JP6940092B2 - How to replace the seismic isolation support system and seismic isolation device - Google Patents

Description

The present invention is a seismic isolation support system that supports seismic isolation of the superstructure when exchanging a seismic isolation device installed between the superstructure and the substructure, and seismic isolation using the seismic isolation support system. Regarding how to replace the device.

Buildings are constructed as structures with seismic structures, seismic control structures, and seismic isolation structures so that they will not collapse in the event of an earthquake. The seismic structure is a structure that counteracts vibration by increasing the strength of the structure by increasing the thickness of the wall, thickening the columns, and inserting reinforcing materials. The vibration control structure is a structure in which a vibration reduction device called a damper is installed in the structure to absorb seismic energy and suppress vibration. The seismic isolation structure is a structure in which a seismic isolation device is installed between the substructure and the superstructure of the building, the superstructure is insulated from the ground, and vibration is not transmitted to the superstructure.

The seismic isolation device adopted in this seismic isolation structure is generally composed of an isolator and a damper. An isolator is a device that prolongs the natural period of the superstructure and supports the superstructure. Examples of the isolator include laminated rubber, a sliding member (sliding material) as an elastic sliding bearing, and the like. A damper is a device for reducing the shaking width of a superstructure during an earthquake and quickly suppressing the shaking. Examples of the damper include high damping rubber, steel rods, lead plugs, and a plate material (sliding plate) having a surface having a small frictional resistance, which is used together with the above-mentioned sliding material.

The seismic isolation device needs to be replaced with a new seismic isolation device when the life of the laminated rubber or the like, or when a large earthquake or fire occurs. Various methods have been proposed as the exchange method (see, for example, Patent Documents 1 to 3). In these methods, the jack-up device is used to reinforce the beams of the superstructure and between the reinforced beams and the substructure, or to reinforce and extend the seismic isolation device support, and the extended parts and superstructure. Place it between an object or a substructure. Then, the seismic isolation function can be maintained by interposing the above-mentioned sliding material and the above-mentioned sliding plate between the jack-up device and the reinforced beam or the substructure of the superstructure or the above-mentioned expanded portion. I am trying to do it.

Japanese Unexamined Patent Publication No. 2008-163636 Japanese Unexamined Patent Publication No. 2017-014853 Japanese Patent No. 6031626

However, in the conventional method, the beam on the planned installation location of the jack-up device is reinforced, the beam is reinforced by bridging a brace between adjacent beams, and the seismic isolation device support portion is reinforced and expanded. , Special reinforcement is required to install the jack-up device. In this case, there is a problem that the replacement work of the seismic isolation device cannot be easily carried out and the work cost is high.

Therefore, it is an object of the present invention to provide a device and a method capable of easily performing the work while maintaining the seismic isolation function even during the replacement work of the seismic isolation device and reducing the work cost.

The present invention has been made in view of the above problems, and is a seismic isolation support system that supports seismic isolation of the superstructure when the seismic isolation device installed between the superstructure and the substructure is replaced. And
A plurality of substructures provided on a seismic isolation device support that projects toward a superstructure for supporting the seismic isolation device and are arranged around the seismic isolation device to lift the superstructure. Lifting device and
A seismic isolation support system is provided that includes each of the plurality of lifting devices and a plurality of sliding members provided between the seismic isolation device support and the superstructure to make each lifting device slidable. ..

According to the present invention, even during the replacement work of the seismic isolation device, the work can be easily carried out while maintaining the seismic isolation function, and the work cost can be reduced.

The figure explaining the seismic isolation structure and the seismic isolation device. The figure which showed the configuration example of the seismic isolation support system. The figure which showed the arrangement example of the slide plate and the compact jack arranged on the seismic isolation device support part. A flowchart showing the work flow of replacing the seismic isolation device. The figure explaining the work from the delivery of the new seismic isolation device to the replacement. The figure explaining the work from the replacement of a new seismic isolation device to the whole small jack down after the replacement. The figure which illustrated the position of the seismic isolation device support part and the seismic isolation device, and the direction of exchanging the seismic isolation device. The figure explaining the work from the secondary whole jack-up to the unloading of the existing seismic isolation device. The figure which showed the 1st example of a sliding material and a sliding plate. The figure which showed the 2nd example of the sliding material and the sliding plate. The figure which showed the 3rd example of a sliding material and a sliding plate. The figure which illustrated the place where a sliding material is rotating. The figure which showed the 4th example of the sliding board.

Before explaining the seismic isolation support system for seismically supporting the superstructure of the present invention and the method of replacing the seismic isolation device using the seismic isolation support system, refer to FIG. 1 for the seismic isolation structure and the seismic isolation device. Will be described. In the seismic isolation structure, a seismic isolation device 12 is provided between the substructure 10 constructed on the ground and the superstructure 11 constructed on the upper part of the substructure 10, and the superstructure 11 is insulated from the ground. Therefore, the structure is such that vibration is not transmitted to the superstructure 11.

The substructure 10 includes, for example, a foundation footing 20 provided on the top of a foundation pile or on the ground, and an underground beam 21 extending in the horizontal direction by connecting two adjacent foundation footings 20. Further, the substructure 10 is provided between the upper ends of the underground beam 21, and includes a foundation slab 22 that is integrated with the foundation footing 20 and the underground beam 21 and covers the ground surface. Further, the substructure 10 includes a seismic isolation device support portion 23 that projects from the upper surface of the foundation slab 22 toward the superstructure 11. The seismic isolation device support portion 23 is constructed on the foundation footing 20 and is integrated with the foundation footing 20.

The superstructure 11 connects a pillar of a building extending in a direction perpendicular to the ground (vertical direction), two adjacent pillars, and a beam 30 extending in a direction parallel to the ground (horizontal direction), and a pillar and a beam. It is provided with a column-beam joint portion 31 for joining the 30. The column-beam joint portion 31 is provided at a position facing the seismic isolation device support portion 23.

The seismic isolation device 12 is installed between the seismic isolation device support portion 23 of the substructure 10 and the column-beam joint portion 31 of the superstructure 11. Here, the seismic isolation device 12 will be described as a laminated rubber isolator.

The seismic isolation device 12 is made by alternately stacking and adhering rubber plates and steel plates. The seismic isolation device support portion 23 is provided with a flange for connecting using a fastening means such as a bolt. The seismic isolation device 12 supports the superstructure 11 by deforming the laminated rubber portion, and prevents the vibration from being transmitted to the superstructure 11 even if the ground vibrates due to an earthquake.

Since the seismic isolation device 12 uses the rubber plate in this way, the existing seismic isolation device cannot obtain the desired effect in the event of a life due to deterioration of the rubber or the like, a large earthquake, or a fire. Therefore, it is necessary to carry out regular inspections and replace it with a new seismic isolation device if necessary. When replacing the seismic isolation device 12, the superstructure 11 is lifted up a little, and the existing seismic isolation device 12 is pulled out and a new seismic isolation device is inserted in the meantime. A seismic isolation support system that supports seismic isolation of the superstructure 11 used at this time will be described with reference to FIG.

The seismic isolation support system includes a plurality of lifting devices arranged on the seismic isolation device support portion 23 and around the seismic isolation device 12, each of the plurality of lifting devices, and the seismic isolation device support portion 23 and the upper part. It includes a plurality of sliding members provided between the column-beam joint portion 31 of the structure 11 and making each lifting device slidable.

Here, as a lifting device, it is not a large jack with a conventional lifting force (lift) of about 5000 kN and an internal oil pressure of about 70 MPa, but a compact compact with an ultra-high pressure of about 750 kN to 1000 kN and an internal oil pressure of about 200 MPa. Jack 40 is used. Further, as the sliding member, a sliding material attached to the top and bottom of the compact jack 40, and a sliding plate 41 that comes into contact with the sliding material to make the compact jack 40 slidable are used.

Except for the space for installing the seismic isolation device 12, the upper surface of the seismic isolation device support portion 23 does not have enough space for arranging a large jack used for replacing the conventional seismic isolation device 12, so that the seismic isolation device is supported. A large jack is arranged around the portion 23 by reinforcing the beam 30 or the like.

In the present invention, there is no space for arranging the conventional large jacks, but there is a space for arranging the small compact jacks 40. Therefore, by installing a plurality of compact jacks 40, the superstructure 11 is lifted and seismic isolation is achieved. The device 12 is replaced. In this way, since a plurality of compact jacks 40 are arranged below the beam-column joint 31 and only the beam-column joint 31 is lifted, no special reinforcement is required and the seismic isolation device 12 can be easily replaced. Therefore, the work cost can be reduced.

A plurality of compact jacks 40 are arranged around the seismic isolation device 12 on the seismic isolation device support portion 23, but if they are simply arranged, the compact jack 40 tilts when an earthquake occurs during the replacement work of the seismic isolation device 12. As a result, the superstructure 11 cannot be supported.

Therefore, a sliding material and a sliding plate 41 are provided between each compact jack 40 and the seismic isolation device support portion 23 so that the superstructure 11 can be supported by the plurality of compact jacks 40 even if an earthquake occurs. prepare. The sliding material is attached to the bottom of each compact jack 40, and the sliding plate 41 is installed in an empty space around the seismic isolation device 12 on the seismic isolation device support portion 23.

The sliding material is a material having a friction coefficient of a certain value or less, for example, a tetrafluoroethylene resin (PTFE) plate, and the sliding plate 41 is also a material having a friction coefficient of a certain value or less, for example, a stainless steel plate or a surface of a stainless steel plate. Those coated with PTFE can be used. Here, PTFE and stainless steel are given as examples as materials having a friction coefficient (low friction coefficient) of a certain value or less, but the present invention is not limited to this, and other materials having a low friction coefficient are used. Any material such as fluororesin may be used.

When the same PTFE is used for both the sliding material and the sliding plate 41 in contact with each other, that is, when a PTFE plate is used as the sliding material and the sliding plate is coated with PTFE on the surface of stainless steel. The coefficient of friction of the surface of the abutting PTFE is about 0.04. By the way, when polyethylene was used, 0.1 to 0.2 was used, when polycarbonate was used, 0.2 to 0.3, when polyvinyl chloride was used, 0.4 to 0.5, and polyamide was used. In the case of 0.3-0.5, PTFE has a very small coefficient of friction compared to these materials.

Stainless steel, or iron, has a coefficient of friction of about 0.5. If the materials that come into contact with each other are different materials, the coefficient of friction will change. By the way, the coefficient of friction of PTFE when iron and PTFE are in contact is 0.05 to 0.1, polyethylene is 0.08 to 0.2, polycarbonate is about 0.3, and polyvinyl chloride is 0.4 to 0.5 and polyamide are 0.3 to 0.4. From these facts, it is preferable that the friction coefficient is 0.5 or less, but it is more preferable that the friction coefficient is 0.1 or less in order to slide in response to fast vibration at the time of an earthquake.

The sliding material and the sliding plate 41 are not limited to those having a flat surface and having a surface having an arcuate cross section, and may have a certain curvature. In addition to the sliding material and the sliding plate 41, a rolling bearing (for example, a ball bearing) or the like may be adopted as the sliding member.

By interposing such a sliding material and a sliding plate 41, each compact jack 40 can be smoothly moved. As a result, it is possible to suppress the transmission of the seismic energy at the time of an earthquake to the compact jack 40, so that the compact jack 40 does not tilt and the superstructure 11 can be appropriately supported.

However, since the space on the seismic isolation device support portion 23 is limited, it is not possible to secure a large area of the sliding plate 41 as a sliding member. When the sliding plate 41 is installed so as to protrude horizontally from the seismic isolation device support portion 23, when the compact jack 40 moves to the protruding position, the load of the superstructure 11 is applied to the protruding position to support the sliding plate 41. This is because you will not be able to do it. In this case, the transmission of vibration energy to the superstructure 11 cannot be sufficiently suppressed, and the superstructure 11 may be damaged.

Therefore, in order to sufficiently secure the amount of displacement of the superstructure 11 in the horizontal direction parallel to the ground, a similar sliding member is provided between each compact jack 40 and the beam-column joint 31. By providing sliding members on both the top and bottom in this way, it is possible to secure twice the amount of displacement in the horizontal direction, and the jack can be placed on the small seismic isolation device support 23 while maintaining the seismic isolation function. It will be possible.

In the example shown in FIG. 2, the existing seismic isolation device 12 is connected to the upper and lower seismic isolation device support portions 23 and the beam-column joint portion 31 by bolts, and the seismic isolation device support portion around the existing seismic isolation device 12 A plurality of compact jacks 40 are arranged between the column 23 and the beam-column joint portion 31. In the compact jack 40, sliding members are attached to both the top and bottom, and sliding plates 41 are provided on both the seismic isolation device support portion 23 and the column-beam joint portion 31. The sliding plate 41 is integrated with the seismic isolation device support portion 23 and the beam-column joint portion 31, for example, by filling the mortar 42 on the seismic isolation device support portion 23 and the beam-column joint portion 31 and arranging the mortar 42 on the mortar 42. NS.

When a plurality of compact jacks 40 are used to lift the superstructure 11 and pull out the existing seismic isolation device 12 and insert and install a new seismic isolation device, if the superstructure 11 is lifted too much, the beam 30 of the superstructure 11 will crack. Etc. may occur and damage the superstructure 11. Therefore, it is necessary to lift while measuring the amount to be lifted (displacement amount). Therefore, the displacement measuring device 43 can be attached to the superstructure 11 and the displacement amount can be measured.

The displacement measuring device 43 may be a device using a ruler (scale), or a laser beam is applied to the upper surface of the seismic isolation device support portion 23 on which the seismic isolation device 12 is installed, and the reflected light is used. It may be a device for measuring a distance. As a method of measuring the distance by the reflected light, a method of measuring by using the principle of triangulation or a method of measuring by the phase difference between the irradiated laser light and the reflected light can be used. These methods are well known and will not be described in detail here. If the amount of displacement can be measured, the device may be a device that employs other methods such as a strain type displacement meter and a dial gauge.

With reference to FIG. 3, the positions where the sliding plate 41 and the compact jack 40 to be installed on the seismic isolation device support 23 are arranged will be described. FIG. 3 is a view of the seismic isolation device support 23 on which the seismic isolation device 12 is installed as viewed from above. The seismic isolation device 12 is substantially circular and is located at the center of the rectangular top of the seismic isolation device support 23. is set up. Six rectangular sliding plates 41 are installed around the seismic isolation device 12, and a substantially rectangular sliding material 44 on which two compact jacks 40 are placed is arranged on each sliding plate 41. Therefore, the two compact jacks 40 on one sliding member 44 move in the same direction as the sliding member 44 at the same time as the sliding member 44 moves.

In each sliding plate 41, the sliding material 44 arranged in the sliding material 44 moves from the sliding plate 41 to the outside of the sliding plate 41 so as to surround the periphery of the rectangle seen from above, and the seismic isolation device support portion. A frame (stopper) 45 provided on the outer periphery of the sliding plate 41 so as not to fall from the 23 and projecting toward the superstructure 11 can be provided. Similarly, each of the sliding plates 41 installed at the beam-column joint 31 facing each of the sliding plates 41 arranged on the seismic isolation device support portion 23 also protrudes toward the substructure 10 on the outer periphery thereof. A stopper 45 can be provided.

In the example shown in FIG. 3, the top of the seismic isolation device support portion 23 has a long rectangle in the direction of the foundation beams 24a and 24b connecting the foundations under the columns, and there is an empty space on the foundation beams 24a and 24b. Therefore, a plurality of sliding plates 41 and a plurality of compact jacks 40 are installed in the space. Therefore, the foundation beams 24a and 24b of the seismic isolation device 12 are closed by a plurality of compact jacks 40.

On the other hand, since the compact jack 40 is not installed on the foundation beam 24c side and the opposite side, the portion is in an open state. Therefore, the existing seismic isolation device 12 can be pulled out to the side of the foundation beam 24c, and a new seismic isolation device can be inserted and installed.

The replacement work of the seismic isolation device 12 will be described in detail with reference to FIGS. 4 to 8. The replacement work of the seismic isolation device 12 starts from step 400, and in step 405, materials and equipment are carried in. The materials and equipment include a plurality of compact jacks 40, a plurality of sliding materials 44, a plurality of sliding plates 41, a displacement measuring device 43, a new seismic isolation device, and the like. The materials and equipment can be hung by, for example, a mobile crane and carried into a predetermined place. Then, as shown in FIG. 5A, the transport vehicle 50 can carry in from a predetermined location to a position close to the target existing seismic isolation device 12. In the example shown in FIG. 5A, the new seismic isolation device 13 is carried in by the transport vehicle 50.

In step 410, as shown in FIG. 5B, the mortar 42 is filled around the existing seismic isolation device 12 on the seismic isolation device support portion 23, the sliding plate 41 is installed, and then the sliding material 44 is attached. Install the compact jack 40. Then, the displacement measuring device 43 is attached and installed at a predetermined position of the column-beam joint portion 31.

The compact jack 40 is a jack having a capacity of about 1.5 times the total column load when a plurality of jacks are installed, and the displacement measuring device 43 can measure the displacement amount (jack-up amount) in units of 0.1 mm. It is desirable to use the device.

In step 415, as shown in FIG. 5C, the superstructure 11 is jacked up to a height required for replacement of the seismic isolation device 12. At this time, if the bolt is tightened, loosen the bolt and jack up.

Jacking up is not performed only on the beam-column joints 31 on one seismic isolation device 12, but may be performed little by little on the beam-column joints 31 on all the seismic isolation devices 12 supporting the superstructure 11. preferable. This is because if only one part is jacked up greatly, the beam 30 and the like of the superstructure 11 may be greatly bent and damaged. Therefore, it is preferable that the amount of jacking up at one time is small because the superstructure 11 is less likely to be damaged.

In step 420, as shown in FIG. 7A, the existing seismic isolation device 12 is taken out. To take out the existing seismic isolation device 12, the bolts fixed to the seismic isolation device support portion 23 and the column-beam joint portion 31 are removed via the upper and lower flanges of the seismic isolation device 12. Then, under the lower flange of the seismic isolation device 12, a roller rod or the like having a circular cross section for pulling out the seismic isolation device 12 is inserted. The seismic isolation device 12 is not limited to the roller rod as long as it can be pulled out, and a Teflon (registered trademark) sheet or the like may be used.

The seismic isolation device 12 is taken out by laterally pulling it using a string-like object such as a chain block or a nylon sling. When the seismic isolation device 12 is pulled sideways, the roller rod under the seismic isolation device 12 rotates, and the seismic isolation device 12 exempts the seismic isolation device 12 from above the seismic isolation device support portion 23 in the direction of the foundation beam 24 as shown by the arrow line in FIG. 7 (a). It moves to the outside of the seismic isolation device support portion 23. Following the seismic isolation device 12, a temporary column 46 such as a carbon sandle for supporting the column-beam joint portion 31 is joined to the seismic isolation device support portion 23 in which the seismic isolation device 12 has existed until then. It is inserted between the portion 31 and the portion 31.

The height of the temporary column 46 can be the same as the distance between the current seismic isolation device support portion 23 and the column-beam joint portion 31. The temporary support column 46 can be inserted and arranged in the space created when the seismic isolation device 12 is pulled out. The existing seismic isolation device 12 that has been pulled out can be carried out by a transport vehicle 50 equipped with a lever block (registered trademark), which is a machine that pulls luggage by using a force pulled by a human hand, for example, a hand pallet truck.

The new seismic isolation device 13 may differ in height from the existing seismic isolation device 12, and if so, a height adjusting filler plate may be placed on either the top or bottom of the new seismic isolation device 13. It can be installed and adjusted in height. In step 425, the new seismic isolation device 13 is carried in by the transport vehicle 50 as shown in FIG. 7 (b), and the seismic isolation device support portion 23 is used by using a retractable stand or the like provided with the above lever block (registered trademark). Pull it up and install it on the seismic isolation device support 23. At this time, the temporary support column 46 is moved in accordance with the pull-in of the new seismic isolation device 13, and the new seismic isolation device 13 is further pulled in to install the existing seismic isolation device 12 at the position where it was installed. After installation, the roller rod placed under the new seismic isolation device 13 is removed. The new seismic isolation device 13 is fixed on the seismic isolation device support portion 23 by tightening bolts.

In step 430, it is confirmed whether all the existing seismic isolation devices 12 to be replaced have been replaced. The existing seismic isolation device 12 to be replaced may be all existing seismic isolation devices 12 or some existing seismic isolation devices 12. If not all have been replaced, the process returns to step 415, the same operation is performed for the next seismic isolation device 12, and the seismic isolation device 13 is replaced with a new one.

After confirming that all the existing seismic isolation devices 12 to be replaced in step 430 have been replaced, in step 435, the whole is jacked down as shown in FIG. 8A in the opposite manner to step 415. Return to the state before work. If height adjustment is required, insert a filler plate with a thickness corresponding to the height to be adjusted and adjust the height. The height adjustment can be performed while monitoring the displacement amount by the displacement measuring device 43. After the adjustment is completed and the whole is jacked down, the loosened bolts are finally tightened.

In step 440, as shown in FIG. 8B, the plurality of compact jacks 40 arranged around the seismic isolation device 13 and the displacement measuring device 43 are removed. At this time, the sliding plates 41 installed above and below the compact jack 40 are also removed, and the filled mortar 42 is also removed.

In step 445, as shown in FIG. 8 (c), the existing seismic isolation device 12, the plurality of compact jacks 40, the displacement measuring device 43, and other materials and equipment are brought to a predetermined location by the transport vehicle shown in FIG. 8 (c). It is transported by 50 and suspended from a predetermined place to the outside by a crane car or the like. After carrying out the materials and equipment, repair, clean up, clean, etc. the parts that need repair to restore them to their original state. When this unloading work is completed, the replacement work from the existing seismic isolation device 12 to the new seismic isolation device 13 is completed in step 450.

Next, the sliding member 44 and the sliding plate 41 provided between the compact jack 40 and the seismic isolation device support portion 23 and the column-beam joint portion 31 will be described with reference to FIGS. 9 to 13. FIG. 9A is a plan view showing a first example of the sliding member 44 and the sliding plate 41, and FIG. 9B is a cross-sectional view cut along the cutting line AA. The sliding member 44 includes a substantially circular bearing holder 60 attached to the bottom of the compact jack 40, and a substantially circular bearing 61 attached to the surface of the bearing holder 60 facing the sliding plate 41. The bearing holder 60 is made of steel such as carbon steel, and the bearing 61 is a plate-like material made of a material having a low coefficient of friction such as PTFE.

The sliding plate 41 is a plate-like material installed on the mortar 42, which is attached to a substantially square sole plate 62 and a surface of the sole plate 62 facing the compact jack 40, and is made of a material having a low coefficient of friction such as stainless steel. It is composed of a substantially square slide plate 63, which is a produced plate-like material. The sole plate 62 projects upward so as to surround the sole plate 62, and a stopper 45 for restricting the movement of the bearing holder 60 so as not to move out of the sole plate 62 is provided. The sole plate 62 and the stopper 45 can be made of the same steel as the bearing holder 60.

In the bearing holder 60 shown in FIG. 9, one compact jack 40 is attached and the one compact jack 40 is supported. The bearing 61 is used together with the slide plate 63 to allow one compact jack 40 attached to the bearing holder 60 to slide in the horizontal two-dimensional direction. However, since the sole plate 62 is provided with a stopper 45 on the outer periphery, the compact jack 40 can restrict the movement of the sole plate 62 to the outside.

10 and 11 are a plan view showing the second and third examples of the sliding member 44 and the sliding plate 41, and a cross-sectional view cut along the cutting line BB and the cutting line CC. The structure of the sliding member 44 and the sliding plate 41 is the same as that of the first example shown in FIG. 9, but the shapes thereof are different. In FIG. 10, the bearing holder 60, the bearing 61, the sole plate 62, and the slide plate 63 all have a substantially rectangular surface on which the compact jack 40 is attached.

In the example shown in FIG. 10, the mounting surface of the compact jack 40 included in the bearing holder 60 is substantially rectangular, and the length of the long side is approximately twice the length of the short side. Therefore, the bearing holder 60 is attached to the bottoms of the two compact jacks 40, and the two compact jacks 40 are configured to slide in the same direction at the same time.

In such a configuration, as shown in FIG. 12, the shape in the short side direction is centered on the center of gravity of the bearing holder 60 in order to secure the amount of movement even when the bearing holder 60 rotates with respect to the sole plate 62. , It has an arc shape with a radius of half the length in the long side direction. In the long side direction, the corners of the bearing holder 60 come into contact with the left and right stoppers 45 toward the paper surface, which is the edge of the sole plate 62, and finally return to a position parallel to the left and right stoppers 45. The moving distance can be secured. Therefore, the shape in the long side direction is left as a straight line.

However, if the short side direction is left straight and the surface of the bearing holder 60 is rectangular, the moment to return the rotation after the corners of the bearing holder 60 come into contact with the left and right stoppers 45 is small. Finally, there is a possibility that the position will not return to a position parallel to the upper and lower stoppers 45 in the short side direction. Therefore, the shape in the short side direction is made into an arc shape as described above so that the movement amount can be secured without returning to the parallel position.

Although the order of the description has been changed, the example shown in FIG. 11 has the same configuration as the example shown in FIGS. 9 and 10. However, in the example shown in FIG. 11, the bearing holder 60 is substantially rectangular, and the length of the long side is approximately four times the length of the short side. Therefore, the bearing holder 60 is attached to the bottom of the four compact jacks 40, and these four compact jacks 40 are configured to slide in the same direction at the same time.

The ratio of the length of the long side to the length of the short side is not limited to 2: 1 shown in FIG. 10 and 4: 1 shown in FIG. 11, but other than 3: 1 and 6: 1 and the like. It may be the ratio of. In order for the plurality of compact jacks 40 to properly support the superstructure 11 in the event of an earthquake, it is desirable that all of the plurality of compact jacks 40 slide in the same direction at the same time. For that purpose, it is desirable to increase the above ratio and to attach as many compact jacks 40 as possible to one bearing holder 60.

FIG. 13 is a diagram illustrating another configuration of the sliding plate 41. The slide plate 41 shown in FIG. 13 has the same configuration as the slide plate 41 shown in FIG. 9, but the friction coefficient of the slide plate 63 is the first region 65 indicated by the alternate long and short dash line according to the distance from the center position. The second region 66 and the third region 67, which are also indicated by the alternate long and short dash line, increase in order. By changing the coefficient of friction according to the position on the slide plate 63 in this way, the stopper 45 is slippery at the center position and easily stops as it moves toward the outer periphery, avoiding excessive collision with the stopper 45 and avoiding excessive collision with the stopper 45. In addition to preventing damage, it can act as a damper to quickly suppress the shaking of the superstructure 11 during an earthquake.

In the example shown in FIG. 13, the friction coefficient is changed in three steps, but the friction coefficient may be changed in two steps or in four or more steps. Further, the slide plate 63 whose friction coefficient is smoothly changed according to the distance from the center position may be used. Further, the shapes of the bearing holder 60, the bearing 61, the sole plate 62, and the slide plate 63 are not limited to a substantially circular shape, a substantially square shape, and a substantially rectangular shape, but are an ellipse, a substantially triangular shape, a polygonal shape of a pentagon or more, and the like. May be good. The coefficient of friction can be changed, for example, by changing the abrasive material or changing the material of the slide plate 63.

Further, the friction coefficient of the sliding member 44 attached to the top and bottom of the compact jack 40 or the sliding plate 41 provided therefor may be changed between the top side and the bottom side. For example, the friction coefficient of the sliding member 44 and the sliding plate 41 provided on the bottom side can be reduced, and the friction coefficient of the sliding member 44 and the sliding plate 41 provided on the top side can be made larger than that on the bottom side. In this way, the friction coefficient may be changed between the top side and the bottom side, and further, as shown in FIG. 13, the friction coefficient of the sliding plate 41 may be changed in a plurality of steps according to the distance from the center position.

Although the method of exchanging the support device and the seismic isolation device of the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the above-described embodiments, and other methods are used. It is included in the scope of the present invention as long as it can be changed within the range that can be conceived by those skilled in the art, such as embodiments, additions, changes, and deletions, and the actions and effects of the present invention are exhibited in any of the embodiments. It is a thing.

10 ... Substructure, 11 ... Superstructure, 12, 13 ... Seismic isolation device, 20 ... Foundation footing, 21 ... Underground beam, 22 ... Foundation slab, 23 ... Seismic isolation device support, 24, 24a, 24b, 24c ... foundation beam, 30 ... beam, 31 ... column-beam joint, 40 ... compact jack, 41 ... sliding plate, 42 ... mortar, 43 ... displacement measuring device, 44 ... sliding material, 45 ... stopper, 46 ... temporary support, 50 ... transport vehicle, 60 ... bearing holder, 61 ... bearing, 62 ... sole plate, 63 ... slide plate, 65 ... first region, 66 ... second region, 67 ... third region

Claims (6)

A seismic isolation support system that supports seismic isolation of the superstructure when the seismic isolation device installed between the superstructure and the substructure is replaced.
The substructure is provided and is arranged on and around the seismic isolation device and lifts the superstructure so as to project toward the superstructure for supporting the seismic isolation device. With multiple lifting devices for
Includes each of the plurality of lifting devices and a plurality of sliding members provided between the seismic isolation device support portion and the superstructure to make each of the lifting devices slidable.
Each of the sliding members is composed of a sliding material attached to the top and bottom of each lifting device, and a sliding plate provided on the seismic isolation device support portion and the superstructure.
Each of the sliding materials has a surface on which two or more of the lifting devices are attached, and the surface has a long shape on one side, and the shapes of both ends in the longitudinal direction of the surface are the shapes of the sliding materials in a plan view. It has an arc shape centered on the center of gravity and has an arc shape.
Each of the sliding plates extends toward the superstructure or the substructure, forms a predetermined size and surrounds the periphery of each of the sliding materials, and has a contact surface having a substantially rectangular shape in a plan view as an inner circumference. A seismic isolation support system comprising a frame to be provided, which limits the movement of the lifting device by the sliding material. Each of the sliding materials has a first surface, the first surface has a friction coefficient of a certain value or less, and each of the sliding plates has a second surface that abuts on the first surface. The seismic isolation support system according to claim 1, wherein the second surface has a friction coefficient of a certain value or less. The seismic isolation support system according to claim 2 , wherein each of the sliding plates has two or more regions having different friction coefficients on the second surface. The seismic isolation support system according to claim 2 or 3 , wherein the sliding material and the sliding plate attached to the top and bottom of each lifting device have different friction coefficients on the top side and the bottom side. The seismic isolation support system according to any one of claims 1 to 4 , further comprising a displacement measuring device installed on the superstructure or the substructure and measuring the displacement of the superstructure. It is a method of replacing the seismic isolation device installed between the superstructure and the substructure.
Each of the plurality of lifting devices for lifting the superstructure and the substructure are provided.
Between the seismic isolation device support portion and the superstructure that protrudes toward the superstructure for supporting the seismic isolation device, and around the seismic isolation device, the lifting devices and the lifting device. The process of installing multiple sliding members that make each lifting device slidable, and
The step of lifting the superstructure by the plurality of lifting devices, and
The process of pulling out the seismic isolation device installed on the seismic isolation device support portion and
The process of inserting a new seismic isolation device on the seismic isolation device support and
The step includes a step of lowering the superstructure by the plurality of lifting devices and applying a load of the superstructure to the new seismic isolation device.
Each of the sliding members is composed of a sliding material attached to the top and bottom of each lifting device, and a sliding plate provided on the seismic isolation device support portion and the superstructure.
Each of the sliding materials has a surface on which two or more of the lifting devices are attached, and the surface has a long shape on one side, and the shapes of both ends in the longitudinal direction of the surface are the shapes of the sliding materials in a plan view. It has an arc shape centered on the center of gravity and has an arc shape.
Each of the sliding plates extends toward the superstructure or the substructure, forms a predetermined size and surrounds the periphery of each of the sliding materials, and has a contact surface having a substantially rectangular shape in a plan view as an inner circumference. It is provided with a frame to be held, and the frame limits the movement of the lifting device by each of the sliding materials .
The installation step is a replacement method including a step of attaching two or more of the lifting devices to the surface of each of the sliding materials.

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