Vibration isolation structure for basement walls of buildings

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 for a building that is in contact with a vibration source such as a railway or road, particularly a subway. [Background technology]

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

[0003] However, in the case of buildings adjacent to vibration sources such as railways, roads, and especially subways, vibrations from the vibration sources are transmitted to the building's underground walls via retaining walls, causing problems such as low-frequency sounds (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-insulating layer 2 made of a foamed resin plate between the basement wall 11 of a building 1 and the retaining wall 3, 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-insulating 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 using soil concrete in the ground 4, the vibration-insulating layer 2 made of a foamed resin plate is placed inside the retaining wall 3, and formwork (not shown) is placed inside it at a distance, and concrete is poured between the vibration-insulating layer 2 and the formwork to form the underground wall 11 as the foundation of the structure 1.

[0007] The foamed resin boards used for the vibration-insulating layer 2 are usually square, with sides of approximately 1000 mm (for example, 900 x 1200 mm), and 25 to 200 mm thick. When placing foamed resin boards inside the retaining wall 3, the foamed resin boards 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-isolating structure for an underground wall of a building that allows for secure and easy fixing of a foamed resin plate when a vibration-isolating layer made of a foamed resin plate is interposed between the underground wall and the earth retaining wall of the building. [Means for solving the problem]

[0009] In order to achieve the above object, the vibration isolation structure for basement walls of a building of the present invention is a structure in which a vibration isolation layer made of a foam resin plate is interposed between the basement wall of the building and the earth retaining wall, and the vibration isolation structure for basement walls of a building of the present invention is structured such that a vibration isolation layer made of a foam resin plate is interposed between the basement wall of the building and the earth retaining wall, and the structure comprises plate-like members arranged across the corners of the foam resin plates arranged side by side and butted against each other inside the earth retaining wall, and a pair of plates and foam resin plates passing through the plate-like members and the foam resin plate. It is characterized by comprising a fixing device for fixing the grease plate to the retaining wall and an elastic member that covers 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. [Effects of the Invention]

[0012] According to the underground wall vibration-proof structure of the present invention, the plate-like members and the foamed resin plates are fixed to the retaining wall using fixing devices that penetrate the plate-like members and the foamed resin plates, which are arranged side by side vertically and horizontally on the inside of the retaining wall and butt together.Then, the entire surface of the plate-like members is covered with an elastic member, thereby reliably and easily fixing the foamed resin plates, preventing the foamed resin plates from coming off or floating, and interposing a vibration-insulating layer made of foamed resin plates between the underground wall and the retaining wall of the building, while blocking the transmission of vibrations from the retaining wall side. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is an explanatory diagram showing an embodiment of the vibration isolation structure for an underground wall of a building according to the present invention. [Figure 2] The figures are explanatory diagrams showing the plate-shaped members and elastic members used in the vibration isolation 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). [Figure 3] 1A, 1B, and 1C are explanatory diagrams showing the plate-shaped members used in the vibration isolation structure of the underground wall of the same building, in which (a) is a perspective view, (b) is a front view, and (c) is a bottom view. [Figure 4] An explanatory diagram showing the elastic member used in the vibration isolation structure of the 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). [Figure 5] FIG. 1 is an explanatory diagram showing a conventional vibration isolation structure for an underground wall of a building. DETAILED DESCRIPTION OF THE INVENTION

[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 the vibration isolation structure for basement walls 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 in the ground 4 using soil concrete, a vibration isolation layer 2 made of foam resin board 21 is installed inside the retaining wall 3, and formwork (not shown) is installed at intervals inside the layer 2, 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-isolating layer 2 of the underground wall vibration-proof structure of this building consists of plate-like members 22 placed across the corners of foamed resin plates 21 arranged side by side vertically and horizontally on the inside of the retaining wall 3, fixing devices (not shown) that penetrate the plate-like members 22 and the foamed resin plates 21 and fix the plate-like members 22 and the foamed resin plates 21 to the retaining wall 3, and elastic members 23 that cover the entire surface of the plate-like 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 a side of about 1000 mm (for example, 900×1200 mm) and a thickness of 25 to 200 mm.

[0018] The plate-like member 22 can be 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 a side measuring approximately 200 to 400 mm (for example, 290 x 290 mm) and a thickness of approximately 1 to 2 mm. The shape of the plate-like member 22 is not limited to a square, and any shape such as a circle or a cross 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, so that the corners of each foamed resin plate 21 can be fixed flush with the surface of the retaining wall 3. In addition, recesses 22a are provided to absorb the protrusions of the heads of fasteners (for example, nails or screws).

[0019] The elastic member 23 is made of an elastic material 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 approximately 2 to 5 mm thick so as to cover the entire surface of the plate-like member 22. Here, it is preferable that the elastic member 23 has a peripheral ridge 23 a that is equal to or greater than the thickness of the plate-like member 22 . The plate-like member 22 and the elastic member 23 can be fixed together using an adhesive, 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-like members 22 and the foamed resin plates 21 are fixed to the retaining wall 3 using fixing devices that penetrate the plate-like members 22 and the foamed resin plates 21 via plate-like members 22 that are placed across the corners of the foamed resin plates 21 that are arranged side by side vertically and horizontally on the inside of the retaining wall 3, and then the entire surface of the plate-like members 22 is covered with elastic members 23, thereby ensuring reliable and easy fixing of the foamed resin plates 21 and preventing the foamed resin plates 21 from coming off or floating, and allowing a vibration-insulating layer 2 consisting of the foamed resin plates 21 to be interposed between the underground wall 11 and the retaining wall 3 of the building 1 in a state where the transmission of vibrations from the retaining wall side is blocked (vibrations transmitted from the retaining wall side via the fixing devices and the plate-like members 22 are blocked by the elastic members 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-isolating structure for underground walls of buildings of the present invention can reliably and easily fix a vibration-insulating layer made of a foamed resin plate between the underground wall of the building and the retaining wall, and therefore can be suitably used as a vibration-isolating structure for underground walls of buildings that are in contact with vibration sources such as railways and roads, 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 vibration-proof structure for the basement wall of a building has a vibration-insulating layer made of a foam resin plate interposed between the basement wall and the earth-retaining wall of the building, and is characterized by comprising: a plate-shaped member that is placed across the corners of four foam resin plates that are arranged side by side vertically and horizontally on the inside of the earth-retaining wall, so as to cover part of the surface of each foam resin plate; a fixing device that penetrates the plate-shaped member and the foam resin plate and fixes the plate-shaped member and the foam 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 peripheral ridges having a thickness equal to or greater than the thickness of the plate-like member.

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