JP5982143B2 - Reinforcing structure and reinforcing method for existing structure - Google Patents
Reinforcing structure and reinforcing method for existing structure Download PDFInfo
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Description
本発明は、既設構造物の補強構造及び補強方法に関し、特に、既設の橋梁の上部構造（床版、床組等）の補強に有効な既設構造物の補強構造及び補強方法に関する。 The present invention relates to a reinforcing structure and a reinforcing method for an existing structure, and more particularly to a reinforcing structure and a reinforcing method for an existing structure effective for reinforcing an upper structure (floor slab, floor set, etc.) of an existing bridge.
老朽化した既設の橋梁の上部構造（床版、床組等）を補強する工法には、床版の下面に鋼板を接着する鋼板接着工法、床版の下面に炭素繊維を接着する炭素繊維接着工法、床版の下面又は上面を鉄筋コンクリートで増厚するＲＣ増厚工法等があり、上面増厚工法以外の何れかの工法を用いることにより、車両等の通行を許容した状態で橋梁の上部構造を補強することができる。 There are two methods to reinforce the superstructure of existing bridges (floor slabs, floor groups, etc.): a steel plate bonding method that bonds steel plates to the bottom surface of the floor slab, and carbon fiber bonding that bonds carbon fibers to the bottom surface of the floor slab. There is a construction method, RC thickening method where the bottom or top surface of the slab is thickened with reinforced concrete, etc., and by using any construction method other than the top surface thickening method, the superstructure of the bridge while allowing passage of vehicles etc. Can be reinforced.
鋼板接着工法の一例が特許文献１に記載されている。特許文献１に記載の工法は、コンクリート床版の下面をスキンプレート（鋼板）により被覆するとともに、コンクリート床版とスキンプレートとの間に合成樹脂系の充填材を注入することにより、老朽化したコンクリート床版を補強するように構成したものである。 An example of a steel plate bonding method is described in Patent Document 1. The construction method described in Patent Document 1 is aged by covering the lower surface of a concrete slab with a skin plate (steel plate) and injecting a synthetic resin filler between the concrete slab and the skin plate. It is configured to reinforce the concrete floor slab.
ところで、上記の床版下面の補強の各工法は、何れも接着剤（合成樹脂系の接着剤、モルタル等）を使用しているため、鋼板、炭素繊維、増厚部分の剥がれの問題が生じる。特に、特許文献１に記載の技術は、コンクリート床版の下面にスキンプレートが点接触しているため、スキンプレートの剥がれを防止すべく、コンクリート床版とスキンプレートとの間に合成樹脂系の充填材を注入しているが、コンクリート床版からの活荷重を繰り返し受けることによって次第に剥がれが生じてくる。このため、メンテナンスフリーの状態で長期間、初期の性能を維持することが難しい。また、上記の各工法では、上部構造の各部材（床版、床組等）を各々補強する必要があるため、補強工事に多大な労力、時間、及び費用がかかる。 By the way, since each method of reinforcing the floor slab lower surface uses an adhesive (synthetic resin adhesive, mortar, etc.), there arises a problem of peeling of the steel plate, carbon fiber, and thickened portion. . In particular, in the technique described in Patent Document 1, since the skin plate is in point contact with the lower surface of the concrete slab, a synthetic resin system is used between the concrete slab and the skin plate to prevent the skin plate from peeling off. Although the filler is injected, peeling is gradually caused by repeatedly receiving the live load from the concrete slab. For this reason, it is difficult to maintain the initial performance for a long time in a maintenance-free state. Further, in each of the above methods, it is necessary to reinforce each member (floor slab, floor assembly, etc.) of the superstructure, so that a great amount of labor, time and cost are required for the reinforcement work.
本発明は、上記のような従来の問題に鑑みなされたものであって、既設の橋梁の上部構造の補強に適用した場合には、メンテナンスフリーの状態で初期の性能を長期的に維持することができて、既設の橋梁の上部構造の長寿命化を図ることができるとともに、上部構造の補強工事に要する手間、時間、及び費用を大幅に削減できるようにすることを目的とする。 The present invention has been made in view of the above-described conventional problems, and when applied to reinforcement of an existing bridge upper structure, the initial performance can be maintained for a long time in a maintenance-free state. It is possible to extend the life of the upper structure of the existing bridge and to greatly reduce the labor, time and cost required for the reinforcement work of the upper structure.
上記のような課題を解決するために、本発明は、以下のような手段を採用している。
すなわち、本発明は、床版と、床版を支持する複数の柱とを備えた既設の橋梁である既設構造物の補強構造であって、前記床版と前記柱との間に、前記床版からの荷重を面で受けて、該荷重を直接的又は間接的に前記柱に伝達させる荷重伝達手段を備え、前記荷重伝達手段は、前記床版からの荷重を面で受ける複数のアーチ部材と、該アーチ部材を支持するとともに、該アーチ部材が受けた荷重を前記柱に伝達させる受部材とを備え、前記受部材は、前記アーチ部材を上昇させるための開口部が形成されるように、隣接する柱間に架設された下層梁に一体に設けられ、前記複数のアーチ部材は、前記受部材上に固定された第１のアーチ部材と、前記開口部上に位置する第２のアーチ部材を含み、前記第２のアーチ部材は、前記受部材との間に水平方向に挿通された鋼棒により固定されていることを特徴とする。
In order to solve the above problems, the present invention employs the following means.
That is, the present invention is a reinforcing structure of an existing structure which is an existing bridge provided with a floor slab and a plurality of pillars that support the floor slab, and the floor is interposed between the floor slab and the pillar. A plurality of arch members that receive a load from the plate on the surface and transmit the load directly or indirectly to the column, the load transmitting unit receiving the load from the floor slab on the surface; And a receiving member that supports the arch member and transmits the load received by the arch member to the column, and the receiving member is formed with an opening for raising the arch member. The plurality of arch members are integrally provided on a lower beam built between adjacent columns, and the plurality of arch members are fixed on the receiving member, and a second arch located on the opening. A second arch member between the receiving member and the second arch member. Characterized in that it is fixed by inserting steel rods on the flat direction.
本発明の既設構造物の補強構造によれば、既設の橋梁の床版からの荷重を荷重伝達手段によって面で受けて柱に伝達させることにより、老朽化した床版を補強することができる。また、床版からの荷重を荷重伝達手段によって面で受けているため、老朽化した床版が疲労破壊（押し抜きせん断）を起こしても面的に支持することができるので、床版が抜け落ちるようなことはなく、床版を通行する車両等の安全を確保することができる。 According to the reinforcement structure of an existing structure of the present invention, an aged floor slab can be reinforced by receiving a load from the floor slab of an existing bridge on the surface by the load transmission means and transmitting it to the column. In addition, since the load from the floor slab is received by the surface by the load transmission means, the slab can be supported even if it causes fatigue failure (punch shear), so the floor slab falls off. There is no such thing, and the safety of a vehicle or the like passing through the floor slab can be ensured.
また、本発明において、前記アーチ部材と前記床版との間にグラウトを充填したこととしてもよい。 In the present invention, grout may be filled between the arch member and the floor slab.
本発明の既設構造物の補強構造によれば、床版からの荷重をグラウトを介して間接的にアーチ部材によって面で受けて、受部材を介して柱に伝達させることができる。 According to the reinforcing structure of an existing structure of the present invention, a load from a floor slab can be indirectly received by a surface by an arch member via a grout and transmitted to a column via a receiving member.
また、本発明において、前記アーチ部材は、上面が平面に形成される平板状の上弦材と、上弦材の下方に間隔をおいて設けられるアーチ板状の下弦材と、前記上弦材と前記下弦材との中央部間を連結する内補剛材と、前記上弦材と前記下弦材の両端部間を連結する外補剛材とを備え、前記上弦材の上面で前記床版からの荷重を受け、前記外補剛材の下端が前記受部材によって支持されていることとしてもよい。 In the present invention, the arch member includes a flat upper chord member having a flat upper surface, an arch plate-like lower chord member provided below the upper chord member, and the upper chord member and the lower chord member. An inner stiffener that connects between the central portions of the upper chord material and the lower chord material, and an outer stiffener that connects between the upper chord material and the lower chord material. The lower end of the outer stiffener may be supported by the receiving member.
本発明の既設構造物の補強構造によれば、床版からの荷重をアーチ部材の上弦材の上面で受け、外補剛材を介して受部材に伝達させ、受部材から柱に伝達させることができる。 According to the reinforcement structure of an existing structure of the present invention, the load from the floor slab is received on the upper surface of the upper chord member of the arch member, transmitted to the receiving member via the external stiffener, and transmitted from the receiving member to the column. Can do.
また、本発明の既設構造物の補強方法は、床版と、床版を支持する複数の柱と、隣接する柱間に架設された梁とを備えた既設の構造物の補強方法であって、前記床版からの荷重を面で受けるアーチ部材と、該アーチ部材を支持するとともに、該アーチ部材が受けた荷重を前記柱に伝達させる受部材とを用い、前記梁の上部に前記受部材を設け、この際に、前記アーチ部材を上昇させるための開口部を少なくとも１箇所に設けておき、最初又は次の前記アーチ部材を前記受部材の下方に進入させて、前記受部材の下方の位置において、最初又は次の前記アーチ部材を前記受部材よりも高い位置まで上昇させるとともに、前記受部材の上方に移動させて下降させることにより前記受部材の上部に載置させて、最初又は次の前記アーチ部材を前記受部材に固定する工程と、最後の前記アーチ部材を前記受部材の下方に進入させて、前記受部材の下方の位置において、前記開口部にて最後の前記アーチ部材を上昇させて、最後の前記アーチ部材と前記受部材との間に水平方向から鋼棒を挿通させて固定する工程とを備えていることを特徴とする。 Further, the method for reinforcing an existing structure according to the present invention is a method for reinforcing an existing structure including a floor slab, a plurality of columns supporting the floor slab, and a beam constructed between adjacent columns. An arch member that receives a load from the floor slab on a surface, and a receiving member that supports the arch member and transmits the load received by the arch member to the column, and the receiving member on an upper portion of the beam In this case, an opening for raising the arch member is provided in at least one place, and the first or next arch member is entered below the receiving member, In the position, the first or next arch member is raised to a position higher than the receiving member, and moved above the receiving member and lowered to be placed on the upper part of the receiving member. The arch member Fixing the material to the material, and making the last arch member enter below the receiving member, and at the position below the receiving member, raise the last arch member at the opening, A step of inserting and fixing a steel rod from the horizontal direction between the arch member and the receiving member .
以上、説明したように、本発明の既設構造物の補強構造及び補強方法によれば、既設の橋梁の上部構造の補強に適用した場合には、メンテナンスフリーの状態で初期の性能を長期的に維持することができ、既設の橋梁の上部構造の長寿命化を図ることができる。また、上部構造の補強工事に要する手間、時間、及び費用を大幅に削減することができる。 As described above, according to the reinforcement structure and the reinforcement method of the existing structure of the present invention, when applied to the reinforcement of the upper structure of the existing bridge, the initial performance is maintained in a maintenance-free state for a long time. Can be maintained, and the life of the superstructure of the existing bridge can be extended. In addition, the labor, time and cost required for the superstructure reinforcement work can be greatly reduced.
以下、図面を参照しながら本発明の実施の形態について説明する。
図１〜図１０には、本発明による既設構造物の補強構造の一実施の形態が示されている。本実施の形態の既設構造物の補強構造は、河川や海等を跨いだ状態に設置されている既設の橋梁の上部構造（床版、床組等）の補強に適用したものであって、車両等の通行を許容した状態で施工できるように構成したものである。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 10 show an embodiment of a reinforcing structure for an existing structure according to the present invention. The reinforcement structure of the existing structure of the present embodiment is applied to the reinforcement of the upper structure (floor slab, floor assembly, etc.) of an existing bridge installed in a state straddling a river or the sea, It is constructed so that it can be constructed in a state that allows passage of vehicles and the like.
既設の橋梁３０は、図１〜図４に示すように、例えば、車両等を支持する床版３２、床版３２を支持する床組３５（上層縦梁３６、上層横梁３７）等からなる上部構造３１と、下層縦梁３９、下層横梁４０等からなる下部構造３８と、車両等、上部構造３１、及び下部構造３８からの荷重を地盤４２に伝達させる柱４１とから構成され、上部構造３１の床版３２の下面３３側に本実施の形態の既設構造物の補強構造１が構築される。
なお、本実施の形態においては、海や河川等の水上を跨いだ状態に設置されている既設の道路橋梁を対象としているが、これに限定する陸上の橋梁にも適用してもよい。また、橋梁に限らず、既設の各種の構造物に適用してもよい。
As shown in FIGS. 1 to 4, the existing bridge 30 is, for example, an upper portion composed of a floor slab 32 that supports a vehicle and the like, a floor set 35 (an upper vertical beam 36, an upper horizontal beam 37) that supports the floor slab 32. The upper structure 31 includes a structure 31, a lower structure 38 composed of a lower vertical beam 39, a lower horizontal beam 40, and the like, a vehicle, an upper structure 31, and a pillar 41 that transmits a load from the lower structure 38 to the ground 42. The reinforcing structure 1 for an existing structure of the present embodiment is constructed on the lower surface 33 side of the floor slab 32.
In the present embodiment, an existing road bridge installed in a state straddling the surface of the sea, a river, or the like is targeted, but may be applied to a land bridge limited to this. Moreover, you may apply not only to a bridge but to various existing structures.
本実施の形態の既設構造物の補強構造１は、車両等、上部構造３１、及び下部構造３８からの荷重を面で受けて、間接的又は直接的に柱４１に伝達させる荷重伝達手段１ａを備え、荷重伝達手段１ａを、上部構造３１の床版３２の下面３３側の上層縦梁３６及び上層横梁３７によって囲まれた格子状の補強部分３４の各々に対応するように設けている。 The reinforcement structure 1 for an existing structure according to the present embodiment includes a load transmission means 1a that receives loads from the upper structure 31 and the lower structure 38 such as a vehicle and transmits them to the column 41 indirectly or directly. The load transmitting means 1a is provided so as to correspond to each of the grid-like reinforcing portions 34 surrounded by the upper vertical beam 36 and the upper horizontal beam 37 on the lower surface 33 side of the floor slab 32 of the upper structure 31.
荷重伝達手段１ａは、各補強部分３４に対応するように設けられる複数のアーチ部材２と、各補強部分３４に対応する下部構造３８の下層横梁４０の部分にそれぞれ設けられるとともに、各補強部分３４に設けられた複数のアーチ部材２を支持する受部材２０とから構成されている。 The load transmitting means 1 a is provided on each of the plurality of arch members 2 provided so as to correspond to the respective reinforcing portions 34 and the lower cross beam 40 of the lower structure 38 corresponding to each reinforcing portion 34, and each reinforcing portion 34. And a receiving member 20 that supports a plurality of arch members 2 provided on the arch member 2.
アーチ部材２及び受部材２０は、例えば、コンクリート製、鋼製、炭素繊維製等とすることができる。アーチ部材２及び受部材２０をコンクリート製とする場合には、場所打ちコンクリートでもプレキャストコンクリートでもよい。なお、本実施の形態においては、アーチ部材２及び受部材２０をプレキャストコンクリートとしている。 The arch member 2 and the receiving member 20 can be made of concrete, steel, carbon fiber, or the like, for example. When the arch member 2 and the receiving member 20 are made of concrete, cast-in-place concrete or precast concrete may be used. In the present embodiment, the arch member 2 and the receiving member 20 are precast concrete.
アーチ部材２としては、各補強部分３４の両側（橋梁３０の幅方向の両側）にそれぞれ設けられる一対の外アーチ部材３、３と、両外アーチ部材３、３間に設けられる一つの内アーチ部材１０とを用いている。 As the arch member 2, a pair of outer arch members 3 and 3 provided on both sides of each reinforcing portion 34 (both sides in the width direction of the bridge 30), and one inner arch provided between both outer arch members 3 and 3, respectively. The member 10 is used.
外アーチ部材３は、図５〜図７に示すように、上面４ａが平面に形成された長方形板状の上弦材４と、上弦材４の下方に間隔をおいて設けられる上方に湾曲したアーチ板状の下弦材５と、上弦材４と下弦材５の中央部間を連結する板状の内補剛材６と、上弦材４と下弦材５の両端部間を連結する板状の外補剛材７、７とから構成され、外アーチ部材３の上弦材４の上面４ａで床版３２からの荷重を受けるようになっている。 As shown in FIGS. 5 to 7, the outer arch member 3 includes a rectangular plate-like upper chord member 4 having an upper surface 4 a formed in a plane, and an upwardly curved arch provided below the upper chord member 4 at an interval. A plate-like lower chord member 5, a plate-like inner stiffener 6 that connects between the central portions of the upper chord member 4 and the lower chord member 5, and a plate-like outer member that connects between both ends of the upper chord member 4 and the lower chord member 5. The stiffeners 7 are configured to receive a load from the floor slab 32 on the upper surface 4a of the upper chord member 4 of the outer arch member 3.
各外補剛材７の下端部には、外アーチ部材３を後述する受部材２０の受部２２の上部に載置させるための脚部８が一体に設けられている。脚部８は、外面８ａが上弦材４の長さ方向の端面４ｂよりも外方に位置する鉛直方向を向く平面に形成され、下面８ｂが上弦材４の上面４ａと平行をなす平面に形成され、上面８ｃが所定の角度の傾斜面に形成され、上下面８ｃ、８ｃ間を貫通する第１挿通孔９が２箇所に設けられている。 A leg portion 8 for mounting the outer arch member 3 on an upper portion of a receiving portion 22 of a receiving member 20 described later is integrally provided at the lower end portion of each outer stiffener 7. The leg portion 8 is formed in a plane that faces the vertical direction in which the outer surface 8 a is located outward from the end surface 4 b in the length direction of the upper chord material 4, and the lower surface 8 b is formed in a plane that is parallel to the upper surface 4 a of the upper chord material 4. The upper surface 8c is formed as an inclined surface having a predetermined angle, and the first insertion holes 9 penetrating between the upper and lower surfaces 8c, 8c are provided at two locations.
外アーチ部材３は、その両外補剛材７、７の脚部８、８を、各補強部分３４に対応する下層横梁４０の上部に設けた受部材２０の上部に載置させ、各脚部８の第１挿通孔９と受部材２０の第３挿通孔２３との間に鉛直鋼棒２５ａを挿通させてグラウトで固着させることにより、各補強部分３４に対応する下層横梁４０、４０間に架設される。
なお、外アーチ部材３の上弦材４の上面４ａと各補強部分３４との間に隙間が形成される場合には、その隙間内に無収縮モルタル等のグラウト２７を充填して、上弦材４の上面４ａを各補強部分３４にグラウト２７を介して間接的に面接触させる。隙間がない場合には、グラウト２７の充填は不要となり、上下材４の上面４ａが各補強部分３４に直接的に面接触することになる。
The outer arch member 3 has the leg portions 8 and 8 of the outer stiffeners 7 and 7 placed on the upper portion of the receiving member 20 provided on the upper portion of the lower horizontal beam 40 corresponding to each reinforcing portion 34, and each leg. By inserting a vertical steel rod 25a between the first insertion hole 9 of the part 8 and the third insertion hole 23 of the receiving member 20 and fixing with a grout, between the lower horizontal beams 40, 40 corresponding to each reinforcing portion 34 It will be erected.
When a gap is formed between the upper surface 4a of the upper chord member 4 of the outer arch member 3 and each reinforcing portion 34, the upper chord member 4 is filled with a grout 27 such as a non-shrink mortar. The upper surface 4a of each is indirectly brought into surface contact with each reinforcing portion 34 through the grout 27. When there is no gap, filling of the grout 27 is not necessary, and the upper surface 4a of the upper and lower members 4 is in direct surface contact with each reinforcing portion 34.
内アーチ部材１０は、外アーチ部材３と略同一の構成を有するものであって、図８〜図１０に示すように、上面１１ａが平面に形成された長方形板状の上弦材１１と、上弦材１１の下方に間隔をおいて設けられる上方に湾曲したアーチ板状の下弦材１２と、上弦材１１と下弦材１２の中央部間を連結する板状の内補剛材１３と、上弦材１１と下弦材１２の両端部間を連結する板状の外補剛材１４、１４とから構成され、上弦材１１の上面１１ａで床版３２からの荷重を受けるようになっている。 The inner arch member 10 has substantially the same configuration as the outer arch member 3, and as shown in FIGS. 8 to 10, a rectangular plate-like upper chord material 11 having an upper surface 11a formed in a plane, and an upper chord An upwardly curved arch plate-like lower chord material 12 provided at an interval below the material 11, a plate-like internal stiffener 13 connecting the upper chord material 11 and the central portion of the lower chord material 12, and an upper chord material 11 and plate-like external stiffeners 14, 14 that connect both ends of the lower chord member 12. The upper surface 11 a of the upper chord member 11 receives a load from the floor slab 32.
各外補剛材１４の下端部には、内アーチ部材１０を外アーチ部材３を支持する受部材２０に連結するための脚部１５が一体に設けられている。脚部１５は、外面１５ａが上弦材１１の端面１１ｂよりも外方に位置する鉛直方向を向く平面に形成され、下面１５ｂが上弦材１１の上面１１ａと平行をなす平面に形成され、上面１５ｃが所定の角度の傾斜面に形成され、上下面１５ｃ、１５ｂ間が外アーチ部材３の脚部８よりも厚く形成され、この厚く形成された部分に、脚部１５を内アーチ部材１０の幅方向に貫通する第２挿通孔１６が１箇所に設けられている。 A leg portion 15 for connecting the inner arch member 10 to the receiving member 20 that supports the outer arch member 3 is integrally provided at the lower end portion of each outer stiffener 14. The leg portion 15 is formed in a plane facing the vertical direction with the outer surface 15a positioned outward from the end surface 11b of the upper chord material 11, the lower surface 15b is formed in a plane parallel to the upper surface 11a of the upper chord material 11, and the upper surface 15c. Is formed on an inclined surface having a predetermined angle, and the space between the upper and lower surfaces 15c and 15b is formed to be thicker than the leg portion 8 of the outer arch member 3, and the leg portion 15 is formed in the width of the inner arch member 10 in this thickly formed portion. A second insertion hole 16 penetrating in the direction is provided at one location.
内アーチ部材１０は、一対の外アーチ部材３、３間に位置し、内アーチ部材１０の各脚部１５の第２挿通孔１６と各外アーチ部材３の脚部８を支持する受部材２０の受部２２の第４挿通孔２４との間に水平鋼棒２５ｂを挿通させてグラウトで固着させることにより、各補強部分３４に対応する下層横梁４０、４０間に架設される。
なお、内アーチ部材１０の上弦材１１の上面１１ａと各補強部分３４との間に隙間が形成される場合には、外アーチ部材３と同様に、その隙間内に無収縮モルタル等のグラウト２７を充填して、上弦材１１の上面１１ａを各補強部分３４にグラウト２７を介して間接的に面接触させる。隙間がない場合には、グラウト２７の充填は不要となり、上下材１１の上面１１ａが各補強部分３４に直接的に面接触することになる。
The inner arch member 10 is located between the pair of outer arch members 3 and 3 and supports the second insertion holes 16 of the respective leg portions 15 of the inner arch member 10 and the leg portions 8 of the respective outer arch members 3. The horizontal steel rod 25b is inserted between the receiving portion 22 and the fourth insertion hole 24 and fixed by grouting, so that it is constructed between the lower horizontal beams 40 and 40 corresponding to the reinforcing portions 34.
When gaps are formed between the upper surface 11a of the upper chord member 11 of the inner arch member 10 and the reinforcing portions 34, like the outer arch member 3, a grout 27 such as a non-shrink mortar is formed in the gap. The upper surface 11a of the upper chord material 11 is indirectly brought into surface contact with each reinforcing portion 34 through the grout 27. When there is no gap, filling of the grout 27 is not necessary, and the upper surface 11a of the upper and lower members 11 is in direct surface contact with each reinforcing portion 34.
受部材２０は、図１〜図４に示すように、各補強部分３４に対応する下層横梁４０の上部に一体に設けられる角柱状の柱状部２１と、柱状部２１の上部に一体に設けられるとともに、長さ方向の両端が柱状部２１よりも外方に突出する長方形板状の受部２２とから構成され、受部２２の上部に外アーチ部材３の脚部８が載置されるようになっている。 As shown in FIGS. 1 to 4, the receiving member 20 is integrally provided on the upper part of the columnar part 21 and the prismatic columnar part 21 integrally provided on the upper part of the lower horizontal beam 40 corresponding to each reinforcing part 34. In addition, a rectangular plate-shaped receiving portion 22 whose both ends in the length direction protrude outward from the columnar portion 21, and the leg portion 8 of the outer arch member 3 is placed on the upper portion of the receiving portion 22. It has become.
図３及び図４に示すように、受部２２には、上下面間を貫通する第３挿通孔２３が２箇所に設けられるとともに、側面間を貫通する第４挿通孔２４が１箇所に設けられており、各第３挿通孔２３が外アーチ部材３の脚部８の各第１挿通孔９に対応し、第４挿通孔２４が内アーチ部材１０の脚部１５の第２挿通孔１６に対応するようになっている。 As shown in FIGS. 3 and 4, the receiving portion 22 is provided with the third insertion holes 23 penetrating between the upper and lower surfaces at two locations, and the fourth insertion hole 24 penetrating between the side surfaces is provided at one location. The third insertion holes 23 correspond to the first insertion holes 9 of the legs 8 of the outer arch member 3, and the fourth insertion holes 24 correspond to the second insertion holes 16 of the legs 15 of the inner arch member 10. It comes to correspond to.
そして、受部２２の上部に外アーチ部材３の脚部８を第１挿通孔９が第３挿通孔２３に一致するように載置させ、第１挿通孔９と第３挿通孔２３との間に鉛直鋼棒２５ａを挿通させて、第１挿通孔９及び第３挿通孔２３内にグラウトを充填して固着させることにより、受部２２の上部に外アーチ部材３の脚部８を固定することができ、外アーチ部材３を各補強部分３４に対応する下部構造３８の下層横梁４０、４０間に架設することができる。 Then, the leg portion 8 of the outer arch member 3 is placed on the receiving portion 22 so that the first insertion hole 9 coincides with the third insertion hole 23, and the first insertion hole 9 and the third insertion hole 23 are The vertical steel rod 25a is inserted between the first insertion hole 9 and the third insertion hole 23 so that the grout is filled and fixed, thereby fixing the leg portion 8 of the outer arch member 3 to the upper portion of the receiving portion 22. The outer arch member 3 can be installed between the lower cross beams 40 and 40 of the lower structure 38 corresponding to each reinforcing portion 34.
一対の外アーチ部材３、３を下部構造３８の下層横梁４０、４０間に架設した後に、両外アーチ部材４０、４０間に内アーチ部材１０を第２挿通孔１６が第４挿通孔２４に一致するように設置し、第２挿通孔１６と第４挿通孔２４との間に水平鋼棒２５ｂを挿通させて、第２挿通孔１６及び第４挿通孔２４内にグラウトを充填して固着させることにより、内アーチ部材１０の脚部１５を受部材２１に固定することができ、内アーチ部材１０を各補強部分３４に対応する下部構造３８の下層梁４０、４０間に架設することができる。
なお、第１挿通孔９、第２挿通孔１６、第３挿通孔２３、及び第４挿通孔２４内に充填するグラウトとしては、セメント系（モルタル等）、合成樹脂系等を使用することができる。
After the pair of outer arch members 3, 3 are installed between the lower cross beams 40, 40 of the lower structure 38, the second insertion hole 16 serves as the fourth insertion hole 24 with the inner arch member 10 between the outer arch members 40, 40. Installed so that they match, the horizontal steel rod 25b is inserted between the second insertion hole 16 and the fourth insertion hole 24, and the second insertion hole 16 and the fourth insertion hole 24 are filled with grout and fixed. By doing so, the leg portion 15 of the inner arch member 10 can be fixed to the receiving member 21, and the inner arch member 10 can be installed between the lower layer beams 40, 40 of the lower structure 38 corresponding to each reinforcing portion 34. it can.
In addition, as grout filled in the 1st penetration hole 9, the 2nd penetration hole 16, the 3rd penetration hole 23, and the 4th penetration hole 24, it is using a cement system (mortar etc.), a synthetic resin system, etc. it can.
次に、図１１〜図１４を参照しながら、本実施の形態の補強構造１の施工方法について説明する。
まず、図１１に示すように、既設の橋梁３０の床版３２の補強部分３４に対応する下層縦梁３９を適宜の手段によって取り除くことにより、橋梁３０の長さ方向に隣接する柱４１、４１間の側方を開口させる。
なお、下層横梁４０には、予め、上部に受部材２０を一体に設けておく。
Next, the construction method of the reinforcement structure 1 of this Embodiment is demonstrated, referring FIGS.
First, as shown in FIG. 11, the lower layer vertical beam 39 corresponding to the reinforcing portion 34 of the floor slab 32 of the existing bridge 30 is removed by an appropriate means, so that columns 41 and 41 adjacent in the length direction of the bridge 30 are removed. Open the side.
In addition, the lower member horizontal beam 40 is previously provided with the receiving member 20 integrally therewith.
次に、図１１、図１２、及び図１４に示すように、台船４５のリフター４６の上部に外アーチ部材３を載置し、台船４５を隣接する柱４１、４１間の開口を利用して補強部分３４の下方に進入させ、外アーチ部材３を補強部分３４の下方（受部材２０、２０間の隙間の下方）に配置する。 Next, as shown in FIG. 11, FIG. 12, and FIG. 14, the outer arch member 3 is placed on the upper portion of the lifter 46 of the carriage 45, and the opening between the columns 41, 41 adjacent to the carriage 45 is used. As a result, the outer arch member 3 is disposed below the reinforcing portion 34 (below the gap between the receiving members 20 and 20).
次に、リフター４６を操作して外アーチ部材３を上昇させ、受部材２０、２０間の隙間を通じて、外アーチ部材３の上弦材４の上面４ａを図１に示す補強部分３４の下面３３に接触させる。そして、図１３に示すように、台船４５を操作して、外アーチ部材３を橋梁３０の幅方向（図中矢印方向）に移動させることにより、外アーチ部材３を受部材２０の受部２２と補強部分３４との間に挿入する。そして、リフター４６を操作して外アーチ部材３を下降させることにより、外アーチ部材３の両脚部８、８を受部材２０の受部２２の上部に載置させる。 Next, the lifter 46 is operated to raise the outer arch member 3, and the upper surface 4 a of the upper chord material 4 of the outer arch member 3 is formed on the lower surface 33 of the reinforcing portion 34 shown in FIG. 1 through the gap between the receiving members 20 and 20. Make contact. Then, as shown in FIG. 13, the outer arch member 3 is moved in the width direction of the bridge 30 (in the direction of the arrow in the figure) by operating the carriage 45 to receive the outer arch member 3 in the receiving portion of the receiving member 20. 22 and the reinforcing portion 34. Then, by operating the lifter 46 to lower the outer arch member 3, the both leg portions 8 and 8 of the outer arch member 3 are placed on the upper portion of the receiving portion 22 of the receiving member 20.
次に、外アーチ部材３の両脚部８、８の位置を微調整して、各脚部８の第１挿通孔９を各受部材２０の受部２２の第３挿通孔２３に合わせ、第１挿通孔９と第３挿通孔２３との間に鉛直鋼棒２５ａを挿通させ、第１挿通孔９及び第３挿通孔２３内にグラウトを充填して固着させることにより、各脚部８を各受部材２０の受部２２に固定する（図１〜図４参照）。 Next, the position of the both leg portions 8 and 8 of the outer arch member 3 is finely adjusted so that the first insertion holes 9 of the respective leg portions 8 are aligned with the third insertion holes 23 of the receiving portions 22 of the respective receiving members 20, By inserting a vertical steel rod 25a between the first insertion hole 9 and the third insertion hole 23, and filling and fixing the grout in the first insertion hole 9 and the third insertion hole 23, each leg portion 8 is fixed. It fixes to the receiving part 22 of each receiving member 20 (refer FIGS. 1-4).
そして、もう一つの外アーチ部材３に対して同様の作業を行うことにより、補強部分３４の両側（橋梁３０の幅方向の両側）に対応するように、一対の外アーチ部材３、３を下部構造３８の下層横梁４０、４０間に架設する。そして、一対の外アーチ部材３、３の架設後に、各外アーチ部材３の上弦材４の上面４ａと補強部分３４の下面３３との間に隙間が形成されている場合には、その隙間内に無収縮モルタル等のグラウト２７を充填する（図１〜図４参照）。 Then, by performing the same operation on the other outer arch member 3, the pair of outer arch members 3, 3 are moved downward to correspond to both sides of the reinforcing portion 34 (both sides in the width direction of the bridge 30). It is constructed between the lower horizontal beams 40 and 40 of the structure 38. When a gap is formed between the upper surface 4a of the upper chord member 4 of each outer arch member 3 and the lower surface 33 of the reinforcing portion 34 after the pair of outer arch members 3 and 3 are installed, Is filled with grout 27 such as non-shrink mortar (see FIGS. 1 to 4).
次に、台船４５のリフター４６の上部に内アーチ部材１０を載置し、台船４５を隣接する柱４１、４１間の開口を利用して補強部分３４の下方に進入させ、内アーチ部材１０を補強部分３４の下方（受部材２０、２０間の隙間の下方）に配置する（図１１、図１２、図１４参照）。 Next, the inner arch member 10 is placed on the upper part of the lifter 46 of the carriage 45, and the carriage 45 is made to enter below the reinforcing portion 34 using the opening between the adjacent columns 41, 41, and the inner arch member 10 is disposed below the reinforcing portion 34 (below the gap between the receiving members 20 and 20) (see FIGS. 11, 12, and 14).
次に、リフター４６を操作して内アーチ部材１０を上昇させ、受部材２０、２０間の隙間を通じて、内アーチ部材１０の上弦材１１の上面１１ａを補強部分３４の下面３３に接触させる。そして、この状態で、リフター４６を操作して内アーチ部材１０を下降させて、内アーチ部材１０の上下方向の位置を微調整することにより、内アーチ部材１０の各脚部１５の第２挿通孔１６を各受部材２０の受部２２の第４挿通孔２４の位置に合わせる。そして、各脚部１５の第２挿通孔１６と各受部材２０の受部２２の第４挿通孔２４との間に 水平鋼棒２５ｂを挿通させ、各第２挿通孔１６及び各第４挿通孔２４内にグラウトを充填して固着させることにより、各脚部１５を各受部材２０の受部２２に固定する（図１〜図４、図１１、図１２、図１４参照）。
なお、内アーチ部材１０の上弦材１１の上面１１ａと補強部分３４の下面３３との間に隙間が形成されている場合には、その隙間内に無収縮モルタル等のグラウト２７を充填する。
Next, the lifter 46 is operated to raise the inner arch member 10, and the upper surface 11 a of the upper chord material 11 of the inner arch member 10 is brought into contact with the lower surface 33 of the reinforcing portion 34 through the gap between the receiving members 20, 20. In this state, the lifter 46 is operated to lower the inner arch member 10 and finely adjust the position of the inner arch member 10 in the vertical direction, whereby the second insertion of each leg portion 15 of the inner arch member 10 is performed. The hole 16 is aligned with the position of the fourth insertion hole 24 of the receiving portion 22 of each receiving member 20. Then, a horizontal steel rod 25b is inserted between the second insertion hole 16 of each leg portion 15 and the fourth insertion hole 24 of the receiving portion 22 of each receiving member 20, and each second insertion hole 16 and each fourth insertion hole are inserted. Each leg 15 is fixed to the receiving part 22 of each receiving member 20 by filling and fixing the grout in the hole 24 (see FIGS. 1 to 4, 11, 12, and 14).
When a gap is formed between the upper surface 11a of the upper chord member 11 of the inner arch member 10 and the lower surface 33 of the reinforcing portion 34, a grout 27 such as a non-shrink mortar is filled in the gap.
そして、上記のような一対の外アーチ部材３、３を架設する作業、及び内アーチ部材１０を架設する作業を床版３２の各補強部分３４に対して繰り返し行うことにより、床版３２の下面３３側の全体を補強する補強構造１を構築することができる。 Then, by repeatedly performing the operation of installing the pair of outer arch members 3 and 3 and the operation of installing the inner arch member 10 as described above with respect to each reinforcing portion 34 of the floor slab 32, The reinforcing structure 1 that reinforces the entire 33 side can be constructed.
上記のように構成した本実施の形態の補強構造１及び補強方法にあっては、橋梁３０の上部構造３１の床版３２の各補強部分３４の下面３３に、下部構造３８の下層横梁４０、４０間に架設した外アーチ部材３及び内アーチ部材１０の上弦材４、１１の上面４ａ、１１ａを直接的に又はグラウト２７を介して間接的に接触させて、床版３２からの荷重を面で受けて柱４１に伝達させるように構成したので、つまり、下方から床版３２を面で支持することとしたので、床版３２からの活荷重を繰り返し受けても、鋼板接着工法、炭素繊維接着工法、増厚工法等のように接着剤の剥がれの問題が生じるようなことはなく、メンテナンスフリーの状態で長期に亘って初期の性能を維持することができる。 In the reinforcing structure 1 and the reinforcing method of the present embodiment configured as described above, the lower horizontal beam 40 of the lower structure 38 is provided on the lower surface 33 of each reinforcing portion 34 of the floor slab 32 of the upper structure 31 of the bridge 30. The upper arch members 3, the upper arch members 4, 11 of the inner arch member 10, and the upper surfaces 4 a, 11 a of the inner arch member 10 are brought into contact directly or indirectly via the grout 27, and the load from the floor slab 32 is surfaced. In other words, since the floor slab 32 is supported by the surface from below, the steel plate bonding method, carbon fiber can be used even if the live load from the floor slab 32 is repeatedly received. The problem of peeling of the adhesive does not occur unlike the bonding method, the thickening method, etc., and the initial performance can be maintained for a long time in a maintenance-free state.
また、床版３２が疲労破壊（押し抜きせん断）を起こした場合であっても、外アーチ部材３の上弦材４の上面４ａ及び内アーチ部材１０の上弦材１１の上面１１ａが床版３２の下面３３に直接的に又はグラウト２７を介して間接的に接触して、床版３２を面的に支持しているので、床版３２が抜け落ちるようなことはなく、床版３２の上部の車両等の安全を確保することができる。 Further, even when the floor slab 32 is subjected to fatigue failure (punch shear), the upper surface 4 a of the upper chord material 4 of the outer arch member 3 and the upper surface 11 a of the upper chord material 11 of the inner arch member 10 are the floor slab 32. Since the floor slab 32 is supported by being in direct contact with the lower surface 33 or indirectly through the grout 27, the floor slab 32 does not fall out, and the vehicle above the floor slab 32 Etc. can be secured.
また、床版３２を外アーチ部材３及び内アーチ部材１０によって支持することにより、床版３２に作用する断面力、及び床版３２を支持する上層縦梁３６及び上層横梁３７の断面力を軽減させることができるので、橋梁３０の上部構造３１の全体の長寿命化を図ることができる。 Further, by supporting the floor slab 32 by the outer arch member 3 and the inner arch member 10, the sectional force acting on the floor slab 32 and the sectional forces of the upper vertical beam 36 and the upper lateral beam 37 supporting the floor slab 32 are reduced. Therefore, the life of the entire upper structure 31 of the bridge 30 can be extended.
また、床版３２が鋼板接着工法、炭素繊維接着工法、増厚工法等で補強されている場合であっても、既存の鋼板、炭素繊維等をそのままの状態にして、外アーチ部材３及び内アーチ部材１０を下部構造３８の下層横梁４０、４０間に架設し、外アーチ部材３及び内アーチ部材１０の上弦材４、１１と床版３２との間に無収縮モルタル等のグラウト２７を充填することにより、既存の鋼板、炭素繊維等を取り除くことなく、床版３２を補強することができる。また、既存の鋼板等をグラウト２７で被覆することができるので、既存の鋼板等が空気と接触して錆びるようなこともない。 Even if the floor slab 32 is reinforced by a steel plate bonding method, a carbon fiber bonding method, a thickening method, etc., the existing arch member 3 and the inner arch member 3 and the inner The arch member 10 is installed between the lower cross beams 40 and 40 of the lower structure 38, and a grout 27 such as a non-shrink mortar is filled between the outer arch member 3 and the upper chord members 4 and 11 of the inner arch member 10 and the floor slab 32. By doing so, the floor slab 32 can be reinforced without removing existing steel plates, carbon fibers and the like. Moreover, since the existing steel plate etc. can be coat | covered with grout 27, the existing steel plate etc. do not come into contact with air and rust.
また、床版３２の下面３３側に補強構造１を構築する場合、下部構造３８の下層縦梁３９を取り除いて、柱４１、４１間の開口を通じて補強部分３４の下方に台船４５を使ってアーチ部材２（外アーチ部材３、内アーチ部材１０）を配置し、リフター４５の操作によってアーチ部材２（外アーチ部材３、内アーチ部材１０）を上昇させて、下部構造３８の下層横梁４０の上部に設けた受部材２０の上部に載置させ、アーチ部材２（外アーチ部材３、内アーチ部材１０）を受部材２０に鉛直鋼棒２５ａ水平鋼棒２５ｂ及びグラウトによって固定すればよいので、補強構造１の構築に要する手間、時間、及び費用を大幅に削減することができる。また、車両の通行を許容した状態で施工できる。 When the reinforcing structure 1 is constructed on the lower surface 33 side of the floor slab 32, the lower vertical beam 39 of the lower structure 38 is removed, and a base boat 45 is used below the reinforcing portion 34 through the opening between the columns 41 and 41. The arch member 2 (the outer arch member 3 and the inner arch member 10) is arranged, and the arch member 2 (the outer arch member 3 and the inner arch member 10) is raised by the operation of the lifter 45, so that the lower cross beam 40 of the lower structure 38 is moved. Since the arch member 2 (outer arch member 3, inner arch member 10) may be fixed to the receiving member 20 by the vertical steel bar 25a, the horizontal steel bar 25b, and the grout, because it is placed on the upper part of the receiving member 20 provided on the upper part. The labor, time, and cost required for constructing the reinforcing structure 1 can be greatly reduced. In addition, the construction can be performed in a state where the vehicle is allowed to pass.
また、アーチ部材２（外アーチ部材３、内アーチ部材１０）は、長さ方向が橋梁３０の長さを方向を向くように、床版３２の下面３３側の各補強部分３４に設けられているので、アーチ部材２（外アーチ部材３、内アーチ部材１０）の上弦材４、１１、下弦材５、１２、内補剛材６、１３、外補剛材７、１４、及びそれらによって囲まれた開口部分の形状を橋梁３０の側方に露出させることができ、これらの形状によって橋梁３０の上部構造３１の美観を高めることができる。 Further, the arch member 2 (the outer arch member 3 and the inner arch member 10) is provided in each reinforcing portion 34 on the lower surface 33 side of the floor slab 32 so that the length direction faces the length of the bridge 30. Therefore, the upper chord members 4 and 11, the lower chord members 5 and 12, the inner stiffener members 6 and 13, the outer stiffener members 7 and 14, and the arch member 2 (outer arch member 3 and inner arch member 10) are surrounded by them. The shape of the opened portion can be exposed to the side of the bridge 30, and the aesthetic appearance of the upper structure 31 of the bridge 30 can be enhanced by these shapes.
なお、上記の説明においては、アーチ部材２（外アーチ部材３、内アーチ部材１０）の長さ方向が橋梁３０の長さ方向を向くように、床版３２の下面３３側にアーチ部材２（外アーチ部材３、内アーチ部材１０）を設けたが、アーチ部材２（外アーチ部材３、内アーチ部材１０）の長さ方向が橋梁３の幅方向を向くように、床版３２の下面３３側にアーチ部材２（外アーチ部材３、内アーチ部材１０）を設けてもよい。その場合には、下部構造３８の下層縦梁３９、３９間にアーチ部材２（外アーチ部材３、内アーチ部材１０）を架設すればよい。 In the above description, the arch member 2 (on the lower surface 33 side of the floor slab 32 is arranged so that the length direction of the arch member 2 (the outer arch member 3 and the inner arch member 10) faces the length direction of the bridge 30. Although the outer arch member 3 and the inner arch member 10 are provided, the lower surface 33 of the floor slab 32 is arranged so that the length direction of the arch member 2 (the outer arch member 3 and the inner arch member 10) faces the width direction of the bridge 3. You may provide the arch member 2 (the outer arch member 3, the inner arch member 10) in the side. In that case, the arch member 2 (the outer arch member 3 and the inner arch member 10) may be constructed between the lower layer vertical beams 39 of the lower structure 38.
また、上記の説明においては、床版３２の各補強部分３４を３つのアーチ部材２（外アーチ部材３、内アーチ部材１０）によって補強したが、１つ、２つ、又は４つ以上のアーチ部材２（外アーチ部材３、内アーチ部材１０）によって補強するように構成してもよい。 In the above description, each reinforcing portion 34 of the floor slab 32 is reinforced by the three arch members 2 (the outer arch member 3 and the inner arch member 10). However, one, two, or four or more arches are used. You may comprise so that it may reinforce by the member 2 (the outer arch member 3, the inner arch member 10).
また、上記の説明においては、プレキャストコンクリート製のアーチ部材２（外アーチ部材３、内アーチ部材１０）を床版３２の下面３３側に設けたが、現場打ちのコンクリートによって床版３２の下面３３側にアーチ部材２（外アーチ部材３、内アーチ部材１０）を設けてもよい。また、アーチ部材２（外アーチ部材３、内アーチ部材１０）は、コンクリート製に限らず、鋼製、炭素繊維製等としてもよい。 In the above description, the arch member 2 made of precast concrete (the outer arch member 3 and the inner arch member 10) is provided on the lower surface 33 side of the floor slab 32. However, the lower surface 33 of the floor slab 32 is made of on-site concrete. You may provide the arch member 2 (the outer arch member 3, the inner arch member 10) in the side. Further, the arch member 2 (the outer arch member 3 and the inner arch member 10) is not limited to concrete but may be made of steel, carbon fiber, or the like.
また、上記の説明においては、荷重伝達手段１ａとして、アーチ部材２と受部材２０との組合せを用いたが、これに限定することなく、床版３２からの荷重を面で受けて柱４１に伝達させることができる機能を有するもの、例えば、ラーメン構造、トラス構造等であってもよい。 Further, in the above description, the combination of the arch member 2 and the receiving member 20 is used as the load transmitting means 1a. However, the present invention is not limited to this. It may have a function that can be transmitted, for example, a ramen structure, a truss structure, or the like.
１ 補強構造
１ａ 荷重伝達手段
２ アーチ部材
３ 外アーチ部材
４ 上弦材
４ａ 上面
４ｂ 端面
５ 下弦材
６ 内補剛材
７ 外補剛材
８ 脚部
８ａ 外面
８ｂ 下面
８ｃ 上面
９ 第１挿通孔
１０ 内アーチ部材
１１ 上弦材
１１ａ 上面
１１ｂ 端面
１２ 下弦材
１３ 内補剛材
１４ 外補剛材
１５ 脚部
１５ａ 外面
１５ｂ 下面
１５ｃ 上面
１６ 第２挿通孔
２０ 受部材
２１ 柱状部
２２ 受部
２３ 第３挿通孔
２４ 第４挿通孔
２５ａ 鉛直鋼棒
２５ｂ 水平鋼棒
２７ グラウト
３０ 橋梁
３１ 上部構造
３２ 床版
３３ 下面
３４ 補強部分
３５ 床組
３６ 上層縦梁
３７ 上層横梁
３８ 下部構造
３９ 下層縦梁
４０ 下層横梁
４１ 柱
４２ 地盤
４５ 台船
４６ リフター
DESCRIPTION OF SYMBOLS 1 Reinforcement structure 1a Load transmission means 2 Arch member 3 Outer arch member 4 Upper chord material 4a Upper surface 4b End surface 5 Lower chord material 6 Inner stiffener 7 Outer stiffener 8 Leg portion 8a Outer surface 8b Lower surface 8c Upper surface 9 In first insertion hole 10 In Arch member 11 Upper chord member 11a Upper surface 11b End surface 12 Lower chord member 13 Inner stiffener 14 Outer stiffener 15 Leg 15a Outer surface 15b Lower surface 15c Upper surface 16 Second insertion hole 20 Receiving member 21 Columnar portion 22 Receiving portion 23 Third insertion hole 24 4th insertion hole 25a Vertical steel bar 25b Horizontal steel bar 27 Grout 30 Bridge 31 Upper structure 32 Floor slab 33 Lower surface 34 Reinforcement part 35 Floor group 36 Upper layer vertical beam 37 Upper layer horizontal beam 38 Lower structure 39 Lower layer vertical beam 40 Lower layer horizontal beam 41 Column 42 Ground 45 Boat 46 Lifter
Claims (4)
前記床版と前記柱との間に、前記床版からの荷重を面で受けて、該荷重を直接的又は間接的に前記柱に伝達させる荷重伝達手段を備え、
前記荷重伝達手段は、前記床版からの荷重を面で受ける複数のアーチ部材と、該アーチ部材を支持するとともに、該アーチ部材が受けた荷重を前記柱に伝達させる受部材とを備え、
前記受部材は、前記アーチ部材を上昇させるための開口部が形成されるように、隣接する柱間に架設された下層梁に一体に設けられ、
前記複数のアーチ部材は、前記受部材上に固定された第１のアーチ部材と、前記開口部の上に位置する第２のアーチ部材を含み、前記第２のアーチ部材は、前記受部材との間に水平方向に挿通された鋼棒により固定されていることを特徴とする既設構造物の補強構造。 A reinforcement structure for an existing structure, which is an existing bridge having a floor slab and a plurality of columns supporting the floor slab ,
Between the floor slab and the column, comprising a load transmission means for receiving a load from the floor slab on a surface and transmitting the load to the column directly or indirectly ,
The load transmitting means includes a plurality of arch members that receive a load from the floor slab on a surface, and a receiving member that supports the arch member and transmits the load received by the arch member to the column,
The receiving member is provided integrally with a lower beam constructed between adjacent columns so that an opening for raising the arch member is formed,
The plurality of arch members include a first arch member fixed on the receiving member, and a second arch member positioned on the opening, and the second arch member includes the receiving member. A reinforcing structure for an existing structure characterized by being fixed by a steel rod inserted horizontally between the two .
前記上弦材の上面で前記床版からの荷重を受け、前記外補剛材の下端が前記受部材によって支持されていることを特徴とする請求項１又は２に記載の既設構造物の補強構造。 The arch member includes a flat upper chord material having a flat upper surface, an arch plate-like lower chord material provided below the upper chord material, and a central portion between the upper chord material and the lower chord material. An inner stiffener that connects the outer chord, and an outer stiffener that connects between both ends of the upper chord member and the lower chord member,
The reinforcing structure for an existing structure according to claim 1 or 2 , wherein a load from the floor slab is received on an upper surface of the upper chord member, and a lower end of the outer stiffener is supported by the receiving member. .
前記床版からの荷重を面で受けるアーチ部材と、該アーチ部材を支持するとともに、該アーチ部材が受けた荷重を前記柱に伝達させる受部材とを用い、
前記梁の上部に前記受部材を設け、この際に、前記アーチ部材を上昇させるための開口部を少なくとも１箇所に設けておき、
最初又は次の前記アーチ部材を前記受部材の下方に進入させて、前記受部材の下方の位置において、最初又は次の前記アーチ部材を前記受部材よりも高い位置まで上昇させるとともに、前記受部材の上方に移動させて下降させることにより前記受部材の上部に載置させて、最初又は次の前記アーチ部材を前記受部材に固定する工程と、
最後の前記アーチ部材を前記受部材の下方に進入させて、前記受部材の下方の位置において、前記開口部にて最後の前記アーチ部材を上昇させて、最後の前記アーチ部材と前記受部材との間に水平方向から鋼棒を挿通させて固定する工程とを備えていることを特徴とする既設の構造物の補強方法。 A method for reinforcing an existing structure comprising a floor slab, a plurality of columns supporting the floor slab, and a beam erected between adjacent columns,
Using an arch member that receives the load from the floor slab on the surface, and a receiving member that supports the arch member and transmits the load received by the arch member to the column,
The receiving member is provided on the upper part of the beam, and at this time, an opening for raising the arch member is provided in at least one place,
The first or next arch member is entered below the receiving member to raise the first or next arch member to a position higher than the receiving member at a position below the receiving member, and the receiving member The first arch member and the next arch member are fixed to the receiving member.
The last arch member enters below the receiving member, the last arch member is raised at the opening at a position below the receiving member, and the last arch member and the receiving member A method of reinforcing an existing structure, comprising a step of inserting a steel rod from a horizontal direction and fixing between the two.
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