JP6633991B2 - Noise barrier - Google Patents

Description

  The present invention relates to a sound insulation wall erected on a side of a road.

  As in Patent Literatures 1 to 4, sound insulation walls are erected on both sides of the road in order to block noise generated from the road and preserve the living environment around the road (private land). The sound insulation wall is configured to include a plurality of columns, such as H-shaped steel, provided upright in the vertical direction and provided at intervals in the direction in which the road extends, and a sound insulation plate into which a flange of the H-shaped steel is dropped as a guide groove. Is done.

  As a sound insulating plate, a metal sound insulating plate in which a sound absorbing material is accommodated in a steel casing, and a light transmitting sound insulating plate including a light transmitting plate member and a frame member are known. The latter has features such as release from the feeling of obstruction and securing views such as scenic spots.

  The sound insulating plate is required to have a predetermined safety performance. For example, according to Non-Patent Document 1, a sound insulating plate is required to have flame resistance and impact resistance. As for the fire resistance performance, when the sound insulating plate burns due to a vehicle fire or the like, it is required that the burning mode be such that the risk of secondary disaster is small, and a test method is determined by Non-Patent Document 2 and the like.

  The impact resistance performance is required to minimize the effect of the damage mode on the human body when the load of the vehicle collides and the sound insulation plate is damaged, and the test method is determined by Non-Patent Document 2, etc. Can be Since the sound insulation plate installed at a position higher than the load of the vehicle is not considered to be damaged by the load in the first place, the impact resistance is set to a predetermined height (4.5 m) from the road surface. Required for sound insulation boards.

JP-A-9-41329 JP 2003-342919 A JP 2003-342920 A JP 2005 68852 A

"Design Guidelines Vol. 5, Traffic Management Facilities [Sound Insulation Wall Design Guidelines]", Expressway Research Institute, Inc., July 2015, p. 11-12 "Sound insulation wall construction management guidelines", Expressway Research Institute, Inc., July 2015, p. 6-9 "Sound insulation wall standard design drawings", Expressway Research Institute, Inc., July 2015

  By the way, there is a case where the same sound insulating plate is erected at the entire height, although the safety performance (impact resistance performance) differs depending on the installation height. Although this has the advantage of providing a uniform appearance, it can be costly in some cases. Therefore, an object of the present invention is to provide a sound insulating wall which can satisfy the safety performance and can reduce the cost as compared with the related art.

  The present invention relates to a sound insulation wall erected on a side of a road. The sound insulation wall is provided upright at a plurality of intervals along the direction in which the road extends, and a column having a pair of flanges extending in the direction of extension, and the column using the pair of flanges as guide means. And a plurality of sound insulation plates that are stacked and erected therebetween. The sound insulation plate laminated at least to a height of 4.5 m or less from the road surface includes a light transmitting plate member made of a resin material. The sound insulating plate laminated in a region exceeding a height of at least 4.5 m from the road surface includes a light-transmitting plate member made of single-paned glass.

  According to the present invention, it is possible to provide a sound insulating wall that satisfies safety performance and can reduce the cost compared to the related art.

It is a perspective view which shows the example of installation of the sound insulation wall which concerns on this Embodiment. It is a sound insulation board of the sound insulation wall concerning this Embodiment, and is a perspective view which illustrates a sound insulation board in which a translucent board member was constituted from resin material. It is a sound insulation board of the sound insulation wall concerning this Embodiment, and is a perspective view which illustrates the sound insulation board in which the translucent board member was constituted from netted single glass. It is a side sectional view of the sound insulation wall concerning this embodiment.

  FIG. 1 illustrates a sound insulating wall 10 according to the present embodiment. 1 and 4, the X axis indicates the direction in which the road extends, the Y axis indicates the width direction of the road, and the Z axis indicates the height direction (vertical direction). The sound insulation wall 10 is installed on a side of a road 12 such as a highway. As shown in FIG. 1, the sound insulation wall 10 is fixed to a side surface of a foundation 18 provided on a side portion of the road 12 by a fixing means such as an anchor bolt.

  The sound insulation wall 10 includes a straight wall portion 14 extending in the height direction (Z-axis direction) from a side portion of the road 12 and an arch-shaped protrusion 16 extending toward the road 12. The sound insulation wall 10 is installed, for example, so as to have a height of about 8 m from the road surface 32 of the road 12.

  The sound insulating wall 10 includes a support 20 and a sound insulating plate 22 (22A, 22B). The plurality of columns 20 are erected at intervals along the direction in which the road 12 extends (the X-axis direction). The standing intervals are determined according to the width (length in the X-axis direction) of the sound insulating plate 22, and are provided at, for example, 2 m intervals or 4 m intervals.

  The support 20 is made of, for example, an H-shaped steel. The strut 20 extends along the extending direction (X-axis direction), and includes a pair of flanges 24A and 24B opposed in a direction orthogonal to the extending direction (Y-axis direction), and a web 26 connecting both flanges. Prepare. The support 20 is a member serving as a skeleton of the sound insulating wall 10, and is bent (for example, cold bent) into the shape of the straight wall portion 14 and the overhang portion 16.

  The sound insulating plate 22 according to the present embodiment includes a sound insulating plate 22A having a light transmitting plate member 28A made of a resin material (see FIG. 2), and a sound insulating plate 22B having a light transmitting plate member 28B made of mesh single glass. It is comprised including. The sound insulating plate 22A is laminated at least in an area h (road surface ≦ h ≦ 4.5m) from the road surface 32 to 4.5 m or less, and the sound insulating plate 22B is at least an area h (4.5 m) that exceeds 4.5 m from the road surface. <H).

  FIG. 2 illustrates the sound insulating plate 22A. 2 and 3, the longitudinal direction of the sound insulating plate 22 is indicated by the X axis, the thickness direction is indicated by the Y axis, and the height direction is indicated by the Z axis. When the sound insulation wall is installed, the X axis, the Y axis, and the Z axis in FIGS. 1 and 2 and FIGS.

  The sound insulating plate 22A includes a light transmitting plate member 28A and a frame member 30. As shown in FIG. 2, the sound insulating plate 22A may include two light transmitting plate members 28A, 28A with the central frame 30A interposed therebetween.

  The dimensions of the sound insulating plate 22A are, for example, about 1960 m or 3960 mm in length (X-axis direction), 95 mm in thickness (Y-axis direction), and about 1000 mm in height (Z-axis direction), as described in Non-Patent Document 3. It is formed so that it becomes.

  The frame member 30 supports four sides of the light transmitting plate member 28A. The frame member 30 includes a center frame 30A, an upper frame 30B, a lower frame 30C, and a side frame 30D. Each of the frame members includes a pair of pressing members that sandwich the light transmitting plate member 28A in the thickness direction (Y-axis direction). Each of the frame members 30 is made of a steel frame material or an aluminum frame material. In the case of a steel frame material, the frame member 30 is made of a highly weather-resistant plated steel plate such as SGH400. When the frame member 30 is an aluminum frame material, for example, an aluminum material defined by JIS H 4100 is used.

  The translucent plate member 28A is a rectangular thin plate member made of a resin material such as polycarbonate and acrylic. In the case of polycarbonate, a polycarbonate plate defined by JIS K 6735 is used as the light transmitting plate member 28A. In the case of acrylic, an acrylic plate defined by JIS K 6718-1 (cast plate) or JIS K 6718-2 (extruded plate) is used as the light transmitting plate member 28A.

  The sound insulation plate 22A has impact resistance and flame resistance. For example, regarding the impact resistance, when the test method 902 defined in Non-Patent Document 2 is performed, the light transmitting plate member 28A is so arranged that the scattering prevention rate is 99.0% or more and the maximum fragment weight is 1.0 g or less. It is formed.

  As for the flame resistance, the light transmitting plate member 28A is formed so as to have the flame resistance required by the test method 906 specified in Non-Patent Document 2. When the translucent plate member 28A is made of acrylic, it is preferable to have the flame resistance required by the test method 904 specified in Non-Patent Document 2 in addition to the test method 906.

  As shown in FIG. 3, the sound insulating plate 22B includes a light transmitting plate member 28B and a frame member 30. Similarly to the sound insulating plate 22A, the sound insulating plate 22B may include two light transmitting plate members 28B and 28B with the central frame 30A interposed therebetween.

  The size of the sound insulating plate 22B may be the same as that of the sound insulating plate 22A. For example, as described in Non-Patent Document 3, the length (X-axis direction) is about 1960 m or 3960 mm, the thickness (Y-axis direction) is about 95 mm, and the height (Z-axis direction) is about 1000 mm.

  The size, configuration, and material of the frame member 30 may be the same as those of the sound insulating plate 22A. That is, the frame member 30 includes the central frame 30A, the upper frame 30B, the lower frame 30C, and the side frame 30D that support the four sides of the translucent plate member 28B. Each of the frame members includes a pair of pressing members that sandwich the light transmitting plate member 28B in the thickness direction (Y-axis direction). The side frame 30 </ b> D of the sound insulating plate 22 </ b> B installed on the overhang 16 of the sound insulating wall 10 may be curved so as to follow the arch shape of the overhang 16. In this case as well, the light transmitting plate member 28B may have a flat (flat) shape.

  The translucent plate member 28B is a rectangular thin plate member made of mesh single glass. For example, a lattice-shaped aluminum net oriented at 45 ° and −45 ° with respect to the X-axis direction in FIG. 3 is embedded in the single-pane glass. As the screened single glass, for example, screened single glass specified in JIS R 3204 is used.

  The sound insulating plate 22B has flame resistance. For example, the light transmitting plate member 28A is formed so as to have the flame resistance required by the test method 906 specified in Non-Patent Document 2.

  FIG. 4 illustrates a side cross-sectional view (ZY cross section) of the sound insulating wall 10 according to the present embodiment. The sound insulating wall 10 is fixed to the side surface of the road 12 by driving the anchor bolt 36 into the lowermost concrete sound insulating plate 34. Using the flanges 24A and 24B of the support 20 as guide means (guide grooves), a plurality of sound insulation plates 22A and 22B are stacked between the adjacent supports 20 and 20. A fixing bracket may be inserted into a gap between the flange 24B and the back surfaces of the sound insulation plates 22A and 22B. Further, a wire (not shown) for preventing falling off may be passed through an eyebolt (not shown) provided on the side of the sound insulating plates 22A and 22B.

  In the present embodiment, when the sound insulating plates 22 are stacked, the sound insulating plates 22 (at least a part of which is included in the region of 4.5 m or less included in the region of 4.5 m or less in height from the road surface 32 of the road 12). As a plate, a sound insulation plate 22A including a light-transmitting plate member 28A made of a resin material having impact resistance and flame resistance is provided. Further, as a sound insulating plate 22 (a sound insulating plate not included in a region of 4.5 m or less) laminated at least in a region exceeding a height of 4.5 m from the road surface 32, a light-transmitting plate made of a single plate glass having flame resistance is used. The sound insulating plate 22B including the member 28B is provided.

  As described above, according to Non-Patent Documents 1 and 2, the sound insulating plate 22 installed at a height of 4.5 m or less from the road surface 32 is required to have impact resistance and flame resistance. The sound insulating plate 22 installed at a height exceeding 5 m is required to have flame resistance. As described above, in the present embodiment, the sound insulating plates 22A and 22B are appropriately selected according to the required performance that changes according to the height from the road surface.

  In general, it is known that polycarbonate has a higher unit price per unit area as compared with netted single-pane glass. Therefore, as compared with the case where the sound insulating plates 22A are stacked upright over the entire height of the sound insulating wall 10, the use of the relatively inexpensive sound insulating plates 22B in the area exceeding 4.5 m from the road surface 32 provides a safety. The cost can be reduced while satisfying the performance.

  Further, the netted glass is characterized in that when the glass is broken, the broken pieces are captured by the net, and scattering is avoided. Therefore, by making the sound insulating plate 22 installed just above the road surface 32 such as the overhanging portion 16 of the sound insulating wall 10 into a sound insulating plate 22B using a netted veneer glass as the light transmitting plate member 28B, the light transmitting plate member 28B is formed. Even if it is damaged by an earthquake, a stepping stone, or the like, the glass piece is prevented from falling on the road surface. Thereby, scattering of the glass piece to the resin light-transmitting plate member 28 </ b> A, which is relatively easily scratched or scratched, is suppressed.

  In addition, by using single-pane glass as the netted glass, it is possible to reduce the weight as compared with, for example, laminated glass. For example, in order to sufficiently provide impact resistance and fire resistance, even if the resin-made light-transmitting plate member 28A is thick and heavy, the light-transmitting plate member of the sound insulating plate 22 laminated on the resin light-transmitting plate member 28A can be used. Since 28B is made of a lightweight single-paned glass sheet, an increase in the weight of the entire sound insulating wall 10 can be suppressed. Therefore, a load on a bridge or the like that supports the sound insulating wall 10 and the road 12 is suppressed.

  Furthermore, when the laminated glass is provided on the upper layer of the sound insulating wall 10, when a fire occurs on the road 12, a temperature difference between the road side glass and the private side glass may occur, and the glass may be separated (cracked). However, such detachment is avoided by using single-pane glass.

DESCRIPTION OF SYMBOLS 10 sound insulation wall, 12 roads, 20 support | pillars, 22A, 22B sound insulation board, 28A, 28B translucent board member, 32 road surfaces.

Claims (1)

A sound insulation wall standing on the side of the road,
A plurality of columns that are erected at intervals along the direction of extension of the road and have a pair of flanges that extend in the direction of extension,
A plurality of sound insulation plates stacked upright between the columns using the set of flanges as guide means,
With
The sound insulating plate laminated at least up to a height of 4.5 m or less from the road surface is an acrylic plate made of a polycarbonate plate having a thickness specified by JIS K 6735 and a cast plate having a thickness specified by JIS K 6718-1. Or, an acrylic plate made of an extruded plate having a thickness determined by JIS K 6718-2, and including a light-transmitting plate member having impact resistance and flame resistance specified by the sound insulation wall construction management guidelines ,
The sound insulating plate laminated at least in a region exceeding the height of 4.5 m from the road surface has a thickness specified by JIS R 3204 and has a flameproof performance specified by the sound insulating wall construction management procedure. Comprising a plate member,
A sound-insulating wall, characterized in that:

Images