JP3154303B2 - Anti-vibration basement wall structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration underground wall structure, and more particularly to an anti-vibration underground wall structure for reducing vibration and vibration noise of railways, roads, etc., which travel on the ground and affect buildings.

[0002]

2. Description of the Related Art Conventionally, in a building approaching a railway track, vibrations generated in the track enter the building through the ground, and the vibration itself and solid-borne noise radiated from interior materials adversely affect occupants. I will. Therefore, in a building approaching a railway track, various devices have been devised in order to reduce vibration, solid-borne noise, and the like.

[0003] For example, as a main method for reducing traffic vibrations and the like in an underground part of a building, a method using an empty groove, insertion of a cushioning material, an anti-vibration mountain retaining wall and the like can be mentioned. In the above-described reduction method using the empty groove, a space is provided between the ground and the building by a mountain retaining wall or a retaining wall, and the degree of ground vibration propagation to the building is reduced. In this reduction method, the mountain retaining wall and the retaining wall are supported independently from the ground using a permanent anchor or the like, thereby independently supporting the mountain retaining wall and the retaining wall subjected to the earth pressure.

[0004] The above-mentioned reduction method by inserting a cushioning material involves inserting a cushioning material such as styrene foam between the ground and an underground wall of a building, and using the cushioning material to control the degree of ground vibration propagation to the building. It is to reduce. In addition, the above-mentioned reduction method using the anti-vibration mountain retaining wall is described in, for example, Japanese Patent Publication No. Sho 60-2.
As disclosed in Japanese Patent No. 461, a mountain retaining wall is constructed sufficiently deeper than a building frame, vibrations and vibration sounds are cut off with a space between the mountain retaining wall and the building frame, and An anti-vibration mountain buckle in which a vibration isolator made of a rubber anti-vibration capable of withstanding such earth pressure and providing desired vibration-proof and sound-proof properties is interposed at several levels at the height of the slab or the beam of the building frame. The wall is introduced.

[0005]

However, according to the above-mentioned method of reducing the number of gaps, it is usually necessary to install an anchor for independently supporting a retaining wall or a retaining wall on a track or a public road site. Hardly ever.
Therefore, there is a problem that it is not realistic to provide a trench between the ground and the basement wall of the building.

[0006] In addition, the above-mentioned reduction method by inserting a cushioning material is characterized in that a cushioning material having hardness enough to withstand the earth pressure is inserted.
50-70Hz which is problematic in subway vibration and solid-borne sound
There is a problem that a sufficient reduction effect cannot be expected with respect to the vibration of. And the above-mentioned Tokiko Sho 60-2
The conventional example disclosed in Japanese Patent No. 461 does not have a mechanism for adjusting the difference in the compressive force applied to the vibration isolators before and after removal of the girder supporting the retaining wall during construction.
There is a problem that a compressive force for obtaining a required vibration-proof effect cannot be applied to the vibration-proof device. In addition, it is difficult to put the retaining wall at an appropriate position, and the retaining wall moves toward the building due to earth pressure, so that there is a problem that the track construction may be deformed.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and it does not deform the track construction and transmits vibrations and vibration noises of railways and roads which affect the building by transmitting along the ground. It is an object of the present invention to provide an anti-vibration underground wall structure that reduces the noise.

[0008]

In order to achieve this object, the present invention provides a retaining wall provided between a retaining wall and a building frame with a gap between the retaining wall and the building frame; Backfill soil filled in the gap formed by, and a plurality of vibration isolators installed between the side of the retaining wall and the side of the building frame,
The anti-vibration device has a structure in which an anti-vibration member is installed at one axial end of a support member whose axial length can be adjusted, and the other side in the axial direction of the support member is provided on the one side surface. The end,
Another object of the present invention is to provide an anti-vibration basement wall structure in which the anti-vibration member is installed on the other side surface.

[0009]

According to the present invention, the anti-vibration device interposed between the retaining wall and the building frame has a structure in which the anti-vibration member is provided with a support member whose axial length can be adjusted. Before removing the girder in the construction of the anti-vibration basement wall, the length of the support member can be adjusted, and the compressive force applied when removing the girder can be applied to the vibration isolator in advance. Therefore, since it is possible to adjust the difference in the compressive force applied to the vibration isolator before and after the removal of the girder, it is possible to prevent the retaining wall from being deformed or moved by the earth pressure, and to provide the vibration isolator with , A compressive force necessary to obtain a sufficient vibration isolation effect can be applied. Furthermore, by using the backfill soil filled between the retaining wall and the retaining wall as a cushioning material, vibration and solid-borne noise can be absorbed also at this portion. Therefore, it is possible to reduce the degree to which vibration, solid-borne noise, and the like that propagate through the ground and affect the building propagate through the building.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an anti-vibration basement wall structure according to an embodiment of the present invention, and FIG. 2 is an enlarged front view of an anti-vibration device used for the anti-vibration basement wall structure shown in FIG. The anti-vibration basement wall structure 20 shown in FIG. 1 and FIG. 2 includes a mountain retaining wall 8 between a ground 21 and a building frame 2 in order from the ground 21 side.
Sheet piles 7 are provided continuously. Then, the retaining wall 1 is installed with a gap from the sheet pile 7, and between the sheet pile 7 and the retaining wall 1,
The backfill soil 6 is filled. Further, on the side surface of the building frame 2 on the ground 21 side, a disposal form 5 forming a part of the building frame 2 is installed. Further, between the side surface of the retaining wall 1 and the side surface of the waste form 5, a plurality of anti-vibration devices 3 described later are provided. Reference numeral 4 denotes a water-stopping member for preventing water from entering between the retaining wall 2 and the building frame 2 on which the disposal form 5 is installed.

As shown in FIG. 2, the anti-vibration device 3 includes a full screw bolt 13 and a full screw bolt 1 that are mutually reverse-threaded.
4 is screwed to both ends of the long nut 15 to form a support member 21. The outer end of the full screw bolt 14 of the support member 21 is provided between the plates 12 and 19 which are kept parallel to each other. The structure has a structure in which the vibration isolating member 22 with the interposition 16 is fixed and the plate 11 is fixed to the other end of the full screw bolt 13. The anti-vibration member 22 is such that the plate 12 is perpendicular to the axial direction of the support member 21,
Further, the plate 11 is installed so as to be perpendicular to the axial direction of the support member 21. The support member 21 is designed so that the length in the axial direction can be adjusted by rotating the long nut 15 in a predetermined direction.
Further, on the plate 19, two bolts 17 and 18 are installed so as to be perpendicular to the plate 19. The bolts 17 and 18 of the vibration isolator 3 are connected to the side surface of the retaining wall 1 and the plate 11
Are connected to the disposal form 5.

Next, a method of constructing the anti-vibration underground wall structure 20 will be described. FIG. 3 to FIG. 6 are cross-sectional views showing a part of the construction process of the anti-vibration underground wall structure 20 according to the present embodiment. In the process shown in FIG. 3, the sheet pile 7 is installed with a gap between the ground 21 that is in a rooted state to the third basement floor (B3F), and the mountain retaining wall 8 is installed between the ground 21 and the sheet pile 7. The cutting beam 23 was installed at a predetermined position of the sheet pile 7.

Next, in the step shown in FIG. 4, the retaining wall 1 is moved to a position on the second basement floor (B2F) below the lowest cutting beam 23.
To fill the backfill soil 6 between the retaining wall 1 and the sheet pile 7. Then, after installing the water blocking member 4 at the lowermost side surface of the retaining wall 1 on the building skeleton side, the bolts 17 and 18 of the vibration isolator 3 are fixed to predetermined positions of the retaining wall 1,
The vibration isolator 3 is installed. Next, on the plate 11 of the anti-vibration device 3 installed on the retaining wall 1, the disposal formwork 5 for building the building frame 2 is installed.

Next, in the step shown in FIG. 5, after the building frame 2 is cast using the waste form 5, the retaining wall 1 is deformed and moved by the earth pressure applied when the cutting beams 23 are removed later. The axial length of the support member 21 of the vibration isolator 3 is adjusted for the purpose of applying a compressive force necessary to prevent the vibration damping from occurring. As a result, the earth pressure applied to the retaining wall 1 is supported by the waste form 5 via the vibration isolator 3 instead of the cut beam 23. Thereafter, the cutting beams 23 are removed.

Next, in the step shown in FIG. 6, the first basement (B
1F), the backfill soil 6 is filled between the retaining wall 1 and the sheet pile 7, and then the bolts 17 and 18 of the vibration isolator 3 are placed at predetermined positions on the retaining wall 1. After fixing, the vibration isolator 3 is installed. Next, on the plate 11 of the vibration isolator 3 installed on the retaining wall 1, the disposable formwork 5 for constructing the building frame 2 is placed.
Is installed.

Thereafter, the same operation as described above is repeated,
The anti-vibration underground wall structure 20 shown in FIG. 1 is completed. Next, the anti-vibration underground wall structure 20 according to the present embodiment is adopted in a building approaching a subway, and an octave band vibration acceleration level having a center frequency of 8 to 500 Hz is applied to a retaining wall on the subway side and a first floor beam on the building side. (DB) was investigated. The result is shown in FIG.

FIG. 7 shows that the first-floor beam on the building side has a vibration reduction effect of about 20 dB compared to the retaining wall on the subway side at 50 to 70 Hz, which is a problem due to subway vibration and solid-borne sound. The result was proved. The anti-vibration device 3 described in the present embodiment has a support member 21 having a structure in which all screw bolts 13 and 14 are connected via a long nut 15.
By turning the long nut 15 in a predetermined direction using
Although the length of the support member 21 was adjusted, the invention is not limited thereto, and a support member 21 having another structure may be used as long as the length in the axial direction can be adjusted.

In this embodiment, the bolts 17 and 18 are used.
Was set on the retaining wall 1 and the plate 11 was set on the formwork 5,
Alternatively, the plate 11 may be installed on the retaining wall 1 and the bolts 17 and 18 may be installed on the discarding formwork 5. The installation location, the installation number, the installation method, and the like of the vibration isolator 3 may be arbitrarily determined.

[0019]

As described above, the anti-vibration device interposed between the retaining wall and the building frame has a structure in which the axially adjustable support member is installed on the anti-vibration member. Therefore, the length of the support member can be adjusted before removing the girder in the construction of the vibration-proof basement wall, and the compressive force applied at the time of removing the girder can be applied to the vibration-isolating device in advance. Therefore,
It is possible to adjust the difference in compressive force applied to the anti-vibration device before and after removal of the girder, thereby preventing the retaining wall from being deformed and moving due to earth pressure, and providing sufficient anti-vibration to the anti-vibration device. It is possible to apply a compressive force to obtain an effect. Further, by using the backfill soil filled between the retaining wall and the retaining wall as a cushioning material, vibration, solid-borne noise, and the like can be absorbed also in this portion. As a result, it is possible to reduce the degree of propagation of vibration, solid-borne noise, and the like that propagate through the ground and affect the building without deforming the track construction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an anti-vibration underground wall structure according to an embodiment of the present invention.

FIG. 2 is an enlarged front view of the vibration isolator having the vibration isolating underground wall structure shown in FIG.

FIG. 3 is a cross-sectional view showing a part of a construction process of the anti-vibration basement wall structure 20 shown in FIG.

FIG. 4 is a cross-sectional view showing a part of a construction process of the anti-vibration basement wall structure 20 shown in FIG.

5 is a cross-sectional view showing a part of a construction process of the vibration-proof basement wall structure 20 shown in FIG.

6 is a cross-sectional view showing a part of a construction process of the vibration-proof basement wall structure 20 shown in FIG.

FIG. 7 is a diagram showing measurement results of an octave band vibration acceleration level at a center frequency of 8 to 500 Hz on the retaining wall on the subway side and the first floor beam on the building side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Retaining wall 2 Building frame 3 Vibration isolator 6 Backfill soil 8 Retaining wall 20 Vibration-proof underground wall structure 21 Support member 22 Vibration-proof member

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02D 27/34 E04H 9/02 351

Claims (1)

(57) [Claims] 1. A retaining wall installed between a mountain retaining wall and a building frame with a gap therebetween, a backfill soil filled in a gap formed between the mountain retaining wall and the retaining wall, and the retaining wall. A plurality of vibration isolators installed between the side of the building and the side of the building frame,
The anti-vibration device has a structure in which an anti-vibration member is installed at one axial end of a support member whose axial length can be adjusted, and the other side in the axial direction of the support member is provided on the one side surface. An anti-vibration basement wall structure, characterized in that an end is applied, the anti-vibration member is applied to the other side surface, and an anti-vibration device is installed between both side surfaces.