JP5437113B2 - Load receiving method and device for seismic isolation device - Google Patents

Description

  The present invention relates to a load exchange method and device for a seismic isolation device for cutting an upper housing and a lower housing and attaching a seismic isolation device to the space in order to protect an existing building from damage caused by an earthquake. is there.

  A method is known in which a part of a foundation pile to which load is applied in an existing high-rise building is cut and a seismic isolation device is installed in the space (Patent Document 1). As shown in FIG. 8, in this method, a plurality of auxiliary piles 13 are driven around the foundation pile 11 of the building 10, and a first space is formed in the space between the upper end portion of these auxiliary piles 13 and the building 10. The support jack 14 is interposed to support the building 10, the foundation pile 11 and the building 10 are separated from each other, and a pressure plate 12 is formed below the building 10. The second support jack 15 and the oil jack 16 are installed, the seismic isolation device 17 is mounted on the second support jack 15 and the oil jack 16, and the seismic isolation device 17 is constructed via the upper support portion 18. The oil jack 16 is removed after close contact with the lower surface of the object 10, and the second support jack 15 is fixed to the pressure-resistant panel 12 by the lower support portion 19. As shown in FIG. 9, the first support jack 14 and the oil jack 16 fix the lower base plate 21, push the upper base plate 20 together with the screw 23 with the oil jack to closely contact the building 10, and the nut While rotating 24, the straight tube 22 is contacted and fixed.

  It replaces with the cutting | disconnection of a foundation pile, and the method of cut | disconnecting some pillars 27 of the existing building and installing a seismic isolation apparatus is known (patent document 2). In this method, as shown in FIG. 7, column reinforcement 28 and beam reinforcement 29 are applied to the cut portions of the existing column 27 of the building 10, brackets are attached above and below the cut portions, and jacks are placed between the upper and lower brackets. The seismic isolation device 17 is installed in a space in which a part of the pillar 27 is cut after receiving the load of the building 10 and the upper and lower brackets and jacks are removed after the installation.

JP-A-10-246004. JP2003-161044A.

The seismic isolation device 17 is a general-purpose product in which a plurality of thin steel plates and rubber plates are alternately laminated between an upper steel plate and a lower steel plate and the outer periphery is covered with rubber.
When such a seismic isolation device 17 is installed by the methods of Patent Documents 1 and 2, if the hydraulic jack that has supported the load of the building 10 during the installation work is removed, the total load of the building 10 is applied to the seismic isolation device 17. since the painter Cal seismic isolation device 17, there is a possibility that the buildings 10 by elastic deformation sinks few mm.
In general, if the allowable displacement is small, such as important existing structures, aging existing structures, statically indeterminate structures, etc. It is necessary to introduce work (a method of introducing a load in advance).

More specifically, according to Patent Document 1, after the seismic isolation device 17 is closely adjusted to the building 10 side and the second support jack 15 is supported and fixed, the oil jack 16 is removed and the second support jack 15 is removed. The seismic isolation device 17 is completely replaced by performing a fixing operation on the lower support portion 19. It is described that when one seismic isolation load replacement is completed, the same work is repeated for other foundation piles.
However, when releasing the first support jacks 14 at a plurality of locations, adjusting the subsidence of the building due to the elastic deformation of the seismic isolation device when the support jack is released and the load is transferred to the seismic isolation device. There is no description about the adjustment preloading work. If the sinking is not adjusted, the building 10 will sink due to the elastic deformation of the seismic isolation device when the first support jack 14 is released.

  According to Patent Document 2, the seismic isolation device has a level adjustment bolt for level adjustment, and the level adjustment including the amount of subsidence of the seismic isolation device due to the burden of the vertical load is performed when the jack is opened. Although it is described, there is no detailed description on how and in what order the load is transferred to a plurality of seismic isolation devices.

  The present invention has been made to solve the above problems, and when installing a plurality of seismic isolation devices in a building, the subsidence of the elastic deformation of the seismic isolation device does not occur in the building. Thus, an object of the present invention is to provide a replacement method and apparatus that enables replacement of seismic isolation devices.

The load exchange method of the seismic isolation device according to the present invention is as follows:
A first step of temporarily mounting a load of the building by installing a temporary jack between the upper and lower portions of the installation of the seismic isolation device in the building;
A second step of forming a seismic isolation device installation space between the upper housing and the lower housing in the building;
The seismic isolation device is attached to one of the upper and lower housings in the seismic isolation device installation space, and the surface of the seismic isolation device that is not in contact with the housing and the other surface of the upper and lower housings In between, four wedge devices composed of a fixed wedge plate and a movable wedge plate are arranged in a cross shape so that the movable wedge plate is press-fitted toward the center, and these wedge devices are arranged in a cross shape. Four replacement jacks are arranged one by one so that the corners are formed on the side surfaces adjacent to each other of the four wedge devices, one part of which overlaps the outer peripheral edge of the seismic isolation device. A third step of placing and attaching;
A fourth step of receiving a temporary receiving load of the temporary receiving jack by the replacement jack;
A fifth step of bringing the wedge device into close contact so that there is no gap between the seismic isolation device and the housing;
After the fifth step , the replacement jack and the temporary receiving jack are removed, and a sixth step of integrating the wedge device with the housing is characterized.

According to invention of Claim 1,
A first step of temporarily mounting a load of the building by installing a temporary jack between the upper and lower portions of the installation of the seismic isolation device in the building;
A second step of forming a seismic isolation device installation space between the upper housing and the lower housing in the building;
The seismic isolation device is attached to one of the upper and lower housings in the seismic isolation device installation space, and the surface of the seismic isolation device that is not in contact with the housing and the other surface of the upper and lower housings In between, four wedge devices composed of a fixed wedge plate and a movable wedge plate are arranged in a cross shape so that the movable wedge plate is press-fitted toward the center, and these wedge devices are arranged in a cross shape. Four replacement jacks are arranged one by one so that the corners are formed on the side surfaces adjacent to each other of the four wedge devices, one part of which overlaps the outer peripheral edge of the seismic isolation device. A third step of placing and attaching;
A fourth step of receiving a temporary receiving load of the temporary receiving jack by the replacement jack;
A fifth step of bringing the wedge device into close contact so that there is no gap between the seismic isolation device and the housing;
After this fifth step , the replacement jack and the temporary receiving jack are removed, and the sixth step of integrating the wedge device with the housing is included, so the temporary receiving load of the temporary receiving jack by the replacement jack is changed. In addition, an adjustment preloading work in which a load of a building is applied to the seismic isolation device in advance is performed by bringing the wedge device into close contact so that there is no gap between the seismic isolation device and the housing. Therefore, even if the seismic isolation device is replaced, the building will not sink due to the elastic deformation of the seismic isolation device. Therefore, even if the jack is released, the building will not be damaged due to abnormal stress. There is nothing.

According to the invention of claim 1 ,
After the fifth step of bringing the wedge device into close contact with the seismic isolation device and the upper housing or the lower housing, the replacement jack and the temporary receiving jack are removed, and the wedge device is integrated with the housing. The seismic isolation device is fixed in the correct position. In addition, the wedge device is integrated with the housing, but the wedge device is cheaper and more economical than using a jack with a safety nut mechanism. By the way, the present invention, which uses a wedge device and a replacement jack together, removes the replacement jack after replacement and integrates it with the building, uses a replacement jack as before, and replaces the jack after replacement. The cost can be reduced to 1/2 to 1/3 as compared with the case of burying without removing and integrating with a building.

According to the invention of claim 2 Symbol placement,
The second step is to cut the pillar or existing pile of the building and form a seismic isolation device installation space between the upper and lower frame of this pillar or existing pile. Even if the permissible displacement is small, such as aging existing structures and non-static structures, work can be performed safely.

According to the invention of claim 3 Symbol mounting,
In the second step, the seismic isolation device installation space was formed between the lower frame consisting of the foundation pile separately buried in the ground and the upper frame consisting of a part of the building. Seismic isolation of the built structure is performed reliably.

According to the invention of claim 4 Symbol mounting,
In the seismic isolation device load transfer device that installs the seismic isolation device in the seismic isolation device installation space formed between the upper and lower housings in the building to protect the building from vibrations,
A temporary jack that temporarily receives the load of the building when forming the seismic isolation device installation space;
A seismic isolation device attached in contact with one of the upper and lower housings in the seismic isolation device installation space;
A fixed wedge plate and a movable wedge plate are provided between the surface of the seismic isolation device that is not in contact with the frame and the other surface of the upper and lower frames, and the movable wedge plate is at the center. 4 wedge devices arranged in a cross shape so as to be pressed into
The four wedge devices are formed at the corners formed on the side surfaces adjacent to each other of the four wedge devices arranged in a cross shape and partially overlap the outer peripheral edge of the seismic isolation device. And four replacement jacks that replace the temporary receiving load of the temporary receiving jack, and press fit the movable wedge plate of the wedge device toward the center. Since the replacement jack and the temporary receiving jack are removed so that the gap between the seismic isolation device and the housing is eliminated, the wedge device is integrated with the housing . The elastic deformation of the seismic isolation device due to the load of the building at the time of replacement can be removed in advance by the wedge device, and the replacement can be surely performed without generating abnormal stress on the building.

Further, according to the invention of claim 4 Symbol mounting,
In the wedge device, four wedge devices comprising a fixed-side wedge plate and a movable-side wedge plate are arranged in a cross shape so that the movable-side wedge plate is press-fitted toward the center. Since four replacement jacks are arranged at the four corners, the load can be replaced in a balanced and stable manner.

It is a front view which shows Example 1 of the load exchange method and apparatus of a seismic isolation apparatus by this invention. It is a top view of the load exchange method and apparatus of the seismic isolation apparatus by this invention. It is the detailed front view of the load exchange method and apparatus of the seismic isolation apparatus by this invention. It is a side view of the wedge apparatus used for the load exchange method and apparatus of the seismic isolation apparatus of this invention. It is a side view which shows the other example of the wedge apparatus used for the load exchange method and apparatus of the seismic isolation apparatus of this invention. It is a top view which shows Example 2 of the load exchange method and apparatus of the seismic isolation apparatus by this invention. It is explanatory drawing which shows the prior art example which cut | disconnected some columns 27 and installed the seismic isolation apparatus 17. FIG. It is explanatory drawing which shows the prior art example which cut | disconnected some foundation piles 11 and installed the seismic isolation apparatus 17. FIG. It is a perspective view of the 1st support jack 14 in FIG.

The load exchange method of the seismic isolation device of the present invention is:
A first step of temporarily mounting a load of the building 10 by installing a temporary receiving jack 35 between the upper and lower portions of the installation site of the seismic isolation device 17 in the building 10;
A second step of forming a seismic isolation device installation space 52 between the upper housing 30 and the lower housing 31 in the building 10;
The seismic isolation device 17 is attached to either one of the upper housing 30 and the lower housing 31 in the seismic isolation device installation space 52, and the surface of the seismic isolation device 17 that is not in contact with the housing, the upper housing 30 and the lower housing 31. A third step of mounting the replacement jack 39 and the wedge device 42 side by side between either one of the other surfaces;
A fourth step of replacing the temporary receiving load of the temporary receiving jack 35 by the replacement jack 39;
A fifth step of causing the wedge device 42 to closely contact the seismic isolation device 17 and the housing (upper housing 30 or lower housing 31) so that there is no gap;
It is characterized by comprising a sixth step of removing the replacement jack 39 and the temporary receiving jack 35 and integrating the wedge device 42 with the housing.
Consists of.

In the second step, the column 27 or the existing pile of the building 10 is cut to form the seismic isolation device installation space 52 between the upper frame 30 and the lower frame 31 of the column 27 or the existing pile. Can do.
Moreover, in this 2nd process, the seismic isolation apparatus installation space 52 can also be formed between the lower housing which consists of a foundation pile buried in the ground, and the upper housing which consists of a part of building.

The load receiving device of the seismic isolation device of the present invention is
In the load exchange device for a seismic isolation device that installs the seismic isolation device 17 in the seismic isolation device installation space 52 formed between the upper housing 30 and the lower housing 31 in the building 10 to protect the building 10 from vibrations.
A temporary jack 35 that temporarily receives the load of the building 10 when the seismic isolation device installation space 52 is formed;
The seismic isolation device 17 attached in contact with either one of the upper housing 30 and the lower housing 31 in the seismic isolation device installation space 52;
A replacement jack that is attached between a surface of the seismic isolation device 17 that is not in contact with the housing and either one of the upper housing 30 and the lower housing 31 and replaces the temporary receiving load of the temporary receiving jack 35. 39,
A wedge device attached side by side with the replacement jack 39 is provided so as to close the gap between the seismic isolation device 17 and the housing (upper housing or lower housing).

In the wedge device 42, four wedge devices 42 including a fixed-side wedge plate 40 and a movable-side wedge plate 41 are arranged in a cross shape so that the movable-side wedge plate 41 is press-fitted toward the center. Four replacement jacks 39 are arranged at the four corners of the wedge device 42.
In addition, the wedge device 42 has two substantially fixed upper and lower wedge plates 40 having substantially the same area as the pressure receiving surface of the seismic isolation device 17 and one movable wedge plate 41 press-fitted between the two. The movable wedge plate 41 may be provided with a hydraulic mechanism for press-fitting the movable wedge plate 41, and the replacement jack 39 and the wedge device 42 may be used together.
The number of wedge devices 42 and replacement jacks 39 is not limited to four, and the wedge devices 42 are arranged in a cross shape, and four replacement jacks are provided at the four corners of the cross-shaped wedge device 42. It is not restricted to the example which arrange | positions 39. FIG.

Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 shows an example of installing the seismic isolation device 17 by cutting a part of a plurality of vertical pillars 27 on the basement floor in the existing building 10 to form a seismic isolation device installation space 52 as in FIG. Show.
The seismic isolation device installation space 52 is formed by cutting a part of an existing pile such as the existing foundation pile 11 as shown in FIG. Furthermore, the example formed between the foundation pile newly embed | buried separately in the ground and a building may be sufficient.
Hereinafter, a case where a part of the pillar 27 is cut to form the seismic isolation device installation space 52 will be described.

(1) In FIG. 1, the upper bracket 32 is clamped from both sides to the upper side of the cut portion of the column 27 before cutting and fixed with the PC steel material 34, and the lower bracket 33 is also clamped from both sides to the lower side. And fix with PC steel 34. This fixing method is not limited to the illustrated example, and may be an anchor bolt or the like.

(2) A temporary receiving jack 35 is installed between the upper bracket 32 and the lower bracket 33 to temporarily receive the load of the building 10. Attachment of the lower bracket 33 on the lower side may be an auxiliary pile 13 provided separately as shown in FIG. 8 instead of the pillar 27 shown in FIG.

(3) After being temporarily received by the temporary receiving jack 35, a part of the column 27 between the upper bracket 32 and the lower bracket 33 is cut with a wire saw or the like. The code | symbol 36 of FIG. 3 has shown the cut surface. By cutting, the pillar 27 is separated into the upper housing 30 and the lower housing 31.

(4) Anchor bolts 53 are embedded in the cut surface 36 on the upper surface of the lower housing 31 as necessary, and finished in a horizontal plane with a molding layer 37 such as a non-shrink mortar. Anchor bolts 53 are embedded in the cut surface 36 on the lower surface of the upper housing 30 as necessary, and finished in a horizontal plane with a molding layer 37 such as a non-shrink mortar. Each of these horizontal surfaces is fixed with an anchor bolt 53 in which a base plate 38 is embedded. In this way, the seismic isolation device installation space 52 is formed.

(5) The seismic isolation device 17 is placed on the base plate 38 on the lower housing 31 side in the seismic isolation device installation space 52, and the lower base plate of the seismic isolation device 17 is fixed with the anchor bolt 53 or the like. A base plate 38 is fixed to the upper base plate of the seismic isolation device 17, and four replacement jacks 39 and four wedge devices 42 are placed on the base plate 38. Each of the four wedge devices 42 includes a fixed wedge plate 40 and a movable wedge plate 41, and is arranged in a cross shape with the thick side of the fixed wedge plate 40 as the center. It is fixedly attached to the base plate 38 on the side. The four replacement jacks 39 are arranged at the four corners where the wedge devices 42 are arranged in a cross shape.

(6) The four replacement jacks 39 are hydraulically extended to replace the load of the building 10 in place of the temporary receiving jack 35 temporarily received. Then, the seismic isolation device 17 receives the load of the building 10 and elastically deforms according to the load. In this state, the movable side wedge plate 41 is inserted so that the outer peripheral side becomes the thick side, and is squeezed between the fixed side wedge plate 40 and the base plate 38 with a hammer or the like. The inner side of the movable side wedge plate 41 is inserted so that the insertion gap of the movable side wedge plate 41 remains. The movable-side wedge plate 41 only needs to be in close contact with the upper and lower surfaces without any gaps, and need not be struck harder than necessary. The angle of the sliding surface between the fixed-side wedge plate 40 and the movable-side wedge plate 41 is set to a small angle so that the movable-side wedge plate 41 does not move in the horizontal direction due to a vertical load. In this way, the load is transferred from the replacement jack 39 to the wedge device 42.

(7) When the load is replaced by the four wedge devices 42, the replacement jack 39 is opened and removed from the base plate 38. Further, the temporary receiving jack 35 is also removed.

(8) The surroundings of the four wedge devices 42 are integrated with the upper housing 30 by the non-shrink mortar 49. The wedge device 42 does not require reinforcement such as a reinforcing bar because the area of the fixed side wedge plate 40 and the movable side wedge plate 41 is large, but a reinforcing bar 54 may be inserted if necessary.

  In the above-described embodiment, the seismic isolation device 17 is installed on the lower side, and the replacement jack 39 and the wedge device 42 are installed on the upper side thereof.

In the first embodiment, four replacement jacks 39 and four wedge devices 42 are used. However, as shown in FIGS. 4 to 6, one wedge device 42 is driven by a hydraulic mechanism 46 and received. The replacement jack 39 and the wedge device 42 may be used together.
More specifically, in FIG. 5 and FIG. 6, a substantially rectangular wedge device 42 sized to cover the entire seismic isolation device 17 is installed on the base plate 38 placed on the seismic isolation device 17. In this wedge device 42, two upper and lower fixed wedge plates 40 that are thicker toward the tip are fixedly attached to a base plate 38 on the seismic isolation device 17 side and a base plate 38 on the upper housing 30 side. One movable wedge plate 41 is inserted between the two wedge devices 42, and three hydraulic mechanisms 46 are detachably attached to the thick side of the movable wedge plate 41.

  Three movable steel plates 43 are inserted into the movable wedge plate 41 at equal intervals, protrude from the distal end of the movable wedge plate 41 leaving a press-fitting gap, and further, the distal end surfaces of the two fixed wedge plates 40 And a nut 48 is screwed into the projecting portion. A hydraulic mechanism 46 is attached to a base end portion of the movable wedge plate 41 by attaching a case 51 with a window, and a nut 48 is screwed into a PC steel rod 43 penetrating the hydraulic mechanism 46. Further, the refilling nut 45 is screwed in the case 51 with the window, and the two PC steel bars 43 are connected by the coupler 44.

In the configuration as described above, when a tensile force is applied to the PC steel rod 43 by the hydraulic mechanism 46, the movable wedge plate 41 is pushed rightward in FIG. 5 and a vertical force is applied between the upper housing 30 and the lower housing 31. Will occur. Here, when the horizontal force of the hydraulic mechanism 46 per unit is 35 tons, the angle θ of the wedge device 42 is 5 degrees, and the friction coefficient μ is 0.1, the vertical force is generated about 185 tons.
The wedge device 42 replaces the load of the building 10 in place of the temporary receiving jack 35 previously provisionally received. Then, the seismic isolation device 17 is elastically deformed according to the load of the building 10. In this state, the repositioning nuts 45 at the three locations are rotated toward the PC steel rod 43 side and are brought into close contact with the end surface of the PC steel rod 43 to fix the movable side wedge plate 41. When the movable wedge plate 41 is fixed, the PC steel rod 43 on the left side in the figure connected by the coupler 44 is removed, and the hydraulic mechanism 46 and the like are removed. Further, the temporary receiving jack 35 is also removed.
The wedge device 42 is embedded with non-shrink mortar 49 and integrated with the upper housing 30.

  In the embodiment shown in FIG. 5, the wedge device 42 is constituted by three pieces of the upper and lower fixed wedge plates 40 and the middle movable wedge plate 41. However, as shown in FIG. Two wedge devices 42 each having one movable side wedge plate 41 may be used. In this case, when the movable wedge plate 41 is difficult to slide on the base plate 38, the sliding bed 50 may be interposed between the movable wedge plate 41 and the base plate 38. In FIG. 4, the drive mechanism by the hydraulic mechanism 46 as shown in FIG. 5 is omitted.

In the embodiment shown in FIG. 2, the four wedge devices 42 are arranged in a cross shape so that the movable wedge plate 41 is press-fitted toward the center, and four wedge devices 42 are arranged at the four corners of the cross-shaped wedge device 42. Although the replacement jack 39 has been arrange | positioned, it is not restricted to this.
For example, one or more wedge devices 42 and one or more replacement jacks depending on the shape and size of the upper housing 30 and the lower housing 31, the shape and capacity of the wedge device 42 and the replacement jack 39, etc. It can be configured by any combination of 39 and any arrangement.

DESCRIPTION OF SYMBOLS 10 ... Building, 11 ... Foundation pile, 12 ... Pressure-resistant board, 13 ... Auxiliary pile, 14 ... 1st support jack, 15 ... 2nd support jack, 16 ... Oil jack, 17 ... Seismic isolation device, 18 ... Upper part Bearing part, 19 ... Lower bearing part, 20 ... Upper base plate, 21 ... Lower base plate, 22 ... Straight pipe, 23 ... Spear, 24 ... Nut, 25 ... Auxiliary plate, 26 ... Underground beam, 27 ... Column, 28 ... column reinforcement, 29 ... beam reinforcement, 30 ... upper housing, 31 ... lower housing, 32 ... upper bracket, 33 ... lower bracket, 34 ... PC steel, 35 ... temporary jack, 36 ... cut surface, 37 ... molding layer, 38 ... Base plate, 39 ... Replacement jack, 40 ... Fixed wedge plate, 41 ... Movable wedge plate, 42 ... Wedge device, 43 ... PC steel bar, 44 ... Coupler, 45 ... Replacement nut, 46 ... Hydraulic mechanism 47 ... Reaction washer, 48 ... Nut , 49 ... integrated with the skeleton by non-shrink mortar, 50 ... sliding bed, 51 ... windowed casing, 52 ... isolator installation space, 53 ... anchor bolt, 54 ... reinforcing steel.

Claims (4)

A first step of temporarily mounting a load of the building by installing a temporary jack between the upper and lower portions of the installation of the seismic isolation device in the building;
A second step of forming a seismic isolation device installation space between the upper housing and the lower housing in the building;
The seismic isolation device is attached to one of the upper and lower housings in the seismic isolation device installation space, and the surface of the seismic isolation device that is not in contact with the housing and the other surface of the upper and lower housings In between, four wedge devices composed of a fixed wedge plate and a movable wedge plate are arranged in a cross shape so that the movable wedge plate is press-fitted toward the center, and these wedge devices are arranged in a cross shape. Four replacement jacks are arranged one by one so that the corners are formed on the side surfaces adjacent to each other of the four wedge devices, one part of which overlaps the outer peripheral edge of the seismic isolation device. A third step of placing and attaching;
A fourth step of receiving a temporary receiving load of the temporary receiving jack by the replacement jack;
A fifth step of bringing the wedge device into close contact so that there is no gap between the seismic isolation device and the housing;
A seismic isolation device load transfer method comprising a sixth step of removing the replacement jack and the temporary support jack and integrating the wedge device with the housing after the fifth step . The second step, claims, characterized in that so as to form a seismic isolation device installation space between the upper skeleton and lower skeleton of this column or existing pile by cutting the column or existing pile of buildings 1 Symbol mounting load bearing replacement method of the seismic isolation device. The second step, claims, characterized in that so as to form a seismic isolation device installation space between the upper skeleton consisting of a portion of the lower skeleton and buildings made of foundation pile which is separately buried in the ground 1 Symbol mounting load bearing replacement method of the seismic isolation device. In the seismic isolation device load transfer device that installs the seismic isolation device in the seismic isolation device installation space formed between the upper and lower housings in the building to protect the building from vibrations,
A temporary jack that temporarily receives the load of the building when forming the seismic isolation device installation space;
A seismic isolation device attached in contact with one of the upper and lower housings in the seismic isolation device installation space;
A fixed wedge plate and a movable wedge plate are provided between the surface of the seismic isolation device that is not in contact with the frame and the other surface of the upper and lower frames, and the movable wedge plate is at the center. 4 wedge devices arranged in a cross shape so as to be pressed into
The four wedge devices are formed at the corners formed on the side surfaces adjacent to each other of the four wedge devices arranged in a cross shape and partially overlap the outer peripheral edge of the seismic isolation device. And four replacement jacks that replace the temporary receiving load of the temporary receiving jack, and press fit the movable wedge plate of the wedge device toward the center. And removing the replacement jack and the temporary receiving jack so that the wedge device is integrated with the housing. Load receiving device for seismic devices.

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