JP3698774B2 - Traffic vibration and earthquake vibration isolator for floating slabs. - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a traffic vibration and earthquake vibration isolator for floating slabs such as railways and motorways.
[0002]
[Prior art]
In general, railroads and automobile roads become vibration sources due to the transportation itself such as trains and automobiles that travel on the railroads or automobiles, that is, traffic vibration sources. In particular, vibration generated from a slab track or the like is transmitted to a building or the like that is directly connected to the slab and has an unbearable influence on the environment such as an office or a residence in the building.
[0003]
Conventionally, a slab track is separated from a foundation structure to form a floating slab, and rubber or a spring is interposed between the floating slab and the foundation structure. There was an anti-vibration device that prevented it from being transmitted to buildings. This type of floating slab is provided with a stopper on the substructure K next to the floating slab F, as shown in FIG. 6 (A), in order to ensure stability against rolling due to train traveling or as a countermeasure against earthquakes. S is provided, or the stopper S is provided between the connecting portions of the floating slab F as shown in FIGS. A is a vibration isolator made of rubber or a spring.
[0004]
[Problems to be solved by the invention]
In the conventional vibration isolator T consisting only of rubber and spring, since the attenuation is small, there is a possibility that the track slab will resonate when the train travels, and vibrations and solid sounds may be generated around it. At times, excessive shaking may occur, and it is necessary to construct a stopper S.
[0005]
The present invention has been made to solve the above-described conventional problems, and the object of the present invention is to further reduce vibration to the surroundings by reducing resonance due to vibration from transportation such as a train, It is an object of the present invention to provide a vibration vibration and earthquake vibration isolator for a floating slab that can suppress excessive shaking of the floating slab during an earthquake and, as a result, does not require a special stopper.
[0006]
[Means for Solving the Problems]
In the floating vibration slab of the present invention, a vibration proofing device for traffic vibration and earthquake is provided by inserting a vibration proofing unit between a foundation structure and a floating slab on which a transportation such as a railway or an automobile road runs. In the vibration isolator for reducing vibrations and traffic transmitted between the vehicle and the foundation structure, the vibration isolation unit includes an upper plate fixed to the floating slab and a lower plate fixed to the foundation structure. And a plurality of compression coil springs arranged between the upper plate and the lower plate, a vertical seismic device, and a horizontal seismic device. Further, the present invention is characterized in that damping means is interposed between the floating slab and the foundation structure.
[0007]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, 1 is a substructure, 2 is a floating slab, and a plurality of anti-vibration units A and damping devices B are interposed therebetween. As long as the foundation structure 1 can support the floating slab 2 such as RC (steel reinforced), SRC (steel reinforced concrete) or S (steel) building, viaduct, bridge, tunnel, etc., Any structure may be used. The floating slab 2 is not limited to a railroad slab, but is an RC slab, an SRC slab or an S slab on which a transportation such as an automobile road runs. Any separated slab structure may be used. In FIG. 1, M is a sleeper and R is a rail. The sleeper M may have a structure not used.
[0008]
As shown in FIG. 2, the anti-vibration unit A includes a metal upper plate 3, a metal lower plate 4, a number of compression coil springs 5, a plurality of vertical seismic devices 6, and a horizontal seismic device. 7.
[0009]
The metal upper plate 3 is fixed to the floating slab 2 by fitting a mounting hole 3a into a bolt (not shown) planted on the lower surface of the floating slab 2 and tightening with a nut or the like. The Similarly, the lower plate 4 made of metal is also provided with a foundation structure by fitting a mounting hole 4a into a bolt (not shown) planted on the upper surface of the foundation structure 1 and tightening with a nut or the like. Fixed to the object 1.
[0010]
The compression coil springs 5 are arranged in a matrix between the upper plate 3 and the lower plate 4, but the arrangement method is not limited to this. Each compression coil spring 5 is fitted into a protrusion 3 b protruding from the lower surface of the upper plate 3 and a protrusion 4 c protruding from a mounting plate 4 b provided on the upper surface of the lower plate 4. Positioned so as not to shift.
[0011]
The compression coil spring 5 of the present embodiment has, for example, a spring constant of 41.46 kgf / mm, a diameter of 8 mm, a coil average diameter of 28 mm, an inner diameter of 20 mm, an outer diameter of 36 mm, an effective number of turns of 4.5, a total number of turns of 6.5, A total of 49 items of 57mm in length and 51.5mm in height when mounted, etc. are used in 7 columns x 7 rows, but this is not restrictive. In short, it is effective by setting a low natural frequency. It suffices if it can be vibrated.
[0012]
As shown in an enlarged view in FIG. 3, the vertical seismic device 6 has a seismic bolt 6 a screwed to the lower plate 4, and a through hole 3 c is formed in the upper plate 3 to be held below. A portion 3d is formed, and the head 6b of the seismic bolt 6a is accommodated in the through hole 3c and the holding portion 3d. An elastic material 6c such as rubber is attached to the upper and lower surfaces of the head 6b, and the head 6b can move slightly in the vertical direction and the horizontal direction (X and Y directions shown in FIG. 2). It is accommodated in the holding part 3d.
[0013]
The horizontal seismic resistance device 7 is configured by inserting a laminated rubber 7 c between brackets 7 a and 7 b provided on the upper plate 3 and the lower plate 4. A total of eight are arranged in each of four in the direction and Y direction.
[0014]
FIG. 5 shows the damping device B of FIG. 1, and a storage tank member 8 in which an outer cylinder 8b and an inner cylinder 8c are erected on the upper surface of a bottom plate 8a to form an annular storage tank 8d, and the storage tank 8d. The silicon oil 9 stored therein, and the cylinder 10b is suspended from the lower surface of the lid plate 10a and a resistance plate 10c is attached to the tip of the cylinder 10b, and the resistance plate 10c is submerged in the silicon oil 9. And is composed of. In the present embodiment, the inner cylinder 8c can be omitted, and the shape of the resistance plate 10c is not limited to this.
[0015]
Since the vibration isolator of the present embodiment is configured as described above, when a train or the like travels on the floating slab 2, this vibration is transmitted to the upper plate 3 via the floating slab 2. The vibration transmitted to the upper plate 3 is absorbed and damped by the numerous compression coil springs 5 and hardly transmitted to the lower plate 4 and the foundation structure 1.
[0016]
Further, when the foundation structure 1 vibrates due to an earthquake, the vertical vibration of the vibration is blocked by the vertical seismic resistance device 6 and the horizontal (X / Y direction) vibration is suppressed by the horizontal earthquake resistance. Blocked by device 7. In the present invention, when the damping device B is used in combination, the conventional stopper becomes unnecessary, and the vertical and horizontal seismic devices 6 and 7 can be omitted.
[0018]
When the anti-vibration unit A is used alone, the attenuation constant is relatively small. Therefore, the floating slab 2 may resonate and amplify the amplitude when the train is running, and vibration may be transmitted to the surroundings. By using the device B together with the anti-vibration unit A, not only the resonance can be suppressed, but also the response of the floating slab 2 itself can be reduced at the time of an earthquake, and the earthquake resistance can be further improved. it can.
[0019]
The damping means in the present invention is not limited to the damping device B. For example, a general oil damper, an elastic-plastic damper such as a loop steel bar damper, a straight steel bar damper, a viscoelastic damper, a viscous damper, A friction damper may be used.
[0020]
【The invention's effect】
1) a substructure, between the floating slab transportation such as railways or highways travels, tighten let through the anti-vibration Uni Tsu DOO, Ya traffic transmitted between said floating slab substructure In the vibration isolator for reducing earthquake vibration, the vibration isolating unit is arranged between the upper plate fixed to the floating slab, the lower plate fixed to the foundation structure, and the upper plate and the lower plate. A large number of compression coil springs, vertical earthquake proofing devices, and horizontal earthquake proofing devices, so that the above-described compression coil springs can reduce traffic vibrations transmitted from the floating slab to the foundation structure and prevent vibrations. The solid sound can be further reduced. Further, the vertical quake-proof device and the horizontal quake-proof device can effectively suppress the swing of the floating slab at the time of an earthquake, and the transportation such as a train can be safely run. Furthermore, there is no need to provide a conventional stopper.
By interposed a damping means between the 2) substructure and floating slab, it is possible to effectively reduce the resonance of the floating slab, also the use of a low natural frequency of the vibration damping device can also be a result Higher vibration isolation effect can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram in which a floating slab is provided on a foundation structure via a vibration isolation unit.
FIG. 2 is a plan view (A) and a cross-sectional view (B) of an embodiment of a vibration isolation unit.
FIG. 3 is a cross-sectional view of the vertical seismic resistance device.
FIG. 4 is a side view of the horizontal seismic resistance device.
FIG. 5A is a plan view of an attenuation device, and FIG.
FIG. 6 is a cross-sectional view (A) of a conventional anti-vibration device for a floating slab provided with a stopper, a plan view (B), and a side cross-sectional view (C) of another conventional device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Substructure 2 Floating slab 3 Upper plate 3a Mounting hole 3b Protrusion 3c Through-hole 3d Holding part 4 Lower plate 4a Mounting hole 4b Mounting plate 4c Protrusion 5 Compression coil spring 6 Vertical earthquake-resistant device 6a Earthquake-proof bolt 6b Head 6c Elastic material 7 Horizontal earthquake-resistant device 7a Bracket 7b Bracket 7c Laminated rubber 8 Storage tank member 8a Bottom plate 8b Outer cylinder 8c Inner cylinder 8d Storage tank 9 Silicon oil 10 Actuating member 10a Cover plate 10b Cylinder 10c Resistance plate A Vibration isolation unit B Damping device F Floating slab K Foundation structure S Stopper

Claims (2)

An anti-vibration unit is inserted between the foundation structure and the floating slab on which transportation such as railways and motorways travels, so that vibrations of traffic and earthquakes transmitted between the floating slab and the foundation structure can be reduced. In the anti-vibration device to be reduced, the anti- vibration unit includes an upper plate fixed to the floating slab, a lower plate fixed to the foundation structure, and a number of compressions arranged between the upper plate and the lower plate. A traffic vibration and seismic isolation device for a floating slab, comprising a coil spring, a vertical seismic device, and a horizontal seismic device. 2. The vibration vibration and earthquake vibration isolator for a floating slab according to claim 1, wherein a damping means is interposed between the floating slab and the foundation structure.

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