JP4661573B2 - Installation method of elastic bearings for structures - Google Patents

Installation method of elastic bearings for structures Download PDF

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JP4661573B2
JP4661573B2 JP2005358325A JP2005358325A JP4661573B2 JP 4661573 B2 JP4661573 B2 JP 4661573B2 JP 2005358325 A JP2005358325 A JP 2005358325A JP 2005358325 A JP2005358325 A JP 2005358325A JP 4661573 B2 JP4661573 B2 JP 4661573B2
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plate
upper plate
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upper structure
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JP2007162280A (en
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英和 佐藤
明雄 鈴木
勇 竹ノ内
宮崎　　貞義
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Oiles Corp
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Description

本発明は、構造物用弾性支承体を介してコンクリート製の橋梁桁その他のコンクリート構造物を橋脚等の下部構造物に架設する場合に、コンクリート構造物のプレストレスによる弾性収縮、クリープ乾燥収縮を吸収して構造物用弾性支承体の剪断変形を著しく小さくし得る構造物用弾性支承体の据付方法に関する。   In the present invention, when a concrete bridge girder or other concrete structure is erected on a lower structure such as a bridge pier through an elastic support for a structure, elastic shrinkage and creep drying shrinkage due to prestressing of the concrete structure are performed. The present invention relates to a method for installing an elastic support for a structure that can absorb and significantly reduce the shear deformation of the elastic support for a structure.

特開平６−１７３２２０号公報JP-A-6-173220

例えば特許文献１においては、弾性支承体の下プレートを下部構造物に仮固定して、弾性支承体の上プレート上にコンクリート製の上部構造物を構築し、次に上部構造物に水平方向のプレストレスを導入し、このプレストレスの導入から一定期間放置し、その後、下プレートと下部構造物との仮固定を解除して、上部構造物のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量に基づく弾性支承体の上プレート及び下プレート間に介在されたゴム支承体の水平方向の剪断変形を除去する量に加えて、更にプレストレス導入後のクリープ乾燥収縮量から予測した残余のクリープ乾燥収縮量に基づく量に基づくゴム支承体の前記水平方向の剪断変形を補償する量だけ、下プレートを水平方向に移動させ、この移動後下プレートを下部構造物に固定する構造物用弾性支承体の据付方法が提案されている。   For example, in Patent Document 1, a lower plate of an elastic support is temporarily fixed to a lower structure, a concrete upper structure is constructed on the upper plate of the elastic support, and then the horizontal structure is placed on the upper structure. Prestress is introduced and left for a certain period from the introduction of this prestress. After that, the temporary fixation between the lower plate and the lower structure is released, and the amount of elastic contraction due to the prestress of the upper structure and after the prestress is introduced. In addition to the amount to eliminate the horizontal shear deformation of the rubber bearing interposed between the upper and lower plates of the elastic bearing based on the creep drying shrinkage amount, it was also predicted from the creep drying shrinkage amount after prestressing The lower plate is moved in the horizontal direction by an amount that compensates for the horizontal shear deformation of the rubber base based on the amount based on the amount of residual creep drying shrinkage. Installation method of construction for the elastic support member for fixing the over preparative the lower structure has been proposed.

ところで、斯かる構造物用弾性支承体の据付方法では、コンクリート製の上部構造物が長大である場合には、上部構造物に生じるプレストレスによる弾性収縮量及びクリープ乾燥収縮量が大きくなってしまうために、下プレートの下部構造物に対する移動量が増大することとなり、この増大に応じて下部構造物の寸法を力学的に不必要であるにも拘わらずより大きくする必要があることから、構造物の設計に手間を要することとなると共に、構造物の材料費等も増加する虞がある。   By the way, in such a method for installing an elastic support for a structure, when the concrete upper structure is long, the amount of elastic shrinkage and creep drying shrinkage due to prestress generated in the upper structure are increased. Therefore, the amount of movement of the lower plate relative to the lower structure is increased, and the size of the lower structure needs to be increased in accordance with this increase, although it is not necessary mechanically. In addition to the time and effort required to design the object, the material cost of the structure may increase.

また、斯かる構造物用弾性支承体の据付方法では、下プレートを下部構造物に対して水平方向に移動させるために、下部構造物の施工後に、上部構造物の設計の修正、変更等により寸法を更に大きくする場合には、ゴム支承体の下部構造物に対する最大移動量が下部構造物の寸法に制限される結果、最終的な据付後のゴム支承体の剪断変形量をなくすことが困難であり、また、剪断変形が残存したゴム支承体を使用する場合には、安全性を担保すべく、より大きなゴム支承体を選択することとなることから、構造物の低廉化を図り難い。   In addition, in such an installation method of the elastic support body for a structure, in order to move the lower plate in the horizontal direction with respect to the lower structure, the construction of the upper structure is modified or changed after the construction of the lower structure. When the dimensions are further increased, it is difficult to eliminate the amount of shear deformation of the rubber bearing after final installation as a result of the maximum movement of the rubber bearing relative to the lower structure being limited by the dimensions of the lower structure. In addition, when a rubber bearing body in which shear deformation remains is used, a larger rubber bearing body is selected in order to ensure safety, so that it is difficult to reduce the cost of the structure.

加えて、斯かる構造物用弾性支承体の据付方法では、下プレートを下部構造物に対して水平方向に移動させるために、実際の施工現場においては前記移動に用いる工具等を下部構造物上に載置したりするところ、下部構造物上の工具等の載置領域が狭められる結果、弾性支承体の据付に関する作業容易性の維持、向上を図り難い。   In addition, in such an installation method of the elastic support for a structure, in order to move the lower plate in the horizontal direction with respect to the lower structure, a tool or the like used for the movement is placed on the lower structure at an actual construction site. However, as a result of narrowing the mounting area of the tool or the like on the lower structure, it is difficult to maintain and improve the workability related to the installation of the elastic support.

本発明は、前記諸点に鑑みてなされたものであり、その目的とするところは、最終的な据付後のゴム支承体の剪断変形量を可能な限り小さくし得ると共に過度に大きな下部構造物を必要とせずに下部構造物を最適に設計することができ、構造物の低廉化を図り得、しかも、弾性支承体の据付に関する作業容易性の維持、向上をも図り得る構造物用弾性支承体の据付方法を提供することにある。   The present invention has been made in view of the above-mentioned points, and an object of the present invention is to reduce the amount of shear deformation of the rubber bearing body after final installation as much as possible and to provide an excessively large substructure. An elastic support for a structure that can optimally design a substructure without the need for it, can reduce the cost of the structure, and can also maintain and improve the workability of installing the elastic support It is to provide an installation method.

本発明の構造物用弾性支承体の据付方法は、ゴム支承体、ゴム支承体の上面に取り付けられた上プレート及びゴム支承体の下面に取り付けられた下プレートを具備した弾性支承体の下プレートを下部構造物に固定し、上プレートを上部構造物の下面に仮固定し、この仮固定から一定期間経過した後に、上プレートの上部構造物への仮固定を解除し、ゴム支承体の剪断変形を除去するための移動量をもって上プレートを上部構造物に対して水平方向に移動させ、この移動後に上プレートを上部構造物の下面に固定する。   The method of installing an elastic bearing body for a structure according to the present invention includes a rubber bearing body, an upper plate attached to the upper surface of the rubber bearing body, and a lower plate attached to the lower surface of the rubber bearing body. Is fixed to the lower structure, and the upper plate is temporarily fixed to the lower surface of the upper structure. After a certain period of time has elapsed since the temporary fixing, the upper plate is temporarily fixed to the upper structure and the rubber bearing is sheared. The upper plate is moved in the horizontal direction with respect to the upper structure with a movement amount for removing the deformation, and after this movement, the upper plate is fixed to the lower surface of the upper structure.

本発明の構造物用弾性支承体の据付方法によれば、特に、上プレートを上部構造物に対して水平方向に移動させるために、下部構造物の寸法に制限されることなく上プレートを水平方向に移動させることができて、構造物の完成時にゴム支承体の剪断変形量を可能な限り小さくし得て弾性支承体をほぼ直立状態にすることができ、斯かる弾性支承体により地震等の振動に対する所望の性能を発揮し得る構造物を構築することができ、力学的に必要とされる寸法のゴム支承体よりも大きなゴム支承体を選択する必要も低減させることができ、また、下プレートの下部構造物に対する水平方向の移動量を考慮することなく下部構造物を最適に設計することができると共に構造物（特に下部構造物）の材料費等の増加を防止することができ、しかも、下プレートを下部構造物に対して水平方向に移動させるための領域が不要となることから下部構造物上の工具等の載置領域を確保することができ、而して、最終的な据付後のゴム支承体の剪断変形量を可能な限り小さくし得ると共に過度に大きな下部構造物を必要とせずに下部構造物を最適に設計することができ、構造物の低廉化を図り得、しかも、弾性支承体の据付に関する作業容易性の維持、向上をも図り得る。   According to the method of installing the elastic support for a structure of the present invention, in particular, in order to move the upper plate in the horizontal direction with respect to the upper structure, the upper plate is not restricted by the size of the lower structure. It can be moved in the direction, and when the structure is completed, the amount of shear deformation of the rubber bearing body can be made as small as possible to make the elastic bearing body almost upright. It is possible to construct a structure capable of exhibiting a desired performance against vibrations of the motor, and to reduce the need to select a rubber bearing body larger than a rubber bearing body having a mechanically required size. The lower structure can be optimally designed without considering the amount of horizontal movement of the lower plate relative to the lower structure, and an increase in the material cost of the structure (particularly the lower structure) can be prevented. Moreover Since there is no need to move the lower plate in the horizontal direction with respect to the lower structure, it is possible to secure a mounting area for tools and the like on the lower structure. The amount of shear deformation of the rubber bearing body can be made as small as possible, and the lower structure can be optimally designed without requiring an excessively large lower structure, and the cost of the structure can be reduced. It is also possible to maintain and improve the workability related to the installation of the elastic support.

また、本発明の構造物用弾性支承体の据付方法によれば、特に、上プレートを上部構造物に対して水平方向に移動させるために、上プレートと上部構造物との間に雨水、塵埃等が入り込む虞を軽減して上プレートと上部構造物との摺動摩擦抵抗が増大する虞を低減させることができ、上プレートを上部構造物の下面に仮固定、固定するために、上プレートが上部構造物の直下に配置されることから、上プレート及び／又は摺接プレートに、摺動摩擦抵抗を低減するため施された摺動材料、例えば四フッ化エチレン樹脂の直射日光等による温度上昇に基づく早期の劣化を防止することができ、しかも、例えば上プレートと上部構造物との仮固定にボルトを用いる場合には、斯かるボルトが挿通され、螺合されるボルト穴（孔）への雨水の浸入等による腐食や塵埃等の付着が生じる虞を軽減させることができ、而して、上プレートの仮固定の解除や上プレートの上部構造物に対する水平方向の移動を容易に行い得る。   In addition, according to the method of installing the elastic support for a structure of the present invention, in particular, in order to move the upper plate in the horizontal direction with respect to the upper structure, rainwater and dust are placed between the upper plate and the upper structure. Etc. can be reduced to reduce the possibility of increased sliding frictional resistance between the upper plate and the upper structure, and the upper plate is temporarily fixed and fixed to the lower surface of the upper structure. Since it is arranged directly under the superstructure, the sliding material applied to the upper plate and / or the sliding contact plate to reduce sliding frictional resistance, for example, due to direct sunlight of tetrafluoroethylene resin, etc. For example, when a bolt is used for temporarily fixing the upper plate and the upper structure, the bolt is inserted into and screwed into a bolt hole (hole). Rainwater intrusion, etc. According can reduce the possibility that adhesion may occur, such as corrosion, dust, and Thus, capable of performing movement in the horizontal direction with respect to the superstructure of the temporary fixing of the release and the upper plate of the upper plate easily.

加えて、本発明の構造物用弾性支承体の据付方法によれば、特に、上プレートを上部構造物に固定するために、弾性支承体の下部構造物に対する位置ずれを生じさせることがなく、斯かる位置ずれ及び上部構造物の荷重に基づく想定外のモーメントを下部構造物に作用させる虞をなくし得る。   In addition, according to the method for installing the elastic support for a structure of the present invention, in particular, in order to fix the upper plate to the upper structure, the elastic support does not cause a positional shift with respect to the lower structure, It is possible to eliminate the possibility that an unexpected moment based on such positional deviation and the load on the upper structure is applied to the lower structure.

本発明の他の構造物用弾性支承体の据付方法は、ゴム支承体、ゴム支承体の上面に取り付けられた上プレート及びゴム支承体の下面に取り付けられた下プレートを具備した弾性支承体の下プレートを下部構造物に固定し、上プレートをコンクリート製の上部構造物の下面に仮固定し、上部構造物にプレストレスを導入し、このプレストレスの導入から一定期間経過した後に、上プレートの上部構造物への仮固定を解除し、上部構造物のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量に基づくゴム支承体の水平方向の剪断変形を除去するための移動量をもって上プレートを上部構造物に対して水平方向に移動させ、この移動後に上プレートを上部構造物の下面に固定する。このような他の構造物用弾性支承体の据付方法によっても、上記同様の効果を奏し得る。   Another method of installing an elastic bearing body for a structure according to the present invention includes a rubber bearing body, an upper plate attached to the upper surface of the rubber bearing body, and a lower plate attached to the lower surface of the rubber bearing body. The lower plate is fixed to the lower structure, the upper plate is temporarily fixed to the lower surface of the concrete upper structure, prestress is introduced into the upper structure, and after a certain period of time has passed since the introduction of this prestress, the upper plate The amount of movement to remove the horizontal shear deformation of the rubber bearing based on the amount of elastic shrinkage due to prestress of the upper structure and the amount of creep drying shrinkage after the prestress is introduced The upper plate is moved horizontally with respect to the upper structure, and after this movement, the upper plate is fixed to the lower surface of the upper structure. The same effects as described above can also be achieved by such other methods of installing the elastic support for a structure.

本発明の他の構造物用弾性支承体の据付方法の好ましい例では、上部構造物のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量に基づくゴム支承体の水平方向の剪断変形を除去するための移動量に加えて、更にプレストレス導入後のクリープ乾燥収縮量から予測した残余のクリープ乾燥収縮量に基づくゴム支承体の水平方向の剪断変形を補償するための移動量をもって、上プレートを上部構造物に対して水平方向に移動させ、この移動後に上プレートを上部構造物の下面に固定する。このような好ましい例によれば、特に剪断変形を補償するための移動量をもって、上プレートを上部構造物に対して水平方向に移動させるために、上部構造物の実際の収縮量がその組成、温度等により種々ばらついても、それに対応して最終的な据付後のゴム支承体の剪断変形量を可能な限り小さくし得る。   In a preferred example of the installation method of the elastic bearing body for other structures of the present invention, the horizontal shear deformation of the rubber bearing body based on the amount of elastic shrinkage due to the prestress of the upper structure and the amount of creep drying shrinkage after the prestress is introduced. In addition to the amount of movement to remove, the amount of movement to compensate for the horizontal shear deformation of the rubber base based on the amount of creep drying shrinkage remaining estimated from the amount of creep drying shrinkage after introduction of prestress, The upper plate is moved in the horizontal direction with respect to the upper structure, and after this movement, the upper plate is fixed to the lower surface of the upper structure. According to such a preferred example, in order to move the upper plate in a horizontal direction with respect to the upper structure, particularly with a movement amount to compensate for shear deformation, the actual shrinkage amount of the upper structure has its composition, Even if there are various variations due to temperature or the like, the amount of shear deformation of the rubber support after the final installation can be made as small as possible.

本発明の構造物用弾性支承体の据付方法の好ましい例では、上プレートを所定期間毎に水平方向に移動させてもよく、上プレートを水平方向に複数回移動させてもよい。このような好ましい例によれば、ゴム支承体に過度なストレスを与えることなく、より長い水平方向の移動が可能となる。   In a preferable example of the method for installing the elastic support for a structure of the present invention, the upper plate may be moved in the horizontal direction every predetermined period, or the upper plate may be moved in the horizontal direction a plurality of times. According to such a preferable example, a longer horizontal movement is possible without applying excessive stress to the rubber bearing.

本発明によれば、最終的な据付後のゴム支承体の剪断変形量を可能な限り小さくし得ると共に過度に大きな下部構造物を必要とせずに下部構造物を最適に設計することができ、構造物の低廉化を図り得、しかも、弾性支承体の据付に関する作業容易性の維持、向上をも図り得る構造物用弾性支承体の据付方法を提供し得る。   According to the present invention, the amount of shear deformation of the rubber bearing after the final installation can be reduced as much as possible, and the lower structure can be optimally designed without requiring an excessively large lower structure, It is possible to provide a method for installing an elastic support body for a structure which can reduce the cost of the structure and can also maintain and improve workability related to the installation of the elastic support body.

次に、本発明の実施の形態の例を、図に示す例に基づいて更に詳細に説明する。尚、本発明はこれら例に何等限定されないのである。   Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

図１から図９において、本例の構造物用弾性支承体（以下、「弾性支承体」と称する）１は、ゴム支承体２と、ゴム支承体２の上面３に取り付けられた上プレート５と、ゴム支承体２の下面４に取り付けられた下プレート６とを具備している。   1 to 9, an elastic bearing body for a structure (hereinafter referred to as “elastic bearing body”) 1 of this example includes a rubber bearing body 2 and an upper plate 5 attached to the upper surface 3 of the rubber bearing body 2. And a lower plate 6 attached to the lower surface 4 of the rubber bearing body 2.

弾性支承体１が据付けられる橋梁等の構造物１５は、コンクリート製の橋桁等の上部構造物７とコンクリート製の橋脚、橋台等の下部構造物９との間に弾性支承体１が介在されてなる。   A structure 15 such as a bridge on which the elastic support body 1 is installed has an elastic support body 1 interposed between an upper structure 7 such as a concrete bridge girder and a lower structure 9 such as a concrete bridge pier or an abutment. Become.

下部構造物９の上面１０には、下プレート６が固定用のボルト２２により固定されるベースプレート２７が設置されている。ベースプレート２７には、鉛直方向に伸びた鋼製のアンカーボルト２３が固定されている。アンカーボルト２３は、下部構造物９に埋め込まれることで当該下部構造物９に固定される。   A base plate 27 to which the lower plate 6 is fixed by fixing bolts 22 is installed on the upper surface 10 of the lower structure 9. A steel anchor bolt 23 extending in the vertical direction is fixed to the base plate 27. The anchor bolt 23 is fixed to the lower structure 9 by being embedded in the lower structure 9.

上部構造物７の下面８には、上プレート５に摺動自在に接合する摺接プレート３３が設置されている。摺接プレート３３には、鉛直方向に伸びた鋼製のアンカーボルト３４が固定されている。アンカーボルト３４は、上部構造物７に埋め込まれることで当該上部構造物７に固定され、摺接プレート３３は、アンカーボルト３４によって上部構造物７に固定される。摺接プレート３３には、仮固定用兼固定用のボルト３５が螺合されるボルト穴４２が形成されている。ボルト穴４２は、予め形成されていてもよいが、上プレート５を仮固定、固定する際に形成されてもよい。摺接プレート３３には、上プレート５を上部構造物７に対して移動させる方向に案内する一対のガイドプレート３８が取り付けられている。一対のガイドプレート３８の対向側面３９には、四フッ化エチレン樹脂等が処理されており、当該側面３９において上プレート５に滑接する。   A slidable contact plate 33 slidably joined to the upper plate 5 is installed on the lower surface 8 of the upper structure 7. A steel anchor bolt 34 extending in the vertical direction is fixed to the sliding contact plate 33. The anchor bolt 34 is fixed to the upper structure 7 by being embedded in the upper structure 7, and the sliding contact plate 33 is fixed to the upper structure 7 by the anchor bolt 34. The sliding contact plate 33 is formed with a bolt hole 42 into which the temporarily fixing and fixing bolt 35 is screwed. The bolt holes 42 may be formed in advance, but may be formed when the upper plate 5 is temporarily fixed and fixed. A pair of guide plates 38 that guide the upper plate 5 in the direction in which the upper plate 5 is moved with respect to the upper structure 7 are attached to the sliding contact plate 33. The opposite side surfaces 39 of the pair of guide plates 38 are treated with a tetrafluoroethylene resin or the like, and are in sliding contact with the upper plate 5 on the side surfaces 39.

ゴム支承体２は、ゴム弾性体１１と、ゴム弾性体１１内に積層状に埋め込まれた複数枚の薄肉補強板１２と、最上位の薄肉補強板１２よりも上方に配されてゴム弾性体１１の上部１８に埋め込まれた上部厚肉補強板１３と、最下位の薄肉補強板１２よりも下方に配されてゴム弾性体１１の下部１９に埋め込まれた下部厚肉補強板１４とを具備している。ゴム支承体２は、弾性支承体１の据付後においては、上部構造物７と下部構造物９との地震等に基づく相対変位により主に水平方向に関して剪断変形を生じる。   The rubber support body 2 is disposed above the rubber elastic body 11, the plurality of thin reinforcing plates 12 embedded in the rubber elastic body 11 in a stacked manner, and the uppermost thin reinforcing plate 12. 11, and an upper thick reinforcing plate 13 embedded in the upper portion 18 of the rubber 11 and a lower thick reinforcing plate 14 disposed below the lowermost thin reinforcing plate 12 and embedded in the lower portion 19 of the rubber elastic body 11. is doing. After the elastic bearing body 1 is installed, the rubber bearing body 2 undergoes shear deformation mainly in the horizontal direction due to relative displacement caused by an earthquake between the upper structure 7 and the lower structure 9.

下プレート６は、取付用のボルト（図示せず）により下部厚肉補強板１４に取り付けられている。下プレート６及び下部厚肉補強板１４には凹所が夫々形成されており、当該凹所には下プレート６とゴム支承体２とを係合させる係合駒２５が配されている。係合駒２５は、前記係合により下プレート６のゴム支承体２に対する水平方向に関する滑りを防止している。下プレート６は、固定用のボルト２２によりベースプレート２７に固定されるが、ベースプレート２７に溶接されてもよい。   The lower plate 6 is attached to the lower thick reinforcing plate 14 with mounting bolts (not shown). A recess is formed in each of the lower plate 6 and the lower thick reinforcing plate 14, and an engagement piece 25 for engaging the lower plate 6 and the rubber support 2 is disposed in the recess. The engaging piece 25 prevents the lower plate 6 from slipping in the horizontal direction with respect to the rubber bearing body 2 by the engagement. The lower plate 6 is fixed to the base plate 27 by fixing bolts 22, but may be welded to the base plate 27.

上プレート５は、取付用のボルト（図示せず）により上部厚肉補強板１３に取り付けられている。上プレート５及び下部厚肉補強板１３には凹所が夫々形成されており、当該凹所には上プレート５とゴム支承体２とを係合させる係合駒３７が配されている。係合駒３７は、前記係合により上プレート５のゴム支承体２に対する水平方向に関する滑りを防止している。上プレート５は、摺接プレート３３に仮固定兼固定用のボルト３５によって仮固定、固定されることで、摺接プレート３３を介して上部構造物７の下面８に仮固定、固定される。   The upper plate 5 is attached to the upper thick reinforcing plate 13 by mounting bolts (not shown). A recess is formed in each of the upper plate 5 and the lower thick reinforcing plate 13, and an engaging piece 37 for engaging the upper plate 5 and the rubber support 2 is disposed in the recess. The engaging piece 37 prevents the upper plate 5 from slipping in the horizontal direction with respect to the rubber bearing 2 by the engagement. The upper plate 5 is temporarily fixed and fixed to the lower surface 8 of the upper structure 7 via the sliding contact plate 33 by being temporarily fixed and fixed to the sliding contact plate 33 by the bolts 35 for temporarily fixing and fixing.

上プレート５には、ボルト３５が挿通される複数のボルト孔４１が形成されている。複数のボルト孔４１は、上プレート５の上部構造物７に対する水平方向の移動を所定期間毎に複数回行う場合には、各一回分の移動量に対応する間隔をもって前記移動させる方向に並んで夫々配置される。複数のボルト孔４１は、前記移動させる方向に伸びた長孔であってもよい。ボルト孔４１は、予め形成されていてもよいが、上プレート５を仮固定、固定する際に形成されてもよい。   The upper plate 5 is formed with a plurality of bolt holes 41 through which the bolts 35 are inserted. When the horizontal movement of the upper plate 5 with respect to the upper structure 7 is performed a plurality of times for each predetermined period, the plurality of bolt holes 41 are arranged in the moving direction with an interval corresponding to each movement amount. Each is arranged. The plurality of bolt holes 41 may be long holes extending in the moving direction. The bolt holes 41 may be formed in advance, but may be formed when the upper plate 5 is temporarily fixed and fixed.

以上の弾性支承体１は、下部構造物９上で上部構造物７を支持し、地震時に上部構造物７と下部構造物９との間に生じる水平変位、傾き等の相対変位を剪断変形によって許容する。   The elastic support body 1 supports the upper structure 7 on the lower structure 9, and the relative displacement such as horizontal displacement and inclination generated between the upper structure 7 and the lower structure 9 at the time of an earthquake is caused by shear deformation. Allow.

以下、本例の弾性支承体１の据付方法について詳細に説明する。ここで、上部構造物７はコンクリート製の橋桁からなるものとし、下部構造物８はコンクリート製の橋脚又は橋台からなるものとする。尚、上プレート５の上面４４及び／又は摺接プレート３３の下面４５には、上プレート５と摺接プレート３３との摺動摩擦抵抗が低減されるように、四フッ化エチレン樹脂、モリブデン等を塗布、焼き付け等の処理を施しておいてもよい。   Hereinafter, the installation method of the elastic support body 1 of this example is demonstrated in detail. Here, the upper structure 7 shall consist of a concrete bridge girder, and the lower structure 8 shall consist of a concrete pier or an abutment. The upper surface 44 of the upper plate 5 and / or the lower surface 45 of the sliding contact plate 33 are made of tetrafluoroethylene resin, molybdenum or the like so that the sliding frictional resistance between the upper plate 5 and the sliding contact plate 33 is reduced. Processing such as coating and baking may be performed.

まず、図１に示すように、ゴム支承体２が剪断変形していないほぼ直立状態にある弾性支承体１の下プレート６をボルト２２によりベースプレート２７に固定し、これにより下プレート６を下部構造物９の上面１０に固定する一方、上プレート５をボルト３５により摺接プレート３３に仮固定し、これにより上プレート５を上部構造物７の下面８に仮固定する。ここで、上プレート５の仮固定の際の摺接プレート３３に対する位置は、上部構造物７のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量を考慮して、上部構造物７に取り付けられた摺接プレート３３の中央位置よりも水平方向、ここでは橋軸方向Ｘであって上部構造物７が収縮する方向Ａ側に偏心させておく。   First, as shown in FIG. 1, the lower plate 6 of the elastic bearing body 1 in an almost upright state in which the rubber bearing body 2 is not shear-deformed is fixed to the base plate 27 with bolts 22, whereby the lower plate 6 is fixed to the lower structure. While fixing to the upper surface 10 of the object 9, the upper plate 5 is temporarily fixed to the sliding contact plate 33 with the bolt 35, and thereby the upper plate 5 is temporarily fixed to the lower surface 8 of the upper structure 7. Here, the position of the upper plate 5 with respect to the sliding contact plate 33 when temporarily fixed is determined in consideration of the amount of elastic shrinkage due to the prestress of the upper structure 7 and the amount of creep drying shrinkage after the prestress is introduced. It is decentered in the horizontal direction from the central position of the sliding contact plate 33 attached to the side, here the bridge axis direction X and the direction A in which the upper structure 7 contracts.

次に、上部構造物７に橋軸方向Ｘのプレストレスを導入し、一定期間放置する。プレストレスの導入により、ゴム支承体２は、図３に示すように橋軸方向Ｘに関して剪断変形される。プレストレスの導入後、上部構造物７はクリープ乾燥により更に収縮され、当該収縮によりゴム支承体２の剪断変形量も増加する。上部構造物７のクリープ乾燥収縮量は、定期的に測定、記録する。前記一定期間は、ゴム支承体２が安全に鉛直荷重を支持することができる範囲の剪断変形量を超えない程度の期間内において予め設定された期間である。   Next, prestress in the bridge axis direction X is introduced into the upper structure 7 and left for a certain period. By introducing the prestress, the rubber bearing 2 is sheared and deformed with respect to the bridge axis direction X as shown in FIG. After the introduction of the prestress, the upper structure 7 is further contracted by creep drying, and the shear deformation amount of the rubber support 2 is also increased by the contraction. The creep dry shrinkage of the superstructure 7 is measured and recorded periodically. The predetermined period is a period set in advance within a period that does not exceed the amount of shear deformation in a range in which the rubber support 2 can safely support the vertical load.

プレストレス導入から一定期間経過した後、図４に示すように、油圧ジャッキ４８をボルト５３により摺接プレート３３の方向Ａ側の部位に取り付けると共に油圧ジャッキ４８の伸縮ロッド５４の先端を上プレート５に取り付け、この油圧ジャッキ４８の作動により上プレート５に方向Ａに向かう引張力を与えてボルト３５に加えられている剪断力を除去し、その後、ボルト３５を摺接プレート３３及び上プレート５から取り外し、而して、上プレート５の摺接プレート３３への仮固定を解除する。仮固定の解除後、油圧ジャッキ４８は摺接プレート３３から取り外される。   After a certain period of time has elapsed since the introduction of the prestress, as shown in FIG. 4, the hydraulic jack 48 is attached to the portion on the direction A side of the sliding contact plate 33 with the bolt 53 and the tip of the telescopic rod 54 of the hydraulic jack 48 is attached to the upper plate 5. The hydraulic jack 48 is operated to apply a tensile force in the direction A to the upper plate 5 to remove the shearing force applied to the bolt 35, and then the bolt 35 is removed from the sliding plate 33 and the upper plate 5. Then, the temporary fixing of the upper plate 5 to the sliding contact plate 33 is released. After the temporary fixing is released, the hydraulic jack 48 is removed from the sliding contact plate 33.

次に、図５に示すように、油圧ジャッキ４９（前記取り外した油圧ジャッキ４８を用いてもよい）をボルト５３により摺接プレート３３の後述の方向Ｂ側の部位に取り付けると共に油圧ジャッキ４９の伸縮ロッド５４の先端を上プレート５に取り付け、この油圧ジャッキ４９の作動により上プレート５に方向Ａとは反対の方向Ｂに向かう引張力を与えて当該上プレート５を摺接プレート３３に対して方向Ｂに移動させる。ここで、上プレート５は、上部構造物７のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量に基づくゴム支承体２の橋軸方向Ｘの剪断変形を除去するための移動量に加えて、更に上記のように測定、記録したプレストレス導入後のクリープ乾燥収縮量から予測した残余のクリープ乾燥収縮量に基づくゴム支承体２の橋軸方向Ｘの剪断変形を補償する移動量をもって、方向Ｂに移動させる。上プレート５が前記移動量をもって方向Ｂに移動された弾性支承体１は、図６に示すように、剪断変形された状態となり、上プレート５は、摺接プレート３３の中央位置よりも方向Ｂ側に偏心された位置に配される。前記移動量をもって方向Ｂに移動されるべき上プレート５の位置決めは、摺接プレート３３にガイドプレート３８を介してボルト５５により着脱自在に取り付けられた位置決めプレート５１が、方向Ｂに移動される上プレート５に接触することによって行う。斯かる位置決めプレート５１を用いることにより上プレート５の位置決めを簡単に行い得る。位置決めプレート５１の寸法は、前記移動量に応じて適宜変更される。尚、残余のクリープ乾燥収縮量は温度補正を行うと更に良好な予測をなし得る。また、上プレート５の橋軸方向Ｘの移動量は、移動時の温度による上部構造物７の伸縮量を考慮して行うとよい。   Next, as shown in FIG. 5, a hydraulic jack 49 (the removed hydraulic jack 48 may be used) is attached to a portion of the sliding contact plate 33 on the direction B side to be described later with a bolt 53 and the hydraulic jack 49 is expanded and contracted. The tip of the rod 54 is attached to the upper plate 5, and the operation of the hydraulic jack 49 gives the upper plate 5 a tensile force in the direction B opposite to the direction A, thereby causing the upper plate 5 to move in the direction with respect to the sliding contact plate 33. Move to B. Here, the upper plate 5 is moved to remove the shear deformation in the bridge axis direction X of the rubber support 2 based on the amount of elastic shrinkage due to the prestress of the upper structure 7 and the amount of creep drying shrinkage after the prestress is introduced. In addition to the above, the amount of movement that compensates for the shear deformation in the bridge axis direction X of the rubber bearing body 2 based on the remaining creep drying shrinkage amount estimated from the measured and recorded creep drying shrinkage amount after introduction of prestress as described above. To move in the direction B. As shown in FIG. 6, the elastic bearing body 1 in which the upper plate 5 is moved in the direction B with the amount of movement is sheared and deformed, and the upper plate 5 is in the direction B from the center position of the sliding plate 33. It is arranged at a position eccentric to the side. The positioning of the upper plate 5 to be moved in the direction B with the moving amount is such that the positioning plate 51 detachably attached to the sliding contact plate 33 via the guide plate 38 by the bolt 55 is moved in the direction B. This is done by contacting the plate 5. By using such a positioning plate 51, the upper plate 5 can be easily positioned. The dimension of the positioning plate 51 is appropriately changed according to the movement amount. It should be noted that the remaining creep drying shrinkage can be predicted even better if temperature correction is performed. Further, the amount of movement of the upper plate 5 in the bridge axis direction X may be determined in consideration of the amount of expansion / contraction of the upper structure 7 due to the temperature during movement.

油圧ジャッキ４９の作動による上プレート５の移動後、図７に示すように、ボルト３５により上プレート５を摺接プレート３３に仮固定又は固定する。その後、図８に示すように油圧ジャッキ４９を摺接プレート３３から取り外す。尚、油圧ジャッキ４８及び４９が取り外された状態の摺接プレート３３のジャッキ取り付け用のボルト穴（図示せず）には、穴埋めボルト５２が装着される。   After the upper plate 5 is moved by the operation of the hydraulic jack 49, the upper plate 5 is temporarily fixed or fixed to the sliding contact plate 33 with bolts 35 as shown in FIG. Thereafter, the hydraulic jack 49 is removed from the sliding contact plate 33 as shown in FIG. A hole-filling bolt 52 is attached to a bolt hole (not shown) for attaching the jack of the sliding contact plate 33 with the hydraulic jacks 48 and 49 removed.

上プレート５の上述のような移動は、全移動量を複数回分の量に分けて所定期間毎に繰返し行ってもよく、この場合、上プレート５の全移動量は弾性支承体１の許容剪断変形量に制限されなくなる。   The movement of the upper plate 5 as described above may be repeated every predetermined period by dividing the total movement amount into a plurality of times. In this case, the total movement amount of the upper plate 5 is the allowable shear of the elastic support 1. The amount of deformation is no longer limited.

上プレート５の摺接プレート３３に対する最後の移動後、上プレート５をボルト３５及び溶接により摺接プレート３３に固定して、その溶接部を補塗装する。   After the final movement of the upper plate 5 with respect to the sliding contact plate 33, the upper plate 5 is fixed to the sliding contact plate 33 by bolts 35 and welding, and the welded portion is supplementarily coated.

以上の弾性支承体１の据付方法によれば、プレストレス導入後のクリープ乾燥収縮量から残余のクリープ乾燥収縮量が予測され、この予測された残余のクリープ乾燥収縮量に基づいて上プレート５が移動されて最終的に固定されるため、より正確な残余のクリープ乾燥収縮量だけ弾性支承体１のゴム支承体２が偏心されることとなり、その結果クリープ乾燥収縮がほぼ終了した時点では、図９に示すように、ゴム支承体２の剪断変形はほぼゼロとなり、地震等の振動、変位に対して、均等な性能を発揮し得ることとなる。また、剪断変形がほぼゼロの状態で上部構造物７を支持し得るため、より安定な支承となる。   According to the installation method of the elastic bearing body 1 described above, the remaining creep drying shrinkage amount is predicted from the creep drying shrinkage amount after the pre-stress is introduced, and the upper plate 5 is formed on the basis of the predicted residual creep drying shrinkage amount. Since it is moved and finally fixed, the rubber bearing 2 of the elastic bearing body 1 is decentered by a more accurate residual creep drying shrinkage. As a result, when the creep drying shrinkage is almost finished, As shown in FIG. 9, the shear deformation of the rubber support 2 becomes substantially zero, and can exhibit an equivalent performance against vibrations and displacements such as earthquakes. In addition, since the upper structure 7 can be supported in a state where the shear deformation is substantially zero, a more stable support is provided.

構造物１５が本例のように橋梁である場合には、上部構造物７のプレストレスによる弾性収縮及びクリープ乾燥収縮は主に橋軸方向Ｘに関して生じるために、橋軸方向Ｘに関しては制限されることなく上プレート５を上部構造物７に対して移動させることができる。   When the structure 15 is a bridge as in this example, the elastic shrinkage and the creep drying shrinkage due to the prestress of the upper structure 7 mainly occur in the bridge axis direction X, and thus are limited in the bridge axis direction X. The upper plate 5 can be moved with respect to the upper structure 7 without any change.

本例の構造物用弾性支承体の据付方法によれば、ゴム支承体２、ゴム支承体２の上面３に取り付けられた上プレート５及びゴム支承体２の下面４に取り付けられた下プレート６を具備した弾性支承体１の下プレート６を下部構造物９に固定し、上プレート５を上部構造物７の下面８に仮固定し、この仮固定から一定期間経過した後に、上プレート５の上部構造物７への仮固定を解除し、ゴム支承体２の剪断変形を除去するための移動量をもって上プレート５を上部構造物７に対して水平方向に移動させ、この移動後に上プレート５を上部構造物７の下面８に固定するために、より詳細には、ゴム支承体２、ゴム支承体２の上面３に取り付けられた上プレート５及びゴム支承体２の下面４に取り付けられた下プレート６を具備した弾性支承体１の下プレート６を下部構造物９に固定し、上プレート５をコンクリート製の上部構造物７の下面８に仮固定し、上部構造物７にプレストレスを導入し、このプレストレスの導入から一定期間経過した後に、上プレート５の上部構造物７への仮固定を解除し、上部構造物７のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量に基づくゴム支承体２の水平方向の剪断変形を除去するための移動量をもって上プレート５を上部構造物７に対して水平方向に移動させ、この移動後に上プレート５を上部構造物７の下面８に固定するために、下部構造物７の寸法に制限されることなく上プレート５を水平方向に移動させることができて、構造物１５の完成時にゴム支承体２の剪断変形量を可能な限り小さくし得て弾性支承体１をほぼ直立状態にすることができ、斯かる弾性支承体１により地震等の振動に対する所望の性能を発揮し得る構造物１５を構築することができ、力学的に必要とされる寸法のゴム支承体２よりも大きなゴム支承体を選択する必要も低減させることができ、また、下プレート６の下部構造物９に対する水平方向の移動量を考慮することなく下部構造物９を最適に設計することができると共に構造物１５、特に下部構造物９の材料費等の増加を防止することができ、しかも、下プレート６を下部構造物９に対して水平方向に移動させるための領域が不要となることから下部構造物９上の工具等の載置領域を確保することができ、而して、最終的な据付後のゴム支承体２の剪断変形量を可能な限り小さくし得ると共に過度に大きな下部構造物を必要とせずに下部構造物９を最適に設計することができ、構造物１５の低廉化を図り得、しかも、弾性支承体１の据付に関する作業容易性の維持、向上をも図り得る。また、本例の構造物用弾性支承体の据付方法によれば、上プレート５と上部構造物７との間に雨水、塵埃等が入り込む虞を軽減して上プレート５と上部構造物７との摺動摩擦抵抗が増大する虞を低減させることができ、上プレート５を上部構造物７の下面８に仮固定、固定するために、上プレート５が上部構造物７の直下に配置されることから、上プレート５及び／又は摺接プレート３３に、摺動摩擦抵抗を低減するため施された摺動材料、例えば四フッ化エチレン樹脂の直射日光等による温度上昇に基づく早期の劣化を防止することができ、しかも、例えば上プレート５と上部構造物７との仮固定にボルト３５を用いる場合には、斯かるボルト３５が挿通され、螺合されるボルト孔４１及びボルト穴４２への雨水の浸入等による腐食や塵埃等の付着が生じる虞を軽減させることができ、而して、上プレート５の仮固定の解除や上プレート５の上部構造物７に対する水平方向の移動を容易に行い得る。加えて、本例の構造物用弾性支承体の据付方法によれば、弾性支承体１の下部構造物９に対する位置ずれを生じさせることがなく、斯かる位置ずれ及び上部構造物７の荷重に基づく想定外のモーメントを下部構造物９に作用させる虞をなくし得る。   According to the installation method of the elastic bearing body for a structure of this example, the rubber bearing body 2, the upper plate 5 attached to the upper surface 3 of the rubber bearing body 2, and the lower plate 6 attached to the lower surface 4 of the rubber bearing body 2. The lower plate 6 is fixed to the lower structure 9 and the upper plate 5 is temporarily fixed to the lower surface 8 of the upper structure 7. After a certain period of time has elapsed since the temporary fixing, The upper plate 5 is moved in the horizontal direction with respect to the upper structure 7 with a moving amount for releasing the temporary fixing to the upper structure 7 and removing the shear deformation of the rubber support 2, and after this movement, the upper plate 5 Are fixed to the lower surface 8 of the upper structure 7, more specifically, the rubber support 2, the upper plate 5 attached to the upper surface 3 of the rubber support 2, and the lower surface 4 of the rubber support 2. Elastic bearing body 1 having a lower plate 6 The lower plate 6 is fixed to the lower structure 9, the upper plate 5 is temporarily fixed to the lower surface 8 of the concrete upper structure 7, and prestress is introduced into the upper structure 7. After the elapse of time, the temporary fixing of the upper plate 5 to the upper structure 7 is released, and the horizontal direction of the rubber support 2 based on the amount of elastic shrinkage due to the prestress of the upper structure 7 and the amount of creep drying shrinkage after the prestress is introduced. The upper plate 5 is moved in the horizontal direction with respect to the upper structure 7 with a movement amount for removing the shear deformation of the lower structure, and the lower plate 8 is fixed to the lower surface 8 of the upper structure 7 after this movement. The upper plate 5 can be moved in the horizontal direction without being limited by the dimensions of the object 7, and the elastic bearing body can reduce the shear deformation amount of the rubber bearing body 2 as much as possible when the structure 15 is completed. It is possible to construct a structure 15 capable of exhibiting a desired performance against vibrations such as an earthquake by the elastic bearing body 1, and a rubber bearing having a mechanically required size. The need to select a rubber bearing body larger than the body 2 can be reduced, and the lower structure 9 can be optimally designed without considering the amount of horizontal movement of the lower plate 6 relative to the lower structure 9. In addition, the material cost of the structure 15, particularly the lower structure 9, can be prevented and an area for moving the lower plate 6 in the horizontal direction with respect to the lower structure 9 is not required. Therefore, it is possible to secure a mounting area for the tool or the like on the lower structure 9, and thus the amount of shear deformation of the rubber support 2 after the final installation can be made as small as possible and excessively large. Requires substructure Therefore, the lower structure 9 can be optimally designed, and the structure 15 can be reduced in cost, and the workability related to the installation of the elastic support 1 can be maintained and improved. Also, according to the method of installing the elastic support for a structure of this example, the possibility of rainwater, dust, etc. entering between the upper plate 5 and the upper structure 7 is reduced, and the upper plate 5 and the upper structure 7 The possibility of increasing the sliding frictional resistance of the upper structure 5 can be reduced, and the upper plate 5 is disposed immediately below the upper structure 7 in order to temporarily fix and fix the upper plate 5 to the lower surface 8 of the upper structure 7. In addition, it is possible to prevent early deterioration based on a temperature rise due to direct sunlight of a sliding material, for example, tetrafluoroethylene resin, which is applied to the upper plate 5 and / or the sliding contact plate 33 to reduce sliding frictional resistance. In addition, for example, when a bolt 35 is used for temporarily fixing the upper plate 5 and the upper structure 7, the rainwater is inserted into the bolt hole 41 and the bolt hole 42 into which the bolt 35 is inserted and screwed. Corrosion and dust due to intrusion, etc. It is possible to reduce the possibility that adhesion occurs in and Thus, capable of performing movement in the horizontal direction with respect to the superstructure 7 of the temporary fixing of the release and the upper plate 5 of the upper plate 5 easily. In addition, according to the installation method of the elastic bearing body for a structure of this example, the elastic bearing body 1 is not displaced with respect to the lower structure 9, and the positional displacement and the load of the upper structure 7 are prevented. It is possible to eliminate the possibility of an unexpected moment based on the lower structure 9 being applied.

本例の構造物用弾性支承体の据付方法によれば、上部構造物７のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量に基づくゴム支承体２の水平方向の剪断変形を除去するための移動量に加えて、更にプレストレス導入後のクリープ乾燥収縮量から予測した残余のクリープ乾燥収縮量に基づくゴム支承体２の水平方向の剪断変形を補償するための移動量をもって、上プレート５を上部構造物７に対して水平方向に移動させ、この移動後に上プレート５を上部構造物７の下面８に固定するために、上部構造物７の実際の収縮量がその組成、温度等により種々ばらついても、それに対応して最終的な据付後のゴム支承体２の剪断変形量を可能な限り小さくし得る。   According to the installation method of the elastic bearing body for the structure of this example, the horizontal shear deformation of the rubber bearing body 2 based on the amount of elastic shrinkage due to the prestress of the upper structure 7 and the creep drying shrinkage amount after the prestress is introduced. In addition to the amount of movement to remove, the amount of movement to compensate for the horizontal shear deformation of the rubber support 2 based on the amount of creep dry shrinkage remaining from the amount of creep dry shrinkage after introduction of prestress, In order to move the upper plate 5 in the horizontal direction with respect to the upper structure 7 and to fix the upper plate 5 to the lower surface 8 of the upper structure 7 after this movement, the actual contraction amount of the upper structure 7 has its composition, Even if there are various variations due to temperature or the like, the amount of shear deformation of the rubber support 2 after final installation can be made as small as possible.

本例の構造物用弾性支承体の据付方法では、上プレート５を所定期間毎に水平方向に移動させてもよく、上プレート５を水平方向に複数回移動させてもよい。このように移動させる場合には、ゴム支承体２に過度なストレスを与えることなく、より長い水平方向の移動が可能となる。   In the installation method of the structural elastic support body of this example, the upper plate 5 may be moved in the horizontal direction every predetermined period, or the upper plate 5 may be moved in the horizontal direction a plurality of times. When moving in this way, a longer horizontal movement is possible without applying excessive stress to the rubber support 2.

尚、ゴム支承体２としては、ゴム弾性体１１の内部に、一本又は複数本の鉛プラグを埋設したものを用いてもよい。   As the rubber support 2, a rubber elastic body 11 in which one or a plurality of lead plugs are embedded may be used.

本発明の実施の形態の例の構造物用弾性支承体の据付方法に関する説明図である。It is explanatory drawing regarding the installation method of the elastic support body for structures of the example of embodiment of this invention. 図１に示す構造物用弾性支承体のＩＩ−ＩＩ線断面矢視説明図である。It is II-II sectional view taken on the line of the elastic support body for structures shown in FIG. 図１に示す構造物用弾性支承体の平面図である。It is a top view of the elastic support body for structures shown in FIG. 本発明の実施の形態の例の構造物用弾性支承体の据付方法に関する説明図である。It is explanatory drawing regarding the installation method of the elastic support body for structures of the example of embodiment of this invention. 本発明の実施の形態の例の構造物用弾性支承体の据付方法に関する説明図である。It is explanatory drawing regarding the installation method of the elastic support body for structures of the example of embodiment of this invention. 本発明の実施の形態の例の構造物用弾性支承体の据付方法に関する説明図である。It is explanatory drawing regarding the installation method of the elastic support body for structures of the example of embodiment of this invention. 本発明の実施の形態の例の構造物用弾性支承体の据付方法に関する説明図である。It is explanatory drawing regarding the installation method of the elastic support body for structures of the example of embodiment of this invention. 本発明の実施の形態の例の構造物用弾性支承体の据付方法に関する説明図である。It is explanatory drawing regarding the installation method of the elastic support body for structures of the example of embodiment of this invention. 本発明の実施の形態の例の構造物用弾性支承体の据付方法に関する説明図である。It is explanatory drawing regarding the installation method of the elastic support body for structures of the example of embodiment of this invention.

符号の説明Explanation of symbols

１ 構造物用弾性支承体
２ ゴム支承体
５ 上プレート
６ 下プレート
７ 上部構造物
９ 下部構造物 DESCRIPTION OF SYMBOLS 1 Elastic support body for structures 2 Rubber bearing body 5 Upper plate 6 Lower plate 7 Upper structure 9 Lower structure

Claims (4)

ゴム支承体、ゴム支承体の上面に取り付けられた上プレート及びゴム支承体の下面に取り付けられた下プレートを具備した弾性支承体の下プレートを下部構造物に固定し、上プレートをコンクリート製の上部構造物の下面に設置された摺接プレートに摺動自在に接合させて鉛直方向に伸びた仮固定兼固定用のボルトによって仮固定し、上部構造物にプレストレスを導入し、このプレストレスの導入から一定期間経過した後に、油圧ジャッキを摺接プレートの上部構造物が収縮する方向側の部位に取り付けると共に当該油圧ジャッキの伸縮ロッドの先端を上プレートに取り付け、当該取り付けた油圧ジャッキの作動により上プレートに上部構造物が収縮する前記方向に向かう引張力を与えて前記仮固定兼固定用のボルトに加えられている剪断力を除去し、その後、当該仮固定兼固定用のボルトを摺接プレート及び上プレートから取り外すことによって上プレートの上部構造物への仮固定を解除し、前記油圧ジャッキを摺接プレート及び上プレートから取り外し、次に、油圧ジャッキを摺接プレートの上部構造物が収縮する前記方向側とは反対の方向側の部位に取り付けると共に当該油圧ジャッキの伸縮ロッドの先端を上プレートに取り付け、当該取り付けた油圧ジャッキの作動により上プレートに上部構造物が収縮する前記方向とは反対の方向に向かう引張力を与えて、上部構造物のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量に基づくゴム支承体の水平方向の剪断変形を除去するための移動量をもって、上プレートを上部構造物の下面に設置された摺接プレートに対して上部構造物が収縮する前記方向とは反対の方向であって水平方向に移動させ、この移動後に上プレートを上部構造物の下面に設置された摺接プレートに仮固定兼固定用のボルトによって固定する構造物用弾性支承体の据付方法。 The lower plate of the elastic bearing body having the rubber bearing body, the upper plate attached to the upper surface of the rubber bearing body and the lower plate attached to the lower surface of the rubber bearing body is fixed to the lower structure, and the upper plate is made of concrete. The prestress is introduced into the upper structure by slidably joining the sliding plate installed on the lower surface of the upper structure and temporarily fixed by a bolt for temporary fixing and fixing extending in the vertical direction. After a certain period of time has passed since the introduction of the hydraulic jack, attach the hydraulic jack to the part of the sliding contact plate where the upper structure contracts, attach the tip of the telescopic rod of the hydraulic jack to the upper plate, and operate the attached hydraulic jack The shear force applied to the bolt for temporary fixing and fixing by applying a tensile force in the direction in which the upper structure contracts to the upper plate by After that, the temporary fixing to the upper structure of the upper plate is released by removing the temporary fixing and fixing bolt from the sliding contact plate and the upper plate, and the hydraulic jack is removed from the sliding contact plate and the upper plate. Next, the hydraulic jack is attached to a portion on the direction side opposite to the direction side where the upper structure of the sliding contact plate contracts, and the tip of the telescopic rod of the hydraulic jack is attached to the upper plate, and the attached hydraulic jack A rubber based on the amount of elastic shrinkage due to prestress of the upper structure and the amount of creep drying shrinkage after the introduction of prestress by applying a tensile force in the direction opposite to the direction in which the upper structure shrinks to the upper plate by the operation of The upper plate was installed on the lower surface of the upper structure with the amount of movement to remove the horizontal shear deformation of the support body. The upper plate is moved in the horizontal direction opposite to the direction in which the upper structure contracts with respect to the contact plate, and after this movement, the upper plate is temporarily fixed and fixed to the sliding contact plate installed on the lower surface of the upper structure. To install elastic bearings for structures fixed with bolts . 上部構造物のプレストレスによる弾性収縮量及びプレストレス導入後のクリープ乾燥収縮量に基づくゴム支承体の水平方向の剪断変形を除去するための移動量に加えて、更にプレストレス導入後のクリープ乾燥収縮量から予測した残余のクリープ乾燥収縮量に基づくゴム支承体の水平方向の剪断変形を補償するための移動量をもって、上プレートを上部構造物に対して上部構造物が収縮する前記方向とは反対の方向であって水平方向に移動させ、この移動後に上プレートを上部構造物の下面に設置された摺接プレートに仮固定兼固定用のボルトによって固定する請求項１に記載の構造物用弾性支承体の据付方法。 In addition to the amount of movement to remove horizontal shear deformation of the rubber base based on the amount of elastic shrinkage due to prestress of the superstructure and the amount of creep drying shrinkage after the prestress is introduced, creep drying after the introduction of prestress What is the direction in which the upper structure contracts the upper plate with respect to the upper structure with a movement amount to compensate for the horizontal shear deformation of the rubber bearing based on the residual creep drying shrinkage amount predicted from the shrinkage amount? The structure according to claim 1, wherein the upper plate is fixed to a sliding contact plate installed on the lower surface of the upper structure with a bolt for temporarily fixing and fixing, after moving in the opposite direction and in the horizontal direction. Installation method for elastic bearings. 上プレートを所定期間毎に水平方向に移動させる請求項１又は２に記載の構造物用弾性支承体の据付方法。 The installation method of the elastic support body for structures according to claim 1 or 2 , wherein the upper plate is moved in the horizontal direction every predetermined period . 上プレートを水平方向に複数回移動させる請求項１から３のいずれか一項に記載の構造物用弾性支承体の据付方法。 The method for installing an elastic support for a structure according to any one of claims 1 to 3, wherein the upper plate is moved a plurality of times in the horizontal direction .
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63210303A (en) * 1987-02-24 1988-09-01 オリエンタル建設株式会社 Horizontal force dispersible type elastic support apparatus
JPH05272115A (en) * 1992-03-25 1993-10-19 Kaimon:Kk Preliminary shear deformation installation method for rubber support and its device
JPH06173220A (en) * 1992-12-04 1994-06-21 Shiyuto Kosoku Doro Kodan Installing method for elastic bearing body for structure
JPH09158117A (en) * 1995-12-08 1997-06-17 Kaimon:Kk Rubber support preliminary shear deformation installation method for structure and device therefor
JP2001234977A (en) * 2000-02-22 2001-08-31 Tokai Rubber Ind Ltd Post-slide type rubber support device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63210303A (en) * 1987-02-24 1988-09-01 オリエンタル建設株式会社 Horizontal force dispersible type elastic support apparatus
JPH05272115A (en) * 1992-03-25 1993-10-19 Kaimon:Kk Preliminary shear deformation installation method for rubber support and its device
JPH06173220A (en) * 1992-12-04 1994-06-21 Shiyuto Kosoku Doro Kodan Installing method for elastic bearing body for structure
JPH09158117A (en) * 1995-12-08 1997-06-17 Kaimon:Kk Rubber support preliminary shear deformation installation method for structure and device therefor
JP2001234977A (en) * 2000-02-22 2001-08-31 Tokai Rubber Ind Ltd Post-slide type rubber support device

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