JP4675826B2 - Continuous structure of bridge joints - Google Patents

Continuous structure of bridge joints Download PDF

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JP4675826B2
JP4675826B2 JP2006141079A JP2006141079A JP4675826B2 JP 4675826 B2 JP4675826 B2 JP 4675826B2 JP 2006141079 A JP2006141079 A JP 2006141079A JP 2006141079 A JP2006141079 A JP 2006141079A JP 4675826 B2 JP4675826 B2 JP 4675826B2
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bridge
joint member
joint
precast
continuous structure
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JP2007309032A (en
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順 桜井
英勝 住吉
恒夫 臼井
健二郎 小林
久美子 須田
剛紀 平石
一郎 福田
雄介 梶浦
静男 内藤
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Kajima Corp
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Description

本発明は、道路橋等の橋梁の橋桁中間部や端部におけるジョイント部の連続化構造に関するものである。   The present invention relates to a continuous structure of a joint portion at an intermediate portion or an end portion of a bridge girder of a bridge such as a road bridge.

道路橋等においては、連続する橋桁と橋桁との間、橋桁と橋台との間には、交通荷重による橋桁のたわみや温度変化に伴う伸縮等により生じる動きの違いを吸収し、交通荷重を安全に通過させるための伸縮継手という構造が設けられている。   In road bridges, etc., the difference in movement caused by the deflection of the bridge girder due to traffic load and the expansion and contraction due to temperature change is absorbed between the bridge girder and the bridge girder. There is provided a structure called an expansion joint for passing through.

従来の伸縮継手は、鋼製の爪や鋼板の組合せ、伸縮するゴム系のジョイント構造が用いられてきたが、表面の凹凸や段差が存在することにより、交通荷重の通過に伴って振動や騒音発生の原因となっている。   Conventional expansion joints have used a combination of steel claws and steel plates, and a rubber joint structure that expands and contracts. However, due to the presence of unevenness and steps on the surface, vibration and noise occur as traffic loads pass. It is the cause of the occurrence.

図8は、ゴム系の伸縮ジョイントの一例であり、遊間をおいて対向配置されている橋桁1、1の端部における舗装体5を所定範囲にわたって撤去し、橋桁の床版2の上部を所定範囲にわたってはつり、形成された切欠き空間に遊間4を跨いでゴムジョイント70を配置し、隙間空間を超早強コンクリート71で埋めると共に、アンカーボルト72と床版埋込み筋73を用いて定着させている。遊間4にはウレタンフォーム74を配置している。このジョイント構造の場合、車両通過時に騒音・振動が発生する、アスファルト舗装体5とコンクリート71の接合部の磨耗・段差が発生する、アンカーボルト72のがたつきが生じる、ゴムジョイント70が損傷する、ジョイント部から漏水するなどの問題がある。   FIG. 8 shows an example of a rubber-type expansion joint. The pavement 5 at the ends of the bridge girders 1 and 1 that are arranged to face each other with a gap is removed over a predetermined range, and the upper part of the floor slab 2 of the bridge girder is predetermined. The rubber joint 70 is arranged across the gap 4 in the formed notch space, and the gap space is filled with the ultra-high-strength concrete 71 and fixed using the anchor bolt 72 and the floor slab embedding muscle 73. Yes. A urethane foam 74 is disposed in the clearance 4. In the case of this joint structure, noise / vibration is generated when passing through the vehicle, wear / steps at the joint between the asphalt pavement 5 and the concrete 71 occur, rattling of the anchor bolt 72 occurs, and the rubber joint 70 is damaged. There are problems such as water leakage from the joint.

この騒音・振動を解消するための対策として、表面舗装を連続化させる埋設ジョイント工法、床版コンクリートを連続化させる床版連結工法、主桁を連結して連続化させる主桁連結工法、端横桁を連結する横桁連結工法等があり、伸縮継手によって区切られていた走行路を一様な路面に改良すること(一般にノージョイント化と呼ばれている)が行われつつある。   Measures to eliminate this noise and vibration include buried joint method for continuous surface pavement, floor slab connection method for continuous floor slab concrete, main girder connection method for continuous main girder, There is a cross girder connecting method for connecting girders, etc., and improvement of a traveling road partitioned by expansion joints to a uniform road surface (generally called no-joint) is being performed.

耐久性を確保できるノージョイント化工法としては、床版コンクリートと鋼桁の一部のみを連続化した床版連結工法が現時点では唯一とされている。図9はそのノージョイント化床版連結構造の例であり、橋桁1、1の端部の舗装5を所定範囲にわたって撤去し、橋桁の床版2を所定範囲にわたって撤去し、床版2の既設鉄筋6に連結鉄筋80を溶接で取付け、床版2、2間の空間に樹脂コンクリート81を打設し、この上にアスファルト等の舗装体5を再舗装する。鋼桁3の上部フランジの端部同士は、連結鋼板82、添接板83、フィラープレート84を用いて連結する。連結鋼板82等の上には、発泡スチロールの縁切り材85が桁上に配置される。桁端の鉛直方向の桁回転変位(角変化、角折れ)、温度収縮・膨張に対して、連結鉄筋80・連結鋼板82の弾性ひずみで抵抗する。   As the no-joint construction method that can ensure the durability, the floor slab connection method in which only a part of the floor slab concrete and steel girders is made continuous is considered to be the only one. FIG. 9 shows an example of the no-joint floor slab connection structure. The pavement 5 at the ends of the bridge girders 1 and 1 is removed over a predetermined range, the floor slab 2 of the bridge girder is removed over a predetermined range, and the existing floor slab 2 is installed. A connecting reinforcing bar 80 is attached to the reinforcing bar 6 by welding, a resin concrete 81 is placed in the space between the floor slabs 2 and 2, and a paving body 5 such as asphalt is re-paved thereon. The ends of the upper flanges of the steel girders 3 are connected using a connecting steel plate 82, a splicing plate 83, and a filler plate 84. On the connecting steel plate 82 and the like, a styrofoam edge-cutting material 85 is arranged on the beam. Resist the elastic displacement of the connecting rebar 80 and the connecting steel plate 82 against the vertical rotation displacement (angular change, corner bending) and temperature shrinkage / expansion of the end of the beam.

また、本発明に関連する先行技術文献としては、特許文献1〜4がある。特許文献1の発明は、伸縮遊間上の両側にわたって骨材を含むアスファルト混合物からなる舗装を連続して施工するものであり、伸縮遊間を挟んで対向する橋体(橋桁や橋台) の端部の上に伸縮遊間を跨いでシート状の滑り層を布設し、この上に網状体を敷設し、その上に基層と表層からなるアスファルト混合物(ゴムアスファルトコンパウンド) を積層し、基層には応力を分散させてひび割れを防止するハニカムやエキスパンドメタル等の応力伝達部材を埋設し、基層と表層との間には、基層から表層に伝えられる応力を分散させてひび割れを防止する、メッシュ状の補強用繊維をアスファルト系材料内に埋設したひずみ分散シートを介挿したものである。   Moreover, there exist patent documents 1-4 as a prior art document relevant to this invention. In the invention of Patent Document 1, a pavement made of an asphalt mixture containing aggregate is continuously applied across both sides of an expansion / contraction gap, and an end of a bridge body (bridge girder or abutment) facing the gap between expansion / contraction gaps. A sheet-like sliding layer is laid over the stretchable space, a net is laid on top of this, and an asphalt mixture (rubber asphalt compound) consisting of a base layer and a surface layer is laminated thereon, and stress is distributed to the base layer. A mesh-like reinforcing fiber that embeds a stress transmission member such as a honeycomb or expanded metal to prevent cracks and disperses the stress transmitted from the base layer to the surface layer between the base layer and the surface layer to prevent cracking. Is inserted through a strain dispersion sheet embedded in an asphalt material.

特許文献2の発明は、伸縮遊間上の舗装部に埋設される埋設ジョイント部材であり、伸縮遊間を跨いでゴム製の埋設ジョイント部材を設置し、このゴム製の埋設ジョイント部材にはスチールコードまたは繊維コードを橋軸方向とバイアス方向に配設し、橋軸方向・橋軸直角方向・回転方向のひずみを分散できるようにし、この埋設ジョイント部材の両端部にはテンションバーを埋設し、このテンションバーをテンションボルトで橋体または陸上道路に固定し、この埋設ジョイント部材の中央部下面には埋設ジョイント部材が伸縮遊間に落ち込むのを防止する硬質板からなる荷重支持部材を埋設したものである。   The invention of Patent Document 2 is an embedded joint member that is embedded in a pavement on an expansion / contraction gap, and a rubber embedded joint member is installed across the expansion / contraction gap, and a steel cord or The fiber cords are arranged in the bridge axis direction and the bias direction so that the strain in the bridge axis direction, the bridge axis perpendicular direction, and the rotation direction can be dispersed, and tension bars are embedded at both ends of the embedded joint member. A bar is fixed to a bridge body or an overland road with a tension bolt, and a load supporting member made of a hard plate is embedded in the lower surface of the central portion of the embedded joint member to prevent the embedded joint member from falling between expansion and contraction.

特許文献3の発明は、道路橋等の橋面継手部の補修工法であり、床版対向端部間の既設継手部材を除去した部分に、遊間部をバックアップ材で封じた後、その上にシート状物を敷設してから、ジオテキスタイルと弾性樹脂を積層した弾性舗装体を形成するものである。   The invention of Patent Document 3 is a repair method of a bridge joint portion such as a road bridge, and after the existing joint member between the floor slab facing ends is removed, the idler portion is sealed with a backup material, and then on the portion. After laying the sheet-like material, an elastic pavement in which geotextile and elastic resin are laminated is formed.

特許文献4の発明は、埋設型伸縮継手の構造であり、対向する桁に目地遊間を跨いで中央部が垂下する弛みを有する可撓性の合成樹脂板を取付け、この上に相互摺動面を有するスライドプレート及びカバープレートをそれぞれ対向する桁に固着し、その上に埋戻し舗装材を載せたものである。   The invention of Patent Document 4 is a structure of an embedded expansion joint, and a flexible synthetic resin plate having a slack in which a central portion hangs across a gap between joints is attached to an opposite girder, and a mutual sliding surface is mounted thereon. A slide plate and a cover plate having slabs are fixed to opposite beams, and a backfill pavement is placed thereon.

特開平7−166506号公報JP 7-166506 A 特開平10−292316号公報JP-A-10-292316 特開平6−257105号公報JP-A-6-257105 特開平11−140821号公報JP-A-11-140821

特許文献2等の埋設ジョイント工法は、桁端の回転角、橋桁の伸縮を舗装直下の柔軟な部材により一定範囲内の一様なひずみとして分散させ、舗装自体のひび割れを一箇所に集中させないような配慮の元に構成されているが、頻繁な交通荷重の通過や制動荷重により、舗装下の柔軟な部材の変形により数年で劣化しており、その耐久性が維持できないことが明らかになってきた。   The buried joint method disclosed in Patent Document 2 distributes the rotation angle of the beam end and the expansion and contraction of the bridge beam as a uniform strain within a certain range by a flexible member directly under the pavement so as not to concentrate cracks in the pavement itself in one place. Although it is constructed based on careful consideration, it has become clear that it has deteriorated in several years due to deformation of flexible members under paving due to frequent passing of traffic load and braking load, and its durability cannot be maintained. I came.

床版コンクリートと鋼桁の一部のみを連続化した床版連結工法(図9)の場合、既設コンクリートの広くて深い範囲のはつり撤去、鋼桁の上フランジの接合、既設鉄筋同士の溶接、連結床版部分の縁切り、樹脂コンクリートの打設、再舗装など、手間と時間がかかり、一昼夜を越える交通止め作業が不可欠となっており、大々的な展開は困難となっている。   In the case of the floor slab connection method (Fig. 9) in which only a part of floor slab concrete and steel girders are continuous, removal of the wide and deep area of existing concrete, joining of upper flanges of steel girders, welding of existing reinforcing bars, It takes time and effort, such as cutting the edges of the connecting slabs, placing resin concrete, and re-paving, and it is indispensable to stop traffic for more than a day and night, making large-scale deployment difficult.

本発明は、橋梁の中間部または端部の不連続部に設けられるジョイント部の連続化構造において、交通荷重の載荷に伴う桁端の桁回転変位や温度変化等に伴う伸縮変形をジョイント部材の変形性能で吸収し、表層アスファルト舗装の早期劣化を回避しつつ、耐久性の向上により円滑な交通荷重の通過を可能とし、しかも短時間で施工が可能な橋梁ジョイント部の連続化構造を提供することを目的とする。   In the continuous structure of the joint part provided in the discontinuous part of the intermediate part or the end part of the bridge, the present invention is capable of subjecting the joint member to expansion / contraction deformation caused by a girder rotational displacement or a temperature change caused by the loading of the traffic load. Providing a continuous structure for bridge joints that absorbs deformation performance and avoids premature deterioration of the surface asphalt pavement, enables smooth passage of traffic loads by improving durability, and enables construction in a short time. For the purpose.

本発明の請求項1に係る発明は、橋梁の中間部または端部において橋体(橋桁や橋台)が遊間を挟んで対向配置されている不連続部の橋面を連続化する橋梁ジョイント部の連続化構造であり、遊間を挟んで対向する橋体端部の上部にそれぞれ切欠きを設けることによりジョイント部材の埋設空間が形成され、この埋設空間に高靭性繊維補強セメント複合材料(以下、高靭性FRCCと記載)からなり、上面から下面まで貫通する注入孔を有する版状のプレキャストジョイント部材が遊間を跨いで配置され、
このプレキャストジョイント部材の橋軸方向の両端部がそれぞれアンカー(アンカーボルトやアンカー鉄筋など)により橋体に定着され、埋設空間内のプレキャストジョイント部材下面の、橋体との間に、プレキャストジョイント部材の注入孔を通じて間詰材(樹脂モルタル等)が充填され、プレキャストジョイント部材上面が舗装材料(アスファルト等)で覆われていることを特徴とする橋梁ジョイント部の連続化構造である(図1〜図4参照)。プレキャストジョイント部材は、舗装体で覆われる。既設や新設の橋梁の連続化に適用される。
The invention according to claim 1 of the present invention is a bridge joint portion that makes a bridge surface of a discontinuous portion in which bridge bodies (bridge girders and abutments) face each other with a gap in the middle or end of the bridge. It is a continuous structure, and a notch is provided in the upper part of the bridge body end facing each other with a gap between them to form a buried space for the joint member. In this buried space, a high-toughness fiber-reinforced cement composite material (hereinafter referred to as a high-strength fiber composite material) toughness FRCC as described) Tona is, the plate-shaped precast joint member having an injection hole penetrating from the upper surface to the lower surface disposed across joint Gap,
Both ends of the precast joint member in the bridge axis direction are fixed to the bridge body by anchors (anchor bolts, anchor reinforcing bars, etc.), and the precast joint member lower surface of the precast joint member is buried between the bridge body and the lower surface of the precast joint member. It is a continuous structure of a bridge joint part characterized in that a filling material (resin mortar, etc.) is filled through the injection hole and the upper surface of the precast joint member is covered with a pavement material (asphalt, etc.) (FIGS. 1 to 1). 4). The precast joint member is covered with a pavement. Applicable for continuation of existing and new bridges.

本発明は、道路橋等のノージョイント化工法の一つである埋設ジョイント工法において、従来の埋設ジョイントの弱点である柔軟部材を、高靭性FRCCからなるプレキャストジョイント部材に置き換えることにより、交通荷重の載荷に伴う桁端の鉛直方向の桁回転変位(角変化、角折れ)、あるいは温度変化等に伴う伸縮変形を、同部材のひび割れ分散性能で吸収すると共に、同部材にはコンクリートと同程度の鉛直剛性があるため、交通荷重に対して周囲のコンクリート床版と同程度の変形特性を維持することで、表層舗装の局所的な破壊を防止できるようにしたものである。さらに、本構造は、従来の伸縮ジョイント部材と同様、プレキャスト部材で構成されていることから、従来の伸縮ジョイントの取換えが片側交通規制下において一晩で施工できた(既設の橋梁の場合)のと同様、短時間で施工可能なものである。   The present invention is a buried joint method that is one of no-joint methods for road bridges, etc., by replacing a flexible member, which is a weak point of a conventional buried joint, with a precast joint member made of high-toughness FRCC. The vertical displacement of the girders at the end of the girders (angular changes, angular breaks) due to loading or expansion / contraction deformation due to temperature changes, etc. are absorbed by the crack dispersal performance of the same member, and the same level of material as concrete Because it has vertical rigidity, it can prevent local destruction of the surface pavement by maintaining the same deformation characteristics as the surrounding concrete floor slab with respect to traffic load. Furthermore, because this structure is made up of precast members like conventional expansion joint members, replacement of conventional expansion joints could be performed overnight under one-side traffic restrictions (in the case of existing bridges). Like, it can be constructed in a short time.

高靭性FRCCは、ビニロン繊維やポリエチレン繊維等の非常に細くて強い化学繊維がセメントマトリクス中に3次元方向にランダムに分散配合され、見かけの引張ひずみが数%(2〜3%) に達するような靭性に富む材料である。このような材料で成形したプレキャストジョイント部材は、高い引張変形能力・曲げ変形能力を有し、また鉄筋コンクリートと同等の鉛直剛性を有する。   High toughness FRCC is such that extremely thin and strong chemical fibers such as vinylon fiber and polyethylene fiber are randomly dispersed and blended in the three-dimensional direction in the cement matrix, and the apparent tensile strain reaches several percent (2 to 3%). This material is rich in toughness. A precast joint member formed of such a material has high tensile deformation capacity and bending deformation capacity, and has vertical rigidity equivalent to that of reinforced concrete.

本発明の請求項2に係る発明は、請求項1に記載の橋梁ジョイント部の連続化構造において、プレキャストジョイント部材が橋体との間に、橋体上面側に連通する隙間を設けた状態で配置されていることを特徴とする橋梁ジョイント部の連続化構造である。
The invention according to claim 2 of the present invention is the continuous structure of the bridge joint part according to claim 1, wherein the precast joint member is provided with a gap communicating with the bridge body on the upper surface side of the bridge body. It is the continuous structure of the bridge joint part characterized by being arrange | positioned.

本発明の請求項に係る発明は、請求項1、もしくは請求項2に記載の橋梁ジョイント部の連続化構造において、プレキャストジョイント部材の橋軸方向の中央部における下部に凹部が設けられていることを特徴とする橋梁ジョイント部の連続化構造である。
According to a third aspect of the present invention, in the continuous structure of the bridge joint portion according to the first or second aspect , a concave portion is provided at a lower portion in the central portion of the precast joint member in the bridge axis direction. It is the continuous structure of the bridge joint part characterized by this.

橋梁ジョイント部には、隣接橋桁の支承条件が両方固定で、桁端の桁回転変位のみが作用する場合(図1参照)と、片側固定で片側移動あるいは両方移動で、桁端の桁回転変位と、伸縮変形とが作用する場合(図3参照)があり、図2(a)、(b)、図4(b)等に示すように、凹部による薄肉部の変形で桁回転変位や伸縮変形を吸収し、変位量が大きい場合は材料の非常に細かなひび割れに分散して変位を吸収する。図2(a)はアーチ型であり、変形はアーチ部で吸収され、車両荷重はアーチ効果により床版に伝達され、耐荷性能が保持される。図2(b)は、複数のスリットによるひび割れ分散型であり、複数のスリットによりひび割れが効果的に分散される。
At the bridge joint, both the support conditions of the adjacent bridge girder are fixed and only the girder's girder rotational displacement acts (see Fig. 1). And deformation (see FIG. 3), and as shown in FIGS. 2 (a), 2 (b), 4 (b), etc., the girder rotation displacement or expansion / contraction is caused by the deformation of the thin portion by the recess. Absorbs deformation, and when the amount of displacement is large, it disperses into very fine cracks in the material to absorb displacement. FIG. 2A shows an arch type, in which the deformation is absorbed by the arch portion, the vehicle load is transmitted to the floor slab by the arch effect, and the load resistance performance is maintained. FIG. 2B shows a crack dispersion type with a plurality of slits, and the cracks are effectively dispersed by the plurality of slits.

本発明の請求項は、請求項1、もしくは請求項2に記載の橋梁ジョイント部の連続化構造において、プレキャストジョイント部材の橋軸方向の中央部における下部に遊間に挿入される下方突起部が設けられていることを特徴とする橋梁ジョイント部の連続化構造である。
According to a fourth aspect of the present invention, in the continuous structure of the bridge joint portion according to the first or second aspect , the lower protrusion that is inserted in the gap in the lower portion of the central portion of the precast joint member in the bridge axis direction is provided. It is the continuous structure of the bridge joint part characterized by being provided.

図2(c)等に示すように、平板部の下に下方突起部を一体的に設けた場合であり、平板部の左右両側の2箇所に変形やひび割れを分散させることができ、また部材長手方向(橋軸直角方向)に連続する下方突起部により平板部の剛性が向上し、輪荷重を支持することができる。
As shown in FIG. 2 (c) and the like, it is a case where a lower protrusion is integrally provided under the flat plate portion, and deformation and cracks can be dispersed in two places on the left and right sides of the flat plate portion. The lower protrusion that is continuous in the longitudinal direction (the direction perpendicular to the bridge axis) improves the rigidity of the flat plate portion and can support the wheel load.

本発明の請求項は、請求項1、もしくは請求項2に記載の橋梁ジョイント部の連続化構造において、プレキャストジョイント部材が上下に分割され、上部プレキャストジョイント部材の橋軸方向の両端部がアンカーにより橋体に定着され、上部プレキャストジョイント部材の橋軸方向中央部の下に下部プレキャストジョイント部材が配置されていることを特徴とする橋梁ジョイント部の連続化構造である。
According to a fifth aspect of the present invention, in the continuous structure of the bridge joint portion according to the first or second aspect , the precast joint member is divided into upper and lower parts, and both end portions in the bridge axis direction of the upper precast joint member are anchors. This is a continuous structure of the bridge joint portion, which is fixed to the bridge body and the lower precast joint member is disposed under the central portion of the upper precast joint member in the bridge axial direction.

図3、図4(a)に示すように、プレキャストジョイント部材を上下分離型とした場合であり、上部プレキャストジョイント部材の薄肉部で桁端の桁回転変位や伸縮変形を吸収し、下部プレキャストジョイント部材で輪荷重を支持する。この下部プレキャストジョイント部材には下方突起部を設けるのが好ましい。
As shown in FIG. 3 and FIG. 4 (a), the precast joint member is a vertically separated type, and the thin part of the upper precast joint member absorbs the girder rotational displacement and expansion / contraction deformation of the lower precast joint member. The wheel load is supported by the member. The lower precast joint member is preferably provided with a lower protrusion.

請求項1から請求項までのいずれか一つに記載の橋梁ジョイント部の連続化構造において、プレキャストジョイント部材の上面に弾性体シート(繊維補強樹脂シート等)が貼設されている場合もある。図2(d)、(e)等に示すように、プレキャストジョイント部材の上面や両側面を弾性体シートにより補強することで、弾性体シートによる復元特性でひび割れが閉じる効果と、舗装体への影響を軽減する効果が得られる。 In continuous structures of the bridge joint according to any one of claims 1 to 5, in some cases the flexure on the upper surface of the precast joint member sheet (fiber reinforced resin sheet or the like) is affixed . As shown in FIGS. 2 (d), 2 (e), etc., by reinforcing the upper surface and both side surfaces of the precast joint member with an elastic sheet, the effect of closing cracks with the restoring characteristics of the elastic sheet, The effect of reducing the effect is obtained.

以上のような構成のプレキャストジョイント部材の高靭性FRCCは、適切に配合されたビニロン繊維やポリエチレン繊維等と、セメント、細骨材からなる複合材料であり、従来のセメント材料の常識を超える引張変形能力・曲げ変形能力を有する。例えば、3%の純引張ひずみ(鋼材の降伏ひずみの20倍相当)でも耐力を維持できる。モルタルや既存の繊維補強コンクリート(FRC)では、初期クラックが生じると、このクラックが拡大してそのまま破壊されてしまうが、高靭性FRCCは、繊維によるクラックの架橋能力が高く、増加する引張荷重が繊維により負担されるため、初期ひび割れが破壊につながらず、次のひび割れが生じ、次々とこの連鎖が続き、微小なひび割れが細かく分散され、結果的に非常に大きな引張ひずみが生じて、荷重に耐えることができる。   High-toughness FRCC of precast joint members configured as described above is a composite material consisting of vinylon fiber, polyethylene fiber, etc., blended appropriately with cement and fine aggregate, and has a tensile deformation exceeding the common sense of conventional cement materials Ability and bending deformation ability. For example, the proof stress can be maintained even at 3% pure tensile strain (equivalent to 20 times the yield strain of steel). In mortar and existing fiber reinforced concrete (FRC), if an initial crack occurs, this crack expands and breaks as it is. However, high-toughness FRCC has a high ability to crosslink cracks due to fibers, and an increased tensile load. Since it is borne by the fiber, the initial crack does not lead to fracture, the next crack is generated, this chain continues one after another, and the minute cracks are finely dispersed, resulting in a very large tensile strain, resulting in a load Can withstand.

本材料により制作されたプレキャストジョイント部材で橋桁の端部同士を連結し、その上を一般部と同様に舗装することで、見かけは一様な路面を現出させることができる。桁端の桁回転変位や伸縮変位は、両方の桁に固定された高靭性FRCCのプレキャストジョイント部材が負担し、変位量が大きい場合は非常に細かなひび割れに分散して変位を吸収することから、舗装自体の柔軟な追随性の範囲内に局所ひずみを抑制でき、舗装体の破壊を免れるという性能を発揮する。   By connecting the ends of the bridge girders with precast joint members made of this material and paving the same as the general part, it is possible to make the road surface appear uniform. Girder rotation displacement and expansion displacement at the end of the beam are borne by the high-toughness FRCC precast joint member fixed to both beams, and if the displacement is large, it is dispersed into very fine cracks to absorb the displacement The local strain can be suppressed within the range of the flexible followability of the pavement itself, and the performance of avoiding the destruction of the pavement is exhibited.

また、高靭性FRCCの部材の鉛直剛性は、RC床版の剛性と殆ど変わりないことから、急激な剛性変化に伴う段差の発生や舗装の劣化、すり減りを発生させる原因とはなり難い。   Further, since the vertical rigidity of the high-toughness FRCC member is almost the same as the rigidity of the RC floor slab, it is difficult to cause a step due to a sudden change in rigidity, pavement deterioration, or abrasion.

本発明は、以上のような構成からなるので、次のような効果が得られる。
(1)高靭性FRCCからなるプレキャストジョイント部材で橋桁の端部同士を連結し、その上を一般部と同様に舗装することで、連続した路面を現出させることができ、桁端の桁回転変位や伸縮変形はプレキャストジョイント部材で負担し、変位量が大きい場合は非常に細かいひび割れに分散して変位を吸収することができるため、舗装自体の柔軟な追随性の範囲内に局所ひずみを抑制でき、舗装の破壊を回避することができ、舗装の早期劣化を回避しつつ、耐久性の向上により円滑な交通荷重の通過が可能となる。
(2)高靭性FRCCの鉛直剛性はRC床版の剛性と殆ど変わりないことから、急激な剛性変化に伴う段差の発生や舗装の劣化、すり減りを発生する原因とはなり難く、結果的に舗装の長寿命化に貢献する。
(3)ジョイント部材はプレキャスト部材であるため、短時間で施工が可能であり、既設の橋梁の場合には、一晩でノージョイント化が可能となる。
Since the present invention is configured as described above, the following effects can be obtained.
(1) By connecting the ends of the bridge girders with precast joint members made of high toughness FRCC and paving the same as the general part, a continuous road surface can be revealed, and the girders at the end of the girders are rotated. Displacement and expansion / contraction deformation are borne by the precast joint member, and when the displacement is large, the displacement can be absorbed by being dispersed into very fine cracks, so local strain is suppressed within the flexible followability of the pavement itself. It is possible to avoid the destruction of the pavement, and it is possible to smoothly pass the traffic load by improving the durability while avoiding the early deterioration of the pavement.
(2) Since the vertical rigidity of high-toughness FRCC is almost the same as that of RC floor slabs, it is unlikely to cause steps due to sudden changes in rigidity, pavement deterioration, or abrasion, resulting in paving. Contributes to longer life.
(3) Since the joint member is a precast member, it can be constructed in a short time, and in the case of an existing bridge, it can be jointed overnight.

以下、本発明を図示する実施形態に基づいて説明する。この実施形態は、既設の鋼桁床版構造の橋梁の連続化に適用した例である。新設の橋梁の連続化にも適用することができる。また、鋼桁床版に限らず、その他の型式の橋梁にも適用できる。また、連続する橋桁と橋桁のジョイント部について例示しているが、橋桁と橋台とのジョイント部についても同様である。   Hereinafter, the present invention will be described based on the illustrated embodiments. This embodiment is an example applied to continuation of a bridge having an existing steel girder slab structure. It can also be applied to the continuation of new bridges. Moreover, it is applicable not only to steel girder slabs but also to other types of bridges. Moreover, although illustrated about the joint part of a continuous bridge girder and a bridge girder, it is the same also about the joint part of a bridge girder and an abutment.

図1は、本発明の橋梁ジョイント部の連続化構造であり、隣接橋桁の支承条件が両方とも固定支承による固定(F―F)の場合の一実施形態を示す鉛直断面図である。図2は、図1の連続化構造で用いられるジョイント部材の種々の形態を示す鉛直断面図である。図3は、隣接橋桁の支承条件が固定支承による片方固定・可動支承による片方移動(F−M)あるいは両方移動(M−M)の場合の一実施形態を示す鉛直断面図である。図4は、図3の連続化構造で用いられるジョイント部材の種々の形態を示す鉛直断面図である。図5は、図1の連続化構造の詳細を示す橋軸方向に平行な鉛直断面図、平面図、橋軸直角方向に平行な鉛直断面図である。図6は、図1で用いられるジョイント部材の詳細を示す幅方向に平行な鉛直断面図、長手方向に平行な鉛直断面図、底面図である。図7は、実際に行った連続化構造の例を示す鉛直断面図である。   FIG. 1 is a vertical cross-sectional view showing an embodiment in which the bridge joint portion according to the present invention is a continuous structure, and the support conditions of adjacent bridge girders are both fixed by fixed support (FF). FIG. 2 is a vertical sectional view showing various forms of the joint member used in the continuous structure of FIG. FIG. 3 is a vertical cross-sectional view showing an embodiment in the case where the support condition of the adjacent bridge girder is one-way fixed (F-M) or both-moving (MM) by one-way fixed / movable support. FIG. 4 is a vertical sectional view showing various forms of the joint member used in the continuous structure of FIG. FIG. 5 is a vertical sectional view parallel to the bridge axis direction, a plan view, and a vertical sectional view parallel to the direction perpendicular to the bridge axis, showing details of the continuous structure of FIG. 6 is a vertical sectional view parallel to the width direction, a vertical sectional view parallel to the longitudinal direction, and a bottom view showing details of the joint member used in FIG. FIG. 7 is a vertical sectional view showing an example of a continuous structure actually performed.

図1において、橋桁1は鉄筋コンクリート(RC)床版2と鋼桁3から構成され、RC床版2とRC床版2とが遊間4をおいて対向配置されており、隣接するRC床版2、2の上部にそれぞれ切欠き10を設け、2つの切欠き10で形成された埋設空間11に高靭性FRCC(High Performance Fiber Reinforced Cementitious Composites)からなる版状のプレキャストジョイント部材(以下、PCaジョイント部材と記載)12を遊間4を跨いで配置し、このPCaジョイント部材12の橋軸方向の両端部をそれぞれアンカーボルト13等によりRC床版2に定着する。遊間4の上部はウレタンフォーム等のバックアップ材14で閉塞し、PCaジョイント部材12に設けた注入孔15からPCaジョイント部材12とRC床版2との間の隙間に樹脂モルタル等の間詰材16を充填する。PCaジョイント部材12の上面には防水シート17等を設け、アスファルト混合物等からなる舗装体5で覆うことにより、橋面が連続化される。   In FIG. 1, a bridge girder 1 is composed of a reinforced concrete (RC) slab 2 and a steel girder 3. The RC slab 2 and the RC slab 2 are arranged to face each other with a gap 4 therebetween. 2 is provided with a notch 10 at the top of the plate 2 and a precast joint member (hereinafter referred to as a PCa joint member) made of high tough FRCC (High Performance Fiber Reinforced Cementitious Composites) in the embedded space 11 formed by the two notches 10. And 12) are arranged across the gap 4 and both ends of the PCa joint member 12 in the bridge axis direction are fixed to the RC floor slab 2 by anchor bolts 13 or the like. The upper part of the gap 4 is closed with a backup material 14 such as urethane foam, and a filling material 16 such as resin mortar is inserted into a gap between the PCa joint member 12 and the RC floor slab 2 through an injection hole 15 provided in the PCa joint member 12. Fill. A waterproof sheet 17 or the like is provided on the upper surface of the PCa joint member 12, and the bridge surface is made continuous by covering with a pavement 5 made of an asphalt mixture or the like.

既設の橋梁の場合、舗装体5を所定範囲にわたって撤去し、RC床版2の上部を所定範囲にわたって部分的にはつり、埋設空間11内に突出するRC床版2の上部の既設鉄筋6を切断除去し、この埋設空間11内にアンカー工を施工した後、PCaジョイント部材12を設置する。次いで、間詰材16の注入工、防水工を施工し、その上に舗装体5を再舗装して完了する。急速施工が可能であり、片側交通規制下において一晩でノージョイント化施工が可能となる。   In the case of an existing bridge, the pavement 5 is removed over a predetermined range, the upper part of the RC floor slab 2 is partially suspended over the predetermined range, and the existing reinforcing bar 6 above the RC floor slab 2 protruding into the embedded space 11 is cut. After removing and constructing an anchor in the buried space 11, the PCa joint member 12 is installed. Next, the filling material 16 and the waterproofing work for the filling material 16 are applied, and then the paved body 5 is re-paved to complete. Rapid construction is possible, and no-joint construction is possible overnight under traffic restrictions on one side.

高靱性FRCCは、セメント・水・砂等の通常のモルタルに用いる材料のマトリクスに、ビニロンやポリエチレン等の非常に細くて強い化学繊維を3次元方向にランダムに分散配合したものであり、従来のセメント材料の常識を超える引張変形能力(伸び性能) と曲げ変形能力を有する材料である。例えば、3%の純引張ひずみ(鋼材降伏ひずみの20倍) でも耐力を維持することができる。   High toughness FRCC is a matrix of materials used for ordinary mortar such as cement, water, sand, etc., which is a very thin and strong chemical fiber such as vinylon or polyethylene that is randomly dispersed in a three-dimensional direction. This material has tensile deformation capacity (elongation performance) and bending deformation capacity that exceed the common sense of cement materials. For example, the proof stress can be maintained even with a pure tensile strain of 3% (20 times the steel yield strain).

このような高靱性化のメカニズムは以下の通りである。即ち、モルタルや既存のFRC材料では、初期クラックが生じると、このクラックが拡大してそのまま破壊してしまう。しかし、高靱性FRCCでは、繊維によるクラックの架橋能力が高く、増加する引張外力が繊維により負担されるため、初期ひび割れが破壊につながることなく、次のひび割れが発生する。引き続き、次々と新たな微小なひび割れが多数発生し、見かけ上、非常に大きな引張ひずみが生じても荷重に耐えることができる。   Such a toughening mechanism is as follows. That is, in the mortar and the existing FRC material, when an initial crack occurs, the crack expands and is destroyed as it is. However, in the high toughness FRCC, the ability to crosslink cracks by fibers is high, and an increasing tensile external force is borne by the fibers, so that the initial crack does not lead to breakage and the next crack occurs. Subsequently, many new fine cracks are generated one after another, and even if an apparently large tensile strain occurs, it can withstand the load.

応力−ひずみ線図において、通常のモルタルや既存の鋼繊維のFRC材料は、鋼材のような降伏棚がないが、ビニロン繊維等の高靱性FRCCは所定の引張力に対して引張ひずみが増大する降伏棚を有しており、2〜3%の見かけの引張ひずみが得られる。   In the stress-strain diagram, normal mortar and existing steel fiber FRC materials do not have a yield shelf like steel, but high-toughness FRCC such as vinylon fiber increases tensile strain for a given tensile force. It has a yield shelf and an apparent tensile strain of 2-3% is obtained.

本材料でPCaジョイント部材12が製作されるが、その形状は次のようなものが考えられる。図1は、隣接する橋桁1、1の支承条件が固定支承によるF−Fであるため、温度変化に伴う桁端の伸縮は無く、交通荷重の載荷に伴う桁端の鉛直方向の桁回転変位(角変化、角折れ)と移動成分のみが作用する連続化構造である。従って、図1の連続化構造に用いられるPCaジョイント部材12の断面形状は、図2(a)に示すように、橋軸方向の中央部における下部に凹部20が形成され、アーチ型とされている。中央部が薄肉部21とされ、両端部に厚肉部22が設けられている。上面はフラットであり、両端面には、下方に向かって狭まる傾斜面23が形成され、荷重が集中して伝達されるようにしている。   Although the PCa joint member 12 is manufactured with this material, the shape is considered as follows. FIG. 1 shows that the support condition of the adjacent bridge girders 1 and 1 is FF by fixed support, so there is no expansion and contraction of the girder end due to temperature change, and the girder end vertical displacement of the girder end due to the load of traffic load. It is a continuous structure in which only (angular changes, corner breaks) and moving components act. Accordingly, the cross-sectional shape of the PCa joint member 12 used in the continuous structure of FIG. 1 is formed as an arch shape with a recess 20 formed in the lower part of the central part in the bridge axis direction as shown in FIG. Yes. The central portion is a thin portion 21 and thick portions 22 are provided at both ends. The upper surface is flat, and inclined surfaces 23 narrowing downward are formed on both end surfaces so that loads are concentrated and transmitted.

この図1、図2(a)のアーチ型のPCaジョイント部材12において、桁端の桁回転変位は、高靱性FRC材料のアーチ部の変形で吸収する。変位量が大きい場合は、非常に細かなひび割れに分散して変位を吸収する。車両荷重はアーチ効果によりRC床版2に伝達される。高靱性FRCCは鉄筋コンクリートと同程度の鉛直剛性を有し、舗装体5の局所的な破壊が回避される。   In the arch type PCa joint member 12 shown in FIGS. 1 and 2A, the spar rotational displacement at the spar end is absorbed by deformation of the arch portion of the high toughness FRC material. When the amount of displacement is large, the displacement is dispersed by dispersing in very fine cracks. The vehicle load is transmitted to the RC floor slab 2 by the arch effect. The high toughness FRCC has a vertical rigidity comparable to that of reinforced concrete, and local destruction of the pavement 5 is avoided.

図2(b)は、凹部20の上面に複数のスリット24を鋸歯状に形成したひび割れ分散型のPCaジョイント部材12である。図2(a)のアーチ型と同様の作用効果が得られるほか、複数のスリット24によりひび割れを効果的に分散させることができる。   FIG. 2B shows a crack-dispersed PCa joint member 12 in which a plurality of slits 24 are formed in a sawtooth shape on the upper surface of the recess 20. In addition to the same effect as the arch type in FIG. 2A, cracks can be effectively dispersed by the plurality of slits 24.

図2(c)は、上部の平板部25の橋軸方向の中央部における下面に、下方に突出して遊間4に挿入される下方突起部26を設けたT型のPCaジョイント部材12である。桁端の桁回転変位を高靱性FRCCの平板部25の左右両側の変形で吸収すると共に、ひび割れを平板部25の左右両側の2箇所に分散させることができる。下方突起部26は、橋軸直角方向に連続する部材であり、薄肉部の剛性を高め、輪荷重を支持し、平板部25・舗装体5を平坦に保持することができる。   FIG. 2C shows the T-type PCa joint member 12 provided with a lower protrusion 26 that protrudes downward and is inserted into the gap 4 on the lower surface of the central portion of the upper flat plate portion 25 in the bridge axis direction. The spar rotational displacement at the end of the spar can be absorbed by the deformation on both the left and right sides of the flat plate portion 25 of the high toughness FRCC, and the cracks can be dispersed at the two left and right sides of the flat plate portion 25. The lower protrusion 26 is a member that is continuous in the direction perpendicular to the bridge axis, and can increase the rigidity of the thin portion, support the wheel load, and hold the flat plate portion 25 and the pavement 5 flat.

図2(d)、(e)は、上記のPCaジョイント部材12の上面・側面を繊維補強樹脂シート等の弾性体シート50で補強する例であり、弾性体シート50による復元特性でひび割れが閉じる効果と、舗装体5への影響を軽減する効果が得られる。   FIGS. 2D and 2E are examples in which the upper and side surfaces of the PCa joint member 12 are reinforced with an elastic sheet 50 such as a fiber-reinforced resin sheet, and cracks are closed by the restoring characteristics of the elastic sheet 50. FIG. The effect and the effect which reduces the influence on the pavement 5 are acquired.

次に、図3は、隣接する橋桁1、1の支承条件が片方固定、片方移動のF−M、あるいは両方移動のM−Mであるため、桁端の桁回転変位と共に、温度変化等に伴う桁端の伸縮が作用する部位での連続化構造である。従って、図3の連続化構造に用いられるPCaジョイント部材12は、上下に2分割した分離型とされ、上部のPCaジョイント部材30で変形を吸収し、下部のPCaジョイント部材31で輪荷重を支持する構成とされている。   Next, in FIG. 3, since the support conditions of the adjacent bridge girders 1 and 1 are fixed on one side, FM on one side, or M-M on both sides, the change in temperature at the end of the girder, etc. It is a continuous structure at the site where the expansion and contraction of the accompanying girder acts. Therefore, the PCa joint member 12 used in the continuous structure shown in FIG. 3 is divided into two parts, one above the other. The upper PCa joint member 30 absorbs deformation and the lower PCa joint member 31 supports the wheel load. It is supposed to be configured.

上部のPCaジョイント部材30は、図4(a)に示すように、橋軸方向の中央部が薄肉部32とされ、両端部に厚肉部33が設けられている。薄肉部32の下面には鋸歯状のスリット34が設けられている。下部のPCaジョイント部材31は、薄肉部32の下の凹部内に配置される平板部35と、遊間4に挿入される下方突起部36からT型に形成されている。厚肉部33には、アンカーとしての定着鉄筋37が予め設けられおり、床版埋込み筋38(図3参照)を介してRC床版2に定着される。なお、上部の薄肉部32と下部の平板部35との間には、発泡スチロール等の下面縁切り材39が配置されている。   As shown in FIG. 4A, the upper PCa joint member 30 has a central portion in the bridge axis direction as a thin portion 32 and thick portions 33 at both ends. A serrated slit 34 is provided on the lower surface of the thin portion 32. The lower PCa joint member 31 is formed in a T shape from a flat plate portion 35 disposed in a recessed portion below the thin portion 32 and a lower projection portion 36 inserted into the gap 4. A fixing reinforcing bar 37 as an anchor is provided in the thick portion 33 in advance, and is fixed to the RC floor slab 2 via a floor slab embedded bar 38 (see FIG. 3). Note that a lower surface edge cutting member 39 such as polystyrene foam is disposed between the upper thin portion 32 and the lower flat plate portion 35.

この図3、図4(a)の分離型のPCaジョイント部材12において、桁端の鉛直方向の桁回転変位及び温度変化等に伴う引張変形は、高靱性FRCCの上部PCaジョイント部材30の薄肉部32の変形で吸収する。変位量が大きい場合は、非常に細かなひび割れに分散して変位を吸収する。車両荷重は下部PCaジョイント部材31によりRC床版2に伝達される。高靱性FRCCはコンクリートと同程度の鉛直剛性を有し、さらに薄肉部32が下部PCaジョイント部材31でバックアップされているため、舗装体5の局所的な破壊が回避される。なお、温度変化等に伴う圧縮変形は、遊び分を上部PCaジョイント部材30が負担し、最終的に下部PCaジョイント部材31の下方突起部36が負担する。   In the separation type PCa joint member 12 of FIG. 3 and FIG. 4A, the tensile deformation accompanying the girder rotational displacement and temperature change in the vertical direction of the girder end is caused by the thin portion of the upper PCa joint member 30 of the high toughness FRCC. Absorbs with 32 deformations. When the amount of displacement is large, the displacement is dispersed by dispersing in very fine cracks. The vehicle load is transmitted to the RC floor slab 2 by the lower PCa joint member 31. The high toughness FRCC has the same vertical rigidity as that of concrete, and the thin portion 32 is backed up by the lower PCa joint member 31, so that local destruction of the pavement 5 is avoided. In addition, the compression deformation accompanying a temperature change etc. bears a play part by the upper PCa joint member 30, and finally the lower projection part 36 of the lower PCa joint member 31 bears.

図4(b)は、一体型のPCaジョイント部材12であり、図4(a)の薄肉部32を厚肉の平板部40とすることにより、輪荷重支持の下部PCaジョイント部材31を省略できるようにしたものである。この場合、RC床版2の切欠き10の形状を工夫し、定着部41に厚みと同じ深さの凹部を形成することで、定着鉄筋37等を最小化することができる。   FIG. 4B shows the integrated PCa joint member 12, and the lower PCa joint member 31 for supporting the wheel load can be omitted by making the thin-walled portion 32 of FIG. 4A a thick flat-plate portion 40. It is what I did. In this case, the fixing reinforcing bar 37 and the like can be minimized by devising the shape of the notch 10 of the RC floor slab 2 and forming a concave portion having the same depth as the thickness in the fixing portion 41.

図4(c)では、図4(a)の薄肉部32の中央部における下部に下方突起部36を設けることにより、輪荷重支持の下部PCaジョイント部材31を省略している。さらに、隣接するRC床版2、2の下面に繊維補強樹脂シート等の弾性体シート51を貼付け、桁端移動制限工として変位を制御することもできる。   4C, the lower PCa joint member 31 for supporting the wheel load is omitted by providing a lower protrusion 36 at the lower portion of the central portion of the thin portion 32 of FIG. 4A. Furthermore, the elastic sheet 51 such as a fiber reinforced resin sheet can be attached to the lower surfaces of the adjacent RC floor slabs 2 and 2 so that the displacement can be controlled as a girder end movement limiting work.

次に、図5、図6の具体的な実施例において、PCaジョイント部材12は、図6に示すように、幅が60cm程度、長さが1m程度の版であり、両側の厚肉部22にボルト孔18が長手方向に間隔をおいて千鳥状に配置されている。このボルト孔18は、長手方向に長い長孔とされ、アンカーボルト13の設置誤差を吸収できるようにされている。アンカーボルト13は、図5に示すように、場所打ちアンカーであり、例えばケミカルアンカーが用いられる。施工に際しては、図5に示すように、RC床版2を橋軸直角方向に二分割し、片側交通規制下で、一次施工、二次施工を行い、一晩で施工を完了することができる。   5 and FIG. 6, the PCa joint member 12 is a plate having a width of about 60 cm and a length of about 1 m, as shown in FIG. Bolt holes 18 are arranged in a staggered manner at intervals in the longitudinal direction. The bolt hole 18 is a long hole extending in the longitudinal direction so that an installation error of the anchor bolt 13 can be absorbed. As shown in FIG. 5, the anchor bolt 13 is a cast-in-place anchor, and for example, a chemical anchor is used. At the time of construction, as shown in FIG. 5, the RC floor slab 2 is divided into two in the direction perpendicular to the bridge axis, and the primary construction and the secondary construction can be performed under the traffic restriction on one side, and the construction can be completed overnight. .

また、図7は、実際に行った施工例であり、PCaジョイント部材12は、幅が60cm程度、長さが2m程度の薄い版であり、両端部と中央部に厚肉部22が設けられている。高靭性FRCCの内部には金網が補強材として埋設されている。上面はフラットであり、両端部の上面には外に向かって下り勾配の傾斜面が形成されている。RC床版2の上部は2段ではつられており、中央部が深い埋設空間11が形成される。   FIG. 7 shows an actual construction example. The PCa joint member 12 is a thin plate having a width of about 60 cm and a length of about 2 m. Thick portions 22 are provided at both ends and the center. ing. Inside the high toughness FRCC, a wire mesh is embedded as a reinforcing material. The upper surface is flat, and inclined surfaces having a downward slope are formed on the upper surfaces of both ends. The upper part of the RC floor slab 2 is connected in two steps, and a buried space 11 having a deep central part is formed.

両端部の厚肉部22がアンカーボルト13によりRC床版2に定着され、中央部の厚肉部22や薄肉部21に設けられた注入孔15から間詰材(超早強モルタル)16が充填される。中央部の厚肉部22には定着鉄筋37が設けられている。薄肉部21の下面には縁切りシート39が設けられている。PCaジョイント部材12の上面からRC床版2の上面にかけて防水シート17が設けられ、この上に舗装体5が再舗装される。   The thick wall portions 22 at both ends are fixed to the RC floor slab 2 by the anchor bolts 13, and the filling material (ultra-early strong mortar) 16 is inserted from the injection holes 15 provided in the thick wall portion 22 or the thin wall portion 21 at the center portion. Filled. A fixing reinforcing bar 37 is provided in the thick portion 22 at the center. An edge cutting sheet 39 is provided on the lower surface of the thin portion 21. A waterproof sheet 17 is provided from the upper surface of the PCa joint member 12 to the upper surface of the RC floor slab 2, and the pavement 5 is re-paved thereon.

本発明の橋梁ジョイント部の連続化構造であり、隣接橋桁の支承条件が両方とも固定支承による固定(F―F)の場合の一実施形態を示す鉛直断面図である。It is a continuous structure of the bridge joint part of this invention, and is a vertical sectional view which shows one Embodiment in case the support conditions of an adjacent bridge girder are both fixed by fixed support (FF). 図1の連続化構造で用いられるジョイント部材の種々の形態を示す鉛直断面図である。It is a vertical sectional view which shows the various forms of the joint member used with the continuous structure of FIG. 本発明の橋梁ジョイント部の連続化構造であり、隣接橋桁の支承条件が固定支承による片方固定・可動支承による片方移動(F−M)あるいは両方移動(M−M)の場合の一実施形態を示す鉛直断面図である。One embodiment of the present invention is the continuous structure of the bridge joint portion of the present invention, in which the support condition of the adjacent bridge girder is one-way fixed (F-M) or fixed-movable one-way movement (F-M) or both movements (MM). FIG. 図3の連続化構造で用いられるジョイント部材の種々の形態を示す鉛直断面図である。It is a vertical sectional view which shows the various forms of the joint member used with the continuous structure of FIG. 図1の連続化構造の詳細であり、(a)は橋軸方向に平行な鉛直断面図、(b)は平面図、(c)は橋軸直角方向に平行な鉛直断面図である。It is the detail of the continuous structure of FIG. 1, (a) is a vertical sectional view parallel to the bridge axis direction, (b) is a plan view, and (c) is a vertical sectional view parallel to the direction perpendicular to the bridge axis. 図1で用いられるジョイント部材の詳細であり、(a)は幅方向に平行な鉛直断面図、(b)は長手方向に平行な鉛直断面図、(c)は底面図である。It is the detail of the joint member used in FIG. 1, (a) is a vertical sectional view parallel to the width direction, (b) is a vertical sectional view parallel to the longitudinal direction, and (c) is a bottom view. 実際に行った連続化構造の例を示す鉛直断面図である。It is a vertical sectional view showing an example of a continuous structure actually performed. 従来の伸縮ジョイントによる連続化構造を示す鉛直断面図である。It is a vertical sectional view showing a continuous structure with a conventional expansion joint. 従来のノージョイト化床版連結構造を示す鉛直断面図である。It is a vertical sectional view showing a conventional no-joint floor slab connection structure.

符号の説明Explanation of symbols

1……橋桁
2……鉄筋コンクリート床版(RC床版)
3……鋼桁
4……遊間
5……舗装体
6……既設鉄筋
10……切欠き
11……埋設空間
12……プレキャストジョイント部材(PCaジョイント部材)
13……アンカーボルト
14……バックアップ材
15……注入孔
16……間詰材
17……防水シート
18……ボルト孔
20……凹部
21……薄肉部
22……厚肉部
23……傾斜面
24……スリット
25……平板部
26……下方突起部
30……上部PCaジョイント部材
31……下部PCaジョイント部材
32……薄肉部
33……厚肉部
34……スリット
35……平板部
36……下方突起部
37……定着鉄筋
38……床版埋込み筋
39……下面縁切り材(シート)
40……平板部
41……定着部
50……弾性体シート
51……弾性体シート
1 …… Bridge girder 2 …… Reinforced concrete floor slab (RC floor slab)
3 …… Steel Girder 4 …… Sleeve 5 …… Pavement 6 …… Existing Rebar 10 …… Notch 11 …… Built Space 12 …… Precast Joint Member (PCa Joint Member)
13 ... Anchor bolt 14 ... Backup material 15 ... Filling hole 16 ... Filling material 17 ... Waterproof sheet 18 ... Bolt hole 20 ... Recess 21 ... Thin part 22 ... Thick part 23 ... Inclined Surface 24 ... Slit 25 ... Flat plate part 26 ... Lower projection part 30 ... Upper PCa joint member 31 ... Lower PCa joint member 32 ... Thin part 33 ... Thick part 34 ... Slit 35 ... Flat part 36 …… Lower protrusion 37 …… Fixing rebar 38 …… Floor slab embedding bar 39 …… Lower surface edge cutting material (sheet)
40 ... Flat plate part 41 ... Fixing part 50 ... Elastic sheet 51 ... Elastic sheet

Claims (5)

橋梁の中間部または端部において橋体が遊間を挟んで対向配置されている不連続部の橋面を連続化する橋梁ジョイント部の連続化構造であり、遊間を挟んで対向する橋体端部の上部にそれぞれ切欠きを設けることによりジョイント部材の埋設空間が形成され、この埋設空間に高靭性繊維補強セメント複合材料からなり、上面から下面まで貫通する注入孔を有する版状のプレキャストジョイント部材が前記遊間を跨いで配置され、
このプレキャストジョイント部材の橋軸方向の両端部がそれぞれアンカーにより橋体に定着され、前記埋設空間内のプレキャストジョイント部材下面の、前記橋体との間に、前記プレキャストジョイント部材の前記注入孔を通じて間詰材が充填され、プレキャストジョイント部材上面が舗装材料で覆われていることを特徴とする橋梁ジョイント部の連続化構造。
It is a continuous structure of the bridge joint part that makes the bridge surface of the discontinuous part where the bridge body is arranged facing the gap in the middle part or end part of the bridge, and the bridge body end part that faces the gap are each embedded space of the joint member by providing a notch in the top of the formation, Ri Do from high toughness fiber reinforced cement composite materials in this embedding space, plate-shaped precast joint member having an injection hole penetrating from an upper surface to a lower surface There is disposed across the Joint Gap,
During this both ends of the bridge axis direction of the precast joint member is fixed to the bridge body by the anchor each of the precast joint member lower surface of the embedded space, between the bridge member, through said injection hole of said precast joint member A continuous structure of a bridge joint, which is filled with a filler and the upper surface of a precast joint member is covered with a pavement material.
前記プレキャストジョイント部材は前記橋体との間に、前記橋体上面側に連通する隙間を設けた状態で配置されていることを特徴とする請求項1に記載の橋梁ジョイント部の連続化構造。 2. The continuous structure of a bridge joint portion according to claim 1, wherein the precast joint member is disposed with a gap communicating with the bridge body on the upper surface side of the bridge body . プレキャストジョイント部材の橋軸方向の中央部における下部に凹部が設けられていることを特徴とする請求項1、もしくは請求項2に記載の橋梁ジョイント部の連続化構造。 The continuous structure of the bridge joint part according to claim 1 , wherein a recess is provided in a lower part of a central part of the precast joint member in the bridge axis direction. プレキャストジョイント部材の橋軸方向の中央部における下部に遊間に挿入される下方突起部が設けられていることを特徴とする請求項1、もしくは請求項2に記載の橋梁ジョイント部の連続化構造。 The continuous structure of a bridge joint part according to claim 1 , wherein a lower protrusion is provided at a lower part in a central part of the precast joint member in the bridge axis direction. プレキャストジョイント部材が上下に分割され、上部プレキャストジョイント部材の橋軸方向の両端部がアンカーにより橋体に定着され、上部プレキャストジョイント部材の橋軸方向中央部の下に下部プレキャストジョイント部材が配置されていることを特徴とする請求項1、もしくは請求項2に記載の橋梁ジョイント部の連続化構造。
The precast joint member is divided into upper and lower parts, both ends in the bridge axis direction of the upper precast joint member are fixed to the bridge body by anchors, and the lower precast joint member is arranged below the center part in the bridge axis direction of the upper precast joint member. The continuous structure of the bridge joint part according to claim 1 , wherein the bridge joint part is a continuous structure.
JP2006141079A 2006-05-22 2006-05-22 Continuous structure of bridge joints Expired - Fee Related JP4675826B2 (en)

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