JP2016205012A - Seismic isolation jack device and seismic isolation device replacement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismic isolation device replacement method, which enables work to be conducted without imposing horizontal force on a seismic isolation support part, and seismic isolation device replacement work to be conducted so that a seismic isolation performance of a building is maintained.SOLUTION: A seismic isolation device replacement method comprises following processes: to dispose a seismic isolation support jack device 3 around an existing seismic isolation device 2 and fix a lower linear slider 5 on a foundation slab 11; to extend a support jack 6 to make an upper linear slider 4 butt to a lower flange 10A of a beam material 10 and bear a load of an upper structure; to fix the upper linear slider 4 to the lower flange 10A of the beam material 10 using a friction joint jig; to remove the existing seismic isolation device 2 from between the beam material 10 and the foundation slab 11; to fix another seismic isolation device 2 to a fitting part between the beam material 10 and the foundation slab 11; and to remove the seismic isolation support jack device 3 from between the beam material 10 and the foundation slab 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic isolation support jack device and a method for replacing a seismic isolation device.

  2. Description of the Related Art Conventionally, a laminated rubber in which an elastic body made of a rubber material and a steel plate are alternately laminated is known as a seismic isolation device employed in a base-isolated building. Such a seismic isolation device composed of laminated rubber is interposed between the building foundation (lower structure) and the building body (upper structure) constructed on this foundation, for example, and the horizontal force due to the earthquake is generated. When an input is made, the laminated rubber is deformed in the horizontal direction to reduce the transmission of the external force to the structure body and to suppress the shaking of the building body.

 In buildings equipped with such a seismic isolation device, it is common to periodically check the seismic isolation device and replace it if necessary. When exchanging the seismic isolation device, for example, an oil jack as shown in Patent Document 1 is used, and the upper structure such as a beam is lifted from below to be interposed between the upper structure and the lower structure. The seismic isolation device is removed and a new seismic isolation device is installed.

JP 2006-200361 A

  However, the conventional seismic isolation device replacement operation has a problem that the horizontal force due to the earthquake is transmitted to the superstructure because the portion supported by the jack is rigid with respect to the horizontal force. For this reason, it has been required to provide a support method in which the horizontal force is not easily transmitted to the superstructure even during the seismic isolation device replacement. However, since it is difficult to construct such a support mechanism, and since it will be installed only for a short period of time when the seismic isolation device is exchanged, it is set not to consider seismic force, especially for horizontal force measures There were many cases that could not be taken.

  The present invention has been made in view of the above-described problems, and can be operated without burdening the horizontal force at the seismic isolation bearing part, and the seismic isolation device can be replaced while maintaining the seismic isolation performance of the building. An object of the present invention is to provide a seismic isolation support jack device capable of performing work and a method of replacing the seismic isolation device.

  In order to achieve the above object, a seismic isolation support jack device according to the present invention is interposed between an upper structure and a lower structure positioned above and below a building, and the upper structure has seismic isolation performance. An apparatus is detachably fixed to the upper structure and is slidable along a first horizontal direction, and is detachably fixed to the lower structure and is fixed to the first horizontal direction. A lower sliding portion that is slidable along a second horizontal direction perpendicular to each other, and a support jack that has one end fixed to the upper sliding portion and the other end fixed to the lower sliding portion, and expands and contracts in the vertical direction. It is characterized by that.

  In addition, the seismic isolation device exchanging method according to the present invention uses the above-described seismic isolation support jack device, and replaces an existing seismic isolation device provided between the upper structure and the lower structure. A method for replacing a seismic device, the step of disposing the seismic isolation support jack device around the existing seismic isolation device, fixing the lower sliding portion to the lower structure, and extending the support jack to extend the support jack. A step of bringing the upper sliding portion into contact with the upper structure and bearing a load of the upper structure; a step of fixing the upper sliding portion to the upper structure; and the existing seismic isolation device with the upper structure and the lower portion Removing from between the structure, fixing another seismic isolation device to the attachment portion between the upper structure and the lower structure, and removing the seismic isolation support jack device from between the upper structure and the lower structure And having a process It is characterized in.

In the present invention, the seismic isolation support jack device is interposed between the upper structure and the lower structure, the upper sliding portion is fixed to the upper structure, the lower sliding portion is fixed to the lower structure and the supporting jack is extended. The load of the superstructure is supported by the seismic isolation support jack device. At this time, the horizontal force due to the earthquake is absorbed by sliding in two horizontal directions by the upper sliding portion and the lower sliding portion, and the upper structure can have seismic isolation performance by the seismic isolation support jack device. In addition, it is possible to reduce the horizontal resistance force at the support jack.
Therefore, by installing a seismic isolation support jack device in the vicinity of the seismic isolation device to be replaced and supporting the load of the upper structure, even if the seismic isolation device is removed from between the upper structure and the lower structure, The seismic isolation performance is maintained by the seismic isolation support jack device. In other words, even if an earthquake occurs when exchanging the seismic isolation device interposed between the upper structure and the lower structure, the upper structure is in a state of being isolated by the seismic isolation support jack device. Replacement work can be performed without bearing the horizontal force of the earthquake at the support part.
Furthermore, since the seismic isolation support jack device can be easily attached and detached between the upper structure and the lower structure, the work efficiency can be improved and the replacement work time can be shortened.

  In the seismic isolation support jack device according to the present invention, the upper sliding portion is fixed to the upper structure, and the first guide rail is disposed with the extending direction facing the first horizontal direction. A first sliding block that slides along the rail, and the lower sliding portion is fixed to the lower structure and is arranged with the extending direction facing the second horizontal direction, and And a second sliding block that slides along the second guide rail.

  With such a configuration, in the event of an earthquake, the first sliding block is guided by the first guide rail in the upper sliding portion and slides in the first horizontal direction, and the second sliding on the second guiding rail in the lower sliding portion. Since the moving block is guided and slips in the second horizontal direction, sliding in the two horizontal directions occurs, so that the horizontal force at the time of the earthquake is not transmitted to the superstructure, and seismic isolation performance can be ensured.

  In the seismic isolation support jack device according to the present invention, the upper structure is a beam member made of H-shaped steel, and the upper sliding portion is attached to and detached from the lower flange of the beam member by a friction welding jig. It may be fixed as possible.

  Furthermore, in the seismic isolation support jack device according to the present invention, the friction welding jig is in contact with an upper surface of a lower flange of the beam member and is in contact with both sides of the web of the beam member via a first spacer. An L-shaped attachment plate, and a high-strength bolt that fastens the L-shaped attachment plate and the upper sliding portion with a second spacer interposed therebetween, and the pair of L-shaped attachment plates It is preferable that the webs are bolted together.

  In the present invention, as described above, the seismic isolation support jack device has a structure in which the horizontal supporting force during an earthquake is difficult to be transmitted, and the upper structure can be provided with seismic isolation performance. On the other hand, it can be fixed by friction welding using a friction welding jig having a simple structure.

  Further, the seismic isolation support jack device according to the present invention may be provided with a level adjusting plate that is interposed between the lower sliding portion and the lower structure and has an upper surface parallel to the lower surface of the upper structure.

  In this case, since the upper surface of the level adjustment plate provided on the lower structure is parallel to the lower surface of the upper structure, the upper sliding portion that can slide in the first horizontal direction and the lower sliding portion that can slide in the second horizontal direction And can be installed in parallel. That is, even when the upper surface of the lower structure is not at a horizontal level, the lower sliding portion can be arranged to be at a horizontal level along the second horizontal direction.

  According to the seismic isolation support jack device and the method of replacing the seismic isolation device of the present invention, the seismic isolation support portion can work without burdening the horizontal force, and the seismic isolation performance is maintained while maintaining the seismic isolation performance of the building. Device replacement work can be performed.

It is a side view which shows the replacement | exchange method of the seismic isolation apparatus by embodiment of this invention. It is a perspective view which shows schematic structure of the seismic isolation support jack apparatus shown in FIG. It is a side view which shows the state which attached the seismic isolation support jack apparatus between the beam material and the foundation slab, and is the figure seen from the 2nd horizontal direction. It is the side view which shows the state which attached the seismic isolation support jack apparatus between the beam material and the foundation slab, and is the figure seen from the 1st horizontal direction. It is a top view of a linear slider, (a) is the figure which looked at the upper linear slider from the AA arrow line view shown in FIG. 3, and (b) is the arrow line view BB shown in FIG. It is the figure which looked at the lower linear slider from upper direction. (A)-(d) is a figure which shows the replacement procedure of a seismic isolation apparatus. It is a side view which shows the state which attached the seismic isolation support jack apparatus by a modification between a beam material and a foundation slab, Comprising: It is a figure corresponding to FIG.

  Hereinafter, a seismic isolation support jack device and a seismic isolation device replacement method according to embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the seismic isolation support jack device 3 according to the present embodiment is used when the seismic isolation device 2 using the seismic isolation rubber provided in the building 1 is replaced. The building 1 includes a plurality of seismic isolation devices 2 under the beam material 10 (upper structure) made of the H-shaped steel in the lowermost layer, and the plurality of seismic isolation devices 2 give the load of the building 1. Specifically, it is arranged between the column member 12 joined to the beam member 10 and the foundation slab 11 (lower structure). Here, in this Embodiment, the beam material 10 and the column material 12 comprise the upper structure.

  The seismic isolation device 2 includes a laminated rubber 23 interposed between a disk-shaped upper flange 21 and a lower flange 22. The laminated rubber 23 is obtained by alternately laminating steel plates and rubber sheets.

As shown in FIGS. 2 to 4, the seismic isolation support jack device 3 is interposed between the beam member 10 located above and below the building 1 and the foundation slab 11 when the seismic isolation device 2 is exchanged. In this way, the upper structure has seismic isolation performance.
The seismic isolation support jack device 3 is detachably fixed to the beam member 10 and detachably fixed to the upper linear slider 4 (upper sliding portion) slidable along the first horizontal direction X and the foundation slab 11. The lower linear slider 5 (lower sliding portion) is slidable along the second horizontal direction Y orthogonal to the first horizontal direction X, one end is fixed to the upper linear slider 4, and the other end is the lower linear slider. And a support jack 6 which is fixed to 5 and expands and contracts in the vertical direction.

As shown in FIG. 5A, the upper linear slider 4 is fixed to the lower flange 10A of the beam member 10 by using the friction welding jig 7, and is fixed to the lower surface of the upper plate 41 and extends. The upper linear rail 42 (first guide rail) arranged with the direction (longitudinal direction) oriented in the first horizontal direction X, and the upper linear block 43 (first sliding block) that slides along the upper linear rail 42 And.
Here, the longitudinal direction (first horizontal direction X) of the upper linear slider 4 coincides with the longitudinal direction of the beam member 10.

 As shown in FIG. 5B, the lower linear slider 5 includes a lower plate 51 fixed to the foundation slab 11 via a level adjusting plate 8 (see FIG. 4) described later using an anchor bolt or the like, and a lower plate A lower linear rail 52 (second guide rail) that is fixed to the upper surface of 51 and is arranged with the extending direction (longitudinal direction) oriented in the second horizontal direction Y, and a lower linear block that slides along the lower linear rail 52 53 (second sliding block).

  Each of the upper linear block 43 and the lower linear book 53 includes a plurality of ball bearings (not shown), and is slidably engaged by being guided by the upper linear rail 42 and the lower linear rail 52 via these ball bearings. doing.

  As shown in FIGS. 3 and 4, the support jack 6 includes a telescopic rod 61 that relatively moves the upper linear slider 4 and the lower linear slider 5 in a direction in which they are close to and away from each other. That is, when the seismic isolation support jack device 3 is installed, the telescopic rod 61 is provided so as to expand and contract in the vertical direction.

 Further, the seismic isolation support jack device 3 is provided with a level adjusting plate 8 having an upper surface 8a which is interposed between the lower linear slider 5 and the foundation slab 11 and which is parallel to the lower surface 10a of the lower flange 10A of the beam member 10. ing.

The friction joining jig 7 fixes the upper linear slider 4 to the lower flange 10 </ b> A of the beam member 10 by friction joining so as to be detachable.
Specifically, the friction welding jig 7 is in contact with the upper surface 10b of the lower flange 10A of the beam member 10 and a pair of L-shaped attachments that are in contact with both sides of the web 10B of the beam member 10 via the first spacers 72. And a pair of high-strength bolts 74 that fasten the L-shaped attachment plate 71 and the upper plate 41 of the upper linear slider 4 with the second spacer 73 interposed therebetween. A pair of L-shaped attachment plates 71, 71 are fastened and joined by a plurality (four in this case) of bolts 75 with the web 10 </ b> B of the beam member 10 being sandwiched therebetween.
Further, a plurality of sets (three sets in this case) of the set of L-shaped attachment plates 71 are arranged along the first horizontal direction X at a predetermined interval. Specifically, the pair of L-shaped attachment plates 71, 71 are provided at three positions in the longitudinal direction of the upper plate 41, that is, both side portions and the central portion.

The L-shaped attachment plate 71 has an L shape bent 90 degrees, and one first plate surface 71A is detachably fixed to the web 10B of the beam member 10 with a bolt 75 via a first spacer 72. The second spacer surface 71 is sandwiched between the second plate surface 71B and the upper surface 10b of the lower flange 10A of the beam member 10, and is detachably fixed by a high strength bolt 74.
In the present embodiment, the second spacer 73 is set to a thickness dimension that is slightly larger than the height dimension (thickness dimension) of the lower flange 10A.
A rib 76 for reinforcing the L-shaped attachment plate 71 is provided on the inner corner side of the L-shaped attachment plate 71.

  Next, the exchange method of the seismic isolation apparatus 2 using the seismic isolation support jack apparatus 3 is demonstrated based on drawing. Here, a method for exchanging a plurality of existing seismic isolation devices 2 installed in the building 1 for each seismic isolation device 2 will be described.

As shown in FIG. 6A, a plurality of seismic isolation support jack devices 3 are fixed under 2 to 4 beam members 10 surrounding the seismic isolation device 2 in plan view. The seismic isolation support jack device 3 in a state where the level adjusting plate 8 (see FIGS. 3 and 4) is separated is previously carried into the seismic isolation space where the seismic isolation device 2 is arranged.
In addition, as a setting position of the seismic isolation support jack apparatus 3, it is preferable to install 2 to 3 seismic isolation support jack apparatuses 3 at a location near the seismic isolation apparatus 2 and one seismic isolation apparatus 2. However, the number of seismic isolation support jack devices 3 is not particularly limited. For example, when the space | interval of adjacent seismic isolation apparatus 2 and 2 is small, you may arrange | position the seismic isolation support jack apparatus 3 in the intermediate part of both.

  First, as shown in FIGS. 3 and 4, the level adjusting plate 8 is fixed at a predetermined position on the foundation slab 11, and the upper surface 8a of the level adjusting plate 8 is parallel to the lower surface 10a of the lower flange 10A of the beam member 10. Like that. Thereafter, the base plate 51 of the lower linear slider 5 is fixed on the fixed level adjusting plate 8 to dispose the seismic isolation support jack device 3.

  Next, as shown in FIG. 6B, the expansion rod 61 of the support jack 6 is extended so that the upper plate 41 (see FIG. 3) of the upper linear slider 4 contacts the lower surface 10a of the lower flange 10A of the beam member 10. Further, the seismic isolation support jack device 3 bears the load of the superstructure by lifting and supporting the beam member 10 by jacking up. Thereby, it will be in the state in which the load of the upper structure is not acting on the existing seismic isolation apparatus 2. FIG.

Next, as shown in FIGS. 3 and 4, the upper linear slider 4 is fixed to the beam member 10 using the friction welding jig 7. That is, the first plate surfaces 71A of the pair of L-shaped attachment plates 71, 71 are fastened and fixed to the web 10B of the beam member 10 by the bolts 75 via the first spacers 72. And, with the other second plate surface 71B in contact with the upper surface 10b of the lower flange 10A of the beam member 10, the second spacer 73 is sandwiched between the upper plate 41 and tightened with a high strength bolt 74. The upper linear slider 4 is fixed to the beam member 10 by friction bonding.
It should be noted that by changing the thickness of the second spacer 73, a height adjustment function is provided that allows the seismic isolation support jack device 3 to be arranged in accordance with the height dimension between the beam member 10 and the foundation slab 11. Is also possible.

Next, as shown in FIGS. 1 and 6B, the bolts of the upper flange 21 and the lower flange 22 of the seismic isolation device 2 are removed, and the existing seismic isolation device 2 is removed from between the column 12 and the foundation slab 11. Remove.
Then, as shown in FIG.6 (c), another seismic isolation apparatus 2 is fixed to the attachment part S (refer FIG.6 (b)). This is done by fixing the upper flange 21 and the lower flange 22 of the seismic isolation device 2 to be newly attached with bolts. Further, after the seismic isolation device 2 is fixed, the friction welding jig 7 in the seismic isolation support jack device 3 shown in FIG. 3 is removed, and the support jack 6 is reduced to support the beam member 10 from below. Is released (unloaded). And as shown in FIG.6 (d), the seismic isolation support jack apparatus 3 is moved to the location of the seismic isolation apparatus 2 which replaces next, and the same operation | work is performed sequentially.

  Such replacement work can be performed in parallel at a plurality of locations in the seismic isolation region of the building 1, or all seismic isolation devices 2 provided in the building 1 may be performed simultaneously. . In this case, since two to three seismic isolation support jack devices 3 are arranged for each seismic isolation device 2, it is necessary to prepare many seismic isolation support jack devices 3. In this case, since the load of the building 1 is not exchanged in a state where the seismic isolation device 2 and the seismic isolation support jack device 3 coexist, the superstructure is lifted simultaneously by a plurality of seismic isolation support jack devices 3. Therefore, the upper structure can be supported in a stable posture.

  As described above, in the seismic isolation support jack device and the method of replacing the seismic isolation device according to the present embodiment, the seismic isolation support jack device 3 is interposed between the beam member 10 and the foundation slab 11, as shown in FIG. The upper linear slider 4 is fixed to the beam member 10, the lower sliding portion is fixed to the foundation slab 11, and the support jack 6 is extended, so that the seismic isolation support jack device 3 includes the upper structure including the beam member 10. The load is supported. At this time, the horizontal force due to the earthquake is absorbed by sliding in the two horizontal directions (first horizontal direction X and second horizontal direction Y) by the upper linear slider 4 and the lower linear slider 5, and the beam material 10 is supported by the seismic isolation support jack device 3. It is possible to provide seismic isolation performance to the superstructure including In addition, the horizontal resistance force at the support jack 6 can be kept small.

Specifically, in the upper linear slider 4, the upper linear block 43 is guided to the upper linear rail 42 and slides in the first horizontal direction X in the upper linear slider 4, and the lower linear block 53 is guided to the lower linear rail 52 in the lower linear slider 5. Since the sliding in the two horizontal directions is generated by sliding in the second horizontal direction Y, the horizontal force at the time of the earthquake is not transmitted to the superstructure, and seismic isolation performance can be ensured.
A bearing (not shown) is provided between the upper linear block 43 and the upper linear rail 42 and between the lower linear block 53 and the lower linear rail 52 so as to be slidably supported.

Therefore, the seismic isolation support jack device 3 is disposed in the vicinity of the seismic isolation device 2 to be replaced, and the load of the superstructure including the beam material 10 is supported, so that the seismic isolation device 2 is connected to the beam material 10 and the foundation slab 11. Even in the state where it is removed from between, the seismic isolation performance of the superstructure is maintained by the seismic isolation support jack device 3. That is, even if an earthquake occurs when the seismic isolation device 2 interposed between the beam member 10 and the foundation slab 11 is replaced, the upper structure is in a state of being seismically isolated by the seismic isolation support jack device 3. The replacement work can be performed without bearing the horizontal force of the earthquake at the support portion where the seismic isolation device 2 is arranged.
Furthermore, since the seismic isolation support jack device 3 can be easily attached and detached between the beam member 10 and the foundation slab 11, work efficiency can be improved and replacement work time can be shortened. .

  In the present embodiment, as described above, the seismic isolation support jack device 3 has a structure in which the horizontal support force during an earthquake is difficult to be transmitted, so that the upper structure can have seismic isolation performance. The linear slider 4 can be fixed to the lower flange 10A of the beam member 10 by friction welding using a friction welding jig 7 having a simple structure.

  In the present embodiment, the upper surface 8a of the level adjusting plate 8 provided on the foundation slab 11 is parallel to the lower surface 10a of the lower flange 10A of the beam member 10, so that the upper linear that can slide in the first horizontal direction X is used. The slider 4 and the lower linear slider 5 slidable in the second horizontal direction Y can be installed in parallel. That is, even when the upper surface of the foundation slab 11 is not at a horizontal level, the lower linear slider 5 can be arranged along the second horizontal direction Y so as to be at a horizontal level.

  As described above, according to the seismic isolation support jack device and the seismic isolation device replacement method of the present embodiment, it is possible to perform work without burdening the horizontal force at the seismic isolation support portion, and to improve the seismic isolation performance of the building 1. The seismic isolation device 2 can be replaced in the maintained state.

  The embodiments of the seismic isolation support jack device and the seismic isolation device replacement method according to the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and may be appropriately selected without departing from the scope of the present invention. It can be changed.

For example, in the present embodiment, the upper linear slider 4 and the lower linear slider 5 having bearings are used as the upper sliding portion and the lower sliding portion, respectively, but the present invention is not limited to this. For example, a sliding bearing using a sliding material such as Teflon (registered trademark) may be used.
Further, the configurations of the upper linear slider 4 and the lower linear slider 5 are not limited to the present embodiment. For example, the length and number of linear rails 42 and 52, the method of fixing the upper plate 41 and the lower plate 51, and the like can be set as appropriate. For example, as the upper linear slider 4, two upper linear rails 42 that extend in parallel and an upper linear block 43 that slides along each of the upper linear rails 42 may be provided.

Moreover, in this Embodiment, as an object which attaches the seismic isolation support jack apparatus 3, the upper structure is the beam material 10 (column material 12) and the lower structure is the basic slab 11, but it is not limited to this.
For example, as shown in FIG. 7, the superstructure beam may be reinforced concrete (RC). In this case, the upper plate 41 of the upper linear slider 4 is fixed to the lower surface 13a of the RC beam 13 with a plurality of anchor bolts 91 via the mortar material 9. That is, in this case, the upper linear slider 4 and the lower linear slider 5 are detachably fixed to the upper structure and the lower structure by the same fixing method. Here, the plurality of anchor bolts 91 are arranged at equal intervals along the first horizontal direction X on both sides of the upper linear rail 42.

  Further, the friction welding jig is not limited to the configuration provided with the L-shaped attachment plate 71 as in the present embodiment. For example, the first spacer 72 may be omitted, or the L-shaped attachment plate 71 and the second spacer 73 may be integrally formed.

Furthermore, in the present embodiment, the longitudinal direction (first horizontal direction X) of the upper linear slider 4 is fixed toward the material axis direction of the beam member 10, but the direction of the upper linear slider 4 is limited. is not.
Furthermore, the level adjustment plate 8 may be omitted, and the lower plate 51 of the lower linear slider 5 may be directly fixed to the basic slab 11.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

1 Building 2 Seismic Isolation Device 3 Seismic Isolation Support Jack Device 4 Upper Linear Slider (Upper Sliding Part)
5 Lower linear slider (lower sliding part)
6 Support jack 7 Friction welding jig 8 Level adjustment plate 10, 13 Beam material (superstructure)
10A Lower flange 10B Web 10a Lower surface 10b Upper surface 11 Foundation slab (lower structure)
41 Upper plate 42 Upper linear rail (first guide rail)
43 Upper linear block (first sliding block)
51 Lower plate 52 Lower linear rail (second guide rail)
53 Lower linear block (second sliding block)
71 L-shaped attachment plate 72 First spacer 73 Second spacer 74 High-strength bolt 75 Bolt X First horizontal direction Y Second horizontal direction

Claims (6)

A seismic isolation support jack device interposed between an upper structure and a lower structure located above and below the building, and having the upper structure with seismic isolation performance,
An upper sliding portion that is detachably fixed to the upper structure and is slidable along the first horizontal direction;
A lower sliding portion that is detachably fixed to the lower structure and is slidable along a second horizontal direction orthogonal to the first horizontal direction;
A support jack having one end fixed to the upper sliding portion and the other end fixed to the lower sliding portion and extending and contracting vertically;
A seismic isolation support jack device characterized by comprising: The upper sliding portion is fixed to the upper structure and is arranged with the extending direction thereof oriented in the first horizontal direction, and a first sliding block that slides along the first guide rail. With
The lower sliding portion includes a second guide rail that is fixed to the lower structure and arranged in an extending direction toward the second horizontal direction, and a second sliding block that slides along the second guide rail. The seismic isolation support jack device according to claim 1. The superstructure is a beam made of H-section steel,
The seismic isolation support jack device according to claim 1, wherein the upper sliding portion is detachably fixed to a lower flange of the beam member by a friction welding jig. The friction welding jig is
A pair of L-shaped attachment plates that are in contact with the upper surface of the lower flange of the beam material and are in contact with both sides of the web of the beam material via a first spacer;
A high-strength bolt that tightens the L-shaped attachment plate and the upper sliding portion with a second spacer interposed therebetween,
The seismic isolation support jack device according to claim 3, wherein the pair of L-shaped attachment plates are bolted to each other with the web interposed therebetween.  5. The level adjusting plate is provided between the lower sliding portion and the lower structure and has an upper surface parallel to a lower surface of the upper structure. The described seismic isolation support jack device. A seismic isolation device for exchanging an existing seismic isolation device provided between the upper structure and the lower structure using the seismic isolation support jack device according to any one of claims 1 to 5. An exchange method,
Placing the seismic isolation support jack device around the existing seismic isolation device, and fixing the lower sliding portion to the lower structure;
Extending the support jack to bring the upper sliding portion into contact with the upper structure and bearing the load of the upper structure;
Fixing the upper sliding portion to the upper structure;
Removing the existing seismic isolation device from between the upper structure and the lower structure;
Fixing another seismic isolation device to a mounting portion between the upper structure and the lower structure;
Removing the seismic isolation support jack device from between the upper structure and the lower structure;
A method of replacing a seismic isolation device, characterized by comprising:

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