JP6224446B2 - Steel girder reinforcement structure - Google Patents

Steel girder reinforcement structure Download PDF

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JP6224446B2
JP6224446B2 JP2013256670A JP2013256670A JP6224446B2 JP 6224446 B2 JP6224446 B2 JP 6224446B2 JP 2013256670 A JP2013256670 A JP 2013256670A JP 2013256670 A JP2013256670 A JP 2013256670A JP 6224446 B2 JP6224446 B2 JP 6224446B2
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steel girder
pier
steel
girder
reinforcement structure
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JP2015113630A (en
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裕介 小林
裕介 小林
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Railway Technical Research Institute
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Description

この発明は、鋼桁補強構造、特に、橋脚と、橋脚上に支持された鋼桁の対向する端部とを、鉄筋コンクリートにより一体化して、これらを剛結合することにより、鋼桁を強固に補強することが可能な鋼桁補強構造に関するものである。   The present invention provides a steel girder reinforcement structure, in particular, a bridge pier and a steel girder supported on the pier are integrated with reinforced concrete, and the steel girder is strongly reinforced by rigidly connecting them. The present invention relates to a steel girder reinforcement structure that can be used.

近年、使用開始から年月が経過して老朽化が進んでいる鋼鉄道橋における鋼桁の補強工事が急務になっている。   In recent years, there has been an urgent need to reinforce steel girders in steel railway bridges that have been aging since the start of use.

鋼桁補強構造の一例が特許文献1に開示されている。以下、この鋼桁補強構造を従来補強構造といい、図面を参照しながら説明する。   An example of a steel girder reinforcement structure is disclosed in Patent Document 1. Hereinafter, this steel girder reinforcement structure is referred to as a conventional reinforcement structure and will be described with reference to the drawings.

図4は、従来補強構造を示す断面図である。   FIG. 4 is a cross-sectional view showing a conventional reinforcing structure.

図4において、11は、橋脚、12は、鋼桁である。鋼桁12の対向する端部は、支承13を介して橋脚11上に支持されている。14は、橋脚11と、橋脚11上に支持された鋼桁12の対向する端部との周囲に施工された鉄筋コンクリートである。   In FIG. 4, 11 is a bridge pier and 12 is a steel girder. Opposing ends of the steel girder 12 are supported on the pier 11 via a support 13. Reference numeral 14 denotes reinforced concrete constructed around the pier 11 and the opposite ends of the steel girder 12 supported on the pier 11.

鋼桁補強構造によれば、橋脚11と、橋脚11上に支持された鋼桁12の対向する端部とを鉄筋コンクリート14により一体化して、これらを剛結合することにより、老朽化した鋼桁12を補強することができる。   According to the steel girder reinforcement structure, the pier 11 and the opposite ends of the steel girder 12 supported on the pier 11 are integrated by the reinforced concrete 14, and these are rigidly coupled to each other, thereby aging the steel girder 12 Can be reinforced.

特開2006−70614号公報JP 2006-70614 A

上述したように、鋼桁補強構造によれば、橋脚11と、橋脚11上に支持された鋼桁12の対向する端部とを鉄筋コンクリート14により一体化して、これらを剛結合することにより、老朽化した鋼桁12を補強することができるが、上記特許文献1には、鉄筋コンクリート14によりどのようにして橋脚11と、橋脚11上に支持された鋼桁12の対向する端部とを一体化して、これらを剛結合するのか、その具体的な補強構造の開示も示唆もない。   As described above, according to the steel girder reinforcement structure, the bridge pier 11 and the opposite ends of the steel girder 12 supported on the pier 11 are integrated by the reinforced concrete 14 and are rigidly connected to each other. The steel girder 12 can be reinforced. However, in the above-mentioned Patent Document 1, the pier 11 and the opposite ends of the steel girder 12 supported on the pier 11 are integrated by the reinforced concrete 14. Thus, there is no disclosure or suggestion of a specific reinforcing structure for rigidly connecting them.

従って、この発明の目的は、橋脚と、橋脚上に支持された鋼桁の対向する端部とを鉄筋コンクリートにより一体化して、これらを剛結合する際の補強構造を具体化した鋼桁補強構造を提供することにある。   Accordingly, an object of the present invention is to provide a steel girder reinforcing structure that embodies a reinforcing structure when a bridge pier and opposing ends of a steel girder supported on the pier are integrated by reinforced concrete and rigidly connected to each other. It is to provide.

この発明は、上記目的を達成するためになされたものであり、下記を特徴とする。   The present invention has been made to achieve the above object, and is characterized by the following.

請求項1に記載の発明は、橋脚と、橋脚上に支持された鋼桁の対向する端部とを鉄筋コンクリートにより一体化して、これらを剛結合する、既設の鋼桁の補強構造において、前記鋼桁の端部内に、前記鋼桁の軸線と直交して水平に配された鋼桁端部補強用水平アンカーと、前記鋼桁の対向する端部間に配された鋼桁連結用水平アンカーと、前記鋼桁の端部と前記橋脚との間に配された橋脚連結用垂直アンカーと、前記鋼桁の端部内に打設された鉄筋コンクリートとからなることを特徴とする鋼桁補強構造。 The invention according to claim 1 is an existing steel girder reinforcement structure in which a bridge pier and opposite ends of a steel girder supported on the pier are integrated by reinforced concrete and rigidly connected to each other . A horizontal anchor for reinforcing a steel girder end disposed horizontally in an end of the girder and perpendicular to the axis of the steel girder, and a horizontal anchor for connecting a steel girder disposed between opposing ends of the steel girder A steel girder reinforcement structure comprising a vertical anchor for connecting a pier arranged between an end of the steel girder and the pier, and reinforced concrete placed in the end of the steel girder.

請求項2に記載の発明は、請求項1に記載の発明において、前記鋼桁は、一対のI形の桁部材を平行に連結したものからなり、前記鋼桁端部補強用水平アンカーは、前記一対の桁部材のウェブを貫通して配されていることに特徴を有するものである。   The invention according to claim 2 is the invention according to claim 1, wherein the steel girder is formed by connecting a pair of I-shaped girder members in parallel, and the horizontal anchor for reinforcing the end of the steel girder is: It is characterized by being arranged through the web of the pair of beam members.

この発明によれば、鋼桁端部補強用水平アンカーと、鋼桁連結用水平アンカーと、橋脚連結用垂直アンカーとを設け、鋼桁の端部内に鉄筋コンクリートを打設して、橋脚と、橋脚上に支持された鋼桁の対向する端部とを一体化することによって、これらが剛結合されるので、鋼桁を強固に補強することができる。   According to this invention, a horizontal anchor for reinforcing a steel girder end, a horizontal anchor for connecting a steel girder, and a vertical anchor for connecting a pier are provided, and reinforced concrete is placed in the end of the steel girder, and the pier, By integrating the opposing ends of the steel girders supported above, they are rigidly coupled, so that the steel girders can be reinforced strongly.

この発明の鋼桁補強構造を示す断面図である。It is sectional drawing which shows the steel girder reinforcement structure of this invention. 図1のA−A線断面図である。It is the sectional view on the AA line of FIG. この発明の別の鋼桁補強構造を示す断面図である。It is sectional drawing which shows another steel girder reinforcement structure of this invention. 従来補強構造を示す断面図である。It is sectional drawing which shows the conventional reinforcement structure.

この発明の鋼桁補強構造の一実施形態を、図面を参照しながら説明する。   An embodiment of a steel girder reinforcing structure of the present invention will be described with reference to the drawings.

図1は、この発明の鋼桁補強構造を示す断面図、図2は、図1のA−A線断面図である。   FIG. 1 is a cross-sectional view showing a steel girder reinforcing structure of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

図1および図2において、1は、橋脚、2は、鋼桁である。鋼桁2の端部は、橋脚1上に支承3を介して対向して支持されている。鋼桁2は、一対のI形の桁部材4を連結部材(図示せず)により平行に連結したものからなっている。桁部材4は、H形鋼、I形鋼、平鋼板をI形断面になるように溶接したもの、あるいは、平鋼板やくの字状の形鋼をI形断面になるように溶接したものなどからなっている。   1 and 2, 1 is a bridge pier and 2 is a steel girder. The ends of the steel girders 2 are supported on the pier 1 so as to face each other via a support 3. The steel girder 2 is composed of a pair of I-shaped girder members 4 connected in parallel by a connecting member (not shown). The girder member 4 is an H-shaped steel, an I-shaped steel, a flat steel plate welded to have an I-shaped cross section, or a flat steel plate or a square-shaped shaped steel welded to have an I-shaped cross section. It is made up of.

5は、ループ状の鋼製の鋼桁端部補強用水平アンカーであり、一対の桁部材4の端部のウェブ6を貫通し、桁部材4の軸線と直交して水平に複数本、上下2段に配されている。   5 is a horizontal anchor for reinforcing a steel girder end of a loop-shaped steel, penetrates the web 6 at the end of a pair of girder members 4, and is vertically aligned with a plurality of horizontal and perpendicular to the axis of the girder member 4. Arranged in two stages.

7は、鋼桁1の対向する端部間に上下2段に配された複数本の鋼製の鋼桁連結用水平アンカーである。8は、鋼桁2の端部と橋脚1との間に配された複数本の鋼製の橋脚連結用垂直アンカーである。   Reference numeral 7 denotes a plurality of steel steel girder horizontal anchors arranged in two upper and lower stages between opposing ends of the steel girder 1. Reference numeral 8 denotes a plurality of steel pier connecting vertical anchors arranged between the end of the steel beam 2 and the pier 1.

9は、鋼桁2の端部内に打設された鉄筋コンクリート(鉄筋は、図示せず)である。   9 is a reinforced concrete (rebar not shown) cast in the end of the steel girder 2.

このように、鋼桁端部補強用水平アンカー5と、鋼桁連結用水平アンカー7と、橋脚連結用垂直アンカー8とを設け、鋼桁2の端部内に鉄筋コンクリート9を打設することによって、橋脚1と、橋脚1上に支持された鋼桁2の対向する端部とを一体化することができるので、橋脚1と鋼桁2の対向する端部とが剛結合される。この結果、鋼桁2を強固に補強することができる。   Thus, by providing the horizontal anchor 5 for reinforcing the end of the steel beam, the horizontal anchor 7 for connecting the steel beam, and the vertical anchor 8 for connecting the pier, and placing the reinforced concrete 9 in the end of the steel beam 2, Since the pier 1 and the opposing end of the steel girder 2 supported on the pier 1 can be integrated, the pier 1 and the opposing end of the steel girder 2 are rigidly coupled. As a result, the steel girder 2 can be reinforced strongly.

なお、図4に示すように、橋脚1と鋼桁2の端部との間に頬杖10を設ければ、鋼桁2をさらに強固に補強することができる。   In addition, as shown in FIG. 4, if the cheek stick 10 is provided between the pier 1 and the edge part of the steel beam 2, the steel beam 2 can be reinforced more firmly.

以上、説明したように、この発明によれば、鋼桁端部補強用水平アンカーと、鋼桁連結用水平アンカーと、橋脚連結用垂直アンカーとを設け、鋼桁の端部内に鉄筋コンクリートを打設することによって、橋脚と、橋脚上に支持された鋼桁の対向する端部とが一体化され、この結果、橋脚と鋼桁の端部とが剛結合されるので、鋼桁を強固に補強することができる。   As described above, according to the present invention, the steel girder end reinforcing horizontal anchor, the steel girder connecting horizontal anchor, and the pier connecting vertical anchor are provided, and the reinforced concrete is placed in the end of the steel girder. By doing so, the pier and the opposite end of the steel girder supported on the pier are integrated, and as a result, the pier and the end of the steel girder are rigidly connected, so the steel girder is reinforced strongly can do.

1:橋脚
2:鋼桁
3:支承
4:桁部材
5:鋼桁端部補強用水平アンカー
6:ウェブ
7:鋼桁連結用水平アンカー
8:橋脚連結用垂直アンカー
9:鉄筋コンクリート
10:頬杖
11:橋脚
12:鋼桁
13:支承
14:鉄筋コンクリート
1: bridge pier 2: steel girder 3: support 4: girder member 5: horizontal anchor for reinforcing the end of steel girder 6: web 7: horizontal anchor for steel girder connection 8: vertical anchor for pier connection 9: reinforced concrete 10: cheek cane 11: Pier 12: Steel girder 13: Bearing 14: Reinforced concrete

Claims (2)

橋脚と、橋脚上に支持された鋼桁の対向する端部とを鉄筋コンクリートにより一体化して、これらを剛結合する、既設の鋼桁の補強構造において、
前記鋼桁の端部内に、前記鋼桁の軸線と直交して水平に配された鋼桁端部補強用水平アンカーと、前記鋼桁の対向する端部間に配された鋼桁連結用水平アンカーと、前記鋼桁の端部と前記橋脚との間に配された橋脚連結用垂直アンカーと、前記鋼桁の端部内に打設された鉄筋コンクリートとからなることを特徴とする鋼桁補強構造。
In the reinforcement structure of the existing steel girder, where the pier and the opposite ends of the steel girder supported on the pier are integrated by reinforced concrete and these are rigidly connected,
In the end of the steel girder, a horizontal anchor for reinforcing a steel girder end horizontally disposed perpendicular to the axis of the steel girder, and a horizontal for connecting the steel girder disposed between opposite ends of the steel girder A steel girder reinforcing structure comprising an anchor, a vertical anchor for connecting a pier arranged between an end of the steel girder and the pier, and reinforced concrete placed in the end of the steel girder .
前記鋼桁は、一対のI形の桁部材を平行に連結したものからなり、前記鋼桁端部補強用水平アンカーは、前記一対の桁部材のウェブを貫通して配されていることを特徴とする、請求項1に記載の鋼桁補強構造。   The steel girder is formed by connecting a pair of I-shaped girder members in parallel, and the horizontal anchor for reinforcing the end of the steel girder is disposed through the web of the pair of girder members. The steel girder reinforcement structure according to claim 1.
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