Seismic isolation device installation method and building

Abstract

To provide a construction method of a base isolation device which enables base isolation of an existing building with a simple process.SOLUTION: A construction method of a base isolation device has such a configuration that a base isolation device 100 that is used as a plain bearing and has a flat jack 150 is inserted into an opening O formed on a rising part 21 of foundation 20 of a building, and a region other than the opening of the foundation is vertically divided in a state in which the load of the building is applied on the base isolation device.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a method for installing a seismic isolation device in an existing building to provide seismic isolation, and to a building that has been provided with such seismic isolation. [Background technology]

[0002] 2. Description of the Related Art In order to improve the seismic isolation of a building, it is known to provide a seismic isolation device in the foundation of the building, which allows horizontal displacement of the foundation when the building frame is vibrated by an earthquake. As an example of prior art related to seismic isolation for buildings, Patent Document 1 describes a seismic isolation structure for a building in which restoring bearings with laminated rubber bodies and sliding bearings with sliding plates and sliders that can slide horizontally are distributed throughout the foundation structure to support the building frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-125183 Summary of the Invention [Problem to be solved by the invention]

[0004] It has been proposed to retrofit the above-mentioned seismic isolation device into an existing building that is several decades to a hundred years old after completion, thereby seismically isolating the building. One example of a construction method for seismically isolating an existing building is to move the building horizontally without demolishing it, remove the existing foundation, and then reconstruct a new foundation equipped with seismic isolation devices using the same method as for a new building (a method known as foundation seismic isolation). Another known method for base isolation is to drive piles to temporarily support the upper building, and then remove the existing foundation and rebuild it while the upper building is still temporarily supported by these piles. Another known method is to separate the base of a building from its foundation, jack up the building with a hydraulic jack, and insert a seismic isolation device into the resulting gap (high-floor seismic isolation method).

[0005] However, in the case of the base isolation plan, the labor required to move the house would be enormous, which would lengthen the construction period and increase construction costs. Furthermore, in the case of the high-floor seismic isolation plan, the reinforcement work for the structure to enable the building to be jacked up requires a great deal of labor and cost, and there was the problem that the jacking work to raise the building while maintaining horizontal level synchronization was highly difficult. In view of the above-mentioned problems, an object of the present invention is to provide a method for installing a seismic isolation device that can seismically isolate an existing building through a simple process, and the building. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one aspect of the method for installing a seismic isolation device of the present invention is characterized in that the seismic isolation device is inserted into an opening formed in the rising portion of the foundation of a building, and while the load of the building is loaded on the seismic isolation device, the area of ​​the rising portion other than the opening is divided into upper and lower parts. According to this method, after inserting the seismic isolation device into an opening formed in the rising part of the foundation, the area other than the opening in the rising part is divided into upper and lower parts, and the seismic isolation device can be installed through a simple process without supporting the existing building with a hydraulic jack or the like, or further moving or lifting the building.

[0007] In the present invention, the opening may be formed in the rising portion at a location where the seismic isolation device is to be installed before the seismic isolation device is inserted. This allows a dedicated opening for inserting the seismic isolation device to be newly formed at any location on the rising section, thereby increasing the freedom in setting the installation location of the seismic isolation device compared to when using an existing opening, etc.

[0008] In the present invention, a reinforcing material may be installed in the region above the opening in the existing skeleton of the building, along the longitudinal direction of the rising portion in a plan view. This effectively reinforces the existing structure to accommodate changes in the load transfer path from the existing foundation to the newly installed seismic isolation device before and after seismic isolation, thereby improving the durability and reliability of the building.

[0009] In the present invention, a flat jack having a flat shape along a horizontal plane and expanding in the vertical direction when injection material is supplied is provided on at least one of the upper and lower parts of the seismic isolation device, and the division of the rising portion can be performed after the injection material is supplied to the flat jack. This allows the load and height of the seismic isolation device to be adjusted with precision by controlling the pressure of the injection material, and the seismic isolation device can be installed while maintaining the height and horizontal level of the building.

[0010] In the present invention, the pressure of the injection material supplied to the flat jack can be set based on the weight distribution of the building. This allows the height and horizontal level of the building to be maintained with high precision when the seismic isolation device is installed. In the present invention, the weight distribution of the building may be calculated using a three-dimensional model generated by three-dimensionally measuring the shape of the building. This allows a three-dimensional model to be easily and quickly generated based on measurement results using a three-dimensional scanner installed on the ground or mounted on a mobile object such as a drone, and the weight distribution of a building can be calculated accurately.

[0011] In the present invention, the seismic isolation device can be configured to have a sliding plate having a sliding surface extending along a horizontal plane, and a sliding support having a slider that comes into contact with the sliding surface of the sliding plate in a slidable state relative to the sliding plate. This allows the seismic isolation device to be made thin with small vertical dimensions, making it possible to reduce the vertical dimensions of the opening, thereby increasing design freedom when applied to the rising part of the foundation of an existing building. In the present invention, the sliding plate may be configured by combining a plurality of members that are divided along the longitudinal direction of the rising portion in a plan view. According to this, when inserting the seismic isolation device into the opening, only a part of the sliding plate is inserted into the opening, and then the weight of the building is applied to the seismic isolation device, separating the part of the rising part other than the opening into upper and lower parts, and then connecting the other part of the sliding plate.This reduces the size of the opening required when initially inserting the seismic isolation device, reduces the burden on the existing building, and makes construction easier.

[0012] Furthermore, in order to solve the above-mentioned problems, according to one aspect of the building of the present invention, a building has a seismic isolation device installed between the lower end of the main body and the upper end of the rising part of the foundation, and is characterized in that the lower end of the main body and the upper end of the rising part are formed of a concrete-based material and the cut surface of the aggregate is exposed. According to another aspect of the building of the present invention, there is provided a building having a seismic isolation device installed between the lower end of the main body and the upper end of the rising portion of the foundation, wherein the seismic isolation device has a sliding plate having a sliding surface extending along a horizontal plane, and a sliding bearing having a slider that is in contact with the sliding surface of the sliding plate and is capable of sliding relative to the sliding plate, and the sliding plate is formed by combining multiple members that are divided along the longitudinal direction of the rising portion when viewed in plan. [Effects of the Invention]

[0013] As described above, according to the present invention, it is possible to provide a method for installing a seismic isolation device that can seismically isolate an existing building through a simple process, and a building. [Brief explanation of the drawings]

[0014] [Figure 1]1 is a plan view schematically showing the configuration of the foundation of a building to which a first embodiment of a method for installing a seismic isolation device to which the present invention is applied is carried out. [Figure 2] FIG. 2 is a front view of the continuous foundation portion of the building of the first embodiment, showing the state in which reinforcing materials have been installed in the base portion of the building. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. [Figure 4] FIG. 2 is a front view of the continuous foundation portion of the building of the first embodiment, showing the state immediately after the opening is formed. [Figure 5] FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4. [Figure 6] FIG. 2 is a front view of the continuous foundation portion of the building of the first embodiment, showing the state after the seismic isolation device has been installed. [Figure 7] FIG. 2 is a schematic two-sided view of the flat jack according to the first embodiment. [Figure 8] 2A to 2C are schematic cross-sectional views of the flat jack in the first embodiment before and after expansion. [Figure 9] FIG. 2 is a front view of the continuous foundation portion of the building of the first embodiment, showing the state in which the portion other than the opening of the rising portion has been cut away. [Figure 10] 10 is a schematic cross-sectional view of a seismic isolation device according to a second embodiment of a method for constructing a seismic isolation device to which the present invention is applied. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] First Embodiment A first embodiment of a method for installing a seismic isolation device and a building to which the present invention is applied will be described below. In the construction method of the seismic isolation device of the first embodiment, the building to be constructed is, for example, a two-story brick building that has been constructed more than 100 years ago and has undergone large-scale reinforcement in the past, changing the structure from masonry to reinforced concrete.

[0016] FIG. 1 is a plan view that schematically shows the configuration of a foundation portion of a building to which a first embodiment of a method for installing a seismic isolation device to which the present invention is applied is carried out. The foundation 1 has a mat foundation 10 provided in the center of the building and a continuous foundation 20 provided substantially along the exterior wall of the building. The slab foundation 10 was newly installed in the area where the first floor floor and the foundation below it of the existing structure were removed. The mat foundation 10 has a floor portion formed integrally with a reinforced concrete (RC) slab over the entire area where it is to be installed. The planar shape of the mat foundation 10 when viewed from above is, for example, substantially rectangular.

[0017] At the four corners of the mat foundation 10, seismic isolation rubber bearings 30, which are seismic isolation devices, are provided. The seismic isolation rubber bearing 30 has a function of receiving the load of the building via the elasticity of a laminated rubber body or the like, and also of allowing horizontal displacement of the building in response to vibrations caused by earthquakes or the like. Furthermore, when horizontal displacement of the building occurs, the seismic isolation rubber bearing 30 generates a restoring force that restores the building to a neutral position due to the elastic force of the laminated rubber body.

[0018] FIG. 2 is a front view of the continuous foundation portion of the building of the first embodiment, showing a state in which a reinforcing material has been installed in the foundation portion of the building (a view taken along the arrows II-II in FIG. 3). 3 is a cross-sectional view taken along the line III-III in FIG. 2. FIG. The continuous footing 20 is a continuous footing foundation having a rising portion 21 and a footing portion 22 integrally formed from, for example, reinforced concrete. The rising portion 21 is a flat plate-shaped portion that stands upward from the footing portion 22. The upper end of the rising portion 21 is connected to a base portion provided at the lower end of the exterior wall 40 of the building via anchor bolts or the like (not shown). The exterior wall 40 is formed, for example, by brick masonry. A reinforced wall 50 made of reinforced concrete is provided on the surface of the exterior wall 40 facing the inside of the building. The footing portion 22 is provided at the lower end of the rising portion 21 and is formed to protrude horizontally from the rising portion 21.

[0019] In the method for constructing the seismic isolation device of the first embodiment, first, the outer wall 40 of the building and the lower end of the reinforcing wall 50 (the foundation portion of the building) are reinforced with the reinforcing material 60. As shown in FIG. 3, the reinforcing material 60 may be, for example, a channel steel material (channel steel) having a U-shaped cross section. A pair of reinforcing members 60 are provided at the lower ends of the outer wall 40 and the reinforcing wall 50 so as to sandwich them in the thickness direction of the walls. This pair of reinforcing members 60 is fastened to the building by bolts 61 inserted into bolt holes formed through the exterior wall 40 and the reinforcing wall 50.

[0020] Following the installation of the reinforcing material 60, an opening O is formed in the rising portion 21 of the continuous footing 20, into which the seismic isolation device 100 is inserted. FIG. 4 is a front view of the continuous foundation portion of the building of the first embodiment, showing the state immediately after the opening is formed (a cross-sectional view taken along line IV-IV in FIG. 5). 5 is a cross-sectional view taken along the line VV in FIG. The height and width of the opening O are set so that the seismic isolation device 100 can be inserted before the flat jack 150, which will be described later, is expanded. The opening O can be formed by, for example, mechanical processing using a cutter or the like.

[0021] After the opening O is formed, the seismic isolation device 100 is inserted into the opening O and installed. FIG. 6 is a front view of the continuous foundation portion of the building of the first embodiment, showing the state after the seismic isolation device has been installed.

[0022] The seismic isolation device 100 is a sliding bearing that includes a slider 110, a sliding plate 120, a sliding plate holder 130, a base plate 140, a flat jack 150, and the like. The slider 110 is a member that is attached to the upper surface of the opening O of the rising portion 21 via a base plate 140 and a flat jack 150. The lower surface of the slider 110 is formed along a horizontal plane and is placed on the upper surface of the sliding plate 120 in a slidable state. The upper surface of the slider 110 is fixed to the lower surface of the lower support plate 155 of the flat jack 150 .

[0023] The sliding plate 120 is a flat plate-shaped member that is attached to the lower surface of the opening O of the rising portion 21 via a sliding plate holding portion 130. The upper surface of the sliding plate 120 is formed along a horizontal plane from a material having solid lubricity, such as tetrafluoroethylene, and serves as a sliding surface that abuts against the lower surface of the slider 110 in a slidable state. The planar shape and size of the sliding plate 120 are set so that the slider 110 will not fall off when the building experiences the maximum lateral displacement expected during an earthquake. A plurality of headed studs S are provided at the bottom of the sliding plate 120. The headed studs S are embedded in the RC slab that constitutes the sliding plate holding portion 130 and are used for connecting the sliding plate 120 to the sliding plate holding portion 130.

[0024] The sliding plate holding portion 130 is a portion provided between the lower surface of the opening O and the lower surface of the sliding plate 120. The sliding plate holding portion 130 has the function of transmitting the load from the building input via the sliding plate 120 to the lower part of the continuous footing 20 . The sliding plate holding portion 130 is configured in the shape of a flat plate, for example, as a slab of reinforced concrete construction.

[0025] The base plate 140 is a flat plate-shaped member provided between the upper surface of the opening O and the upper surface of the flat jack 150. The base plate 140 has the function of transmitting the load of the building to the flat jack 150 . The upper surface of the base plate 140 is fixed to the upper surface of the opening O. The lower surface of the base plate 140 is fixed to the upper surface of the upper support plate 154 of the flat jack 150 .

[0026] The flat jack 150 is a flat and thin jack device that obtains lift and lifting height by using the pressure of a grouting material, which is, for example, a cement-based fluid. FIG. 7 is a schematic two-sided view of the flat jack according to the first embodiment. FIG. 7(a) is a cross-sectional view of the flat jack taken along a plane along the vertical direction, and is a cross-sectional view taken along the arrow aa in FIG. 7(b). The flat jack 150 has a main body 151, an inlet 152, an outlet 153, an upper support plate 154, a lower support plate 155, and the like. The flat jack 150 may be configured to be housed in a flat jack box, which is a container-like member.

[0027] The main body 151 is formed into a container shape by joining two thin mild steel disks, each having a recess with a semicircular cross section formed along its outer periphery, by welding them together at their outer periphery. Before expansion (before injection of injection material), the main body 151 has a central portion in a plan view in which the upper surface and the lower surface are in contact with each other. Along the outer peripheral edge of the main body 151, an annular space having a substantially cylindrical cross section is formed.

[0028] The injection port 152 is a conduit that protrudes from the main body 151 toward the outer diameter side and is used to inject the injection material into the main body 151. The outlet 153 is a conduit that protrudes from the main body 151 toward the outer diameter side and is used to discharge excess grouting material from the main body 151.

[0029] The upper support plate 154 is a disk-shaped member fixed above the center of the main body 151 in a plan view. The lower support plate 155 is a disk-shaped member fixed below the center of the main body 151 in a plan view. The upper support plate 154 and the lower support plate 155 are formed of, for example, reinforced concrete (RC) in which a mesh M of reinforcing steel bars is embedded. The upper support plate 154 and the lower support plate 155 have concave portions formed on their outer peripheries that accommodate the cylindrical space provided on the outer periphery of the main body 151 before expansion.

[0030] FIG. 8 is a schematic cross-sectional view of the flat jack according to the first embodiment before and after expansion. FIG. 8(a) shows the state before the main body is expanded (the state when the seismic isolation device 100 is inserted into the opening O). FIG. 8(b) shows the state after the main body has been expanded (the state at the end of installation of the seismic isolation device 100). When injection material is injected through the injection port 152 of the flat jack 150, the main body 151 expands from the state shown in Figure 8(a) to the state shown in Figure 8(b), and the upper support plate 154 rises relative to the lower support plate 155. Here, if a cement-based injection material whose main component is mortar is used as the injection material, the injection material hardens inside the main body 151, and the flat jack 150 can be maintained in a permanent position supporting the building (at least for the life of the seismic isolation device 100). As the cement-based injection material, for example, one containing blast furnace cement type B and a CS-based shrinkage reducing material as its main components can be used.

[0031] The lifting force generated by the flat jack 150 correlates with the pressure of the grout supplied to the main body 151 . In the first embodiment, the pressure of the injection material in the plurality of flat jacks 150 provided on the continuous footing 20 is set using Building Information Modeling (hereinafter referred to as "BIM"). BIM allows the weight distribution of a building to be calculated by reproducing a three-dimensional model of the building (BIM model) on a computer with 3D CAD software installed. A BIM model is created, for example, by measuring the exterior and internal structure of a building using a 3D scanner installed on the ground or mounted on a mobile vehicle such as a drone (multicopter), and then converting the measurement results into 3D point cloud data or frame data.

[0032] A BIM model is a collection of objects that represent each component, such as walls, floors, beams, and columns, and includes information about the shape and position of each object. If the specific gravity of the materials that make up each part of the BIM model is known, the weight and weight distribution of the building can be calculated based on the BIM model. Based on this weight and weight distribution, it is possible to calculate the lifting force and lifting height required for each flat jack 150, and the supply pressure of the grouting material to each flat jack 150 is set based on this. In addition, the important period setting in seismically isolated buildings changes depending on the weight, so the accuracy of the calculated weight is extremely important, but by using such a BIM model, it can be calculated easily and with high accuracy. In addition, by using such a BIM model, it is possible to generate 3D views of each stage of construction, allowing for simulation and verification of construction procedures.

[0033] The injection material is injected into the flat jack 150 at a predetermined pressure, and after the injection material hardens and the building load is loaded onto the seismic isolation device 100, the area other than the opening O of the rising portion 21 of the continuous footing 20 is cut at the middle in the vertical direction, separating the rising portion 21 into an upper portion 21U and a lower portion 21L, and insulating them to prevent direct transmission of loads and vibrations. FIG. 9 is a front view of the continuous foundation portion of the building of the first embodiment, showing a state in which the portion other than the opening of the rising portion has been cut away. By cutting and separating the rising portion 21, the building is supported by the seismic isolation rubber bearings 30 and the seismic isolation device 100, which is a sliding bearing. This allows the building to be horizontally displaced relative to the ground in response to the excitation force of the earthquake, providing a seismic isolation effect. In the building after the construction of the seismic isolation device, the lower part 21L of the rising part 21 functions as a new upper end part of the continuous footing 20. On the other hand, the upper portion 21U of the rising portion 21 loses its function as a foundation by being cut off from the lower portion 21L, and functions as a base portion of the building.

[0034] In a building that has been seismically isolated using the above construction method, when the concrete is cut, unique surfaces appear at the upper end of the foundation (the upper surface of the lower part 21L of the rising part 21), which is positioned above and below the seismic isolation device 100, and at the lower end of the building (the lower surface of the upper part 21U of the rising part 21). On this surface, when the rising portion 21 is cut, the aggregate contained in the concrete is cut along with the mortar, and the cut surface of the aggregate is exposed on the surface. This type of exposed aggregate cross section is not seen when forming concrete members using ordinary formwork, and it is presumed that a building with this characteristic has been constructed using the construction method of the seismic isolation device of the present invention.

[0035] According to the first embodiment described above, the following effects can be obtained. (1) After inserting the seismic isolation device 100 into the opening O formed in the rising portion 21 of the continuous footing 20, the area of ​​the rising portion 21 other than the opening O is divided into upper and lower parts. This allows the seismic isolation device 100 to be installed through a simple process without supporting the existing building with a hydraulic jack or the like, or further moving or lifting the building. (2) By newly forming a dedicated opening O for inserting the seismic isolation device 100 at any location on the rising portion 21, the freedom to set the installation location of the seismic isolation device 100 can be increased compared to when using an existing opening, etc. (3) By installing reinforcement material 60 along the longitudinal direction of the rising portion 21 in a plan view along the exterior wall 40 above the opening O, the existing structure can be effectively reinforced to accommodate changes in the load transfer path from the existing continuous footing 20 to the newly installed seismic isolation device 100 before and after seismic isolation, thereby improving the durability and reliability of the building. (4) The seismic isolation device 100 is configured with a flat jack 150 that expands according to the pressure of the injection material. This allows the load and height of the seismic isolation device 100 to be adjusted with precision by controlling the pressure of the injection material, and the seismic isolation device 100 can be installed while maintaining the height and horizontal level of the building. (5) By setting the pressure of the injection material supplied to the flat jack 150 based on the weight distribution of the building, the height and horizontal level of the building can be maintained with high precision during the construction of the seismic isolation device. (6) By calculating the weight distribution of a building using a three-dimensional model generated by three-dimensionally measuring the shape of the building, a three-dimensional model can be easily and quickly generated based on the measurement results using a three-dimensional scanner installed on the ground or mounted on a mobile object such as a drone, and the weight distribution of the building can be calculated with high accuracy. (7) By using a sliding bearing having the slider 110 and the sliding plate 120 as the seismic isolation device 100, the seismic isolation device 100 can be configured to be thin and have a small vertical dimension. This makes it possible to reduce the vertical dimension of the opening O, thereby increasing the degree of design freedom when applying it to the rising part of the foundation of an existing building.

[0036] Second Embodiment Next, a second embodiment of a method for installing a seismic isolation device and a building to which the present invention is applied will be described. In the second embodiment, the same parts as those in the first embodiment described above are denoted by the same reference numerals and the description thereof will be omitted, and the differences will be mainly described. FIG. 10 is a schematic cross-sectional view of a seismic isolation device according to the second embodiment. FIG. 10(a) shows the seismic isolation device 100 installed in the continuous footing 20, and FIG. 10(b) shows the sliding plate 120 disassembled. In the second embodiment, the flat jack 150 is housed inside a flat jack box 156.

[0037] In the second embodiment, the sliding plate 120 is divided into three parts: a first member 121, a second member 122, and a third member 123, which are connected by a connecting member 124 provided below them. The first member 121, the second member 122, and the third member 123 are arranged along the longitudinal direction of the continuous footing 20 in a plan view. The connecting member 124 is fixed to the lower surface of the second member 122, and both ends thereof protrude downward from the first member 121 and the third member 123. The first member 121 and the third member 123 are fixed to both ends of the connecting member 124, and are thereby fixed to the second member 122. The headed studs S used for connecting with the sliding plate holding portion 130 are provided so as to protrude downward from the lower surfaces of the first member 121, the third member 123, and the connecting member 124.

[0038] In the second embodiment, when forming an opening O in the rising portion 21 of the continuous foundation 20, the width W of the opening O is set to a degree that allows the first member 121, the third member 123 of the sliding plate 120 in the seismic isolation device 100, and the portion excluding both ends of the sliding plate holding portion 130 below them, to be inserted. This width W is smaller than the width of the seismic isolation device 100 after construction is completed. After inserting the first member 121, the third member 123, and the lower portion of the sliding plate 120 of the seismic isolation device 100, excluding both ends of the sliding plate holding portion 130, the rising portion 21 is divided into upper and lower portions by widening the opening O, and then the first member 121, the third member 123, and both ends of the lower portion of the sliding plate holding portion 130 are installed.

[0039] According to the second embodiment described above, in addition to the same effects as those of the first embodiment described above, by reducing the width of the opening O when inserting the main parts of the seismic isolation device 100 (the first member 121 and third member 123 of the sliding plate 120, and the parts excluding both ends of the sliding plate holding portion 130 below them), the seismic isolation device 100 can be installed while sufficiently ensuring the strength of the parts of the rising portion 21 other than the opening O. This simplifies the reinforcement of the building and the secondary support of the building using hydraulic jacks, etc. Then, with the building's load loaded on the seismic isolation device 100, the rising portion 21 is cut and divided, and the first member 121, the third member 123, and both ends of the sliding plate holding portion 130 are provided, thereby expanding the size of the sliding plate 120 and ensuring that the building's horizontal displacement tolerance is sufficient to achieve a sufficient seismic isolation effect.

[0040] In addition, the sliding plate of the sliding support is usually formed as a single piece, and if the sliding plate is divided along the longitudinal direction of the rising part of the foundation as described above, it is presumed that the building in question has implemented the construction method of the seismic isolation device of the present invention.

[0041] (Variation) The present invention is not limited to the above-described embodiments, and various modifications and variations are possible, and these are also within the technical scope of the present invention. (1) The structure of the building, including the foundation, is not limited to the above-described embodiments and can be modified as appropriate. For example, in each embodiment, the building has undergone large-scale reinforcement, changing its brick masonry construction to reinforced concrete construction, but the structure, materials, shape, and use of the building are not limited to this and can be changed as appropriate. Furthermore, the location where the seismic isolation structure is installed is not limited to the rising portion of a continuous footing foundation, but may also be, for example, a rising portion protruding upward from a slab foundation having a foundation slab formed along a horizontal plane. (2) In each embodiment, the seismic isolation device is configured to have, for example, a sliding bearing, but the configuration of the seismic isolation device is not limited to this and can be changed as appropriate. For example, if the vertical dimension of the opening can be made relatively large, a seismic isolation rubber bearing having a seismic isolation rubber laminate may be used. (3) In each embodiment, the flat jack is provided above the slider and the sliding plate of the sliding bearing, but this is not limiting and it may be provided below. Furthermore, in each embodiment, a flat jack having a circular shape in a plan view is used, but this is not limiting, and a flat jack having another shape, such as a rectangular shape, may also be used. (4) In each embodiment, a new opening is formed specifically for inserting the seismic isolation device. However, if an appropriate opening for inserting the seismic isolation device already exists in the existing foundation, the seismic isolation device may be inserted into this opening, and then the other parts may be cut and separated. [Explanation of symbols]

[0042] 1 Building 10 Slab Foundation 20 Cloth foundation 21 Rising part 21U upper 21L lower O Opening 22 Footing 30 Seismic isolation rubber bearing 40 Exterior wall 50 Reinforced Wall 60 Reinforcement 61 volts 100 Seismic isolation device 110 Slider 120 Sliding Plate S Headed Stud 121 First member 122 Second member 123 third member 124 connecting member 130 Slide plate holder 140 Base plate 150 Flat jack 151 Main body 152 Inlet 153 Outlet 154 Upper pressure plate 155 Lower pressure plate M Mesh

Claims

1. A seismic isolation device is inserted into an opening formed in the rising part of the building's foundation, dividing a region of the rising portion other than the opening into upper and lower portions while the load of the building is applied to the seismic isolation device; a flat jack having a flat shape along a horizontal plane and expanding in the vertical direction by supplying injection material is provided on at least one of the upper and lower parts of the seismic isolation device; The dividing of the rising portion is performed after the injection material is supplied to the flat jack; Setting the pressure of the injection material supplied to the flat jack based on the weight distribution of the building; The weight distribution of the building is calculated using a three-dimensional model generated by three-dimensionally measuring the shape of the building. A method for constructing a seismic isolation device characterized by the above.

2. A seismic isolation device is inserted into an opening formed in the rising part of the building's foundation, A method for constructing a seismic isolation device, in which a region of the rising portion other than the opening is divided into upper and lower parts while a load from the building is applied to the seismic isolation device, A reinforcing material is installed along the longitudinal direction of the rising portion in a plan view in an upper region where the opening is formed in the existing skeleton of the building, After the reinforcement material is installed, the opening is newly formed at any position in the rising part of the foundation of the building. A method for constructing a seismic isolation device.

3. The seismic isolation device includes a sliding bearing, a flat jack having a flat shape along a horizontal plane and expanding in the vertical direction by supplying injection material is provided on at least one of the upper and lower parts of the seismic isolation device; dividing the rising portion after supplying the grout to the flat jack; 3. The method for constructing a seismic isolation device according to claim 2,

4. Setting the pressure of the injection material supplied to the flat jack based on the weight distribution of the building.

4. The method for constructing a seismic isolation device according to claim 3,

5. The seismic isolation device has a sliding plate having a sliding surface extending along a horizontal plane, and a sliding bearing having a slider that is in contact with the sliding surface of the sliding plate in a slidable state relative to the sliding plate.

5. A method for constructing a seismic isolation device according to claim 2, wherein the method comprises:

6. The sliding plate is configured by combining a plurality of members divided along the longitudinal direction in a plan view of the foundation, The width W of the opening is smaller than the width of the entire sliding plate after construction is completed, The central member of the sliding plate is installed in the opening before dividing the rising portion of the foundation into upper and lower parts; After dividing the rising portion of the foundation into upper and lower portions and widening the opening, the members at both ends of the sliding plate are installed in the portion including the widened portion of the opening.

6. The method for constructing a seismic isolation device according to claim 5.

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