JP2011058252A - Soundproof wall and construction method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soundproof wall which improves sound insulating performance without damaging its design, does not impair construction performance, and when a sound-absorbing material is updated, updates the sound-absorbing material at low costs in a short period of time without significantly deteriorating the sound insulating performance. <P>SOLUTION: The soundproof wall 1 includes a fiber-reinforced plastic (FRP) sound-insulating wall composed of a fiber-reinforced plastic sound-insulating panel 11 and a fitting portion 13 which has a depth equivalent to 2 to 20% of the height of the sound-insulating panel and has fixing through-holes for fixing the sound-insulating panel to a structure body. Sound-absorbing panels are attached to the noise-source side of the fiber-reinforced plastic (FRP) sound-insulating wall. A construction method for the soundproof wall is obtained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention mainly relates to a soundproof wall installed outdoors, and more specifically, a soundproof wall installed upright on both sides of a railway, a road, etc., or upright around a noise source such as a building facility. It is related to the sound barrier installed.

  Noise barriers have been installed on both sides of railway and road viaducts as a noise countermeasure around the neighborhood. In the past, soundproof walls made of reinforced concrete or steel plate have been used.

  In particular, in the case of railway applications, the soundproof wall made of reinforced concrete or steel plate is a heavy object, so that there is a problem that it takes a long time to install the soundproof wall. In order to solve this problem, in recent years, an FRP soundproof wall having good workability and capable of being mounted in a short period because it is lightweight has been used mainly for railway applications. Here, FRP means a fiber reinforced plastic.

  As for the shape of the soundproof wall, a flat panel-like shape is generally set against an H-shaped steel material built on both sides of the panel. Similarly, the FRP soundproof wall is a structure in which the FRP panel is placed against the H-shaped steel material. However, since the exposure of the H-type steel material is inferior in aesthetics, in recent years, as described in Patent Document 1, a self-supporting FRP soundproof wall considering design is frequently used.

  In these conventional FRP soundproof walls, the sound insulation performance is generally used. This sound insulation performance means the performance of shielding air-borne sound, and the sound transmission loss that quantitatively represents the sound insulation performance basically follows the law of mass and increases as the mass increases. Therefore, in the case of a heavy reinforced concrete or steel plate soundproof wall, a predetermined effect can be obtained in the prevention of noise generated from railway vehicles and automobiles and the diffusion of noise according to the mass law. According to this mass law, in the case of the conventional FRP soundproof wall, the weight is lighter than the soundproof wall made of reinforced concrete or steel plate, and the sound insulation performance is slightly inferior, and its improvement has been a problem. .

  Therefore, a method of satisfying the sound insulation performance by using a sound absorbing material in combination with a sound insulation material that does not satisfy the requirements can be considered. The sound absorbing material plays a role of attenuating sound pressure by converting sound energy into heat energy. Since the performance of insulating sound alone is low, it is not used alone and is generally used in combination with a sound insulating material. In view of this, in the FRP soundproof wall, as disclosed in Patent Document 2, an FRP soundproof wall having a sound absorbing portion has been proposed.

  In addition, for the purpose of solving the above-mentioned two problems, there is a soundproof wall which uses a sound insulating material and a sound absorbing material in combination as in Patent Document 3 and has an improved aesthetics so that the H-type steel material cannot be seen. Proposed.

  However, since the FRP soundproof wall proposed in Patent Document 2 has a panel shape, there is a problem that the H-shaped steel material supporting the FRP is exposed and inferior in appearance. Moreover, since the FRP panel part and the sound absorbing part are integrated, the weight of the sound absorbing part is added and the weight of the sound insulating wall itself is increased, so that there is a concern that the workability of the sound insulating wall is deteriorated.

  In addition, in the structure of the soundproof wall proposed in Patent Document 2 or Patent Document 3, when the sound absorbing material is replaced for the purpose of upgrading or maintaining the sound absorbing material, it is necessary to replace the entire sound insulating wall. During the period, there will be no noise barriers, so it will be necessary to provide additional noise countermeasures or restrict railway operation, which will increase the construction cost and construction period for sound-absorbing materials, hinder railway operation, etc. There's a problem.

JP 2008-184803 A (Claim 1, FIG. 1) JP 2003-293326 A (Claim 1, FIG. 1) JP-A-10-121599 (Claim 1, FIG. 1)

  The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a soundproof wall that does not impair workability while improving sound insulation performance without impairing design properties. Another object of the present invention is to provide a soundproof wall that can be renewed at a low cost and in a short construction period without significantly reducing the sound insulation performance even when the sound absorbing material is updated.

  In order to solve the above problems, the soundproof wall of the present invention employs the following configuration. That is, an FRP sound insulation wall composed of an FRP sound insulation panel and an attachment portion having a depth of 2 to 20% of the height of the sound insulation panel and provided with a fixing through hole that can be attached to a building frame. The soundproof wall is characterized in that a sound absorbing panel is installed on the noise source side.

  Moreover, in order to solve the said subject, the construction method of the soundproof wall of this invention employ | adopts the following structures. That is, the structure of the building is composed of an FRP sound insulation panel and a mounting portion that has a depth of 2 to 20% of the height of the sound insulation panel and is provided with a fixing through hole that can be attached to the structure of the building. The sound insulation wall is constructed by installing a sound insulation wall made of FRP, and then installing a sound absorbing panel on the noise source side of the sound insulation wall.

  According to the present invention, the sound insulation performance can be greatly improved by attaching the sound absorption panel having the sound absorption performance to the noise source side of the FRP sound insulation panel, and the FRP sound insulation wall and the sound absorption panel can be separately provided. Since it can be installed, the weight of the soundproof wall at the time of construction is not increased, the FRP soundproof wall can be easily installed, and good workability can be secured. Moreover, since only the sound absorbing panel needs to be replaced when the sound absorbing material is updated, the sound insulation performance can be upgraded and maintained at a low cost and in a short construction period. Moreover, the replacement work of the sound absorbing panel can be performed with the FRP sound insulation wall left, so although the sound insulation performance is slightly reduced, it does not interfere with the operation of railways, etc., so the sound absorbing effect is maintained. Panel replacement work is possible.

It is a perspective view of the soundproof wall concerning one mode of the present invention seen from the noise source side. It is a perspective view of the soundproof wall concerning one mode of the present invention seen from the direction opposite to a noise source. It is sectional drawing of the A type sound absorption panel used suitably by this invention. It is sectional drawing of the B type sound absorption panel used suitably by this invention. FIG. 2 is a partially enlarged cross-sectional view of the AA cross section when an A-type sound absorbing panel is fixed to a reinforcing stiffener in the sound barrier shown in FIG. 1. FIG. 2 is a partially enlarged cross-sectional view taken along the line AA when the A-type sound absorbing panel is fixed to the FRP sound insulating panel in the soundproof wall shown in FIG. 1. It is a fragmentary sectional view of the soundproof wall explaining an example of mechanical joining which is one embodiment of the present invention. It is a fragmentary sectional view of the soundproof wall explaining other examples of mechanical joining which is one embodiment of the present invention.

  The soundproof wall of the present invention is used for noise countermeasures on railways, highways, ordinary roads, medium- and high-rise buildings, etc., and is particularly suitable for railways that require a short construction period.

  The soundproof wall of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of a soundproof wall according to one aspect of the present invention as viewed from the noise source side, and FIG. 2 is a perspective view of the soundproof wall according to one aspect of the present invention as viewed from the opposite direction to the noise source. is there.

  As shown in FIG. 1, the soundproof wall 1 of the present invention has a configuration of an FRP soundproof wall 3 and a sound absorbing panel 2 installed on the noise source side. In addition, as shown in FIG. 2, the soundproof wall 1 of the present invention can be configured so that the soundproof walls 1 are seamlessly connected in consideration of aesthetics.

  In general, it is important that the soundproof wall 1 is designed so that the FRP soundproof wall 3 itself does not break and the soundproof wall 1 is stable so as to withstand wind loads. From this point of view, the FRP sound insulation wall 3 basically has an upright FRP sound insulation panel 11 and an attachment portion 12 provided with a fixing through hole 13 that can be attached to a building frame.

  For the FRP sound insulation panel 11, if the strength of the FRP sound insulation panel 11 is sufficient for the required wind load, only the FRP sound insulation panel 11 may be sufficient, but if the strength is not satisfied only by the FRP sound insulation panel 11, An appropriate number of reinforcing stiffeners 14 are vertically installed on the FRP sound insulation panel 11, and at least one surface of the reinforcing stiffener 14 and the mounting portion 12 are rigidly connected.

  The mounting portion 12 is installed so as to be horizontal at the base of the FRP sound insulation panel 11 so that the mounting portion 12 does not fall over or slide with respect to a bending moment or horizontal force generated by the wind load. The depth of the mounting portion 12 is 2 to 20% of the height of the FRP sound insulation panel 11, and an anchor bolt is used to fix the FRP sound insulation wall 3 to the building frame 30. A through hole 13 is provided so that a fastener such as can be inserted.

  Examples of the material of the mounting portion 12 and the reinforcing stiffener 14 include FRP, steel, wood, plastic, and the like, but considering the integrity with the FRP sound insulation panel 11, aesthetics, lightness, high strength, and economy, The entire surface of the FRP sound insulation wall including the attachment portion 12 and the reinforcing stiffener 14 is preferably an FRP layer.

Further, the weight of the FRP sound insulation wall 3 greatly affects the workability. Therefore, in order to reduce the weight of the FRP sound insulation wall 3, the weight per unit area of the FRP sound insulation panel 11 is preferably 20 kg / m ² or less.

  The sound absorbing panel in the present invention has a metal perforated plate and a sound absorbing material, and is arranged so that the noise source side of the sound insulation wall is a metal perforated plate. As this metallic perforated plate, a plate punched in a circular shape on aluminum or a highly corrosion-resistant plated steel plate, or a plate opened on a rhombus by expanding a steel material is preferably used. It is preferable to provide a frame for attaching to the sound insulation wall at the end of the metal perforated plate. Such a frame may be formed of the same material as the metal perforated plate and integrated with the metal perforated plate.

  The sound absorbing panel usually includes a metal perforated plate disposed on the noise source side and a sound absorbing material disposed on the sound insulating panel side.

  As a sound absorbing panel that can be obtained relatively easily in the market, as shown in FIG. 3, the A type (hereinafter referred to as the metal sound insulating plate 24, the metal perforated plate 21, the sound absorbing material 22, the air layer 23, from the noise source side). There are A type sound absorbing panel 2a) and B type (hereinafter referred to as B type sound absorbing panel 2b) comprising metal perforated plate 21 and sound absorbing material 22 from the noise source side as shown in FIG. That is, when the A-type sound absorbing panel 2 a is used in the present invention, the sound insulating panel 11 side has the metal sound insulating plate 24, and the metal sound insulating plate 24 and the sound absorbing material 22 have the air layer 23. become. In the case of the A-type sound absorbing panel 2a, the metal shielding plate 24 and the FRP sound-insulating panel 11 may be installed so as to be in direct contact with each other, but in the case of the B-type sound absorbing panel 2b, the sound absorbing panel is used to absorb low-frequency noise. An air layer is provided between 2 and the FRP sound insulation panel 11.

  Generally, the top position of the sound absorbing panel is set so that it is at or below the top end position of the FRP sound insulation wall, but when the A type sound absorption panel is used, the top position of the FRP sound insulation wall should be exceeded. However, when a B-type sound absorbing panel is used, it is installed so that it is below the top end position of the FRP sound insulation wall. Glass wool, polyester fiber, aluminum fiber, aluminum porous board, rock wool are preferably used because the type of sound absorbing material in the sound absorbing panel is installed outdoors. However, considering economics, glass wool or polyester fiber is used. More preferably it is used.

  Next, attachment of the sound absorbing panel to the FRP sound insulating wall will be described. FIG. 5 is a cross-sectional view in a horizontal plane when the A-type sound absorbing panel 2 a is fixed to the reinforcing stiffener 14 of the FRP sound insulating wall 3. FIG. 6 is a cross-sectional view in a horizontal plane when the A-type sound absorbing panel 2 a is fixed to the FRP sound insulating panel 11 of the FRP sound insulating wall 3.

  When the FRP sound insulation panel 11 has the reinforcing stiffener 14, as shown in FIG. 5, the mounting stay fixed to the metal frame of the sound absorbing panel 2 is connected with a connecting member 15 embedded in the reinforcing stiffener 14 and a bolt or the like. Connect and fix. The embedded connecting member 15 may use a nut, a steel plate with bolt holes, or the like, and preferably uses a flat plate with bolt holes in consideration of stress concentration relaxation. As an example of such a connecting member, an embedded nut 17 in a reinforcing stiffener connected by a bolt 16 as shown in FIG. 7 or an embedded bolt in a reinforcing stiffener connected by a nut 18 as shown in FIG. There are nineteen.

  Moreover, as a material of a volt | bolt and the connection member 15, although stainless steel, SS steel material, SM steel material etc. are mentioned, it is preferable to use stainless steel from corrosion resistance. In FIG. 5, the A type sound absorbing panel 2a is used as the sound absorbing panel 2. However, instead of the A type sound absorbing panel 2a, a B type sound absorbing panel is also attached so as to form an air layer between the sound absorbing panel and the sound insulating panel. be able to. When the B-type sound absorbing panel 2b is installed, the thickness of the air layer of the sound absorbing panel and the FRP sound insulating panel is preferably 20 mm or more, and more preferably 40 mm or more from the viewpoint of low frequency noise absorption.

  On the other hand, as shown in FIG. 6, when directly attaching the sound absorbing panel 2 to the FRP sound insulating panel 11, an attachment stay fixed to the metal frame of the sound absorbing panel is connected to the connecting member 15 embedded in the FRP sound insulating panel 11. Connect and fix with bolts. In this case, it is preferable to attach the A-type sound absorbing panel 2a as the sound absorbing panel 2 in consideration of low frequency noise absorbability. In addition, as a volt | bolt and a connection member, the thing similar to what was demonstrated in the said FIG. 5 can be used.

  Thus, by attaching with a volt | bolt or a connection member, a sound absorption panel is mechanically joined to the sound insulation wall made from FRP, and a sound absorption panel can be made detachable from the sound insulation wall made from FRP.

  Next, the construction method of the soundproof wall of this invention is demonstrated. In the present invention, an FRP sound insulation panel and a mounting portion having a depth of 2 to 20% of the height of the sound insulation panel and provided with a fixing through-hole that can be attached to the building housing are provided on the building housing. The sound insulation wall made of FRP is installed, and then the sound absorption panel is installed on the noise source side of the sound insulation wall. More specifically, the following is performed. In FIG. 1, the anchor bolt previously installed in the building housing 30 is inserted into the through-hole 13 provided in the mounting portion 12 of the FRP sound insulation wall 3, and the FRP sound insulation wall 3 is first fixed by tightening the nut. Thereafter, the metal perforated plate 21 of the sound absorbing panel 2 is oriented so as to be on the noise source side, and the connecting member 15 embedded in the metal frame stay of the sound absorbing panel 2 and the reinforcing stiffener 14 or the FRP sound insulating panel 11. Are fixed to each other and tightened with bolts or the like to fix the sound absorbing panel 2 and the installation of the soundproof wall 1 is completed.

  Finally, a case where the sound absorbing panel is updated will be described. According to the soundproof wall of the present invention, the FRP sound insulating wall and the sound absorbing panel are not completely integrated, and the sound absorbing panel is connected to the reinforcing stiffener 14 or the FRP sound insulating panel 11 with bolts and the like. The structure is connected to the FRP sound insulation wall. In other words, when the sound absorbing panel is renewed for the purpose of upgrading or repairing the sound absorbing material after installing the sound insulating wall, it is not necessary to remove the FRP sound insulating wall from the building frame. Can be replaced.

  According to the present invention as described above, the sound insulation performance can be greatly improved by attaching the sound absorption panel having the sound absorption performance to the noise source side of the FRP sound insulation wall, as well as the FRP sound insulation wall and the sound absorption panel. Can be installed separately, the weight of the soundproof wall during construction is not increased, the FRP sound insulation wall can be easily installed, and good workability can be secured. In addition, when the sound absorbing material is updated, it is possible to replace only the sound absorbing panel without removing the sound insulating wall compared to the conventional method of removing and replacing the sound insulating wall itself, so that the replacement work can be performed with the sound insulating effect, and In addition, the sound insulation performance can be improved and maintained by repairing the sound absorbing panel at a low cost and with a shorter construction period.

DESCRIPTION OF SYMBOLS 1 Sound insulation wall 2 Sound absorption panel 2a A type sound absorption panel 2b B type sound absorption panel 3 FRP sound insulation wall 11 FRP sound insulation panel 12 Mounting part 13 Through hole 14 Reinforcement stiffener 15 Connecting member 16 Bolt 17 Embedded nut 18 Nut 19 Embedded bolt 21 Metal Perforated plate 22 Sound absorbing material 23 Air layer 24 Metal sound insulating plate 30 Building frame

Claims (8)

Noise of an FRP sound insulation wall composed of an FRP sound insulation panel and a mounting portion having a depth of 2 to 20% of the height of the sound insulation panel and provided with a fixing through hole that can be attached to a building frame A soundproof wall characterized in that a sound absorbing panel is installed on the source side. The soundproof wall according to claim 1, wherein the sound absorbing panel includes a metal perforated plate disposed on a noise source side and a sound absorbing material disposed on the sound insulating panel side. The soundproof wall according to claim 2, wherein the sound absorbing panel has a metal sound insulating plate on the sound insulating panel side, and an air layer is provided between the sound insulating plate and the sound absorbing material. The soundproof wall according to any one of claims 1 to 3, wherein an air layer is provided between the sound absorbing panel and the sound insulating panel. The soundproof wall according to any one of claims 2 to 4, wherein the perforated plate has a frame to be attached to the sound insulating wall. The soundproof wall according to any one of claims 1 to 5, wherein the sound absorbing panel is detachably installed from the sound insulating wall. The soundproof wall according to any one of claims 1 to 6, wherein the sound absorbing panel is mechanically joined to the sound insulating wall. The building frame is composed of an FRP sound insulation panel and a mounting portion having a depth of 2 to 20% of the height of the sound insulation panel and provided with a fixing through-hole that can be attached to the building frame. A method for constructing a soundproof wall, comprising installing a sound insulating wall made of FRP and then installing a sound absorbing panel on a noise source side of the sound insulating wall.

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