JP6593952B2 - How to install the seismic isolation device - Google Patents

Description

  The present invention relates to a method for mounting a seismic isolation device.

  2. Description of the Related Art Conventionally, seismic isolation structures are known in which an upper housing such as a building is supported by a lower housing such as a foundation via a seismic isolation device. This seismic isolation device includes a laminated rubber, a lower flange provided under the laminated rubber, and an upper flange provided on the laminated rubber. The lower flange is fixed with a bolt to the lower plate driven into the lower casing, and the upper flange is fixed with a bolt to the upper plate driven into the upper casing.

When exchanging such a seismic isolation device, for example, the following method has been proposed.
In the first method, a temporary support column is installed around the seismic isolation device, and the upper frame is jacked up by the temporary support column, so that the upper frame is temporarily supported by the temporary support column and the load applied to the seismic isolation device. Is released. Next, the laminated rubber is cooled and contracted, thereby reducing the height dimension of the laminated rubber and creating a gap between the laminated rubber and the upper casing. In this state, the laminated rubber is replaced (see Patent Documents 1 and 2).

  In the second method, a plate is interposed in advance between the laminated rubber and the upper casing or the lower casing. When replacing the laminated rubber, a temporary support post is installed around the seismic isolation device, and the upper case is jacked up by the temporary support post to temporarily support the upper case with the temporary support post. Release the load applied to. Next, by shifting the plate in the horizontal direction and removing it, a gap corresponding to the thickness of the plate is generated between the laminated rubber and the housing. In this state, the laminated rubber is replaced (see Patent Documents 3 and 4).

Japanese Patent Application Laid-Open No. 9-221921 JP-A-10-88824 Japanese Patent Laid-Open No. 11-141179 JP 2005-220947 A

  By the way, there is a case where the lower casing and the upper casing are displaced in the horizontal direction due to different contraction of the casing or residual deformation after the earthquake. In this case, with the conventional method, the existing seismic isolation device can be removed from the housing, but it is difficult to attach a new seismic isolation device. That is, when attaching a new seismic isolation device, if one of the upper and lower flanges of the new seismic isolation device is fixed to the housing, the other flange will be displaced relative to the housing.

  The present invention is an installation of a seismic isolation device that can easily attach a seismic isolation device between a lower housing and an upper housing even when the lower housing and the upper housing are displaced in the horizontal direction. It aims to provide a method.

  According to the first aspect of the present invention, the seismic isolation device is attached between the lower housing (for example, lower housing 3 described later) and the upper housing (for example, upper housing 4 described later). The seismic isolation device is attached to a laminated rubber (for example, a laminated rubber 11 described later) and a lower flange (for example, a lower flange provided under the laminated rubber). A lower flange 12) described later, and an upper flange (for example, an upper flange 13 described later) provided on the laminated rubber, and the seismic isolation device is interposed between the lower casing and the upper casing. Placing the lower flange opposite the lower housing, and placing the upper flange opposite the upper housing (for example, step S2 described later), and one of the lower flange and the upper flange, One flange A reaction force is applied to the lower casing and the upper casing by the step of fixing to the opposing casing (for example, step S4 to be described later) and a moving device (for example, the moving apparatus 50 to be described later). A step of adjusting the position by horizontally moving the other of the flanges (for example, steps S5 to S7 described later), and a step of fixing the other flange to a housing facing the other flange (for example, a step described later). S8).

  According to this invention, one of the upper and lower flanges is fixed to the housing, and in this state, the other unfixed flange is horizontally moved by the jack to adjust the position. Therefore, since the other unfixed flange can be easily adjusted to the position of the housing, the seismic isolation device can be mounted on the lower housing even when the lower housing and the upper housing are displaced in the horizontal direction. Can be easily attached between the upper housing and the upper housing.

The seismic isolation device mounting method according to claim 1 , wherein the moving device includes a housing-side jig (for example, a housing-side jig 51 described later) attached to the lower housing and the upper housing, and the other flange. A flange-side jig (for example, a flange-side jig 52 described later) and a jack (for example, a center-hole jack 53 described later) for moving the flange-side jig relative to the housing-side jig in the horizontal direction. ), A bolt insertion hole (for example, a bolt insertion hole 121 described later) is formed in the other flange, and a pin (for example, a pin inserted into the bolt insertion hole is formed in the flange side jig). A pin 55) to be described later is provided.

  According to the present invention, since the pin is provided on the flange side jig, and this pin is inserted into the bolt insertion hole and locked, the other unfixed flange can be easily moved horizontally by driving the jack. it can.

The seismic isolation device mounting method according to claim 1 is characterized in that a bolt insertion hole (for example, a bolt insertion hole 131 to be described later) is formed in the one flange, and a female screw is provided in the housing facing the one flange. Part (for example, a female thread part 31 described later) is formed, one end side is inserted into the bolt insertion hole of the one flange and screwed into the female thread part, and the other end side extends to the flange side jig ( For example, a lifting prevention member 60 described later is provided.

Only the depth of the bolt insertion hole, that is, the thickness of the flange can be secured as the pin insertion depth of the flange side jig. Therefore, if the flange-side jig is moved by the moving device, the pin may be detached from the flange.
Therefore, according to the present invention, the drop-off prevention member is attached to the flange to be fixed, and the other end side of the drop-off prevention member is extended to the flange-side jig attached to the flange that is not fixed. Therefore, this drop-off prevention member can suppress flapping of the flange-side jig and prevent the pins of the flange-side jig from being detached from the bolt insertion holes.

  According to the present invention, even if the lower housing and the upper housing are displaced in the horizontal direction, the seismic isolation device can be easily attached between the lower housing and the upper housing.

It is sectional drawing of the existing seismic isolation apparatus used as the application object of the attachment method of the seismic isolation apparatus which concerns on one Embodiment of this invention. It is a flowchart of the procedure which replaces | exchanges the seismic isolation apparatus which concerns on the said embodiment. It is explanatory drawing (the 1) of the procedure which replaces | exchanges the seismic isolation apparatus which concerns on the said embodiment. It is a side view of the moving apparatus and drop-off prevention member used for replacement | exchange of the seismic isolation apparatus which concerns on the said embodiment. It is a top view of the moving apparatus which concerns on the said embodiment. It is AA sectional drawing of FIG. It is a modification of the moving apparatus which concerns on the said embodiment. It is explanatory drawing (the 2) of the procedure which replaces | exchanges the seismic isolation apparatus which concerns on the said embodiment. It is explanatory drawing (the 3) of the procedure which replaces | exchanges the seismic isolation apparatus which concerns on the said embodiment. It is explanatory drawing (the 4) of the procedure which replaces | exchanges the seismic isolation apparatus which concerns on the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of an existing seismic isolation device 10 that is an application target of a method for mounting a seismic isolation device according to an embodiment of the present invention.

  A planar rectangular existing pillar 2 is provided in the underground building of the existing building 1, and an existing seismic isolation device 10 is installed at an intermediate height of the existing pillar 2. The lower part of the seismic isolation device 10 is the lower housing 3, and the upper part of the seismic isolation device 10 is the upper housing 4. The seismic isolation device 10 is supported by the lower housing 3 to make the upper housing 4 seismic isolation.

A lower base plate 20 is driven into the upper surface of the lower housing 3. The lower base plate 20 has a plurality of female screw portions 21 arranged in an annular shape.
An upper base plate 30 is driven into the lower surface of the upper housing 4. The upper base plate 30 has a plurality of female screw portions 31 arranged in an annular shape.

The seismic isolation device 10 includes a laminated rubber 11, a lower flange 12 provided below the laminated rubber 11, and an upper flange 13 provided on the laminated rubber 11.
The laminated rubber 11 is obtained by alternately laminating rubber and steel plates and is elastically deformable.

The lower flange 12 is formed with a bolt insertion hole 121 arranged in an annular shape. The lower flange 12 is fixed to the lower base plate 20 by inserting the fixing bolt 22 into the bolt insertion hole 121 and screwing into the female screw portion 21 of the lower base plate 20.
The upper flange 13 is formed with a bolt insertion hole 131 arranged in an annular shape. The upper flange 13 is fixed to the upper base plate 30 by inserting the fixing bolt 32 into the bolt insertion hole 131 and screwing it into the female screw portion 31 of the upper base plate 30.

  Here, the lower casing 3 and the upper casing 4 have different contraction of the casing, or residual deformation occurs after the earthquake, so that the lower casing 3 and the upper casing 4 are displaced in the horizontal direction.

Hereinafter, the procedure for exchanging the seismic isolation device 10 will be described with reference to the flowchart of FIG.
In step S1, a temporary support column (not shown) is installed around the existing column 2 where the seismic isolation device 10 is installed. This provisional support post is installed between the lower housing 3 and the upper housing 4. The upper casing 4 is jacked up with the provisional support column, and the vertical load acting on the seismic isolation device 10 is released.

In step S <b> 2, as shown in FIG. 3, the existing seismic isolation device 10 is removed, and the new seismic isolation device 10 is disposed between the lower housing 3 and the upper housing 4. Accordingly, the lower flange 12 of the new seismic isolation device 10 is disposed to face the lower base plate 20 of the lower housing 3, and the upper flange 13 is disposed to face the upper base plate 30 of the upper housing 4.
At this time, the position of the bolt insertion hole 131 of the upper flange 13 of the new seismic isolation device 10 is matched with the female thread portion 31 of the upper base plate 30. Therefore, in this state, the lower flange 12 is displaced in the horizontal direction with respect to the lower housing 3.

Next, a pair of moving devices 50 and a lifting prevention member 60 as a drop prevention member are attached to the existing pillar 2.
FIG. 4 is a side view of the moving device 50 and the lifting prevention member 60. FIG. 5 is a plan view of the moving device 50. 6 is a cross-sectional view taken along the line AA in FIG.

The pair of moving devices 50 is provided on each of the side surfaces adjacent to each other of the existing pillar 2.
Each moving device 50 includes a housing-side jig 51 attached to the lower housing 3 and the upper housing 4, a flange-side jig 52 attached to the lower flange 12, and a flange-side jig 52 provided on the housing-side jig 51. And a center hole jack 53 for moving.

The housing-side jig 51 is an H-shaped steel, is in contact with the side surfaces of the lower housing 3 and the upper housing 4 and is disposed across the lower housing 3 and the upper housing 4.
The flange side jig 52 is inserted into the pair of substantially parallel grooved steels 54 arranged along the surface of the lower flange 12 and the bolt insertion holes 121 of the lower flange 12 provided on the grooved steel 54. A pin 55 made of round steel, a sliding plate 56 attached to the upper surface of the groove steel 54 and having a smooth surface, and a connecting member 57 made of angle steel for connecting the pair of groove steels 54 to each other are provided.

  The center hole jack 53 is provided so as to be substantially perpendicular to the side surface of the existing pillar 2 and includes a PC steel bar 58 connected to the approximate center of the connecting member 57 of the flange side jig 52. 58 is pulled.

The lifting prevention member 60 has a male threaded portion at one end (upper end), and this male threaded portion is inserted into the bolt insertion hole 131 of the upper flange 13 and screwed into the female threaded portion 31 of the upper housing 4. ing. Further, the other end side (lower end side) of the lifting prevention member 60 extends to the inside of the channel steel 54 of the flange side jig 52 and is in contact with the sliding plate 56.
The lifting prevention member 60 is attached by appropriately selecting the bolt insertion hole 131 of the upper flange 13 that is located immediately above the channel steel 54 of the housing side jig 51.

  According to the moving device 50 described above, by driving the center hole jack 53, reaction force is exerted on the lower housing 3 and the upper housing 4 via the housing-side jig 51, and the flange-side jig 52, that is, the lower flange 12. Pull. Thereby, the flange side jig 52, that is, the lower flange 12 moves relative to the lower housing 3 and the upper housing 4.

  At this time, the lifting prevention member 60 suppresses the lifting of the flange side jig 52, and the lifting prevention member 60 slides on the smooth sliding plate 56, so that the lifting prevention member 60 and the flange side jig 52 Reduce frictional resistance.

  In addition, as shown in FIG. 7, the center hole jack 53 is inclined with respect to the side surface of the existing pillar 2 by sandwiching the taper plate 59 between the housing side jig 51 and the lower housing 3 and the upper housing 4. May be arranged.

In step S3, the positional deviation with respect to the upper flange 13 of the lower flange 12 is measured, and the arrangement of the moving device 50 and the lifting prevention member 60 is determined based on this positional deviation.
That is, since the center hole jack 53 pulls the lower flange 12, the pulling direction of the lower flange is determined, and the mounting position of the flange side jig 52 on the lower flange 12 is determined based on the pulling direction of the lower flange. The attachment position and attachment direction of the center hole jack 53 and the attachment position of the lifting prevention member 60 on the upper flange 13 are determined.

  In step S4, as shown in FIG. 8, the fixing bolt 32 is attached to the bolt insertion hole 131 to which the lifting prevention member 60 of the upper flange 13 is not attached, and the upper flange 13 is opposed to the upper base plate 30 facing the upper flange 13, Fix to the upper housing 4.

In step S <b> 5, as shown in FIG. 8, the lifting prevention member 60 is attached to the predetermined bolt insertion hole 131 of the upper flange 13, and the flange side jig 52 is attached to the lower flange 12.
At this time, the position of the sliding plate 56 of the flange side jig 52 is adjusted in accordance with the direction in which the positional deviation of the lower flange 12 is corrected.

In step S6, as shown in FIG. 9, the center hole jack 53 and the housing side jig 51 are attached.
In step S7, as shown in FIG. 10, each center hole jack 53 is driven, the lower flange 12 is horizontally moved with respect to the lower housing 3 and the upper housing 4, and the position is adjusted. The position of the bolt insertion hole 121 of the flange 12 is aligned with the female screw portion 21 of the lower base plate 20.

In step S8, the fixing bolt 22 is attached to the bolt insertion hole 121 to which the flange side jig 52 of the lower flange 12 is not attached, and the lower flange 12 is connected to the lower base plate 20 that is opposed to the lower flange 12, that is, the lower casing 3. Secure to.
In step S9, the lifting prevention member 60, the moving device 50, and the temporary support column are removed.
In step S10, the fixing bolt 32 is attached to the bolt insertion hole 131 to which the lifting prevention member 60 of the upper flange 13 is attached, and the fixing bolt 22 is attached to the bolt insertion hole 121 to which the flange side jig 52 of the lower flange 12 is attached. Install.

According to this embodiment, there are the following effects.
(1) The upper flange 13 is fixed to the upper housing 4, and in this state, the lower flange 12 that is not fixed is horizontally moved by the moving device 50 to adjust the position. Therefore, since the lower flange 12 which is not fixed can be easily adjusted to the position of the lower casing 3, even if the lower casing 3 and the upper casing 4 are displaced in the horizontal direction, they are seismically isolated. The device 10 can be easily attached between the lower housing 3 and the upper housing 4.

  (2) Since the pin 55 is provided on the flange side jig 52 and this pin 55 is inserted into the bolt insertion hole 121 of the lower flange 12 and locked, the center hole jack 53 is not fixed by driving. The lower flange 12 can be easily moved horizontally.

  (3) The lifting prevention member 60 is attached to the upper flange 13 to be fixed, and the lower end side of the lifting prevention member 60 is extended to the flange side jig 52 attached to the lower flange 12 that is not fixed. Therefore, the floating prevention member 60 can prevent the flange-side jig 52 from flapping, and the pin 55 of the flange-side jig 52 can be prevented from coming off from the bolt insertion hole 121.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

DESCRIPTION OF SYMBOLS 1 ... Existing building 2 ... Existing pillar 3 ... Lower housing 4 ... Upper housing 10 ... Seismic isolation device 11 ... Laminated rubber 12 ... Lower flange 13 ... Upper flange 20 ... Lower base plate 21 ... Female thread part 22 ... Fixing bolt 30 ... Upper base plate DESCRIPTION OF SYMBOLS 31 ... Female thread part 32 ... Fixing bolt 50 ... Moving device 51 ... Housing side jig | tool 52 ... Flange side jig | tool 53 ... Center hole jack 54 ... Groove-shaped steel 55 ... Pin 56 ... Sliding plate 57 ... Connecting member 58 ... PC steel rod 59 ... Tapered plate 60 ... Lifting prevention member (falling prevention member)
121, 131 ... Bolt insertion hole

Claims (1)

A seismic isolation device mounting method for attaching a seismic isolation device between a lower housing and an upper housing,
The seismic isolation device includes a laminated rubber, a lower flange provided under the laminated rubber and formed with a bolt insertion hole, an upper flange provided on the laminated rubber and formed with a bolt insertion hole , With
Placing the seismic isolation device between the lower housing and the upper housing, disposing the lower flange opposite the lower housing, and disposing the upper flange opposite the upper housing;
Fixing one of the lower flange and the upper flange to a housing facing the one flange; and
A step of attaching a moving device and a drop-off preventing member and adjusting the position by horizontally moving the other of the lower flange and the upper flange by using the moving device to counteract the lower housing and the upper housing. When,
Fixing the other flange to the housing facing the other flange , and
The moving device includes a housing-side jig attached to the lower housing and the upper housing, a flange-side jig attached to the other flange, and the flange-side jig in a horizontal direction with respect to the housing-side jig. The flange side jig is provided with a pin inserted into the bolt insertion hole of the other flange,
An internal thread portion is formed on the housing facing the one flange,
The seismic isolation device mounting method characterized in that one end side of the drop-off prevention member is inserted into the bolt insertion hole of the one flange and screwed into the female screw portion, and the other end side extends to the flange-side jig .

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