JP2017057636A - Seismic isolation device replacement method and temporary support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismic isolation device replacement method and a temporary support device capable of curbing vibration of a structure due to an earthquake even when the same occurs while replacing a seismic isolation device and thereby safely executing replacement of the seismic isolation device.SOLUTION: A seismic isolation device replacement method comprises: a temporary installation process to temporarily layer a jack 1 which is extendable in a vertical direction on a temporary bearing 11 having a pair of upper and lower movable members which can be moved in a horizontal direction relative to each other in a space between an upper layer section C supported by an existing seismic isolation device IE and a lower layer section BD with the existing seismic isolation device IE placed thereon; an installation process to remove the existing seismic isolation device IE and to install a new seismic isolation device while supporting the upper layer section C by the temporary installed jack 1 and the temporary bearing 11 with the jack 1 extended; and a removal process to allow the new seismic isolation device to support the upper layer section C by contracting the jack 1 and then to remove the jack 1 and the temporary bearing 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method of exchanging an existing seismic isolation device for exchanging an existing seismic isolation device with a new seismic isolation device, and an existing seismic isolation device when replacing an existing seismic isolation device with a new seismic isolation device. It is related with the temporary support apparatus temporarily installed in order to support an upper layer part instead of.

  Conventionally, as a method for exchanging this type of seismic isolation device, for example, one disclosed in Patent Document 1 is known. In this replacement method, when replacing an existing seismic isolation device that supports a structure with a new seismic isolation device, the structure is first supported by a hydraulic jack. In this state, the existing seismic isolation device is removed, and after installing a new seismic isolation device, the hydraulic jack is removed.

JP-A-9-32344

  As described above, in the conventional replacement method, the structure is supported by the hydraulic jack during the replacement of the seismic isolation device. For this reason, if an earthquake occurs during the replacement of the seismic isolation device, the structure vibrates by transmitting the ground motion to the structure through the hydraulic jack, so that the replacement can be performed safely. It will disappear.

  The present invention has been made to solve the above-described problems. Even when an earthquake occurs during the exchange of the seismic isolation device, the vibration of the structure due to the earthquake is suppressed (the seismic force of the structure is reduced). It is possible to provide a seismic isolation device replacement method and a temporary support device that can be safely exchanged.

  In order to achieve the above object, the invention according to claim 1 is a method of replacing a seismic isolation device for exchanging an existing seismic isolation device that suppresses vibration of a structure with a new seismic isolation device, Between the upper layer part supported by the existing seismic isolation device and the lower layer part where the existing seismic isolation device is placed, a pair of upper and lower movable parts that can be displaced relative to each other in the horizontal direction. Temporary steps of temporarily mounting the temporary bearings having members on each other, and extending the temporary jacks to support the upper layer portion of the jacks and the temporary bearings. In addition to removing, the installation process of installing a new seismic isolation device, and the removal process of removing the jack and temporary support after supporting the upper layer by the new seismic isolation device by shortening the jack It is characterized by that.

  According to this configuration, in the temporary process, between the upper layer part supported by the existing seismic isolation device and the lower layer part on which the existing seismic isolation device is placed, the jack that can be vertically expanded and contracted, and the horizontal direction And a temporary support having a pair of upper and lower movable members that can be displaced relative to each other are temporarily installed in a stacked state. In the installation process, the temporary jack is extended to support the upper layer of the jack and the temporary support, and in that state, the existing seismic isolation device is removed and a new seismic isolation device is installed. The Further, in the removal process, the jack and the temporary support are removed after the upper layer is supported by the new seismic isolation device by shortening the jack.

  In this way, the upper layer portion is supported by the jack and the temporary support during the replacement of the seismic isolation device. For this reason, even if an earthquake occurs during the exchange, the pair of upper and lower movable members of the temporary support is displaced relatively, so that the transmission of earthquake motion from the lower layer to the upper layer via the temporary support is suppressed. The vibration of the structure due to the above can be suppressed appropriately, and consequently, the existing seismic isolation device can be replaced safely.

  The invention according to claim 2 is the method of replacing the seismic isolation device according to claim 1, wherein the jack is a flat jack.

  According to this configuration, the jack is a flat jack, is relatively light, and its vertical length (thickness) is relatively small, so that its workability can be improved.

  In addition, during the replacement of the seismic isolation device, when a large shearing force acts on the temporary bearing due to the occurrence of a relatively large earthquake, a large moment due to the shearing force acts on the jack. This moment increases as the vertical length of the jack increases.Therefore, when a large earthquake occurs during replacement of the seismic isolation device, if the vertical length of the jack is large, the moment acting on the jack If it becomes excessive, the jack may break down. According to the present invention, since the vertical length of the flat jack is small as described above, the moment acting on the jack can be reduced when a large earthquake occurs during the exchange of the seismic isolation device. It is possible to prevent the failure of the jack.

  According to a third aspect of the present invention, in the seismic isolation device replacement method according to the second aspect, in the installation step, the jack of the pair of upper and lower movable members in a state where the upper layer portion is supported by the jack and the temporary support. It further includes a connecting step of connecting the jack-side member on the side to the jack-side jack-side layer portion of the upper layer portion and the lower layer portion with a connecting member.

  According to this configuration, in the installation process, the jack side movable member on the jack side of the pair of upper and lower movable members is performed by performing the connecting process in a state where the upper layer portion is supported by the jack and the temporary support. It connects with the jack side layer part of the jack side of an upper layer part and a lower layer part by a connection member. In this way, the jack-side movable member and the jack-side layer portion located on the upper and lower sides of the jack are connected to each other by the connecting member, so that when a large earthquake occurs during the seismic isolation device replacement, The moment described in the invention can be borne by the connecting member, and hence the jack failure due to this moment can be prevented.

  According to a fourth aspect of the present invention, in the method for replacing a seismic isolation device according to any one of the first to third aspects, the temporary support is attached to a jack side member on the jack side of the pair of upper and lower movable members, A jack of the pair of upper and lower movable members, further comprising: a laminated rubber composed of a plurality of rubbers laminated in a vertical direction between the pair of movable members; and a sliding material attached to the laminated rubber and having a sliding property. The anti-jack side member on the opposite side is composed of a sliding plate having a sliding property, contacts the sliding material, and is connected to the anti-jack side layer portion on the opposite side of the jack in the upper layer portion and the lower layer portion. It is characterized by.

  According to this configuration, one of the pair of upper and lower movable members of the temporary support is configured by a sliding plate having sliding properties. In addition, a laminated rubber laminated in the vertical direction between the pair of upper and lower movable members is attached to the other of the pair of upper and lower movable members. The laminated rubber has sliding properties and contacts the sliding plate. Sliding material is attached. Therefore, when an earthquake occurs during the exchange of the seismic isolation device, it is possible to more appropriately suppress the vibration of the structure caused by the earthquake by obtaining the seismic isolation effect by the laminated rubber.

  In addition, when a large earthquake occurs during replacement of the seismic isolation device, slippage between the sliding plate and the sliding material prevents the transmission of earthquake motion from the lower layer to the upper layer via the temporary support. The vibration of the structure due to the earthquake can be appropriately suppressed. In this case, since the laminated rubber and the sliding material are attached to the jack side member, when the sliding occurs between the sliding plate and the sliding material, the laminated rubber and the sliding material are not displaced from the jack in the vertical direction, and the upper layer portion Can be properly supported by a jack and a temporary support. Further, unlike the present invention, when a laminated rubber type temporary support in which laminated rubber is integrally provided on a pair of upper and lower movable members is used, the pair of upper and lower movable members of the upper and lower movable members are appropriately obtained in order to appropriately obtain the seismic isolation effect. In order to ensure a sufficient movable range in the horizontal direction, the length of the laminated rubber in the vertical direction must be relatively large. On the other hand, according to the present invention, as described above, the generation of slip between the sliding plate and the sliding material suppresses the transmission of seismic motion from the lower layer portion to the upper layer portion via the temporary support, Compared with the case of using the laminated rubber type temporary support described above, the length of the laminated rubber in the vertical direction can be reduced, thereby improving the workability of the temporary support.

  Furthermore, when a large earthquake occurs during the exchange of the seismic isolation device, the shearing force acting on the temporary bearing can be reduced by causing a slip between the sliding plate and the sliding material. As a result, the moment acting on the jack described in the invention according to claim 2 can be reduced, so that it is possible to prevent the malfunction described above, that is, the failure of the jack due to the large moment acting.

  In order to achieve the above object, the invention according to claim 5 is supported by the existing seismic isolation device when replacing the existing seismic isolation device that suppresses the vibration of the structure with a new seismic isolation device. Temporary support device that is temporarily installed to support the upper layer in place of the existing seismic isolation device, and is removed after replacement of the new seismic isolation device. The upper layer and the existing seismic isolation device are placed In the state where it is temporarily placed between the lower layer part and has a pair of upper and lower movable members that can be displaced relative to each other in the horizontal direction, and is stacked on the jack between the upper layer part and the lower layer part. A temporary support, and the upper layer is supported by the jack and the temporary support by extending the jack.

  According to this configuration, when exchanging the seismic isolation device, a jack that can be expanded and contracted in the vertical direction and a temporary support are temporarily placed between the upper layer portion and the lower layer portion, and the jack is extended. Thus, the upper layer portion is supported by the jack and the temporary support. Moreover, the temporary support has a pair of upper and lower movable members that can be displaced relative to each other in the horizontal direction. For this reason, even if an earthquake occurs during the replacement of the seismic isolation device, the relative displacement of these movable members suppresses the transmission of earthquake motion from the lower layer to the upper layer via the temporary support. The vibration of the structure can be appropriately suppressed, so that the existing seismic isolation device can be replaced safely.

  The invention according to claim 6 is the temporary support device according to claim 5, wherein the jack is a flat jack.

  According to this configuration, the jack is a flat jack, is relatively light, and its vertical length (thickness) is relatively small, so that its workability can be improved.

  Further, during the replacement of the seismic isolation device, if a large shearing force acts on the temporary bearing due to the occurrence of a relatively large earthquake, a large moment due to the shearing force acts on the jack. This moment increases as the vertical length of the jack increases.Therefore, when a large earthquake occurs during replacement of the seismic isolation device, if the vertical length of the jack is large, the moment acting on the jack If it becomes excessive, the jack may break down. According to the present invention, since the length of the flat jack in the vertical direction is small as described above, even when a large earthquake occurs during the exchange of the seismic isolation device, the moment acting on the jack can be reduced. It is possible to prevent the failure of the jack.

  The invention according to claim 7 is the temporary support device according to claim 6, wherein the jack side member on the jack side of the pair of upper and lower movable members in a state where the upper layer portion is supported by the jack and the temporary support, It further comprises a connecting member for connecting to the jack side layer portion on the jack side of the upper layer portion and the lower layer portion.

  According to this configuration, the jack-side movable member on the jack side of the pair of upper and lower movable members is connected to the jack on the jack side of the upper layer portion and the lower layer portion while the upper layer portion is supported by the jack and the temporary support. It connects with a side layer part by a connection member. In this way, since the jack-side movable member and the jack-side layer portion located on the upper and lower sides of the jack are connected to each other by the connecting member, when a large earthquake occurs during the seismic isolation device replacement, The moment described in the invention can be borne by the connecting member, and hence the jack failure due to this moment can be prevented.

  The invention according to claim 8 is the temporary support device according to any one of claims 5 to 7, wherein the temporary support is attached to a jack side member on the jack side of the pair of upper and lower movable members, and the pair of upper and lower movable members. A laminated rubber made of a plurality of rubbers laminated in the vertical direction between the members, and a sliding material attached to the laminated rubber and having a sliding property, the opposite side of the jack of the pair of upper and lower movable members The anti-jack side member is composed of a sliding plate having a sliding property, is in contact with the sliding material, and is connected to the anti-jack side layer portion opposite to the jack of the upper layer portion and the lower layer portion. To do.

  According to this configuration, one of the pair of upper and lower movable members of the temporary support is configured by a sliding plate having sliding properties. In addition, a laminated rubber laminated in the vertical direction between the pair of upper and lower movable members is attached to the other of the pair of upper and lower movable members. The laminated rubber has sliding properties and contacts the sliding plate. Sliding material is attached. Therefore, when an earthquake occurs during the exchange of the seismic isolation device, it is possible to more appropriately suppress the vibration of the structure caused by the earthquake by obtaining the seismic isolation effect by the laminated rubber.

  In addition, when a large earthquake occurs during replacement of the seismic isolation device, slippage between the sliding plate and the sliding material prevents the transmission of earthquake motion from the lower layer to the upper layer via the temporary support. The vibration of the structure due to the earthquake can be appropriately suppressed. In this case, since the laminated rubber and the sliding material are attached to the jack side member, when the sliding occurs between the sliding plate and the sliding material, the laminated rubber and the sliding material are not displaced from the jack in the vertical direction, and the upper layer portion Can be properly supported by a jack and a temporary support. Further, unlike the present invention, when a laminated rubber type temporary support in which laminated rubber is provided integrally with a pair of upper and lower movable members is used, as described in the description of the invention according to claim 4, the waiver is provided. In order to obtain the seismic effect appropriately, the vertical length of the laminated rubber must be relatively large. On the other hand, according to the present invention, as described above, the generation of slip between the sliding plate and the sliding material suppresses the transmission of seismic motion from the lower layer portion to the upper layer portion via the temporary support, Compared with the case of using the laminated rubber type temporary support described above, the length of the laminated rubber in the vertical direction can be reduced, thereby improving the workability of the temporary support.

  Furthermore, when a large earthquake occurs during the exchange of the seismic isolation device, the shearing force acting on the temporary bearing can be reduced by causing a slip between the sliding plate and the sliding material. As a result, the moment acting on the jack described in the invention according to claim 6 can be reduced, so that it is possible to prevent the malfunction described above, that is, the failure of the jack due to the large moment acting.

It is a figure which shows schematically the temporary support apparatus by embodiment, the existing seismic isolation apparatus to which the exchange method by embodiment is applied, and the structure provided with this about the temporary process of the exchange method. It is an enlarged view which shows schematically the flat jack, temporary support, etc. of a temporary support apparatus about a temporary process. It is a figure which shows roughly the temporary support apparatus in the installation process of an exchange method, the existing seismic isolation apparatus, etc. It is an enlarged view which shows roughly the flat jack, temporary support, etc. in the connection process of the exchange method. It is a figure which shows roughly the temporary support apparatus in a setting process, a new seismic isolation apparatus, etc. It is a figure which shows roughly the new seismic isolation apparatus etc. in the removal process of an exchange method. It is a figure which shows roughly the temporary support apparatus etc. when a big earthquake generate | occur | produces in the installation process. It is a figure which shows roughly about the case where a flat jack is extended | expanded, loosening the anchor bolt which fixes a seismic isolation apparatus, such as a temporary support apparatus in an installation process, an existing seismic isolation apparatus.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 schematically illustrates a temporary support device according to an embodiment of the present invention, an existing seismic isolation device IE to which a replacement method according to an embodiment of the present invention is applied, and a structure C that is a high-rise building provided with the same. It shows. As shown in FIG. 1, in the structure C, an upper base beam BU is provided at the lower end thereof, and a plurality of pillars P (only one is shown) extending upward are integrally provided on the upper base beam BU. It has been. A lower foundation beam BD fixed to the ground is provided below the upper foundation beam BU.

  Furthermore, the upper foundation beam BU is integrally provided with a plurality of jack receiving portions RJ, and these jack receiving portions RJ are arranged on both the front, rear, left and right sides of the seismic isolation device IE. In addition, FIG. 1 has shown only the jack receiving part RJ arrange | positioned at the both sides of front and back of the seismic isolation apparatus IE, or both sides of right and left. Each jack receiving portion RJ is composed of a reinforced concrete block and protrudes downward from the upper base beam BU. The vertical length of the jack receiving portion RJ is between the flat jack 1 and the temporary support described below between the lower base beam BD. 11 is set to such a size that 11 can be arranged. In addition, anchor plates AP are embedded in the portions corresponding to the seismic isolation device IE in the upper and lower foundation beams BU and BD, respectively.

  The seismic isolation device IE is of a laminated rubber type, and a plurality of seismic isolation devices IE are provided between the upper base beam BU and the lower base beam BD described above (only one is shown in FIG. 1). Each seismic isolation device IE integrally includes a pair of upper and lower rectangular plate-like flanges FU and FD and a cylindrical laminated rubber RL provided between both flanges FU and FD. Insertion holes penetrating in the vertical direction are formed at the four corners of the upper and lower flanges FU and FD.

  The upper flange FU is fixed to the upper foundation beam BU using the anchor bolt AB and is in contact with the anchor plate AP. The anchor bolt AB is inserted into the insertion hole of the upper flange FU and is screwed into the screw hole of the upper base beam BU and the screw hole of the anchor plate AP. The lower flange FD is fixed to the lower base beam BD using the anchor bolt AB and is in contact with the anchor plate AP. The anchor bolt AB is inserted into the insertion hole of the lower flange FD, and is screwed into the screw hole of the lower base beam BD and the screw hole of the anchor plate AP. With the above configuration, the seismic isolation device IE is fixed while being placed on the lower foundation beam BD, and is fixed to the upper foundation beam BU. The structure C including the upper foundation beam BU is It is supported on the lower foundation beam BD by the seismic device IE.

  The temporary support device includes a flat jack 1 and a temporary support 11, and is temporarily installed on both the front, rear, left and right sides of one seismic isolation device IE when the seismic isolation device IE is replaced (a total of four). FIG. 1 shows only the flat jack 1 and the temporary support 11 provided on both the front and rear sides or both the left and right sides of the seismic isolation device IE.

  As shown in FIGS. 1 and 2, each flat jack 1 integrally includes a pair of upper and lower disk-shaped pressing plates 2, 2 and a hollow elastic portion 3 provided between the pressing plates 2, 2. And is configured to be extendable in the vertical direction. The stretchable part 3 is composed of a pair of upper and lower relatively thin steel plates joined to each other, and a hydraulic chamber 3a capable of supplying hydraulic pressure (for example, hydraulic pressure) is defined inside thereof. The expansion / contraction part 3 has an inner peripheral portion formed in a disk shape, an outer peripheral portion formed in a ring shape, and is disposed concentrically with the pressing plates 2 and 2 as a whole. 2 and 2 project radially outward. In FIG. 1, FIG. 3, FIG. 5, FIG. 7, and FIG.

  The expansion / contraction part 3 is connected to an injection pipe and a discharge pipe (both not shown) communicating with the hydraulic chamber 3a. When the flat jack 1 is extended in the vertical direction (jack-up), the hydraulic pressure is supplied to the hydraulic pressure chamber 3a through the injection pipe. Thereby, when the expansion-contraction part 3 swells up and down, the space | interval of the upper and lower press plates 2 and 2 becomes large, and the flat jack 1 is expanded (refer FIG. 3 etc. mentioned later). When the extended flat jack 1 is shortened (jack down), the hydraulic pressure supplied to the hydraulic chamber 3a is discharged through the discharge pipe. Thereby, when the expansion-contraction part 3 shrinks to an up-down direction, the space | interval of the up-and-down press plates 2 and 2 becomes small, and the flat jack 1 is shortened.

  The temporary bearing 11 is a so-called elastic sliding bearing, and includes a rectangular plate-shaped flange 12, a disk-shaped sliding material 13, and a plurality of disk-shaped layers stacked vertically between the flange 12 and the sliding material 13. A laminated rubber 14 made of rubber is integrally provided, and a sliding plate 15 that contacts the sliding material 13 is further provided. In the four corners of the flange 12, insertion holes are formed penetrating in the vertical direction (see FIG. 4 described later). The sliding material 13 and the sliding plate 15 are each made of a material having a relatively stable friction coefficient, for example, stainless steel and fluororesin. The setting of the friction coefficient of the sliding material 13 and the sliding plate 15 will be described later. In FIG. 1, FIG. 3, FIG. 5, FIG. 7 and FIG. 8 to be described later, for convenience, reference numerals of various parts such as the flange 12 and the sliding plate 15 of the temporary support 11 are omitted.

  In the temporary support 11 having the above-described configuration, when a force is applied to the flange 12 and the sliding plate 15 so as to relatively displace the both 12 and 15 in the horizontal direction, the laminated rubber 14 undergoes shear deformation, and the flange 12 and the sliding plate 15 are slipped. The plate 15 is relatively displaced in the horizontal direction. Then, when the force input to the flange 12 and the sliding plate 15 becomes relatively large and reaches a predetermined value, a slip occurs between the sliding member 13 integrated with the flange 12 and the sliding plate 15. When the structure C is supported by the flat jack 1 and the temporary support 11 as will be described later during the exchange of the seismic isolation device IE, this predetermined value is obtained when the relatively large earthquake occurs and the flange 12 and the slip. It is set to a magnitude equivalent to the force input to the plate 15. The setting is performed by setting the friction coefficient of the sliding material 13 and the sliding plate 15.

  Incidentally, the temporary support 11 is configured in the same manner as the “elastic sliding laminated rubber” disclosed on the website of the present applicant (http://www.adc21.com/index.html). Please refer to this for the detailed configuration.

  Next, the replacement method according to the present embodiment will be described with reference to FIGS. The process of the exchange method includes a temporary process, an installation process, and a removal process, and operations in each process are performed in this order. Hereinafter, the operation in each step will be described.

[Temporary process]
In the temporary installation step, as shown in FIGS. 1 and 2, the flat jack 1 and the temporary support 11 are stacked between the jack receiving portion RJ of the upper base beam BU and the lower base beam BD (temporary setting). To do. Thereby, the temporary support apparatus which consists of the flat jack 1 and the temporary support 11 is temporarily installed in the both front and back, right and left sides with respect to one seismic isolation apparatus IE as mentioned above. Further, in this case, the sliding plate 15 of the temporary support 11 is fixed to the lower base beam BD with a bolt or the like, and the flat jack 1 is placed on the flange 12 of the temporary support 11 and the flange 12 and the jack receiving portion. Arranged between RJs. In this state, the upper pressing plate 2 of the flat jack 1 is opposed to the jack receiving portion RJ with a slight gap (see FIG. 2).

[Installation process]
In the installation process subsequent to the temporary process, first, as shown in FIG. 3, the flat bolt 1 is extended after removing the anchor bolt AB that fixes the seismic isolation device IE. As a result, the upper and lower pressing plates 2 and 2 of the flat jack 1 are pressed against the flange 12 of the jack receiving portion RJ and the temporary support 11, respectively, and the structure C is supported by the flat jack 1 and the temporary support 11. Move C up. Next, in the state in which the structure C is supported by the flat jack 1 and the temporary support 11, the operation by the connecting process is performed. As a result, the flange 12 of the temporary support 11 is connected to the flange 12 as shown in FIG. Connect to the jack receiving part RJ and fix. The connecting bolt B is inserted into the insertion hole of the flange 12 and screwed into the jack receiving portion RJ.

  Next, as shown in FIG. 5, with the structure C supported by the flat jack 1 and the temporary support 11, and with the flange 12 connected to the jack receiving portion RJ, the existing seismic isolation device IE is renewed. Replace with seismic device IN. That is, the existing seismic isolation device IE is removed, and the new seismic isolation device IN is inserted into upper and lower flanges FU, FD insertion holes on the upper and lower foundation beams BU, BD anchor plate AP screw holes. Install to match each other.

[Removal process]
In the removal process following the installation process, first, after removing the connecting bolt B described above, the flat jack 1 is shortened to move the structure C downward, and the upper flange FU of the new seismic isolation device IN is moved upward. While making it contact the anchor plate AP of the foundation beam BU, the structure C is supported by the seismic isolation device IN. In this state, the upper pressing plate 2 of the flat jack 1 is opposed to the jack receiving portion RJ with a slight gap. Next, after fixing the upper and lower flanges FU, FD of the seismic isolation device IN to the upper and lower foundation beams BU, BD using the anchor bolt AB, as shown in FIG. 6, the flat jack 1 and the temporary support 11 is removed.

  As described above, according to the present embodiment, in the temporary process, between the structure C supported by the existing seismic isolation device IE and the lower base beam BD on which the existing seismic isolation device IE is placed. The flat jack 1 that can be expanded and contracted in the vertical direction and the temporary support 11 having the flange 12 and the sliding plate 15 that can be displaced relative to each other in the horizontal direction are temporarily installed in a stacked state. In addition, in the installation process, the temporary flat jack 1 is extended to support the structure C on the flat jack 1 and the temporary support 11, and in that state, the existing seismic isolation device IE is removed and new The seismic isolation device IN is installed. Further, in the removal step, the flat jack 1 is shortened to support the structure C on the new seismic isolation device IN, and then the flat jack 1 and the temporary support 11 are removed.

  Thus, the upper layer part is supported by the flat jack 1 and the temporary support 11 during the exchange of the seismic isolation device IE. For this reason, even if an earthquake occurs during the exchange, the flange 12 and the sliding plate 15 are relatively displaced, so that the transmission of the earthquake motion from the lower foundation beam BD to the structure C via the temporary support 11 is suppressed. Therefore, the vibration of the structure C due to the earthquake can be appropriately suppressed, and by extension, the existing seismic isolation device IE can be exchanged safely. Moreover, since the flat jack 1 is comparatively light and the length (thickness) of the up-down direction is comparatively small, its workability can be improved.

  Further, during the replacement of the seismic isolation device IE, when a large shearing force acts on the temporary support 11 due to the occurrence of a relatively large earthquake, a large moment resulting from the shearing force acts on the flat jack 1. As described above, since the vertical length of the flat jack 1 is small, the moment acting on the flat jack 1 can be reduced when a large earthquake occurs during the exchange of the seismic isolation device IE. The failure of the resulting flat jack 1 can be prevented.

  Further, in the installation process, the flange 12 on the flat jack 1 side of the flange 12 and the sliding plate 15 is made by performing the connecting process in a state where the structure C is supported by the flat jack 1 and the temporary support 11. The upper and lower foundation beams BU and BD are connected to the upper foundation beam BU on the flat jack 1 side by connecting bolts B. In this way, the upper foundation beam BU and the flange 12 respectively positioned on the upper and lower sides of the flat jack 1 are connected to each other by the connecting bolt B. Therefore, when a large earthquake occurs during the exchange of the seismic isolation device IE, This moment can be borne by the connecting bolt B, so that the failure of the flat jack 1 due to this moment can be prevented.

  Furthermore, when an earthquake occurs during the exchange of the seismic isolation device IE, the seismic isolation effect by the laminated rubber 14 of the temporary support 11 can be obtained, so that the vibration of the structure C due to the earthquake can be more appropriately suppressed. . In addition, as shown in FIG. 7, when a large earthquake occurs during the exchange of the seismic isolation device IE, a slip occurs between the sliding member 13 and the sliding plate 15, thereby causing a temporary support from the lower foundation beam BD. The transmission of the earthquake motion to the structure C via 11 is suppressed, and the vibration of the structure C due to the earthquake can be appropriately suppressed. In this case, since the laminated rubber 14 and the sliding material 13 are attached to the flange 12 on the flat jack 1 side, when sliding occurs between the sliding material 13 and the sliding plate 15, the sliding material 13 and the laminated rubber 14 are moved in the vertical direction. The structure C can be appropriately supported by the flat jack 1 and the temporary support 11 without being displaced from the flat jack 1.

  Further, as described above, since the sliding between the sliding member 13 and the sliding plate 15 is generated, the transmission of the earthquake motion from the lower foundation beam BD to the structure C via the temporary support 11 is suppressed. Compared with the case where a rubber-type temporary support is used, the length of the laminated rubber 14 in the vertical direction can be reduced, whereby the workability of the temporary support 11 can be improved.

  Furthermore, when a large earthquake occurs during the exchange of the seismic isolation device IE, a shearing force acting on the temporary support 11 can be reduced by causing a slip between the sliding member 13 and the sliding plate 15. Thereby, since the moment which acts on the flat jack 1 can be reduced, the failure of the flat jack 1 resulting from a large moment acting can be prevented.

  In addition, this invention can be implemented in various aspects, without being limited to the described embodiment. For example, in the embodiment, the flat jack 1 is extended after the anchor bolt AB is completely removed in the installation step. However, the flat jack 1 may be extended while loosening the anchor bolt AB. As a result, as shown in FIG. 8, when an earthquake occurs just before the seismic isolation device IE is removed during the replacement of the seismic isolation device IE, the seismic isolation effect by the laminated rubber RL of the seismic isolation device IE is obtained to some extent. Therefore, the vibration of the structure C due to the earthquake can be suppressed more appropriately. Further, in the embodiment, the flat jack 1 is placed on the temporary support 11, but conversely, the temporary support 11 may be placed on the flat jack 1. In this case, the sliding plate of the temporary support is connected to the upper foundation beam, the flange of the temporary support is brought into contact with the flat jack, and the flat jack is placed on the lower basic beam.

  Furthermore, in the embodiment, the jack in the present invention is the flat jack 1, but other suitable jacks such as a piston-type jack may be used. In addition, when using a jack that can be fixed with a bolt or the like, such as a piston-type jack, the jack is fixed to the jack side layer portion and the jack side member in the present invention, and the connecting bolt B may be omitted. Moreover, in embodiment, although the jack receiving part RJ is provided in the upper foundation beam BU, when not provided, steel materials, such as H-shaped steel, may be attached to an upper foundation beam as a jack receiving part. Of course, the flat jack may be brought into direct contact with the upper foundation beam without providing the jack receiving portion RJ.

  Furthermore, in the embodiment, the temporary support 11 in the present invention is an elastic sliding support, but other appropriate temporary support having a pair of upper and lower movable members that can be displaced relative to each other in the horizontal direction, for example, a seismic isolation device IE. Such a laminated rubber type temporary support may be used. Alternatively, a temporary bearing of a type in which the sliding material is directly attached to the flange without having the laminated rubber may be used. In the embodiment, the upper layer portion and the lower layer portion in the present invention are the structure C and the lower foundation beam BD, respectively, but may be an upper portion and a lower portion of a structure provided with a so-called intermediate seismic isolation layer.

  Furthermore, in embodiment, although the connection member in this invention is the connection bolt B, steel board | plate materials etc. may be sufficient. In the embodiment, the seismic isolation device IE (IN) is a laminated rubber type seismic isolation device, but other suitable seismic isolation devices, for example, a laminated rubber, a sliding material, and a sliding plate such as the temporary support 11 are used. May be a type of seismic isolation device (elastic sliding bearing), or a type of seismic isolation device having a sliding material and a sliding plate without having laminated rubber. Furthermore, in the embodiment, the structure C is a high-rise building, but it may be a steel tower or a bridge. It goes without saying that variations relating to the above embodiments may be appropriately combined and employed. In addition, it is possible to appropriately change the detailed configuration within the scope of the gist of the present invention.

C structure (upper layer)
BD Lower foundation beam (lower layer)
IE Existing seismic isolation device IN New seismic isolation device 1 Flat jack 11 Temporary bearing 12 Flange (movable member)
13 Sliding material 14 Laminated rubber 15 Sliding plate (movable member)

Claims (8)

A seismic isolation device replacement method for replacing an existing seismic isolation device that suppresses vibration of a structure with a new seismic isolation device,
Between the upper layer part supported by the existing seismic isolation device and the lower layer part on which the existing seismic isolation device is placed, a pair of upper and lower parts that can be vertically expanded and contracted and a pair of upper and lower parts that can be displaced relative to each other in the horizontal direction A temporary support for temporarily mounting the temporary support having the movable members in a state of being laminated with each other;
Installation in which the existing seismic isolation device is removed and the new seismic isolation device is installed while the upper layer is supported by the jack and the temporary support by extending the temporary jack. Process,
A removal step of removing the jack and the temporary support after the upper base portion is supported by the new seismic isolation device by shortening the jack; and
A method of exchanging seismic isolation devices, comprising:   The seismic isolation device exchanging method according to claim 1, wherein the jack is a flat jack.   In the installation step, with the upper layer portion supported by the jack and the temporary support, the jack side member on the jack side of the pair of upper and lower movable members is connected to the upper layer portion and the lower layer portion. The seismic isolation device exchanging method according to claim 2, further comprising a connecting step of connecting to a jack side layer portion on the jack side by a connecting member. The temporary support is attached to a jack side member on the jack side of the pair of upper and lower movable members, and a laminated rubber made of a plurality of rubbers stacked in the vertical direction between the pair of upper and lower movable members; A sliding material attached to the laminated rubber and having sliding properties;
The anti-jack side member on the opposite side to the jack of the pair of upper and lower movable members is formed of a sliding plate having a sliding property, and is in contact with the sliding material, and the upper layer portion and the lower layer portion of the upper layer portion and the lower layer portion. 4. The seismic isolation device exchanging method according to claim 1, wherein the seismic isolation device is connected to an anti-jack side layer portion opposite to the jack. When replacing an existing seismic isolation device that suppresses vibration of a structure with a new seismic isolation device, to support the upper layer part supported by the existing seismic isolation device instead of the existing seismic isolation device A temporary support device that is temporarily installed and removed after replacement of the new seismic isolation device,
A jack that is temporarily installed between the upper layer portion and the lower layer portion on which the existing seismic isolation device is placed, and is extendable in the vertical direction;
A pair of upper and lower movable members that can be displaced relative to each other in the horizontal direction, and a temporary support temporarily provided in a state of being stacked on the jack between the upper layer portion and the lower layer portion,
A temporary support device configured to support the upper layer portion with the jack and the temporary support by extending the jack.   The temporary support device according to claim 5, wherein the jack is a flat jack.   In a state where the upper layer portion is supported by the jack and the temporary support, the jack side member on the jack side of the pair of upper and lower movable members is connected to the jack side of the upper layer portion and the lower layer portion. The temporary support device according to claim 6, further comprising a connecting member for connecting to the jack side layer portion. The temporary support is attached to a jack side member on the jack side of the pair of upper and lower movable members, and a laminated rubber made of a plurality of rubbers stacked in the vertical direction between the pair of upper and lower movable members; A sliding material attached to the laminated rubber and having sliding properties;
The anti-jack side member on the opposite side to the jack of the pair of upper and lower movable members is formed of a sliding plate having a sliding property, and is in contact with the sliding material, and the upper layer portion and the lower layer portion of the upper layer portion and the lower layer portion. The temporary support device according to any one of claims 5 to 7, wherein the temporary support device is connected to an anti-jack side layer portion opposite to the jack.

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