JP2016160623A - Base isolation repair method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation repair method of installing a base isolation device on an existing skeleton while easily and precisely keeping constant a preloading state in which the base isolation device is loaded with predetermined certain axial force.SOLUTION: A base isolation device is installed on an existing pole. A method comprises: steps S1-S4 of removing a part of the existing pole and installing the base isolation device; a step S5 of installing a support member between the existing pole and base isolation device; steps S5-S7 of installing a plurality of hydraulic jacks on an upper surface of the base isolation device, and introducing axial force into the base isolation device by those hydraulic jacks; and steps S8, S9 of re-bearing the introduced axial force by the support member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seismic isolation repair method for isolating existing buildings, for example.

  Conventionally, as a method of seismic isolation repair to make existing buildings seismic isolation, seismic isolation devices are installed on pillars on the middle floor of the building and the upper floor is seismically isolated from the seismic isolation layer. There is a basic seismic isolation system that installs seismic isolation devices directly below, directly above, or at the top of the pile to make the entire building seismic isolation.

  For example, in the seismic isolation of the intermediate floor of Patent Document 1, after installing a new frame structure composed of a new column with a seismic isolation device and a new beam on the outer periphery of an existing building, the new frame structure and existing By connecting a horizontal member that supports a plurality of cut pillars in the building, the upper floor of the cut pillars is seismically isolated. In this case, the existing column of the existing building is cut, and the column beam structure composed of the cut existing column and the existing beam is supported by a new horizontal member, and the upper floor of the existing building is supported. Replace the weight with the new frame. The feature of this construction method is that the existing pillars are cut and the seismic isolation devices are not installed at the cut points, so that the construction range within the building can be limited.

  However, if the equivalent amount of axial force borne by the existing pillar has not been previously introduced into the seismic isolation device, the newly installed pillar will There was a tendency to sink slightly. The amount of subsidence was not uniform in the newly constructed frame with new pillars, and there was a risk of uneven settlement depending on the progress of the seismic isolation repair work.

  Therefore, in order to solve this problem, it has been proposed that a load is applied to the laminated rubber in advance in the compression direction (hereinafter referred to as preload), and in this state, the laminated rubber is installed in the field ( Patent Document 2). If it does in this way, it will be in the state where compression force was beforehand applied to lamination rubber by preloading, and variation in the amount of shrinkage of lamination rubber can be controlled, and it can prevent that existing buildings sink. In addition, the newly installed seismic isolation device is subjected to the weight of the building that was borne by the existing pillars after removing the temporary support members provided around the seismic isolation device. By introducing the amount and integrating it with the existing frame in a state in which the laminated rubber has been contracted by a predetermined amount in advance, it is possible to prevent the settlement of the upper floor of the building including the existing column supported by the seismic isolation device.

  Further, Patent Document 2 uses a method in which a retractable jack is installed between the upper and lower flange plates of the laminated rubber, the upper and lower flange plates are brought close to each other by this jack, and a preload is introduced into the laminated rubber, or a flat jack is used. A conventional method is shown.

JP 2005-171659 A Japanese Patent Laid-Open No. 10-280705

  As shown above, in the preload method in which a predetermined axial force equivalent amount is introduced into the seismic isolation device in advance, it is necessary to maintain the preload for a predetermined period after the seismic isolation device is installed. In this case, there is a problem that it is difficult to keep the oil inside the jack constant in a high-pressure state for a long time due to the structure.

  The present invention provides a predetermined constant axis for the seismic isolation device in a period from immediately after the seismic isolation device is installed to after the seismic isolation device is fixed to the existing housing after cutting and removing at least a part of the existing building. It is an object of the present invention to provide a seismic isolation repair method in which a seismic isolation device is installed in an existing frame while maintaining a preloaded state in which force is loaded easily and accurately.

  The present inventors inserted the seismic isolation device into the space for cutting and removing the existing frame, installed a plurality of removable jacks on it, and operated the jack to introduce a predetermined axial force into the seismic isolation device. Later, grout material or non-shrinkable concrete is filled in close contact with the support member provided around the jack and the seismic isolation device or the existing housing to fix the height of the support member, It was found that the axial force introduced into the seismic isolation device can be replaced by this support member.

  The seismic isolation repair method according to the first invention cuts and removes at least a part of the housing (for example, the existing pillar 10 described later), provides a cutting / removing space in the housing, and then exempts the cutting / removing space. A support member that can be vertically expanded and contracted between a step of installing a seismic device (for example, a seismic isolation device 20 described later) (for example, steps S1 to S4 described later) and the upper surface of the casing and the seismic isolation device. Installing a plurality of jacks (for example, a hydraulic jack 51, which will be described later) on the upper surface of the seismic isolation device and installing the axial force to the seismic isolation device by installing a plurality of jacks (for example, a hydraulic jack 51, which will be described later) And a step of replacing the axial force introduced by the jack with the support member (for example, steps S8 and S9 to be described later). .

  According to this invention, the seismic isolation device is firmly preloaded, the seismic isolation device is prevented from sinking, and the stability accuracy of the seismic isolation building after repair can be improved. Available. In addition, the work space can be secured around the cutting and removing space by installing the jack between the newly installed seismic isolation device and the upper housing instead of installing the jack around the cutting and removing space.

  In the seismic isolation repair method of the second invention, a temporary support member (for example, a temporary support column 50 described later) is disposed around the casing and the casing is temporarily supported by the temporary support member (for example, described later). Step S1), a step of cutting and removing at least a part of the housing, and providing a cutting and removing space in the housing (for example, Step S2 described later), and a step of installing a seismic isolation device in the cutting and removing space (For example, steps S3 and S4 described later), a step of installing a support member that can be vertically expanded and contracted between the casing and the upper surface of the seismic isolation device (for example, step S5 described later), and the seismic isolation A step of installing a plurality of jacks on the upper surface or the lower surface of the device, operating the jack to introduce axial force into the seismic isolation device (for example, steps S6 and S7 described later), and between the housing and the support member, Grout or The step of filling the shrinkage concrete and fixing the height of the axial force supporting member (for example, step S8 described later), the axial force introduced by the jack is unloaded, and the introduced axial force is reduced. And a step of receiving the support member (for example, step S9 described later).

  According to the present invention, in the step of fixing the height of the support member, the grout is provided between the seismic isolation device (upper surface or lower surface) and the support member, or between the support member and the existing housing (upper housing or lower housing). By filling the material or the non-shrinkable concrete, the seismic isolation device and the existing housing can be closely adhered. Moreover, the axial force introduced into the seismic isolation device can be kept constant accurately and over a long period of time by bringing the seismic isolation device and the existing housing into close contact with each other via the support member.

  In the seismic isolation repair method according to the third aspect of the invention, the support member (for example, support members 60, 70, 80, 90 described later) is provided around the jack and has a partially cut arc-shaped lower frame. (For example, a lower ring frame 61 to be described later), an arc-shaped upper frame (for example, an upper ring frame 62 to be described later) provided on the lower surface of the housing and disposed to face the arc-shaped lower frame, A connecting portion (for example, a connecting portion 52 described later) that connects the lower frame and the upper frame, and the connecting portion is formed of grout material or non-shrinkable concrete.

  According to the present invention, since the support member is an arc-shaped compression resistance member partially divided, a plurality of jacks can be taken out and reused after the introduction axial force is received by the support member. Further, the support member is formed of an upper frame and a lower frame having a connecting portion, and can be used as a filling material for both a grout material and a non-shrinkable concrete as a formwork.

  In the seismic isolation repair method of the fourth invention, the support member (for example, support member 90 described later) is formed of a plurality of concrete block bodies provided around the jack.

  According to the present invention, the concrete block body has a specific gravity smaller than that of the steel material, and can be formed in an arbitrary shape at a light weight and at a low cost. Further, the concrete block body can be installed at an arbitrary position around the jack.

In accordance with the present invention, immediately after the seismic isolation device is inserted into the existing building, by pre-loading the amount equivalent to the axial force borne by the seismic isolation device after the seismic isolation repair, the subsidence of the building after the seismic isolation repair is reduced. Can be prevented.
The axial force equivalent to be introduced into the seismic isolation device in advance is introduced with a plurality of jacks and then replaced with a support member made of grouting material or non-shrinkable concrete. Can hold power.

It is sectional drawing of the existing pillar in which the seismic isolation apparatus was installed by the seismic isolation repair method which concerns on 1st Embodiment of this invention. It is sectional drawing of the seismic isolation apparatus which concerns on 1st Embodiment. It is a flowchart of the procedure which installs a seismic isolation apparatus by the seismic isolation repair method which concerns on 1st Embodiment. It is explanatory drawing (the 1) of the procedure which installs a seismic isolation apparatus by the seismic isolation repair method which concerns on 1st Embodiment. It is explanatory drawing (the 2) of the procedure which installs a seismic isolation apparatus by the seismic isolation repair method which concerns on 1st Embodiment. It is explanatory drawing (the 3) of the procedure which installs a seismic isolation apparatus by the seismic isolation repair method which concerns on 1st Embodiment. It is explanatory drawing (the 4) of the procedure which installs a seismic isolation apparatus by the seismic isolation repair method which concerns on 1st Embodiment. It is the plane sectional view and AA sectional view of the supporting member used for the seismic isolation repair method concerning a 1st embodiment. It is explanatory drawing (the 5) of the procedure which installs a seismic isolation apparatus by the seismic isolation repair method which concerns on 1st Embodiment. It is a plane sectional view of the support member concerning a 1st embodiment. It is explanatory drawing of operation | movement of the supporting member which concerns on 1st Embodiment. It is explanatory drawing (the 6) of the procedure which installs a seismic isolation apparatus by the seismic isolation repair method which concerns on 1st Embodiment. It is sectional drawing of the existing pillar in which the seismic isolation apparatus was installed by the seismic isolation repair method which concerns on 2nd Embodiment of this invention. It is sectional drawing of the existing pillar in which the seismic isolation apparatus was installed by the seismic isolation repair method which concerns on 3rd Embodiment of this invention. It is sectional drawing of the existing pillar in which the seismic isolation apparatus was installed by the seismic isolation repair method which concerns on 4th Embodiment of this invention.

  The present invention is a seismic isolation repair method in which a seismic isolation device is newly installed in at least a part of an existing building, and a predetermined high axial force is introduced and held in the seismic isolation device to be inserted. It is an invention related to a seismic isolation repair method that is integrated with an existing building in a state.

The axial force introduction method is common, and a plurality of jacks are arranged on the upper part of the seismic isolation device, and a predetermined high axial force is introduced by these jacks. After the introduction of the axial force, there are Embodiments 1 to 4 for the support member that is the axial force holding means.
1st Embodiment is comprised with a lower ring frame and an upper ring frame, and fills the clearance gap between both ring frames with a grout material (refer FIG. 6, FIG. 11). In the second embodiment, a lower ring frame and an upper ring frame have a double pipe structure (see FIG. 13). In the third embodiment, the inner wall surface of the support member is made of steel, and the mesh wall is provided on the other wall surface (see FIG. 14). In the fourth embodiment, the support member is composed of a concrete block (see FIG. 15).

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
In this embodiment, the support member is composed of a lower ring frame and an upper ring frame, and the height of the support member is fixed by filling the gap between the lower ring frame and the upper ring frame with grout material or non-shrinkable concrete. It is a method to do.

FIG. 1 is a cross-sectional view of an existing column 10 in which a seismic isolation device 20 is installed by the seismic isolation repair method according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the seismic isolation device 20.
Specifically, by installing the seismic isolation device 20 on the existing pillar 10 as the frame of the existing building 2, the base isolation structure 1 is constructed, and the upper part from the first floor level of the existing building 2 is seismically isolated. To do.

The existing pillar 10 is, for example, a pillar on the first basement floor of the existing building 2. The column base portion of the existing column 10 is joined to the first basement floor 11, and the column head of the existing column 10 is joined to the first floor beam 12 and the first floor 13.
The seismic isolation device 20 is installed at an intermediate height of the existing pillar 10, and a reinforcing frame 14 is constructed on the lower surface of the first-floor beam 12.

The base isolation structure 1 includes the above-described base isolation device 20, the lower base isolation base 30 constructed including the lower column housing 10A, and the upper base isolation base 40 constructed including the upper column housing 10B. .
A lower base plate 31 is driven into the upper surface of the lower base isolation base 30. The lower base plate 31 has a plurality of female screw portions 32 arranged in an annular shape.
An upper base plate 41 is driven into the lower surface of the upper base isolation base 40. The upper base plate 41 has a plurality of female screw portions 42 arranged in an annular shape. Further, a support member 60 described later is driven into the upper base isolation base 40.

The seismic isolation device 20 includes a lower flange 21, a laminated rubber 22 provided on the lower flange 21, and an upper flange 23 provided on the laminated rubber 22.
The lower flange 21 is fixed to the female thread portion 32 of the lower base plate 31 of the lower base isolation base 30 with bolts 24.
The upper flange 23 is fixed to the female thread portion 42 of the upper base plate 41 of the upper seismic isolation base 40 with bolts 24.

  According to the procedure for installing the seismic isolation device 20 shown in FIG. 3, in step S <b> 1, the provisional support column 50 is installed as shown in FIG. 4. First, the reinforcing frame 14 is constructed on the lower surface of the first floor beam 12. Next, a temporary support column 50 as a temporary support member is arranged in the vicinity of the existing column 10 where the seismic isolation device 20 is installed, and the temporary support column 50 allows the first floor beam 12 to be temporarily mounted from the first floor 11 below the basement. Support.

  In step S2, as shown in FIG. 4, the existing pillar 10 is cut with a wire saw or the like, the concrete frame in the middle portion of the existing pillar 10 is removed, and the upper existing pillar 10 and the lower existing pillar 10 A cutting and removing space 3 is provided between the two. Here, the lower column housing 10A serving as the lower housing is defined as the lower column housing 10A below the portion of the existing column 10 where the seismic isolation device 20 is installed, and the upper column housing 10B serving as the upper housing is disposed above the portion where the seismic isolation device is installed. .

In step S3, as shown in FIG. 5, the lower base isolation base 30 is constructed. Specifically, the lower base plate 31 is mounted on the lower column housing 10A, and the formwork is built by arranging the bars, and concrete is placed in the formwork.
In step S4, the seismic isolation device 20 is attached on the lower base plate 31, as shown in FIG. In this state, a cutting / removing space 3 is formed between the seismic isolation device 20 and the upper column housing 10B.

In step S <b> 5, as shown in FIG. 6, a support member 60 that can be expanded and contracted vertically is assembled, and the assembled support member 60 is installed on the upper base plate 41. Then, as shown in FIG. 7, the upper base plate 41 in which the support member 60 is integrated is attached on the seismic isolation device 20.
Thereby, the support member 60 is provided between the upper column housing 10 </ b> B and the upper surface of the seismic isolation device 20.

  A support member 60 shown in FIG. 8 is made of steel and includes a pair of lower ring frames 61 and an upper ring frame 62 provided on the lower ring frames 61.

  Specifically, the support member 60 is an arc-shaped compression resistance member that is partially cut around a hydraulic jack 51 to be described later, and the divided portion is a jack insertion / extraction port (for example, a later-described jack). It is a jack insertion / extraction part 63).

The lower ring frame 61 includes an arc-shaped bottom portion 611 and wall portions 612 erected on both end sides of the bottom portion 611.
The upper ring frame 62 is a pair of arc-shaped lower flanges 621 that can be moved up and down by fitting with the lower ring frame 61, a web 622 erected along the center of the lower flange 621, A disc-shaped flange plate 623 provided at the upper end and stiffeners 624 provided at predetermined intervals along the web 622 are provided.

A height adjusting bolt 625 is screwed into the lower flange 621 at a predetermined position.
The support member 60 is provided with a lower ring frame 61 and an upper ring frame 62, and a jack insertion / extraction portion 63 is provided on a side surface of the support member 60.

  In step S <b> 6, as shown in FIGS. 9 and 10, the hydraulic jacks 51 as the plurality of axial force introducing means are inserted from the jack insertion / extraction portions 63 of the support member 60 and are arranged inside the plurality of support members 60. . Thereby, the hydraulic jack 51 is provided between the upper column housing 10 </ b> B and the upper surface of the seismic isolation device 20.

In step S7, as shown in FIG. 11, the upper jack plate 41 is pressed against the flange plate 623 of the support member 60 by the hydraulic jack 51, and this pressing force is maintained. That is, a reaction force is applied to the upper column housing 10B by the hydraulic jack 51, an axial force is introduced into the seismic isolation device 20, and the introduced axial force is maintained.
As a result, the load of the existing building 2 supported by the temporary support column 50 is transferred to the hydraulic jack 51.

  Then, in the support member 60, the upper ring frame 62 rises with respect to the lower ring frame 61, and the gap d between the bottom 611 of the lower ring frame 61 and the lower flange 621 of the upper ring frame 62 increases.

  In step S8, as shown in FIG. 11, the height adjustment bolt 625 is adjusted so that the support member 60 is stretched between the upper column housing 10B and the upper base plate 41, that is, the seismic isolation device 20. Next, the grout material 52 is filled in the gap between the bottom 611 of the lower ring frame 61 of the support member 60 and the lower flange 621 of the upper ring frame 62 to fix the height of the support member 60. The grout material 52 is hardened and becomes a connecting portion that connects the lower ring frame 61 and the upper ring frame 62.

In step S <b> 9, after the strength of the grout material 52 is developed, the hydraulic jack 51 is removed and unloaded, and the introduced axial force is transferred to the support member 60.
In step S10, as shown in FIG. 12, the upper seismic isolation foundation 40 is constructed by removing the hydraulic jack 51, arranging the bars and building the formwork, and placing concrete in the formwork.

According to the first embodiment, there are the following effects.
(1) A support member 60 that can be vertically expanded and contracted is provided between the upper column housing 10 </ b> B and the upper surface of the seismic isolation device 20. Then, an axial force is introduced into the seismic isolation device 20 (preload), and the support member 60 is stretched between the upper column housing 10B and the seismic isolation device 20, and the support member 60 is filled with the grout material 52 in this state. Then, the expansion and contraction of the support member 60 is fixed. Thereafter, the axial force is unloaded and the introduced axial force is received by the support member 60.
In this way, since the introduced axial force is received by the support member 60, it is not necessary to maintain the axial force with a hydraulic jack as in the prior art, so that the preload can be maintained over a long period of time.
Moreover, since it is not the structure which connects the upper and lower flange plates with a rod like the past, it is not necessary to remove a rod and a preload can be hold | maintained at low cost.

[Second Embodiment]
In this embodiment, the lower ring frame and the upper ring frame of the support member are formed as a double ring. By filling the space between the double rings with grout material or non-shrinkable concrete, the height of the support member is increased. It is a method of fixing the thickness.

  FIG. 13 shows a cross-sectional view of the support member 70. In this embodiment, the structure of the support member 70 is different from that of the first embodiment, and other structures are the same as those of the first embodiment.

The lower ring frame 71 is a double ring, and includes an arc-shaped inner wall portion 711 and an arc-shaped outer wall portion 712 provided outside the inner wall portion 711.
The upper ring frame 72 is a double ring and is provided at the upper ends of the arc-shaped inner wall portion 721, the arc-shaped outer wall portion 722 provided outside the inner wall portion 721, and the wall portions 721 and 722. A disc-shaped flange plate 723.

The wall part 721 can slide up and down with respect to the wall part 711, and the wall part 722 can slide up and down with respect to the wall part 712.
In this embodiment, in step S8, the grout material 52 is filled between the walls 711, 712, 721, and 722.

According to the second embodiment, in addition to the effects of the first embodiment described above, there are the following effects.
(2) Since the lower ring frame 71 and the upper ring frame 72 constituting the support member have a double tube structure, the tube functions as a formwork and structural material, and the gap between both the ring frames is surely secured. Can be filled with grout material or non-shrinkable concrete.

[Third Embodiment]
In this embodiment, the inner wall surface of the support member is a steel plate, a mesh mold is disposed on the outer wall surface, and a grout material or non-shrinkable concrete is filled between the steel plate and the mesh mold, thereby supporting the member. It is a method of fixing the height of the.

  FIG. 14 shows a cross-sectional view of the support member 80. In this embodiment, the structure of the support member 80 is different from that of the first embodiment, and other structures are the same as those of the first embodiment.

The lower ring frame 81 includes an arcuate wall portion 811.
The upper ring frame 82 includes an arc-shaped wall portion 821 and a disk-shaped flange plate 822 provided at the upper end of the wall portion 821. The wall portion 821 can slide up and down with respect to the wall portion 811.

  In this embodiment, in step S <b> 8, the mesh mold 83 is built outside the walls 811 and 821, and the grout material 52 is filled between the walls 811 and 821 and the mesh mold 83.

According to the third embodiment, in addition to the effects of the first and second embodiments, there are the following effects.
The support member 70 has a lower ring frame 81 and an upper ring frame 82 as a single tube structure, an inner wall surface serving as a mold frame and structural material, a mesh mold frame 83 provided on the outer wall surface, and a grout material inside the mold frame. Etc. to provide a grout layer or a non-shrinkable concrete layer.

  (3) The height of the support member 70 is determined by the gap space between the seismic isolation device 20 and the upper column housing 10B, but the thickness and shape of the support member 70 are the positions where the mesh formwork 83 is installed according to the amount corresponding to the preload axial force. Can be changed arbitrarily.

[Fourth Embodiment]
FIG. 15 shows a cross-sectional view of the support member 90.
In the present embodiment, a plurality of concrete blocks are arranged as the support member 90, and a gap between the seismic isolation device and the concrete block or between the concrete block and the upper frame is filled with a grout material or a non-shrinkable concrete material. And fixing the height of the support member.

In the present embodiment, the structure of the support member 90 is different from that of the first embodiment, and other structures are the same as those of the first embodiment.
The support member 90 is a concrete block constructed of high-strength concrete. By making the concrete block stronger than the concrete strength of the upper column housing 10B, even if it is a rectangular support member 90 that is smaller than the cross-sectional area of the housing, the equivalent amount of axial force that the existing housing that has been removed and cut has borne Can be held.

In the present embodiment, in step S8, the grout material 52 is filled between the support member 90 and the upper columnar housing 10B.
According to the fourth embodiment, in addition to the effects of the first to third embodiments, there are the following effects.

(4) By configuring the support member 90 with a plurality of concrete block bodies, the installation position of the support member 90 can be changed to some extent around the hydraulic jack 51.
(5) The concrete block body is lighter and cheaper than the steel material.

In each embodiment of the present invention, the hydraulic jack 51 as the introducing means is installed on the seismic isolation device 20, but may be installed below the seismic isolation device. Modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in this embodiment, the seismic isolation device is provided on the existing pillar of the existing building. However, the present invention is not limited to this, and a new foundation is constructed immediately below the existing foundation, and the seismic isolation device is provided between the new foundation and the existing foundation. May be provided.

1 ... Seismic isolation structure 2 ... Existing building 3 ... Cutting and removal space 10 ... Existing pillar (frame)
DESCRIPTION OF SYMBOLS 10A ... Lower column housing (lower housing) 10B ... Upper column housing (upper housing) 11 ... Basement 1st floor 12 ... 1st floor beam 13 ... 1st floor 14 ... Reinforcement housing 20 ... Seismic isolation device 21 ... Lower flange 22 ... Lamination Rubber 23 ... Upper flange 24 ... Bolt 30 ... Lower seismic isolation base 31 ... Lower base plate 32 ... Female thread part 40 ... Upper seismic isolation base 41 ... Upper base plate 42 ... Female thread part 50 ... Temporary support column (temporary support member)
DESCRIPTION OF SYMBOLS 51 ... Hydraulic jack (Axial force introduction means) 52 ... Grout material, connection part 60 ... Support member 61 ... Lower ring frame 62 ... Upper ring frame 63 ... Jack insertion / extraction part 70 ... Support member 71 ... Lower ring frame 72 ... Upper part Ring frame 80 ... support member 81 ... lower ring frame 82 ... upper ring frame 83 ... mesh mold 90 ... support member 611 ... bottom 612 ... wall 621 ... lower flange 622 ... web 623 ... flange plate 624 ... stiffeners 711, 721 ... Inner wall portion 712, 722 ... Outer wall portion 723 ... Flange plate 811, 821 ... Wall portion 822 ... Flange plate

Claims (4)

It is a seismic isolation repair method that installs seismic isolation devices in the frame,
Cutting and removing at least a part of the housing, providing a cutting and removing space in the housing, and then installing a seismic isolation device in the cutting and removing space;
A step of installing a support member that can be vertically expanded and contracted between the housing and the seismic isolation device;
Installing a plurality of jacks on the upper surface of the seismic isolation device, operating the jack and introducing axial force to the seismic isolation device;
And a step of replacing the axial force introduced by the jack with the support member. It is a seismic isolation repair method that installs seismic isolation devices in the frame,
Disposing a temporary support member around the housing and temporarily supporting the housing by the temporary support member;
Cutting and removing at least part of the housing, and providing a cutting and removing space in the housing;
Placing the seismic isolation device in the cutting and removing space;
A step of installing a support member that can be vertically expanded and contracted between the housing and the upper surface of the seismic isolation device;
Installing a plurality of jacks on the upper surface of the seismic isolation device, operating the jack and introducing axial force to the seismic isolation device;
Filling the grout material or non-shrinkable concrete between the housing and the support member, and fixing the height of the support member;
Unloading the axial force introduced by the jack and replacing the introduced axial force with the support member. The support member is an arc-shaped lower frame provided around the jack and partially divided;
An arcuate upper frame provided on the lower surface of the housing and disposed opposite the arcuate lower frame;
A connecting portion for connecting the lower frame and the upper frame,
The seismic isolation repair method according to claim 1 or 2, wherein the connecting portion is formed of grout material or non-shrinkable concrete.   The seismic isolation repair method according to claim 1, wherein the support member is formed of a plurality of concrete block bodies provided around the jack.

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