Underground wall vibration isolation structure of building

Abstract

To provide an underground wall vibration isolation structure of a building which can reliably and easily fix a foamed resin plate, in the case where a vibration isolation layer comprising the foamed resin plate is interposed between an underground wall and an earth retaining wall of a building.SOLUTION: An underground wall vibration isolation structure of a building comprises: a plate-like member 22 placed being stretched to corners of foamed resin plates 21 arranged side by side vertically and horizontally inside an earth retaining wall 3, being abutted to each other; a fixing tool penetrating the plate-like member 22 and the foamed resin plate 21, for fixing the plate-like member 22 and the foamed resin plate 21 to the earth retaining wall 3; and an elastic member 23 for covering the entire surface of the plate-like member 22.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an underground wall vibration isolation structure of a building adjacent to a vibration source such as a railway or road, particularly a subway. [Background technology]

[0002] Conventionally, when constructing a structure, a retaining wall is formed in the ground using soil concrete, and an underground wall is formed inside the retaining wall as the foundation of the structure, adjacent to the retaining wall.

[0003] However, in the case of buildings adjacent to vibration sources such as railways and roads, and especially subways, vibrations from the vibration sources can be transmitted to the underground walls of the building via retaining walls, causing problems such as low-frequency sound (vibrations that cannot be heard by the ears but can be felt by the body) inside the building.

[0004] To address this problem, it has been proposed and put into practical use to interpose a vibration isolation layer 2 made of a foamed resin plate between the underground wall 11 and the retaining wall 3 of a building 1, as shown in Figure 5 (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 6-173288 Summary of the Invention [Problem to be solved by the invention]

[0006] When a vibration-isolating layer 2 made of a foamed resin plate is interposed between the underground wall 11 of the structure 1 and the retaining wall 3, the retaining wall 3 is formed from soil concrete in the ground 4, the vibration-isolating layer 2 made of a foamed resin plate is placed inside the retaining wall 3 and a formwork (not shown) is placed on the inside of the vibration-isolating layer 2 with a space between them, and concrete is poured between the vibration-isolating layer 2 and the formwork to form the underground wall 11 as the foundation of the structure 1.

[0007] The foamed resin plate used for the vibration isolation layer 2 is usually a square with each side measuring approximately 1000 mm (e.g. 900 x 1200 mm) and having a thickness of 25 to 200 mm, but when placing the foamed resin plate on the inside of the retaining wall 3, a method is used in which the foamed resin plates are arranged side by side vertically and horizontally, butted together, and fixed with adhesive tape. This method of fixing the foamed resin plate has the advantage of simplifying the work, but it has the disadvantage that the fixing state is not stable and the foamed resin plate becomes easily separated over time. However, fixing all the foamed resin plates using the separators disclosed in Patent Document 1 is difficult in terms of workability and the like.

[0008] The present invention aims to provide a vibration-proof structure for an underground wall of a building, which enables a foamed resin plate to be fixed reliably and easily when a vibration-isolating layer made of a foamed resin plate is interposed between the underground wall and an earth retaining wall of the building. [Means for solving the problem]

[0009] In order to achieve the above object, the basement wall vibration isolation structure of the present invention is a structure in which a vibration isolating layer made of a foamed resin plate is interposed between the basement wall and the earth retaining wall of the building, the basement wall vibration isolation structure of the present invention is structured such that a plate-like member is placed across the corners of the foamed resin plates that are arranged side by side vertically and horizontally on the inside of the earth retaining wall and butt against each other, and ... It is characterized by comprising a fastener for fixing the grease plate to the retaining wall and an elastic member covering the entire surface of the plate-shaped member.

[0010] In this case, the plate-like member may be provided with a recess for absorbing the protrusion of the head of the fixing tool.

[0011] The elastic member may also be provided with a peripheral ridge having a thickness equal to or greater than the thickness of the plate-like member. Effect of the Invention

[0012] According to the underground wall vibration-proof structure of the present invention, the plate-shaped member and the foamed resin plate are fixed to the retaining wall by fasteners that penetrate the plate-shaped member and the foamed resin plate via a plate-shaped member placed across the corners of the foamed resin plates that are arranged side by side vertically and horizontally on the inside of the earth-retaining wall, and the foamed resin plate is then fixed to the earth-retaining wall by covering the entire surface of the plate-shaped member with an elastic member, thereby ensuring reliable and easy fixing of the foamed resin plate and preventing the foamed resin plate from coming off or floating, and interposing a vibration-isolating layer made of a foamed resin plate between the underground wall and the earth-retaining wall of the structure, in a state that blocks the transmission of vibrations from the earth-retaining wall side. [Brief description of the drawings]

[0013] [Figure 1] 1 is an explanatory diagram showing an embodiment of an underground wall vibration isolation structure for a building according to the present invention. FIG. [Diagram 2] FIG. 1 is an explanatory diagram showing the plate-shaped member and the elastic member used in the vibration-proof structure of the underground wall of the same building, where (a) is a perspective view of the plate-shaped member, (b) is a perspective view of the elastic member, (c) is an explanatory diagram showing the plate-shaped member covered with the elastic member, (d) is an AA cross-sectional view of (c), and (e) is an enlarged view of part B of (d). [Diagram 3] 1A is an explanatory diagram showing a plate-shaped member used in the vibration-proof structure of the underground wall of the same building, where (a) is a perspective view, (b) is a front view, and (c) is a bottom view. [Figure 4] FIG. 1 is an explanatory diagram showing an elastic member used in the vibration-proof structure of an underground wall of the same building, where (a) is a perspective view, (b) is a front view, (c) is a bottom view, and (d) is a cross-sectional view taken along the line AA of (c). [Diagram 5] FIG. 1 is an explanatory diagram showing a conventional vibration isolation structure for an underground wall of a building. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the vibration isolation structure for an underground wall of a building according to the present invention will be described with reference to the drawings.

[0015] 1 to 4 show an embodiment of a vibration isolation structure for an underground wall of a building according to the present invention. The basement wall vibration isolation structure of this building is similar to the basement wall vibration isolation structure of the conventional building shown in Figure 5, in that a retaining wall 3 is formed from soil concrete in the ground 4, a vibration isolation layer 2 made of a foamed resin plate 21 is placed on the inside of the retaining wall 3 and a formwork (not shown) is placed at a distance on the inside of the layer, and concrete is poured between the vibration isolation layer 2 and the formwork to form an basement wall 11 as the foundation of the building 1.

[0016] The vibration isolation layer 2 of the underground wall vibration-proof structure of this building consists of plate-shaped members 22 placed across the corners of foamed resin plates 21 arranged side by side vertically and horizontally on the inside of the earth-retaining wall 3, fasteners (not shown) that penetrate the plate-shaped members 22 and the foamed resin plates 21 to fix the plate-shaped members 22 and the foamed resin plates 21 to the earth-retaining wall 3, and an elastic member 23 that covers the entire surface of the plate-shaped members 22.

[0017] The foamed resin plate 21 is made of foamed resin made of polyolefin resin such as polyethylene or polypropylene, or polystyrene resin, and is a square with each side measuring about 1000 mm (for example, 900×1200 mm) and a thickness of 25 to 200 mm.

[0018] The plate-like member 22 is made of a metal plate such as a steel plate, an aluminum plate, or a stainless steel plate, or a hard synthetic resin plate, and can be a square with one side measuring about 200 to 400 mm (for example, 290 x 290 mm) and a thickness of about 1 to 2 mm. Furthermore, the shape of the plate-like member 22 is not limited to square, and any shape such as circular, cross, etc. can be used as long as it can be placed across the corners of the foamed resin plates 21 arranged side by side vertically and horizontally and butted together, thereby fixing the corners of each foamed resin plate 21 flush with the surface of the retaining wall 3. In addition, a recess 22a is provided to absorb the protrusion of the head of a fastener (for example, a nail or a screw).

[0019] The elastic member 23 is made of an elastic body such as chloroprene rubber (CR) or natural rubber (NR), and can be one size larger than the plate-like member 22 (for example, a square of 300 x 300 mm) and with a thickness of about 2 to 5 mm so that it can cover the entire surface of the plate-like member 22. Here, it is preferable that the elastic member 23 has a peripheral protrusion 23 a that is equal to or greater than the thickness of the plate-like member 22 . Moreover, the plate-like member 22 and the elastic member 23 can be fixed together using an adhesive, a double-sided adhesive tape, or the like. This makes it possible to stably maintain the state in which the plate-like member 22 is covered with the elastic member 23.

[0020] According to the underground wall vibration-proof structure of this building, the plate-shaped member 22 and the foamed resin plate 21 are fixed to the earth-retaining wall 3 by a fastener penetrating the plate-shaped member 22 and the foamed resin plate 21 via a plate-shaped member 22 arranged across the corners of the foamed resin plates 21 arranged in a row vertically and horizontally on the inside of the earth-retaining wall 3 and butted together, and the entire surface of the plate-shaped member 22 is then covered by an elastic member 23, thereby enabling the foamed resin plate 21 to be fixed reliably and easily, and a vibration-isolating layer 2 consisting of the foamed resin plate 21 can be interposed between the underground wall 11 and the earth-retaining wall 3 of the building 1 while preventing the foamed resin plate 21 from coming off or floating, in a state in which the transmission of vibrations from the earth-retaining wall side is blocked (vibrations transmitted from the earth-retaining wall side via the fasteners and the plate-shaped member 22 are blocked by the elastic member 23).

[0021] The above describes the underground wall vibration isolation structure of a building of the present invention based on its embodiment, but the present invention is not limited to the configuration described in the above embodiment, and the configuration can be changed as appropriate within the scope of the spirit of the present invention. [Industrial Applicability]

[0022] The vibration-proof structure for underground walls of buildings of the present invention can reliably and easily fix the foamed resin plate when a vibration-isolating layer made of a foamed resin plate is interposed between the underground wall of the building and the retaining wall, and therefore can be suitably used as a vibration-proof structure for underground walls of buildings that are in contact with vibration sources such as railways and roads, and especially subways. [Explanation of symbols]

[0023] 1 building 11 Underground wall 2. Vibration isolation layer 21 Foam resin board 22 Plate-shaped member 22a Recess 23 Elastic member 23a Peripheral ridge 3. Earth retaining wall 4 Ground

Claims

1. This underground wall vibration-proof structure for a building has a vibration-isolating layer made of a foamed resin plate interposed between the underground wall and the earth-retaining wall of the building, and is characterized in that it comprises a plate-shaped member placed across the corners of the foamed resin plates that are arranged side by side vertically and horizontally on the inside of the earth-retaining wall, fasteners that penetrate the plate-shaped member and the foamed resin plate and fix the plate-shaped member and the foamed resin plate to the earth-retaining wall, and an elastic member that covers the entire surface of the plate-shaped member.

2. 2. The vibration isolation structure for an underground wall of a building according to claim 1, wherein the plate-like member has a recess for absorbing the protrusion of the head of the fixing device.

3. 3. The vibration isolation structure for an underground wall of a building according to claim 1, wherein the elastic member has a peripheral protrusion having a thickness equal to or greater than the thickness of the plate-like member.

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