JP3677573B2 - Telescopic device for bridge - Google Patents

Telescopic device for bridge Download PDF

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Publication number
JP3677573B2
JP3677573B2 JP26432298A JP26432298A JP3677573B2 JP 3677573 B2 JP3677573 B2 JP 3677573B2 JP 26432298 A JP26432298 A JP 26432298A JP 26432298 A JP26432298 A JP 26432298A JP 3677573 B2 JP3677573 B2 JP 3677573B2
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bridge
plate
fingers
finger
intermediate member
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JP2000096503A (en
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俊成 小田
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Nitta Corp
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Nitta Corp
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Description

【発明の属する技術分野】
【０００１】
この発明は、ラップ式の橋梁用伸縮装置に関するものである。
【従来の技術】
【０００２】
ラップ式の橋梁用伸縮装置は、例えば図９に示すように、遊間Ｕを有して隣り合う橋桁Ｈ，Ｈの各対向面上部に固定配置されたフィンガー40を有するプレート４を、一方のプレート４が他方のプレート４の一部に被さるように構成されており、橋桁Ｈ，Ｈの温度変化等による伸縮を、両方のプレート４，４が相対移動し、一方のプレート４のフィンガー40が他方のプレート４の隣り合うフィンガー40，40相互間に挿脱される態様で吸収されるようにしてある。
【０００３】
しかしながら、上記橋梁用伸縮装置では、車両通行の安全上、両プレート４，４のフィンガー40，40間には大きな隙間を取ることができない。故に、地震等により橋軸方向又は橋軸直角方向に橋桁Ｈ，Ｈが大きく相対移動した場合、橋桁Ｈ，Ｈの相対移動を十分に吸収することはできない。
【０００４】
また、橋桁Ｈ，Ｈが地震等により橋軸方向又は橋軸直角方向に大きく相対移動した場合には、相対向するプレート４，４相互が衝突し、フィンガー40等が損傷するだけでなく他の橋梁部材までも損傷する恐れがある。特に、免震設計の橋梁では、橋梁の免震機能までも損なう恐れがある。また、フィンガー40に損傷が生じた場合、緊急車両の通過ができなくなったりして救助活動に大きな問題となる。
【発明が解決しようとする課題】
【０００５】
そこで、この発明は、橋軸方向又は橋軸直角方向の大きな移動量を吸収でき、しかも車両の通行にも支障が出ない橋梁用伸縮装置を提供することを課題とする。
【課題を解決するための手段】
【０００６】
【課題を解決するための手段】
（請求項１記載の発明）
この発明の橋梁用伸縮装置は、一方側の橋台又は橋桁と他方側の橋桁の対向する部分にそれぞれ固定されたプレートを具備し、いずれか一方のプレートは他方のプレート側に突出するように橋軸直角方向に複数配列されたフィンガーを有し、他方のプレートは上面に橋軸直角方向に複数配列されたフィンガーを有し、一方のプレートが他方のプレートの一部に被さるようにしていると共に、一方のプレートのフィンガーが、他方のプレートの隣合うフィンガー相互間に遊挿されている橋梁用伸縮装置に於いて、他方のプレート上における両プレートのフィンガー間の隙間に、当該隙間の一部を填補する中間部材を固定してあり、中間部材は、一方のフィンガーとの間に隙間があり、温度変化に起因する橋桁相互の相対移動では、一方のフィンガーが衝突しないため、他方のプレート上から離脱せずに固定されたままであり、地震により橋桁相互が橋軸方向又は橋軸直角方向に大きく相対移動し、一方のフィンガーが衝突したときには、他方のプレート上に固定された状態から離脱するようになっている。
（請求項２記載の発明）
この発明の橋梁用伸縮装置は、一方側の橋台又は橋桁と他方側の橋桁の対向する部分にそれぞれ固定されたプレートを具備し、いずれか一方のプレートは他方のプレート側に突出するように橋軸直角方向に複数配列されたフィンガーを有し、他方のプレートは上面に橋軸直角方向に複数配列されたフィンガーを有し、一方のプレートが他方のプレートの一部に被さるようにしていると共に、一方のプレートのフィンガーが、他方のプレートの隣合うフィンガー相互間に遊挿されている橋梁用伸縮装置に於いて、他方のプレート上における両プレートのフィンガー間の隙間に、当該隙間の一部を填補する中間部材を設けてあり、中間部材は、一方のフィンガーとの間に隙間があり、温度変化に起因する橋桁相互の相対移動では、一方のフィンガーが衝突しないため、他方のプレート上で圧潰せず、地震により橋桁相互が橋軸方向又は橋軸直角方向に大きく相対移動し、一方のフィンガーが衝突したときには、他方のプレート上で圧潰し、圧潰したままになっている。
【０００７】
（請求項２記載の発明）
請求項２記載の発明は、一方側の橋台又は橋桁と他方側の橋桁の対向する部分にそれぞれ固定されたプレートを具備し、いずれか一方のプレートは他方のプレート側に突出するように橋軸直角方向に複数配列されたフィンガーを有し、他方のプレートは上面に橋軸直角方向に複数配列されたフィンガーを有し、一方のプレートが他方のプレートの一部に被さるようにしていると共に、一方のプレートのフィンガーが、他方のプレートの隣合うフィンガー相互間に遊挿されている橋梁用伸縮装置に於いて、他方のプレート上の両プレートのフィンガー間の隙間に、当該隙間の一部を填補する中間部材を設け、一方のプレートのフィンガーが中間部材に衝突すると、中間部材が圧潰するようにしている。
【０００８】
上記発明の橋梁用伸縮装置の機能については、以下の発明の実施の形態の欄で詳述する。
【発明の実施の形態】
【０００９】
（参考形態１）
この参考形態１の橋梁用伸縮装置は、図１に示すように、免震装置Ｍを介して橋脚Ｈ’により支持された遊間Ｕを有する橋桁Ｈ，Ｈの間に配置されるもので、図１や図２に示す如く橋桁Ｈ，Ｈの対向する部分にそれぞれプレート１を具備し、一方のプレート１は他方のプレート１側に突出するように橋軸直角方向に複数配列されたフィンガー２を有し、他方のプレート１は上面に橋軸直角方向に複数配列されたフィンガー２を有し、一方のプレート１が他方のプレート１の一部に被さるようにしていると共に、一方のプレート１のフィンガー２の先端部が、他方のプレート１の隣合うフィンガー２の先端部相互間に遊挿される態様としている。そして、他方のプレート１上の両プレート１，１のフィンガー２，２間の隙間に、隙間の一部を填補し、一方のプレート１のフィンガー２が衝突すると変形するようにした中間部材３を設けている。
【００１０】
プレート１は、鋼材で形成された橋軸直角方向に長いもので、一方のプレート１は板状で、下方に設けた縦板11と補強リブ12に固定され、他方のプレート１は、板状の水平部分13と、前記一方のプレート１側に設けられた垂直部分14からなり、補強リブ12に固定され、一方のプレート１が他方のプレート１の水平部分13に上から被さるようにすると共に、両プレート１，１のフィンガー２，２間に隙間が生じるようにして設置されている。図３は、中間部材３を他方のプレート１に設置する前の状態を示す図である。図から明らかなように、この橋梁用伸縮装置では、フィンガー２，２間に、従来のものより大きな隙間が生じるようにしている。
【００１１】
なお、一方のプレート１は、図示しないアンカーにより橋桁Ｈ，Ｈに強固に固定されており、この固定状態においてプレート１の上面と橋桁Ｈ，Ｈの上面が略面一となっている。
【００１２】
前記一方のプレート１のフィンガー２は、プレート１の一部として形成されており、先端方向に幅が小さくなる略台形状としている。他方のプレート１のフィンガー２は、プレート１の上面に設けられており、三角形状としている。なお、フィンガー２は、図４、図５に示すように、フィンガー２の上面と前記一方のプレート１の上面が略一致したものとなっている。
【００１３】
中間部材３は、ゴム等の弾性材料からなり、両プレート１，１のフィンガー２，２間の隙間に挿入できるように、ジグザグ形状としたもので、縦断面をＭ字状とし、上面を平坦にして、この上面と前記一方のプレート１の上面が略一致するようにしている。この参考形態１では、中間部材３が他方のプレート１のフィンガー２に当接するように設けられている。
【００１４】
この参考形態１の橋梁用伸縮装置は上記のような構成であるから、橋桁Ｈ，Ｈが橋軸方向又は橋軸直角方向に相対移動するような事態（例えば地震等）が生じて一方のプレート１のフィンガー２が中間部材３に衝突した場合、中間部材３は縦断面のＭ字の幅が圧縮された状態になる。
【００１５】
すなわち、橋桁Ｈ，Ｈが橋軸方向に相対移動した場合は、ジグザグ状の中間部材３の橋軸直角方向に対して平行な部分が圧縮され、橋桁Ｈ，Ｈが橋軸直角方向に相対移動した場合は、中間部材３の橋軸直角方向に対して斜めの部分が圧縮される。これにより、両プレート１，１のフィンガー２，２は直接相互衝突することがなく、衝撃が和らげられると共に、前記相対移動が吸収される。
【００１６】
しかも、中間部材３は両プレート１，１のフィンガー２，２間の隙間に存在し、隙間の一部を填補するので、車両の通行にも支障が出ない。なお、温度変化に起因する橋桁Ｈ，Ｈの相対移動では、前記フィンガー２と中間部材３との衝突は生じないようになっている。
【００１７】
つまり、この橋梁用伸縮装置は、両プレート１，１のフィンガー２，２間に大きな隙間を確保することが可能となり、橋桁Ｈ，Ｈが橋軸方向及び橋軸直角方向のいずれに大きく相対移動した場合でも、破損することなく前記相対移動を十分に吸収でき、しかも、車両は中間部材３により車輪が隙間に嵌まらず、安全に走行することができる。
【００１８】
なお、中間部材３は、前記フィンガー２の衝突により変形しても、破損することなく再び元の形状に回復する。また、万が一中間部材３が破損した場合でも、破損した中間部材３を新しい中間部材３に交換するだけで容易に修復することができ、橋梁用伸縮装置の全面的な修復作業を必要としない。
【００１９】
（参考形態２）
この参考形態２の橋梁用伸縮装置は、図６に示すように、前記中間部材３の縦断面をＮ字状としたものである。このように、中間部材３は縦断面をＭ字状としたものに限られず、Ｖ字が複数連なった形状等、フィンガー２が衝突したときに圧縮される等、変形可能な形状であればよい。
【００２０】
（実施形態１）
この実施形態１の橋梁用伸縮装置は、図７、図８に示すように、中間部材３を前記他方のプレート１上の両プレート１，１のフィンガー２，２間の隙間に固定し、地震等により橋桁Ｈ，Ｈが橋軸方向又は橋軸直角方向に相対移動するような事態が生じて一方のプレート１のフィンガー２が中間部材３に衝突した場合、中間部材３が離脱するようにしたものである。
【００２１】
中間部材３は、鋼材やコンクリート、硬質ゴム等により形成されたもので、ノックピン等で他方のプレート１に固定され、車両の通行や温度変化に起因する橋桁Ｈ，Ｈの相対移動では離脱しないようにしている。また、中間部材３が離脱した際、中間部材３が橋軸方向及び橋軸直角方向に移動できるように、中間部材３は、両プレート１，１のフィンガー２，２のそれぞれとの間に間隔が生じるようにしている。
【００２２】
このようにすることにより、地震等で橋桁Ｈ，Ｈが橋軸方向又は橋軸直角方向に大きく相対移動し、一方のフィンガー２が中間部材３に衝突すると、中間部材３が他方のプレート１上に固定された状態から離脱し、衝突の衝撃が吸収されると共に、両プレート１，１が橋軸方向又は橋軸直角方向に大きく相対移動可能となり、前記橋桁Ｈ，Ｈの相対移動が吸収される。従って、プレート１や他の橋梁部材の損傷が防止され、また、離脱した中間部材３を再び固定することにより、容易に修復することが可能である。
【００２３】
なお、中間部材３のフィンガー２が衝突する部分をゴムで被覆してもよい。このようにすると、フィンガー相互の衝突音の発生を抑制できる。
【００２４】
（実施形態２）
この実施形態２の橋梁用伸縮装置は、図９に示すように、中間部材３を前記参考形態１と同様に両プレート１，１のフィンガー２，２間の隙間に固定したもので、一方のプレート１のフィンガー２が衝突すると、中間部材３が圧潰するようにしたものである。
【００２５】
この中間部材３は、鋼材でできた縦断面がＭ字状の圧潰部30とその両側の壁31で構成されており、地震等により橋桁Ｈ，Ｈが橋軸方向又は橋軸直角方向に相対移動するような事態が生じて一方のプレート１のフィンガー２が中間部材３に衝突した場合、中間部材３の圧潰部30が縦断面のＭ字の幅が圧縮された状態になる。
【００２６】
なお、圧潰部30は前記の形状に限られず、縦断面をＮ字状としたり、Ｖ字が複数連なった形状としたり等、フィンガー２が衝突すると圧潰する形状であればよい。
【００２７】
このように、中間部材３をフィンガー２の衝突により圧潰する構造とすると、フィンガー２の衝突による衝撃を効果的に吸収することが可能である。従って、プレート１や他の橋梁部材の損傷が防止され、また、圧潰した中間部材３を交換することにより、容易に修復することが可能である。
【００２８】
（その他の参考形態及び実施形態）
上記参考形態及び実施形態では、橋桁と橋桁との間にこの発明の橋梁用伸縮装置を設けてあるが、橋桁と橋台との間にこの発明の橋梁用伸縮装置を設けることも可能である。
【００２９】
また、図10のように、中間部材３を複数列設けてもよい。このようにすれば、両プレート１，１のフィンガー２，２間の隙間をさらに大きくすることができる。図11のように、両プレート１，１のフィンガー２，２のそれぞれに当接するように、中間部材３，３を設けてもよい。さらに、一方のプレート１のフィンガー２が中間部材３に衝突すると、中間部材３が圧潰すると共に、離脱するようにしてもよい。
【発明の効果】
【００３０】
この発明の橋梁用伸縮装置では、橋軸方向又は橋軸直角方向の大きな移動量を吸収できると共に、車両の通行にも支障が出ない。
【図面の簡単な説明】
【図１】 この発明の参考形態１の橋梁用伸縮装置が、免震装置を介して橋脚に支持された橋桁相互間に設置されている状態を示す断面図。
【図２】 前記橋梁用伸縮装置の斜視図。
【図３】 前記橋梁用伸縮装置の中間部材を設置する前の状態を示す断面図。
【図４】 図２のＸ−Ｘ断面図。
【図５】 図２のＹ−Ｙ断面図。
【図６】 この発明の参考形態２の橋梁用伸縮装置の断面図。
【図７】 この発明の実施形態１の橋梁用伸縮装置が、免震装置を介して橋脚に支持された橋桁相互間に設置されている状態を示す断面図。
【図８】 この発明の実施形態２の橋梁用伸縮装置の斜視図。
【図９】 この発明の実施形態２の橋梁用伸縮装置の断面図。
【図10】 中間部材を複数列設けた場合を示す平面図。
【図11】 中間部材を両プレートのフィンガーそれぞれに当接させて設けた場合を示す斜視図。
【図12】 先行技術の橋梁用伸縮装置の斜視図。
【符号の説明】
１ プレート
２ フィンガー
３ 中間部材BACKGROUND OF THE INVENTION
[0001]
The present invention relates to a wrap-type bridge expansion and contraction device.
[Prior art]
[0002]
For example, as shown in FIG. 9, the wrap-type bridge expansion / contraction device has a plate 4 having fingers 40 fixedly arranged on the upper surfaces of the adjacent bridge girders H, H with a gap U, on one plate. 4 is configured to cover a part of the other plate 4, both plates 4, 4 move relative to each other due to temperature changes of the bridge girders H, H, and the finger 40 of one plate 4 moves to the other The plate 4 is absorbed in such a manner that it is inserted and removed between the adjacent fingers 40 of the plate 4.
[0003]
However, in the bridge extension / contraction apparatus, a large gap cannot be formed between the fingers 40 of the both plates 4 and 4 for the safety of vehicle traffic. Therefore, when the bridge girders H and H move relatively in the bridge axis direction or the direction perpendicular to the bridge axis due to an earthquake or the like, the relative movement of the bridge girders H and H cannot be sufficiently absorbed.
[0004]
Also, when the bridge girders H, H move greatly in the direction of the bridge axis or perpendicular to the bridge axis due to an earthquake or the like, the opposing plates 4 and 4 collide with each other, not only damage the fingers 40 but also other Even bridge members may be damaged. In particular, in a seismic isolation design bridge, the seismic isolation function of the bridge may be impaired. In addition, when the finger 40 is damaged, the emergency vehicle cannot pass, which causes a serious problem in the rescue operation.
[Problems to be solved by the invention]
[0005]
Accordingly, an object of the present invention is to provide a bridge extension / contraction device that can absorb a large amount of movement in the direction of the bridge axis or in the direction perpendicular to the bridge axis and that does not interfere with the passage of the vehicle.
[Means for Solving the Problems]
[0006]
[Means for Solving the Problems]
(Invention of Claim 1)
The bridge expansion and contraction device according to the present invention includes plates fixed to opposing portions of one side abutment or bridge girder and the other side bridge girder, and either one of the plates protrudes to the other plate side. A plurality of fingers arranged in a direction perpendicular to the axis, and the other plate has a plurality of fingers arranged in a direction perpendicular to the bridge axis on the upper surface so that one plate covers a part of the other plate and In a bridge expansion / contraction device in which the fingers of one plate are loosely inserted between adjacent fingers of the other plate, a part of the gap is formed in the gap between the fingers of both plates on the other plate. The intermediate member is fixed, and there is a gap between the intermediate member and one of the fingers. Does not come off from the other plate, it remains fixed, and the bridge girders move greatly relative to each other in the direction of the bridge axis or the direction perpendicular to the bridge due to an earthquake. It comes out of being fixed on the plate.
(Invention of Claim 2)
The bridge expansion and contraction device according to the present invention includes plates fixed to opposing portions of one side abutment or bridge girder and the other side bridge girder, and either one of the plates protrudes to the other plate side. A plurality of fingers arranged in a direction perpendicular to the axis, and the other plate has a plurality of fingers arranged in a direction perpendicular to the bridge axis on the upper surface so that one plate covers a part of the other plate and In a bridge expansion / contraction device in which the fingers of one plate are loosely inserted between adjacent fingers of the other plate, a part of the gap is formed in the gap between the fingers of both plates on the other plate. The intermediate member has a gap between one finger and the intermediate member has one finger in the relative movement between the bridge girders due to temperature change. Will not collide on the other plate, and the bridge girders will move greatly relative to each other in the direction of the bridge axis or the direction perpendicular to the bridge due to the earthquake, and when one finger collides, the other plate will crush and crush Has been left.
[0007]
(Invention of Claim 2)
The invention according to claim 2 is provided with plates fixed to opposite portions of the abutment on one side or the bridge girder on the other side and the bridge girder on the other side, and either of the plates protrudes to the other plate side. A plurality of fingers arranged in a perpendicular direction, and the other plate has a plurality of fingers arranged in a direction perpendicular to the bridge axis on the upper surface so that one plate covers a part of the other plate, In a bridge telescopic device in which the fingers of one plate are loosely inserted between adjacent fingers of the other plate, a part of the gap is placed in the gap between the fingers of both plates on the other plate. An intermediate member for filling is provided, and when the finger of one plate collides with the intermediate member, the intermediate member is crushed.
[0008]
The function of the bridge expansion and contraction device of the above invention will be described in detail in the section of the embodiment of the invention below.
DETAILED DESCRIPTION OF THE INVENTION
[0009]
(Reference form 1)
As shown in FIG. 1, the bridge telescopic device according to the first embodiment is arranged between bridge girders H and H having a gap U supported by a bridge pier H ′ via a seismic isolation device M. As shown in FIG. 1 and FIG. 2, plates 1 are respectively provided on the opposite portions of the bridge beams H, H, and one plate 1 has a plurality of fingers 2 arranged in a direction perpendicular to the bridge axis so as to protrude toward the other plate 1 side. And the other plate 1 has a plurality of fingers 2 arranged on the upper surface in a direction perpendicular to the bridge axis so that one plate 1 covers a part of the other plate 1 and The tip of the finger 2 is loosely inserted between the tips of adjacent fingers 2 of the other plate 1. Then, an intermediate member 3 is formed in which the gap between the fingers 1 and 2 of both plates 1 and 1 on the other plate 1 is partially compensated and deformed when the fingers 2 of the other plate 1 collide. Provided.
[0010]
The plate 1 is made of steel and is long in the direction perpendicular to the bridge axis. One plate 1 is plate-shaped and is fixed to a vertical plate 11 and a reinforcing rib 12 provided below, and the other plate 1 is plate-shaped. A horizontal portion 13 and a vertical portion 14 provided on the one plate 1 side are fixed to the reinforcing rib 12 so that one plate 1 covers the horizontal portion 13 of the other plate 1 from above, The two plates 1 and 1 are installed such that a gap is generated between the fingers 2 and 2 of the plates 1 and 1. FIG. 3 is a view showing a state before the intermediate member 3 is installed on the other plate 1. As is apparent from the figure, in this bridge expansion and contraction device, a gap larger than that of the conventional one is generated between the fingers 2 and 2.
[0011]
One plate 1 is firmly fixed to the bridge girders H and H by anchors (not shown). In this fixed state, the upper surface of the plate 1 and the upper surfaces of the bridge girders H and H are substantially flush.
[0012]
The finger 2 of the one plate 1 is formed as a part of the plate 1 and has a substantially trapezoidal shape whose width decreases in the tip direction. The finger 2 of the other plate 1 is provided on the upper surface of the plate 1 and has a triangular shape. In addition, as shown in FIGS. 4 and 5, the finger 2 is configured such that the upper surface of the finger 2 and the upper surface of the one plate 1 are substantially coincident with each other.
[0013]
The intermediate member 3 is made of an elastic material such as rubber and has a zigzag shape so that the intermediate member 3 can be inserted into the gap between the fingers 2 and 2 of both plates 1 and 1. Thus, the upper surface and the upper surface of the one plate 1 are substantially coincided with each other. In this reference embodiment 1, the intermediate member 3 is provided so as to contact the finger 2 of the other plate 1.
[0014]
Since the bridge telescopic device according to the first embodiment is configured as described above, a situation occurs in which the bridge girders H and H move relative to each other in the direction of the bridge axis or the direction perpendicular to the bridge axis (for example, an earthquake). When one finger 2 collides with the intermediate member 3, the intermediate member 3 is in a state where the width of the M-shaped longitudinal section is compressed.
[0015]
That is, when the bridge girders H and H are relatively moved in the direction of the bridge axis, the portion parallel to the bridge axis perpendicular direction of the zigzag intermediate member 3 is compressed, and the bridge girders H and H are relatively moved in the direction perpendicular to the bridge axis. In such a case, the oblique portion of the intermediate member 3 with respect to the direction perpendicular to the bridge axis is compressed. Thereby, the fingers 2 and 2 of both plates 1 and 1 do not directly collide with each other, the impact is reduced, and the relative movement is absorbed.
[0016]
In addition, the intermediate member 3 exists in the gap between the fingers 2 and 2 of the plates 1 and 1 and compensates for a part of the gap, so that there is no problem in passing the vehicle. In the relative movement of the bridge beams H, H caused by the temperature change, the finger 2 and the intermediate member 3 do not collide with each other.
[0017]
In other words, this bridge expansion and contraction device can secure a large gap between the fingers 2 and 2 of both plates 1 and 1, and the bridge girders H and H are relatively moved relative to either the bridge axis direction or the direction perpendicular to the bridge axis. Even in this case, the relative movement can be sufficiently absorbed without being damaged, and the vehicle can travel safely without the wheels being fitted into the gap by the intermediate member 3.
[0018]
Even if the intermediate member 3 is deformed by the collision of the fingers 2, the intermediate member 3 is restored to its original shape again without being damaged. Also, even if the intermediate member 3 is damaged, it can be easily repaired by simply replacing the damaged intermediate member 3 with a new intermediate member 3, and the entire repair work of the bridge expansion and contraction device is not required.
[0019]
(Reference form 2)
As shown in FIG. 6, the bridge telescopic device according to the second embodiment has an N-shaped longitudinal section of the intermediate member 3. As described above, the intermediate member 3 is not limited to an M-shaped longitudinal section, and may be any shape that can be deformed, such as a shape in which a plurality of V-shapes are continuous, such as being compressed when the finger 2 collides. .
[0020]
(Embodiment 1)
As shown in FIGS. 7 and 8, the bridge telescopic device according to the first embodiment fixes the intermediate member 3 in the gap between the fingers 1 and 2 of the plates 1 and 1 on the other plate 1. When a situation occurs in which the bridge girders H and H move relative to each other in the direction of the bridge axis or the direction perpendicular to the bridge axis, the intermediate member 3 is detached when the finger 2 of one plate 1 collides with the intermediate member 3. Is.
[0021]
The intermediate member 3 is formed of steel, concrete, hard rubber or the like, and is fixed to the other plate 1 with a knock pin or the like so as not to be detached by the relative movement of the bridge girders H and H caused by vehicle traffic and temperature changes. I have to. Further, when the intermediate member 3 is detached, the intermediate member 3 is spaced from each of the fingers 2 and 2 of the plates 1 and 1 so that the intermediate member 3 can move in the bridge axis direction and the bridge axis perpendicular direction. Is to occur.
[0022]
By doing in this way, when the bridge girders H and H greatly move in the direction of the bridge axis or the direction perpendicular to the bridge axis due to an earthquake or the like, and one finger 2 collides with the intermediate member 3, the intermediate member 3 is moved onto the other plate 1. And the impact of the collision is absorbed, and both plates 1 and 1 can be relatively moved relative to each other in the direction of the bridge axis or perpendicular to the bridge axis, and the relative movement of the bridge beams H and H is absorbed. The Accordingly, the plate 1 and other bridge members are prevented from being damaged, and can be easily repaired by fixing the separated intermediate member 3 again.
[0023]
In addition, you may coat | cover the part which the finger 2 of the intermediate member 3 collides with rubber | gum. If it does in this way, generation | occurrence | production of the collision sound between fingers can be suppressed.
[0024]
(Embodiment 2)
As shown in FIG. 9, the bridge extension / contraction device according to the second embodiment is configured by fixing the intermediate member 3 in the gap between the fingers 2 and 2 of both plates 1 and 1 as in the first reference embodiment. When the finger 2 of the plate 1 collides, the intermediate member 3 is crushed.
[0025]
The intermediate member 3 is composed of a crushing portion 30 having a vertical M-shaped section made of steel and walls 31 on both sides thereof, and the bridge beams H, H are relative to each other in the direction of the bridge axis or the direction perpendicular to the bridge axis due to an earthquake or the like. When a situation such as movement occurs and the finger 2 of one plate 1 collides with the intermediate member 3, the crushing portion 30 of the intermediate member 3 is in a state where the width of the M-shaped longitudinal section is compressed.
[0026]
The crushing portion 30 is not limited to the above-described shape, and may be any shape that can be crushed when the finger 2 collides, such as an N-shaped longitudinal section or a shape in which a plurality of V-shapes are connected.
[0027]
Thus, if the intermediate member 3 is configured to be crushed by the collision of the finger 2, it is possible to effectively absorb the impact caused by the collision of the finger 2. Therefore, the plate 1 and other bridge members are prevented from being damaged, and can be easily repaired by replacing the crushed intermediate member 3.
[0028]
(Other reference forms and embodiments)
In the above reference embodiment and embodiment, the bridge telescopic device of the present invention is provided between the bridge girders, but the bridge telescopic device of the present invention can also be provided between the bridge girders and the abutment.
[0029]
Further, as shown in FIG. 10, a plurality of intermediate members 3 may be provided. If it does in this way, the clearance gap between the fingers 2 and 2 of both plates 1 and 1 can be enlarged further. As shown in FIG. 11, intermediate members 3 and 3 may be provided so as to abut against the fingers 2 and 2 of both plates 1 and 1, respectively. Furthermore, when the finger 2 of one plate 1 collides with the intermediate member 3, the intermediate member 3 may be crushed and separated.
【The invention's effect】
[0030]
The bridge telescopic device according to the present invention can absorb a large amount of movement in the direction of the bridge axis or the direction perpendicular to the bridge axis, and does not interfere with the passage of the vehicle.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state in which a bridge telescopic device according to a first embodiment of the present invention is installed between bridge girders supported by a bridge pier via a seismic isolation device.
FIG. 2 is a perspective view of the bridge telescopic device.
FIG. 3 is a cross-sectional view showing a state before an intermediate member of the bridge telescopic device is installed.
4 is a sectional view taken along line XX in FIG.
5 is a YY cross-sectional view of FIG. 2;
FIG. 6 is a cross-sectional view of a bridge telescopic device according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a state in which the bridge telescopic device according to the first embodiment of the present invention is installed between bridge girders supported by a bridge pier via a seismic isolation device.
FIG. 8 is a perspective view of a bridge telescopic device according to Embodiment 2 of the present invention.
FIG. 9 is a cross-sectional view of a bridge telescopic device according to Embodiment 2 of the present invention.
FIG. 10 is a plan view showing a case where a plurality of intermediate members are provided.
FIG. 11 is a perspective view showing a case where an intermediate member is provided in contact with the fingers of both plates.
FIG. 12 is a perspective view of a prior art bridge telescopic device.
[Explanation of symbols]
1 plate 2 finger 3 intermediate member

Claims (2)

一方側の橋台又は橋桁と他方側の橋桁の対向する部分にそれぞれ固定されたプレートを具備し、いずれか一方のプレートは他方のプレート側に突出するように橋軸直角方向に複数配列されたフィンガーを有し、他方のプレートは上面に橋軸直角方向に複数配列されたフィンガーを有し、一方のプレートが他方のプレートの一部に被さるようにしていると共に、一方のプレートのフィンガーが、他方のプレートの隣合うフィンガー相互間に遊挿されている橋梁用伸縮装置に於いて、他方のプレート上における両プレートのフィンガー間の隙間に、当該隙間の一部を填補する中間部材を固定してあり、中間部材は、一方のフィンガーとの間に隙間があり、温度変化に起因する橋桁相互の相対移動では、一方のフィンガーが衝突しないため、他方のプレート上から離脱せずに固定されたままであり、地震により橋桁相互が橋軸方向又は橋軸直角方向に大きく相対移動し、一方のフィンガーが衝突したときには、他方のプレート上に固定された状態から離脱するようになっていることを特徴とする橋梁用伸縮装置。  Fingers provided with plates fixed to opposite portions of one side abutment or bridge girder and the other side girder, and a plurality of either plate protruding in the direction perpendicular to the bridge axis so as to protrude to the other plate side And the other plate has a plurality of fingers arranged on the upper surface in a direction perpendicular to the bridge axis so that one plate covers a part of the other plate, and the finger of one plate In the bridge expansion and contraction device that is loosely inserted between adjacent fingers of the plate, an intermediate member that covers a part of the gap is fixed to the gap between the fingers of both plates on the other plate. Yes, the intermediate member has a gap between one finger, and the relative movement between the bridge girders due to temperature changes prevents one finger from colliding with the other. It remains fixed without detaching from the rate, and the bridge girders move greatly relative to each other in the direction of the bridge axis or the direction perpendicular to the bridge due to the earthquake, and when one finger collides, A telescopic device for a bridge characterized by being detached. 一方側の橋台又は橋桁と他方側の橋桁の対向する部分にそれぞれ固定されたプレートを具備し、いずれか一方のプレートは他方のプレート側に突出するように橋軸直角方向に複数配列されたフィンガーを有し、他方のプレートは上面に橋軸直角方向に複数配列されたフィンガーを有し、一方のプレートが他方のプレートの一部に被さるようにしていると共に、一方のプレートのフィンガーが、他方のプレートの隣合うフィンガー相互間に遊挿されている橋梁用伸縮装置に於いて、他方のプレート上における両プレートのフィンガー間の隙間に、当該隙間の一部を填補する中間部材を設けてあり、中間部材は、一方のフィンガーとの間に隙間があり、温度変化に起因する橋桁相互の相対移動では、一方のフィンガーが衝突しないため、他方のプレート上で圧潰せず、地震により橋桁相互が橋軸方向又は橋軸直角方向に大きく相対移動し、一方のフィンガーが衝突したときには、他方のプレート上で圧潰し、圧潰したままになっていることを特徴とする橋梁用伸縮装置。  Fingers provided with plates fixed to opposite portions of one side abutment or bridge girder and the other side girder, and a plurality of either plate protruding in the direction perpendicular to the bridge axis so as to protrude to the other plate side And the other plate has a plurality of fingers arranged on the upper surface in a direction perpendicular to the bridge axis so that one plate covers a part of the other plate, and the finger of one plate In a bridge telescopic device that is loosely inserted between adjacent fingers of a plate, an intermediate member is provided in the gap between the fingers of both plates on the other plate. The intermediate member has a gap between one finger and the relative movement between the bridge girders caused by temperature changes does not cause one finger to collide. The bridge girders move relative to each other in the direction of the bridge axis or perpendicular to the bridge axis due to the earthquake, and when one finger collides, it is crushed on the other plate and remains crushed. A telescopic device for bridges.
JP26432298A 1998-09-18 1998-09-18 Telescopic device for bridge Expired - Fee Related JP3677573B2 (en)

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JP6191369B2 (en) * 2013-10-02 2017-09-06 横浜ゴム株式会社 Telescopic device for road bridge
JP6427347B2 (en) * 2014-07-16 2018-11-21 中外道路株式会社 Road bridge expansion joint
JP6697872B2 (en) * 2015-12-18 2020-05-27 株式会社橋梁メンテナンス Filling material for expansion and contraction equipment for bridges
JP7013755B2 (en) * 2017-09-19 2022-02-01 横浜ゴム株式会社 Stuffed structure for road bridge expansion and contraction device

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