JP2016089529A - Level adjustment plate, level adjuster and seismic isolation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a level adjustment plate capable of improving workability in an insertion/pull-out work, and to provide a level adjuster and a seismic isolation structure.SOLUTION: A level adjustment plate 30 is a plate for adjusting the height of a girder 3 by being inserted between the girder 3 and a base 2 to increase the height of the girder 3 relative to the base 2 and by being pulled out from between the girder 3 and the base 2 to reduce the height. The level adjustment plate 30 includes a gripper protruding outward in a state being disposed between the girder 3 and the base 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a level adjustment plate, a level adjustment tool, and a seismic isolation structure that adjust the height of a building by inserting and removing the building.

  Japanese Patent Application Laid-Open No. 2008-261144 describes a height adjusting material that adjusts the height of a building by sandwiching it horizontally between a seismic isolation device and a column or between a seismic isolation device and a foundation. This height adjusting material has a plate shape, and the height of the building is adjusted by adjusting the number of the height adjusting materials to be sandwiched. The height adjusting material is constituted by a plurality of divided flat plates.

  The above publication describes a method for adjusting the height of a base-isolated building. In this method, the floor beam near the seismic isolation device is lifted with a jack at each location where the seismic isolation device subject to height adjustment is present. The height of the floor beam is adjusted by inserting a fixing member between the floor beam and the foundation, and inserting and removing the height adjusting material between the floor beam and the foundation while the floor beam is lifted with respect to the foundation. The In addition, the above-mentioned publication describes an existing expansion preparation base isolation building and an extension base isolation building. When the extension base isolation building sinks with a load against the extension preparation base isolation building, the extension The height of the additional seismic isolation building is increased by increasing the number of height adjustment materials provided in the lower part of the earthquake building.

JP 2008-261144 A

  The level adjusting plate such as the height adjusting member described above is inserted into and removed from the building in a state where the floor beam is lifted with a jack. Here, since the planar shape of the level adjustment plate described above is the same as that of the seismic isolation device, there is a problem that it is difficult to insert and remove the level adjustment plate. Furthermore, since the level adjustment plate described above is composed of a plurality of flat plates, there is a trouble that many flat plates must be prepared in advance. As described above, since the operation of inserting and removing the level adjustment plate is troublesome, it is required to improve the workability in the operation of inserting and removing the level adjustment plate.

  It is an object of the present invention to provide a level adjustment plate, a level adjustment tool, and a seismic isolation structure that can improve workability in an insertion / removal operation.

  The level adjustment plate according to the present invention increases the height of the upper structure relative to the lower structure by being inserted between the upper structure and the lower structure, and is pulled out from between the upper structure and the lower structure. The level adjustment plate that adjusts the height of the upper structure by lowering the height of the upper structure includes a gripping portion that protrudes outward while being sandwiched between the upper structure and the lower structure.

  In the level adjustment plate according to the present invention, the gripping portion protrudes outward while being sandwiched between the upper structure and the lower structure. Therefore, the level adjustment plate can be easily pulled out by pulling the gripping portion while the upper structure is lifted by a jack or the like. Further, when inserting the level adjustment plate, it is necessary to adjust the position of the level adjustment plate in plan view with high accuracy. Here, the level adjustment plate is inserted between the lower structure and the upper structure in a state where the upper structure is lifted with a jack or the like, and the position of the level adjustment plate in a plan view can be easily obtained by holding the holding portion in this state. Can be fine-tuned. Therefore, the work of inserting the level adjustment plate between the upper structure and the lower structure can be easily performed. Therefore, workability in the work of inserting and removing can be improved.

  Further, the level adjustment plate according to the present invention may include a plurality of gripping portions. If there is only one gripping part, and if a machine or the like is placed outside the gripping part while being sandwiched between the upper structure and the lower structure, the machine or the like becomes an obstacle. The level adjustment plate cannot be pulled out by the grip. Here, when a plurality of gripping portions are provided as described above, even if the gripping portion cannot be pulled in one direction, the level can be easily adjusted by pulling the gripping portion in the other direction. The adjustment plate can be pulled out. When a plurality of gripping portions are provided, the plurality of workers each have a gripping portion when the level adjustment plate is inserted, so that the position adjustment of the level adjustment plate can be easily performed by the plurality of workers. Therefore, the work of inserting and removing can be performed more easily.

  A level adjuster according to the present invention is a level adjuster provided with a plurality of the level adjust plates described above, wherein at least a first level adjust plate and a second level adjust plate are stacked one above the other. In a state of being sandwiched between the structures, the position of the grip portion of the first level adjustment plate in plan view is different from the position of the grip portion of the second level adjustment plate in plan view.

  Thus, by using the level adjuster in which the positions of the gripping portions in plan view are staggered, the gripping portions can be more easily held. Further, when the level adjustment plate is pulled out, a level adjustment plate may be floated by inserting a wedge or the like under the level adjustment plate. When such a work is performed, if the positions of the grip portions in plan view are different from each other, the wedge can be easily sandwiched under the grip portions. Accordingly, the work of pulling out the level adjustment plate can be easily performed, so that the workability can be further improved.

  The seismic isolation structure according to the present invention includes a seismic isolation device that connects the upper structure and the lower structure, between the seismic isolation device and the upper structure, and / or between the seismic isolation device and the lower structure. And the above-described level adjustment plate sandwiched therebetween. Therefore, the level adjustment plate can be easily inserted and removed during work such as the introduction of the seismic isolation device. Therefore, operations such as introduction of the seismic isolation device can be easily performed.

  According to the present invention, it is possible to improve workability in inserting and removing operations.

It is a perspective view which shows one Embodiment of the seismic isolation structure which concerns on this invention. It is the perspective view which looked at the piled level adjustment plate from the top. It is a top view of a level adjustment plate. It is a perspective view which shows the structure of the holding part vicinity of the level adjustment plate which was piled up. It is sectional drawing which shows the state which pulls out the level adjustment plate from the seismic isolation structure of FIG. It is a perspective view which shows the level adjustment tool arrange | positioned so that the position of the holding part in planar view may mutually differ. It is a top view which shows the level adjustment plate which concerns on a modification.

  Hereinafter, embodiments of a level adjustment plate, a level adjustment tool, and a seismic isolation structure according to the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 1, the seismic isolation structure 1 according to the present embodiment is installed in a foundation pit of a new building, and the base isolation is performed by the seismic isolation structure 1. The seismic isolation structure 1 is interposed between a concrete foundation (lower structure) 2 constructed on the ground and a concrete large beam (upper structure) 3 located above the foundation 2. A concrete upper foundation 5 is provided between the girder 3 and the base isolation structure 1, and a concrete lower foundation 6 is provided between the foundation 2 and the base isolation structure 1. The upper foundation 5 protrudes downward from the lower surface of the large beam 3, and the lower foundation 6 protrudes upward from the upper surface of the foundation 2.

  The base isolation structure 1 includes a base isolation device 10. The seismic isolation device 10 includes a cylindrical laminated rubber 11, and an upper flange 12 and a lower flange 13 that sandwich the laminated rubber 11 from above and below the laminated rubber 11. The laminated rubber 11 has a structure in which rubber and steel plates are alternately laminated by, for example, vulcanization adhesion. The upper flange 12 is provided on the upper side of the laminated rubber 11, and the lower flange 13 is provided on the lower side of the laminated rubber 11.

  For example, the laminated rubber 11, the upper flange 12, and the lower flange 13 are circular in a plan view, and are provided concentrically with each other. The diameters of the upper flange 12 and the lower flange 13 are larger than the diameter of the laminated rubber 11. The upper flange 12 and the lower flange 13 are provided with a plurality of through holes penetrating vertically, and anchor bolts 14 are inserted into the through holes. These through holes and anchor bolts 14 are arranged at equal intervals along the circumferential direction of the upper flange 12 and the lower flange 13. The anchor bolt 14 inserted through the through hole is screwed into a high nut embedded in the upper foundation 5 and the lower foundation 6, and the upper flange 12 is fixed to the upper foundation 5 by this screwing, and the lower flange 13. Is fixed to the lower foundation 6.

  The seismic isolation structure 1 includes a level adjuster 20 that adjusts the height of the girder 3 relative to the foundation 2. The level adjuster 20 is inserted between the upper flange 12 and the upper base 5. The level adjuster 20 is detachable from the foundation 2 and the large beam 3. As shown in FIGS. 1 and 2, the level adjuster 20 is configured by stacking a plurality of level adjustment plates 30 vertically. In the level adjuster 20, the height of the girder 3 relative to the foundation 2 can be adjusted by adjusting the number of level adjusting plates 30 to be stacked.

  Specifically, the height of the large beam 3 can be increased by increasing the number of level adjustment plates 30 to be stacked, and the height of the large beam 3 can be decreased by decreasing the number of level adjustment plates 30 to be stacked. It is possible. In this way, the height of the large beam 3 is adjusted by inserting and removing the level adjusting plate 30 between the upper flange 12 and the upper base 5.

  The level adjustment plate 30 has a shape that matches the shape of the seismic isolation device 10 (laminated rubber 11, upper flange 12, and lower flange 13) in plan view, and specifically has a disk shape. The diameter of the level adjustment plate 30 is larger than the diameters of the upper flange 12 and the lower flange 13. The level adjustment plate 30 is disposed so as to be concentric with the laminated rubber 11, the upper flange 12 and the lower flange 13.

  The level adjustment plate 30 includes a circular flat plate surface 31 on the front and back sides, and further includes an end surface 32 that is orthogonal to the flat plate surface 31 and extends in the circumferential direction of the level adjustment plate 30. When the level adjustment plate 30 is overlaid, the flat plate surface 31 is in close contact with the upper surface of the upper flange 12, the lower surface of the upper foundation 5, or the flat plate surface 31 of another level adjustment plate 30. Further, the end face 32 is exposed to the outside in the radial direction of the level adjustment plate 30 when the level adjustment plate 30 is overlapped.

  The end face 32 of the level adjustment plate 30 is rust-proofed. Thereby, the end surface 32 exposed to the outside can be protected from air and water, and the end surface 32 can be made difficult to rust. On the other hand, the flat surface 31 of the level adjustment plate 30 is not subjected to rust prevention coating. This is because, in the state where the level adjustment plate 30 is stacked, the flat plate surface 31 is in close contact with the top and bottom and hardly touches air or water as described above.

  As shown in FIGS. 2 and 3, the level adjustment plate 30 includes a through hole 33 through which the anchor bolt 14 described above is inserted. A plurality of through holes 33 are provided, and are arranged at equal intervals in the circumferential direction of the level adjustment plate 30 in the vicinity of the end surface 32 of the level adjustment plate 30. In the example shown in FIG. 3, twelve through-holes 33 are provided and are arranged in an annular shape so that the phase angle is 30 °.

  The level adjustment plate 30 includes a grip portion 35. The grip part 35 is a part that is gripped by an operator or hooked by a string-like member or the like in the operation of inserting and removing the level adjustment plate 30. The gripping portion 35 is provided at two locations with respect to one level adjustment plate 30. The two gripping portions 35 are disposed at positions that are symmetric with respect to the center O of the level adjustment plate 30.

  The grip 35 includes a protrusion 35 a that protrudes from the end surface 32 to the outside of the level adjustment plate 30, and a through hole 35 b that vertically penetrates the protrusion 35 a. Through the through hole 35b, it is possible to make it easier to grip the grip portion 35 or to easily hook a string-like member or the like on the grip portion 35.

  The shape of the protrusion 35a seen from the out-of-plane direction of the flat plate surface 31 of the level adjustment plate 30 is a rectangular shape with rounded corners, and the shape of the through-hole 35b seen from the out-of-plane direction is the same. It has a rectangular shape. The shape of the through hole 35b when viewed from the out-of-plane direction is a shape that follows the outer periphery of the protruding portion 35a. In addition, since the grip portion 35 is also coated with rust prevention, the grip portion 35 exposed to the outside can be protected from air and water, and the grip portion 35 can be made difficult to rust.

  Next, an operation method for attaching and detaching the level adjustment tool 20 by inserting and removing the level adjustment plate 30 will be described. As shown in FIG. 1, the operation of inserting and removing the level adjustment plate 30 is performed using a raising material 41, a jack 42, and a filler plate 43. First, an operation method for inserting the level adjustment plate 30 and installing the level adjustment tool 20 will be described.

  First, four raising members 41 are arranged on the foundation 2 so as to surround the seismic isolation device 10 from four directions, and two jacks 42 are arranged on the upper surface of each raising member 41. A filler plate 43 is disposed at the upper end. In this way, the raising material 41, the jack 42 and the filler plate 43 are sandwiched between the foundation 2 and the upper foundation 5.

  Thus, in the state which sandwiched the raising material 41, the jack 42, and the filler plate 43, the upper foundation 5 is pushed up by extending each jack 42, and the upper foundation 5 is made into the state which floated. Thus, the upper foundation 5 is floated, and a gap is formed between the upper surface of the upper flange 12 and the lower surface of the upper foundation 5. Then, the level adjustment plate 30 is inserted into the gap, and the position of the level adjustment plate 30 with respect to the upper flange 12 and the upper foundation 5 is adjusted.

  At this time, as shown in FIG. 4, the position of the grip portion 35 of one level adjustment plate 30 in plan view and the position of the grip portion 35 of another level adjustment plate 30 in plan view are different from each other. The position of the level adjustment plate 30 is adjusted. After the position adjustment of each level adjustment plate 30 is completed, the anchor bolts 14 are inserted from below into the respective through holes of the upper flange 12 and the respective through holes 33 of the level adjustment plate 30 to fix the respective level adjustment plates 30. Let Thus, the installation of the level adjuster 20 is completed.

  Next, a method of extracting the level adjustment plate 30 will be described. First, all the anchor bolts 14 are removed from the upper flange 12. And the raising material 41, the jack 42, and the filler plate 43 are arrange | positioned similarly to the above, and the upper foundation 5 is floated by the expansion | extension of the jack 42. FIG. In this way, a gap is formed below the upper base 5, and the uppermost level adjustment plate 30 is pulled out from this gap. When the level adjustment plate 30 is pulled out, a wedge may be sandwiched below the level adjustment plate 30 so that the level adjustment plate 30 is floated.

  As described above, in the level adjustment plate 30 according to the present embodiment, the grip portion 35 protrudes outward while being sandwiched between the large beam 3 and the foundation 2. Therefore, the level adjustment plate 30 can be easily pulled out by pulling the grip portion 35 in a state where the large beam 3 is lifted by the jack 42.

  Further, when the level adjustment plate 30 is inserted, it is necessary to adjust the position of the level adjustment plate 30 in plan view with high accuracy. Here, the level adjustment plate 30 is inserted between the foundation 2 and the large beam 3 in a state where the large beam 3 is lifted by the jack 42, and the position of the level adjustment plate 30 in a plan view can be easily obtained by holding the grip portion 35 in this state. Can be fine-tuned. Therefore, the work of inserting the level adjustment plate 30 between the large beam 3 and the foundation 2 can be easily performed. Therefore, the workability of the work in insertion / extraction can be improved.

  Further, the level adjustment plate 30 includes a plurality of (two in this embodiment) gripping portions 35. Here, in the case where there is only one gripping part 35, when a machine or the like is disposed outside the gripping part 35 while being sandwiched between the large beam 3 and the foundation 2, the machine or the like is obstructive. Thus, the level adjustment plate 30 cannot be pulled out by the grip portion 35. On the other hand, when a plurality of gripping portions 35 are provided as in this embodiment, even if the gripping portion 35 cannot be pulled in one direction, the gripping portion 35 is moved in the other direction. The level adjusting plate 30 can be easily pulled out by pulling.

  For example, as shown in FIG. 5, the level adjusting plate 30 cannot be pulled out in the direction in which the raising member 41 is provided, and the level adjusting plate 30 can be drawn out from the portion between the two raising members 41. . Therefore, it is preferable that the gripping portion 35 faces between the two raising members 41 in plan view.

  However, when a machine or the like is disposed at a position between the two raising members 41 in a plan view (for example, a position indicated by the lower left arrow in FIG. 5), the level adjustment plate 30 is obstructed by the machine or the like. Do not pull through. In preparation for such a case, in the present embodiment, the level adjustment plate 30 is provided with a plurality of holding portions 35 in a preliminary manner. That is, even if the level adjustment plate 30 cannot be pulled out in one direction, the level adjustment plate 30 can be pulled out in the other direction (for example, the direction indicated by the upper right arrow in FIG. 5).

  In addition, since the level adjustment plate 30 includes a plurality of gripping portions 35, when the level adjustment plate 30 is inserted, each of the plurality of workers has the gripping portions 35, so that a plurality of workers can adjust the position of the level adjustment plate 30. Can be done easily. Therefore, the work of inserting and removing can be performed more easily.

  In particular, in the present embodiment, the plurality of gripping portions 35 are arranged at positions that are symmetric with respect to the center O of the level adjustment plate 30. That is, the two gripping portions 35 are arranged on a straight line passing through the center O. Therefore, since the level adjustment plate 30 is pulled out in a plurality of directions opposite to each other in plan view, workability is further improved.

  Further, the level adjuster 20 according to the present embodiment includes a plurality of level adjustment plates 30 and has a structure in which at least the first level adjustment plate 30 and the second level adjustment plate 30 are vertically stacked. The position of the grip portion 35 of the first level adjustment plate 30 in plan view is different from the position of the grip portion 35 of the second level adjustment plate 30 in plan view. Specifically, as shown in FIG. 6, for example, the level adjustment plate 30 is arranged so that the positions of the grip portions 35 of the level adjustment plates 30 adjacent to each other in the vertical direction do not overlap. Thus, by using the level adjuster 20 in which the positions of the gripping portions 35 in the plan view are staggered, the gripping portions 35 can be more easily held.

  When the level adjustment plate 30 is pulled out, the level adjustment plate 30 is floated by sandwiching a wedge or the like under the level adjustment plate 30 as described above. When performing such an operation, if the positions of the gripping portions 35 in plan view are different from each other, the wedge can be easily sandwiched under the gripping portion 35. Accordingly, the work of pulling out the level adjustment plate 30 can be easily performed, so that the workability can be further improved.

  The seismic isolation structure 1 according to the present embodiment includes a seismic isolation device 10 that connects the large beam 3 and the foundation 2, and a level adjustment plate 30 that is sandwiched between the seismic isolation device 10 and the upper foundation 5. ing. Therefore, the level adjustment plate 30 can be easily inserted and removed during work such as introduction of the seismic isolation device 10. Therefore, operations such as introduction of the seismic isolation device can be easily performed.

  The present invention is not limited to the above-described embodiments, and various modifications as described below can be made without departing from the spirit and scope of the present invention.

  For example, in the above-described embodiment, twelve through holes 33 of the level adjustment plate 30 are provided, and are arranged annularly so that the phase angle is 30 °. However, the arrangement of the through holes of the level adjustment plate is not limited to the above embodiment. For example, as shown in the modification of FIG. 7, the number of the through holes 53 of the level adjustment plate 50 may be 24, and the through holes 53 may be annularly arranged so that the phase angle is 15 °. That is, the number of through holes of the level adjustment plate, the arrangement position, and the shape can be appropriately changed.

  Further, in the above embodiment, two gripping portions 35 are provided, and the two gripping portions 35 are arranged at positions that are symmetric with respect to the center O of the level adjustment plate 30. However, the number and arrangement of the gripping portions are not limited to the above embodiment and can be changed as appropriate. For example, a plurality of gripping portions may be arranged at positions that are not symmetric, or only one gripping portion may be placed. Further, the shape of the grip portion 35 can be changed as appropriate.

  Moreover, although the said embodiment demonstrated the example in which the level adjustment plate 30 was inserted between the upper flange 12 and the upper foundation 5, the position where the level adjustment plate 30 is inserted is not limited above. For example, the level adjustment plate 30 may be inserted between the lower flange 13 and the lower foundation 6, both between the upper flange 12 and the upper foundation 5, and between the lower flange 13 and the lower foundation 6. You may be plugged in.

  Moreover, although the said embodiment demonstrated the example in which the shape of the seismic isolation apparatus 10 and the level adjustment plate 30 in planar view was circular shape, the shape of the seismic isolation apparatus and level adjustment plate in planar view is also limited to the said embodiment. It can be changed as appropriate. For example, the shape of the seismic isolation device in plan view may be a quadrangle, and in this case, the shape of the level adjustment plate is also a quadrangle.

  Moreover, although the said embodiment demonstrated the seismic isolation structure 1 installed in the foundation pit of a new building, the seismic isolation structure which concerns on this invention is applicable besides a newly built building. For example, the seismic isolation structure according to the present invention may be introduced when an existing building is subjected to seismic isolation (seismic isolation retrofit). Furthermore, the level adjustment plate and the level adjustment tool according to the present invention can be applied to any structure and can be applied to structures other than the seismic isolation structure.

DESCRIPTION OF SYMBOLS 1 ... Seismic isolation structure, 2 ... Foundation (lower structure), 3 ... Large beam, 5 ... Upper foundation, 6 ... Lower foundation, 10 ... Seismic isolation device, 11 ... Laminated rubber, 12 ... Upper flange, 13 ... Lower flange, DESCRIPTION OF SYMBOLS 14 ... Anchor bolt, 20 ... Level adjusting tool, 30, 50 ... Level adjusting plate, 31 ... Flat plate surface, 32 ... End surface, 33, 53 ... Through-hole, 35 ... Holding part, 35a ... Protruding part, 35b ... Through-hole, 41 ... Raised material, 42 ... Jack, 43 ... Filler plate.

Claims (4)

The height of the upper structure relative to the lower structure is increased by inserting between the upper structure and the lower structure, and the height is increased by pulling out between the upper structure and the lower structure. In the level adjustment plate that lowers and adjusts the height of the superstructure,
A level adjustment plate comprising a gripping portion protruding outward in a state of being sandwiched between the upper structure and the lower structure.   The level adjustment plate according to claim 1, comprising a plurality of the grip portions. A level adjuster comprising a plurality of level adjusting plates according to claim 1 or 2, wherein at least the first level adjusting plate and the second level adjusting plate are vertically stacked,
In a state sandwiched between the upper structure and the lower structure, the position of the grip portion of the first level adjustment plate in plan view and the grip of the second level adjustment plate in plan view Level adjuster with different position. A seismic isolation device that connects the upper structure and the lower structure;
The level adjusting plate according to claim 1 or 2, sandwiched between the seismic isolation device and the upper structure and / or between the seismic isolation device and the lower structure,
Seismic isolation structure with

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