JP2005220947A - Structure of base isolation part using base isolation device in building and method for replacing base isolation device of base isolation part - Google Patents

Structure of base isolation part using base isolation device in building and method for replacing base isolation device of base isolation part Download PDF

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JP2005220947A
JP2005220947A JP2004027237A JP2004027237A JP2005220947A JP 2005220947 A JP2005220947 A JP 2005220947A JP 2004027237 A JP2004027237 A JP 2004027237A JP 2004027237 A JP2004027237 A JP 2004027237A JP 2005220947 A JP2005220947 A JP 2005220947A
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seismic isolation
isolation device
base isolation
plate
building
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Tomohiro Takabayashi
智広 高林
Hideo Uchimoto
英雄 内本
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Shimizu Construction Co Ltd
Shimizu Corp
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Shimizu Construction Co Ltd
Shimizu Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To enable the replacement of a base isolation device without using a cutting device and cooling facilities by forming a space for facilitating replacement work of the base isolation device without additional jack-up after providing slight gap between the base isolation device and a structure part by performing jack-up between a lower part structure part and an upper part structure part of a base isolation part. <P>SOLUTION: In the base isolation part 1 having arranged a base isolation device 4 made of laminated rubber between the lower part structure part 2 and the upper part structure part 3, an insertion plate 11 is put between at lease one of a gap between the lower part structure part 2 and the base isolation device 4, and a gap between the base isolation device 4 and the lower part structure part 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、建物、土木構造物、大規模モニュメントなどの構築物における免震装置を用いた免震部の構造及びこの構造の免震部における免震装置の交換方法に関するものである。   The present invention relates to a structure of a base isolation unit using a base isolation device in a structure such as a building, a civil engineering structure, and a large-scale monument, and a method of replacing the base isolation device in the base isolation unit of this structure.

従来から鉄骨造、鉄筋コンクリート造、鉄骨鉄筋コンクリート造による建物、土木構造物、大規模モニュメントなどの各種の構築物の耐震性を向上させるために、積層ゴムからなる免震装置をその構築物の地下部やその中間部に設置して免震部を形成することが行われていて、この免震部の免震装置はその耐用年数に達したり、或いは設置条件の変化により著しく劣化したり、さらには地震や火災などで損傷が加わった場合にこの免震装置の交換が行われる。   Conventionally, in order to improve the earthquake resistance of various structures such as steel structures, reinforced concrete structures, steel reinforced concrete structures, civil engineering structures, large-scale monuments, etc. The seismic isolation device is installed in the middle part, and the seismic isolation device of this seismic isolation unit reaches its useful life, or deteriorates significantly due to changes in installation conditions, This seismic isolation device is replaced when damaged by fire.

このような免震装置の交換に際しては、免震部における下部構造部と上部構造部との間にジャッキを配し、ジャッキアップして免震装置の交換を行ない易くするための間隔を免震装置と上部構造部との間に開けてからその免震装置の交換を行なうことが考えられるが、交換作業を行ない易くする空間をジャッキアップのみにより得ようとした場合に構築物の局部的な変形が大きくなり、その構築物に損傷を与えることがある。
そのため、ビルなどの建物を新築するする場合、上記免震部を形成する時点で、その免震部の上部構造部や下部構造部が補強された構造としたり、或いは免震装置交換時に上部構造部や下部構造部にプレストレスを導入できる構造としておくことが提案されている（例えば、特許文献１参照）。 When exchanging such a seismic isolation device, place a jack between the lower structure and the upper structure in the seismic isolation unit, and increase the jack to make it easier to replace the seismic isolation device. It is conceivable to replace the seismic isolation device after opening it between the device and the superstructure, but if it is attempted to obtain a space that facilitates the replacement work only by jacking up, local deformation of the structure May grow and damage the structure.
Therefore, when building a new building, such as a building, when the above seismic isolation part is formed, the upper structure or lower structure of the seismic isolation part is reinforced, or the upper structure is replaced when the seismic isolation device is replaced. It has been proposed to have a structure capable of introducing prestress into the part and the lower structure part (see, for example, Patent Document 1).

また、既設の建物における免震部での下部構造部と上部構造部との間にジャッキを配してそのジャッキによって下部構造部と上部構造部との間の寸法を変えないように支持することを条件として、つぎのような交換方法も提案されていた。
その一つとして、ジャッキで支持された下部構造部と上部構造部との間にある免震装置の積層ゴムを切断してその免震装置を取り除き、そして、その取り外す前の免震装置より高さ寸法の小さい新たな免震装置を配置し、建物荷重を新たな免震装置に支持させてからジャッキを取り外すようにするものが提案されている（例えば特許文献２参照）。
また、ジャッキで支持された下部構造部と上部構造部の間にある免震装置を冷却装置で冷却して積層ゴムを収縮させて免震装置を取り外し、そして、予め冷却して収縮させた新たな免震装置を配置してから、常温放置や加熱による熱膨張を行なわせて建物荷重を支持させ、その後にジャッキを取り外すようにするものも提案されている（特許文献３参照）。
特開平０９−００３９２１号公報（段落番号０００７、００２０、図１） 特開平１１−１８２０５５号公報（段落番号００１３〜００２３、図２） 特開平１０−０８８８２４号公報（段落番号００２０、図１） In addition, a jack is arranged between the lower structure and the upper structure in the seismic isolation part of an existing building, and the jack supports the structure so that the dimensions between the lower structure and the upper structure are not changed. As a condition, the following exchange method has also been proposed.
As one of them, the laminated rubber of the seismic isolation device between the lower structure and the upper structure supported by the jack is cut to remove the seismic isolation device, and higher than the seismic isolation device before the removal. A new seismic isolation device having a small size is arranged, and the jack is removed after the building load is supported by the new seismic isolation device (see, for example, Patent Document 2).
In addition, the seismic isolation device between the lower structure and the upper structure supported by the jack is cooled with a cooling device, and the laminated rubber is contracted to remove the seismic isolation device, and then cooled and contracted in advance. It has also been proposed to support a building load by placing a simple seismic isolation device and allowing thermal expansion by standing at room temperature or heating, and then removing the jack (see Patent Document 3).
Japanese Unexamined Patent Publication No. 09-003921 (paragraph numbers 0007 and 0020, FIG. 1) Japanese Patent Laid-Open No. 11-182055 (paragraph numbers 0013 to 0023, FIG. 2) Japanese Patent Laid-Open No. 10-088824 (paragraph number 0020, FIG. 1)

しかしながら、免震部の下部構造部と上部構造部との間を変えずにジャッキで支持しながら免震装置を交換する上述の方法では切断装置や冷却設備などが必要となり、免震装置の交換作業にこれらの装置や設備の設置、管理なども含まれることから、免震装置の交換作業が煩雑で手間を要するものとなる。
また、建物の免震部において免震装置は必ずしも交換するものとは限らないため、下部構造部や上部構造部を事前に補強構造として構築したり、プレストレス導入可能な構成として建物を新設する方法では、その建物を新設するときのコストを引き上げるという問題がある。
そして上述した問題は建物に限らず、橋梁などの土木構造物の免震支承を行なう免震部や、各種記念塔などの大型モニュメントの免震を行なう免震部など、各種の構築物の免震部において同様の問題である。
そこで本発明は上記事情に鑑み、建物、土木構造物、大規模モニュメントなどの既設の構築物の免震部で免震装置を交換する場合、その免震部の下部構造部と上部構造部との間をジャッキで必要最小限だけ押し広げた後、免震装置の交換作業を行ない易くするための空間を、更なるジャッキアップによることなく下部構造部と免震装置の間に、また免震装置と上部構造部の間に形成することを課題とし、切断装置や冷却設備などを用いずに免震装置の交換を行なえるようにすることを目的とする。 However, the above method of exchanging the seismic isolation device while supporting it with a jack without changing between the lower structure and the upper structure of the seismic isolation unit requires a cutting device, a cooling facility, etc. Since the work includes the installation and management of these devices and facilities, the work of exchanging the seismic isolation device is complicated and time-consuming.
In addition, since the seismic isolation device is not necessarily replaced in the seismic isolation part of the building, the lower structure part and the upper structure part are constructed in advance as a reinforcing structure, or a new building is constructed so that prestress can be introduced. In the method, there is a problem of raising the cost when the building is newly constructed.
And the above-mentioned problems are not limited to buildings. Seismic isolation for various structures such as seismic isolation for seismic isolation of civil structures such as bridges and seismic isolation for large monuments such as monuments It is a similar problem in the section.
Therefore, in view of the above circumstances, the present invention replaces the seismic isolation device with the seismic isolation device of an existing structure such as a building, civil engineering structure, large-scale monument, etc. After expanding the space with a jack to the minimum necessary, the space for facilitating the replacement work of the seismic isolation device can be made between the lower structure and the seismic isolation device without further jacking up, and the seismic isolation device. It is an object of the present invention to be able to replace the seismic isolation device without using a cutting device or a cooling facility.

本発明は上記課題を考慮してなされたもので、積層ゴムからなる免震装置を下部構造部と上部構造部との間に配置した構築物の免震部において、下部構造部と免震装置の間、又は免震装置と上部構造部の間との少なくとも一方に、挟み込みプレートが介在していることを特徴とする構築物における免震装置を用いた免震部の構造を提供して、上記課題を解消するものである。   The present invention has been made in consideration of the above problems, and in a seismic isolation part of a structure in which a seismic isolation device made of laminated rubber is disposed between a lower structure part and an upper structure part, the lower structure part and the seismic isolation apparatus Providing the structure of the seismic isolation part using the seismic isolation apparatus in the structure, characterized in that a sandwiching plate is interposed between or between the base isolation apparatus and the upper structure part, Is to eliminate.

また、もう一つの発明は、上記構造よりなる免震部の近傍にジャッキを配置して、該ジャッキにより上部構造部を持ち上げて支持し、挟み込みプレートを取り外した後に既設の免震装置を免震部から搬出し、下部構造部と新たな免震装置の間、又は新たな免震装置と上部構造部の間との少なくとも一方に前記挟み込みプレートが介在するようにこの挟み込みプレートと新たな免震装置とを下部構造部と上部構造部の間に配置し、その後、前記ジャッキにより上部構造部を免震装置側に降ろすことを特徴とする免震装置の交換方法であり、この免震装置の交換方法を提供して上記課題を解消するものである。   According to another invention, a jack is arranged in the vicinity of the seismic isolation portion having the above structure, and the upper structural portion is lifted and supported by the jack, and the existing seismic isolation device is seismically isolated after removing the sandwiching plate. The sandwich plate and the new seismic isolation so that the sandwich plate is interposed between at least one of the lower structure and the new seismic isolation device, or between the new seismic isolation device and the upper structure. The seismic isolation device replacement method is characterized in that the device is disposed between the lower structure portion and the upper structure portion, and then the upper structure portion is lowered to the seismic isolation device side by the jack. An exchange method is provided to solve the above problems.

本発明の構造によれば、免震部の下部構造部と免震装置の間、又は免震装置と上部構造部の間との少なくとも一方に挟み込みプレートが介在しているので、その挟み込みプレートに上部構造部側から加わる荷重をジャッキで支持し、そして構築物側に損傷を与えない上昇量で上部構造部をジャッキアップし、さらに挟み込みプレートを取り外すという簡易な作業を行なうだけで、下部構造部と上部構造部の間に免震装置が位置していても、上記上昇量に加えて挟み込みプレートの厚さ分の空間が新たに得られるようになり、取り外しと取り付けの際に免震装置を上げたり下げたりする範囲を上下方向に広く確保できて、免震装置の交換作業が行ない易くなる。そして簡易な構造であるため、ビルなどの建物の免震部に限定されることなく各種の構築物の免震部において実施できる。   According to the structure of the present invention, the sandwiching plate is interposed between the lower structure portion of the seismic isolation portion and the seismic isolation device or between the seismic isolation device and the upper structure portion. By simply supporting the load applied from the upper structure side with a jack, jacking up the upper structure with an ascending amount that does not damage the structure side, and removing the pinching plate, Even if a seismic isolation device is located between the upper structural parts, a space equivalent to the thickness of the sandwiching plate can be newly obtained in addition to the above-mentioned rising amount, and the seismic isolation device is raised during removal and installation. The range to be lowered or lowered can be secured widely in the vertical direction, and the seismic isolation device can be easily replaced. And since it is a simple structure, it can implement in the seismic isolation part of various structures, without being limited to the seismic isolation part of buildings, such as a building.

また、本発明の免震装置の交換方法によれば、既設の免震装置を免震部から搬出する前に挟み込みプレートを取り外すので、挟み込みプレートの厚さ分の空いた空間を免震装置交換作業に利用できるようになり、そのため、免震装置の交換に際して上部構造部をジャッキアップする上昇量を極めて少なくでき、構築物に損傷を生じさせる大きな変形を与えないようにすることができる。また、新たな免震装置を挟み込みプレートとともに下部構造部と上部構造部の間に位置させるので、次回の交換に際しても上部構造部をジャッキアップする量を同様に少なくすることができる。そして構成が簡易なものであるため、ビルなどの建物の免震部に限定されることなく各種の構築物の免震部において実施できるなど、実用性に優れた効果を奏するものである。   In addition, according to the method of replacing the seismic isolation device of the present invention, the sandwiching plate is removed before the existing seismic isolation device is carried out from the seismic isolation unit, so that the empty space corresponding to the thickness of the sandwiching plate is replaced with the seismic isolation device. It becomes possible to use it for work, and therefore, the amount of ascending to jack up the upper structure part when exchanging the seismic isolation device can be extremely reduced, and it is possible to prevent a large deformation that causes damage to the structure. In addition, since the new seismic isolation device is positioned between the lower structure portion and the upper structure portion together with the sandwiching plate, the amount of jacking up the upper structure portion can be similarly reduced in the next replacement. And since the structure is simple, it can be carried out in the seismic isolation part of various structures without being limited to the seismic isolation part of a building or the like.

つぎに本発明を図１から図９に示す建物の免震部に対して実施した例に基づいて詳細に説明する。
（免震部の構造）
図１は鉄骨造の建物における地下部に形成された免震部１の構造を示している。この免震部１にあっては下部構造部２と上部構造部３との間に免震装置４を配置し、上部構造部３側からの荷重を前記免震装置４で受けながら地震時の揺れが下部構造部２から上の建物に直接伝わらないようにこの免震装置４で揺れを低減するようにしている。
この図１に示した例の免震部１は、下部構造部２を、鉄筋コンクリートなどによりなる基礎構造体として形成し、この下部構造部２の上面での免震装置４を配置する位置に下部プレート６を設けて、この下部プレート６の上に免震装置４を配置している。本免震部１に用いられる免震装置４は積層ゴム７を上下フランジ８、９間に設けてなるものであり、下フランジ９側にあっては下ボルト１０をこの下フランジ９から下部プレート６を通して下部構造部２に埋め込まれた袋ナット１０ａに締め付けて免震装置４を下部プレート６に、即ち免震装置４を下部構造部２に固定している。 Next, the present invention will be described in detail based on an example in which the present invention is applied to the seismic isolation portion of the building shown in FIGS.
(Structure of seismic isolation part)
FIG. 1 shows a structure of a seismic isolation part 1 formed in an underground part of a steel structure building. In this seismic isolation part 1, a seismic isolation device 4 is arranged between the lower structure part 2 and the upper structure part 3, and a load from the upper structure part 3 side is received by the seismic isolation device 4 during an earthquake. The seismic isolation device 4 reduces the shaking so that the shaking is not directly transmitted from the lower structure 2 to the upper building.
In the seismic isolation part 1 of the example shown in FIG. 1, the lower structure part 2 is formed as a foundation structure made of reinforced concrete, and the lower part is located at the position where the seismic isolation device 4 is arranged on the upper surface of the lower structure part 2. A plate 6 is provided, and the seismic isolation device 4 is disposed on the lower plate 6. The seismic isolation device 4 used in the seismic isolation unit 1 is formed by providing a laminated rubber 7 between upper and lower flanges 8 and 9. On the lower flange 9 side, a lower bolt 10 is connected to the lower plate from the lower flange 9. 6, the seismic isolation device 4 is fixed to the lower plate 6, that is, the seismic isolation device 4 is fixed to the lower structure portion 2.

そして、下部構造部２に固定した免震装置４の上フランジ８には挟み込みプレート１１を介して鉄骨ベースプレート１２が重ね合され、上フランジ８から挟み込みプレート１１と鉄骨ベースプレート１２とに上ボルト１３を通してナット１３ａに締め付けていて、挟み込みプレート１１を介した状態で免震装置４を鉄骨ベースプレート１２に固定している。また、前記鉄骨ベースプレート１２上に鉄骨柱５を連結することで上部構造部３が形成され、その鉄骨柱５に鉄骨梁１４を連結していくなどにより免震部１より上層の建物が構築されている。
勿論、上部構造部３を含む上層の建物の構築は上述の例に限定されるものではなく、上記鉄骨ベースプレート１２が予め鉄骨柱５に連結されているものであってもよい。
また、上記挟み込みプレート１１はその厚さが９〜３２ｍｍの鋼板が利用されており、後述するようにこの挟み込みプレート１１の厚さは免震装置を移動させる際に用いるコロなどの棒状移動手段の径寸法より大としているものである。 A steel base plate 12 is superimposed on the upper flange 8 of the seismic isolation device 4 fixed to the lower structure portion 2 via a sandwiching plate 11, and an upper bolt 13 is passed from the upper flange 8 to the sandwiching plate 11 and the steel base plate 12. The seismic isolation device 4 is fixed to the steel base plate 12 in a state of being clamped to the nut 13 a and sandwiching the plate 11. Further, an upper structure portion 3 is formed by connecting a steel column 5 on the steel base plate 12, and a building higher than the seismic isolation portion 1 is constructed by connecting a steel beam 14 to the steel column 5. ing.
Of course, the construction of the upper building including the upper structure 3 is not limited to the above example, and the steel base plate 12 may be connected to the steel column 5 in advance.
Further, the sandwiching plate 11 is made of a steel plate having a thickness of 9 to 32 mm. As will be described later, the thickness of the sandwiching plate 11 is determined by a rod-shaped moving means such as a roller used when the seismic isolation device is moved. It is larger than the diameter dimension.

上記免震部１では、上述したように上部構造部３と免震装置４との間に挟み込みプレート１１を介在させているので、上ボルト１３を外してから前記上部構造部３をジャッキアップし、鉄骨ベースプレート１２と挟み込みプレート１１の間を１〜２ｍｍ程度のほんの僅かな必要最小限の隙間が開くようにすれば、挟み込みプレート１１自体には上部構造部３側からの荷重が加わらず、挟み込みプレート１１を単独で引き抜ける状態となる。勿論、上部構造部３に対する前記ジャッキアップ量（弾性変形復元量の数ｍｍ＋１〜２ｍｍ）もその上部構造部３や上層の建物部分に大きな変形が生じさせない上昇量であり、上部構造部３や上層の建物部分に大きな変形が生じさせない上昇を行なうだけで、挟み込みプレート１１を引き抜くことができ、引く抜かれた部分（挟み込みプレートの厚さ分の空間）を、交換のために免震装置４を上げ下げする空間として利用できるものとなり、免震装置４を上げ下げするスペースが広く確保されて交換作業が行ない易くなる。   In the seismic isolation unit 1, as described above, the sandwiching plate 11 is interposed between the upper structural unit 3 and the seismic isolation device 4, so the upper structural unit 3 is jacked up after the upper bolt 13 is removed. If a slight minimum gap of about 1 to 2 mm is opened between the steel base plate 12 and the sandwiching plate 11, the sandwiching plate 11 itself is sandwiched without applying a load from the upper structure portion 3 side. The plate 11 is pulled out alone. Of course, the amount of jack-up with respect to the upper structure portion 3 (several mm of elastic deformation and recovery amount of 1 to 2 mm) is also an increase amount that does not cause a large deformation in the upper structure portion 3 and the upper building part. It is possible to pull out the sandwiching plate 11 simply by raising the building so as not to cause a large deformation of the building. As a space to be used, the space for raising and lowering the seismic isolation device 4 is secured widely and the replacement work is facilitated.

（免震装置の交換方法）
上記構造からなる免震部１に対して免震装置４を交換する場合には、まず上ボルト１３を取り外した後にこの免震部１の近傍、好ましくは免震装置４の近傍に複数のジャッキａを配置し、上部構造部３をジャッキアップして上フランジ８上面と鉄骨ベースプレート１２下面との隙間が１〜２ｍｍ程度開くようにする。そして図２に示すように上記挟み込みプレート１１を引き抜く。これによってジャッキアップによる隙間と挟み込みプレート１１の厚さ分とからなるクリアランス（１〜２ｍｍ程度＋９〜３２ｍｍ）が確保できる。つぎに下ボルト１０を取り外した後、前記クリアランスを利用して別途に用意された持ち上げ治具（図示せず）を使用して免震装置４を図３に示すように一旦持ち上げて下部プレート６と下フランジ９との間に空間を設け、ここに後述するコロなどを挿入する。
なお、図中の矢印Ｐは持ち上げ治具による免震装置の持ち上げを示している。 (How to replace the seismic isolation device)
When exchanging the seismic isolation device 4 to the seismic isolation unit 1 having the above structure, first, after removing the upper bolt 13, a plurality of jacks are provided in the vicinity of the seismic isolation unit 1, preferably in the vicinity of the seismic isolation device 4. a is disposed, and the upper structure 3 is jacked up so that a gap between the upper surface of the upper flange 8 and the lower surface of the steel base plate 12 is opened by about 1 to 2 mm. Then, as shown in FIG. 2, the sandwiching plate 11 is pulled out. As a result, a clearance (about 1-2 mm + 9-32 mm) consisting of the gap due to jack-up and the thickness of the sandwiching plate 11 can be secured. Next, after removing the lower bolt 10, the seismic isolation device 4 is once lifted as shown in FIG. 3 by using a lifting jig (not shown) separately prepared using the clearance, and the lower plate 6. A space is provided between the lower flange 9 and a later-described roller or the like.
In addition, the arrow P in a figure has shown lifting of the seismic isolation apparatus with a lifting jig.

免震装置４の交換では、既設の免震装置４を下部プレート６の上から移動したり、新たな免震装置（既設の免震装置と同規格のもの）を下部プレート６の上に移動させたりする場合に、コロなどの棒状移動手段１５が利用され、その棒状移動手段１５の径寸法は上記挟み込みプレート１１の厚さより小さいものである。
この棒状移動手段１５を既設の免震装置４の下フランジ９と下部プレート６の間の空間に差し入れてから、上記持ち上げ治具で持ち上げていた既設の免震装置４をこの棒状移動手段１５の上に降ろし、そして、既設の免震装置４を下部構造部２と上部構造部３の間から横方向へ移動し搬出する（図４）。
つぎに、新たな免震装置４を上記棒状移動手段１５を用いながら搬入し、下部プレート６の上に位置させて、下フランジ９のボルト孔と下部プレート６のボルト孔の位置合せなどを行なう。そして、再び上記持ち上げ治具を使用してこの新たな免震装置４を若干持ち上げ(図５)、前記棒状移動手段１５を引き抜き、持ち上げ治具により新たな免震装置４を降ろして下部プレート６における免震装置設置位置に配置する。前記持ち上げ治具は新たな免震装置４を設置してから撤去する。
この後、下フランジ９を下部構造部２に下ボルト１０によりボルト結合を行なうとともに、上フランジ８と鉄骨ベースプレート１２との間に挟み込みプレート１１を配置し（図６）、ジャッキａにより上部構造部３を降ろしてから挟み込みプレート１１を介在させた状態で上フランジ板８と上部構造部３とを上ボルト１３によりボルト結合を行ない、上部構造部３からの荷重を免震装置４に支持させてからジャッキａを取り外すようにする。これによって免震装置の交換が終了する。なお、この建物の以後において、免震装置の交換が不要、或いは本発明の構造及び方法によらない場合には、挟み込みプレートの配置を省略してもよい。 When replacing the seismic isolation device 4, the existing seismic isolation device 4 is moved from above the lower plate 6, or a new seismic isolation device (of the same standard as the existing seismic isolation device) is moved onto the lower plate 6. For example, a rod-shaped moving means 15 such as a roller is used, and the diameter of the rod-shaped moving means 15 is smaller than the thickness of the sandwiching plate 11.
The rod-like moving means 15 is inserted into the space between the lower flange 9 of the existing seismic isolation device 4 and the lower plate 6, and then the existing seismic isolation device 4 lifted by the lifting jig is moved to the rod-like moving means 15. Then, the existing seismic isolation device 4 is moved laterally between the lower structure portion 2 and the upper structure portion 3 and carried out (FIG. 4).
Next, a new seismic isolation device 4 is carried in using the rod-shaped moving means 15 and positioned on the lower plate 6 to align the bolt holes of the lower flange 9 and the bolt holes of the lower plate 6. . Then, the new seismic isolation device 4 is slightly lifted again using the lifting jig (FIG. 5), the rod-like moving means 15 is pulled out, and the new seismic isolation device 4 is lowered by the lifting jig to lower the lower plate 6. The seismic isolation device is installed at the location. The lifting jig is removed after installing a new seismic isolation device 4.
Thereafter, the lower flange 9 is bolted to the lower structure portion 2 by the lower bolt 10, and the sandwiching plate 11 is disposed between the upper flange 8 and the steel base plate 12 (FIG. 6), and the upper structure portion is The upper flange plate 8 and the upper structure portion 3 are bolted by the upper bolt 13 with the sandwiching plate 11 interposed after the 3 is lowered, and the seismic isolation device 4 supports the load from the upper structure portion 3. Remove jack a. This completes the replacement of the seismic isolation device. After this building, if it is not necessary to replace the seismic isolation device, or if it is not based on the structure and method of the present invention, the arrangement of the sandwiching plate may be omitted.

上述した鉄骨造の建物における免震部の構築における実施の形態では、鉄骨ベースプレート１２と免震装置４の上フランジ８の間に挟み込みプレート１１を介在させたが、図７に示すように下部構造部２の下部プレート６と免震装置４の下フランジ９の間に挟み込みプレート１１を介在させてもよい。
この構造における免震部１において免震装置４を交換するには、まず、下ボルト１０を取り外してから上部構造部３側をジャッキアップする。このジャッキアップで上部構造部３とともに既設の免震装置４がジャッキアップされ、挟み込みプレート１１を引き抜いて取り出す必要最小限の隙間が生じた時点で、免震装置４の下フランジ９と下部プレート６の間の挟み込みプレート１１を取り出し、空いた空間に上記棒状移動手段１５を差し入れる。
つぎに持ち上げ治具により既設の免震装置４を支持しながら、上ボルト１３を取り外して既設の免震装置４と上部構造部３の連結を解き、持ち上げ治具にて既設の免震装置４を棒状移動手段１５の上に降ろす。
棒状移動手段１５の上に既設の免震装置４を降ろした後は上記実施の例と同じようにこの既設の免震装置４を搬出し、棒状移動手段１５を用いて新たな免震装置４を下部プレート６の上へ搬入して位置合せし、持ち上げ治具を利用して新たな免震装置４を若干持ち上げた状態で前記棒状移動手段１５を撤去し、新たな免震装置４をその持ち上げ治具により下部プレート６の免震装置設置位置に降ろして下フランジ９を下ボルト１０にて下部構造部２にボルト結合する。
そして、上フランジ８と鉄骨ベースプレート１２との間に挟み込みプレート１１を配置し、ジャッキａにより上部構造部３を降ろしてから挟み込みプレート１１を介在させた状態で上フランジ８と上部構造部３とを上ボルト１３によりボルト結合を行ない、上部構造部３からの荷重を新たな免震装置４に支持させてからジャッキａを取り外すようにする。このようにして免震装置４の交換が終了する。 In the embodiment in the construction of the seismic isolation part in the steel building described above, the sandwiching plate 11 is interposed between the steel base plate 12 and the upper flange 8 of the seismic isolation device 4, but as shown in FIG. A sandwiching plate 11 may be interposed between the lower plate 6 of the part 2 and the lower flange 9 of the seismic isolation device 4.
In order to replace the seismic isolation device 4 in the seismic isolation portion 1 in this structure, first, the lower bolt 10 is removed and then the upper structure portion 3 side is jacked up. With this jack-up, the existing seismic isolation device 4 is jacked up together with the upper structure 3, and when a necessary minimum gap is generated by pulling out the pinching plate 11, the lower flange 9 and the lower plate 6 The sandwiching plate 11 between them is taken out, and the rod-shaped moving means 15 is inserted into the empty space.
Next, while supporting the existing seismic isolation device 4 with the lifting jig, the upper bolt 13 is removed to disconnect the existing seismic isolation device 4 from the upper structure portion 3, and the existing seismic isolation device 4 with the lifting jig. Is lowered onto the rod-shaped moving means 15.
After the existing seismic isolation device 4 is lowered onto the rod-shaped moving means 15, the existing seismic isolation device 4 is carried out in the same manner as in the above embodiment, and a new seismic isolation device 4 is used using the rod-shaped moving means 15. Is moved onto the lower plate 6 and aligned, and the bar-shaped moving means 15 is removed while the new seismic isolation device 4 is slightly lifted using a lifting jig, and the new seismic isolation device 4 is The lower flange 9 is lowered to the seismic isolation device installation position of the lower plate 6 by the lifting jig and the lower flange 9 is bolted to the lower structure portion 2 by the lower bolt 10.
Then, the sandwiching plate 11 is arranged between the upper flange 8 and the steel base plate 12, and the upper flange 8 and the upper structure portion 3 are placed with the sandwiching plate 11 interposed after the upper structure portion 3 is lowered by the jack a. The bolts are connected by the upper bolts 13, and the jack a is removed after the load from the upper structure portion 3 is supported by the new seismic isolation device 4. In this way, the exchange of the seismic isolation device 4 is completed.

免震装置４の交換に際して免震装置４の下フランジ９と下部構造部２の間に介在していた挟み込みプレート１１は、交換後に必ずしも再び下フランジ９と下部構造部２の間に位置させる必要はなく、本発明の交換方法では上述の例のように上部構造部３と免震装置４の上フランジ８の間に位置させることが可能である。   The pinching plate 11 interposed between the lower flange 9 and the lower structure portion 2 when the seismic isolation device 4 is replaced needs to be positioned between the lower flange 9 and the lower structure portion 2 again after the replacement. Rather, in the replacement method of the present invention, it is possible to locate between the upper structure portion 3 and the upper flange 8 of the seismic isolation device 4 as in the above example.

また、本発明の免震部の構造では、図８に示されているように鉄骨ベースプレート１２と免震装置４の上フランジ８の間と、下部プレート６と免震装置４の下フランジ９の間とのそれぞれに挟み込みプレート１１を介在させるようにすることも可能である。そして、この構造の免震部１の免震装置４を交換するに際して、上述のように取り外す挟み込みプレート１１は上下の何れかを選択すればよく、また、上下両方の挟み込みプレート１１を共に取り外すようにしてもよい。   Further, in the structure of the seismic isolation portion of the present invention, as shown in FIG. 8, between the steel base plate 12 and the upper flange 8 of the seismic isolation device 4, and between the lower plate 6 and the lower flange 9 of the seismic isolation device 4. It is also possible to interpose the sandwiching plate 11 between each. And when exchanging the seismic isolation device 4 of the seismic isolation part 1 of this structure, it is sufficient to select either the upper or lower sandwich plate 11 to be removed as described above, and to remove both the upper and lower sandwich plates 11 together. It may be.

また、本発明は、鉄筋コンクリート造や鉄骨鉄筋コンクリート造の建物における免震部でも実施できる。図９はその例を示しているもので、上述した鉄骨造の建物の場合と同じように、下部構造部２に下ボルト１０にて固定された免震装置４の上フランジ８の上に挟み込みプレート１１を介在させて上部プレート１６をその上フランジ８側からの上ボルト１７（この上ボルト１７は上部構造部３のコンクリートに埋め込まれる袋ナット１７ａに締め付けている）によりボルト結合し、その後上部構造部３を形成して上層を構築しているものである。
この例でも免震装置４の交換手順は上述した鉄骨造の建物での交換手順と同じであり、また、挟み込みプレート１１を免震装置４の下部側に介在させたり、免震装置４の上部側と下部側との両方に介在させたりすることも、上記鉄骨造の場合と同じように可能である。 Moreover, this invention can be implemented also in the seismic isolation part in the building of a reinforced concrete structure or a steel frame reinforced concrete structure. FIG. 9 shows an example of this, and as in the case of the steel structure building described above, it is sandwiched on the upper flange 8 of the seismic isolation device 4 fixed to the lower structure 2 with the lower bolt 10. With the plate 11 interposed, the upper plate 16 is bolted by an upper bolt 17 from the upper flange 8 side (the upper bolt 17 is fastened to a cap nut 17a embedded in the concrete of the upper structure portion 3), and then the upper portion The upper part is constructed by forming the structure part 3.
Also in this example, the replacement procedure of the seismic isolation device 4 is the same as the replacement procedure in the steel structure building described above, and the sandwiching plate 11 is interposed on the lower side of the seismic isolation device 4 or the upper part of the seismic isolation device 4. It is possible to interpose both the side and the lower side as in the case of the steel structure.

さらに、上述した各実施の形態では免震部が建物の基礎構造体上に形成されているものとして説明したが、建物の中間層或いは中間部に建物免震部が設定される場合でも本発明は実施できるものであり、その場合に下部構造部は鉄筋コンクリートの構造体に限定されず、鉄骨による構造体であってもよいものである。また、挟み込みプレートは一枚の鋼板からなるものとしたり、複数枚の鋼板が積層されたものとすることも可能であり、そして、プレート面を複数に分割することができるものであってもよい。   Further, in each of the above-described embodiments, the seismic isolation portion is described as being formed on the foundation structure of the building. However, the present invention is applicable even when the building seismic isolation portion is set in an intermediate layer or an intermediate portion of the building. In this case, the lower structure is not limited to a reinforced concrete structure, and may be a structure made of steel. Further, the sandwiching plate may be made of a single steel plate, or may be a laminate of a plurality of steel plates, and may be capable of dividing the plate surface into a plurality of pieces. .

積層ゴムからなる免震装置では長期使用によってクリープ変形することがある。そのため、免震装置の交換に際し、既設の免震装置がクリープ変形していて、交換する新設の免震装置の高さ寸法が、前記既設の免震装置の建物新築時の高さ寸法と同寸法である場合には、ジャッキアップ量をその分だけ増すこととする。なお、クリープ量は長期においても数ｍｍと予想されるが、ジャッキ本数、ジャッキ設置位置の適切な選択により、上部構造部に悪影響を与えることなく施工できる。さらに交換時において、高さ寸法を前記クリープ分低くしても同程度の性能を有する免震装置が開発されていれば、クリープ量をジャッキアップ時に考慮する必要が無くなる。   In a seismic isolation device made of laminated rubber, creep deformation may occur with long-term use. Therefore, when the seismic isolation device is replaced, the existing seismic isolation device is creep-deformed, and the height of the new seismic isolation device to be replaced is the same as the height of the existing seismic isolation device when the building is newly constructed. If it is a dimension, the jack-up amount is increased accordingly. Although the creep amount is expected to be several mm even in the long term, construction can be performed without adversely affecting the upper structure portion by appropriately selecting the number of jacks and the jack installation position. Further, if a seismic isolation device having the same level of performance is developed even when the height is reduced by the amount of the creep at the time of replacement, it is not necessary to consider the amount of creep when jacking up.

上述した各実施の形態は建物の免震部に実施した例として説明したが、本発明はこれらの実施の形態に限定されるものではなく、橋梁などの土木構造物での免震支承を行なう免震部や、記念塔などの大型モニュメントでの免震部のように各種の構築物の免震部について実施できるものである。   Although each embodiment mentioned above was demonstrated as an example implemented to the seismic isolation part of a building, the present invention is not limited to these embodiments, and performs seismic isolation support in civil engineering structures, such as a bridge. It can be implemented for seismic isolation parts of various structures, such as seismic isolation parts and seismic isolation parts for large monuments such as monuments.

本発明の構築物における免震装置を用いた建物免震部の構造の一例を示す説明図である。It is explanatory drawing which shows an example of the structure of the building seismic isolation part using the seismic isolation apparatus in the structure of this invention. 本発明の免震装置の交換方法の一例において上部構造部をジャッキアップして挟み込みプレートを取り外した状態を示す説明図である。It is explanatory drawing which shows the state which jacked up the upper structure part and removed the pinching plate in an example of the replacement method of the seismic isolation apparatus of this invention. 交換方法の一例において既設の免震装置を持ち上げた状態を示す説明図である。It is explanatory drawing which shows the state which lifted the existing seismic isolation apparatus in an example of the exchange method. 交換方法の一例において既設の免震装置の搬出を示す説明図である。It is explanatory drawing which shows carrying out of the existing seismic isolation apparatus in an example of the exchange method. 交換方法の一例において搬入された新たな免震装置を持ち上げて棒状移動手段を配置した状態を示す説明図である。It is explanatory drawing which shows the state which lifted the new seismic isolation apparatus carried in in an example of the exchange method, and has arrange | positioned the rod-shaped moving means. 交換方法の一例において新たな免震装置の上に挟み込みプレートを配置した状態を示す説明図である。It is explanatory drawing which shows the state which has pinched | interposed the plate on the new seismic isolation apparatus in an example of the exchange method. 鉄骨造での建物免震部の他の例を示す説明図である。It is explanatory drawing which shows the other example of the building seismic isolation part by steel structure. 同じく鉄骨造での建物免震部の他の例を示す説明図である。It is explanatory drawing which shows the other example of the building seismic isolation part similarly by steel structure. 鉄筋コンクリート造や鉄骨鉄筋コンクリート造での建物免震部の一例を示す説明図である。It is explanatory drawing which shows an example of the building seismic isolation part in a reinforced concrete structure or a steel frame reinforced concrete structure.

符号の説明Explanation of symbols

１…免震部
２…下部構造部
３…上部構造部
４…免震装置
６…下部プレート
８…上フランジ
９…下フランジ
１１…挟み込みプレート
１２…鉄骨ベースプレート
１５…棒状移動手段
１６…上部プレート DESCRIPTION OF SYMBOLS 1 ... Seismic isolation part 2 ... Lower structure part 3 ... Upper structure part 4 ... Seismic isolation device 6 ... Lower plate 8 ... Upper flange 9 ... Lower flange 11 ... Clamping plate 12 ... Steel base plate 15 ... Rod-shaped moving means 16 ... Upper plate

Claims (2)

積層ゴムからなる免震装置を下部構造部と上部構造部との間に配置した構築物の免震部において、
下部構造部と免震装置の間、又は免震装置と上部構造部の間との少なくとも一方に、挟み込みプレートが介在していることを特徴とする構築物における免震装置を用いた免震部の構造。 In the seismic isolation part of the structure where the seismic isolation device made of laminated rubber is placed between the lower structure part and the upper structure part,
The seismic isolation unit using the seismic isolation device in the structure is characterized in that a sandwiching plate is interposed between the lower structure part and the seismic isolation device or between the seismic isolation device and the upper structure part. Construction. 請求項１の構造よりなる免震部の近傍にジャッキを配置して、該ジャッキにより上部構造部を持ち上げて支持し、挟み込みプレートを取り外した後に既設の免震装置を免震部から搬出し、
下部構造部と新たな免震装置の間、又は新たな免震装置と上部構造部の間との少なくとも一方に前記挟み込みプレートが介在するようにこの挟み込みプレートと新たな免震装置とを下部構造部と上部構造部の間に配置し、その後、前記ジャッキにより上部構造部を免震装置側に降ろすことを特徴とする免震装置の交換方法。 A jack is arranged in the vicinity of the seismic isolation portion having the structure of claim 1, the upper structure portion is lifted and supported by the jack, and the existing seismic isolation device is removed from the seismic isolation portion after removing the sandwiching plate,
The sandwiching plate and the new seismic isolation device are connected to the lower structure so that the sandwiching plate is interposed between at least one of the lower structure portion and the new seismic isolation device, or between the new seismic isolation device and the upper structure portion. The seismic isolation device replacement method is characterized in that the seismic isolation device is disposed between the upper structure portion and the upper structure portion, and then the upper structure portion is lowered to the seismic isolation device side by the jack.
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Cited By (8)

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JP2010281069A (en) * 2009-06-03 2010-12-16 Shimizu Corp Base-isolated structure of building of column-capital base-isolated steel construction
JP2012127140A (en) * 2010-12-16 2012-07-05 Ohbayashi Corp Base isolation structure of railroad station, construction method thereof, and replacement method of base isolation device at railroad station
JP5259868B1 (en) * 2012-10-26 2013-08-07 孝典 佐藤 Seismic isolation system for structures
CN104005484A (en) * 2013-02-26 2014-08-27 杰斯韩国株式会社 Isolation device and isolation structure portion replacement method and load control method
WO2014133226A1 (en) * 2013-03-01 2014-09-04 (주)제이스코리아 Vibration isolation device, exchange method of vibration isolation structure part and load control method of vibration isolation structure part
JP2016084695A (en) * 2015-06-10 2016-05-19 オイレス工業株式会社 Method for removing seismic isolator from between lower structure and upper structure, and method for installing new seismic isolator between them
JP2017071955A (en) * 2015-10-07 2017-04-13 株式会社竹中工務店 Construction method for structure
JP2018021373A (en) * 2016-08-03 2018-02-08 株式会社竹中工務店 Fire resistant structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010281069A (en) * 2009-06-03 2010-12-16 Shimizu Corp Base-isolated structure of building of column-capital base-isolated steel construction
JP2012127140A (en) * 2010-12-16 2012-07-05 Ohbayashi Corp Base isolation structure of railroad station, construction method thereof, and replacement method of base isolation device at railroad station
JP5259868B1 (en) * 2012-10-26 2013-08-07 孝典 佐藤 Seismic isolation system for structures
CN104005484A (en) * 2013-02-26 2014-08-27 杰斯韩国株式会社 Isolation device and isolation structure portion replacement method and load control method
CN104005484B (en) * 2013-02-26 2016-12-28 盐城三笑餐饮有限公司 Isolating device, the method changing isolation structure portion and the method controlling its load
WO2014133226A1 (en) * 2013-03-01 2014-09-04 (주)제이스코리아 Vibration isolation device, exchange method of vibration isolation structure part and load control method of vibration isolation structure part
JP2016084695A (en) * 2015-06-10 2016-05-19 オイレス工業株式会社 Method for removing seismic isolator from between lower structure and upper structure, and method for installing new seismic isolator between them
JP2017071955A (en) * 2015-10-07 2017-04-13 株式会社竹中工務店 Construction method for structure
JP2018021373A (en) * 2016-08-03 2018-02-08 株式会社竹中工務店 Fire resistant structure

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