JP4537906B2 - Junction structure between bridge pier and girder, bridge construction method and bridge - Google Patents

Junction structure between bridge pier and girder, bridge construction method and bridge Download PDF

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JP4537906B2
JP4537906B2 JP2005221539A JP2005221539A JP4537906B2 JP 4537906 B2 JP4537906 B2 JP 4537906B2 JP 2005221539 A JP2005221539 A JP 2005221539A JP 2005221539 A JP2005221539 A JP 2005221539A JP 4537906 B2 JP4537906 B2 JP 4537906B2
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pier
bridge
girder
concrete
main
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JP2007032232A (en
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雄司 赤坂
夏生 原
卓 松林
明弘 上村
恭太郎 神田
拓志 熊野
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JFE Engineering Corp
Maeda Corp
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Maeda Corp
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Description

本発明は、橋脚と横桁との接合構造、橋の建設方法及び橋に関する。 The present invention relates to a joint structure between a bridge pier and a cross girder , a bridge construction method, and a bridge .

鉄骨コンクリート橋脚として、フランジ外面に横節を設けた突起付きH型鋼の周囲に定着補強鉄筋を配置し、突起付きH型鋼の上部を残してコンクリートに埋設した構造が知られている。また、橋桁と橋脚との接合構造として、例えば以下に説明するものがある。   As a steel-concrete bridge pier, a structure is known in which anchor reinforcement reinforcing bars are arranged around a H-shaped steel with protrusions provided with lateral nodes on the outer surface of the flange, and embedded in the concrete leaving the top of the H-shaped steel with protrusions. Moreover, there exists what is demonstrated below as a junction structure of a bridge girder and a bridge pier, for example.

すなわち、橋桁を構成する２つの主桁を橋脚の上部に載置し、この２つの主桁を複数の連結鋼板で連結し、連結鋼板同士の間を複数の鋼板で仕切ってセル室を設ける。次いで、橋脚の上部から突出する鉄骨を１本ずつ各セル室に挿入し、セル室内にコンクリートを充填する。以上により、橋脚と主桁とを剛結する（例えば、特許文献１参照）。
特開２００４−２０４６０２号公報 That is, two main girders constituting the bridge girder are placed on the upper part of the pier, the two main girders are connected by a plurality of connecting steel plates, and the connecting steel plates are partitioned by a plurality of steel plates to provide a cell chamber. Next, steel frames protruding from the upper part of the pier are inserted into each cell chamber one by one, and the cell chamber is filled with concrete. By the above, a bridge pier and a main girder are rigidly connected (for example, refer to patent documents 1).
JP 2004-204602 A

しかし、上記の接合構造では、個々のセル室が狭隘であるため、この中にスタッドや配筋を設けるための溶接作業等が困難であった。   However, since the individual cell chambers are narrow in the above-described joining structure, it is difficult to perform a welding operation or the like for providing studs and reinforcing bars therein.

本発明の課題は、施工容易な橋脚と横桁との接合構造を提供することである。   The subject of this invention is providing the junction structure of a bridge pier and a cross beam which are easy to construct.

以上の課題を解決するため、請求項１に記載の発明は、例えば図１８に示すように、橋脚３０と横桁１０との接合構造において、前記橋脚３０は上部から複数の鉄骨３１の上端部が突設された鉄骨鉄筋コンクリートからなり、前記横桁１０は平行に配列された複数の主桁１１と、隣り合う主桁１１同士を接続する横板１４とにより枠状に形成され、その内部空間は主桁及び横板により複数のセル室２１，２２に仕切られ、少なくとも１つのセル室２１内には、前記鉄骨３１の数本が挿入され、内部にコンクリートが充填され、前記主桁１１及び横板１４の下部には、前記鉄骨が挿入される挿入口１２ａを有する底板１２が設けられるとともに、前記底板１２の下部には前記橋脚３０の上端の外周面に沿って配置される環状板１８が設けられていることを特徴とする橋脚と横桁との接合構造である。 In order to solve the above-mentioned problems, the invention according to claim 1 is a structure in which a bridge pier 30 and a cross beam 10 are joined, for example, as shown in FIG. The cross beam 10 is formed in a frame shape by a plurality of main beams 11 arranged in parallel and a horizontal plate 14 connecting adjacent main beams 11 to each other. Is divided into a plurality of cell chambers 21 and 22 by a main girder and a horizontal plate. In at least one cell chamber 21, several steel frames 31 are inserted and filled with concrete, and the main girder 11 and A bottom plate 12 having an insertion port 12a into which the steel frame is inserted is provided at the lower portion of the horizontal plate 14, and an annular plate 18 disposed along the outer peripheral surface of the upper end of the pier 30 at the lower portion of the bottom plate 12. provided with a It is a joint structure between the pier and the cross beams, wherein Rukoto.

請求項１に記載の発明によれば、横桁の主桁及び横板により仕切られたセル室の少なくとも１つに、橋脚の上部に突設された鉄骨の数本を挿入し、セル室の内部にコンクリートを充填することで、橋脚と横桁とを剛結することができる。また、１つのセル室に数本の鉄骨を挿入させるため、セル室を大きく形成することができ、セル室内での作業が容易となる。また、セル室に充填したコンクリートを底板により拘束し、抜け出し耐力を増大させることができる。 According to the first aspect of the present invention, several steel frames protruding from the upper part of the pier are inserted into at least one of the cell chambers partitioned by the main girder of the cross beam and the horizontal plate. By filling the interior with concrete, the bridge pier and the cross beam can be rigidly connected. Moreover, since several steel frames are inserted into one cell chamber, the cell chamber can be formed large, and the work in the cell chamber becomes easy. In addition, the concrete filled in the cell chamber can be restrained by the bottom plate to increase the proof stress.

請求項２に記載の発明は、請求項１に記載の橋脚３０と横桁１０との接合構造において、前記主桁１１は上部にフランジ１１ｂを有するＴ型鋼からなり、そのフランジ１１ｂの上面には、縞状の横節１１ｃが形成されていることを特徴とする。   The invention according to claim 2 is the joining structure of the bridge pier 30 and the cross beam 10 according to claim 1, wherein the main girder 11 is made of T-shaped steel having a flange 11b at the upper portion, and the upper surface of the flange 11b is A striped transverse node 11c is formed.

請求項２に記載の発明によれば、Ｔ型鋼からなる主桁のフランジの上面に、縞状の横節が形成されているので、主桁のフランジを埋設するように、横桁上に床版コンクリートを打設することで、主桁と床版コンクリートとを剛結させることができる。   According to the second aspect of the present invention, since the striped horizontal nodes are formed on the upper surface of the flange of the main girder made of T-shaped steel, the floor is placed on the horizontal girder so as to embed the flange of the main girder. By placing slab concrete, the main girder and floor slab concrete can be rigidly connected.

請求項３に記載の発明は、請求項１または２に記載の橋脚３０と横桁１０との接合構造において、前記主桁１１及び横板１４の上部にはセル室２１内にコンクリートを充填する充填口１５ａを有する蓋板１５が設けられていることを特徴とする。 According to a third aspect of the present invention, in the joining structure of the bridge pier 30 and the cross beam 10 according to the first or second aspect , the upper portion of the main beam 11 and the horizontal plate 14 is filled with concrete in the cell chamber 21. A lid plate 15 having a filling port 15a is provided.

請求項３に記載の発明によれば、セル室に充填したコンクリートを蓋板により拘束し、鉄骨がセル室から抜け出すことを防ぐことができる。 According to invention of Claim 3 , the concrete with which the cell chamber was filled can be restrained with a cover board, and it can prevent that a steel frame slips out of a cell chamber.

請求項４に記載の発明は、図１２〜図１５に示すように、上部から複数の鉄骨３１が突出した橋脚３０を形成し、上部にフランジ１１ｂを有するＴ型鋼からなる主桁１１と横板１４とを枠状に形成した横桁１０を、主桁１１及び横板１４に仕切られたセル室２１内に前記鉄骨３１の数本が挿入されるように前記橋脚３０上に配置し、次いで、セル室２１内にコンクリートを充填し、次いで、主桁１１の両端を橋桁４０に接続し、その後、主桁１１のフランジ１１ｂを埋設するように横桁１０上に床版コンクリート５１を打設することを特徴とする橋の建設方法である。
請求項５に記載の発明は、請求項４に記載の建設方法により建設されることを特徴とする橋である。 As shown in FIGS. 12 to 15, the invention according to claim 4 forms a bridge pier 30 in which a plurality of steel frames 31 protrude from the upper part, and a main girder 11 and a transverse plate made of T-shaped steel having a flange 11 b on the upper part. 14 is arranged on the pier 30 so that several of the steel frames 31 are inserted into the cell chamber 21 partitioned by the main girder 11 and the horizontal plate 14, Then, the cell chamber 21 is filled with concrete, then both ends of the main girder 11 are connected to the bridge girder 40, and then the floor slab concrete 51 is placed on the horizontal girder 10 so that the flange 11b of the main girder 11 is embedded. It is the construction method of the bridge characterized by doing.
A fifth aspect of the present invention is a bridge constructed by the construction method according to the fourth aspect.

請求項４または５に記載の発明によれば、橋脚の鉄骨を挿入した横桁のセル室にコンクリートを充填することで、橋脚と横桁とを剛結させ、主桁のフランジを埋設するように横桁上に床版コンクリートを打設することで、横桁と床版コンクリートとを剛結させることができる。 According to the invention of claim 4 or 5 , the concrete is filled in the cell room of the cross beam in which the steel frame of the pier is inserted, so that the pier and the cross beam are rigidly connected and the flange of the main girder is embedded. By placing the floor slab concrete on the cross beam, the cross beam and the floor slab concrete can be rigidly connected.

本発明によれば、セル室を大きく形成することができ、セル室内での作業を容易にすることができる。   According to the present invention, the cell chamber can be formed large, and the work in the cell chamber can be facilitated.

以下、本発明の実施形態について詳細に説明する。まず、本発明が適用される横桁１０について説明する。
図１は本発明が適用される横桁１０を示す斜視図であり、図２は図１の横桁１０を示す平面図であり、図３は図１の横桁１０のIII−III矢視断面図であり、図４は図１の横桁１０のIV−IV矢視断面図である。また、図５は図４のV−V矢視断面図であり、図６は図４のVI−VI矢視断面図であり、図７は図４のVII−VII矢視断面図であり、図８は図４のVIII−VIII矢視断面図である。また、図９は図３のＡ部の拡大図である。 Hereinafter, embodiments of the present invention will be described in detail. First, the cross beam 10 to which the present invention is applied will be described.
1 is a perspective view showing a cross beam 10 to which the present invention is applied, FIG. 2 is a plan view showing the cross beam 10 of FIG. 1, and FIG. 3 is a cross-sectional view of the cross beam 10 of FIG. 4 is a cross-sectional view, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 5 is a cross-sectional view taken along line VV in FIG. 4, FIG. 6 is a cross-sectional view taken along arrow VI-VI in FIG. 4, and FIG. 7 is a cross-sectional view taken along arrow VII-VII in FIG. 8 is a cross-sectional view taken along arrow VIII-VIII in FIG. FIG. 9 is an enlarged view of part A in FIG.

横桁１０は、橋の前後方向に設けられた複数の主桁１１と、底板１２と、側板１３と、横板１４と、蓋板１５と、上側リブプレート１６と、下側リブプレート１７と、環状板１８と、を主構成要素とする。   The cross beam 10 includes a plurality of main beams 11 provided in the longitudinal direction of the bridge, a bottom plate 12, a side plate 13, a horizontal plate 14, a lid plate 15, an upper rib plate 16, and a lower rib plate 17. The annular plate 18 is a main component.

本実施形態においては、横桁１０の底面となる底板１２の両端部に、横桁１０側面となる側板１３の下端が接合され、２つの側板１３の間に１０本の主桁１１が設けられている。主桁１１はＴ型鋼からなり、ウェブ１１ａの下端が底板１２に接合されている。また、主桁１１のフランジ１１ｂの上面には、縞状の横節１１ｃが形成されている。環状板１１ｃがあることにより、主桁１１のフランジ１１ｂと後述する床版コンクリート５１とを剛結させることができる。   In the present embodiment, the lower ends of the side plates 13 serving as the side surfaces of the cross beam 10 are joined to both ends of the bottom plate 12 serving as the bottom surface of the cross beam 10, and ten main beams 11 are provided between the two side plates 13. ing. The main girder 11 is made of T-shaped steel, and the lower end of the web 11 a is joined to the bottom plate 12. Further, a striped transverse node 11 c is formed on the upper surface of the flange 11 b of the main girder 11. Due to the presence of the annular plate 11c, the flange 11b of the main girder 11 and a floor slab concrete 51 described later can be rigidly connected.

主桁１１及び底板１２の前後方向の両端部には、橋桁４０の主桁３１または底板３２と接合するための継手１１ｄ，１２ｄが設けられている。なお、主桁１１，３１、底板１２，３２はボルトで締結してもよいし、継手同士を溶接することにより接合してもよい。   At both ends of the main girder 11 and the bottom plate 12 in the front-rear direction, joints 11d and 12d for joining with the main girder 31 or the bottom plate 32 of the bridge girder 40 are provided. The main girders 11 and 31 and the bottom plates 12 and 32 may be fastened with bolts or may be joined by welding joints.

環状板１８は、底板１２の左右中央部の下面に接合されている。環状板１８は図８に示すような略四角形である。環状板１８の形状は後述する橋脚３０の形状と同じであり、環状板１８は橋脚３０の上端の外周面に沿って配置される。   The annular plate 18 is joined to the lower surface of the left and right center portion of the bottom plate 12. The annular plate 18 has a substantially rectangular shape as shown in FIG. The shape of the annular plate 18 is the same as the shape of the pier 30 described later, and the annular plate 18 is disposed along the outer peripheral surface of the upper end of the pier 30.

横板１４は、主桁１１の前後部分において、隣接する主桁１１間、及び主桁１１と側板１３との間に設けられ、下端が底板１２と接合されるとともに、左右端部が主桁１１または側板１３と接合されている。蓋板１５は前後の横板１４の間に設けられ、前端及び後端が横板１４の上端と接合され、左右端部が主桁１１または側板１３と接合されている。   The horizontal plate 14 is provided between the adjacent main beams 11 and between the main beam 11 and the side plate 13 in the front and rear portions of the main beam 11, and the lower end is joined to the bottom plate 12 and the left and right ends are the main beam. 11 or the side plate 13. The cover plate 15 is provided between the front and rear horizontal plates 14, the front end and the rear end are joined to the upper end of the horizontal plate 14, and the left and right end portions are joined to the main beam 11 or the side plate 13.

図４〜図７に示すように、１０本の主桁１１の間には、左右方向に上側リブプレート１６が設けられている。上側リブプレート１６は上端が蓋板１５と接合され、左右端部が主桁１１と接合されている。また、図４〜図６に示すように、左右それぞれ４本の主桁１１の間には、下側リブプレート１７が設けられている。下側リブプレート１７は下端が底板１２と接合され、左右端部が主桁１１と接合されている。
主桁１１、側板１３、底板１２、横板１４、及び蓋板１５により、複数のセル室２１，２２が形成されている。 As shown in FIGS. 4 to 7, an upper rib plate 16 is provided between the ten main beams 11 in the left-right direction. The upper rib plate 16 is joined to the lid plate 15 at the upper end and joined to the main girder 11 at the left and right ends. Further, as shown in FIGS. 4 to 6, a lower rib plate 17 is provided between the four main girders 11 on the left and right sides. The lower rib plate 17 has a lower end joined to the bottom plate 12 and left and right ends joined to the main girder 11.
A plurality of cell chambers 21 and 22 are formed by the main beam 11, the side plate 13, the bottom plate 12, the horizontal plate 14, and the lid plate 15.

次に、各セル室２１，２２について詳細に説明する。まず、中央の４本の主桁１１に挟まれる３つのセル室２１について説明する。
図３に示すように、セル室２１の底板１２には、それぞれ３個の挿入口１２ａが設けられている。この挿入口１２ａには、後述する橋脚３０の鉄骨３１が挿入される。
また、図２に示すように、セル室２１の蓋板１５には、前後方向の中央位置に、充填口１５ａが設けられている。この充填口１５ａは、後述するように、中央の３つのセル室内にコンクリート２７（図１７，図１８参照）を打設するときに用いられる。 Next, the cell chambers 21 and 22 will be described in detail. First, the three cell chambers 21 sandwiched between the four main girders 11 at the center will be described.
As shown in FIG. 3, the bottom plate 12 of the cell chamber 21 is provided with three insertion ports 12a. A steel frame 31 of a pier 30 described later is inserted into the insertion port 12a.
As shown in FIG. 2, the lid plate 15 of the cell chamber 21 is provided with a filling port 15 a at the center position in the front-rear direction. As will be described later, the filling port 15a is used when placing concrete 27 (see FIGS. 17 and 18) in the central three cell chambers.

セル室２１には、図９に示すように、主桁１１及び横板１４から突出するスタッド２３が設けられている。スタッド２３には必要に応じて配筋２４が施される。スタッド２３及び配筋２４があることにより、主桁１１及び横板１４と、セル室２１内に打設されるコンクリート２７とを剛結させることができる。   As shown in FIG. 9, the cell chamber 21 is provided with studs 23 that protrude from the main beam 11 and the lateral plate 14. The studs 23 are provided with reinforcing bars 24 as necessary. By having the stud 23 and the reinforcing bar 24, the main beam 11 and the horizontal plate 14 can be rigidly connected to the concrete 27 placed in the cell chamber 21.

スタッド２３や配筋２４はセル室２１内で溶接作業等を行うことにより設けられる。本発明では、１つのセル室２１に、後述する橋脚３０の鉄骨３１を３本挿入するので、セル室２１が従来よりも大きく、セル室２１内での作業が容易である。   The stud 23 and the reinforcing bar 24 are provided by performing a welding operation or the like in the cell chamber 21. In the present invention, since three steel frames 31 of the pier 30 described later are inserted into one cell chamber 21, the cell chamber 21 is larger than the conventional one and the work in the cell chamber 21 is easy.

次に、他のセル室２２について説明する。
セル室２２の底板１２には、図３に示すように、左右それぞれ４本の主桁１１の間及び両端の主桁１１と側板１３との間に、スタッド２５が設けられている。スタッド２５には必要に応じて配筋２６が施される。スタッド２５及び配筋２６は後述する下部コンクリート５０に埋設される。スタッド２５及び配筋２６があることにより、底板１２と下部コンクリート５０とを剛結させることができる。 Next, another cell chamber 22 will be described.
As shown in FIG. 3, the bottom plate 12 of the cell chamber 22 is provided with studs 25 between the four main beams 11 on the left and right sides, and between the main beams 11 and the side plates 13 at both ends. Reinforcing bars 26 are applied to the studs 25 as necessary. The stud 25 and the reinforcing bar 26 are embedded in the lower concrete 50 described later. By having the stud 25 and the reinforcing bar 26, the bottom plate 12 and the lower concrete 50 can be rigidly connected.

また、側板１３及び左右両側から３本ずつの主桁１１には、図１、図５に示すように、マンホール１１ｅ，１３ｅが設けられており、セル室２２への作業者の出入りを可能としている。なお、側板１３のマンホール１３ｅは橋の完成後に蓋される。上記横桁１０は、あらかじめ工場等で組み立てられる。   Further, as shown in FIGS. 1 and 5, manholes 11 e and 13 e are provided in the side plate 13 and three main girders 11 from the left and right sides, respectively, so that workers can enter and leave the cell chamber 22. Yes. In addition, the manhole 13e of the side plate 13 is covered after completion of the bridge. The cross beam 10 is assembled in advance at a factory or the like.

次に、本発明が適用される橋脚３０について説明する。
図１０は本発明が適用される橋脚３０を示す斜視図であり、図１１は図１０のXI−XI矢視断面図である。 Next, the pier 30 to which the present invention is applied will be described.
10 is a perspective view showing a pier 30 to which the present invention is applied, and FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG.

橋脚３０は鉄骨３１がコンクリート３２に埋設された鉄骨鉄筋コンクリートからなり、図示しないフーチング部分が地盤に埋設されて立設されている。橋脚３０の断面形状は、図１１に示すように、略四角形であり、その外周形状は環状板１８の内周形状にほぼ等しい。鉄骨３１は上端がコンクリート３２から突出しており、本実施形態では９本の鉄骨３１が上部を残してコンクリート３２に埋設された構造をしている。この部分が横桁１０の挿入口１２ａにそれぞれ挿入される。なお、鉄骨３１の上端を横桁１０の挿入口１２ａに挿入すると、コンクリート３２の上端面は横桁１０の底板１２の下面に当接し、コンクリート３２の上端の外周面は環状板１８の内周面と当接する。   The pier 30 is made of steel reinforced concrete in which a steel frame 31 is embedded in a concrete 32, and a footing portion (not shown) is embedded in the ground. As shown in FIG. 11, the cross-sectional shape of the pier 30 is a substantially square shape, and the outer peripheral shape thereof is substantially equal to the inner peripheral shape of the annular plate 18. The upper end of the steel frame 31 protrudes from the concrete 32. In the present embodiment, nine steel frames 31 are embedded in the concrete 32 leaving the upper part. This portion is inserted into the insertion slot 12a of the cross beam 10 respectively. When the upper end of the steel frame 31 is inserted into the insertion slot 12a of the cross beam 10, the upper end surface of the concrete 32 comes into contact with the lower surface of the bottom plate 12 of the cross beam 10, and the outer peripheral surface of the upper end of the concrete 32 is the inner periphery of the annular plate 18. Abuts the surface.

なお、鉄骨３１はＨ型鋼であり、そのフランジ３１ｂの外側面には、主桁１１のフランジ１１ｂ部分と同様に、縞状の横節３１ｃが形成されている。この横節３１ｃがあることにより、鉄骨３１が橋脚３０のコンクリート３２、及びセル室内に打設されるコンクリート２７（図１７，図１８参照）と剛結される。
鉄骨３１のコンクリート３２への埋設は、例えばプレキャストコンクリート製の埋設型枠を鉄骨３１の外周部に配置し、埋設型枠の内部にコンクリートを打設することにより行うことができる。打設したコンクリートが硬化することにより、橋脚３０が形成される。
なお、従来の型枠を使用する方法により橋脚３０を形成してもよい。 The steel frame 31 is H-shaped steel, and a striped horizontal node 31c is formed on the outer surface of the flange 31b, as in the flange 11b portion of the main girder 11. Due to the presence of the horizontal node 31c, the steel frame 31 is rigidly connected to the concrete 32 of the pier 30 and the concrete 27 (see FIGS. 17 and 18) placed in the cell chamber.
Embedment of the steel frame 31 in the concrete 32 can be performed, for example, by placing a precast concrete embedded formwork on the outer periphery of the steel frame 31 and placing the concrete inside the embedded formwork. The pier 30 is formed by hardening the cast concrete.
In addition, you may form the pier 30 by the method of using the conventional formwork.

次に、本発明の橋の建設方法について説明する。
まず、図１２に示すように、地盤上に立設された橋脚３０に対して、あらかじめ組み立てた横桁１０を上方から下降させ、橋脚３０の上部から突出した鉄骨３１を横桁１０の挿入口１２ａに挿入する。次に、図１３に示すように、充填口１５ａからセル室２１内にコンクリート２７を打設する。 Next, the bridge construction method of the present invention will be described.
First, as shown in FIG. 12, the prefabricated cross girder 10 is lowered from above with respect to the pier 30 erected on the ground, and the steel frame 31 protruding from the upper part of the pier 30 is inserted into the insertion slot of the cross girder 10. Insert into 12a. Next, as shown in FIG. 13, concrete 27 is placed in the cell chamber 21 from the filling port 15a.

ここで、セル室２１内に打設するコンクリート２７としては、高流動性（スランプフローが５０〜７０ｃｍの範囲）を有し、かつ材料分離抵抗性を維持した高流動性コンクリートを用いることが好ましい。また、鋼繊維を配合した鋼繊維補強コンクリートを用いることが好ましい。
このコンクリート２７が硬化することにより、橋脚３０と横桁１０とが剛結される。 Here, as the concrete 27 to be placed in the cell chamber 21, it is preferable to use high-fluidity concrete having high fluidity (slump flow in a range of 50 to 70 cm) and maintaining material separation resistance. . Moreover, it is preferable to use the steel fiber reinforced concrete which mix | blended the steel fiber.
When the concrete 27 is hardened, the bridge pier 30 and the cross beam 10 are rigidly connected.

次に、図１４に示すように、横桁１０の前後に支間部の橋桁４０を接合する。ここで、支間部の橋桁４０について簡単に説明する。橋桁４０は、横桁１０と同様に、主桁４１と、底板４２と、側板４３と、横板４４とを主構成要素とする。
橋桁４０の底面となる底板４２の両端部に、橋桁４０の側面となる側板４３の下端が接合され、２つの側板４３の間に１０本の主桁４１が設けられている点は横桁１０と同様である。横板４４は隣接する主桁４１間に設けられ、下端が底板４２と接合されるとともに、左右端部が主桁４１と接合されている。また、主桁４１と側板４３との間には、リブ材４５が設けられている。
横桁１０と橋桁４０の主桁１１，４１同士、底板１２，４２同士を接合することで、横桁１０に橋桁４０が接続される。 Next, as shown in FIG. 14, the bridge girder 40 in the span portion is joined before and after the cross beam 10. Here, the bridge girder 40 at the span will be briefly described. The bridge girder 40 has a main girder 41, a bottom plate 42, a side plate 43, and a horizontal plate 44 as main components, like the cross girder 10.
The lower end of the side plate 43 serving as the side surface of the bridge girder 40 is joined to both ends of the bottom plate 42 serving as the bottom surface of the bridge girder 40, and ten main girders 41 are provided between the two side plates 43. It is the same. The horizontal plate 44 is provided between the adjacent main girders 41, the lower end is joined to the bottom plate 42, and the left and right end portions are joined to the main girder 41. A rib member 45 is provided between the main beam 41 and the side plate 43.
The bridge beam 40 is connected to the cross beam 10 by joining the main beams 11 and 41 of the cross beam 10 and the bridge beam 40 and the bottom plates 12 and 42 together.

次に、横桁１０内に下部コンクリート５０（図１６〜図１８参照）を打設する。次に、床版コンクリート５１（図１５〜図１８参照）を打設する。床版コンクリート５１により主桁１１，４１の上部のフランジ１１ｂ，４１ｂが埋設されるが、フランジ１１ｂ，４１ｂの上面に縞状の横節が形成されているので、床版コンクリート５１を主桁１１，４１に剛結させることができる。
次いで、床版コンクリート５１上に側壁５２、防水層（図示せず）、アスファルト舗装５３等を設けることで、橋が完成する。 Next, the lower concrete 50 (see FIGS. 16 to 18) is placed in the cross beam 10. Next, floor slab concrete 51 (see FIGS. 15 to 18) is placed. The flanges 11b and 41b above the main girders 11 and 41 are embedded by the floor slab concrete 51. However, since striped horizontal nodes are formed on the upper surfaces of the flanges 11b and 41b, the floor slab concrete 51 is placed on the main girder 11. , 41 can be rigidly connected.
Next, a side wall 52, a waterproof layer (not shown), asphalt pavement 53, and the like are provided on the floor slab concrete 51 to complete the bridge.

図１５は完成した橋の橋脚３０近傍の上面、側面、及び断面を示す斜視図である。また、図１６は図１５のXVI−XVI矢視断面図であり、図１７は図１５のXVII−XVII矢視断面図である。また、図１８は図１７のXVIII−XVIII矢視断面図である。   FIG. 15 is a perspective view showing an upper surface, a side surface, and a cross section in the vicinity of the pier 30 of the completed bridge. 16 is a cross-sectional view taken along arrow XVI-XVI in FIG. 15, and FIG. 17 is a cross-sectional view taken along arrow XVII-XVII in FIG. 18 is a cross-sectional view taken along arrow XVIII-XVIII in FIG.

図１６〜図１８に示すように、底板１２，４２の上部に下部コンクリート５０が打設されている。橋桁４０の荷重により、橋桁４０の橋脚３０との接合部分には、上部に引張荷重が、下部に圧縮荷重が作用するが、下部コンクリート５０により圧縮荷重に抗することができる。   As shown in FIGS. 16 to 18, a lower concrete 50 is placed on top of the bottom plates 12 and 42. Due to the load of the bridge girder 40, a tensile load acts on the upper portion and a compressive load acts on the lower portion of the joint portion of the bridge girder 40 with the pier 30, but the lower concrete 50 can resist the compressive load.

また、図１７、図１８に示すように、横桁１０を橋脚３０のコンクリート３２の上に配置し、鉄骨３１が挿入されたセル室の内部にコンクリート２７を充填し、固化させることにより、橋脚３０のコンクリート３２とセル室内のコンクリート２７とが一体に形成され、橋脚３０と横桁１０とが剛結される。   Also, as shown in FIGS. 17 and 18, the cross girder 10 is placed on the concrete 32 of the pier 30, the concrete 27 is filled into the cell chamber in which the steel frame 31 is inserted, and solidified, thereby solidifying the pier. 30 concrete 32 and concrete 27 in the cell chamber are integrally formed, and the bridge pier 30 and the cross beam 10 are rigidly connected.

なお、以上の実施形態においては、横桁１０をあらかじめ工場等で組み立てることとしたが、施工現場にて組み立ててもよい。また、床版コンクリート５１の一部や側壁に、プレキャストコンクリートを用いてもよい。その他、具体的な細部構造についても適宜変更可能である。   In the above embodiment, the cross beam 10 is assembled in advance at a factory or the like, but may be assembled at a construction site. Further, precast concrete may be used for a part of the floor slab concrete 51 or the side wall. In addition, specific details of the structure can be changed as appropriate.

本発明が適用される横桁１０を示す斜視図である。It is a perspective view which shows the cross beam 10 with which this invention is applied. 図１の横桁１０を示す平面図である。It is a top view which shows the cross beam 10 of FIG. 図１の横桁１０のIII−III矢視断面図である。FIG. 3 is a cross-sectional view of the cross beam 10 of FIG. 図１の横桁１０のIV−IV矢視断面図である。It is IV-IV arrow sectional drawing of the cross beam 10 of FIG. 図４のV−V矢視断面図である。FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. 図４のVI−VI矢視断面図である。It is VI-VI arrow sectional drawing of FIG. 図４のVII−VII矢視断面図である。It is a VII-VII arrow sectional view of Drawing 4. 図４のVIII−VIII矢視断面図である。FIG. 5 is a cross-sectional view taken along arrow VIII-VIII in FIG. 4. 図３のＡ部の拡大図である。It is an enlarged view of the A section of FIG. 本発明が適用される橋脚３０を示す斜視図である。It is a perspective view which shows the pier 30 with which this invention is applied. 図１０のXI−XI矢視断面図である。It is XI-XI arrow sectional drawing of FIG. 本発明に係る橋脚３０と横桁１０との接合方法を示す斜視図である。It is a perspective view which shows the joining method of the bridge pier 30 and the cross beam 10 which concern on this invention. 本発明に係る橋脚３０と横桁１０との接合方法を示す斜視図である。It is a perspective view which shows the joining method of the bridge pier 30 and the cross beam 10 which concern on this invention. 本発明に係る橋脚３０と横桁１０との接合方法を示す斜視図である。It is a perspective view which shows the joining method of the bridge pier 30 and the cross beam 10 which concern on this invention. 本発明が適用された橋を示す斜視図である。It is a perspective view which shows the bridge to which this invention was applied. 図１５のXVI−XVI矢視断面図である。It is XVI-XVI arrow directional cross-sectional view of FIG. 図１５のXVII−XVII矢視断面図である。It is XVII-XVII arrow sectional drawing of FIG. 図１７のXVIII−XVIII矢視断面図である。It is XVIII-XVIII arrow sectional drawing of FIG.

符号の説明Explanation of symbols

１０ 横桁
１１ 主桁
１１ｂ フランジ
１１ｃ 横節
１２ 底板
１２ａ 挿入口
１４ 横板
１５ 蓋板
１５ａ 充填口
２１，２２ セル室
３０ 橋脚
３１ 鉄骨
４０ 橋桁
５１ 床版コンクリート 10 Horizontal Girder 11 Main Girder 11b Flange 11c Horizontal Node 12 Bottom Plate 12a Insertion Port 14 Horizontal Plate 15 Lid Plate 15a Filling Ports 21 and 22 Cell Chamber 30 Pier 21 Steel 40 Bridge Girder 51 Floor Slab Concrete

Claims (5)

橋脚と横桁との接合構造において、
前記橋脚は上部から複数の鉄骨の上端部が突設された鉄骨鉄筋コンクリートからなり、
前記横桁は平行に配列された複数の主桁と、隣り合う主桁同士を接続する横板とにより枠状に形成され、その内部空間は主桁及び横板により複数のセル室に仕切られ、
少なくとも１つのセル室内には、前記鉄骨の数本が挿入され、内部にコンクリートが充填され、
前記主桁及び横板の下部には前記鉄骨が挿入される挿入口を有する底板が設けられるとともに、
前記底板の下部には前記橋脚の上端の外周面に沿って配置される環状板が設けられていることを特徴とする橋脚と横桁との接合構造。 In the joint structure between the pier and the cross beam,
The pier is made of steel reinforced concrete with upper ends of a plurality of steel frames protruding from the top,
The cross beam is formed in a frame shape by a plurality of main beams arranged in parallel and a horizontal plate connecting adjacent main beams, and the internal space is partitioned into a plurality of cell chambers by the main beam and the horizontal plate. ,
In at least one cell chamber, several of the steel frames are inserted and filled with concrete ,
A bottom plate having an insertion slot into which the steel frame is inserted is provided at the lower part of the main girder and the horizontal plate,
An annular plate disposed along the outer peripheral surface of the upper end of the pier is provided at a lower portion of the bottom plate, and the junction structure of the pier and the cross beam is provided . 前記主桁は上部にフランジを有するＴ型鋼からなり、そのフランジの上面には、縞状の横節が形成されていることを特徴とする請求項１に記載の橋脚と横桁との接合構造。   The joint structure of a bridge pier and a cross girder according to claim 1, wherein the main girder is made of a T-shaped steel having a flange at an upper portion, and a striped horizontal node is formed on an upper surface of the flange. . 前記主桁及び横板の上部にはセル室内にコンクリートを充填する充填口を有する蓋板が設けられていることを特徴とする請求項１または２に記載の橋脚と横桁との接合構造。 3. The bridge pier / cross beam joining structure according to claim 1 or 2 , wherein a lid plate having a filling port for filling the cell chamber with concrete is provided on the main girder and the horizontal plate. 上部から複数の鉄骨が突出した橋脚を形成し、
上部にフランジを有するＴ型鋼からなる主桁と横板とを枠状に形成した横桁を、主桁及び横板に仕切られたセル室内に前記鉄骨の数本が挿入されるように前記橋脚上に配置し、
次いで、セル室内にコンクリートを充填し、
次いで、主桁の両端を橋桁に接続し、
その後、主桁のフランジを埋設するように横桁上に床版コンクリートを打設することを特徴とする橋の建設方法。 Form a pier with multiple steel frames protruding from the top,
The bridge pier is constructed so that a main girder made of T-shaped steel having a flange at the top and a horizontal plate formed into a frame shape are inserted into a cell chamber partitioned by the main girder and the horizontal plate. Placed on top
Next, the cell chamber is filled with concrete,
Next, connect both ends of the main girder to the bridge girder,
After that, a method for constructing a bridge is characterized in that floor slab concrete is placed on the horizontal girder so that the flange of the main girder is buried. 請求項４に記載の建設方法により建設されることを特徴とする橋。  A bridge constructed by the construction method according to claim 4.
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