JP5043879B2 - How to install width expansion materials for road bridges - Google Patents

How to install width expansion materials for road bridges Download PDF

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JP5043879B2
JP5043879B2 JP2009076051A JP2009076051A JP5043879B2 JP 5043879 B2 JP5043879 B2 JP 5043879B2 JP 2009076051 A JP2009076051 A JP 2009076051A JP 2009076051 A JP2009076051 A JP 2009076051A JP 5043879 B2 JP5043879 B2 JP 5043879B2
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road bridge
plate
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width
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JP2010121434A (en
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正 佐野
祐樹 安東
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Sho Bond Corp
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本発明は、コンクリート床版からなる道路橋の道路橋用幅員拡張材の設置方法に関するものである。 The present invention relates to a method for installing a width extension material for a road bridge of a road bridge made of a concrete floor slab.

旧道路構造令で設計・施工された道路橋は、通行車両の大型化等による幅員の不足が指摘されると共に、緊急車両走行用の路肩や歩行者用の歩道の確保も困難なことから、安全かつ円滑な交通を維持するために幅員の拡張が急務となっている。また、道路整備が進み路肩の確保などにより総幅員が拡張されても、橋梁部で従来の総幅員により車両が円滑に通行できない問題がある。また、車両防護柵の設置に於いても新たな道路構造令に抵触する橋梁も多々見受けられる。 Road bridges designed and constructed under the old road structure ordinance point out the lack of width due to the increase in the size of passing vehicles, and it is also difficult to secure road shoulders for emergency vehicles and pedestrian sidewalks. There is an urgent need to expand the width in order to maintain safe and smooth traffic. In addition, even if the total width is expanded due to road maintenance and securing of the shoulder, there is a problem that the vehicle cannot smoothly pass by the conventional total width at the bridge portion. In addition, there are many bridges that conflict with the new road structure ordinance in the installation of vehicle protection fences.

従来、この種の第1の従来技術(図示せず)に於いては、道路橋の床版がコンクリート床版である場合、まず、コンクリート床版の張出し部を所定の位置で垂直に切断、除去し、コンクリート床版の本体側から露出した補強用鉄筋に既設のものより長い鉄筋を連結一体化した後、改めてコンクリートを打設して張出し部を延長する工法を施していた。そして、延長された張出し部の側端部分に改めて地覆部を設けるというものであった。 Conventionally, in the first prior art of this kind (not shown), when the road bridge floor slab is a concrete floor slab, first, the projecting portion of the concrete floor slab is cut vertically at a predetermined position. After removing and reinforce the reinforcing bars exposed from the main body side of the concrete slab, the reinforcing bars longer than the existing ones were connected and integrated, and then the concrete was cast again to extend the overhang. And the ground cover part was newly provided in the side edge part of the extended overhang | projection part.

また、第2の従来技術の例としては、図11に示すように、特開2004−176400号公開特許公報の図4等に開示された技術がある。すなわち、まず、主桁1から張出して片持ち桁2を取り付け、コンクリート床版3の主桁1の外側の張出し部を主桁1と地覆4の中間の適当な位置Pで垂直に切断し撤去する。次に、コンクリート床版3の端部の主鉄筋5を露出させ、撤去部分に軽量な鋼床版6を搬入し片持ち桁2に載置する。そして、コンクリート床版3と鋼床版6との連結部で主鉄筋5と延長主鉄筋7を連結し同部空間に充填材8を注入して一体化するというものである。9は連結用鋼板である。 Further, as an example of the second prior art, there is a technique disclosed in FIG. 4 of Japanese Patent Application Laid-Open No. 2004-176400, as shown in FIG. That is, first, a cantilever 2 is attached by overhanging from the main girder 1, and the overhanging portion outside the main girder 1 of the concrete floor slab 3 is cut vertically at an appropriate position P between the main girder 1 and the ground cover 4. Remove. Next, the main reinforcing bar 5 at the end of the concrete floor slab 3 is exposed, and a lightweight steel floor slab 6 is carried into the removed portion and placed on the cantilever beam 2. And the main reinforcement 5 and the extension main reinforcement 7 are connected in the connection part of the concrete floor slab 3 and the steel floor slab 6, and the filler 8 is inject | poured and integrated in the same part space. 9 is a steel plate for connection.

また、第3の従来技術の例としては、図12に示すように特開2001−49618号公開特許公報に開示された技術がある。すなわち、道路橋道路幅員拡張用地覆ユニットは、鋼製中空筒体4Aと腹板4Bとにより形成される。鋼製中空筒体4Aは、前面側1a、上面側1b、背面側1cを備えた鋼製の地覆部1Aの前面側1a、背面側1cの下端に底板部2Aを備えている。そして、該底板部2Aはこの地覆部1Aの背面側1cの外方に延伸部2aと底面側2bで一体化している。この例においては地覆部1Aと底板部2Aとを別に形成し、底板部2Aに地覆部1Aの前面側1aと背面側1cの内面に密接する側面板3a、3bを溶接して立ち上げ、側面板3a、3bを地覆部1Aの前面側1aと背面側1cの内面に合わせてボルト4a、4bを用いて締結して取り付けて一体化してある。そしてかかる第3の従来技術は鋼製中空筒体4Aを備えた道路用幅員拡張材が存在するが、2重鋼板で構成したものや、2重鋼板故に高力ボルト4a、4b等が前面に露出した構成であった。
特開2004−176400号公開特許公報 特開2001−49618号公開特許公報
As an example of the third prior art, there is a technique disclosed in Japanese Patent Laid-Open No. 2001-49618 as shown in FIG. That is, the road bridge road width expanding ground covering unit is formed by the steel hollow cylinder 4A and the abdomen 4B. The steel hollow cylinder 4A includes a bottom plate portion 2A at the lower end of the front side 1a and the back side 1c of a steel ground covering portion 1A provided with a front side 1a, an upper side 1b, and a back side 1c. The bottom plate portion 2A is integrated with the extending portion 2a and the bottom surface side 2b outside the back surface side 1c of the ground covering portion 1A. In this example, the ground cover portion 1A and the bottom plate portion 2A are separately formed, and the side plates 3a and 3b that are in close contact with the inner surfaces of the front surface side 1a and the back surface side 1c of the ground cover portion 1A are welded to the bottom plate portion 2A. The side plates 3a and 3b are fastened and attached using bolts 4a and 4b in accordance with the inner surfaces of the front side 1a and the back side 1c of the ground covering portion 1A and integrated. In the third prior art, there is a road width expansion material provided with a steel hollow cylinder 4A. However, a high-strength bolt 4a, 4b, etc. are formed on the front surface because of the double steel plate. It was an exposed configuration.
Japanese Patent Laid-Open No. 2004-176400 Japanese Patent Laid-Open No. 2001-49618

従来の技術は叙上した構成であるので、次の課題が存在する。
従来の技術に於ける道路橋の拡張方法やその構造は、特に第1の従来技術に於いてはコンクリートを付加して打設するものであるので、コンクリート床版3の重量の増加による主桁の強度不足や主桁上部の鉄筋量の不足、更にはコンクリート打設継ぎ部の耐久性不足など、コンクリート床版3の強度を維持するうえで種々の問題点があった。また、増設される部分がコンクリートにより形成されるので、コンクリートの養生や硬化に時間を要し、工事に伴う交通規制などが長期化するという問題点があった。
第2の従来技術に於いては、全て溶接構造であり耐力は高いが、重量が重くなり施工性に欠けるという問題点があり、衝突荷重が作用したとき、腹板部からの支圧力にコンクリート床版3が耐えられないという問題点があり、既存コンクリート床版3の端部を前面板の位置とした場合に、地覆4の耐力に限界があるという問題点があった。更に主桁の腹板にダメージを与える影響が大きいという問題点があった。
また、第3の従来技術に於いては、地覆部1Aと、底板部2Aの側面板3aがボルト4aにより一体化されている構造であるため耐力が低く、衝突荷重が作用したとき、腹板4Bからの支圧力にコンクリート床版が耐えられないという問題点があり、既存のコンクリート床版の端部を背面板1cより外方向の位置とした場合に、地覆部1Aの耐力が不足するという問題点があった。また鋼製中空筒体4Aが底板部2Aの上に補強リブ2cを設置する構造であり道路橋面の調整が難しく施工性に劣るという問題点があった。そして2重鋼板で構成した道路幅員拡張部材は、重量が重く、高力ボルト4a、4b等が外部に露出しているので、車両走行上危険が伴うと共に道路の美麗感に欠けるという問題点があった。
Since the conventional technology has the above-described configuration, the following problems exist.
In the prior art, the road bridge expansion method and its structure, in particular in the first prior art, is to cast concrete with additional concrete, so the main girder due to the increase in the weight of the concrete slab 3 There have been various problems in maintaining the strength of the concrete slab 3 such as insufficient strength of the steel plate, insufficient amount of reinforcing bars above the main girder, and insufficient durability of the concrete casting joint. In addition, since the part to be added is made of concrete, it takes time for curing and hardening of the concrete, and there is a problem that the traffic regulation associated with the construction is prolonged.
In the second prior art, all are welded structures and high proof stress, but there is a problem that the weight is heavy and the workability is lacking. There is a problem that the floor slab 3 cannot be tolerated, and there is a problem that the proof strength of the ground cover 4 is limited when the end portion of the existing concrete floor slab 3 is set to the position of the front plate. Furthermore, there was a problem that the influence of damaging the belly plate of the main girder was great.
Further, in the third prior art, since the ground cover portion 1A and the side plate 3a of the bottom plate portion 2A are integrated by the bolt 4a, the proof stress is low, and when the collision load is applied, There is a problem that the concrete floor slab cannot withstand the support pressure from the plate 4B, and when the end of the existing concrete floor slab is positioned outward from the back plate 1c, the proof strength of the ground cover 1A is insufficient. There was a problem of doing. Further, the steel hollow cylinder 4A has a structure in which the reinforcing rib 2c is installed on the bottom plate portion 2A, and there is a problem that it is difficult to adjust the road bridge surface and the workability is inferior. The road width extension member made of double steel plates is heavy and has high strength bolts 4a, 4b and the like exposed to the outside. there were.

また、上述した第1ないし第3の従来の技術に於ける道路橋の拡張方法や構造は、その施工方法では手順が複雑・雑多でありかつ幅員拡張に必要となる部材も重量が嵩むと共に部品数も多岐にわたっており、特に幅員の拡張幅が相対的に小さくて済む場合には、施工の難易度、工事期間及び工事コスト等の面で比較優位性に劣るという問題点があった。 Further, the road bridge expansion method and structure in the first to third conventional techniques described above are complicated and complicated in the construction method, and the members necessary for the width expansion are also heavy and the parts are increased. There are various numbers, and particularly when the expansion width of the width is relatively small, there is a problem that the comparative advantage is inferior in terms of construction difficulty, construction period and construction cost.

本発明は、コンクリート床版からなる道路橋の幅員を拡張するにあたり、道路橋用幅員拡張材が鋼製地覆を備えかつコンクリート床版と完全一体化構造物として構成した。つまり所定長を有する道路橋用幅員拡張材に於いて2種の道路橋用幅員拡張材、すなわち、略T字状支持部材を備えた支柱部材としての道路橋用幅員拡張材と地覆の内部に略T字状支持部材を備えることなく略輪環状補強リブを備えた中間部材としての道路橋用幅員拡張材とを目地(隙間)を介して交互に連続して配設した構成であって、該地覆前方の補強リブを排除すると共に地覆下面に腹板のフランジを備え、地覆部分とコンクリート床版の上面、側面及び下面の全体とをエポキシ樹脂で接着し、車両衝突事故等に際してコンクリート床版の破壊を防止し、必要な強度を維持しつつ重量を大幅に低減し、地覆部分の張出しや強度を更に増強し、施工性の向上を図り工事期間が短期間で済む技術を提供することを目的としたものであって、次の構成、手段から成立する。 In the present invention, when expanding the width of a road bridge made of a concrete slab, the width expansion material for a road bridge includes a steel ground cover and is configured as a completely integrated structure with the concrete slab. That is, in the width expansion material for road bridges having a predetermined length, the width expansion material for road bridges of two types, that is, the width expansion material for road bridges as a support member having a substantially T-shaped support member and the inside of the ground cover The road bridge width expanding material as an intermediate member provided with a substantially ring-shaped reinforcing rib without being provided with a substantially T-shaped support member is arranged alternately and continuously via joints (gap). In addition, the reinforcing ribs in front of the ground cover are eliminated and a flange of a belly plate is provided on the bottom surface of the ground cover, and the ground cover portion and the entire top surface, side surface and bottom surface of the concrete floor slab are bonded with an epoxy resin, and a vehicle collision accident Technology that prevents the destruction of concrete slabs, significantly reduces the weight while maintaining the required strength, further increases the overhang and strength of the ground cover, and improves the workability to shorten the construction period. Is intended to provide Configuration of, established from the means.

請求項1記載の発明によれば、道路橋に於ける幅員拡張材の設置方法であって、コンクリート床版とコンクリート製の地覆で構成された道路橋に於いて、単一の鋼板で形成された前面部、背面部及び底面部の各接合部を溶着すると共に該前面部と上面部との継目の下面に支持板で該上面部をボルトで締結した略箱状体でなる鋼製中空筒体と、該鋼製中空筒体の内部に固定した略輪環状補強リブと、該鋼製中空筒体の前面方向に突設された延伸部と一体形成された底面部の略中央に長さ方向に一連に垂下固定した略矩形の腹板と、該腹板に対して直角方向に周囲が略不等辺四角形かつ所定の等間隔に列設した該腹板の補強リブと、前記腹板の下端から前記延伸部に略平行にかつ該鋼製中空筒体の前面方向に固定・配設したフランジ延伸部と、前記腹板の背面に備えたフランジとで構成した中間部材としての道路橋用幅員拡張材及び単一の鋼板で形成された前面部、背面部及び底面部の各接合部を溶着すると共に該前面部と上面部との継目の下面に支持板で該上面部をボルトで締結した略箱状体でなる鋼製中空筒体と、該鋼製中空筒体の内部に固定した略T字状支持部材と、前記底面部であって略T字状支持部材の左・右部位に穿孔した作業用穴と、前記上面部に複数個を形成した車両防護柵取付孔と、該鋼製中空筒体の前面方向に突設された延伸部と一体形成された底面部の略中央に長さ方向に一連に垂下固定した略矩形の腹板と、該腹板に対して直角方向に周囲が略不等辺四角形かつ所定の等間隔に列設した該腹板の補強リブと、前記腹板の下端から前記延伸部に略平行にかつ該鋼製中空筒体の前面方向に固定・配設したフランジ延伸部と、前記腹板の背面に備えたフランジとで構成した支柱部材としての道路橋用幅員拡張材を施工現場に複数個搬入し、第1に道路橋の全長に亘り前記延伸部を設置するために必要な幅寸法の舗装をコンクリート床版から除去しかつ露出したコンクリート床版の上面と同一面に於いて既存のコンクリート製の地覆を切断及び/またはハツリ除去すると共に前記道路橋用幅員拡張材の寸法に基づいてコンクリート床版の上面及び側面にボルト孔の位置を罫書きし、コンクリート床版の罫書き位置に於いてボルト孔を穿孔し、第2に前記コンクリート床版下地処理用モルタル層を介在させて、前記道路橋用幅員拡張材をコンクリート床版に仮置きし、前記上面部は全て取外し、ボルト・ナットにより前記道路橋用幅員拡張材をコンクリート床版に締め付け固定し、第3にコンクリート床版及び下地処理用モルタル層が接する前記中間部材としての道路橋用幅員拡張材と前記支柱部材としての道路橋用幅員拡張材との端面及び前記中間部材としての道路橋用幅員拡張材と前記支柱部材としての道路橋用幅員拡張材との隣接部位に形成された目地をシール材でシール処理を行い、コンクリート床版と前記延伸部の下面、前記腹板の前面及び前記フランジ延伸部の上面の間で形成させる隙間に樹脂を注入・充填し、前記上面部を道路橋用幅員拡張材に固定し、第4に該上面部と前記前面部の継目、該上面部と前記背面部の突合せ部及び前記目地を前記シール材でシール処理し、道路橋用幅員拡張材の前記車両防護柵取付孔に車両防護柵を固定すると共に前記延伸部の上面にコンクリートをないし樹脂モルタル舗装を打設してその上面を既存の舗装と面一に仕上げることを特徴とする。 According to invention of Claim 1, it is the installation method of the width expansion material in a road bridge, Comprising: In the road bridge comprised by the concrete floor slab and the concrete ground cover, it forms with a single steel plate. A steel hollow made of a substantially box-like body in which the joined portions of the front portion, the rear portion, and the bottom portion are welded and the upper surface portion is fastened with bolts to the lower surface of the joint between the front portion and the upper surface portion with a support plate A tube, a substantially annular reinforcing rib fixed inside the hollow steel tube, and an elongated portion projecting in the front direction of the hollow steel tube are formed at a substantially central portion of the bottom surface. A substantially rectangular belly plate that is suspended and fixed in series in the vertical direction; a reinforcing rib of the belly plate that is arranged in a substantially right-angled direction at a right angle to the belly plate and arranged at predetermined equal intervals; and the belly plate A flange extension portion fixed and arranged in a front direction of the steel hollow cylinder substantially parallel to the extension portion from the lower end of the steel, and the front Welding each joint of the front part, back part and bottom part formed of a width extension material for road bridges and a single steel plate as an intermediate member composed of a flange provided on the back of the abdomen and the front part A steel hollow cylinder made of a substantially box-like body having a top plate fastened with a support plate to the lower surface of the seam between the upper surface and the upper surface, and a substantially T-shaped support member fixed to the inside of the steel hollow cylinder A work hole perforated in the left and right portions of the bottom portion of the substantially T-shaped support member, a plurality of vehicle protection fence mounting holes formed on the top surface portion, and the steel hollow cylinder A substantially rectangular bell plate fixed in series in the length direction at the approximate center of the bottom portion integrally formed with the extending portion projecting in the front direction, and the periphery in a direction perpendicular to the belly plate is substantially unequal Reinforcing ribs of the belly plate arranged in a square shape at predetermined equal intervals, and the steel substantially parallel to the extending portion from the lower end of the belly plate A plurality of road bridge width extension materials as strut members composed of a flange extending portion fixed and arranged in the front direction of the hollow cylinder and a flange provided on the back surface of the abdomen are loaded into the construction site, 1. Pavement of width necessary for installing the extension part over the entire length of the road bridge is removed from the concrete floor slab, and the existing concrete ground cover on the same surface as the exposed concrete floor slab cutting and / or chipping scribed sake of positions of the bolt holes on the upper and side surfaces of the concrete slab on the basis with the size of the road bridge for width extension member is removed, the bolt holes at the scoring position of the concrete slab puncturing the, to the concrete slab in the second with intervening primed mortar layer, the road bridge for width expansion material temporarily placed in the concrete slab, the upper surface portion removably all bolts and nuts The width expansion material for road bridges is fastened and fixed to the concrete floor slab, and third, the width expansion material for road bridges as the intermediate member in contact with the concrete floor slab and the mortar layer for ground treatment and the road bridge as the support members Sealing is performed with a sealing material on the joint surface formed between the end face of the width expanding material for road use and the adjacent portion of the width expanding material for road bridge as the intermediate member and the width expanding material for road bridge as the support member. Resin is injected and filled in the gap formed between the floor slab and the lower surface of the extending portion, the front surface of the abdomen and the upper surface of the flange extending portion, and the upper surface portion is fixed to a road bridge width expanding material, 4. The seam between the upper surface portion and the front surface portion, the abutting portion between the upper surface portion and the rear surface portion, and the joint are sealed with the seal material, and the vehicle protection fence mounting hole of the road bridge width expansion material is protected with the vehicle. Fix the fence The concrete on the upper surface of the extended portion or the resin mortar paving and Da設, characterized in that finish the upper surface to an existing pavement flush while.

本発明に係る道路橋用幅員拡張材の設置方法は叙上した構成、作用を有するので、次の効果がある。 Since the installation method of the width extension material for road bridges according to the present invention has the above-described configuration and operation, the following effects are obtained.

請求項1記載の発明によれば、道路橋に於ける幅員拡張材の設置方法であって、コンクリート床版とコンクリート製の地覆で構成された道路橋に於いて、単一の鋼板で形成された前面部、背面部及び底面部の各接合部を溶着すると共に該前面部と上面部との継目の下面に支持板で該上面部をボルトで締結した略箱状体でなる鋼製中空筒体と、該鋼製中空筒体の内部に固定した略輪環状補強リブと、該鋼製中空筒体の前面方向に突設された延伸部と一体形成された底面部の略中央に長さ方向に一連に垂下固定した略矩形の腹板と、該腹板に対して直角方向に周囲が略不等辺四角形かつ所定の等間隔に列設した該腹板の補強リブと、前記腹板の下端から前記延伸部に略平行にかつ該鋼製中空筒体の前面方向に固定・配設したフランジ延伸部と、前記腹板の背面に備えたフランジとで構成した中間部材としての道路橋用幅員拡張材及び単一の鋼板で形成された前面部、背面部及び底面部の各接合部を溶着すると共に該前面部と上面部との継目の下面に支持板で該上面部をボルトで締結した略箱状体でなる鋼製中空筒体と、該鋼製中空筒体の内部に固定した略T字状支持部材と、前記底面部であって略T字状支持部材の左・右部位に穿孔した作業用穴と、前記上面部に複数個を形成した車両防護柵取付孔と、該鋼製中空筒体の前面方向に突設された延伸部と一体形成された底面部の略中央に長さ方向に一連に垂下固定した略矩形の腹板と、該腹板に対して直角方向に周囲が略不等辺四角形かつ所定の等間隔に列設した該腹板の補強リブと、前記腹板の下端から前記延伸部に略平行にかつ該鋼製中空筒体の前面方向に固定・配設したフランジ延伸部と、前記腹板の背面に備えたフランジとで構成した支柱部材としての道路橋用幅員拡張材を施工現場に複数個搬入し、第1に道路橋の全長に亘り前記延伸部を設置するために必要な幅寸法の舗装をコンクリート床版から除去しかつ露出したコンクリート床版の上面と同一面に於いて既存のコンクリート製の地覆を切断及び/またはハツリ除去すると共に前記道路橋用幅員拡張材の寸法に基づいてコンクリート床版の上面及び側面にボルト孔の位置を罫書きし、コンクリート床版の罫書き位置に於いてボルト孔を穿孔し、第2に前記コンクリート床版下地処理用モルタル層を介在させて、前記道路橋用幅員拡張材をコンクリート床版に仮置きし、前記上面部は全て取外し、ボルト・ナットにより前記道路橋用幅員拡張材をコンクリート床版に締め付け固定し、第3にコンクリート床版及び下地処理用モルタル層が接する前記中間部材としての道路橋用幅員拡張材と前記支柱部材としての道路橋用幅員拡張材との端面及び前記中間部材としての道路橋用幅員拡張材と前記支柱部材としての道路橋用幅員拡張材との隣接部位に形成された目地をシール材でシール処理を行い、コンクリート床版と前記延伸部の下面、前記腹板の前面及び前記フランジ延伸部の上面の間で形成させる隙間に樹脂を注入・充填し、前記上面部を道路橋用幅員拡張材に固定し、第4に該上面部と前記前面部の継目、該上面部と前記背面部の突合せ部及び前記目地を前記シール材でシール処理し、道路橋用幅員拡張材の前記車両防護柵取付孔に車両防護柵を固定すると共に前記延伸部の上面にコンクリートをないし樹脂モルタル舗装を打設してその上面を既存の舗装と面一に仕上げることを特徴とする道路橋用幅員拡張材の設置方法を提供する。
このような構成としたので、前記中間部材としての道路橋用幅員拡張材は車両等の衝撃荷重に耐えうる構造にして軽量化を図り、前記支柱部材としての道路橋用幅員拡張材は車両防護柵等が車両等による衝突荷重に耐えうる強固な構造として道路橋用幅員拡張材のユニット化を図ったので道路橋全体に於ける道路橋用幅員拡張材の総重量を軽量化できるという効果があり、前記道路橋用幅員拡張材の各々の長さを比較的短く例えば1(m)とすることにより、既設のコンクリート床版の水平レベルすなわち傾斜に沿って前記道路橋用幅員拡張材を設置できるので、その結果前記コンクリート床版と前記道路橋用幅員拡張材の設置面に於ける隙間を少なくすることができ、隙間に充填する材料例えばエポキシ樹脂の量を少なくすることができるので、施工性が向上すると共に十分な施工強度を得られるという効果がある。また、前記コンクリート床版と前記道路橋用幅員拡張材の延伸部の下面、腹板の前面及びフランジ延伸部の上面の間で形成させる隙間にエポキシ樹脂を注入・充填して接着する設置方法であるから、当該前記道路橋用幅員拡張材に車両等による衝突荷重が作用したとき、当該前記道路橋用幅員拡張材からコンクリート床版への衝撃荷重が接着面全体に分散して作用するので、ボルト等の締結部材の締結部位の周辺に荷重が集中することを防止でき、前記締結部位でのコンクリート床版の破壊・破断を有効に防止できるという効果がある。更に、フランジ延伸部を設けて、従来技術に於いて延伸部上に必要とされた補強リブを廃止したので、当該道路橋用幅員拡張材をコンクリート床版に設置した後に復旧工事として行う延伸部に於けるコンクリートないし樹脂モルタル舗装の厚みを自由に調整することができて既存の例えばアスファルト舗装と面一若しくは低く仕上げることができるので、雨水等を路肩において効率よく流過させる路肩形状を容易に舗装・施工することができるという効果がある。
According to invention of Claim 1, it is the installation method of the width expansion material in a road bridge, Comprising: In the road bridge comprised by the concrete floor slab and the concrete ground cover, it forms with a single steel plate. A steel hollow made of a substantially box-like body in which the joined portions of the front portion, the rear portion, and the bottom portion are welded and the upper surface portion is fastened with bolts to the lower surface of the joint between the front portion and the upper surface portion with a support plate A tube, a substantially annular reinforcing rib fixed inside the hollow steel tube, and an elongated portion projecting in the front direction of the hollow steel tube are formed at a substantially central portion of the bottom surface. A substantially rectangular belly plate that is suspended and fixed in series in the vertical direction; a reinforcing rib of the belly plate that is arranged in a substantially right-angled direction at a right angle to the belly plate and arranged at predetermined equal intervals; and the belly plate A flange extension portion fixed and arranged in a front direction of the steel hollow cylinder substantially parallel to the extension portion from the lower end of the steel, and the front Welding each joint of the front part, back part and bottom part formed of a width extension material for road bridges and a single steel plate as an intermediate member composed of a flange provided on the back of the abdomen and the front part A steel hollow cylinder made of a substantially box-like body having a top plate fastened with a support plate to the lower surface of the seam between the upper surface and the upper surface, and a substantially T-shaped support member fixed to the inside of the steel hollow cylinder A work hole perforated in the left and right portions of the bottom portion of the substantially T-shaped support member, a plurality of vehicle protection fence mounting holes formed on the top surface portion, and the steel hollow cylinder A substantially rectangular bell plate fixed in series in the length direction at the approximate center of the bottom portion integrally formed with the extending portion projecting in the front direction, and the periphery in a direction perpendicular to the belly plate is substantially unequal Reinforcing ribs of the belly plate arranged in a square shape at predetermined equal intervals, and the steel substantially parallel to the extending portion from the lower end of the belly plate A plurality of road bridge width extension materials as strut members composed of a flange extending portion fixed and arranged in the front direction of the hollow cylinder and a flange provided on the back surface of the abdomen are loaded into the construction site, 1. Pavement of width necessary for installing the extension part over the entire length of the road bridge is removed from the concrete floor slab, and the existing concrete ground cover on the same surface as the exposed concrete floor slab cutting and / or chipping scribed sake of positions of the bolt holes on the upper and side surfaces of the concrete slab on the basis with the size of the road bridge for width extension member is removed, the bolt holes at the scoring position of the concrete slab puncturing the, to the concrete slab in the second with intervening primed mortar layer, the road bridge for width expansion material temporarily placed in the concrete slab, the upper surface portion removably all bolts and nuts The width expansion material for road bridges is fastened and fixed to the concrete floor slab, and third, the width expansion material for road bridges as the intermediate member in contact with the concrete floor slab and the mortar layer for ground treatment and the road bridge as the support members Sealing is performed with a sealing material on the joint surface formed between the end face of the width expanding material for road use and the adjacent portion of the width expanding material for road bridge as the intermediate member and the width expanding material for road bridge as the support member. Resin is injected and filled in the gap formed between the floor slab and the lower surface of the extending portion, the front surface of the abdomen and the upper surface of the flange extending portion, and the upper surface portion is fixed to a road bridge width expanding material, 4. The seam between the upper surface portion and the front surface portion, the abutting portion between the upper surface portion and the rear surface portion, and the joint are sealed with the seal material, and the vehicle protection fence mounting hole of the road bridge width expansion material is protected with the vehicle. Fix the fence The concrete on the upper surface of the extended portion or the resin mortar paving and Da設 provides an installation method of a road bridge for width expansion material, characterized in that finish the upper surface to an existing pavement flush while.
With such a configuration, the road bridge width expanding material as the intermediate member can withstand a shock load of a vehicle or the like to reduce the weight, and the road bridge width expanding material as the support member is used for vehicle protection. Since the fences and other components have a solid structure that can withstand a collision load from a vehicle, etc., the width expansion material for road bridges has been unitized, so the total weight of the width expansion materials for road bridges in the entire road bridge can be reduced. Yes, by setting the length of each of the road bridge width extension materials to be relatively short, for example, 1 (m), the width extension material for the road bridge is installed along the horizontal level, that is, the inclination of the existing concrete floor slab. As a result, the gap between the concrete floor slab and the road bridge width expanding material can be reduced, and the amount of material, for example, epoxy resin filling the gap can be reduced. In an effect that is obtained sufficient construction strength with workability is improved. Also, an installation method in which an epoxy resin is injected and filled into a gap formed between the lower surface of the extending portion of the concrete floor slab and the width extension material for the road bridge, the front surface of the abdomen, and the upper surface of the flange extending portion. Therefore, when a collision load due to a vehicle or the like acts on the width expansion material for the road bridge, since the impact load from the width expansion material for the road bridge to the concrete floor slab acts on the entire bonding surface, It is possible to prevent the load from being concentrated around the fastening part of the fastening member such as a bolt, and to effectively prevent the destruction and fracture of the concrete slab at the fastening part. Furthermore, since the flange extension part was provided and the reinforcing ribs required on the extension part in the prior art were abolished, the extension part to be carried out as restoration work after installing the road bridge width extension material on the concrete slab The thickness of concrete or resin mortar pavement can be adjusted freely, and it can be finished with the same or low level as existing asphalt pavement, etc. There is an effect that it can be paved and constructed.

本発明に係る道路橋用幅員拡張材であって、所定長を有する2種の道路橋用幅員拡張材を目地(隙間)を介して一連に設置した状態を示す実施の形態を示す正面図である。It is the width expansion material for road bridges concerning this invention, Comprising: It is a front view which shows embodiment which shows the state which installed two types of width expansion materials for road bridges which have predetermined length through a joint (gap) is there. 図1の底面図であるIt is a bottom view of FIG. 図1の矢視A−A線方向から見た本発明に係る道路橋用幅員拡張材の設置方法の実施の形態の一例を示すものであって、地覆すなわち鋼製中空筒体の内部に略輪環状補強リブを備えた中間部材としての道路橋用幅員拡張材を示す垂直拡大断面図である。It shows an example of embodiment of the installation method of the width expansion material for road bridges concerning this invention seen from the arrow AA line direction of FIG. 1, Comprising: It is the inside of a ground cover, ie, a steel hollow cylinder. It is a vertical expanded sectional view which shows the width expansion material for road bridges as an intermediate member provided with the substantially ring annular reinforcement rib. 図3に示す中間部材としての道路橋用幅員拡張材を上方から見た斜視図である。It is the perspective view which looked at the width expansion material for road bridges as an intermediate member shown in FIG. 3 from upper direction. 図3に示す中間部材としての道路橋用幅員拡張材を下方から見た斜視図である。It is the perspective view which looked at the width expansion material for road bridges as an intermediate member shown in FIG. 3 from the downward direction. 図3に示す中間部材としての道路橋用幅員拡張材に於ける地覆の内部に備えた略輪環状補強リブの構成を明示する斜視図である。FIG. 4 is a perspective view clearly showing the configuration of a substantially ring-shaped reinforcing rib provided inside the ground cover in the road bridge width expanding material as the intermediate member shown in FIG. 3. 図1の矢視B−B線方向から見た本発明に係る道路橋用幅員拡張材の設置方法の実施の形態の一例を示すものであって、地覆すなわち鋼製中空筒体の内部に略T字状支持部材を備えた道路橋用幅員拡張材の支柱部材としての道路橋用幅員拡張材を示す垂直拡大断面図である。FIG. 1 shows an example of an embodiment of a method for installing a width extension material for a road bridge according to the present invention as seen from the direction of the arrow B-B in FIG. It is a vertical expanded sectional view which shows the width expansion material for road bridges as a strut member of the width expansion material for road bridges provided with the substantially T-shaped support member. 図7に示す支柱部材としての道路橋用幅員拡張材を上方から見た斜視図である。It is the perspective view which looked at the width extension material for road bridges as a support | pillar member shown in FIG. 7 from upper direction. 図7に示す支柱部材としての道路橋用幅員拡張材に於いて下方から見た斜視図である。It is the perspective view seen from the lower part in the width expansion material for road bridges as a support | pillar member shown in FIG. 図7に示す支柱部材としての道路橋用幅員拡張材に於ける地覆の内部に備えた略T字状支持部材の構成を明示する斜視図である。FIG. 8 is a perspective view clearly showing the configuration of a substantially T-shaped support member provided inside the ground cover in the road bridge width expanding material as the support member shown in FIG. 7. 従来の技術に於ける道路橋の拡幅方法の施工後の一例を示す断面図である。It is sectional drawing which shows an example after construction of the widening method of the road bridge in a prior art. 従来の技術に於ける道路橋の拡幅方法の施工後の他の例を示す断面図である。It is sectional drawing which shows the other example after construction of the widening method of the road bridge in a prior art.

以下、本発明に係る道路橋用幅員拡張材の設置方法についての実施の形態を、添付図面に基づき詳細に説明する。
図1は本発明に係る道路橋用幅員拡張材であって、所定長を有する2種の道路橋用幅員拡張材を目地(隙間)を介して一連に設置した状態を示す実施の形態を示す正面図である。図2は図1の底面図である。図3は図1の矢視A−A線方向から見た本発明に係る道路橋用幅員拡張材の設置方法の実施の形態の一例を示すものであって、地覆の内部に略輪環状補強リブを備えた道路橋用幅員拡張材を示す垂直拡大断面図である。図4は図3に示す道路橋用幅員拡張材を上方から見た斜視図である。図5は図3に示す道路橋用幅員拡張材を下方から見た斜視図である。図6は図3に示す道路橋用幅員拡張材に於ける地覆の内部に備えた略輪環状補強リブの構成を明示する斜視図である。
以下、図1ないし図6に基づき、先ず本発明に係る道路橋用幅員拡張材の構成について説明する。
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a method for installing a road bridge width expanding material according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an embodiment of a road bridge width expanding material according to the present invention, in which two kinds of road bridge width expanding materials having a predetermined length are installed in series via joints (gap). It is a front view. FIG. 2 is a bottom view of FIG. FIG. 3 shows an example of an embodiment of a method for installing a width extension material for a road bridge according to the present invention as seen from the direction of the arrow AA in FIG. It is a vertical expanded sectional view which shows the width expansion material for road bridges provided with the reinforcement rib. FIG. 4 is a perspective view of the road bridge width expanding material shown in FIG. 3 as viewed from above. FIG. 5 is a perspective view of the road bridge width expanding material shown in FIG. 3 as viewed from below. FIG. 6 is a perspective view clearly showing the configuration of a substantially annular annular reinforcing rib provided inside the ground cover in the road bridge width expanding material shown in FIG. 3.
Hereinafter, based on FIG. 1 thru | or FIG. 6, the structure of the width extension material for road bridges which concerns on this invention is demonstrated first.

図1は2種の道路橋用幅員拡張材つまり道路橋用幅員拡張材の中間部材としての道路橋用幅員拡張材と、道路橋用幅員拡張材の支柱部材としての道路橋用幅員拡張材とを例えば幅長5(mm)程度の目地(隙間)10Cを介して交互に一連に配設した構成例を示している。10Aは道路橋用幅員拡張材の中間部材としての道路橋用幅員拡張材であり、地覆11Aの内部に略T字状支持部材を備えることなく、略輪環状補強リブ11eを配備している。10Bは道路橋用幅員拡張材の支柱部材としての道路橋用幅員拡張材であり地覆11Bの内部に略T字状支持部材24を配備している。 FIG. 1 shows a width expansion material for a road bridge as an intermediate member of two types of width expansion materials for a road bridge, that is, a width expansion material for a road bridge as a strut member of the width expansion material for a road bridge. For example, a configuration example is shown in which a series of the gaps are alternately arranged via joints (gap) 10C having a width of about 5 (mm). 10A is a road bridge width expanding material as an intermediate member of the road bridge width expanding material, and is provided with a substantially ring-shaped reinforcing rib 11e without providing a substantially T-shaped support member inside the ground cover 11A. . Reference numeral 10B denotes a road bridge width expanding material as a support member of the road bridge width expanding material, and a substantially T-shaped support member 24 is provided inside the ground cover 11B.

先ず、道路橋用幅員拡張材の中間部材としての道路橋用幅員拡張材10Aについて説明する。図3に於いて10Aは道路橋用幅員拡張材の中間部材としての道路橋用幅員拡張材の設置状態であって、工場で道路橋用幅員拡張材10Aを製作し、現場の条件及び施工性等を考慮して所望のサイズのユニットとして形成されている。11Aは道路橋用幅員拡張材10Aのうち略箱状体でなる鋼製中空筒体すなわち地覆を指示しており、前面部11a、上面部11b、背面部11c及び底面部11dの各面部から構成されている。これら各面部11a、11b、11c及び11dは単一の鋼板でなっており、各面部の接合部は溶着されている。図3に示すように前面部11aの上端は背面方向に滑らかに屈曲して施工後の供用に配慮してある。 First, the road bridge width expanding material 10A as an intermediate member of the road bridge width expanding material will be described. In FIG. 3, 10A is the installation state of the width expansion material for road bridges as an intermediate member of the width expansion material for road bridges. It is formed as a unit of a desired size in consideration of the above. 11A designates a steel hollow cylinder having a substantially box-like body, ie, a ground cover, of the road bridge width expanding material 10A. From each surface portion of the front surface portion 11a, the upper surface portion 11b, the back surface portion 11c, and the bottom surface portion 11d. It is configured. Each of these surface portions 11a, 11b, 11c, and 11d is a single steel plate, and the joint portion of each surface portion is welded. As shown in FIG. 3, the upper end of the front surface portion 11a is bent smoothly in the back surface direction so that it can be used after construction.

12は鋼製中空筒体つまり地覆11Aの前面方向に突設された延伸部であって、底面部11dと一体成形されている。延伸部12と底面部11dでなる一体成形部材つまり底板部の略中央には、図3に示すように鋼製中空筒体つまり地覆11Aの長さ方向に一連に垂下固定した略矩形の腹板13が設けられており、該腹板13に対して直角方向には図1及び図3に示すように周囲が略不等辺四角形又は台形状からなる腹板13の補強リブ14が所定の等間隔にて、例えば図1に示すように複数個又は多数個を列設している。該腹板13の補強リブ14、14の相互間で囲われた腹板13には、図1で示すようにその略中央に略長円形のボルト穴13aが1個又は2個並設されている。ここでは、各面ごとに1個又は2個のボルト穴13a、13aを連設しているが、現場の条件により配設数は調整すればよい。 Reference numeral 12 denotes a steel hollow cylindrical body, that is, an extending portion that protrudes in the front direction of the ground cover 11A, and is integrally formed with the bottom surface portion 11d. As shown in FIG. 3, a substantially rectangular bellows that is continuously suspended and fixed in the length direction of the steel hollow cylinder, that is, the ground cover 11A, is provided at the approximate center of the integrally formed member consisting of the extending portion 12 and the bottom surface portion 11d. As shown in FIGS. 1 and 3, the reinforcing ribs 14 of the abdominal plate 13 whose periphery is a substantially unequal square or trapezoidal shape are arranged in a direction perpendicular to the abdominal plate 13 in a predetermined manner. At intervals, for example, as shown in FIG. As shown in FIG. 1, the belly plate 13 surrounded by the reinforcing ribs 14 and 14 of the belly plate 13 has one or two substantially oval bolt holes 13a arranged substantially in the center. Yes. Here, one or two bolt holes 13a, 13a are connected to each surface, but the number of arrangements may be adjusted according to the conditions at the site.

前記地覆11Aの内部には、例えば略輪環状補強リブ11eを固定しており、その横方向側面形状が図3及び図6に示すように略口の字であって図示するように輪環状の4辺で構成している。略輪環状補強リブ11eの4辺のうち上部が前記上面部11bの内壁に密接するように構成している。略輪環状補強リブ11eは平面板状に形成され、例えば図6に示すように所定の等間隔にて垂直方向に底面部11dの上面に立設している。該略輪環状補強リブ11eの上部は例えば平板部(図示せず)を延出形成し該地覆11Aの上面部11bを載置しやすいように構成にしている。該略輪環状補強リブ11eは、例えば前記腹板13の補強リブ14の取付位置と底面部11dを挟んで同一面に取付られており、設置数を同一とする。そして当該本発明に係る道路橋用幅員拡張材の中間部材としての道路橋用幅員拡張材10Aの特徴は地覆11Aの延伸部12の上面に補強リブを備えていない。 For example, a substantially ring-shaped reinforcing rib 11e is fixed inside the ground cover 11A, and its lateral side shape is substantially a square shape as shown in FIGS. It consists of four sides. The upper part of the four sides of the substantially annular annular reinforcing rib 11e is configured to be in close contact with the inner wall of the upper surface part 11b. The substantially annular annular reinforcing rib 11e is formed in a flat plate shape, and is erected on the upper surface of the bottom surface portion 11d in the vertical direction at predetermined equal intervals, for example, as shown in FIG. For example, a flat plate portion (not shown) is extended from the upper portion of the substantially annular annular reinforcing rib 11e so that the upper surface portion 11b of the ground cover 11A can be easily placed. The substantially ring-shaped reinforcing ribs 11e are mounted on the same surface, for example, with the mounting positions of the reinforcing ribs 14 of the abdominal plate 13 across the bottom surface portion 11d, and the number of installations is the same. A feature of the road bridge width expanding material 10A as an intermediate member of the road bridge width expanding material according to the present invention is that no reinforcing rib is provided on the upper surface of the extending portion 12 of the ground cover 11A.

前記腹板13の下端には前記地覆11Aの延伸部12と略平行に所定長のフランジ延伸部15を地覆11Aの前面方向に固定・配設している。そして、前記延伸部12、腹板13及びフランジ延伸部15は全体としての側面形状が略コ字状に形成してあり、この略コ字状の部分にエポキシ樹脂層21及び下地処理用モルタル層22を介在させて延伸部12の下面に配置されるコンクリート床板18を保持・固定する。前記延伸部12、腹板13及びフランジ延伸部15はそれぞれが各別部材として溶着手段により固定・配置するが、一つの部材で一体構成することも可能である。 At the lower end of the belly plate 13, a flange extending portion 15 having a predetermined length is fixed and arranged in the front direction of the ground covering 11A substantially parallel to the extending portion 12 of the ground covering 11A. The stretched portion 12, the stomach plate 13 and the flange stretched portion 15 are formed in a substantially U-shaped side surface as a whole, and an epoxy resin layer 21 and a ground treatment mortar layer are formed on the approximately U-shaped portion. The concrete floor board 18 arrange | positioned on the lower surface of the extending | stretching part 12 through 22 is hold | maintained and fixed. The extending portion 12, the abdominal plate 13, and the flange extending portion 15 are each fixed and arranged as a separate member by welding means, but may be integrally configured by one member.

底面部11dには略輪環状補強リブ11e、11eを立設した上面を除き、相互の補強リブ14、14間の略中央に図2、図3で示す略楕円形又は矩形の例えば100(mm)×150(mm)の作業用穴11fが設けられており、上面部11bと略輪環状補強リブ11eとの締結に使用するボルト、ナット等締結部材の挿入作業やその溶接作業を行う。また、延伸部12には略円形又は楕円形のボルト穴12a、12bが設けられている。そしてこのボルト穴12a、12bを介してコンクリートアンカー16、アンカーボルト17をコンクリート床版18に打込む。
尚、前記作業用穴11fは省略してもよい。
Except for the upper surface where the ring-shaped reinforcing ribs 11e and 11e are erected on the bottom surface portion 11d, the substantially elliptical or rectangular shape shown in FIG. ) × 150 (mm) work holes 11f are provided, and work for inserting and welding fastening members such as bolts and nuts used for fastening the upper surface portion 11b to the substantially annular annular reinforcing rib 11e is performed. The extending portion 12 is provided with substantially circular or elliptical bolt holes 12a and 12b. Then, the concrete anchor 16 and the anchor bolt 17 are driven into the concrete floor slab 18 through the bolt holes 12a and 12b.
The working hole 11f may be omitted.

前記延伸部12の上面にはコンクリートないし樹脂モルタル舗装19を敷設する。このコンクリートないし樹脂モルタル舗装19の前方つまり図3の右方向に隣接して前記コンクリート床版18の上面に例えばアスファルト舗装20を敷設する。また前述したように前記延伸部12の下面、腹板13の前面及びフランジ延伸部15の上面に例えば厚さ5(mm)程度のエポキシ樹脂層21を注入する。このエポキシ樹脂層21の下面及び前記腹板13の前面や前記フランジ延伸部15の上面には下地処理用モルタル層22を介在してある。このように構成したので中間部材としての道路橋用幅員拡張材10Aをコンクリート床板18に確実に固定しかつ、衝撃に強い構造を実現すると共に雨水等の流入を完全に防止し気密性の高い道路橋用幅員拡張材10Aを提供できる。 Concrete or resin mortar pavement 19 is laid on the upper surface of the extending portion 12. For example, asphalt pavement 20 is laid on the upper surface of the concrete floor slab 18 in front of the concrete or resin mortar pavement 19, that is, adjacent to the right direction in FIG. Further, as described above, an epoxy resin layer 21 having a thickness of, for example, about 5 (mm) is injected into the lower surface of the extending portion 12, the front surface of the abdominal plate 13, and the upper surface of the flange extending portion 15. A grounding mortar layer 22 is interposed on the lower surface of the epoxy resin layer 21, the front surface of the stomach plate 13, and the upper surface of the flange extending portion 15. With this construction, the road bridge width expanding member 10A as an intermediate member is securely fixed to the concrete floor board 18, and a structure that is resistant to impacts is realized, and inflow of rainwater and the like is completely prevented, and the road is highly airtight. The bridge width expanding material 10A can be provided.

前記腹板13を基点としてつまり、腹板13の背面に前記フランジ延伸部15の反対方向すなわち後方には所定幅を有する板状の腹板のフランジ23を備えている。この腹板のフランジ23は図5に示すように地覆11Aの背面部11cの下端と、前記腹板13の下端との間に溶接手段等によりその端部を固定され、地覆11Aの長さ方向に相互間隔を有し、複数個、例えば3個を配備している。すなわち腹板13と地覆11Aの背面部11c間に介設されている。そして該腹板のフランジ23は図5に示すように前記底面部11dの下面に設置した各補強リブ14の下端にそれぞれ固定する。従って、該腹板のフランジ23の設置数は補強リブ14と同一数となり両者の全体側面形状は略T字状となる。このように構成したので、道路橋用幅員拡張材の中間部材としての道路橋用幅員拡張材10Aの耐荷性を向上させ道路上に地震や輪荷重等衝撃が加わったときにも毀損することがなくまた再補修の必要がなく道路の安全性に寄与する。 With the abdominal plate 13 as a base point, a plate-like abdominal plate flange 23 having a predetermined width is provided on the back surface of the abdominal plate 13 in the opposite direction of the flange extending portion 15, that is, in the rear. As shown in FIG. 5, the flange 23 of the abdomen is fixed at its end by welding means between the lower end of the back surface 11c of the cover 11A and the lower end of the abdomen 13, so that the length of the cover 11A is long. A plurality of, for example, three are provided in the vertical direction. That is, it is interposed between the abdominal plate 13 and the back surface portion 11c of the ground cover 11A. As shown in FIG. 5, the flange 23 of the abdominal plate is fixed to the lower end of each reinforcing rib 14 installed on the lower surface of the bottom surface portion 11d. Accordingly, the number of the flanges 23 of the abdominal plate installed is the same as the number of the reinforcing ribs 14, and the overall side surface shape of both is substantially T-shaped. Since it comprised in this way, the load resistance of 10 A of width expansion materials for road bridges as an intermediate member of the width expansion material for road bridges can be improved, and even when an impact, such as an earthquake and a wheel load, is added to a road, it may be damaged. No need for re-repair and contribute to road safety.

尚、前記地覆11Aの底面部11d、背面部11c、腹板13、フランジ延伸部15及び腹板のフランジ23を一つの部材で構成することができ、溶接手段や固定手段を省略し、工期の短縮を実現することができる。また、図4に於いて11gは前記地覆11Aの上面部11bと前面部11aとの継目であって長さ方向に隙間を形成している。この継目11gは図5に示すように上面部11bの下面に支持板11hを溶接手段やボルト等の締結部品で固定する。そして該継目11gを閉塞する。 The bottom surface portion 11d, the back surface portion 11c, the abdominal plate 13, the flange extending portion 15 and the abdominal plate flange 23 of the ground cover 11A can be constituted by a single member, omitting welding means and fixing means, Can be shortened. Further, in FIG. 4, 11g is a joint between the upper surface portion 11b and the front surface portion 11a of the ground cover 11A and forms a gap in the length direction. As shown in FIG. 5, the seam 11g fixes the support plate 11h to the lower surface of the upper surface portion 11b with fastening means such as welding means and bolts. Then, the seam 11g is closed.

次に本発明に係る道路橋用幅員拡張材の支柱部材としての道路橋用幅員拡張材10Bについて説明する。
図7は図1の矢視B−B線方向から見た本発明に係る道路橋用幅員拡張材の設置方法の実施の形態の一例を示すものであって、地覆の内部に略T字状支持部材を備えた道路橋用幅員拡張材の支柱部材としての道路橋用幅員拡張材を示す垂直拡大断面図である。図8は図7に示す道路橋用幅員拡張材を上方から見た斜視図である。図9は図7に示す道路橋用幅員拡張材に於いて下方から見た斜視図である。図10は図7に示す道路橋用幅員拡張材に於ける地覆の内部に備えた略T字状支持部材の構成を明示する斜視図である。
Next, the width expansion material 10B for road bridges as a column member of the width expansion material for road bridges according to the present invention will be described.
FIG. 7 shows an example of an embodiment of a method for installing a width extension material for a road bridge according to the present invention as seen from the direction of the arrow B-B in FIG. It is a vertical expanded sectional view which shows the width expansion material for road bridges as a support | pillar member of the width expansion material for road bridges provided with the shape support member. FIG. 8 is a perspective view of the road bridge width expanding material shown in FIG. 7 as viewed from above. FIG. 9 is a perspective view of the road bridge width expanding material shown in FIG. 7 as viewed from below. FIG. 10 is a perspective view clearly showing the configuration of a substantially T-shaped support member provided inside the ground cover in the road bridge width expanding material shown in FIG.

図7に於いて10Bは本発明に係る道路橋用幅員拡張材の支柱部材としての道路橋用幅員拡張材の設置状態であって、工場で当該道路橋用幅員拡張材を製作し、現場の条件及び施工性等を考慮して所望のサイズのユニットとして形成されている。11Bは道路橋用幅員拡張材10Bのうち略箱状体でなる鋼製中空筒体すなわち地覆を指示しており、前面部11a、上面部11b、背面部11c及び底面部11dの各面部から構成されている。これら各面部11a、11b、11c及び11dは単一の鋼板でなっており、各面部の接合部は溶着されている。図8に示すように前面部11aの上端は背面方向に滑らかに屈曲して施工後の共用に配慮してある。 In FIG. 7, 10B is the installation state of the width expansion material for road bridges as a support | pillar member of the width expansion material for road bridges based on this invention, Comprising: The said width expansion material for road bridges is manufactured in a factory, It is formed as a unit of a desired size in consideration of conditions and workability. 11B designates a steel hollow cylindrical body that is a substantially box-like body of the width expanding member 10B for road bridges, that is, a ground cover. From each surface portion of the front surface portion 11a, the upper surface portion 11b, the back surface portion 11c, and the bottom surface portion 11d It is configured. Each of these surface portions 11a, 11b, 11c, and 11d is a single steel plate, and the joint portion of each surface portion is welded. As shown in FIG. 8, the upper end of the front surface portion 11a is bent smoothly in the back surface direction so that it can be shared after construction.

12は鋼製中空筒体つまり地覆11Bの前面方向に突設された延伸部であって、底面部11dと一体成形されている。延伸部12と底面部11dでなる一体成形部材すなわち底板部の略中央には、図7及び図8に示すように鋼製中空筒体つまり地覆11Bの長さ方向に一連に垂下固定した略矩形の腹板13が設けられている。補強リブ14は該腹板13に対して直角方向には図9及び図10に示すように周囲が略不等辺四角形又は台形状からなる腹板13の補強リブ14が所定の等間隔にて、例えば図1に示すように複数個又は多数個を列設している。該腹板13の補強リブ14、14の相互間で囲われた腹板13には、図1で示すようにその略中央に略長円形のボルト穴13aが1個又は2個並設されている。ここでは、各面ごとに1個又は2個のボルト穴13a、13aを連設しているが、現場の条件により配設数は調整すればよい。 Reference numeral 12 denotes a steel hollow cylindrical body, that is, an extending portion projecting in the front direction of the ground cover 11B, and is integrally formed with the bottom surface portion 11d. In the substantially central part of the integrally formed member consisting of the extending portion 12 and the bottom surface portion 11d, that is, the bottom plate portion, as shown in FIG. 7 and FIG. A rectangular belly plate 13 is provided. As shown in FIGS. 9 and 10, the reinforcing ribs 14 of the abdominal plate 13 whose periphery is a substantially unequal square or trapezoidal shape are arranged at predetermined equal intervals in a direction perpendicular to the abdominal plate 13. For example, as shown in FIG. 1, a plurality or a plurality are arranged. As shown in FIG. 1, the belly plate 13 surrounded by the reinforcing ribs 14 and 14 of the belly plate 13 has one or two substantially oval bolt holes 13a arranged substantially in the center. Yes. Here, one or two bolt holes 13a, 13a are connected to each surface, but the number of arrangements may be adjusted according to the conditions at the site.

前記地覆11Bの内部には、例えば図10に示すように略T字状支持部材24を配置している。24は前記鋼製中空筒体つまり地覆11Bの長さ方向略中央部に垂直方向に立設した略T字状支持部材であって、地覆11Bの前面部11a、底面部11d及び背面部11cの内壁面にそれぞれ溶着されていてフランジ24aと該フランジ24aの下面に垂直方向に立設した垂直板部24bとを有し、両者を溶着してなる。略T字状支持部材24は、例えば前記腹板13の各補強リブ14、14のうち中央に位置する補強リブ14の取付位置と底面部11dを挟んで垂直方向の同一位置に取付られている。そして当該本発明に係る道路橋用幅員拡張材の支柱部材としての道路橋用幅員拡張材10Bの特徴は地覆11Bの延伸部12の上面に補強リブを備えていない。フランジ24aは複数の孔24c・・・・を穿孔しており、地覆11Bの上面部11bに複数個を形成した車両防護柵取付孔11jに適合させこれにボルト、ナット等締結部材を上方から挿入し、上面部11bを介して車両防護柵25を取り付ける。24d、24dはフランジ24aの下面であって、かつ垂直板部24bの左右側面に例えば4個適宜間隔を有して突設したフランジ補強リブ24e、24e間に介設・固定されたフランジ補強版である。フランジ補強板24dは地覆11Bの上面部11bを介してフランジ24aにボルト、ナット等締結部材で固定した前記車両防護柵25の剛性を高める。フランジ補強板24dは車両防護柵25が車両等の衝突などで外力を受けた際に発生する曲げモーメントによってフランジ24aが変形することを防止する。 A substantially T-shaped support member 24 is disposed inside the ground cover 11B, for example, as shown in FIG. Reference numeral 24 denotes a substantially T-shaped support member that is vertically erected in the longitudinal center of the steel hollow cylinder, that is, the ground cover 11B, and includes a front surface portion 11a, a bottom surface portion 11d, and a back surface portion of the ground cover 11B. 11c, and has a flange 24a and a vertical plate portion 24b standing vertically on the lower surface of the flange 24a, and both are welded. The substantially T-shaped support member 24 is attached to the same position in the vertical direction across the bottom portion 11d and the attachment position of the reinforcement rib 14 located in the center of the reinforcement ribs 14 and 14 of the abdominal plate 13, for example. . A feature of the road bridge width expanding material 10B as a support member of the road bridge width expanding material according to the present invention is that no reinforcing rib is provided on the upper surface of the extending portion 12 of the ground cover 11B. The flange 24a has a plurality of holes 24c,... Adapted to a vehicle protection fence mounting hole 11j formed in the upper surface portion 11b of the ground cover 11B, and fastening members such as bolts and nuts from above. Insert the vehicle guard fence 25 through the upper surface portion 11b. Reference numerals 24d and 24d are lower surfaces of the flange 24a, and for example, four flange reinforcing plates that are interposed and fixed between flange reinforcing ribs 24e and 24e that protrude from the left and right side surfaces of the vertical plate portion 24b with an appropriate interval. It is. The flange reinforcing plate 24d enhances the rigidity of the vehicle protection fence 25 fixed to the flange 24a with a fastening member such as a bolt or a nut via the upper surface portion 11b of the ground cover 11B. The flange reinforcing plate 24d prevents the flange 24a from being deformed by a bending moment generated when the vehicle protection fence 25 receives an external force due to a collision of a vehicle or the like.

24e、24eは図10に示すように、垂直板部24bの左・右側面及び前記平フランジ補強板24d、24dの両端部に配置・溶着したフランジ補強リブであって、フランジ24aの下面の左右にそれぞれ2個備えている。フランジ補強リブ24e、24eは、前記車両防護柵25が車両等の衝突などの外力を受けた際に発生する曲げモーメントによってフランジ24aが変形することを防止する共に、併せて垂直板部24bの変形も防止できる。 As shown in FIG. 10, 24e and 24e are flange reinforcing ribs arranged and welded to the left and right side surfaces of the vertical plate portion 24b and both ends of the flat flange reinforcing plates 24d and 24d. Each has two. The flange reinforcing ribs 24e and 24e prevent the flange 24a from being deformed by a bending moment generated when the vehicle guard fence 25 receives an external force such as a collision of the vehicle, and at the same time, deform the vertical plate portion 24b. Can also be prevented.

前記腹板13の下端には前記地覆11Bの延伸部12と略平行に所定長のフランジ延伸部15を固定・配設している。そして、前記延伸部12、腹板13及びフランジ延伸部15は全体としての側面形状が略コ字状に形成してあり、この略コ字状の部分にエポキシ樹脂層21及び下地処理用モルタル層22を介在させて延伸部12の下面に配置されるコンクリート床板18を保持・固定する。前記延伸部12、腹板13及びフランジ延伸部15はそれぞれが各別部材として溶着手段により固定・配置するが、一つの部材で一体構成することも可能である。 A flange extending portion 15 having a predetermined length is fixed and disposed at the lower end of the abdomen plate 13 substantially in parallel with the extending portion 12 of the ground cover 11B. The stretched portion 12, the stomach plate 13 and the flange stretched portion 15 are formed in a substantially U-shaped side surface as a whole, and an epoxy resin layer 21 and a ground treatment mortar layer are formed on the approximately U-shaped portion. The concrete floor board 18 arrange | positioned on the lower surface of the extending | stretching part 12 through 22 is hold | maintained and fixed. The extending portion 12, the abdominal plate 13, and the flange extending portion 15 are each fixed and arranged as a separate member by welding means, but may be integrally configured by one member.

底面部11dには図10で示す略楕円形又は矩形の例えば100(mm)×150(mm)の作業用穴11iが複数個、例えば2個設けられており、前記車両防護柵25と略T字状支持部材24との締結に使用するボルト、ナット等締結部材の挿入作業やその溶接作業を行う。該作業用穴11iは、地覆11Bの底面部であって略T字状支持部材24が立設する位置の左・右部位それぞれ穿孔する。具体的には図10に示すように2個を穿孔する。
また、延伸部12には略円形又は楕円形のボルト穴12a、12bが設けられている。そしてこのボルト穴12a、12bを介してコンクリートアンカー16、アンカーボルト17をコンクリート床版18に打込む。
A plurality of, for example, two, for example, 100 (mm) × 150 (mm) work holes 11i having a substantially oval or rectangular shape shown in FIG. Insertion work and welding work of fastening members such as bolts and nuts used for fastening with the letter-shaped support member 24 are performed. The working hole 11i is a bottom surface portion of the ground cover 11B, and the left and right portions of the position where the substantially T-shaped support member 24 stands is drilled. Specifically, two holes are drilled as shown in FIG.
The extending portion 12 is provided with substantially circular or elliptical bolt holes 12a and 12b. Then, the concrete anchor 16 and the anchor bolt 17 are driven into the concrete floor slab 18 through the bolt holes 12a and 12b.

前記延伸部12の上面にはコンクリートないし樹脂モルタル舗装19を敷設する。このコンクリートないし樹脂モルタル舗装19の前方つまり図7の左方向に隣接して前記コンクリート床版18の上面に例えばアスファルト舗装20を敷設する。また前述したように前記延伸部12の下面、腹板13の前面及びフランジ延伸部15の上面には例えば厚さ5(mm)程度のエポキシ樹脂層21を注入する。このエポキシ樹脂層21の下面及び前記腹板13の前面や前記フランジ延伸部15の上面には下地処理用モルタル層22を介在してある。このように構成したので支柱部材としての道路橋用幅員拡張材10Bをコンクリート床板18に確実に固定しかつ、衝撃に強い構造を実現すると共に雨水等の流入を完全に防止し気密性の高い道路橋用幅員拡張材10Bを提供できる。 Concrete or resin mortar pavement 19 is laid on the upper surface of the extending portion 12. For example, asphalt pavement 20 is laid on the upper surface of the concrete floor slab 18 in front of the concrete or resin mortar pavement 19, that is, adjacent to the left direction in FIG. Further, as described above, for example, the epoxy resin layer 21 having a thickness of about 5 (mm) is injected into the lower surface of the extending portion 12, the front surface of the abdominal plate 13, and the upper surface of the flange extending portion 15. A grounding mortar layer 22 is interposed on the lower surface of the epoxy resin layer 21, the front surface of the stomach plate 13, and the upper surface of the flange extending portion 15. Since it is configured in this manner, the road bridge width expanding member 10B as a support member is securely fixed to the concrete floor 18 and a structure resistant to impact is realized, and inflow of rainwater and the like is completely prevented, and the road is highly airtight. The width expansion material 10B for bridges can be provided.

前記腹板13を基点としてつまり、腹板13の後面に前記フランジ延伸部15の反対方向すなわち後方には所定幅を有する板状の腹板のフランジ23を備えている。この腹板のフランジ23は図9に示すように地覆11Bの背面部11cの下端と、前記腹板13の下端との間に溶接手段等によりその端部を固定され、相互間隔を有し、複数個、例えば3個を配備している。そして該腹板のフランジ23は図9に示すように前記底面部11dの下面に設置した各補強リブ14の下端にそれぞれ固定する。従って、該腹板のフランジ23の設置数は補強リブ14と同一数となり両者の全体側面形状は略T字状となる。このように構成したので、道路橋用幅員拡張材の支柱部材としての道路橋用幅員拡張材10Bの耐荷性を向上させ道路上に地震や輪荷重等衝撃が加わったときにも毀損することがなくまた再補修の必要がなく道路の安全性に寄与する。 With the abdomen 13 as a base point, that is, on the rear surface of the abdomen 13, a plate-like abdomen flange 23 having a predetermined width is provided in the opposite direction of the flange extending portion 15, that is, in the rear. As shown in FIG. 9, the end of the flange 23 of the abdomen is fixed by welding means or the like between the lower end of the back part 11c of the ground cover 11B and the lower end of the abdomen 13 and has a mutual interval. A plurality, for example, 3 are provided. Then, the flange 23 of the abdomen is fixed to the lower end of each reinforcing rib 14 installed on the lower surface of the bottom surface portion 11d as shown in FIG. Accordingly, the number of the flanges 23 of the abdominal plate installed is the same as the number of the reinforcing ribs 14, and the overall side surface shape of both is substantially T-shaped. Since it comprised in this way, the load resistance of the width expansion material 10B for road bridges as a support | pillar member of the width expansion material for road bridges can be improved, and even when an impact such as an earthquake or a wheel load is applied to the road, damage may occur. No need for re-repair and contribute to road safety.

前記地覆11Bの底面部11d、背面部11c、腹板13、フランジ延伸部15及び腹板のフランジ23を一つの部材で構成することができ、溶接手段や固定手段を省略し、工期の短縮を実現することができる。 The bottom surface portion 11d, the back surface portion 11c, the abdominal plate 13, the flange extending portion 15 and the abdominal plate flange 23 of the ground cover 11B can be constituted by one member, omitting welding means and fixing means, and shortening the construction period. Can be realized.

前述した本発明に係る道路橋用幅員拡張材を道路橋に組付ける際は、中間部材としての道路橋用幅員拡張材10Aと支柱部材としての道路橋用幅員拡張材10Bとを図1に示すように連結する。図1に示すものは左側から支柱部材としての道路橋用幅員拡張材10Bを2個連続して連結し、次に中間部材としての道路橋用幅員拡張材10Aと該支柱部材としての道路橋用幅員拡張材10Bを交互に連結した構成である。
尚、図1に示す構成例は一例であって現場の状況に応じて中間部材及び支柱部材に係る道路橋用幅員拡張材10A、10Bを適宜編成・組み合わせることは可能である。また両道路橋用幅員拡張材10A、10Bの各個の間には幅長5(mm)程度の目地(隙間)10Cを介して連結することを通例とするが、これに限定されず、例えば予め複数個を溶着して連結して構成された両道路橋用幅員拡張材10A、10Bを現場で設置し、当該目地(隙間)10Cの部位を適宜選定してもよい。
When assembling the above-mentioned road bridge width expanding material according to the present invention on a road bridge, FIG. 1 shows a road bridge width expanding material 10A as an intermediate member and a road bridge width expanding material 10B as a support member. Connect as follows. In FIG. 1, two road bridge width expansion members 10B as strut members are connected in series from the left side, and then a road bridge width expansion material 10A as an intermediate member and the road bridge as the strut member. It is the structure which connected the width expansion material 10B alternately.
The configuration example shown in FIG. 1 is an example, and the road bridge width expanding materials 10A and 10B related to the intermediate member and the support member can be appropriately knitted and combined according to the situation at the site. In addition, it is customary to connect between the width extension members 10A, 10B for both road bridges via joints (gap) 10C having a width of about 5 (mm). The width expansion members 10A and 10B for both road bridges configured by welding and connecting a plurality may be installed on site, and the joint (gap) 10C may be selected as appropriate.

次に本発明に係る道路橋用幅員拡張材の設置方法について道路橋への施工例を詳細に説明する。
第1に、工場に於いて所要数の中間部材としての道路橋用幅員拡張材10A及び支柱部材としての道路橋用幅員拡張材10Bを製造して、それぞれの道路橋用幅員拡張材10A、10Bを幅員を拡張する道路橋の施工現場に搬入する。
そして、幅員を拡張する道路橋の路肩に於いて道路橋の全長に亘り地覆の延伸部12を設置するのに必要な幅寸法の例えばアスファルト舗装20をブレーカー等の工具によりコンクリート床版18から除去する。また、露出したコンクリート床版18の上面と同一面に於いて、既存のコンクリート製の地覆(図示せず)をコンクリートカッタ等で切断及び/またはハツリ除去する。ハツリ除去とは上記工具等でコンクリート床版18の上面を平坦になるように薄く切削・除去することをいう。次に、道路橋用幅員拡張材10A、10Bの寸法に基づいてコンクリート床版18の上面及び側面にボルト孔12a、12b、13aの位置を罫書きする。このとき、道路橋の両側端部、いわゆる橋の袂に支柱部材としての道路橋用幅員拡張材10Bを少なくとも4個設置し、道路橋の長さ方向に亘って、中間部材としての道路橋用幅員拡張材10A及び支柱部材としての道路橋用幅員拡張材10Bを図1及び図2に示すように適宜配置する。
Next, the construction example to the road bridge will be described in detail with respect to the method for installing the width extension material for road bridge according to the present invention.
First, a road bridge width expanding material 10A as a required number of intermediate members and a road bridge width expanding material 10B as a strut member are manufactured in a factory, and each road bridge width expanding material 10A, 10B is manufactured. To the construction site of the road bridge to expand the width.
Then, for example, asphalt pavement 20 having a width dimension necessary for installing the extended portion 12 of the ground cover over the entire length of the road bridge at the shoulder of the road bridge to expand the width is removed from the concrete floor slab 18 with a tool such as a breaker. Remove. Further, on the same surface as the upper surface of the exposed concrete floor slab 18, an existing concrete ground cover (not shown) is cut and / or scraped with a concrete cutter or the like. The chipping means that the upper surface of the concrete slab 18 is thinly cut and removed with the above-mentioned tool or the like. Next, the positions of the bolt holes 12a, 12b, and 13a are marked on the upper and side surfaces of the concrete slab 18 based on the dimensions of the road bridge width expanding members 10A and 10B. At this time, at least four road bridge width expanding members 10B as support members are installed on both side ends of the road bridge, so-called bridge ridges, and for the road bridge as an intermediate member over the length direction of the road bridge. The width expansion material 10A and the width expansion material 10B for a road bridge as a support member are appropriately arranged as shown in FIGS.

更に、コンクリート床版18の罫書き位置に於いてダイヤモンドコア等を取付けたコアドリルを用いて、ボルト13b、コンクリートアンカー16及びアンカーボルト17用の孔を穿孔する。そして、高圧洗浄機等を用いてコンクリート床版18の前記の加工面の清掃を行う。第2に、道路橋用幅員拡張材10A及び10Bをコンクリート床版18に設置したとき、コンクリート床版18を延伸部12の下面と腹板13の前面とフランジ延伸部15の上面に均等に接触させるために、コンクリート床版18の不陸すなわち凹凸ないしうねりが著しい場合には下地処理用モルタル層22を左官仕上げする。すなわち前記3面に対向するコンクリート床版18の3面の所定範囲にモルタル又は無収縮モルタルを適宜の厚さにて左官仕上げして、平滑な平面を施工する。工場から施工現場に搬入した道路橋用幅員拡張材10A、10Bを前記した配列によって、コンクリート床版18に仮置きする。このとき、道路橋用幅員拡張材10A、10Bの上面部11bは全て取外しておく。そしてボルト孔13を介してボルト13bで腹板13をコンクリート床版18に締め付け固定し、続いてボルト穴12a、12bを介してコンクリートアンカー16及びアンカーボルト17で延伸部12をコンクリート床版18に締め付け固定する。 Furthermore, holes for bolts 13b, concrete anchors 16 and anchor bolts 17 are drilled using a core drill with a diamond core or the like attached at the marking position of the concrete floor slab 18. Then, the processed surface of the concrete floor slab 18 is cleaned using a high-pressure washing machine or the like. Secondly, when the road bridge width expanding members 10A and 10B are installed on the concrete floor slab 18, the concrete floor slab 18 is uniformly contacted with the lower surface of the extending portion 12, the front surface of the abdomen plate 13, and the upper surface of the flange extending portion 15. For this reason, when the concrete floor slab 18 is uneven, that is, when the unevenness or undulation is significant, the mortar layer 22 for surface treatment is plastered. That is, a mortar or a non-shrink mortar is plastered to an appropriate thickness in a predetermined range of three surfaces of the concrete floor slab 18 facing the three surfaces, and a smooth flat surface is constructed. The road bridge width expanding materials 10A and 10B carried into the construction site from the factory are temporarily placed on the concrete floor slab 18 by the arrangement described above. At this time, all the upper surface portions 11b of the road bridge width expanding members 10A and 10B are removed. Then, the belly plate 13 is fastened and fixed to the concrete floor slab 18 with bolts 13b through the bolt holes 13, and then the extending portion 12 is attached to the concrete floor slab 18 with concrete anchors 16 and anchor bolts 17 through the bolt holes 12a and 12b. Tighten and fix.

第3に、コンクリート床版及び下地処理用モルタル層が接する前記中間部材としての道路橋用幅員拡張材と前記支柱部材としての道路橋用幅員拡張材とでなる目地10Cを全てシール材でシールを行う。そしてコンクリート床版18と延伸部12の下面、腹板13の前面及びフランジ延伸部15の上面の間で形成させる隙間にエポキシ樹脂を注入・充填する。また上面部11bを道路橋用幅員拡張材10A、10Bにボルト締めして固定する。第4に上面部11bと前面部11aの継目11g、上面部11bと背面部11cの突合せ部及び目地10Cの未だシール処理を行っていない部位等を前記シール材でシール処理して地覆すなわち鋼製中空筒体を密封し、鋼製中空筒体内に雨水等が流入・浸入することを防止する。そして車両防護柵取付孔11jに車両防護柵25をボルトで締付・固定する。図3及び図7に示すように、延伸部12の上面にコンクリートないし樹脂モルタル舗装19を打設して延伸部12、コンクリートアンカー16及びアンカーボルト17を被覆すると共に、コンクリートないし樹脂モルタル舗装19の上面を既存の例えばアスファルト舗装20と面一に仕上げる。最後に必要であれば、道路橋用幅員拡張材10A、10Bを塗装して施工を完了する。 Third, concrete slab and the intermediate member as whole by Lumpur eyes land 10C made of a highway bridge for width expansion material as the strut member and highway bridge for width expansion material which primed mortar layer is in contact Seal with material. Then, an epoxy resin is injected and filled into a gap formed between the concrete slab 18 and the lower surface of the extending portion 12, the front surface of the abdomen plate 13, and the upper surface of the flange extending portion 15. Moreover, the upper surface part 11b is bolted and fixed to the width expansion materials 10A and 10B for road bridges. Fourthly, the seam 11g of the upper surface portion 11b and the front surface portion 11a, the butted portion of the upper surface portion 11b and the rear surface portion 11c, and the portion of the joint 10C that has not yet been subjected to the sealing treatment are sealed with the sealing material to cover the ground, that is, the steel. The hollow cylinder made of steel is sealed to prevent rainwater and the like from flowing into and entering the hollow steel cylinder. Then, the vehicle protection fence 25 is fastened and fixed to the vehicle protection fence mounting hole 11j with bolts. As shown in FIG. 3 and FIG. 7, concrete or resin mortar pavement 19 is placed on the upper surface of the extending portion 12 to cover the extending portion 12, the concrete anchor 16 and the anchor bolt 17, and the concrete or resin mortar pavement 19 is covered. The upper surface is finished flush with an existing asphalt pavement 20, for example. Finally, if necessary, the road bridge width expanding materials 10A and 10B are painted to complete the construction.

このような設置方法によれば、前記道路橋用幅員拡張材10Aは車両等の衝撃荷重に耐えうる構造にして軽量化を図り、前記道路橋用幅員拡張材10Bは車両防護柵25が車両等による衝突荷重に耐えうる強固な構造として道路橋用幅員拡張材のユニット化を図ったので道路橋全体に於ける道路橋用幅員拡張材10A、10Bの総重量を軽量化できるという効果があり、道路橋用幅員拡張材10A、10Bの各々の長さを比較的短く例えば1(m)とすることにより、既設のコンクリート床版の水平レベルすなわち傾斜に沿って道路橋用幅員拡張材10A、10Bを設置できる。その結果コンクリート床版18と道路橋用幅員拡張材10A、10Bの設置面に於ける隙間を少なくすることができ、隙間に充填する材料例えばエポキシ樹脂の量を少なくすることができる。そして施工性が向上すると共に十分な施工強度を得られる。また、コンクリート床版18と延伸部12の下面、腹板13の前面及びフランジ延伸部15の上面の間で形成させる隙間にエポキシ樹脂を注入・充填して接着する設置方法であるから、道路橋用幅員拡張材10A、10Bに車両等による衝突荷重が作用したとき、道路橋用幅員拡張材10A、10Bからコンクリート床版18への衝撃荷重が接着面全体に分散して作用するので、ボルト等の締結部材の締結部位の周辺に荷重が集中することを防止でき、該締結部位でのコンクリート床版18の破壊・破断を有効に防止できる。更に、フランジ延伸部15を設けて、従来技術に於いて延伸部12上に必要とされた補強リブを廃止したので、当該道路橋用幅員拡張材10A、10Bをコンクリート床版18に設置した後に復旧工事として行う延伸部12に於けるコンクリートないし樹脂モルタル舗装19の厚みを自由に調整することができて既存の例えばアスファルト舗装20と面一若しくは低く仕上げることができ、雨水等を路肩26において効率よく流過させる路肩形状を容易に舗装・施工することができる。
尚、図1及び図2に示すように中間部材としての道路橋用幅員拡張材10A及び支柱部材としての道路橋用幅員拡張材10Bを交互に配置しているが、道路橋の使用条件等によって、中間部材としての道路橋用幅員拡張材10A及び支柱部材としての道路橋用幅員拡張材10Bの設置個数を適宜変更してもよく、例えば中間部材としての道路橋用幅員拡張材10Aのみを道路橋全長に設置してもよいし、道路橋用幅員拡張材10Bのみを道路橋全長に設置してもよい。
According to such an installation method, the road bridge width expansion member 10A can be constructed to withstand an impact load of a vehicle or the like to reduce the weight, and the road bridge width expansion member 10B has a vehicle protection fence 25 provided to the vehicle or the like. As a solid structure that can withstand the impact load due to the unitization of the width expansion material for road bridges, there is an effect that the total weight of the width expansion materials 10A, 10B for road bridges in the entire road bridge can be reduced, By setting the length of each of the road bridge width expanding materials 10A and 10B to be relatively short, for example, 1 (m), the width expanding material 10A and 10B for the road bridge along the horizontal level, that is, the inclination of the existing concrete floor slab. Can be installed. As a result, it is possible to reduce gaps between the concrete floor slab 18 and the road bridge width expanding materials 10A and 10B, and to reduce the amount of material, for example, epoxy resin, that fills the gaps. And workability improves and sufficient construction strength is obtained. Moreover, since it is the installation method which inject | pours and fills an epoxy resin in the clearance gap formed between the concrete floor slab 18 and the lower surface of the extending | stretching part 12, the front surface of the abdominal board 13, and the upper surface of the flange extending part 15, it is a road bridge. When a collision load due to a vehicle or the like acts on the width expanding members 10A and 10B, the impact load from the road bridge width expanding materials 10A and 10B to the concrete floor slab 18 is dispersed and acts on the entire bonding surface. The load can be prevented from concentrating around the fastening part of the fastening member, and the breakage and fracture of the concrete slab 18 at the fastening part can be effectively prevented. Further, since the flange extending portion 15 is provided and the reinforcing ribs required on the extending portion 12 in the prior art are eliminated, the road bridge width expanding members 10A and 10B are installed on the concrete floor slab 18. The thickness of the concrete or resin mortar pavement 19 in the extending portion 12 to be restored can be adjusted freely, and can be finished flush with or lower than that of the existing asphalt pavement 20, for example. Pavement and construction can be easily performed with a shoulder shape that flows well.
As shown in FIG. 1 and FIG. 2, the road bridge width expanding material 10A as an intermediate member and the road bridge width expanding material 10B as a support member are alternately arranged. The installation number of the road bridge width expansion material 10A as the intermediate member and the road bridge width expansion material 10B as the support member may be appropriately changed. For example, only the road bridge width expansion material 10A as the intermediate member You may install in the full length of a bridge, and you may install only the width expansion material 10B for road bridges in the full length of a road bridge.

中間部材としての道路橋用幅員拡張材10A及び支柱部材としての道路橋用幅員拡張材10Bの施工手順を示したが、施工手順は前記手順に限定されるものではなく、施工現場の状況に応じて変更できることは当然である。また中間部材としての道路橋用幅員拡張材10A及び支柱部材としての道路橋用幅員拡張材10Bを工場で製造し、単独で道路橋の幅員拡張現場に搬入した後に、前記道路橋用幅員拡張材10A及び10Bを連接して施工する例を示したが、中間部材としての道路橋用幅員拡張材10A及び支柱部材としての道路橋用幅員拡張材10Bを工場で予め所望数、例えば一個づつ連接して一体化して道路橋の幅員拡張現場に搬入することで、施工現場での工事期間を短縮することもできる。 Although the construction procedure of the road bridge width expansion material 10A as the intermediate member and the road bridge width expansion material 10B as the support member has been shown, the construction procedure is not limited to the above procedure, and depends on the situation of the construction site. Of course, it can be changed. Further, the road bridge width expanding material 10A as an intermediate member and the road bridge width expanding material 10B as a strut member are manufactured at a factory and carried alone to the road bridge width expanding site, and then the road bridge width expanding material. Although 10A and 10B are connected and constructed, the road bridge width expansion material 10A as an intermediate member and the road bridge width expansion material 10B as a strut member are connected in advance at the factory in a desired number, for example, one by one. It is possible to shorten the construction period at the construction site by bringing them together into the width expansion site of the road bridge.

10A 中間部材としての道路橋用幅員拡張材
10B 支柱部材としての道路橋用幅員拡張材
10C 目地(隙間)
11A 地覆(鋼製中空筒体)
11B 地覆(鋼製中空筒体)
11a 前面部
11b 上面部
11c 背面部
11d 底面部
11e 略輪環状補強リブ
11f 作業用穴
11g 継目
11h 支持板
11i 作業用穴
11j 車両防護柵等取付孔
12 延伸部
12a ボルト穴
12b ボルト穴
13 腹板
13a ボルト穴
13b ボルト
14 補強リブ
15 フランジ延伸部
16 コンクリートアンカー
17 アンカーボルト
18 コンクリート床版
19 コンクリートないし樹脂モルタル舗装
20 アスファルト舗装
21 エポキシ樹脂層
22 下地処理用モルタル層
23 腹板のフランジ
24 略T字状支持部材
24a フランジ
24b 垂直板部
24c 孔
24d フランジ補強板
24e フランジ補強リブ
25 車両防護柵
26 路肩

10A Road Bridge Width Expansion Material 10B as Intermediate Member Road Bridge Width Expansion Material 10C Joint (Gap)
11A Ground cover (steel hollow cylinder)
11B Ground cover (steel hollow cylinder)
11a Front portion 11b Upper surface portion 11c Back surface portion 11d Bottom surface portion 11e Substantially annular reinforcing rib 11f Work hole 11g Seam 11h Support plate 11i Work hole 11j Mounting hole 12 such as vehicle protection fence Extending portion 12a Bolt hole 12b Bolt hole 13 Abdominal plate 13a Bolt hole 13b Bolt 14 Reinforcing rib 15 Flange extension 16 Concrete anchor 17 Anchor bolt 18 Concrete floor slab 19 Concrete or resin mortar pavement 20 Asphalt pavement 21 Epoxy resin layer 22 Grounding mortar layer 23 Abdominal plate flange 24 Roughly T-shaped Support member 24a flange 24b vertical plate portion 24c hole 24d flange reinforcement plate 24e flange reinforcement rib 25 vehicle guard fence 26 road shoulder

Claims (1)

道路橋に於ける幅員拡張材の設置方法であって、コンクリート床版とコンクリート製の地覆で構成された道路橋に於いて、単一の鋼板で形成された前面部、背面部及び底面部の各接合部を溶着すると共に該前面部と上面部との継目の下面に支持板で該上面部をボルトで締結した略箱状体でなる鋼製中空筒体と、該鋼製中空筒体の内部に固定した略輪環状補強リブと、該鋼製中空筒体の前面方向に突設された延伸部と一体形成された底面部の略中央に長さ方向に一連に垂下固定した略矩形の腹板と、該腹板に対して直角方向に周囲が略不等辺四角形かつ所定の等間隔に列設した該腹板の補強リブと、前記腹板の下端から前記延伸部に略平行にかつ該鋼製中空筒体の前面方向に固定・配設したフランジ延伸部と、前記腹板の背面に備えたフランジとで構成した中間部材としての道路橋用幅員拡張材及び単一の鋼板で形成された前面部、背面部及び底面部の各接合部を溶着すると共に該前面部と上面部との継目の下面に支持板で該上面部をボルトで締結した略箱状体でなる鋼製中空筒体と、該鋼製中空筒体の内部に固定した略T字状支持部材と、前記底面部であって略T字状支持部材の左・右部位に穿孔した作業用穴と、前記上面部に複数個を形成した車両防護柵取付孔と、該鋼製中空筒体の前面方向に突設された延伸部と一体形成された底面部の略中央に長さ方向に一連に垂下固定した略矩形の腹板と、該腹板に対して直角方向に周囲が略不等辺四角形かつ所定の等間隔に列設した該腹板の補強リブと、前記腹板の下端から前記延伸部に略平行にかつ該鋼製中空筒体の前面方向に固定・配設したフランジ延伸部と、前記腹板の背面に備えたフランジとで構成した支柱部材としての道路橋用幅員拡張材を施工現場に複数個搬入し、第1に道路橋の全長に亘り前記延伸部を設置するために必要な幅寸法の舗装をコンクリート床版から除去しかつ露出したコンクリート床版の上面と同一面に於いて既存のコンクリート製の地覆を切断及び/またはハツリ除去すると共に前記道路橋用幅員拡張材の寸法に基づいてコンクリート床版の上面及び側面にボルト孔の位置を罫書きし、コンクリート床版の罫書き位置に於いてボルト孔を穿孔し、第2に前記コンクリート床版下地処理用モルタル層を介在させて、前記道路橋用幅員拡張材をコンクリート床版に仮置きし、前記上面部は全て取外し、ボルト・ナットにより前記道路橋用幅員拡張材をコンクリート床版に締め付け固定し、第3にコンクリート床版及び下地処理用モルタル層が接する前記中間部材としての道路橋用幅員拡張材と前記支柱部材としての道路橋用幅員拡張材との端面及び前記中間部材としての道路橋用幅員拡張材と前記支柱部材としての道路橋用幅員拡張材との隣接部位に形成された目地をシール材でシール処理を行い、コンクリート床版と前記延伸部の下面、前記腹板の前面及び前記フランジ延伸部の上面の間で形成させる隙間に樹脂を注入・充填し、前記上面部を道路橋用幅員拡張材に固定し、第4に該上面部と前記前面部の継目、該上面部と前記背面部の突合せ部及び前記目地を前記シール材でシール処理し、道路橋用幅員拡張材の前記車両防護柵取付孔に車両防護柵を固定すると共に前記延伸部の上面にコンクリートをないし樹脂モルタル舗装を打設してその上面を既存の舗装と面一に仕上げることを特徴とする道路橋用幅員拡張材の設置方法。 A method for installing a width extension material in a road bridge, which is a road bridge composed of a concrete floor slab and a concrete cover. A steel hollow cylinder having a substantially box-like body in which the upper surface portion is fastened with a support plate to the lower surface of the joint between the front surface portion and the upper surface portion, and the steel hollow cylinder body. A substantially rectangular ring-shaped reinforcing rib fixed inside, and a substantially rectangular shape that is suspended and fixed in series in the length direction substantially at the center of the bottom portion integrally formed with the extending portion projecting in the front direction of the steel hollow cylindrical body The abdominal plate, a reinforcing rib of the abdominal plate that is arranged at a predetermined equal interval in a direction perpendicular to the abdominal plate, and substantially parallel to the extending portion from the lower end of the abdominal plate And a flange extending portion fixed and disposed in the front direction of the steel hollow cylinder, and a flange provided on the back surface of the abdomen plate Welding each joint part of the front part, back part and bottom part formed of a width extension material for road bridges and a single steel plate as an intermediate member formed on the lower surface of the joint between the front part and the top part A steel hollow cylinder formed of a substantially box-like body whose upper surface is fastened with a bolt with a support plate, a substantially T-shaped support member fixed inside the steel hollow cylinder, and the bottom surface substantially Working holes drilled in the left and right parts of the T-shaped support member, a plurality of vehicle guard fence mounting holes formed on the upper surface, and an extending portion projecting in the front direction of the steel hollow cylinder A substantially rectangular bell plate fixed in series in the length direction at the approximate center of the bottom portion formed integrally with the base plate, and a line with a substantially unequal quadrangle in the direction perpendicular to the abdominal plate and arranged at predetermined equal intervals. The reinforcing rib of the belly plate, and fixed in the front direction of the steel hollow cylinder from the lower end of the belly plate substantially parallel to the extending portion A plurality of road bridge width extension materials as strut members composed of a flange extending portion provided and a flange provided on the back surface of the abdomen are brought into the construction site, and firstly the extension over the entire length of the road bridge The pavement having a width dimension necessary for installing the section is removed from the concrete slab, and the existing concrete ground cover is cut and / or debris in the same plane as the upper surface of the exposed concrete slab. Based on the dimensions of the width expansion material for road bridges, the positions of bolt holes are marked on the upper and side surfaces of the concrete floor slab, and the bolt holes are drilled at the marking position of the concrete floor slab. Second, the concrete floor Temporarily placing the road bridge width expanding material on a concrete floor slab with a ground treatment mortar layer interposed in the plate, removing all the upper surface portion, and using the bolts and nuts , the road bridge width expanding material Are fixed to the concrete floor slab, and thirdly, the end face of the road bridge width expanding material as the intermediate member and the road bridge width expanding material as the strut member, which are in contact with the concrete floor slab and the ground treatment mortar layer, and The joint formed on the adjacent portion of the road bridge width expanding material as the intermediate member and the road bridge width expanding material as the support member is sealed with a sealing material, and the concrete floor slab and the lower surface of the extending portion Injecting and filling resin into a gap formed between the front surface of the abdomen and the upper surface of the flange extending portion, fixing the upper surface portion to a road bridge width expanding material, and fourth, the upper surface portion and the front surface And a joint portion of the upper surface portion and the back surface portion and the joint are sealed with the sealing material, and the vehicle protection fence is fixed to the vehicle protection fence mounting hole of the road bridge width expansion material and the extending portion Top surface of Installation of road bridges for width expansion material, characterized in that to finish the concrete or the resin mortar paved its upper surface to an existing pavement flush with Da設.
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