Seismic isolation device installation method and seismic isolation device installation structure

Abstract

To safely carry out installation work of a seismic isolation device by increasing resistance to horizontal external force acting on a building during the installation work while facilitating the installation work.SOLUTION: An upper structure has an upper horizontal portion and an upper connection portion including first and second upper protruding portions protruding downwardly from the upper horizontal portion and spaced apart in a first direction. A lower structure has a lower horizontal portion and a lower connecting portion including first and second lower protruding portions projecting upwardly from the lower horizontal portion and spaced apart in the first direction. An installation method for a seismic isolation device includes a horizontal opposing member installation step of arranging a horizontal opposing member opposing a horizontal external force in the first direction along the first direction between the first upper protruding portion and the second upper protruding portion, and between the first lower protruding portion and the second lower protruding portion, and a connecting step of connecting between the horizontal opposing member and the upper connecting portion and between the horizontal opposing member and the lower connecting portion after the horizontal opposing member installation step.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a method for installing a seismic isolation device and a structure for installing a seismic isolation device. [Background technology]

[0002] A construction method is being implemented in which the columns of an existing building are cut and seismic isolation devices are installed at the cut points to achieve seismic isolation. In Patent Document 1, in order to increase the resistance to earthquakes (horizontal external forces) acting on the building during seismic isolation work, X-shaped braces and K-shaped braces are installed as temporary braces in the openings between the columns before the columns are cut. This improves construction safety. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-200361 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when a counter member is installed diagonally in an opening between columns as in Patent Document 1, there is a risk that the counter member will bend or buckle when a horizontal external force acts on the building. This results in problems such as insufficient strength against horizontal external forces or the need to install an unnecessary number of counter members. Furthermore, when installing counter members diagonally, construction is relatively complicated, as it requires driving many anchors into the columns, beams, floors, etc. of an existing building, attaching gusset plates, and then placing the counter member diagonally between the gusset plates.

[0005] The present invention was made in consideration of such problems, and its purpose is to facilitate the installation of seismic isolation devices while increasing the resistance to horizontal external forces acting on the building during installation, thereby enabling safe installation. [Means for solving the problem]

[0006] In order to achieve this object, the method for installing a seismic isolation device of the present invention is a method for installing a seismic isolation device between an upper structure and a lower structure, the upper structure has an upper horizontal portion, and an upper connecting portion including a first upper protruding portion and a second upper protruding portion that protrude downward from the upper horizontal portion and are spaced apart in a first direction; the lower structure has a lower horizontal portion, and a lower connecting portion including a first lower protruding portion and a second lower protruding portion that protrude upward from the lower horizontal portion and are spaced apart in the first direction; The method for installing the seismic isolation device is as follows: a horizontal opposing member installation process of arranging a horizontal opposing member along the first direction between the first upper protrusion and the second upper protrusion and between the first lower protrusion and the second lower protrusion, the horizontal opposing member opposing the horizontal external force in the first direction; A connecting step of connecting the horizontal opposing member and the upper connecting portion, and the horizontal opposing member and the lower connecting portion, after the horizontal opposing member installation step. A connecting step of installing a connecting member that is a member that can be extended and contracted in the vertical direction between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion. and, The present invention is characterized by having the following.

[0007] According to this seismic isolation device installation method, horizontal external forces acting on the superstructure can be transmitted to the substructure via the horizontal countermeasure members, preventing the superstructure from shifting relative to the substructure and allowing for safe construction. Furthermore, the horizontal countermeasure members can be easily installed along the first direction. Furthermore, bending or buckling is less likely to occur in the horizontal countermeasure members, increasing the building's resistance to horizontal external forces and allowing for safe construction. Examples of construction work to which this seismic isolation device installation method can be applied include construction work in which existing columns are cut to install seismic isolation devices, and construction work in which existing seismic isolation devices are removed and new seismic isolation devices are installed.

[0008] Furthermore, since the horizontal opposing member and the upper connecting section are connected, and the horizontal opposing member and the lower connecting section are connected, it is possible to suppress the rotation of the horizontal opposing member caused by the moment with the lower structure as the reaction point, which is generated by the horizontal external force acting on the upper structure. This makes it possible to install the seismic isolation device more safely between the upper structure and the lower structure.

[0009] Also, a method for installing a seismic isolation device between an upper structure and a lower structure, the upper structure has an upper horizontal portion, and an upper connecting portion including a first upper protruding portion and a second upper protruding portion that protrude downward from the upper horizontal portion and are spaced apart in a first direction; the lower structure has a lower horizontal portion, and a lower connecting portion including a first lower protruding portion and a second lower protruding portion that protrude upward from the lower horizontal portion and are spaced apart in the first direction; the seismic isolation devices are respectively installed between a first upper foundation protruding below the first upper protrusion and a first lower foundation protruding above the first lower protrusion, and between a second upper foundation protruding below the second upper protrusion and a second lower foundation protruding above the second lower protrusion; The method for installing the seismic isolation device is as follows: a horizontal opposing member installation process for arranging a horizontal opposing member along the first direction between the first upper foundation and the second upper foundation and between the first lower foundation and the second lower foundation, the horizontal opposing member opposing the horizontal external force in the first direction; A connecting step of connecting the horizontal opposing member and the upper connecting portion, and the horizontal opposing member and the lower connecting portion, after the horizontal opposing member installation step. A connecting step of installing a connecting member that is a member that can be extended and contracted in the vertical direction between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion. and, The present invention is characterized by having the following.

[0010] According to this method for installing a seismic isolation device, horizontal external forces acting on the superstructure can be transmitted to the substructure via the horizontal countermeasure members, preventing misalignment of the superstructure relative to the substructure and allowing for safe installation. Furthermore, the horizontal countermeasure members can be easily installed along the first direction. Furthermore, bending or buckling of the horizontal countermeasure members is less likely to occur, increasing the building's resistance to horizontal external forces and allowing for safe installation.

[0011] Furthermore, since the horizontal opposing member and the upper connecting section are connected, and the horizontal opposing member and the lower connecting section are connected, it is possible to suppress the rotation of the horizontal opposing member caused by the moment with the lower structure as the reaction point, which is generated by the horizontal external force acting on the upper structure. This makes it possible to install the seismic isolation device more safely between the upper structure and the lower structure.

[0012] A method for installing such a seismic isolation device, In the connecting step, a filler is filled between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion.

[0013] According to this method of installing a seismic isolation device, the horizontal countermeasure member and the upper connecting part and / or the horizontal countermeasure member and the lower connecting part are securely connected by the infill material, which makes it possible to suppress rotation of the horizontal countermeasure member due to a moment with the lower structure as the reaction point, which is generated by a horizontal external force acting on the upper structure.

[0014] A method for installing such a seismic isolation device, In the connecting step, between the horizontal opposing member and the upper connecting portion, and / or between the horizontal opposing member and the lower connecting portion Does not stretch A connecting member is provided.

[0015] According to this method of installing a seismic isolation device, the horizontal counter member and the upper connecting part and / or the horizontal counter member and the lower connecting part are connected by connecting members, which makes it possible to suppress rotation of the horizontal counter member caused by a moment with the lower structure as the reaction point, which is generated by a horizontal external force acting on the upper structure.

[0016] A method for installing such a seismic isolation device, The horizontal opposing member is supported above the lower connecting portion by a connecting member and abuts against the upper connecting portion.

[0017] According to this method of installing a seismic isolation device, the horizontal counter member, supported on the lower connecting part by the connecting member, abuts on the upper connecting part, so that the horizontal counter member abuts on the upper connecting part, and the horizontal counter member and the lower connecting part are supported and connected by the connecting member. This makes it possible to suppress rotation of the horizontal counter member due to a moment with the lower structure as a reaction point, which is generated by a horizontal external force acting on the upper structure.

[0018] A method for installing such a seismic isolation device, In the horizontal counter member installation step, the horizontal counter member is connected to the upper connection portion.

[0019] According to this method of installing a seismic isolation device, the horizontal counter member is connected to the upper connecting portion, so that the horizontal counter member is suspended from the upper connecting portion. Therefore, by suspending the horizontal counter member from the upper connecting portion, the horizontal counter member and the upper connecting portion can be connected.

[0020] A method for installing such a seismic isolation device, In the connecting step, a filler is filled between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion.

[0021] According to this method of installing a seismic isolation device, the horizontal opposing member and the upper connecting portion, and / or the horizontal opposing member and the lower connecting portion can be securely connected by the filled filler material.

[0022] A method for installing such a seismic isolation device, The first upper protrusion and the second upper protrusion each have an upper portion of a pillar and a pillar upper reinforcement portion in which concrete is poured on the outside of the upper portion of the pillar, The first lower protrusion and the second lower protrusion each have a lower part of a pillar and a pillar lower part reinforcement part in which concrete is poured on the outside of the lower part of the pillar, a seismic isolation device installation step of installing a first seismic isolation device between the first upper protrusion and the first lower protrusion, and installing a second seismic isolation device between the second upper protrusion and the second lower protrusion, after the horizontal counter member installation step; a temporary support member installation step of installing temporary support members between the first upper protrusion and the first lower protrusion, and between the second upper protrusion and the second lower protrusion, respectively, before the seismic isolation device installation step, for temporarily supporting the load of the upper structure; A reinforcement portion forming step of forming the column upper reinforcement portion and the column lower reinforcement portion is included before the horizontal counter member installation step and the temporary support member installation step, A temporary support member removal step of removing the temporary support member is included after the seismic isolation device installation step. This method is characterized by having a gap forming process that occurs after the seismic isolation device installation process and before the temporary support member removal process, in which a gap is formed above or below the horizontal opposing member to separate the horizontal opposing member from the upper connecting portion or the lower connecting portion.

[0023] According to this method of installing a seismic isolation device, after the seismic isolation device is installed between the first upper protrusion and the first lower protrusion and between the second upper protrusion and the second lower protrusion, when the temporary support member is removed, a gap is formed above or below the horizontal opposing member, separating the horizontal opposing member from the upper connecting portion or the lower connecting portion.Therefore, when the upper structure is lowered and supported by the seismic isolation device, the horizontal opposing member can be prevented from interfering with the descent of the upper structure.

[0024] A method for installing such a seismic isolation device, The vertical width of the gap is wider than the amount of sinking that occurs when the upper structure is supported by the seismic isolation device and sinks when the temporary support member is removed.

[0025] According to this method of installing a seismic isolation device, when the temporary support members supporting the superstructure are removed and the superstructure is supported by the seismic isolation device, the superstructure sinks lower than its original position. At this time, the vertical width of the gap formed above or below the horizontal opposing member before the seismic isolation device supports the superstructure is wider than the amount of sinking of the superstructure, so the seismic isolation device can more reliably support the superstructure.

[0026] A method for installing such a seismic isolation device, The horizontal opposing member has an upper opposing member and a lower opposing member, In the horizontal opposing member installation step, The upper opposing member is installed along the first direction, and the lower opposing member is installed along the first direction, and the upper opposing member and the lower opposing member are connected by bolts arranged along the vertical direction.

[0027] According to this method for installing a seismic isolation device, the horizontal opposing member is configured so that the upper and lower opposing members are connected by bolts, allowing the horizontal opposing member to be installed even when the vertical distance between the upper and lower connecting parts is large. Furthermore, even if a horizontal external force acting on the upper structure generates a moment with the lower structure as the reaction point, the upper opposing member is not pulled upward, preventing tensile force from acting on the bolts connecting the upper and lower opposing members. This allows the seismic isolation device to be installed more safely between the upper and lower structures.

[0028] Also, a seismic isolation device installation structure having a seismic isolation device between an upper structure and a lower structure, the upper structure having an upper connecting portion including an upper horizontal portion, a first upper protrusion portion and a second upper protrusion portion protruding downward from the upper horizontal portion and spaced apart in a first direction; the lower structure having a lower connecting portion including a lower horizontal portion, a first lower protruding portion and a second lower protruding portion protruding upward from the lower horizontal portion and spaced apart in the first direction; a horizontal resisting member that is installed along the first direction between the first upper protrusion and the second upper protrusion and between the first lower protrusion and the second lower protrusion, and that resists a horizontal external force in the first direction; A connecting member connecting the horizontal opposing member and the upper connecting portion, and the horizontal opposing member and the lower connecting portion. A connecting member that is a member that is vertically expandable and contractible and is installed between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion. and, The present invention relates to an installation structure for a seismic isolation device, characterized by having:

[0029] According to this type of seismic isolation device installation structure, horizontal external forces acting on the superstructure can be transmitted to the substructure via the horizontal counter members, preventing misalignment of the superstructure relative to the substructure and allowing for safe installation. Furthermore, the horizontal counter members can be easily installed along the first direction. Furthermore, bending or buckling of the horizontal counter members is unlikely to occur, increasing the building's resistance to horizontal external forces and allowing for safe installation.

[0030] Furthermore, since the horizontal counter member abuts the upper connecting portion and connects between the horizontal counter member and the upper connecting portion and between the horizontal counter member and the lower connecting portion, it is possible to suppress rotation of the horizontal counter member due to a moment with the lower structure as a reaction point, which is generated by a horizontal external force acting on the upper structure. This makes it possible to install the seismic isolation device more safely between the upper structure and the lower structure. Note that this type of seismic isolation device installation structure also includes structures during the intermediate stages of the seismic isolation device installation method.

[0031] Also, a seismic isolation device installation structure having a seismic isolation device between an upper structure and a lower structure, the upper structure having an upper connecting portion including an upper horizontal portion, a first upper protrusion portion and a second upper protrusion portion protruding downward from the upper horizontal portion and spaced apart in a first direction; the lower structure having a lower connecting portion including a lower horizontal portion, a first lower protruding portion and a second lower protruding portion protruding upward from the lower horizontal portion and spaced apart in the first direction; the seismic isolation devices being installed between a first upper foundation protruding below the first upper protrusion and a first lower foundation protruding above the first lower protrusion, and between a second upper foundation protruding below the second upper protrusion and a second lower foundation protruding above the second lower protrusion, respectively; a horizontal resisting member that is installed along the first direction between the first upper foundation and the second upper foundation and between the first lower foundation and the second lower foundation, and that resists a horizontal external force in the first direction; A connecting member connecting the horizontal opposing member and the upper connecting portion, and the horizontal opposing member and the lower connecting portion. A connecting member that is a member that is vertically expandable and contractible and is installed between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion. and, The present invention relates to an installation structure for a seismic isolation device, characterized by having:

[0032] According to this type of seismic isolation device installation structure, horizontal external forces acting on the superstructure can be transmitted to the substructure via the horizontal counter members, preventing misalignment of the superstructure relative to the substructure and allowing for safe installation. Furthermore, the horizontal counter members can be easily installed along the first direction. Furthermore, bending or buckling of the horizontal counter members is unlikely to occur, increasing the building's resistance to horizontal external forces and allowing for safe installation.

[0033] Furthermore, since the horizontal counter member abuts the upper connecting portion and connects between the horizontal counter member and the upper connecting portion and between the horizontal counter member and the lower connecting portion, it is possible to suppress rotation of the horizontal counter member due to a moment with the lower structure as a reaction point, which is generated by a horizontal external force acting on the upper structure. This makes it possible to install the seismic isolation device more safely between the upper structure and the lower structure. Note that this type of seismic isolation device installation structure also includes structures during the intermediate stages of the seismic isolation device installation method. [Effects of the Invention]

[0034] According to the present invention, the construction of a seismic isolation device can be easily carried out, while the resistance to horizontal external forces acting on the building during construction is increased, allowing for safe construction. [Brief explanation of the drawings]

[0035] [Figure 1] FIG. 2 is a flow chart showing the steps of the installation method for the seismic isolation device of the first embodiment. [Figure 2] FIG. 10 is an explanatory diagram of a reinforcing portion forming step. [Figure 3] 3A and 3B are explanatory views of a temporary support member installation step and a horizontal opposing member installation step. [Figure 4] 4A to 4C are explanatory diagrams of the horizontal opposing member group 60. FIG. [Figure 5] FIG. [Figure 6] An explanatory diagram of the cutting process of the pillar 2. [Figure 7] 10 is an explanatory diagram of the installation process of the seismic isolation device 30. FIG. [Figure 8] FIG. [Figure 9] This is a front view of the existing building 1 after the removal process. [Figure 10] FIG. 1 is a schematic plan view of an existing building 1. [Figure 11] 11A and 11B are explanatory diagrams of modified examples of the horizontal opposing member group 60. FIG. [Figure 12] 12A and 12B are explanatory views of a temporary support member installation step and a horizontal opposing member installation step according to the second embodiment. [Figure 13] 13A to 13C are explanatory diagrams of a method for installing a group of horizontal opposing members 60 in the second embodiment. [Figure 14] FIG. 10 is a flow chart showing the steps of a method for installing a seismic isolation device according to a third embodiment. [Figure 15] FIG. 15A is an explanatory diagram of the pillar cutting process, and FIG. 15B is an explanatory diagram of the seismic isolation device installation process. [Figure 16] FIG. 11 is an explanatory diagram of a horizontal opposing member installation step in the third embodiment. [Figure 17] FIG. 17A is an explanatory diagram of another pillar (2D) cutting process, and FIG. 17B is an explanatory diagram of another seismic isolation device installation process. [Figure 18] 18A to 18D are schematic plan views of the existing building 1. FIG.

Embodiment for Carrying out the Invention

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings. ===First Embodiment=== <<S01: Reinforcement Part Forming Step>> FIG. 1 is a flowchart showing the procedure of the installation method of the seismic isolation device according to the first embodiment. FIG. 2 is an explanatory view of the reinforcement part forming step, and FIG. 3 is a front view of the reinforced existing building 1. In the following embodiments, an installation method of a seismic isolation device applied to a seismic isolation construction in which an existing column is cut and a seismic isolation device is installed at the cut part to make it seismic isolated will be described as an example.

[0037] In the installation method of the seismic isolation device according to the first embodiment, the existing building 1 is separated into an upper structure 10 and a lower structure 20, and a seismic isolation device 30 (for example, a laminated rubber type, a rolling bearing type, a sliding bearing type, etc.) is installed therebetween. Specifically, a part of the column 2 on the intermediate floor of the existing building 1 is cut (here, a part of the column 2 extending in the vertical direction from the floor surface FL1 of the first floor above ground to the floor surface FL2 of the second floor above ground is cut), and the seismic isolation device 30 is installed at the cut location. In the first embodiment, as shown in FIG. 9 to be described later, two columns 2A and 2B arranged at intervals in the X direction (horizontal direction, first direction) are used as the columns for installing the seismic isolation device 30.

[0038] First, in order to separate the existing building 1 vertically and install the seismic isolation device 30, a reinforcement part 40 is formed to reinforce the existing building 1 for the purpose of supplementing the strength and rigidity of the existing building 1. For example, concrete is placed to raise the floor surface of the floor where the seismic isolation device 30 is installed, thicken the column 2, or thicken the beam 3. In FIG. 2, the portion shaded in the lower right is taken as the reinforcement part 40. However, if there is no need to reinforce the existing building 1, the reinforcement part forming step is unnecessary.

[0039] In the first embodiment, at least, a column upper reinforcement part 41 reinforced by placing concrete on the outer side of the upper part of the columns 2A and 2B to be constructed, and a column lower reinforcement part 42 reinforced by placing concrete on the outer side of the lower part of the columns 2A and 2B to be constructed are formed.

[0040] Further, among the existing building 1, the portion above the installation position of the seismic isolation device 30 is defined as the upper structure 10, and the portion below the installation position of the seismic isolation device 30 is defined as the lower structure 20. The upper structure 10 includes an upper horizontal portion 11 (the portion above the lower surface of the reinforcement portion 40 of the beam 3), and a first upper protruding portion 12 and a second upper protruding portion 13 that protrude downward from the upper horizontal portion 11 and are arranged at intervals in the X direction, and has an upper connecting portion including these. The first upper protruding portion 12 and the second upper protruding portion 13 each have an upper portion of the column 2 and a column upper reinforcement portion 41 (a part of which) where concrete is placed outside the upper portion of the column 2.

[0041] The lower structure 20 includes a lower horizontal portion 21 (the portion below the reinforced floor surface FL1), and a first lower protruding portion 22 and a second lower protruding portion 23 that protrude upward from the lower horizontal portion 21 and are arranged at intervals in the X direction, and has a lower connecting portion including these. The first lower protruding portion 22 and the second lower protruding portion 23 each have a lower portion of the column 2 and a column lower reinforcement portion 42 where concrete is placed outside the lower portion of the column 2.

[0042] In addition, when forming the column upper reinforcement portion 41 and the column lower reinforcement portion 42, the joint 43 when installing the seismic isolation device 30 may be buried in the column upper reinforcement portion 41 and the column lower reinforcement portion 42 in advance. Further, PC steel bars 44 may be inserted through the column upper reinforcement portion 41 and the upper portions of the columns 2A and 2B, etc., and both ends of the PC steel bars 44 may be fastened with nuts to apply prestress. Thus, the tensile strength of the column upper reinforcement portion 41 may be increased.

[0043] <<S02: Temporary support member installation process, horizontal countermeasure member installation process, and connection process>> FIGS. 3A and 3B are explanatory views of the temporary support member installation process and the horizontal countermeasure member installation process. FIG. 3A is a front view of the existing building 1, and FIG. 3B is a schematic plan view of the existing building 1 as viewed from above. FIGS. 4A to 4C are explanatory views of the horizontal countermeasure member group 60. FIG. 4A is a front view of the horizontal countermeasure member group 60, FIG. 4B is a side view of the horizontal countermeasure member group 60 as viewed from one side in the X direction, and FIG. 4C is a plan view of the horizontal countermeasure member group 60 as viewed from above. FIG. 5 is an explanatory view of the connection process.

[0044] Next, a temporary support member installation process is carried out to install temporary support members 50 around the columns 2A, 2B to be worked on. That is, temporary support members 50 are installed between the first upper protrusion 12 (column upper reinforcement 41A) and the first lower protrusion 22 (column lower reinforcement 42A), and between the second upper protrusion 13 (column upper reinforcement 41B) and the second lower protrusion 23 (column lower reinforcement 42B). The temporary support members 50 are used to temporarily support the load of the superstructure 10 after the columns 2 are cut, and are members (such as hydraulic jacks) that can be extended and contracted in the vertical direction.

[0045] After the temporary support members 50 are installed on the column lower reinforcements 42A and 42B, the temporary support members 50 are extended vertically upward to the column upper reinforcements 41A and 41B. At this time, each temporary support member 50 is installed so as not to protrude outward beyond the outer peripheral edges of the column upper reinforcements 41A and 41B and the column lower reinforcements 42A and 42B. The temporary support members 50 are then brought into contact with the undersides of the column upper reinforcements 41A and 41B and the upper sides of the column lower reinforcements 42A and 42B. In this way, after the column 2 is cut, the load of the superstructure 10 is transmitted to the substructure 20 while being supported by the temporary support members 50. Note that, although FIG. 3B shows four temporary support members 50 installed for one column 2, this is not a limitation.

[0046] Next, a horizontal opposing member installation process is carried out to install a group of horizontal opposing members 60 in the space between the columns 2A and 2B to be constructed. The group of horizontal opposing members 60 are members for resisting horizontal external forces in the X direction acting on the existing building 1. The group of horizontal opposing members 60 in the first embodiment includes upper opposing members 61 and lower opposing members 62, which are horizontal opposing members, and a connecting member 63. Here, earth retaining members 611, 621 and piece members 612, 622 are used as the upper opposing members 61 and the lower opposing members 62, respectively, and an earth retaining member is used as the connecting member 63.

[0047] The earth retaining member (e.g., earth retaining member 611) is a steel material in the form of an H-beam with both ends closed by end plates, and can be exemplified by a member having a pair of flanges (611A), a web (611B), a pair of end plates (611C), a planar, approximately triangular auxiliary plate (611D) fixed to the web, and a through hole (611E) for inserting a fastener such as a bolt. The piece member is a member with a shorter length than the earth retaining member, and can be exemplified by a member having a pair of flanges, a web, a pair of end plates, an auxiliary plate, and a through hole, similar to the earth retaining member. The upper opposing member 61 and the lower opposing member 62 of this embodiment are members in which the earth retaining members 611, 621 and the piece members 612, 622 are joined by bolts or the like with their end plates abutting against each other.

[0048] 3A, the connecting member 64 is placed on the lower horizontal portion 21, and the lower opposing member 62, three connecting members 63, and upper opposing member 61 are stacked on top of it in this order and joined together using bolts 66, nuts 67, and washer plates 68, thereby forming the horizontal opposing member group 60 on the connecting member 64. At this time, the connecting members 64 are placed below the vicinities of both ends in the X direction of the lower opposing member 62 that is located at the bottom of the horizontal opposing member group 60.

[0049] In the first embodiment, a member that can be extended and retracted in the vertical direction (for example, a giraffe jack, etc.) is used as the connecting member 64. Unlike a hydraulic jack or the like that forms the temporary support member 50 that temporarily supports the load of the superstructure 10, this connecting member 64 is a device that can be manually extended and retracted in the vertical direction. Note that the connecting member 64 does not necessarily have to be an extendable member.

[0050] Then, from the state in which the group of horizontal opposing members 60 is supported by the connecting member 64 installed on the lower horizontal portion 21, the connecting member 64 is extended to lift up the group of horizontal opposing members 60 and bring the upper opposing member 61 into contact with the upper horizontal portion 11.

[0051] In detail, it is placed on a connecting member 64 installed on the lower horizontal portion 21, and the end face 62a (end plate of the retaining member 621) on one side of the X direction of the lower opposing member 62 is abutted against the side face 22a of the first lower protrusion 22 (lower column reinforcement portion 42A), and the end face 62b (end plate of the piece material 622) on the other side of the X direction of the lower opposing member 62 is abutted against the side face of the second lower protrusion 23 (lower column reinforcement portion 42B).

[0052] Next, the three connecting members 63 are stacked in order on top of the lower opposing member 62 and joined with bolts 66, nuts 67, and washer plates 68. Each connecting member 63 (retaining member) is also installed horizontally or approximately horizontally so that its longitudinal direction is along the X direction. Specifically, vertically adjacent retaining members (the upper opposing member 61 and the top connecting member 63, the second and third connecting members 63 from the top, and the third connecting member 63 from the top and the lower opposing member 62) are joined with bolts 66, nuts 67, and washer plates 68 with their flange surfaces abutting each other.

[0053] Next, the upper opposing member 61 is placed on the stacked connecting members 63, and an end face 61a (end plate 611C of the retaining member 611) on one side in the X direction of the upper opposing member 61 is brought into contact with the side face 12a of the first upper protruding portion 12 (upper column reinforcement portion 41A), and an end face 61b (end plate of the piece material 612) on the other side in the X direction of the upper opposing member 61 is brought into contact with the side face 13a of the second upper protruding portion 13 (upper column reinforcement portion 41B). At this time, there is a gap between the upper opposing member 61 and the underside of the upper horizontal portion 11 in the vertical direction.

[0054] That is, horizontal opposing members (upper opposing member 61 and lower opposing member 62) are installed horizontally or approximately horizontally along the X direction between the first upper protrusion 12 and the second upper protrusion 13 and between the first lower protrusion 22 and the second lower protrusion 23. In the first embodiment, the upper opposing member 61 is installed between the first upper protrusion 12 and the second upper protrusion 13 (between the column upper reinforcements 41A and 41B) with its longitudinal direction along the X direction. In addition, the lower opposing member 62 is installed between the first lower protrusion 22 and the second lower protrusion 23 (between the column lower reinforcements 42A and 42B) with its longitudinal direction along the X direction.

[0055] Next, a connecting step is carried out in which the horizontal opposing member group 60 is pulled upward using the upper surface of the lower horizontal section 21 as a reaction surface, and the upper opposing member 61 abuts against the upper horizontal section 11. In the connecting step, the horizontal opposing member group 60 is pulled up using a lever block (registered trademark) or a chain block, and the connecting member 64 is made to follow and extend. In this way, the horizontal opposing member group 60 is pulled upward, and the upper surface of the upper opposing member 61 abuts (connects) against the lower surface of the upper horizontal section 11.

[0056] Therefore, when the end face 61a on one side of the X direction of the upper opposing member 61 is abutted against the side face 12a of the first upper protrusion 12 and the end face 61b on the other side of the X direction of the upper opposing member 61 is abutted against the side face 13a of the second upper protrusion 13, even if there is a vertical gap between the upper flange 611A of the upper opposing member 61 and the underside of the upper horizontal portion 11, the horizontal opposing member group 60 is pushed up by the connecting member 64, so that the upper surface of the upper opposing member 61 is reliably abutted (connected) against the underside of the upper horizontal portion 11.

[0057] In this embodiment, a filler 65 (e.g., grout) is filled between the end face 61b on the other side in the X direction of the upper opposing member 61 and the side face 13a of the second upper protruding portion 13. At this time, the filler 65 is filled in, for example, a vinyl bag or the like and interposed between the end face 61b and the side face 13a of the second upper protruding portion 13. In this case, the end face 61b on the other side in the X direction of the upper opposing member 61 abuts against the side face 13a of the second upper protruding portion 13 via the filler 65 filled in the vinyl bag or the like. Similarly, in this embodiment, the filler 65 is filled between the end face 62b on the other side in the X direction of the lower opposing member 62 and the side face 23a of the second lower protruding portion 23. At this time, the filler 65 is filled in, for example, a vinyl bag or the like and interposed between the end face 62b and the side face 23a of the second lower protruding portion 23. In this case, the end surface 62b on the other side in the X direction of the lower opposing member 62 abuts against the side surface 23a of the second lower protruding portion 23 via a filler 65 filled in a vinyl bag or the like.

[0058] Note that the filler 65 can be filled on either side of the upper counter member 61 and the lower counter member 62 in the X direction, or can be filled on both sides in the X direction. Also, by filling the filler 65 or the like, the steps of connecting the end faces 61a, 61b of the upper counter member 61 to the side face 12a of the first upper protruding portion 12 and / or the side face 13a of the second upper protruding portion 13, and connecting the end faces 62a, 62b of the lower counter member 62 to the side face 22a of the second lower protruding portion 22 and / or the side face 23a of the second lower protruding portion 23 may be performed before or after the upper counter member 61 is abutted (connected) to the upper horizontal portion 11.

[0059] Note that the horizontal counter member group 60 may be formed by joining the lower counter member 62, the three connecting members 63, and the upper counter member 61 in advance. In this case, for the horizontal counter member group 60, any of its constituent members 61 to 63 may be installed first, or the constituent members 61 to 63 may be joined first and then installed. Also, for the temporary support member installation step, the horizontal counter member installation step, and the connection step, as long as the connection step is performed after the horizontal counter member installation step, any of the other steps may be performed first or simultaneously.

[0060] <S03: Column Cutting Process> FIG. 6 is an explanatory diagram of the cutting process of the column 2 and a front view of the existing building 1. Next, a part of the columns 2A and 2B to be constructed is cut and removed to form an installation space for the seismic isolation device 30. Then, a part of the load of the upper structure 10 supported by the columns 2A and 2B is transferred to the temporary support member 50. In the first embodiment, the part of the columns 2A and 2B between the upper column reinforcement parts 41A and 41B and the lower column reinforcement parts 42A and 42B is cut.

[0061] <S04: Seismic Isolation Device Installation Process> FIG. 7 is an explanatory view of the installation process of the seismic isolation device 30 and is a front view of the existing building 1. In the seismic isolation device installation process, first, lower foundations 31 are respectively formed on the lower column reinforcement parts 42A and 42B. For example, according to the shape of the lower foundation 31, reinforce bars and a formwork (not shown) are assembled, and concrete is placed to form the lower foundation 31. At this time, it is advisable to place the concrete with the base plate for installing the seismic isolation device 30 arranged. Also, it is advisable to connect the reinforce bars and the like embedded in the lower foundation 31 to the joints 43 embedded during the formation of the lower column reinforcement parts 42A and 42B. In FIG. 7, the lower foundation on one side in the X direction is defined as the first lower foundation 31A having the first lower protrusion 22, and the lower foundation on the other side in the X direction is defined as the second lower foundation 31B having the second lower protrusion 23.

[0062] Next, the seismic isolation device 30 (the first seismic isolation device 30A) is installed on the first lower foundation 31A, and the seismic isolation device 30 (the second seismic isolation device 30B) is installed on the second lower foundation 31B. For example, the lower part of the seismic isolation device 30 is fixed to the base plate integrated with the lower foundation 31 with bolts or the like. Then, upper foundations 32 are respectively formed between the first seismic isolation device 30A and the upper column reinforcement part 41A, and between the second seismic isolation device 30B and the upper column reinforcement part 41B. Similar to the lower foundation 31, according to the shape of the upper foundation 32, reinforce bars and a formwork (not shown) are assembled, and the concrete is placed with the base plate arranged to form the upper foundation 32. Then, the upper part of the seismic isolation device 30 is fixed to the base plate integrated with the upper foundation 32 with bolts or the like. In FIG. 7, the upper foundation on one side in the X direction is defined as the first upper foundation 32A having the first upper protrusion 12, and the upper foundation on the other side in the X direction is defined as the second upper foundation 32B having the second upper protrusion 13.

[0063] Thereby, the installation of the seismic isolation device 30 is completed. The seismic isolation device 30 is fixed to the upper part of the column 2 via the upper foundation 32 and is fixed to the lower part of the column 2 via the lower foundation 31, and can follow the movement of the column 2. Also, the seismic isolation device 30 can transmit the load of the superstructure 10 to the substructure 20 while supporting it.

[0064] <S05: Void formation process> 8 is an explanatory diagram of the gap forming process, and is a front view of the existing building 1. In the gap forming process, the horizontal opposing member group 60 is moved downward to form a gap S between the upper surface of the upper opposing member 61 and the lower surface of the upper horizontal section 11. More specifically, the connecting member 64 arranged below the horizontal opposing member group 60 is contracted downward, and the horizontal opposing member group 60 is lowered to form a gap S between the upper surface of the upper opposing member 61 and the lower surface of the upper horizontal section 11.

[0065] At this time, after the horizontal opposing member group 60 is lowered, the vertical width W of the gap S formed between the upper surface of the upper opposing member 61 and the lower surface of the upper horizontal portion 11 is formed to be wider than the amount of sinking L of the upper structure 10 when the load of the upper structure 10, supported by the temporary support members 50, is changed from a state in which the load of the upper structure 10 is supported by the temporary support members 50 to a state in which the load of the upper structure 10 is supported by the seismic isolation device 30 after the temporary support members 50 are removed. Here, the amount of sinking L of the upper structure 10 is represented, for example, by the difference between the distance L1 between the upper horizontal portion 11 and the lower horizontal portion 21 when the upper structure 10 is supported by the temporary support members 50 and the distance L2 between the upper horizontal portion 11 and the lower horizontal portion 21 when the upper structure 10 is supported by the seismic isolation device 30.

[0066] When the load of the superstructure 10 is supported by the temporary support members 50, and then the temporary support members 50 are removed and the load of the superstructure 10 is supported by the seismic isolation device 30, the amount of subsidence L of the superstructure 10 varies depending on the type of seismic isolation device 30. For example, if the seismic isolation device 30 is a laminated rubber type, the amount of subsidence is approximately 2 mm to 5 mm, and if it is a rolling bearing type or a sliding bearing type, the amount of subsidence is approximately 1 mm to 2 mm. For this reason, the vertical width W of the gap S formed in the gap formation process is set to, for example, the expected amount of subsidence + 5 mm.

[0067] Even after forming the gap S between the upper surface of the upper opposing member 61 and the lower surface of the upper horizontal portion 11, at least a part of the end face 61a on one side in the X direction of the upper opposing member 61 and the side face 12a of the first upper protruding portion 12 face each other in the horizontal direction, and a part of the end face 61b on the other side in the X direction of the upper opposing member 61 and the side face 13a of the second upper protruding portion 13 face each other in the horizontal direction. The gap S is formed such that the upper opposing member 61 is disposed at a position where they face each other.

[0068] For example, after forming the gap S, the vertical width of the horizontal opposing member group 60 that faces the first upper protruding portion 12 and the second upper protruding portion 13, before forming the gap S, is the vertical width of the horizontal opposing member group 60 that faced the first upper protruding portion 12 and the second upper protruding portion 13. That is, in the present embodiment, at both end faces 61a, 61b of the horizontal opposing member 61 provided with the gap S between it and the upper horizontal portion 11, the area of the portions facing the side face 12a of the first upper protruding portion 12 and the side face 13a of the second upper protruding portion 13 may be any area as long as it can obtain the bearing strength that the first upper protruding portion 12 and the second upper protruding portion 13 can withstand against the horizontal external force transmitted to the first upper protruding portion 12 and the second upper protruding portion 13 by the horizontal opposing member 61.

[0069] <S06: Removal process> FIG. 9 is a front view of the existing building 1 after the removal process. The removal process S06 includes a temporary support member removal process and a horizontal opposing member removal process. After installing the seismic isolation device 30 and confirming that the seismic isolation device 30 functions properly, the temporary support member 50 is contracted and removed (temporary support member removal process). Then, the load of the superstructure 10 is transferred from the temporary support member 50 to the seismic isolation device 30. Even after the load of the superstructure 10 is transferred from the temporary support member 50 to the seismic isolation device 30, the gap S is ensured between the upper surface of the upper opposing member 61 and the lower surface of the upper horizontal portion 11.

[0070] Then, after removing the temporary support members 50 from all of the columns 2, the horizontal opposing member group 60 is removed (horizontal opposing member removal process). By doing so, even while the temporary support members 50 are being removed, the strength against horizontal external forces acting on the building can be increased, allowing for safe construction.

[0071] <<The effectiveness of the seismic isolation device installation method>> As described above, in the seismic isolation device installation method of the first embodiment (FIG. 3A), horizontal resisting members 61, 62 that resist horizontal external forces in the X direction are installed along the X direction between the first upper protrusion 12 and the second upper protrusion 13, and between the first lower protrusion 22 and the second lower protrusion 23. Therefore, the seismic isolation device installation structure shown in FIG. 7 is formed during the seismic isolation device installation method, allowing for safe installation.

[0072] In more detail, an upper opposing member 61 is installed along the X direction between the first upper protrusion 12 and the second upper protrusion 13, and a lower opposing member 62 is installed along the X direction between the first lower protrusion 22 and the second lower protrusion 23, and the upper opposing member 61 and the lower opposing member 62 are connected. Therefore, even if an earthquake or strong wind occurs during construction when pillars and walls are being cut, the horizontal opposing members 61 and 62 can suppress positional deviation of the upper structure 10 in the X direction relative to the substructure 20, allowing for safe construction.

[0073] Specifically, when a horizontal external force acting on the upper structure 10 toward the other side in the X direction is applied, the horizontal external force is resisted by the first upper protrusion 12 with which an end face on one side in the X direction of the upper opposing member 61 abuts, and is transmitted to the lower opposing member 62 connected to the upper opposing member 61. The transmitted horizontal external force is resisted by the second lower protrusion 23 with which an end face on the other side in the X direction of the lower opposing member 62 abuts. Therefore, movement of the upper structure 10 toward the other side in the X direction is restricted, and positional deviation of the upper structure 10 in the X direction relative to the lower structure 20 can be suppressed.

[0074] Similarly, in the opposite direction, when a horizontal external force acts on the upper structure 10 toward one side in the X direction, the horizontal external force is resisted by the second upper protrusion 13 with which the end face on the other side in the X direction of the upper opposing member 61 abuts, and is transmitted to the lower opposing member 62 connected to the upper opposing member 61. The transmitted horizontal external force is resisted by the first lower protrusion 22 with which the end face on one side in the X direction of the lower opposing member 62 abuts. Therefore, movement of the upper structure 10 toward one side in the X direction is restricted, and positional deviation of the upper structure 10 in the X direction relative to the lower structure 20 can be suppressed.

[0075] Furthermore, the upper opposing member 61 and the lower opposing member 62 of this embodiment are installed horizontally or approximately horizontally along the X direction, and are subjected to forces along their respective longitudinal axes. Therefore, compared to the case where opposing members are installed diagonally with respect to the X direction, unlike this embodiment, the building 1 has a higher resistance to horizontal external forces, and bending or buckling is less likely to occur in the upper opposing member 61 and the lower opposing member 62. This eliminates the need to install an unnecessarily large number of opposing members, making construction easier.

[0076] Furthermore, the group of horizontal opposing members 60 abuts against the upper horizontal portion 11 and connects between the upper opposing member 61 and the upper horizontal portion 11 and between the lower opposing member 62 and the lower horizontal portion 21, so that rotation of the group of horizontal opposing members 60 due to a moment generated by a horizontal external force acting on the upper structure 10 and with the lower structure 20 as the reaction point can be suppressed.

[0077] Specifically, an upper opposing member 61 installed between the first upper protrusion 12 and the second upper protrusion 13 and a lower opposing member 62 installed between the first lower protrusion 22 and the second lower protrusion 23 are connected via three connecting members 63. In other words, the upper opposing member 61 and the lower opposing member 62 are arranged at positions spaced apart in the vertical direction.

[0078] When a horizontal external force acting on the upper structure 10 toward the other side in the X direction is applied, the horizontal external force is resisted by the first upper protrusion 12 with which an end face on one side in the X direction of the upper opposing member 61 abuts, and is transmitted to the lower opposing member 62 connected to the upper opposing member 61. The transmitted horizontal external force is resisted by the second lower protrusion 23 with which an end face on the other side in the X direction of the lower opposing member 62 abuts. At this time, because the upper opposing member 61 and the lower opposing member 62 are disposed apart in the vertical direction, a clockwise moment is generated with the second lower protrusion 23 with which the end face on the other side in the X direction of the lower opposing member 62 abuts as a reaction point.

[0079] Similarly, in the opposite direction, when a horizontal external force acts on the upper structure 10 toward one side in the X direction, the horizontal external force is resisted by the first upper protrusion 12 with which the end face of the upper opposing member 61 on the other side in the X direction abuts, and is transmitted to the lower opposing member 62 connected to the upper opposing member 61. The transmitted horizontal external force is resisted by the second lower protrusion 23 with which the end face of the lower opposing member 62 on one side in the X direction abuts. At this time, because the upper opposing member 61 and the lower opposing member 62 are disposed apart in the vertical direction, a counterclockwise moment is generated with the second lower protrusion 23 with which the end face of the lower opposing member 62 on one side in the X direction abuts as the reaction point.

[0080] In this way, when a horizontal external force acts on the superstructure 10 and a moment is generated, for example, if there is a gap between at least one of the upper surface of the upper opposing member 61 and the lower surface of the upper horizontal section 11 and between the lower surface of the lower opposing member 62 and the upper surface of the lower horizontal section 21, the moment will pull one or the other end of the upper opposing member 61 upward, and tension will act on the bolts 66 connecting the upper opposing member 61, the lower opposing member 62, and the three connecting members 63. For this reason, if there is a gap between the upper surface of the upper opposing member 61 and the lower surface of the upper horizontal section 11, and between the lower surface of the lower opposing member 62 and the upper surface of the lower horizontal section 21, it is necessary to take into consideration the tension acting on the bolts 66 when a moment is applied, and in order to provide the desired resistance strength of the horizontal restraint, more bolts 66 will have to be used to connect the upper opposing member 61, the lower opposing member 62, and the three connecting members 63.

[0081] In contrast, in this embodiment, the horizontal opposing member group 60 is connected to both the upper horizontal portion 11 and the lower horizontal portion 21 by the connecting member 64. Therefore, even if a horizontal external force acting toward the other side in the X direction acts on the upper structure 10 and generates a moment with the second lower protrusion 23 as a reaction point, the rotation of the upper opposing member 61 is restricted by the upper structure 10. As a result, one end of the upper opposing member 61 is not pulled upward or downward, preventing tension from acting on the bolts 66 connecting the upper opposing member 61, the lower opposing member 62, and the three connecting members 63. This increases the horizontal restraint strength regardless of the tensile strength of the bolts 66. Therefore, the number of bolts 66 can be reduced compared to when a gap is provided between the top surface of the upper opposing member 61 and the bottom surface of the upper horizontal portion 11 or between the bottom surface of the lower opposing member 62 and the top surface of the lower horizontal portion 21, thereby facilitating construction and reducing costs.

[0082] Furthermore, after the horizontal opposing member installation process, in the connection process, the upper opposing member 61 of the horizontal opposing member group 60 arranged along the X direction is abutted against the upper horizontal portion 11, so that the upper opposing member 61 installed between the first upper protrusion 12 and the second upper protrusion 13 can be reliably abutted against the upper horizontal portion 11 and downward displacement can be prevented.

[0083] Furthermore, after the seismic isolation device installation process and before the temporary support member removal process, a gap S is formed above the upper opposing member 61 to separate the upper opposing member 61 from the upper horizontal portion 11, so that when the temporary support member 50 is removed, the upper structure 10 is lowered, and the upper structure 10 is supported by the seismic isolation device 30, the group of horizontal opposing members 60 can be prevented from interfering with the descent of the upper structure 10.

[0084] Furthermore, when the temporary support members 50 supporting the upper structure 10 are removed and the upper structure 10 is supported by the seismic isolation device 30, the upper structure 10 sinks lower than its original position when supported by the temporary support members 50. At this time, the vertical width W of the gap S formed above the upper opposing member 61 is set wider than the amount of sinking L (L1-L2) of the upper structure 10 being supported by the seismic isolation device 30 when the temporary support members 50 are removed, so that the load of the upper structure 10 can be reliably supported by the seismic isolation device 30 when the temporary support members 50 are removed.

[0085] Furthermore, by arranging at least a portion of the upper opposing member 61 facing the first upper protrusion 12 and the second upper protrusion 13 in the horizontal direction after creating a gap S between the upper opposing member 61 and the upper horizontal portion 11, even if a horizontal external force acts on the upper structure 10 after creating the gap S, the horizontal external force can be transmitted to the lower structure 20 via the group of horizontal opposing members 60, thereby preventing the upper structure 10 from shifting position relative to the lower structure 20 and allowing for safe construction.

[0086] Furthermore, after the gap S is formed between the upper opposing member 61 and the upper horizontal portion 11, the area of the portion of the upper opposing member 61 facing the first upper protrusion 12 and the second upper protrusion 13 is set to an area that provides the first upper protrusion 12 and the second upper protrusion 13 with the bearing strength to withstand the horizontal external force transmitted to the first upper protrusion 12 and the second upper protrusion 13 by the upper opposing member 61. Therefore, even if a horizontal external force acts on the upper structure 10 after the gap S is formed, the first upper protrusion 12 and the second upper protrusion 13 will not be damaged by the horizontal external force. Therefore, the horizontal external force can be more reliably transmitted to the substructure 20 via the horizontal opposing member group 60, and displacement of the upper structure 10 relative to the substructure 20 can be suppressed, allowing for safe construction.

[0087] Furthermore, the group of horizontal opposing members 60, consisting of the upper opposing member 61, the lower opposing member 62, and the multiple connecting members 63 connecting the upper opposing member 61 and the lower opposing member 62, are each connected by bolts 66 arranged along the vertical direction.Therefore, even if the vertical distance between the first upper protrusion 12 and the first lower protrusion 22 is even larger, the horizontal external force acting on the upper structure 10 can be transmitted to the lower structure 20 by the horizontal opposing members 61, 62 and the connecting members 63, thereby preventing the upper structure 10 from shifting out of position.

[0088] Furthermore, even if a moment is generated with the lower structure 20 as the reaction point due to a horizontal external force acting on the upper structure 10, the upper opposing member 61 is in contact with the upper horizontal section 11, and the lower opposing member 62 is in contact with the lower horizontal section 21, so the members of the horizontal opposing member group 60 are not pulled in the vertical direction. This prevents tensile force from acting on the bolts 66 connecting the upper opposing member 61, the lower opposing member 62, and the connecting member 63. This allows the seismic isolation device 30 to be installed more safely between the upper structure 10 and the lower structure 20.

[0089] Furthermore, unlike the present embodiment, when installing opposing members diagonally with respect to the X direction, it is necessary to drive many anchors into the columns, beams, floors, etc. of the existing building, attach gusset plates, and install the opposing members diagonally between the gusset plates, which makes construction complicated. In contrast, in the present embodiment, both end faces in the X direction of the upper opposing member 61 abut against the side faces of the first and second upper protruding portions 12 and 13, both end faces in the X direction of the lower opposing member 62 abut against the side faces of the first and second lower protruding portions 22 and 23, and the top face of the upper opposing member 61 abuts against the upper horizontal portion 11, and the horizontal opposing member group 60 is simply supported by the connecting member 64 arranged on the lower horizontal portion 21, which makes construction easier.

[0090] In other words, according to the seismic isolation device installation method of this embodiment, the seismic isolation device installation work can be carried out easily while increasing the resistance to horizontal external forces acting on the building during installation, thereby enabling safe installation.

[0091] The horizontal opposing members 61, 62 are not limited to the earth retaining members 611, 621, but may be any members (for example, steel members or precast concrete members) that are elongated in the X direction (first direction) and have surfaces at both ends in the X direction that can abut against the side surfaces of the first upper protrusion 12, etc. As in this embodiment, depending on the interval at which the horizontal opposing members 61, 62 are installed, general-purpose earth retaining members 611, 621 joined to piece members 612, 622 may be used, or the general-purpose earth retaining members 611, 621 may be used alone. Using general-purpose earth retaining members 611, 621 reduces construction costs.

[0092] Furthermore, the number of upper opposing members 61 abutting the side surfaces of the first and second upper protrusions 12 and 13 is not limited to one, but may be multiple members connected together. Similarly, the number of lower opposing members 62 abutting the side surfaces of the first and second lower protrusions 22 and 23 is not limited to one, but may be multiple members connected together. In this case, the upper opposing members 61 and the lower opposing members 62 may be connected together via a connecting member installed along the X direction (first direction). Also, although only one row of horizontal opposing members (61, 62) is shown in FIG. 4C, the horizontal opposing members (61, 62) may be arranged in multiple rows aligned in the Y direction.

[0093] FIG. 10 is a schematic plan view of an existing building 1. While the installation of horizontal opposing members 61, 62 along the X direction has been described above as an example, the horizontal opposing members 61, 62 of this embodiment can also be installed along a horizontal direction intersecting the X direction. For example, as shown in FIG. 10 , a horizontal opposing member group 60 can be installed between two columns 2A, 2C spaced apart in the Y direction (the first direction in this case) perpendicular to the X direction. This can prevent misalignment of the superstructure 10 in the Y direction relative to the substructure 20 during construction after the columns and walls are cut. In FIG. 10 , the horizontal opposing member group 60 that resists horizontal external forces in the X direction is labeled 60X, and the horizontal opposing member group 60 that resists horizontal external forces in the Y direction is labeled 60Y. As shown in FIG. 10 , installing the horizontal opposing member groups 60 along the X and Y directions, respectively, can prevent misalignment of the superstructure 10 in the X and Y directions.

[0094] Note that it is not necessary to install horizontal counter-member groups 60 in the spaces between all of the target columns 2 (columns 2 to be cut) and the adjacent columns 2. As long as safe construction is possible, it is not necessary to install horizontal counter-member groups 60 around some of the columns 2, as shown in FIG. 10 . Generally, when the bearing strength of the counter-members in the X direction (e.g., horizontal counter-member group 60X) and the counter-members in the Y direction (e.g., horizontal counter-member group 60Y) is approximately the same, it is advisable to install the same number of counter-members in the X and Y directions. Furthermore, displacement of the superstructure 10 due to horizontal external forces can also be suppressed by using a bearing wall (not shown) or an exterior wall before cutting, or by fastening the cut walls with steel plates, prestressing steel members, bolts, etc.

[0095] In addition, in the first embodiment, two members (an upper opposing member 61 and a lower opposing member 62) are installed as horizontal opposing members. By doing so, even when the vertical distance between the first upper protrusion 12 and the first lower protrusion 22 is relatively large, the horizontal opposing members 61, 62 can transmit the horizontal external force acting on the upper structure 10 to the lower structure 20, and displacement of the upper structure 10 can be suppressed.

[0096] Furthermore, similarly to the horizontal opposing members 61 and 62, by installing the connecting member 63 horizontally or approximately horizontally along the X direction, it is possible to suppress the occurrence of bending or buckling of the connecting member 63 and to efficiently transmit the horizontal external force acting on the superstructure 10. Furthermore, the installation of the connecting member 63 is also made easier.

[0097] 11A and 11B are explanatory diagrams of modified examples of the horizontal opposing member group 60. Without being limited to the above, the configuration of the horizontal opposing member group 60 may be changed when the vertical distance between the first upper protrusion 12 and the first lower protrusion 22 is narrow. For example, as shown in FIG. 11A, an upper opposing member 61 and a lower opposing member 62 installed along the X direction may be directly connected by a bolt or the like (not shown) without using a connecting member 63.

[0098] 11B, one horizontal opposing member 69 may be installed between the first upper protrusion 12 and the second upper protrusion 13 and between the first lower protrusion 22 and the second lower protrusion 23. In this case, the end face on one side in the X direction of the horizontal opposing member 69 abuts against both side faces of the first upper protrusion 12 (column upper reinforcement 41A) and the first lower protrusion 22 (column lower reinforcement 42A), and the end face on the other side in the X direction of the horizontal opposing member 69 abuts against both side faces of the second upper protrusion 13 (column upper reinforcement 41B) and the second lower protrusion 23 (column lower reinforcement 42B).

[0099] In the first embodiment, in the horizontal opposing member installation step (FIG. 4A), filler 65 is filled between side surface 13a of second upper protrusion 13 and surface 61b of upper opposing member 61 facing thereto. In this way, it is desirable to fill filler 65, which is filled in a vinyl bag or the like, between at least one side surface of first upper protrusion 12 and second upper protrusion 13 and the surface of upper opposing member 61 (horizontal opposing member) facing said side surface.

[0100] By doing so, even if the side surfaces of the first and second upper protrusions 12 and 13 are inclined or uneven, or the upper opposing member 61 is bent, the end faces of the upper opposing member 61 can be brought into surface contact with the side surfaces of the first and second upper protrusions 12 and 13 without any gaps. This prevents localized force from acting on the side surfaces of the first and second upper protrusions 12 and 13 or the end faces of the upper opposing member 61. This increases the strength of the building 1 against horizontal external forces, and also makes it less likely for the upper opposing member 61 to bend or buckle. Furthermore, damage to the first and second upper protrusions 12 and 13 can be suppressed.

[0101] Similarly, in the first embodiment, the filler 65 is filled between the side surface 23a of the second lower protrusion 23 and the opposing surface 62b of the lower opposing member 62. In this way, it is desirable to fill the space between the side surface of at least one of the first lower protrusion 22 and the second lower protrusion 23 and the surface of the lower opposing member 62 (horizontal opposing member) opposing that side surface with the filler 65, which is filled in a vinyl bag or the like.

[0102] This allows the end faces of the lower opposing member 62 to abut against the side faces of the first and second lower protrusions 22 and 23 without any gaps. This prevents localized force from acting on the side faces of the first and second lower protrusions 22 and 23 or the end faces of the lower opposing member 62. This increases the strength of the building 1 against horizontal external forces and makes it less likely for the lower opposing member 62 to bend or buckle. It also reduces damage to the first and second lower protrusions 22 and 23.

[0103] However, the present invention is not limited to the above, and the horizontal opposing members 61, 62 may be installed without using the filler 65. Furthermore, providing the filler 65 only on the other X-direction side of the horizontal opposing members 61, 62 as in the first embodiment facilitates installation. On the other hand, if the filler 65 is provided on both X-direction sides of the horizontal opposing members 61, 62, the end faces of the horizontal opposing members 61, 62 more reliably abut against the side faces of the first and second upper protrusions 12, 13 and the first and second lower protrusions 22, 23. Furthermore, in the above embodiment, the horizontal opposing members 60, 61, 62 installed between the first and second upper protrusions 12, 13 and the first and second lower protrusions 23 move in the vertical direction. Therefore, filling a vinyl bag or the like with the filler 65 allows the horizontal opposing members 60, 61, 62 to move more smoothly.

[0104] Furthermore, in the first embodiment, after the horizontal opposing member installation step, a step of installing seismic isolation devices 30 is carried out between the first upper protrusion 12 and the first lower protrusion 22, and between the second upper protrusion 13 and the second lower protrusion 23, on both outer sides where the horizontal opposing members 61, 62 are installed. In other words, the horizontal opposing members 61, 62 are installed near the columns 2 that are cut to install the seismic isolation devices 30. Therefore, the horizontal opposing members 61, 62 can more reliably suppress positional deviation of the superstructure 10 relative to the substructure 20, allowing for safe construction.

[0105] Furthermore, in the first embodiment, a reinforcement forming process for forming the upper column reinforcements 41A, 41B and the lower column reinforcements 42A, 42B is carried out before the horizontal countermember installation process and the temporary support member installation process. Therefore, in the horizontal countermember installation process, the horizontal countermembers 61, 62 can be abutted against the side surfaces of the upper column reinforcements 41A, 41B and the side surfaces of the lower column reinforcements 42A, 42B. Therefore, the horizontal external force acting on the upper structure 10 can be transmitted from the upper column reinforcements 41A, 41B to the upper countermember 61, and further from the upper countermember 61 to the lower countermember 62 and the lower column reinforcements 42A, 42B (substructure 20).

[0106] Furthermore, in the temporary support member installation step, the temporary support members 50 can be brought into contact with the undersides of the upper column reinforcements 41A, 41B and the upper surfaces of the lower column reinforcements 42A, 42B. Therefore, the temporary support members 50 can be installed around the column 2 to be cut, and after the column 2 is cut, the temporary support members 50 can transmit the load of the upper structure 10 to the lower structure 20.

[0107] However, instead of the reinforcement parts formed in the seismic isolation construction, the horizontal opposing members 61, 62 may be abutted against the side surfaces of the first and second upper protrusions 12, 13 and the side surfaces of the first and second lower protrusions 22, 23 that are originally provided on the existing building 1. Similarly, the temporary support members 50 may be abutted against the underside of the superstructure 10 and the top surface of the substructure 20 that are originally provided on the existing building 1.

[0108] === Second Embodiment === Fig. 12 is an explanatory diagram of the temporary support member installation process and the horizontal opposing member installation process of the second embodiment, and is a front view of the existing building 1. Fig. 13 is an explanatory diagram of the horizontal opposing member group 60 of the second embodiment, and is a front view of the horizontal opposing member group 60.

[0109] In the installation method for the seismic isolation device of the first embodiment, in the horizontal opposing member installation process and the connecting process, both end faces in the X direction of the upper opposing member 61 are abutted against the side surfaces of the first and second upper protrusions 12 and 13, and both end faces in the X direction of the lower opposing member 62 are abutted against the side surfaces of the first and second lower protrusions 22 and 23, and the horizontal opposing member group 60 is moved upward. However, in the installation method for the seismic isolation device of the second embodiment, for example, in the horizontal opposing member installation process, the horizontal opposing member group 60 is installed by hanging it from the upper horizontal section 11, and a connecting member 64 is placed between the hung horizontal opposing member group 60 and the lower horizontal section 21, and the connecting member 64 supports the horizontal opposing member group 60 on the lower horizontal section 21, maintaining the upper opposing member 61 in a state of abutting against the upper horizontal section 11.

[0110] Specifically, in the installation method for the seismic isolation device of the second embodiment, for example, first, in the reinforcement formation process, when concrete is poured between the tops of the columns 2A and 2B to be constructed in order to form the upper horizontal section 11, a female-threaded anchor 74 into which the bolt 66 can be screwed is provided in accordance with the position of the through hole provided in the upper flange 611A of the upper opposing member 61 arranged along the X direction.

[0111] Then, in the horizontal countermember installation step, the upper flange 611A of the upper countermember 61 is abutted against the upper horizontal portion 11, and bolts 66 are inserted into through-holes provided in the upper flange 611A and the washer plate 68 and screwed into anchors 74 provided on the upper horizontal portion 11 to fix the upper countermember 61 to the upper horizontal portion 11. Note that instead of providing a female-threaded anchor on the upper horizontal portion 11, anchor bolts may be protruded downward from the upper horizontal portion 11, inserted into through-holes in the upper flange 611A of the upper countermember 61, and fixed by screwing in nuts. Alternatively, anchors may be installed after concrete is poured between the tops of the columns 2A and 2B to be constructed to form the upper horizontal portion 11.

[0112] The lower flange 611A of the upper opposing member 61 suspended from the upper horizontal portion 11 and the upper flange of the top connecting member 63 are brought into face-to-face contact with each other and joined together with bolts 66, nuts 67 and washer plates 68.

[0113] Similarly, the second connecting member 63 from the top, the bottom connecting member 63, and the lower opposing member 62 are joined in this order, starting from the top, using bolts 66, nuts 67, and washer plates 68. As a result, the upper opposing member 61, the three connecting members 63, and the lower opposing member 62 form a horizontal opposing member group 60, which is suspended from the upper horizontal section 11, as shown in FIG.

[0114] Next, in the connecting step, the connecting member 64 is installed between the horizontal opposing member group 60 and the lower horizontal portion 21. In the connecting step of the second embodiment, the connecting member 64 is installed below the horizontal opposing member group 60, more specifically, on the lower horizontal portion 21 located below the lower opposing member 62, and then extended vertically upward to the lower surface of the lower opposing member 62, so that the connecting member 64 abuts (connects) against the lower surface of the lower opposing member 62. At this time, the upper surface of the upper flange 611A of the upper opposing member 61 is reliably abutted against (connected to) the lower surface of the upper horizontal portion 11.

[0115] In the second embodiment, the connection process is performed after the horizontal counter-member installation process, but the temporary support member installation process may be performed before, after, or simultaneously with the horizontal counter-member installation process and the connection process.

[0116] ===Third Embodiment=== Fig. 14 is a flow diagram showing the steps of the method for installing a seismic isolation device according to the third embodiment. Fig. 15A is an explanatory diagram of the cutting process of the columns (2A, 2B), and Fig. 15B is an explanatory diagram of the seismic isolation device installation process. Fig. 16 is an explanatory diagram of the horizontal opposing member installation process according to the third embodiment. Fig. 17A is an explanatory diagram of the cutting process of another column (2D), and Fig. 17B is an explanatory diagram of the other seismic isolation device installation process. Figs. 18A to 18D are schematic plan views of an existing building 1. In Figs. 18A to 18D, columns 2 in which a seismic isolation device 30 has been installed at the cut location are indicated by open squares, and columns 2 that have not been cut and do not have a seismic isolation device 30 installed are indicated by filled squares.

[0117] In the seismic isolation device installation method of the third embodiment, first, a reinforcement portion forming step (S11) is performed, as in the first and second embodiments (FIG. 2). However, if there is no need to reinforce the existing building 1, the reinforcement portion forming step is unnecessary. Next, as shown in FIG. 15A, a temporary support member installation step (S12) is performed in which temporary support members 50 are installed around the columns 2A and 2B to be installed, but no horizontal support members are installed between the columns 2A and 2B to be installed. Next, a column cutting step (S13) is performed, and then a seismic isolation device installation step (S14) is performed on the columns 2A and 2B as shown in FIG. 15B. More specifically, a first lower foundation 31A is formed at the cut portion of the column 2A, and after the first seismic isolation device 30A is installed on the first lower foundation 31A, a first upper foundation 32A is formed. Furthermore, a second lower foundation 31B is formed at the cut portion of the column 2B, and after the second seismic isolation device 30B is installed on the second lower foundation 31B, the second upper foundation 32B is formed. As a result, the seismic isolation device 30 is installed on the columns 2A and 2B as shown in Fig. 15B.

[0118] Then, after the seismic isolation device installation step (S14), a horizontal opposing member installation step (S15) is performed in the space between the columns 2A, 2B where the installation of the seismic isolation devices 30 has been completed, as shown in FIGS. 16 and 18B. Specifically, the horizontal opposing member group 70 of the third embodiment includes one horizontal opposing member 71 (e.g., an earth retaining member) and two support members 72 (e.g., piece members) as connecting members. The horizontal opposing member 71 is installed along the X direction between the first upper foundation 32A (first upper protrusion) installed on the first seismic isolation device 30A and the second upper foundation 32B (second upper protrusion) installed on the second seismic isolation device 30B, and between the first lower foundation 31A (first lower protrusion) installed below the first seismic isolation device 30A and the second lower foundation 31B installed below the second seismic isolation device 30B. In other words, the end face of the horizontal opposing member 71 on one side in the X direction is abutted against the side face of the first upper foundation 32A and the side face of the first lower foundation 31A, and the end face of the horizontal opposing member 71 on the other side in the X direction is abutted against the side face of the second upper foundation 32B and the side face of the second lower foundation 31B, so that the horizontal opposing member 71 is installed horizontally or approximately horizontally along the X direction.

[0119] At this time, a support member 72 is placed on the first lower protrusion 22 and the second lower protrusion 23, and a horizontal counter member 71 is installed on top of that. A filler 75 (e.g., grout material) is filled as a connecting member between the upper surface of the installed horizontal counter member 71 and the first upper protrusion 12 and the second upper protrusion 13 to eliminate any gaps. This connects the horizontal counter member 71 to the first lower protrusion 22 and the second lower protrusion 23, which form the lower connecting portion, and also connects the horizontal counter member 71 to the first upper protrusion 12 and the second upper protrusion 13, which form the upper connecting portion (connecting step S15).

[0120] In this case as well, the horizontal external force acting on the superstructure 10 can be transmitted from the upper foundation 32 to the horizontal counter member 71, and further from the horizontal counter member 71 to the lower foundation 31 (substructure 20). This makes it possible to suppress misalignment of the superstructure 10 in the X direction relative to the substructure 20. Furthermore, because the horizontal counter member 71 is installed horizontally or approximately horizontally, the strength of the building 1 against horizontal external forces is increased, and bending or buckling of the horizontal counter member 71 becomes less likely to occur.

[0121] In the seismic isolation device installation method of the third embodiment, the seismic isolation device 30 is installed midway between multiple columns 2 on the construction floor. That is, the upper structure 10 and the lower structure 20 have a third upper protrusion (e.g., the third upper protrusion 14 in FIG. 15A ) protruding downward from the upper horizontal section 11 and a third lower protrusion (e.g., the third lower protrusion 24 in FIG. 15A ) protruding upward from the lower horizontal section 21 at a location different from the location where the first seismic isolation device 30A and the second seismic isolation device 30B are installed. A process of installing the seismic isolation device 30 between the third upper protrusion 14 and the third lower protrusion 24, i.e., midway between a column 2 different from columns 2A and 2B (e.g., column 2D in FIG. 15A ) (another seismic isolation device installation process S16), may be performed after the horizontal counter-member installation process. That is, after the horizontal counter-member installation process (FIG. 16 ), a temporary support member 50 is installed around column 2D, and the column cutting process (protrusion formation process) is performed. Specifically, a portion of the column 2D extending from the lower horizontal portion 21 to the upper horizontal portion 11 is cut (FIG. 17A), and a third upper protrusion 14, which is the upper portion of the column 2D, and a third lower protrusion 24, which is the lower portion of the column 2D, are formed. After that, the third seismic isolation device 30D is installed between the third upper protrusion 14 and the third lower protrusion 24 (FIGS. 17B and 18C). This installation can be carried out safely thanks to the horizontal counter member 71 installed between the columns 2A and 2B.

[0122] In this way, in the early stages of seismic isolation construction, when many columns 2 and walls (bearing walls (not shown) and exterior walls) have not yet been cut (e.g., FIG. 18A), displacement of the superstructure 10 can be suppressed even if no horizontal opposing members are installed in the space between the columns 2A and 2B to be constructed. Then, as the construction progresses and the cutting of the columns 2 and walls progresses (e.g., FIG. 18B), it is advisable to install a group of horizontal opposing members 70 between the columns 2A and 2B on which the seismic isolation devices 30 have already been installed. This ensures safe construction. Then, as shown in FIG. 18D, it is advisable to install the group of horizontal opposing members 70 at the locations where the seismic isolation devices 30 have already been installed, and finally install the seismic isolation devices 30 midway along all of the columns 2. Note that it is not necessary to install a group of horizontal opposing members 70 around all of the columns 2 on which the seismic isolation devices 30 are installed. As long as construction can be carried out safely, it is also possible not to install a group of horizontal opposing members 70 around some of the columns 2, as shown in FIG. 18D.

[0123] Furthermore, the horizontal opposing members 71 of the third embodiment can also be installed in a direction intersecting the X direction (the perpendicular Y direction), in which case it is possible to suppress positional deviation of the superstructure 10 in the Y direction. In Fig. 18D, the group of horizontal opposing members 70 that resist horizontal external forces in the X direction is labeled 70X, and the group of horizontal opposing members 70 that resist horizontal external forces in the Y direction is labeled 70Y.

[0124] Moreover, in the third embodiment, horizontal opposing members 71 are abutted against the side surfaces of the upper foundation 32 and the lower foundation 31 of the seismic isolation device 30. The vertical distance between the upper foundation 32 and the lower foundation 31 is narrower than the vertical distance between the column upper reinforcements 41A, 41B and the column lower reinforcements 42A, 42B. Therefore, in the third embodiment, the number of horizontal opposing members 71 can be reduced (here, to one), or connecting members can be made unnecessary. This makes it easier to perform the horizontal opposing member installation process.

[0125] Furthermore, it is desirable that the horizontal opposing member 71 of the third embodiment is also supported from below by support members 72. This makes it possible to suppress deflection of the horizontal opposing member 71 due to its own weight. In this case, it is desirable to install the support members 72 on the upper surface of the lower foundation 31 as shown in FIG. 16. This makes it possible to reduce the number of support members 72 compared to installing the support members from the floor surface FL2 of the construction floor. Furthermore, by adjusting the installation height of the horizontal opposing member 71 using the support members 72, it is possible to make the horizontal opposing member 71 abut evenly against the lower foundation 31 and the upper foundation 32.

[0126] Furthermore, it is desirable that the horizontally opposing member 71 be placed on the first lower protrusion 22 and the second lower protrusion 23 via support members 72, and that grout or the like be filled between the first upper protrusion 12 and the second upper protrusion 13. By doing so, it is possible to suppress rotation of the horizontally opposing member 71 due to a moment with the lower structure 20 as the reaction point, which is generated by a horizontal external force acting on the upper structure 10.

[0127] Furthermore, in the third embodiment, it is also desirable to fill the gap between the side surface of the upper foundation 32 and the opposing horizontal counter member 71 with filler 73. Similarly, it is desirable to fill the gap between the side surface of the lower foundation 31 and the opposing horizontal counter member 71. This allows the horizontal counter member 71 to abut the upper foundation 32 and the lower foundation 31 with their faces, preventing the occurrence of areas where force is applied locally.

[0128] In the above embodiment, an example has been described in which a vertically expandable connecting member 64 is provided below the horizontally opposing member group 60, which constitutes the horizontal opposing member, to connect the horizontal opposing member to the upper horizontal section and the lower horizontal section, but this is not limited to this. For example, a fixed, non-expandable connecting member (e.g., the above-mentioned piece members 612, 622, etc.) or a filler such as grout filled in a vinyl bag may also be used as the connecting member. Furthermore, a connecting member may be provided between the horizontal opposing member and the upper connecting portion, or between the horizontal opposing member and the lower connecting portion. Multiple types of connecting members may also be provided between the horizontal opposing member and the upper connecting portion, and between the horizontal opposing member and the lower connecting portion, respectively. In other words, if there is a connection between the horizontal opposing member and the upper connecting portion, and between the horizontal opposing member and the lower connecting portion, it is possible to suppress the rotation of the horizontal opposing member 71 due to the moment generated by the horizontal external force acting on the upper structure 10, with the lower structure 20 as the reaction point.

[0129] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof.

[0130] For example, the method for installing a seismic isolation device may involve installing both the horizontal opposing members 61, 62 of the first and second embodiments and the horizontal opposing member 71 of the third embodiment, and combining both increases the flexibility of the construction plan. [Explanation of symbols]

[0131] 1 existing building, 2 columns, 10 superstructure, 11 upper horizontal part (upper connecting part), 12 first upper protrusion (upper connecting part), 13 second upper protruding part (upper connecting part), 20 Lower structure, 21 Lower horizontal section (lower connecting section), 22 first lower protrusion (lower connecting part), 23 second lower protruding part (lower connecting part), 30 Seismic isolation device, 30A: First seismic isolation device; 30B: Second seismic isolation device; 31A 1st lower foundation, 31B 2nd lower foundation, 32A 1st upper foundation, 32B 2nd upper foundation, 41 Upper column reinforcement part, 42 Lower column reinforcement part, 50 temporary support member, 60 horizontal opposing members, 61 Upper opposing member (horizontal opposing member), 62 Lower opposing member (horizontal opposing member), 63 connecting member, 64 connecting member, 66 bolt, 70 horizontal opposing member group, 71 horizontal opposing member, 72 support member (connecting member), 75 filler material (connecting member), S void W is the vertical width of the gap, L(L1-L2) is the amount of subsidence, L1: The distance between the upper horizontal part and the lower horizontal part when the upper structure is supported by the temporary support member. L2: Distance between the upper horizontal part and the lower horizontal part when the upper structure is supported by the seismic isolation device. H height of upper counter member,

Claims

1. A method for installing a seismic isolation device between an upper structure and a lower structure, the upper structure has an upper horizontal portion, and an upper connecting portion including a first upper protruding portion and a second upper protruding portion protruding downward from the upper horizontal portion and spaced apart in a first direction; the lower structure has a lower horizontal portion, and a lower connecting portion including a first lower protruding portion and a second lower protruding portion protruding upward from the lower horizontal portion and spaced apart in the first direction; The method for installing the seismic isolation device is as follows: a horizontal opposing member installation step of installing a horizontal opposing member along the first direction between the first upper protrusion and the second upper protrusion and between the first lower protrusion and the second lower protrusion, the horizontal opposing member opposing the horizontal external force in the first direction; a connecting step for connecting the horizontal opposing member and the upper connecting portion, and the horizontal opposing member and the lower connecting portion, after the horizontal opposing member installation step, in which a connecting member that is a member that can be extended and contracted in the vertical direction is installed between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion; A method for installing a seismic isolation device, comprising:

2. A method for installing a seismic isolation device between an upper structure and a lower structure, the upper structure has an upper horizontal portion, and an upper connecting portion including a first upper protruding portion and a second upper protruding portion protruding downward from the upper horizontal portion and spaced apart in a first direction; the lower structure has a lower horizontal portion, and a lower connecting portion including a first lower protruding portion and a second lower protruding portion protruding upward from the lower horizontal portion and spaced apart in the first direction; the seismic isolation devices are respectively installed between a first upper foundation protruding below the first upper protrusion and a first lower foundation protruding above the first lower protrusion, and between a second upper foundation protruding below the second upper protrusion and a second lower foundation protruding above the second lower protrusion; The method for installing the seismic isolation device is as follows: a horizontal resisting member installation process for arranging a horizontal resisting member along the first direction between the first upper foundation and the second upper foundation and between the first lower foundation and the second lower foundation, the horizontal resisting member configured to resist the horizontal external force in the first direction; a connecting step for connecting the horizontal opposing member and the upper connecting portion, and the horizontal opposing member and the lower connecting portion, after the horizontal opposing member installation step, in which a connecting member that is a member that can be extended and contracted in the vertical direction is installed between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion; A method for installing a seismic isolation device, comprising:

3. 3. A method for installing a seismic isolation device according to claim 1 or 2, A method for installing a seismic isolation device, characterized in that in the connection process, a filler material is filled between the horizontal opposing member and the upper connection portion, and / or between the horizontal opposing member and the lower connection portion.

4. 3. A method for installing a seismic isolation device according to claim 1 or 2, A method for installing a seismic isolation device, characterized in that in the connection process, a non-expandable connection member is installed between the horizontal opposing member and the upper connection portion and / or between the horizontal opposing member and the lower connection portion.

5. 3. A method for installing a seismic isolation device according to claim 1 or 2, A method for installing a seismic isolation device, characterized in that the horizontal opposing member is supported above the lower connecting portion by a connecting member and abuts against the upper connecting portion.

6. 3. A method for installing a seismic isolation device according to claim 1 or 2, A method for installing a seismic isolation device, characterized in that in the horizontal counter member installation step, the horizontal counter member is connected to the upper connection portion.

7. A method for installing a seismic isolation device according to any one of claims 4 to 6, A method for installing a seismic isolation device, characterized in that in the connection process, a filler material is filled between the horizontal opposing member and the upper connection portion, and / or between the horizontal opposing member and the lower connection portion.

8. A method for installing a seismic isolation device according to any one of claims 1 to 6, The first upper protrusion and the second upper protrusion each have an upper portion of a pillar and a pillar upper reinforcing portion in which concrete is poured on the outside of the upper portion of the pillar, The first lower protrusion and the second lower protrusion each have a lower portion of a pillar and a pillar lower reinforcing portion in which concrete is poured on the outside of the lower portion of the pillar, a seismic isolation device installation step of installing a first seismic isolation device between the first upper protrusion and the first lower protrusion, and installing a second seismic isolation device between the second upper protrusion and the second lower protrusion, after the horizontal counter member installation step; a temporary support member installation step of installing temporary support members between the first upper protrusion and the first lower protrusion, and between the second upper protrusion and the second lower protrusion, respectively, before the seismic isolation device installation step, for temporarily supporting the load of the upper structure; A reinforcement portion forming step of forming the column upper reinforcement portion and the column lower reinforcement portion is included before the horizontal counter member installation step and the temporary support member installation step, A temporary support member removal step of removing the temporary support member is included after the seismic isolation device installation step. A method for installing a seismic isolation device, characterized by including a gap forming process, which is performed after the seismic isolation device installation process and before the temporary support member removal process, to form a gap above or below the horizontal opposing member to separate the horizontal opposing member from the upper connecting portion or the lower connecting portion.

9. The method for installing the seismic isolation device according to claim 8, A method for installing a seismic isolation device, characterized in that the vertical width of the gap is wider than the amount of sinking that occurs when the upper structure is supported by the seismic isolation device and sinks when the temporary support member is removed.

10. A method for installing a seismic isolation device according to any one of claims 1 to 9, The horizontal opposing member has an upper opposing member and a lower opposing member, In the horizontal opposing member installation step, A method for installing a seismic isolation device, characterized in that the upper opposing member is installed along the first direction, and the lower opposing member is installed along the first direction, and the upper opposing member and the lower opposing member are connected by bolts arranged along the vertical direction.

11. An installation structure for a seismic isolation device having a seismic isolation device between an upper structure and a lower structure, the upper structure having an upper connecting portion including an upper horizontal portion, a first upper protrusion portion and a second upper protrusion portion protruding downward from the upper horizontal portion and spaced apart in a first direction; the lower structure having a lower connecting portion including a lower horizontal portion, a first lower protruding portion and a second lower protruding portion protruding upward from the lower horizontal portion and spaced apart in the first direction; a horizontal resisting member that is installed along the first direction between the first upper protrusion and the second upper protrusion and between the first lower protrusion and the second lower protrusion, and that resists a horizontal external force in the first direction; A connecting member that connects the horizontal opposing member and the upper connecting portion, and the horizontal opposing member and the lower connecting portion, is a connecting member that is a vertically expandable member installed between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion; An installation structure for a seismic isolation device, comprising:

12. An installation structure for a seismic isolation device having a seismic isolation device between an upper structure and a lower structure, the upper structure having an upper connecting portion including an upper horizontal portion, a first upper protrusion portion and a second upper protrusion portion protruding downward from the upper horizontal portion and spaced apart in a first direction; the lower structure having a lower connecting portion including a lower horizontal portion, a first lower protruding portion and a second lower protruding portion protruding upward from the lower horizontal portion and spaced apart in the first direction; the seismic isolation devices being installed between a first upper foundation protruding below the first upper protrusion and a first lower foundation protruding above the first lower protrusion, and between a second upper foundation protruding below the second upper protrusion and a second lower foundation protruding above the second lower protrusion, respectively; a horizontal resisting member that is installed along the first direction between the first upper foundation and the second upper foundation and between the first lower foundation and the second lower foundation, and that resists a horizontal external force in the first direction; A connecting member that connects the horizontal opposing member and the upper connecting portion, and the horizontal opposing member and the lower connecting portion, is a connecting member that is a vertically expandable member installed between the horizontal opposing member and the upper connecting portion and / or between the horizontal opposing member and the lower connecting portion; An installation structure for a seismic isolation device, comprising:

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