JP6653163B2 - Installation method of seismic isolation bearing and torsion adjustment device - Google Patents

Installation method of seismic isolation bearing and torsion adjustment device Download PDF

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JP6653163B2
JP6653163B2 JP2015232055A JP2015232055A JP6653163B2 JP 6653163 B2 JP6653163 B2 JP 6653163B2 JP 2015232055 A JP2015232055 A JP 2015232055A JP 2015232055 A JP2015232055 A JP 2015232055A JP 6653163 B2 JP6653163 B2 JP 6653163B2
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seismic isolation
isolation bearing
flange
torsion
body portion
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JP2017096062A (en
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朋之 高塚
朋之 高塚
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Toyo Tire Corp
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Description

本発明は、下部構造物と上部構造物との間隙に免震支承を設置する方法と、その方法に用いられる捩れ調整器具に関する。   The present invention relates to a method of installing a seismic isolation bearing in a gap between a lower structure and an upper structure, and a torsion adjusting device used in the method.

図１には、下部構造物である建物基礎２と上部構造物である建物躯体３との間隙に設置された免震支承４を示す。免震支承４は、下側フランジ４２及び上側フランジ４３に取り付けたボルト４０を介して、建物基礎２と建物躯体３に固定されている。免震支承を取り替える工事では、ボルト４０を取り外して既設の免震支承４を撤去したうえで、図２のように新たな免震支承１を間隙に配置し、下側フランジ１２と上側フランジ１３のボルト孔１４にボルトを取り付けて、その免震支承１を固定することになる。   FIG. 1 shows a seismic isolation bearing 4 installed in a gap between a building foundation 2 as a lower structure and a building frame 3 as an upper structure. The seismic isolation bearing 4 is fixed to the building foundation 2 and the building frame 3 via bolts 40 attached to the lower flange 42 and the upper flange 43. In the construction for replacing the seismic isolation bearing, the bolt 40 is removed, the existing seismic isolation bearing 4 is removed, and a new seismic isolation bearing 1 is arranged in the gap as shown in FIG. A bolt is attached to the bolt hole 14 to fix the seismic isolation bearing 1.

ところが、地震によって建物躯体３が歪んでいるなどの理由により、新たな免震支承１のボルト孔１４と構造物側のボルト孔とが僅かに位置ずれしていることがある。この場合、免震支承１の下側フランジ１２を建物基礎２に固定した後で、上側フランジ１３を建物躯体３に固定する際に、それらのボルト孔の位置ずれを矯正しなければならず、現場で煩雑な作業が強いられる。かかる不都合は、上側フランジ１３を先に固定し、その後に下側フランジ１２を固定する場合も同じである。   However, the bolt holes 14 of the new seismic isolation bearing 1 and the bolt holes on the structure side may be slightly misaligned due to the distortion of the building frame 3 due to the earthquake. In this case, when fixing the upper flange 13 to the building frame 3 after fixing the lower flange 12 of the seismic isolation bearing 1 to the building foundation 2, it is necessary to correct the displacement of the bolt holes. Complicated work is forced on site. This inconvenience is the same when the upper flange 13 is fixed first and then the lower flange 12 is fixed.

特許文献１には、フレームの内側に設置した複数のジャッキにより免震支承の下端部（下側フランジ）を押圧するように構成された位置調整装置が記載されている。しかし、この装置では、ジャッキの伸長方向に沿って免震支承の下端部を移動できるに過ぎず、免震支承の軸周り方向にボルト孔が位置ずれしている場合には対応できない。このような軸周り方向の位置ずれを矯正するには免震支承の捩れを調整する必要があるが、上記文献はその解決手段を開示するものではない。   Patent Literature 1 describes a position adjusting device configured to press a lower end portion (lower flange) of a seismic isolation bearing with a plurality of jacks installed inside a frame. However, this device can only move the lower end of the seismic isolation bearing along the extension direction of the jack, and cannot cope with the case where the bolt holes are displaced in the direction around the axis of the seismic isolation bearing. It is necessary to adjust the torsion of the seismic isolation bearing in order to correct such a displacement around the axis, but the above document does not disclose any solution.

特開２００１−２７２８２号公報JP 2001-27282 A

本発明は上記実情に鑑みてなされたものであり、その目的は、免震支承の軸周り方向におけるボルト孔の位置ずれを矯正できる免震支承の設置方法と、その方法に用いられる捩れ調整器具を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of installing a seismic isolation bearing capable of correcting a displacement of a bolt hole in a direction around an axis of the seismic isolation bearing, and a torsion adjusting device used in the method Is to provide.

上記目的は、下記の如き本発明により達成することができる。即ち、本発明に係る免震支承の設置方法は、下部構造物と上部構造物との間隙に免震支承を配置する工程と、前記免震支承の下側フランジに装着される下側部材と、前記免震支承の上側フランジに装着される上側部材とを備え、それらが相対的に水平移動自在に組み合わされた捩れ調整器具を、前記免震支承を挟んで対向する二箇所に取り付ける工程と、平行で逆向きの一対の力が前記下側フランジまたは前記上側フランジに作用するように前記下側部材と前記上側部材とを相対的に水平移動させ、それに伴う前記下側フランジと前記上側フランジとの相対回転により前記免震支承の捩れを調整する工程と、前記下側フランジ及び前記上側フランジが、それぞれ前記下部構造物及び前記上部構造物に固定された状態にする工程と、を備えるものである。この方法によれば、上記の如く捩れ調整器具を用いて免震支承の捩れを調整することにより、免震支承の軸周り方向におけるボルト孔の位置ずれを簡便に矯正できる。   The above object can be achieved by the present invention as described below. That is, the method of installing a seismic isolation bearing according to the present invention includes the steps of arranging a seismic isolation bearing in a gap between a lower structure and an upper structure, And an upper member mounted on an upper flange of the seismic isolation bearing, and attaching a torsion adjusting device in which they are relatively horizontally movable to each other at two positions opposed to each other with the seismic isolation bearing interposed therebetween. Moving the lower member and the upper member relatively horizontally so that a pair of parallel and opposite forces acts on the lower flange or the upper flange, and accompanying the lower flange and the upper flange, Adjusting the torsion of the seismic isolation bearing by relative rotation of the lower flange and the upper flange, respectively, and fixing the lower flange and the upper flange to the lower structure and the upper structure, respectively. It is. According to this method, the displacement of the bolt hole in the direction around the axis of the seismic isolation bearing can be easily corrected by adjusting the torsion of the seismic isolation bearing using the torsion adjusting device as described above.

前記免震支承の捩れを調整する工程の前に、前記下側フランジを前記下部構造物に固定し、または前記上側フランジを前記上部構造物に固定しておき、前記免震支承の捩れを調整する工程では、前記下側フランジ及び前記上側フランジの何れか固定されていない方に前記一対の力を作用させることが好ましい。この方法によれば、下側フランジ及び上側フランジの何れか固定されていない方のボルト孔を構造物側のボルト孔に一致させやすくなるため、ボルト孔の位置ずれをより簡便に矯正できる。   Before the step of adjusting the torsion of the seismic isolation bearing, the lower flange is fixed to the lower structure, or the upper flange is fixed to the upper structure, and the torsion of the seismic isolation bearing is adjusted. In the step of performing, it is preferable that the pair of forces act on one of the lower flange and the upper flange that is not fixed. According to this method, the bolt hole that is not fixed, which is either the lower flange or the upper flange, can be easily aligned with the bolt hole on the structure side, so that the displacement of the bolt hole can be corrected more easily.

前記下側フランジの複数のボルト孔に前記下側部材を係合させ、前記上側フランジの複数のボルト孔に前記上側部材を係合させることにより、前記捩れ調整器具を前記免震支承に取り付けることが好ましい。これにより、下側フランジと上側フランジに形成されたボルト孔を利用して、捩れ調整器具を取り付けることができる。   By attaching the lower member to the plurality of bolt holes of the lower flange and engaging the upper member with the plurality of bolt holes of the upper flange, attaching the torsion adjusting device to the seismic isolation bearing. Is preferred. Thereby, the torsion adjusting device can be attached using the bolt holes formed in the lower flange and the upper flange.

本発明に係る捩れ調整器具は、下部構造物と上部構造物との間隙に設置される免震支承の下側フランジに装着される下側部材と、前記免震支承の上側フランジに装着される上側部材とを備え、前記下側部材が、前記下側フランジの上面に接合される下側ベース部と、前記下側ベース部の上方に設けられた下側ボディ部とを有し、前記上側部材が、前記上側フランジの下面に接合される上側ベース部と、前記上側ベース部の下方に設けられた上側ボディ部とを有し、前記下側ボディ部と前記上側ボディ部との間に、それらの相対的な水平移動を操作可能な位置調整部材が取り付けられ、前記位置調整部材が、前記下側ボディ部及び前記上側ボディ部の一方に螺合され且つその先端が他方に当接するネジ部材により構成されている。この捩れ調整器具は、上述のように用いることにより免震支承の捩れを調整できることから、免震支承の軸周り方向におけるボルト孔の位置ずれの矯正に供せられる。そして、ネジ部材の回転操作によって免震支承の捩れを精度良く調整できる。 The torsion adjusting device according to the present invention is mounted on a lower member mounted on a lower flange of a seismic isolation bearing installed in a gap between a lower structure and an upper structure, and mounted on an upper flange of the seismic isolation bearing. An upper member, wherein the lower member has a lower base portion joined to an upper surface of the lower flange, and a lower body portion provided above the lower base portion; A member has an upper base portion joined to the lower surface of the upper flange, and an upper body portion provided below the upper base portion, between the lower body portion and the upper body portion, A screw member is attached with a position adjusting member capable of operating relative horizontal movement thereof, and the position adjusting member is screwed to one of the lower body portion and the upper body portion, and a tip of the screw member contacts the other. It consists of. Since the torsion adjusting device can adjust the torsion of the seismic isolation bearing by using as described above, it is used for correcting the displacement of the bolt hole in the direction around the axis of the seismic isolation bearing. And the torsion of the seismic isolation bearing can be adjusted with high precision by rotating the screw member.

下部構造物と上部構造物との間隙に設置された既設の免震支承を示す正面図Front view showing the existing seismic isolation bearing installed in the gap between the lower structure and the upper structure 下部構造物と上部構造物との間隙に配置された免震支承を示す正面図Front view showing seismic isolation bearings located in the gap between the lower structure and the upper structure 捩れ調整器具を取り付けた免震支承の（ａ）平面図と（ｂ）正面図(A) Plan view and (b) Front view of seismic isolation bearing with twist adjustment device 捩れ調整器具の下側部材と上側部材を分離させて示す正面図Front view showing the lower and upper members of the torsion adjusting device separated from each other 捩れ調整器具の（ａ）平面図、（ｂ）正面図、及び、（ｃ）側面図(A) Plan view, (b) front view, and (c) side view of a torsion adjusting device

本発明の実施形態について図面を参照しながら説明する。   An embodiment of the present invention will be described with reference to the drawings.

図１は、下部構造物である建物基礎２と上部構造物である建物躯体３との間隙に設置された免震支承４を示す。免震支承４は、下側フランジ４２と上側フランジ４３に取り付けたボルト４０を介して固定されている。建物基礎２と建物躯体３には、それぞれ鋼板などの剛性板からなるベースプレート２０，３０が固着され、その各々にボルト４０が螺合される複数のボルト孔が形成されている。免震支承を取り替える工事では、ボルト４０を取り外して既設の免震支承４を撤去するとともに、それに代えて新たな免震支承を設置することになる。以下、新たな免震支承を設置する方法について説明する。   FIG. 1 shows a seismic isolation bearing 4 installed in a gap between a building foundation 2 as a lower structure and a building frame 3 as an upper structure. The seismic isolation bearing 4 is fixed via bolts 40 attached to the lower flange 42 and the upper flange 43. Base plates 20, 30 each made of a rigid plate such as a steel plate are fixed to the building foundation 2 and the building frame 3, and a plurality of bolt holes into which the bolts 40 are screwed are formed in each of the base plates. In the construction for replacing the seismic isolation bearing, the bolt 40 is removed and the existing seismic isolation bearing 4 is removed, and a new seismic isolation bearing is installed instead. The following describes how to install a new seismic isolation bearing.

まず、図２に示すように、既設の免震支承４を撤去した後の建物基礎２と建物躯体３との間隙に免震支承１を配置する。免震支承１は、既設の免震支承４と同様に構成された積層ゴム型の免震支承である。図示を省略しているが、建物基礎２と建物躯体３との間隙にはジャッキアップ装置が設置されており、必要に応じて免震支承１と建物躯体３との間に隙間が設けられる。既設の免震支承４を撤去してから免震支承１の設置が完了するまでの間は、そのジャッキアップ装置が建物躯体３の荷重を受ける。   First, as shown in FIG. 2, the seismic isolation bearing 1 is disposed in the gap between the building foundation 2 and the building frame 3 after the existing seismic isolation bearing 4 is removed. The seismic isolation bearing 1 is a laminated rubber type seismic isolation bearing configured similarly to the existing seismic isolation bearing 4. Although not shown, a jack-up device is installed in a gap between the building foundation 2 and the building frame 3, and a gap is provided between the seismic isolation bearing 1 and the building frame 3 as necessary. During the period from the removal of the existing seismic isolation bearing 4 to the completion of the installation of the seismic isolation bearing 1, the jack-up device receives the load of the building frame 3.

免震支承１は、柱状または筒状をなす胴体１１と、胴体１１の下端に形成された下側フランジ１２と、胴体１１の上端に形成された上側フランジ１３とを備える。胴体１１は、ゴムなどの弾性体と鋼板などの剛性体とを交互に積層して構成されている。下側フランジ１２と上側フランジ１３には、それぞれ複数の（本実施形態では１２個の）ボルト孔１４が形成されている（図３（ａ）参照）。ボルト孔１４は、免震支承１の軸周り方向（中心軸Ｃ周りの方向）に沿って等間隔に配列されている。   The base isolation bearing 1 includes a body 11 having a columnar or tubular shape, a lower flange 12 formed at a lower end of the body 11, and an upper flange 13 formed at an upper end of the body 11. The body 11 is configured by alternately stacking elastic bodies such as rubber and rigid bodies such as steel plates. A plurality of (twelve in this embodiment) bolt holes 14 are formed in each of the lower flange 12 and the upper flange 13 (see FIG. 3A). The bolt holes 14 are arranged at equal intervals along the direction around the axis of the seismic isolation bearing 1 (direction around the central axis C).

地震によって建物躯体３が歪んでいるなどの事情により、免震支承１のボルト孔１４と構造物（建物基礎２及び建物躯体３）側のボルト孔とが僅かに位置ずれしている場合、そのボルト孔の位置ずれを現場で矯正する必要がある。特に免震支承１の軸周り方向におけるボルト孔の位置ずれを矯正するには、免震支承１の捩れを調整しなければならないため難儀である。本実施形態では、後述する方法により免震支承１の捩れを調整し、軸周り方向におけるボルト孔の位置ずれを矯正する例を示す。   If the bolt holes 14 of the seismic isolation bearing 1 and the bolt holes of the structure (the building foundation 2 and the building frame 3) are slightly misaligned due to the fact that the building frame 3 is distorted due to the earthquake, etc. It is necessary to correct the displacement of the bolt holes on site. In particular, it is difficult to correct the displacement of the bolt hole in the direction around the axis of the seismic isolation bearing 1 because the twist of the seismic isolation bearing 1 must be adjusted. In the present embodiment, an example will be described in which the torsion of the seismic isolation bearing 1 is adjusted by a method described later to correct the displacement of the bolt hole in the direction around the axis.

次に、図３に示すように、免震支承１を挟んで対向する二箇所に、捩れ調整器具５を取り付ける。この捩れ調整器具５を取り付ける工程は、建物基礎２と建物躯体３との間隙に免震支承１を配置する工程の前でもよい。即ち、捩れ調整器具５を免震支承１に取り付けてから、その免震支承１を建物基礎２と建物躯体３との間隙に配置しても構わない。   Next, as shown in FIG. 3, the torsion adjusting device 5 is attached to two places facing each other with the seismic isolation bearing 1 interposed therebetween. The step of attaching the torsion adjusting device 5 may be before the step of disposing the seismic isolation bearing 1 in the gap between the building foundation 2 and the building frame 3. That is, after the torsion adjusting device 5 is attached to the seismic isolation bearing 1, the seismic isolation bearing 1 may be disposed in the gap between the building foundation 2 and the building frame 3.

捩れ調整器具５は、図４，５に示すように、下側フランジ１２に装着される下側部材５１と、上側フランジ１３に装着される上側部材５２とを備え、それらが相対的に水平移動自在に組み合わされている。この水平移動は直線的な移動でよく、本実施形態では図３の左右方向の移動となる。   As shown in FIGS. 4 and 5, the torsion adjusting device 5 includes a lower member 51 mounted on the lower flange 12 and an upper member 52 mounted on the upper flange 13, which relatively move horizontally. They are freely combined. This horizontal movement may be a linear movement, and in the present embodiment, is a horizontal movement in FIG.

本実施形態では、下側部材５１が、下側フランジ１２の上面に接合される下側ベース部５１ａと、その下側ベース部５１ａの上方に設けられた下側ボディ部５１ｂとを有し、上側部材５２が、上側フランジ１３の下面に接合される上側ベース部５２ａと、上側ベース部５２ａの下方に設けられた上側ボディ部５２ｂとを有する。これらのベース部とボディ部とは、それぞれ図５（ｃ）のように側面視で略Ｌ字状をなす。下側ボディ部５１ｂと上側ボディ部５２ｂとの間には、それらの相対的な水平移動を操作可能な位置調整部材としてのネジ部材５３が取り付けられている。   In the present embodiment, the lower member 51 has a lower base portion 51a joined to the upper surface of the lower flange 12, and a lower body portion 51b provided above the lower base portion 51a, The upper member 52 has an upper base portion 52a joined to the lower surface of the upper flange 13, and an upper body portion 52b provided below the upper base portion 52a. Each of the base portion and the body portion has a substantially L shape in a side view as shown in FIG. A screw member 53 is attached between the lower body portion 51b and the upper body portion 52b as a position adjustment member capable of operating relative horizontal movement thereof.

下側ベース部５１ａは、板状に形成され、その下面には下側フランジ１２の周縁部が嵌合される凹み５１ｃが設けられている。下側フランジ１２の径方向における凹み５１ｃの大きさは、下側フランジ１２に対して遊びが設けられる寸法に設定されている。また、下側ベース部５１ａには、下側フランジ１２のボルト孔１５に対応した一対の貫通孔が形成され、その各々にボルト５１ｄが装着されている。貫通孔の内径は、ボルト５１ｄに対して遊びが設けられる寸法に設定されている。これらの遊びは、僅かな捩れを調整するうえで然程大きくする必要はないが、適宜に変更してもよい。   The lower base portion 51a is formed in a plate shape, and a lower surface thereof is provided with a recess 51c into which a peripheral portion of the lower flange 12 is fitted. The size of the recess 51 c in the radial direction of the lower flange 12 is set to a size that allows play for the lower flange 12. A pair of through holes corresponding to the bolt holes 15 of the lower flange 12 are formed in the lower base portion 51a, and a bolt 51d is mounted on each of the through holes. The inner diameter of the through-hole is set to a size that allows play for the bolt 51d. These play do not need to be so large to adjust the slight twist, but may be changed appropriately.

上側ベース部５２ａは、下側ベース部５１ａを上下反転したものに相当し、上記と同様に、上側フランジ１３の周縁部が嵌合される凹み５２ｃと、ボルト５２ｄが装着される一対の貫通孔が設けられている。ボルト５１ｄ，５２ｄは、図５（ｃ）にのみ示す。   The upper base portion 52a corresponds to the lower base portion 51a turned upside down, and similarly to the above, a recess 52c into which the peripheral portion of the upper flange 13 is fitted, and a pair of through holes into which bolts 52d are mounted. Is provided. The bolts 51d and 52d are shown only in FIG.

下側部材５１のボルト５１ｄと上側部材５２のボルト５２ｄは、それぞれネジ孔であるボルト孔１５に螺合される。このように、本実施形態では、下側フランジ１２の複数の（本実施形態では二つの）ボルト孔１５に下側部材５１を係合させ、上側フランジ１３の複数の（本実施形態では二つの）ボルト孔１５に上側部材５２を係合させることにより、捩れ調整器具５を免震支承１に取り付ける。ボルト孔１５は、図３（ａ）のように免震支承１を挟んで対向する二箇所に二つずつ形成されている。これらはボルト孔１４とは異なり通常の設置状態では特に使用されず、輸送時の吊りボルトの装着などに供される。   The bolt 51d of the lower member 51 and the bolt 52d of the upper member 52 are screwed into the bolt holes 15 which are screw holes. As described above, in the present embodiment, the lower member 51 is engaged with the plurality of (two in this embodiment) bolt holes 15 of the lower flange 12, and the plurality of (two in this embodiment) ) The torsion adjusting device 5 is attached to the base isolation bearing 1 by engaging the upper member 52 with the bolt hole 15. As shown in FIG. 3A, two bolt holes 15 are formed at two locations facing each other with the seismic isolation bearing 1 interposed therebetween. Unlike the bolt holes 14, these are not particularly used in a normal installation state, and are used for mounting suspension bolts during transportation.

ネジ部材５３は、下側ボディ部５１ｂに螺合され且つその先端が上側ボディ部５２ｂに当接しており、これらの位置関係は逆でも構わない。即ち、位置調整部材は、下側ボディ部５１ｂ及び上側ボディ部５２ｂの一方に螺合され且つその先端が他方に当接するネジ部材５３により構成することができる。かかる構成によれば、ネジ部材５３の回転操作に応じて、下側ボディ部５１ｂと上側ボディ部５２ｂとが相対的に水平移動するので、後述するようにして免震支承１の捩れを精度良く調整できる。   The screw member 53 is screwed to the lower body portion 51b and its tip is in contact with the upper body portion 52b, and these positional relationships may be reversed. That is, the position adjusting member can be constituted by the screw member 53 which is screwed into one of the lower body portion 51b and the upper body portion 52b, and whose tip abuts on the other. According to such a configuration, the lower body portion 51b and the upper body portion 52b relatively move horizontally in accordance with the rotation operation of the screw member 53, so that the torsion of the seismic isolation bearing 1 can be accurately performed as described later. Can be adjusted.

本実施形態では、上側ボディ部５２ｂに対して互いに逆向きから先端を当接させる一対のネジ部材５３が設けられている。このため、図３の左右方向の何れに対しても、下側部材５１と上側部材５２とを相対的に水平移動させることができる。また、上下方向に延びた当接面５２ｅにネジ部材５３の先端を当接させているので、公差などにより免震支承１の高さ寸法にバラツキがある場合でも、下側部材５１と上側部材５２との間隔を変えることで対応できる。   In the present embodiment, a pair of screw members 53 are provided, the ends of which abut against the upper body portion 52b from opposite directions. Therefore, the lower member 51 and the upper member 52 can be relatively horizontally moved in any of the left and right directions in FIG. Further, since the distal end of the screw member 53 is in contact with the contact surface 52e extending in the vertical direction, even if the height of the seismic isolation bearing 1 varies due to tolerance or the like, the lower member 51 and the upper member This can be dealt with by changing the distance from the position 52.

捩れ調整器具５を取り付けた後、平行で逆向きの一対の力Ｆ１，Ｆ２が上側フランジ１３に作用するように、下側部材５１と上側部材５２とを相対的に水平移動させ（図３（ａ）参照）、それに伴う下側フランジ１２と上側フランジ１３との相対回転により免震支承１の捩れを調整する。この相対回転は、下側フランジ１２に対する上側フランジ１３の相対的なＲ１方向の回転となる。これにより、上側フランジ１３と建物躯体３との間での軸周り方向におけるボルト孔の位置ずれを矯正できる。この場合、少なくとも上側フランジ１３は、まだ構造物に固定されていない状態にある。   After the torsion adjusting device 5 is attached, the lower member 51 and the upper member 52 are relatively horizontally moved so that a pair of parallel and opposite forces F1 and F2 act on the upper flange 13 (FIG. 3 ( a)), the torsion of the seismic isolation bearing 1 is adjusted by the relative rotation of the lower flange 12 and the upper flange 13. This relative rotation is rotation of the upper flange 13 relative to the lower flange 12 in the R1 direction. Thereby, the displacement of the bolt hole in the direction around the axis between the upper flange 13 and the building frame 3 can be corrected. In this case, at least the upper flange 13 is not yet fixed to the structure.

下側フランジ１２と上側フランジ１３との相対回転の大きさ（回転角）は、ボルト孔の位置ずれの大きさに対応するため、通常は僅かで済む。また、ボルト孔の位置ずれが逆向きの場合には、平行で逆向きの一対の力Ｆ３，Ｆ４が上側フランジ１３に作用するように、下側部材５１と上側部材５２とを相対的に水平移動させ、それに伴う下側フランジ１２と上側フランジ１３との相対回転により免震支承１の捩れを調整すればよい。この相対回転は、下側フランジ１２に対する上側フランジ１３の相対的なＲ２方向の回転となる。   The magnitude of the relative rotation (rotation angle) between the lower flange 12 and the upper flange 13 corresponds to the magnitude of the displacement of the bolt hole, and is usually small. When the displacement of the bolt holes is opposite, the lower member 51 and the upper member 52 are relatively horizontally moved so that a pair of parallel and opposite forces F3 and F4 act on the upper flange 13. The torsion of the seismic isolation bearing 1 may be adjusted by moving the lower flange 12 and the upper flange 13 in accordance with the movement. This relative rotation is rotation of the upper flange 13 relative to the lower flange 12 in the R2 direction.

免震支承１の捩れを調整する工程の前に、下側フランジ１２のボルト孔１４にボルト１０を取り付けて建物基礎２に固定しておき（図３（ｂ）参照）、上述した一対の力Ｆ１，Ｆ２（またはＦ３，Ｆ４）を、下側フランジ１２及び上側フランジ１３の何れか固定されていない方、即ち上側フランジ１３に作用させることが好ましい。これによって、上側フランジ１３のボルト孔１４を建物躯体３のボルト孔に一致させやすくなり、それらの位置ずれをより簡便に矯正できる。   Before the process of adjusting the torsion of the seismic isolation bearing 1, the bolt 10 is attached to the bolt hole 14 of the lower flange 12 and fixed to the building foundation 2 (see FIG. 3B), and the pair of forces described above is used. It is preferable that F1, F2 (or F3, F4) act on one of the lower flange 12 and the upper flange 13 which is not fixed, that is, on the upper flange 13. Thereby, the bolt holes 14 of the upper flange 13 can be easily aligned with the bolt holes of the building frame 3, and their positional deviation can be corrected more easily.

本実施形態では、上側フランジ１３の複数のボルト孔１５に上側部材５２を係合させているので、水平移動時にボルト５２ｄに作用する剪断応力が抑制されるとともに、そのボルト５２ｄを中心とした上側部材５２の回転を防止できる。しかも、その複数のボルト孔１５同士を結ぶ直線と平行に上側部材５２を水平移動させることから、上側フランジ１３に力が伝達されやすい。下側フランジ１２の複数のボルト孔１５に下側部材５１を係合させている点についても、これと同じことが言える。   In the present embodiment, since the upper member 52 is engaged with the plurality of bolt holes 15 of the upper flange 13, the shear stress acting on the bolt 52d during horizontal movement is suppressed, and the upper The rotation of the member 52 can be prevented. Moreover, since the upper member 52 is horizontally moved in parallel with the straight line connecting the plurality of bolt holes 15, the force is easily transmitted to the upper flange 13. The same can be said for the point that the lower member 51 is engaged with the plurality of bolt holes 15 of the lower flange 12.

下側フランジ１２が建物基礎２に固定されていない状態であれば、上述した一対の力Ｆ１，Ｆ２（またはＦ３，Ｆ４）を下側フランジ１２に作用させてもよく、それによっても同様に免震支承１の捩れを調整できる。その場合には、免震支承１の捩れを調整する工程の前に、上側フランジ１３のボルト孔１４にボルトを取り付けて建物躯体３に固定しておくことが好ましい。あるいは、下側フランジ１２と上側フランジ１３のどちらも構造物に固定しない状態で、免震支承１の捩れを調整しても構わない。   If the lower flange 12 is not fixed to the building foundation 2, the above-mentioned pair of forces F1, F2 (or F3, F4) may be applied to the lower flange 12, thereby also exempting. The torsion of the seismic bearing 1 can be adjusted. In that case, it is preferable that a bolt is attached to the bolt hole 14 of the upper flange 13 and fixed to the building frame 3 before the step of adjusting the twist of the seismic isolation bearing 1. Alternatively, the torsion of the seismic isolation bearing 1 may be adjusted in a state where neither the lower flange 12 nor the upper flange 13 is fixed to the structure.

ボルト孔の位置ずれが軸周り方向だけでなく、例えば図３の左右方向にも生じているときは、必要に応じて、上述した免震支承１の捩れの調整とともに、その左右方向における免震支承１の姿勢も調整する。その場合、平行で同じ向きの一対の力Ｆ１，Ｆ４（またはＦ２，Ｆ３）が下側フランジ１２または上側フランジ１３に作用するように下側部材５１と上側部材５２とを相対的に水平移動させ、それに伴う下側フランジ１２と上側フランジ１３との相対移動により免震支承１の姿勢を調整すればよい。   When the displacement of the bolt hole occurs not only in the direction around the axis but also in the left-right direction in FIG. 3, for example, the torsion of the seismic isolation bearing 1 described above is adjusted together with the seismic isolation Adjust the attitude of the bearing 1 as well. In this case, the lower member 51 and the upper member 52 are relatively horizontally moved so that a pair of parallel forces F1 and F4 (or F2 and F3) acting on the lower flange 12 or the upper flange 13 are moved. The posture of the seismic isolation bearing 1 may be adjusted by the relative movement of the lower flange 12 and the upper flange 13 accompanying the movement.

免震支承１の捩れを調整した後、未装着のボルト孔１４にボルトを取り付け、下側フランジ１２及び上側フランジ１３が、それぞれ建物基礎２及び建物躯体３に固定された状態にする。この時点ではボルト孔の位置ずれが矯正されているので、各ボルト孔１４に対してボルトを支障なく取り付けることができる。続いて、免震支承１から捩れ調整器具５を取り外すとともに、建物躯体３の荷重を免震支承１が受ける状態にしたうえでジャッキアップ装置を撤去し、免震支承１の設置作業を完了する。   After the torsion of the seismic isolation bearing 1 is adjusted, bolts are attached to the bolt holes 14 that are not mounted, and the lower flange 12 and the upper flange 13 are fixed to the building foundation 2 and the building frame 3, respectively. At this time, since the displacement of the bolt holes has been corrected, the bolts can be attached to the bolt holes 14 without any trouble. Subsequently, the torsion adjusting device 5 is removed from the seismic isolation bearing 1, and the jack-up device is removed after the seismic isolation bearing 1 receives the load of the building frame 3, thereby completing the installation work of the seismic isolation bearing 1. .

前述の実施形態では、免震支承を挟んで対向する二箇所にのみ捩れ調整器具を取り付けた例を示したが、そのような二箇所を含む三箇所以上に捩れ調整器具を取り付けても構わない。   In the above-described embodiment, the example in which the torsion adjusting device is attached only to two locations facing each other across the seismic isolation bearing is shown, but the torsion adjusting device may be attached to three or more locations including such two locations. .

前述の実施形態では、下側部材５１や上側部材５２の装着に関して、ネジ孔であるボルト孔１５を利用した例を示したが、これに限られない。例えば、ボルト孔１５に代えてまたは加えて、免震支承１を構造物に固定するためのボルト孔１４を利用してもよく、これによって捩れ調整器具５を取り付ける位置が制約されないという利点が得られる。   In the above-described embodiment, an example is described in which the lower member 51 and the upper member 52 are mounted using the bolt holes 15 as screw holes. However, the present invention is not limited to this. For example, instead of or in addition to the bolt hole 15, a bolt hole 14 for fixing the seismic isolation bearing 1 to the structure may be used, which has the advantage that the position at which the torsion adjusting device 5 is mounted is not restricted. Can be

本発明は上述した実施形態に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲内で種々の改良変更が可能である。   The present invention is not limited to the above-described embodiment at all, and various improvements and modifications can be made without departing from the spirit of the present invention.

１ 免震支承
２ 建物基礎（下部構造物の一例）
３ 建物躯体（上部構造物の一例）
４ 既設の免震支承
５ 捩れ調整器具
１２ 下側フランジ
１３ 上側フランジ
１４ ボルト孔
１５ ボルト孔
５１ 下側部材
５１ａ 下側ベース部
５１ｂ 下側ボディ部
５２ 上側部材
５２ａ 上側ベース部
５２ｂ 上側ボディ部
５３ ネジ部材（位置調整部材に相当） 1 Seismic isolation bearing 2 Building foundation (example of substructure)
3 Building frame (example of superstructure)
4 Existing seismic isolation bearing 5 Torsion adjustment device 12 Lower flange 13 Upper flange 14 Bolt hole 15 Bolt hole 51 Lower member 51a Lower base portion 51b Lower body portion 52 Upper member 52a Upper base portion 52b Upper body portion 53 Screw Members (corresponding to position adjustment members)

Claims (4)

下部構造物と上部構造物との間隙に免震支承を配置する工程と、
前記免震支承の下側フランジに装着される下側部材と、前記免震支承の上側フランジに装着される上側部材とを備え、それらが相対的に水平移動自在に組み合わされた捩れ調整器具を、前記免震支承を挟んで対向する二箇所に取り付ける工程と、
平行で逆向きの一対の力が前記下側フランジまたは前記上側フランジに作用するように前記下側部材と前記上側部材とを相対的に水平移動させ、それに伴う前記下側フランジと前記上側フランジとの相対回転により前記免震支承の捩れを調整する工程と、
前記下側フランジ及び前記上側フランジが、それぞれ前記下部構造物及び前記上部構造物に固定された状態にする工程と、を備える免震支承の設置方法。 Placing a seismic isolation bearing in the gap between the lower structure and the upper structure;
A torsion adjusting device comprising: a lower member attached to a lower flange of the seismic isolation bearing; and an upper member attached to an upper flange of the seismic isolation bearing. Mounting at two locations facing each other across the seismic isolation bearing;
The lower member and the upper member are relatively horizontally moved so that a pair of parallel and opposite forces acts on the lower flange or the upper flange, and the lower flange and the upper flange associated therewith. Adjusting the torsion of the seismic isolation bearing by relative rotation of
Setting the lower flange and the upper flange to be fixed to the lower structure and the upper structure, respectively. 前記免震支承の捩れを調整する工程の前に、前記下側フランジを前記下部構造物に固定し、または前記上側フランジを前記上部構造物に固定しておき、
前記免震支承の捩れを調整する工程では、前記下側フランジ及び前記上側フランジの何れか固定されていない方に前記一対の力を作用させる請求項１に記載の免震支承の設置方法。 Before the step of adjusting the torsion of the seismic isolation bearing, the lower flange is fixed to the lower structure, or the upper flange is fixed to the upper structure,
2. The method of claim 1, wherein in the step of adjusting the torsion of the seismic isolation bearing, the pair of forces is applied to one of the lower flange and the upper flange that is not fixed. 3. 前記下側フランジの複数のボルト孔に前記下側部材を係合させ、前記上側フランジの複数のボルト孔に前記上側部材を係合させることにより、前記捩れ調整器具を前記免震支承に取り付ける請求項１または２に記載の免震支承の設置方法。   The torsion adjusting device is attached to the seismic isolation bearing by engaging the lower member with a plurality of bolt holes of the lower flange and engaging the upper member with a plurality of bolt holes of the upper flange. Item 1. The method for installing a seismic isolation bearing according to item 1 or 2. 下部構造物と上部構造物との間隙に設置される免震支承の下側フランジに装着される下側部材と、前記免震支承の上側フランジに装着される上側部材とを備え、
前記下側部材が、前記下側フランジの上面に接合される下側ベース部と、前記下側ベース部の上方に設けられた下側ボディ部とを有し、
前記上側部材が、前記上側フランジの下面に接合される上側ベース部と、前記上側ベース部の下方に設けられた上側ボディ部とを有し、
前記下側ボディ部と前記上側ボディ部との間に、それらの相対的な水平移動を操作可能な位置調整部材が取り付けられ、
前記位置調整部材が、前記下側ボディ部及び前記上側ボディ部の一方に螺合され且つその先端が他方に当接するネジ部材により構成されている捩れ調整器具。 A lower member attached to a lower flange of a seismic isolation bearing installed in a gap between a lower structure and an upper structure, and an upper member attached to an upper flange of the seismic isolation bearing,
The lower member has a lower base portion joined to an upper surface of the lower flange, and a lower body portion provided above the lower base portion,
The upper member has an upper base portion joined to a lower surface of the upper flange, and an upper body portion provided below the upper base portion,
Between the lower body portion and the upper body portion, a position adjustment member capable of operating relative horizontal movement thereof is attached,
A torsion adjusting device , wherein the position adjusting member is a screw member screwed into one of the lower body portion and the upper body portion and having a tip abutting on the other .
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