noise barriers are installed as a noise countermeasure to the surrounding area. For example, in the soundproof wall described in Patent Document 1, a plurality of columns are installed at predetermined intervals along the installation direction of the soundproof wall, and both ends of a wall portion made of a hollow plate material made of reinforced concrete are connected to both ends of the columns. It is composed by supporting.

Jitsukaisho 51-2502 No. 13

In the soundproof wall described in Patent Document 1, if a higher soundproof effect is to be obtained, the hollow plate material constituting the wall portion becomes heavier, and thus the workability is lowered.

The soundproof wall for solving the above problems includes a plurality of pillars provided at intervals in the installation direction of the soundproof wall, and a wall portion whose both ends are supported by a pair of the pillars adjacent to each other in the installation direction. The wall portion has a laminated structure in which a plurality of soundproofing materials formed of a cement-based material mixed with fibers are stacked, and has a plurality of hollow portions formed by the soundproofing material. ..

In the soundproof wall having the above structure, it is preferable that the soundproof material has a square cylindrical shape.
In the soundproof wall having the above structure, it is preferable that a sealing material is disposed under each of the soundproofing materials.

The soundproofing material for solving the above problems includes a pair of side wall portions facing each other at intervals and a connecting portion for connecting the pair of side wall portions, and is formed of a cement-based material mixed with fibers and is stacked. By doing so, a wall portion of the soundproof wall is formed, and a hollow portion is formed in the wall portion in a space surrounded by the pair of side wall portions and the connecting portion.

According to the present invention, the weight of the soundproof material can be reduced, and the workability of the soundproof wall can be improved.

The perspective view which shows the schematic structure of one Embodiment of a soundproof wall. Sectional drawing which shows the soundproof wall in the vicinity of a foundation. It is a figure which shows typically the manufacturing method of the soundproof material, (a) the perspective view which shows the mold, (b) the cross-sectional view which shows the state which the outer wall part was formed by the 1st casting process, (c). The perspective view which shows the space formation process. It is a figure which shows typically the manufacturing method of the soundproof material, (a) is the cross-sectional view which shows the state which the upper end connecting part, the lower end connecting part, and the inner side wall part were formed by the 2nd casting process, (b). A cross-sectional view showing a die-cutting process, and (c) a perspective view showing a removing process. It is sectional drawing of the wall part which shows the example of the soundproof material in the modification, (a) the figure which shows the case where the hollow part formed by a soundproof material is partitioned by a seal material, (b) is formed by a soundproof material. The figure which shows the case where the hollow part is not partitioned by a sealing material. FIG. 5 is a cross-sectional view of a wall portion showing an example of a soundproofing material in a modified example. FIG. 5 is a cross-sectional view showing an example of a soundproofing material in a modified example. FIG. 5 is a cross-sectional view showing an example of a soundproofing material in a modified example. The perspective view which shows the schematic structure of the soundproof wall in the modification.

An embodiment of the soundproof wall will be described with reference to FIGS. 1 to 4. In the following, the noise source side is referred to as the inside, and the side opposite to the noise source is referred to as the outside, with the noise barrier as a reference.
As shown in FIG. 1, the soundproof wall 10 is composed of a foundation 11 extending in the installation direction of the soundproof wall 10 and a wall main body 12 provided on the foundation 11 along the installation direction of the soundproof wall 10.

The foundation 11 is made of, for example, a concrete material, and extends continuously in the installation direction of the soundproof wall 10.
The wall body 12 includes a plurality of pillars 13 fixed to the foundation 11 at predetermined intervals, and a wall 14 whose both ends are supported by a pair of pillars 13 adjacent to each other in the installation direction of the soundproof wall 10. have. Note that FIG. 1 shows only a pair of pillars 13 for the plurality of pillars 13.

The lower end of the pillar portion 13 is fixed to the foundation 11, and extends upward from the foundation 11. The pillar portion 13 has an H-shaped cross section that is open in the installation direction. The pillar portion 13 is, for example, H-steel, and is composed of an inner flange 15 facing inward, an outer flange 16 facing outward, and a web 17 for integrally connecting the central portion of the inner flange 15 and the central portion of the outer flange 16. Has been done. The pillar portion 13 is formed with a pair of recesses 18 having the web 17 as a bottom surface portion by the inner flange 15, the outer flange 16, and the web 17.

The wall portion 14 has a laminated structure in which a plurality of soundproofing materials 20 are stacked. The soundproofing material 20 has a width that can be inserted into the recess 18 of the pillar portion 13, and has a length that is slightly shorter than the distance between the webs 17 between the pair of pillar portions 13. The soundproofing material 20 has a pair of pillars so that one end is arranged in the recess 18 in one pillar 13 and the other end is arranged in the recess 18 in the other pillar 13. It is inserted so as to be fitted from above with respect to 13. The soundproofing material 20 inserted into the pair of pillars 13 has a flange in which the inward displacement is regulated by the inner side wall 21 of the pillar 13 and the outward displacement is regulated by the outer wall 22 of the pillar 13. It is supported between 15 and 16. The wall portion 14 is formed by stacking the soundproofing materials 20 to a predetermined height in this way. In the present embodiment, the wall portion 14 is formed by nine soundproofing materials 20.

The soundproofing material 20 is formed of a cement-based material (fiber reinforced concrete material) mixed with fibers, such as Slim Cleat (registered trademark). This cement-based material has a large tensile strength, and a member having a desired mechanical strength can be manufactured without using a reinforcing bar or the like as in reinforced concrete, for example. In addition, the member can be made thinner and lighter. Furthermore, by using steel fiber as the fiber, higher mechanical strength can be obtained.

As shown in FIG. 2, the soundproofing material 20 has a square cylindrical shape. The soundproofing material 20 includes an inner side wall portion 21 facing inward, an outer wall portion 22 facing the outside, an upper end connecting portion 23 for integrally connecting the upper end portion of the inner side wall portion 21 and the upper end portion of the outer wall portion 22, and an inner side wall portion. It has a lower end connecting portion 24 that integrally connects the lower end portion of the 21 and the lower end portion of the outer wall portion 22. The inner side wall portion 21 and the outer wall portion 22 are a pair of side wall portions facing each other at a distance. The outer side wall portion 22 has a larger wall thickness than the inner side wall portion 21. The soundproofing material 20 has a hollow portion 25 having a rectangular cross section, which is a space surrounded by the inner side wall portion 21, the outer wall portion 22, the upper end connecting portion 23, and the lower end connecting portion 24. The soundproofing material 20 attenuates the noise propagating through the soundproofing material 20 at the hollow portion 25.

As shown in FIG. 2, the wall portion 14 has a foundation sealing material 26 between the soundproofing material 20 located at the bottom and the foundation 11. The foundation sealing material 26 is arranged so that both ends are fitted into the recesses 18 of the pair of pillars 13. The foundation sealing material 26 is located below the soundproofing material 20 and covers the foundation 11 from above. The foundation sealing material 26 is a strip-shaped elastic material having a wall thickness larger than that of the intermediate sealing material 27 described later, and prevents the soundproofing material 20 from directly contacting the foundation 11 and the gap between the foundation 11 and the soundproofing material 20. Is filling.

Further, the wall portion 14 has an intermediate sealing material 27 between the soundproofing material 20 on the lower stage side and the soundproofing material 20 on the upper stage side. The intermediate sealing material 27 is arranged so that both ends are fitted into the recesses 18 of the pair of pillars 13. The intermediate sealing material 27 is located below the soundproofing material 20 on the upper stage side and covers the soundproofing material 20 on the lower stage side from above. The intermediate sealing material 27 is, for example, a strip-shaped elastic material, and fills the gap between the soundproofing materials 20.

(Manufacturing method of soundproof material 20)
A method of manufacturing the square cylindrical soundproofing material 20 constituting the wall portion 14 will be described with reference to FIGS. 3 and 4. In the following, the state of the cement-based material mixed with fibers before curing is referred to as a fluid material.

As shown in FIG. 3A, the soundproofing material 20 is manufactured by using the mold 30. The mold 30 has a bottom portion 31, a pair of side portions 32, and a pair of end portions 33, and is formed in a square box shape with an open upper portion. In the mold 30, the distance between the pair of end portions 33 is set to the same value as the length of the soundproofing material 20 or a value slightly larger than the length of the soundproofing material 20. It is preferable that the mold 30 is configured such that at least one of the pair of side portions 32 and the pair of end portions 33 can be attached to and detached from the bottom portion 31 so that the die can be easily removed after the fluid material is cured.

As shown in FIG. 3B, in the production of the soundproofing material 20, first, the first casting step is performed. In the first casting step, as shown by the arrow, an amount of fluid material corresponding to the volume of the outer wall portion 22 of the soundproofing material 20 is poured into the mold 30, and then the thickness of the outer wall portion 22 becomes uniform. It is molded so that the surface becomes flat.

Next, as shown in FIG. 3C, a space forming step is performed. In the space forming step, the space forming member 35 that imitates the outer shape of the hollow portion 25 formed in the soundproofing material 20 is arranged in the mold 30. The space forming member 35 has the design thickness of each connecting portion 23, 24 so that each end surface 36 comes into contact with the end portion 33 of the mold 30, and the distance between the side portions 32, 32 and the side surfaces 37, 37 is the design thickness of the connecting portions 23, 24. As such, it is placed on the outer wall portion 22. The space forming member 35 is a member that is removed after the fluid material is cured, and is preferably made of a material that can be easily removed after curing, such as a paper material.

Next, as shown in FIG. 4A, the second casting step is performed. In the second casting step, as shown by the arrows, an amount of fluid material corresponding to the volume of the upper end connecting portion 23, the volume of the lower end connecting portion 24, and the volume of the inner side wall portion 21 was poured into the mold 30. After that, the inner side wall portion 21 is formed so that the thickness is uniform and the surface is flat.

When the fluid material is cured, a die-cutting step is performed as shown in FIG. 4 (b). In the die cutting step, the soundproofing material 20 including the space forming member 35 is removed from the mold 30.

Finally, as shown in FIG. 4C, a removal step is performed. In the removing step, the space forming member 35 included in the soundproofing material 20 is removed. As a result, the square cylindrical soundproofing material 20 having the hollow portion 25 is manufactured.

(Construction method of soundproof wall 10)
In the soundproof wall 10 described above, first, the foundation 11 is formed, and each pillar portion 13 is fixed to the foundation 11 at a predetermined interval. Next, after arranging the foundation sealing material 26 so as to cover the foundation 11 from above between the pair of adjacent pillar portions 13, the lower end connecting portion 24 overlaps the foundation sealing material 26, and the inner side wall is formed. The soundproofing material 20 at the bottom is inserted so that the portion 21 faces inward. After that, the intermediate sealing material 27 is arranged so as to cover the upper end connecting portion 23 of the soundproofing material 20 from above, so that the lower end connecting portion 24 overlaps the intermediate sealing material 27, and the inner side wall portion 21 faces inward. A new soundproofing material 20 is inserted as described above. The wall portion 14 is formed by stacking the soundproofing materials 20 to a predetermined height in this way. Then, the soundproof wall 10 is completed by forming such wall portions 14 in various places. In the soundproof wall 10, the wall portion 14 reflects the noise inward, and the hollow portion 25 of each soundproof material 20 constituting the wall portion 14 attenuates the noise propagating through the wall portion 14.

The effect of this embodiment will be described.
(1) The wall portion 14 of the soundproof wall 10 is formed by stacking hollow soundproof materials 20 formed of a cement-based material mixed with fibers. As a result, the weight of the soundproofing material 20 constituting the wall portion 14 can be reduced. As a result, the handleability of the soundproof material 20 such as transportation and movement can be improved, and the workability of the wall portion 14 and, by extension, the workability of the soundproof wall 10 can be improved. In addition, the maintainability of the wall portion 14 can be improved, such as replacement of the soundproofing material 20.

(2) By forming the soundproofing material 20 from a cement-based material mixed with fibers, the wall thickness of each part of the soundproofing material 20 can be reduced while ensuring the necessary mechanical strength. As a result, the hollow portion 25 of the soundproofing material 20 can be enlarged, so that the noise damping effect of the soundproofing material 20 can be enhanced. Further, such an action effect becomes more remarkable by using steel fiber as the fiber.

(3) The soundproofing material 20 has a square cylindrical shape. As a result, the alignment of the soundproofing material 20 at the time of stacking can be facilitated, and the misalignment of the soundproofing material 20 after stacking can be suppressed. As a result, the soundproofing materials 20 can be easily stacked, and the workability of the wall portion 14 and the workability of the soundproofing wall 10 can be further improved. Further, for example, the mechanical strength of the soundproofing material 20 can be increased against an impact applied from the inside as the vehicle passes through.

(4) The soundproofing material 20 has a larger wall thickness on the outer wall portion 22 than on the inner side wall portion 21. As a result, for example, an impact is applied from the inside as the vehicle passes, and even if the soundproofing material 20 comes into contact with the outer flange 16 of the pillar portion 13, the contact portion is the thick outer wall portion 22. It becomes. Therefore, the mechanical strength of the soundproofing material 20 can be increased against contact with the pillar portion 13 due to such an impact.

(5) A foundation sealing material 26 is arranged between the foundation 11 and the soundproofing material 20. As a result, it is possible to suppress the propagation of noise through the gap between the foundation 11 and the soundproofing material 20.
(6) An intermediate sealing material 27 is arranged between the soundproofing material 20 on the lower stage side and the soundproofing material 20 on the upper stage side. As a result, it is possible to suppress the propagation of noise through the gaps between the soundproofing materials 20.

(7) The surface roughness of the foundation 11 may be larger than that of the soundproofing material 20. In this respect, in the soundproof wall 10, the foundation sealing material 26 has a wall thickness larger than that of the intermediate sealing material 27. As a result, the amount of elastic deformation of the foundation sealing material 26 can be easily secured, so that the gap between the foundation 11 and the soundproofing material 20 can be more reliably filled.

(8) At the time of manufacturing the soundproof material 20, the lower side of the outer wall portion 22 having a large wall thickness is supported by the bottom portion 31 of the mold 30, and the lower side of the inner side wall portion 21 having a small wall thickness is supported by the space forming member 35. Will be done. Thereby, the load acting on the space forming member 35 at the time of manufacturing the soundproofing material 20 can be reduced. As a result, the degree of freedom regarding the strength of the space forming member 35 can be increased.

This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
The basic sealing material 26 and the intermediate sealing material 27 may fill the gap formed under the soundproofing material 20, and are not limited to the strip-shaped elastic material, but may be an adhesive or grease applied to the soundproofing material 20. And so on. Further, the foundation sealing material 26 may be formed of a time-curing material such as the cement-based material mixed with the fibers described above.

In the soundproofing material 20, the wall thickness of the inner side wall portion 21 may be the same as the wall thickness of the outer wall portion 22, or the wall thickness of the inner wall surface portion 21 may be larger than the wall thickness of the outer wall portion 22. ..
-The soundproofing material 20 may be such that a plurality of hollow portions are formed on the wall portion 14 by being stacked.

For example, as shown in FIGS. 5A and 5B, the soundproofing material 20 has an inner side wall portion 21, an outer wall portion 22, a central portion of the inner side wall portion 21, and a central portion of the outer wall portion 22. It may have a central connecting portion 43 that is integrally connected, and an H-shaped cross section composed of these. Even with such a configuration, a plurality of hollow portions 45 are formed in the wall portion 14 by stacking the soundproofing materials 20.

In such a configuration, as shown in FIG. 5A, the intermediate sealing material 27 is located between the central connecting portions 43 in the stacked soundproofing materials 20 so that the hollow portions 45 are formed in the soundproofing materials 20. It may have a shape that divides the space. Further, as shown in FIG. 5B, the intermediate sealing material 27 is inside without partitioning the space between the central connecting portions 43 so that the hollow portion 45 is formed by stacking the soundproofing materials 20. It may have a shape sandwiched between each of the wall portion 21 and the outer wall portion 22.

Further, for example, as shown in FIG. 6, the soundproofing material 20 has a one-end connecting portion 46 that integrally connects one end of the inner side wall portion 21, the outer wall portion 22, the one end portion of the inner side wall portion 21 and the one end portion of the outer wall portion 22. , May be composed of these. Even with such a configuration, a plurality of hollow portions 47 are formed in the wall portion 14 by stacking the soundproofing materials 20.

-As shown in FIGS. 7 and 8, the soundproofing material 20 may be composed of a pair of partial soundproofing materials 50 which are formed of a cement-based material mixed with fibers and have a shape that can be fitted. Such a partial soundproofing material 50 is provided at the side wall portion 51 constituting the inner side wall portion 21 or the outer wall portion 22, the laminated surface portion 52 provided at one end of the side wall portion 51, and the other end portion of the side wall portion 51. It has a fitting portion 53 into which the laminated surface portion 52 is fitted. In the partial soundproofing material 50, the laminated surface portion 52 and the fitting portion 53 function as connecting portions that connect the side wall portions 51 to each other by fitting. FIG. 7 shows an example of the partial soundproofing material 50 that can be fitted in the width direction of the soundproofing material 20, and FIG. 8 shows an example of the partial soundproofing material 50 that can be fitted in the stacking direction of the soundproofing material 20. There is.

-As shown in FIG. 9, the soundproof wall 10 may have an eaves 60 on the upper part of the wall body 12.
The eaves 60 has a plurality of beam portions 61 connected to the pillar portion 13 and an eaves portion 62 whose both ends are supported by a pair of beam portions 61 adjacent to each other in the installation direction of the soundproof wall 10. ..

The base end portion of the beam portion 61 is connected to the inner flange 15 of the column portion 13, and extends inward from the upper portion of the column portion 13. The beam portion 61 has an H-shaped cross section that is open in the installation direction.

The eaves portion 62 is formed by inserting a plurality of eaves soundproofing materials 63 so as to fit both ends into the recesses of the pair of beam portions 61. The eaves soundproofing material 63 is formed of a cement-based material mixed with fibers, and has a concave shape with an open upper part. The eaves soundproofing material 63 may have a concave shape with an open bottom or a square cylinder shape. The weight can be reduced by making it concave.

In the soundproof wall 10 having such a configuration, it is possible to suppress the noise that goes around the wall body 12, that is, the noise that diffracts the wall body 12. The beam portion 61 may be connected to the pillar portion 13 before being fixed to the foundation 11, or may be connected to the pillar portion 13 after being fixed to the foundation 11. Further, a plurality of eaves 60 may be provided so as to be arranged in the vertical direction.

The cross-sectional shape of the hollow portion formed by the soundproofing material 20 is not limited to a rectangular shape, and may be, for example, a trapezoidal shape, a triangular shape, or a circular shape.
The shape of the soundproofing material 20 is not limited to a square cylinder, but may be a cylinder or a polygon. In such a configuration, these soundproofing materials 20 are formed into a shape that allows surface contact so as to suppress the propagation of noise through the gap between the soundproofing material 20 on the lower stage side and the soundproofing material 20 on the upper stage side. Is preferable.

10 ... Soundproof wall, 11 ... Foundation, 12 ... Wall body, 13 ... Pillar, 14 ... Wall, 15 ... Inner flange, 16 ... Outer flange, 17 ... Web, 18 ... Recess, 20 ... Soundproof material, 21 ... Inner Wall part, 22 ... Outer wall part, 23 ... Upper end connecting part, 24 ... Lower end connecting part, 25 ... Hollow part, 26 ... Basic sealing material, 27 ... Intermediate sealing material, 30 ... Mold, 31 ... Bottom, 32 ... Side Part, 33 ... end part, 35 ... space forming member, 36 ... end face, 37 ... side surface, 43 ... central connecting part, 45 ... hollow part, 46 ... one end connecting part, 47 ... hollow part, 50 ... partial soundproofing material, 51 ... Side wall, 52 ... Laminated surface, 53 ... Fitting, 60 ... Eaves, 61 ... Beam, 62 ... Eaves, 63 ... Soundproofing material for eaves.

Claims (4)

Multiple pillars provided at intervals in the installation direction of the soundproof wall,
A soundproof wall including a pair of pillars that are adjacent to each other in the installation direction and wall portions that support both ends.
The wall portion has a laminated structure in which a plurality of soundproofing materials formed of a cement-based material mixed with fibers are stacked, and has a plurality of hollow portions formed of the soundproofing material. The soundproof wall according to claim 1, wherein the soundproof material has a square cylindrical shape. The soundproof wall according to claim 1 or 2, wherein a sealing material is disposed under each of the soundproof materials. A pair of side walls facing each other at intervals,
A connecting portion for connecting the pair of side wall portions is provided.
It is formed of a cement-based material mixed with fibers, and is stacked to form a wall portion of a soundproof wall, and a hollow portion is formed in the wall portion in a space surrounded by the pair of side wall portions and the connecting portion. Soundproofing material.

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