JP2005314866A - Bending recovering reinforcing construction method for existing bridge by bottom chord cable - Google Patents

Bending recovering reinforcing construction method for existing bridge by bottom chord cable Download PDF

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JP2005314866A
JP2005314866A JP2004120951A JP2004120951A JP2005314866A JP 2005314866 A JP2005314866 A JP 2005314866A JP 2004120951 A JP2004120951 A JP 2004120951A JP 2004120951 A JP2004120951 A JP 2004120951A JP 2005314866 A JP2005314866 A JP 2005314866A
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bridge
cable
strut
supporting
bending
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JP3865742B2 (en
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Takeshi Suzuki
威 鈴木
Shigeru Matsumoto
茂 松本
Hidenori Manabe
英規 真鍋
Hiroshi Nishi
弘 西
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Fuji PS Corp
Hanshin Expressway Public Corp
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Fuji PS Corp
Hanshin Expressway Public Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bending recovering reinforcing construction method for an existing bridge for recovering a sunk and bent part of the bridge hanging down in a V shape to lift it in a plane. <P>SOLUTION: In the bridge 1 stretched and provided by supporting a section between concrete bridge girders 2 and 2 and connecting them by hinge connection in a plurality of sections in the direction of width of the bridge girders 2, 2, a strut 6 is attached to a lower side of the sunk and bent part 5 hanging down in the V shape between the bridge girders 2 and 2 while nipping the sunk and bent part 5 from the direction of length of the bridge girders 2, 2, a rubber-made cushioning material 13 is set inside each hinge connection part 3, and a bottom chord cable 8 stretched between bridge piers 4 and 4 supporting the bridge girders 2, 2 causing hanging-down is inserted into a connection part 6c whose inside positioned at a lower end of the strut 6 is a cavity. The bottom chord cable 8 is tightly stretched by a jack for tightening on both bridge pier 4, 4 sides supporting the bridge girders 2, 2 causing hanging-down, and the sunk and bent part 5 is lifted through the strut 6 for recovery. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、特に高速道路などの高架橋の繋ぎ部に生じる沈下撓み部を補修し、橋梁の耐荷力の向上を図るための下弦ケーブルによる既設橋梁の撓み回復補強工法に関するものである。   The present invention relates to a method for restoring and reinforcing the bending of an existing bridge using a lower string cable in order to repair a subsidence bending portion generated in a connecting portion of a viaduct such as an expressway and to improve the load resistance of the bridge.

従来から特許文献１に開示されているように橋桁間をヒンジ支承により結合する工法が知られている。
この特許文献１に開示されているヒンジ支承は、相対峙する橋桁などの一方の片持ばりの端部には該片持ばりの鉛直方向に相対向する脚部を備えた縦断面概略コの字状のメスヒンジが設けられており、他方の片持ばりの端部には該メスヒンジに嵌合するボス部と基部を備えた縦断面概略Ｔの字状のオスヒンジが設けられており、前記両片持ばりの端部を連結支持するヒンジ支承において、前記メスヒンジの脚部内面に相対応するオスヒンジのボス部側面には該ボス部の軸線に直交する凹溝が設けられており、該凹溝には調整片が配されており、該メスヒンジの脚部内面とボス部側面間には該凹溝を含んで可動当接面部が構成されており、該可動当接面部は前記凹溝内に配された調整片を介して該凹溝に配された摺接片と一方の面に該摺接片と摺接する平面を有し、他方の面に凸曲面を有するベアリングプレートと該凹溝と相対向する脚部内面に固定され該ベアリングプレートの凸曲面と摺接する凹曲面を有する受け板とを包含してなるものである。
特公昭５８−２５１２２号公報 Conventionally, as disclosed in Patent Document 1, a method of connecting bridge girders by hinge support is known.
The hinge support disclosed in this Patent Document 1 has a vertical cross-section with a substantially opposite leg portion in the vertical direction of the cantilever at the end of one cantilever such as a bridge girder that faces each other. A character-shaped female hinge is provided, and an end of the other cantilever is provided with a male hinge having a T-shaped vertical section having a boss portion and a base portion fitted to the female hinge. In the hinge support for connecting and supporting the end portion of the cantilever, a concave groove perpendicular to the axis of the boss portion is provided on the side surface of the male hinge corresponding to the inner surface of the leg portion of the female hinge. An adjustment piece is disposed on the inner surface of the female hinge, and a movable contact surface portion is formed between the leg inner surface and the boss side surface of the female hinge. The movable contact surface portion is formed in the groove. A sliding contact piece arranged in the concave groove via an adjustment piece arranged on the one side and the sliding contact piece on one surface Including a bearing plate having a flat surface in contact with a convex curved surface on the other surface and a receiving plate having a concave curved surface fixed to the inner surface of the leg opposite to the concave groove and in sliding contact with the convex curved surface of the bearing plate It will be.
Japanese Examined Patent Publication No. 58-25122

この特許文献１に開示されている橋桁間をヒンジ支承により結合する工法により架設された橋梁にあっては長年の使用によりヒンジ結合部がＶ状に垂れ下がって撓み、車両の走行性や橋面排水において問題が生じているのが現状である。   In a bridge constructed by a construction method in which bridge girders disclosed in Patent Document 1 are coupled by a hinge support, the hinge coupling portion hangs in a V-shape and is bent over many years. There is a problem at present.

本発明の目的は、このような課題を解決するものであり、Ｖ状に垂れ下がった橋梁の沈下撓み部を平面状に持ち上げるように回復させて既設橋梁を補強する下弦ケーブルによる既設橋梁の撓み回復補強工法を提供することにある。   An object of the present invention is to solve such a problem, and to recover the bending of an existing bridge by a lower chord cable that reinforces the existing bridge by restoring the sinking bending portion of the bridge hanging in a V shape so as to be lifted in a planar shape. The purpose is to provide a reinforcement method.

本発明の請求項１に記載の下弦ケーブルによる既設橋梁の撓み回復補強工法は、コンクリート製の橋桁間を橋桁の幅方向複数箇所においてヒンジ結合により支持連結して架設された橋梁において、橋桁間のＶ状の垂れ下がり沈下撓み部の下側に沈下撓み部を橋桁の長さ方向から挟む状態でストラットを取り付けるとともに、各ヒンジ結合部の内部にゴム製の緩衝材をセットしておき、前記垂れ下がりが生じている橋桁を支持している橋脚間に張設される下弦ケーブルを前記ストラットの下端に位置する内部が空洞の連結部に挿通させ、垂れ下がりが生じている橋桁を支持している両橋脚側で緊張用ジャッキにより下弦ケーブルを緊張させることによりストラットを介して前記沈下撓み部を持ち上げ、回復させることを特徴とする。   According to the first aspect of the present invention, the bending recovery and reinforcement method for the existing bridge using the lower chord cable is a bridge constructed by supporting and connecting between concrete bridge girders by hinge connection at a plurality of positions in the width direction of the bridge girder. A strut is attached to the lower side of the V-shaped sagging deflection section with the sagging deflection section sandwiched from the length direction of the bridge girder, and a rubber cushioning material is set inside each hinge coupling section. Both piers supporting the bridge girder supporting the bridge girder in which the inside of the strut located at the lower end of the strut is inserted into the connecting portion of the hollow, and the lower string cable stretched between the piers supporting the generated bridge girder is inserted. Then, the lower string cable is tensioned by a tensioning jack to lift and recover the subsidence bending portion via the strut.

請求項２に記載の下弦ケーブルによる既設橋梁の撓み回復補強工法は、橋脚とストラットとの間の複数箇所において下弦ケーブルを支持する制振装置を橋桁の下面に取り付けることを特徴とする。   According to a second aspect of the present invention, a method for restoring and reinforcing the bending of an existing bridge using a lower string cable is characterized in that a vibration damping device that supports the lower string cable is attached to the lower surface of the bridge girder at a plurality of locations between the bridge pier and the strut.

以上のように、本発明の下弦ケーブルによる既設橋梁の撓み回復補強工法は、垂れ下がりが生じている橋桁を支持している両橋脚側で緊張用ジャッキにより下弦ケーブルを緊張させることによりストラットを介して沈下撓み部を持ち上げることによって、沈下深さを可能な限り浅く回復させることができ、この下弦ケーブルの緊張を維持しておくことにより橋桁間の垂れ下がり沈下を防止し、橋梁の耐荷力の向上を図ることができる。また、橋脚とストラットとの間の複数箇所において下弦ケーブルを支持する制振装置を設けることにより、橋桁からの振動が下弦ケーブルに伝わって下弦ケーブルが上下に振動するのを止めることができる。   As described above, the bending recovery and reinforcement method of the existing bridge using the lower string cable of the present invention is performed via the strut by tensioning the lower string cable with the tensioning jacks on the both pier side supporting the bridge girder in which the drooping occurs. By lifting the subsidence flexure, the subsidence depth can be restored as shallow as possible. By maintaining the tension of this lower chord cable, drooping subsidence between bridge girders can be prevented and the load bearing capacity of the bridge can be improved. Can be planned. Further, by providing a vibration damping device that supports the lower string cable at a plurality of locations between the pier and the strut, it is possible to stop the vibration of the bridge string from being transmitted to the lower string cable and the vertical vibration of the lower string cable.

以下、本発明の一実施の形態を、図１〜図５に基づいて説明する。
図において、１はコンクリート製の橋桁２，２間を橋桁２，２の幅方向複数箇所においてヒンジ結合により支持連結して架設された橋梁であり、３はそのヒンジ結合部、４は橋脚である。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
In the figure, 1 is a bridge constructed by supporting and connecting concrete bridge girders 2 and 2 by hinge coupling at a plurality of positions in the width direction of the bridge girders 2 and 2, 3 is a hinge coupling portion thereof, and 4 is a bridge pier. .

前記ヒンジ結合部３としては例えば前記特許文献１に記載されているようなヒンジ支承を利用することにより橋桁２，２間を連結するものであるが、このヒンジ支承に限定されるものではない。   As the hinge coupling part 3, for example, a bridge support as described in Patent Document 1 is used to connect the bridge beams 2 and 2, but the hinge connection part 3 is not limited to this hinge support.

前記ヒンジ結合部３は前記従来の背景技術でも述べた構成を備えていることから、長年の使用によりヒンジ結合部３がＶ状に垂れ下がるという問題が発生し、このＶ状に垂れ下がった橋梁の沈下撓み部５を以下に述べる工法で回復補強させるのである。   Since the hinge coupling portion 3 has the configuration described in the background art, the problem that the hinge coupling portion 3 hangs down in a V shape occurs due to long-term use, and the bridge sinks in the V shape. The flexure 5 is recovered and reinforced by the method described below.

先ず、垂れ下がりが生じている橋桁２，２間の沈下撓み部５を橋桁２，２の長さ方向から挟む位置で沈下撓み部５の下側にストラット６が取り付けられる。ストラット６は４本の脚部６ａと、この４本の脚部６ａを上下方向中間部において互いに繋ぐ連結部６ｂと、さらにこの４本の脚部６ａの内、前側に位置する２本の脚部６ａ同士および後側に位置する２本の脚部６ａ同士を下端部において繋ぐ左右方向に向く前後の連結部６ｃ，６ｃと、この前後の連結部６ｃ，６ｃ間を繋ぐ前後方向に向く３本の連結部６ｄとを備え、前記４本の脚部６ａの上端に設けた取り付けプレート６ｅを前記橋桁２の下面にケミカルアンカーやボルトなどの固定手段７により固定し、また前記前後の連結部６ｃ，６ｃの内部を空洞とし、連結部６ｃ，６ｃの内部に下弦ケーブル８を挿通するように構成されている。   First, the strut 6 is attached to the lower side of the subsidence bending part 5 at a position where the subsidence bending part 5 between the bridge girders 2 and 2 where the sagging occurs is sandwiched from the length direction of the bridge girders 2 and 2. The strut 6 includes four leg portions 6a, a connecting portion 6b that connects the four leg portions 6a to each other at an intermediate portion in the vertical direction, and two legs located on the front side of the four leg portions 6a. Front and rear connecting parts 6c, 6c that connect the parts 6a and the two leg parts 6a positioned on the rear side at the lower end, and a front-rear direction that connects the front and rear connecting parts 6c, 6c 3 A connecting plate 6e provided on the upper ends of the four leg portions 6a and fixed to the lower surface of the bridge girder 2 by a fixing means 7 such as a chemical anchor or a bolt, and the front and rear connecting portions. The inside of 6c, 6c is made into a cavity, and the lower chord cable 8 is inserted into the inside of the connecting portions 6c, 6c.

下弦ケーブル８は前記垂れ下がりが生じている橋桁２，２を支持している橋脚４，４間に２本張設されるものであるが、その張設作業について説明する。
一方の橋脚４側から他方の橋脚４側に下弦ケーブル８を導くに際し、一方の橋脚４側の下弦ケーブル挿通孔４ａに挿通した下弦ケーブル８の一端を、他方の橋脚４側のウインチから下弦ケーブル挿通孔４ａを通って繰り出され前記連結部６ｃ，６ｃに挿通されて一方の橋脚４側まで引き出されたワイヤーに接続してウインチを駆動させてワイヤーを巻き上げることにより下弦ケーブル８の一端を他方の橋脚４側に導き、緊張用ジャッキにより両方の橋脚４側で下弦ケーブル８を緊張させる。この下弦ケーブル８の緊張により前記ストラット６を介して前記沈下撓み部５を持ち上げ、沈下深さが可能な限り浅くなるように回復させるのである。両橋脚４，４間で緊張された下弦ケーブル８の端部はそれぞれ両橋脚４，４に支持されて緊張状態を保持するようになっている。 Two lower chord cables 8 are stretched between the bridge piers 4 and 4 supporting the bridge girders 2 and 2 in which the above-mentioned drooping occurs.
When the lower string cable 8 is guided from one pier 4 side to the other pier 4 side, one end of the lower string cable 8 inserted into the lower string cable insertion hole 4a on one pier 4 side is connected to the lower string cable from the winch on the other pier 4 side. One end of the lower chord cable 8 is wound up by driving the winch by winding the wire through the insertion hole 4a, being inserted into the connecting portions 6c, 6c and being drawn out to the one pier 4 side. The pierced cable 8 is guided to the pier 4 side, and the lower string cable 8 is tensed on both pier 4 sides by a tensioning jack. The tension of the lower chord cable 8 lifts the subsidence bending portion 5 via the strut 6 and recovers the subsidence depth as shallow as possible. The ends of the lower chord cable 8 that are tensioned between the two piers 4 and 4 are supported by the two piers 4 and 4 so as to maintain the tension state.

ところで、この下弦ケーブル８の張設に際し、橋脚４とストラット６との間の距離が長いと橋脚４とストラット６との間で下弦ケーブル８に橋桁２からの振動が伝わり下弦ケーブル８が上下に振動する恐れがあるので、この振動を抑制するために橋脚４とストラット６との間において下弦ケーブル８を支持する制振装置９が設けられる。この制振装置９は、下端のＵ字ボルト１０ａとその上端に接続される連結用プレート１０ｂとからなる下弦ケーブル支持部材１０と、この下弦ケーブル支持部材１０の連結用プレート１０ｂの両端に下端を接続して下弦ケーブル支持部材１０を吊り下げる吊り下げプレート１１とからなり、吊り下げプレート１１の上端を橋桁２の下面にケミカルアンカーやボルトなどの固定手段１２により固定するように構成されている。なお、この制振装置９を橋梁１の長さ方向に複数設ける場合、前記ストラット６側に位置する制振装置９の方が下弦ケーブル支持部材１０の高さ位置が下側となるように設計されている。   By the way, when the lower string cable 8 is stretched, if the distance between the pier 4 and the strut 6 is long, the vibration from the bridge girder 2 is transmitted to the lower string cable 8 between the pier 4 and the strut 6 and the lower string cable 8 is moved up and down. Since there is a possibility of vibration, a vibration damping device 9 for supporting the lower string cable 8 is provided between the bridge pier 4 and the strut 6 in order to suppress this vibration. The vibration damping device 9 has a lower string cable support member 10 including a U-shaped bolt 10a at the lower end and a connection plate 10b connected to the upper end thereof, and lower ends at both ends of the connection plate 10b of the lower string cable support member 10. The suspension plate 11 is connected to and suspended from the lower string cable support member 10. The upper end of the suspension plate 11 is fixed to the lower surface of the bridge girder 2 by a fixing means 12 such as a chemical anchor or a bolt. When a plurality of damping devices 9 are provided in the length direction of the bridge 1, the damping device 9 located on the strut 6 side is designed so that the height position of the lower chord cable support member 10 is on the lower side. Has been.

前述のように下弦ケーブル８の緊張により前記ストラット６を介して前記沈下撓み部５を持ち上げることにより前記ヒンジ結合部３における隙間（遊び）が無くなるので、これに対処すべくヒンジ結合部３の内部に予めゴム製の緩衝材１３をセットしておき、橋桁２，２間に伸縮性を持たせている。   As described above, the clearance (play) in the hinge coupling portion 3 is eliminated by lifting the subsidence bending portion 5 through the strut 6 due to the tension of the lower chord cable 8, so that the inside of the hinge coupling portion 3 can be dealt with. A rubber cushioning material 13 is set in advance to give stretchability between the bridge beams 2 and 2.

下弦ケーブル８を緊張させて沈下撓み部５を持ち上げる作業が完了すると、最終的には橋桁２，２間の沈下が残っている部分にコンクリートを埋めるなどの方法によりフラットな状態にする。   When the operation of lifting the subsidence bending portion 5 by tensioning the lower chord cable 8 is completed, the flat state is finally obtained by, for example, embedding concrete in a portion where the subsidence between the bridge girders 2 and 2 remains.

なお、本実施の形態において橋桁２，２間に使用されるヒンジ結合部３としては例えば前記特許文献１に記載されているようなヒンジ支承を利用すると説明したが、ヒンジ結合部３の構成はこれに限定されるものではない。   In the present embodiment, the hinge coupling portion 3 used between the bridge girders 2 and 2 has been described as using a hinge support as described in Patent Document 1, for example, but the configuration of the hinge coupling portion 3 is as follows. It is not limited to this.

本発明の一実施の形態において橋桁間の沈下撓み部の下側にストラットを取り付けた状態を示す正面図である。It is a front view which shows the state which attached the strut to the lower side of the settlement bending part between bridge girders in one embodiment of this invention. 同沈下撓み部を下弦ケーブルにより持ち上げた状態を示す正面図である。It is a front view which shows the state which raised the sinking bending part with the lower string cable. 同沈下撓み部を持ち上げた下弦ケーブルの適所に制振装置を取り付けた状態を示す正面図である。It is a front view which shows the state which attached the damping device in the appropriate place of the lower string cable which lifted the sinking bending part. 同ストラットの斜視図である。It is a perspective view of the strut. 同制振装置の斜視図である。It is a perspective view of the vibration damping device.

符号の説明Explanation of symbols

１ 橋梁
２ 橋桁
３ ヒンジ結合部
４ 橋脚
４ａ 下弦ケーブル挿通孔
５ 沈下撓み部
６ ストラット
６ａ 脚部
６ｂ，６ｃ，６ｄ 連結部
６ｅ 取り付けプレート
７ 固定手段
８ 下弦ケーブル
９ 制振装置
１０ 下弦ケーブル支持部材
１０ａ Ｕ字ボルト
１０ｂ 連結用プレート
１１ 吊り下げプレート
１２ 固定手段
１３ 緩衝材 DESCRIPTION OF SYMBOLS 1 Bridge 2 Bridge girder 3 Hinge coupling part 4 Bridge pier 4a Lower string cable insertion hole 5 Subsidence bending part 6 Strut 6a Leg part 6b, 6c, 6d Connection part 6e Mounting plate 7 Fixing means 8 Lower string cable 9 Damping device 10 Lower string cable support member 10a U-bolt 10b connecting plate 11 hanging plate 12 fixing means 13 cushioning material

Claims (2)

コンクリート製の橋桁間を橋桁の幅方向複数箇所においてヒンジ結合により支持連結して架設された橋梁において、橋桁間のＶ状の垂れ下がり沈下撓み部の下側に沈下撓み部を橋桁の長さ方向から挟む状態でストラットを取り付けるとともに、各ヒンジ結合部の内部にゴム製の緩衝材をセットしておき、前記垂れ下がりが生じている橋桁を支持している橋脚間に張設される下弦ケーブルを前記ストラットの下端に位置する内部が空洞の連結部に挿通させ、垂れ下がりが生じている橋桁を支持している両橋脚側で緊張用ジャッキにより下弦ケーブルを緊張させることによりストラットを介して前記沈下撓み部を持ち上げ、回復させることを特徴とする下弦ケーブルによる既設橋梁の撓み回復補強工法。 In bridges constructed by supporting and connecting concrete bridge girders at multiple locations in the width direction of the bridge girder by hinge connection, the subsidence deflection part is located below the V-shaped sagging deflection part between the bridge girder from the length direction of the bridge girder. The struts are attached in a sandwiched state, and a rubber cushioning material is set inside each hinge coupling portion, and a lower string cable stretched between the piers supporting the bridge girder where the sag is generated is attached to the struts. The inside located at the lower end of the cable is inserted into the connecting part of the cavity, and the subsidence bending part is inserted through the strut by tensioning the lower string cable with a tensioning jack on the both pier side supporting the bridge girder where the sag occurs. Bending recovery method of existing bridge with lower string cable, characterized by lifting and recovering. 橋脚とストラットとの間の複数箇所において下弦ケーブルを支持する制振装置を橋桁の下面に取り付けることを特徴とする請求項１記載の下弦ケーブルによる既設橋梁の撓み回復補強工法。 2. The bending recovery and reinforcement method for an existing bridge using a lower string cable according to claim 1, wherein a vibration damping device for supporting the lower string cable at a plurality of locations between the bridge pier and the strut is attached to the lower surface of the bridge girder.
JP2004120951A 2004-03-30 2004-04-16 Deflection recovery reinforcement method for existing bridge with lower string cable Expired - Fee Related JP3865742B2 (en)

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KR100733004B1 (en) 2007-03-26 2007-06-28 주식회사 다린이앤씨 Structure of flap prevent of bridge upper part institution
CN102251469A (en) * 2011-04-18 2011-11-23 深圳大学 Fall prevention device for bridge
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JP2014051884A (en) * 2013-12-19 2014-03-20 East Japan Railway Co Mounting structure for dynamic vibration absorber
CN105113430A (en) * 2015-09-17 2015-12-02 四川成都绕城（东段）高速公路有限责任公司 Maintenance and reinforcement method for hinge joints of simply supported slabs and beams
CN109868725A (en) * 2019-04-04 2019-06-11 同济大学建筑设计研究院(集团)有限公司 A kind of spanning component of the two-fold linear foot bridge beam of empty stomach
CN109868725B (en) * 2019-04-04 2024-03-22 同济大学建筑设计研究院(集团)有限公司 Bridge span assembly of hollow double-fold-line pedestrian bridge
CN112575674A (en) * 2020-12-16 2021-03-30 石家庄铁道大学 Combined multistage three-dimensional anti-seismic bridge limiting device based on BRB technology
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CN114263204A (en) * 2021-12-22 2022-04-01 中铁三局集团建筑安装工程有限公司 Large-thickness continuous seamless casting concrete bottom plate and construction method thereof
CN114263204B (en) * 2021-12-22 2022-12-13 中铁三局集团建筑安装工程有限公司 Large-thickness continuous seamless casting concrete bottom plate and construction method thereof

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