JP2015028246A - Steel bridge structure - Google Patents

Steel bridge structure Download PDF

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JP2015028246A
JP2015028246A JP2013157524A JP2013157524A JP2015028246A JP 2015028246 A JP2015028246 A JP 2015028246A JP 2013157524 A JP2013157524 A JP 2013157524A JP 2013157524 A JP2013157524 A JP 2013157524A JP 2015028246 A JP2015028246 A JP 2015028246A
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scaffolding
steel bridge
horizontal
steel
bridge
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JP5409955B1 (en
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晃生 白水
Akio Shiromizu
晃生 白水
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Yokogawa Construction Co Ltd
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Yokogawa Construction Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a steel bridge structure that eliminates the need to provide a curing net and a scaffolding separately, makes installation easier as compared with a conventional scaffolding, has high safety and good workability, and enables speedy steel bridge construction.SOLUTION: A steel bridge structure is a structure of a steel bridge including girders and a lateral bracing, a panel-like scaffolding lateral bracing on which a worker can get is installed between opposed girders, and two or more scaffolding lateral bracings are arranged between girders arranged opposite each other and fixed to the girders to be built. In the steel bridge structure, the scaffolding lateral bracings can be arranged and fixed on lower flanges of the girders to be built.

Description

本発明は、鋼鈑桁橋（鋼橋）構造に関し、特に、主桁間に横構を備えた鋼橋の構造（以下「鋼橋構造」という）に関する。   The present invention relates to a steel bridge girder bridge (steel bridge) structure, and more particularly to a steel bridge structure (hereinafter referred to as “steel bridge structure”) having a horizontal structure between main girders.

鋼橋の一つとして主桁にＩ形鋼を用いた鋼鈑桁橋が知られている。一般的な鋼鈑桁橋の一例を図４に示す。この鋼鈑桁橋は、橋脚Ａ上に複数の主桁Ｂが橋幅方向に間隔をあけて配置され、その主桁Ｂ上に床版Ｃが配置されている。主桁Ｂ間（図４の例では、Ｂ1とＢ2の間、Ｂ2とＢ3の間）に、横荷重（主として水平力）を負担する下横構Ｄや、横荷重に加えて鉛直荷重を負担する対傾構Ｅが配設されている。鋼鈑桁橋は、図４に示すもの以外にも広く知られており、例えば、特許文献１、２のものがある。 As one of steel bridges, a steel bridge girder bridge using I-shaped steel as a main girder is known. An example of a general steel girder bridge is shown in FIG. In this steel girder bridge, a plurality of main girders B are arranged on the pier A at intervals in the bridge width direction, and a floor slab C is arranged on the main girder B. In addition to the main frame B (in the example of FIG. 4, between B 1 and B 2 and between B 2 and B 3 ), the lower horizontal structure D that bears the lateral load (mainly horizontal force) and the lateral load An anti-tilt structure E that bears a vertical load is disposed. Steel girder bridges are widely known in addition to those shown in FIG.

従来、主桁Ｂの上フランジＦに床版Ｃを構築したり、下横構Ｄを構築したりする際は、主桁Ｂの下フランジＧの下面から５０ｃｍ程度の位置に足場（図示しない）を配置し、作業員が当該足場に載って前記構築作業を行っていた。足場は必要に応じて、上下に二段設けることもある。架設した足場は撤去するのが一般的である。   Conventionally, when the floor slab C is constructed on the upper flange F of the main girder B or the lower horizontal structure D is constructed, a scaffold (not shown) is placed at a position of about 50 cm from the lower surface of the lower flange G of the main girder B. And the worker performed the construction work on the scaffold. Scaffolds may be provided in two stages on the top and bottom as required. It is common to remove scaffolds that have been constructed.

足場の架設作業時や撤去作業時には、転落や落下による人身事故が生じる危険がある。下横構Ｄや対傾構Ｅの取付け作業時にも同様の危険がある。これら危険に対する安全対策のため、通常は、足場の下に先行ネット（図示しない）を張った上で前記作業を行っている。   There is a risk of personal injury due to falling or falling when the scaffold is erected or removed. There is a similar danger when the lower horizontal structure D and the tilting structure E are attached. As a safety measure against these dangers, the above work is usually performed with a preceding net (not shown) under the scaffold.

特開２０１３−７１７２号公報JP 2013-7172 A 特開２０１０−５３５２７号公報JP 2010-53527 A

しかし、先行ネットは落下した作業者を受けるものであり、落下自体を防止するものではないため、安全性という点で改善の余地がある。   However, since the preceding net receives the worker who has fallen and does not prevent the fall itself, there is room for improvement in terms of safety.

前記足場や先行ネットは、床版構築後に撤去するのが一般的である。しかし、足場は丸パイプを組んで構築し、先行ネットは鋼材（通常は鋼製ワイヤー）で支持されているため、足場先行ネットの撤去作業にも時間がかかり、作業性が悪く、鋼橋構築作業遅延の一因となっていた。   The scaffold and the preceding net are generally removed after the floor slab is constructed. However, because the scaffolding is constructed with round pipes and the preceding net is supported by steel (usually steel wire), it takes time to remove the scaffolding leading net, and the workability is poor, and the steel bridge is constructed. It contributed to the work delay.

本発明は、前記課題を解決すべく開発されたものであり、その目的は、従来使用していた先行ネットと足場を別々に設ける必要がなく、従来の足場よりも設置が容易で、人や物の落下に対する危険性が少なくなるため安全性が高く、作業性が良く、迅速な鋼橋構築が可能な鋼橋構造を提案することにある。   The present invention has been developed to solve the above-mentioned problems, and its purpose is not to separately provide a preceding net and a scaffold that have been conventionally used, and it is easier to install than conventional scaffolds. The object is to propose a steel bridge structure that has high safety, good workability, and enables rapid construction of a steel bridge because the risk of falling objects is reduced.

本発明の鋼橋構造は、主桁、横構を備えた鋼橋の構造であって、対向する主桁間に、作業者が載ることのできるパネル状の足場兼用横構が架設され、それら足場兼用横構は対向配置された主桁間に二以上配置され、それら二以上の足場兼用横構が前記主桁に固定されて架設された構造である。   The steel bridge structure of the present invention is a structure of a steel bridge having a main girder and a horizontal structure, and a panel-like scaffolding horizontal structure on which an operator can be placed is installed between the opposing main girders. Two or more scaffolding horizontal frames are arranged between the main beams arranged opposite to each other, and the two or more scaffolding horizontal frames are fixed to the main beam.

前記鋼橋構造では、足場兼用横構を主桁の下フランジの上に配置固定して架設することができる。   In the steel bridge structure, the horizontal structure for scaffolding can be arranged and fixed on the lower flange of the main girder.

本発明の鋼橋構造は、次の効果を有する。
（１）主桁間にパネル状の足場兼用横構が架設されているため、横荷重（主として水平力）が確実に負担され、安定する。
（２）足場兼用横構がパネル状であるため、落下や転落の危険が少なく、落下や転落を事前に予防できる。また、先行ネットを張る必要も撤去する必要もないので作業性が良い。
（３）足場兼用横構が主桁の下フランジに取り付けられているため、床版の下方の作業がし易い。 The steel bridge structure of the present invention has the following effects.
(1) Since a panel-like scaffolding horizontal structure is installed between the main girders, a lateral load (mainly horizontal force) is reliably borne and stabilized.
(2) Since the horizontal structure for scaffolding has a panel shape, there is little risk of falling or falling, and the falling or falling can be prevented in advance. In addition, workability is good because there is no need to set up or remove the preceding net.
(3) Since the horizontal structure for scaffolding is attached to the lower flange of the main girder, it is easy to work under the floor slab.

足場兼用横構を用いた鋼橋の一例を示す斜視図。The perspective view which shows an example of the steel bridge using a scaffold combined horizontal structure. 本発明の鋼橋構造の一例を示すものであって、（ａ）は斜視図、（ｂ）は（ａ）の足場兼用横構部分の平面図、（ｃ）は（ａ）の足場兼用横構を主桁の下フランジの上に架設固定した状態の正面図。1 shows an example of a steel bridge structure according to the present invention, in which (a) is a perspective view, (b) is a plan view of a horizontal structure part for scaffolding in (a), and (c) is a horizontal function for scaffolding in (a). The front view of the state which erected and fixed the structure on the lower flange of the main girder. （ａ）は図２（ｃ）のＸ部分の詳細図、（ｂ）は足場兼用横構の他の固定例を示すもの。FIG. 2A is a detailed view of an X portion in FIG. 2C, and FIG. 2B shows another example of fixing a scaffolding horizontal structure. 従来の鋼橋の一例を示す斜視図。The perspective view which shows an example of the conventional steel bridge.

（実施形態）
本発明の鋼橋構造の一例を、図面を参照して説明する。図１に示す鋼橋は主桁ＢにＩ形鋼を用いた鋼鈑桁橋であって、橋軸方向に配置される橋脚Ａ上に、二以上の主桁Ｂが橋幅方向に間隔をあけて配置され、その主桁Ｂ上に床版Ｃが配置されたものであり、対向する主桁Ｂ間（図１の例では、Ｂ1とＢ2の間と、Ｂ2とＢ3の間）に、足場兼用横構１と対傾構Ｅとが配設されている。 (Embodiment)
An example of the steel bridge structure of the present invention will be described with reference to the drawings. The steel bridge shown in FIG. 1 is a steel girder bridge using I-shaped steel for the main girder B, and two or more main girders B are spaced apart in the bridge width direction on the pier A arranged in the bridge axis direction. The floor slab C is arranged on the main girder B, and between the opposing main girder B (between B 1 and B 2 and between B 2 and B 3 in the example of FIG. 1). ), A horizontal structure 1 serving as a scaffold and an anti-tilt structure E are disposed.

主桁Ｂ間（主桁Ｂ1とＢ2の間と、Ｂ2とＢ3の間の夫々）に配設する足場兼用横構１にはパネル状のものを使用することができ、例えば、既存のオープングレーチングや、長方形の枠材にエキスパンドメタルやパンチングメタル等が張られた足場板等を用いることができる。図１及び図２はオープングレーチングを用いた場合の例である。 A panel-shaped one can be used as the scaffolding horizontal structure 1 disposed between the main beams B (between the main beams B 1 and B 2 and between B 2 and B 3 ). An existing open grating or a scaffolding plate in which an expanded metal or a punching metal is stretched on a rectangular frame material can be used. 1 and 2 show an example in which open grating is used.

図１及び図２に示す足場兼用横構１は、複数本の金属縦材２と複数本の金属横材３とが格子状に組み合わされたオープングレーチングであり、その上面が、作業者が作業時に載る足場面４である。足場兼用横構１は、鉄製、ステンレス製、アルミニウム製、ＦＲＰ製といった各種材質製とすることができる。   1 and 2 is an open grating in which a plurality of metal vertical members 2 and a plurality of metal horizontal members 3 are combined in a lattice shape, and the upper surface is used by an operator. It is foot scene 4 that sometimes appears. The scaffolding horizontal structure 1 can be made of various materials such as iron, stainless steel, aluminum, and FRP.

オープングレーチングを使用する場合は、その外周縁部に孔５の開いている板６を溶接や他の手段で取り付け、載置固定部７（図３（ａ）（ｂ））を設けておくのが良い。この場合は、載置固定部７を主桁Ｂの下フランジＧの上に載せ、載置固定部７の下フランジＧから上方に向けて植立されているボルト８（図２（ｃ）及び図３（ａ））を前記孔５に差し込み、そのボルト８にナット９を締め付けることにより載置固定部７を下フランジＧに固定して、オープングレーチングを下フランジＧに固定することができる。ボルト８は図３（ａ）のように、下フランジＧの上面にねじ切りをして固定しても良いし、下フランジＧにスタッド溶接にて固定しても良い。また図３（ｂ）のように、あらかじめ下フランジＧに孔を開け、そこへ下からボルト８を差し込み、下フランジＧ上面でナット９によりいったん固定し、そのボルト８の上部を使用して大きめのワッシャー１０とナット９にて固定しても良い。   When using the open grating, a plate 6 having holes 5 is attached to the outer peripheral edge thereof by welding or other means, and a mounting fixing portion 7 (FIGS. 3A and 3B) is provided. Is good. In this case, the mounting fixing part 7 is placed on the lower flange G of the main beam B, and the bolts 8 (FIG. 2 (c) and FIG. 3 (a)) is inserted into the hole 5 and a nut 9 is fastened to the bolt 8 to fix the mounting fixing portion 7 to the lower flange G, so that the open grating can be fixed to the lower flange G. As shown in FIG. 3A, the bolt 8 may be fixed by threading on the upper surface of the lower flange G, or may be fixed to the lower flange G by stud welding. Also, as shown in FIG. 3 (b), a hole is made in the lower flange G in advance, and a bolt 8 is inserted into the lower flange G from the bottom. The washer 10 and the nut 9 may be used for fixing.

足場兼用横構１に足場板や他の構造のパネルを使用する場合も、それらに載置固定部７を設けておくのが良い。この場合も載置固定部７を下フランジＧ上に載置し、下フランジＧに植立されているボルト８を利用してナット９により固定することができる。   Even when a scaffolding plate or a panel having another structure is used for the horizontal structure 1 serving as a scaffold, it is preferable to provide the mounting fixing portion 7 on the scaffolding plate or other structural panel. Also in this case, the mounting fixing portion 7 can be mounted on the lower flange G and fixed by the nut 9 using the bolt 8 planted on the lower flange G.

載置固定部７の構造は前記以外の構造であってもよく、載置固定部７の固定方法も前記以外の方法であっても良い。載置固定部７の構造、固定手段がどのようなものであっても、足場兼用横構１は着脱できるように固定する。   The structure of the mounting fixing part 7 may be a structure other than the above, and the fixing method of the mounting fixing part 7 may be a method other than the above. Regardless of the structure and fixing means of the mounting fixing portion 7, the scaffolding horizontal structure 1 is fixed so as to be detachable.

足場兼用横構１は図２（ａ）〜（ｃ）及び図３（ａ）（ｂ）に示すように、主桁ＢのウェブＨとの間にできるだけ隙間が生じないように載置固定して、足場兼用横構１の上に載った作業者が足を踏み外したり物を落としたりしないようにするのが良い。   As shown in FIGS. 2 (a) to 2 (c) and FIGS. 3 (a) and 3 (b), the scaffold / horizontal structure 1 is placed and fixed so that there is as little gap as possible between the web H of the main beam B. Thus, it is preferable that an operator who is on the scaffolding horizontal structure 1 does not step on or drop an object.

本発明の鋼橋構造は、道路橋や鉄道橋に利用することができる。特に、撤去を前提とする仮橋の架設に利用するのに好適である。   The steel bridge structure of the present invention can be used for road bridges and railway bridges. In particular, it is suitable for use in the construction of a temporary bridge premised on removal.

１ 足場兼用横構
２ 金属縦材
３ 金属横材
４ 足場面
５ 孔
６ 板
７ 載置固定部
８ ボルト
９ ナット
１０ ワッシャー
Ａ 橋脚
Ｂ、Ｂ1〜Ｂ3 主桁
Ｃ 床版
Ｄ 横構（下横構）
Ｅ 対傾構
Ｆ 上フランジ
Ｇ 下フランジ
Ｈ ウェブ 1 Scaffolding horizontal structure 2 Metal vertical material 3 Metal horizontal material 4 Foot scene 5 Hole 6 Plate 7 Placement fixing part 8 Bolt 9 Nut 10 Washer A Bridge pier B, B 1 to B 3 Main girder C Floor slab D Horizontal (Lower Horizontal)
E Anti-tilt F Upper flange G Lower flange H Web

本発明は、鋼鈑桁橋（鋼橋）構造に関し、特に、主桁間に横構を備えた鋼橋の構造（以下「鋼橋構造」という）に関する。   The present invention relates to a steel bridge girder bridge (steel bridge) structure, and more particularly to a steel bridge structure (hereinafter referred to as “steel bridge structure”) having a horizontal structure between main girders.

鋼橋の一つとして主桁にＩ形鋼を用いた鋼鈑桁橋が知られている。一般的な鋼鈑桁橋の一例を図４に示す。この鋼鈑桁橋は、橋脚Ａ上に複数の主桁Ｂが橋幅方向に間隔をあけて配置され、その主桁Ｂ上に床版Ｃが配置されている。主桁Ｂ間（図４の例では、Ｂ1とＢ2の間、Ｂ2とＢ3の間）に、横荷重（主として水平力）を負担する下横構Ｄや、横荷重に加えて鉛直荷重を負担する対傾構Ｅが配設されている。鋼鈑桁橋は、図４に示すもの以外にも広く知られており、例えば、特許文献１、２のものがある。 As one of steel bridges, a steel bridge girder bridge using I-shaped steel as a main girder is known. An example of a general steel girder bridge is shown in FIG. In this steel girder bridge, a plurality of main girders B are arranged on the pier A at intervals in the bridge width direction, and a floor slab C is arranged on the main girder B. In addition to the main frame B (in the example of FIG. 4, between B 1 and B 2 and between B 2 and B 3 ), the lower horizontal structure D that bears the lateral load (mainly horizontal force) and the lateral load An anti-tilt structure E that bears a vertical load is disposed. Steel girder bridges are widely known in addition to those shown in FIG.

従来、主桁Ｂの上フランジＦに床版Ｃを構築したり、下横構Ｄを構築したりする際は、主桁Ｂの下フランジＧの下面から５０ｃｍ程度の位置に足場（図示しない）を配置し、作業員が当該足場に載って前記構築作業を行っていた。足場は必要に応じて、上下に二段設けることもある。架設した足場は撤去するのが一般的である。   Conventionally, when the floor slab C is constructed on the upper flange F of the main girder B or the lower horizontal structure D is constructed, a scaffold (not shown) is placed at a position of about 50 cm from the lower surface of the lower flange G of the main girder B. And the worker performed the construction work on the scaffold. Scaffolds may be provided in two stages on the top and bottom as required. It is common to remove scaffolds that have been constructed.

足場の架設作業時や撤去作業時には、転落や落下による人身事故が生じる危険がある。下横構Ｄや対傾構Ｅの取付け作業時にも同様の危険がある。これら危険に対する安全対策のため、通常は、足場の下に先行ネット（図示しない）を張った上で前記作業を行っている。   There is a risk of personal injury due to falling or falling when the scaffold is erected or removed. There is a similar danger when the lower horizontal structure D and the tilting structure E are attached. As a safety measure against these dangers, the above work is usually performed with a preceding net (not shown) under the scaffold.

特開２０１３−７１７２号公報JP 2013-7172 A 特開２０１０−５３５２７号公報JP 2010-53527 A

しかし、先行ネットは落下した作業者を受けるものであり、落下自体を防止するものではないため、安全性という点で改善の余地がある。   However, since the preceding net receives the worker who has fallen and does not prevent the fall itself, there is room for improvement in terms of safety.

前記足場や先行ネットは、床版構築後に撤去するのが一般的である。しかし、足場は丸パイプを組んで構築し、先行ネットは鋼材（通常は鋼製ワイヤー）で支持されているため、足場先行ネットの撤去作業にも時間がかかり、作業性が悪く、鋼橋構築作業遅延の一因となっていた。   The scaffold and the preceding net are generally removed after the floor slab is constructed. However, because the scaffolding is constructed with round pipes and the preceding net is supported by steel (usually steel wire), it takes time to remove the scaffolding leading net, and the workability is poor, and the steel bridge is constructed. It contributed to the work delay.

本発明は、前記課題を解決すべく開発されたものであり、その目的は、従来使用していた先行ネットと足場を別々に設ける必要がなく、従来の足場よりも設置が容易で、人や物の落下に対する危険性が少なくなるため安全性が高く、作業性が良く、迅速な鋼橋構築が可能な鋼橋構造を提案することにある。   The present invention has been developed to solve the above-mentioned problems, and its purpose is not to separately provide a preceding net and a scaffold that have been conventionally used, and it is easier to install than conventional scaffolds. The object is to propose a steel bridge structure that has high safety, good workability, and enables rapid construction of a steel bridge because the risk of falling objects is reduced.

本発明の鋼橋構造は、主桁、横構を備えた鋼橋構造において、対向する主桁間に作業者が載ることのできる足場と横荷重を負担できる横構とを兼用にした足場兼用横構が架設され、前記足場兼用横構はパネル状であり、前記足場兼用横構は対向配置された主桁間に二以上配置され、前記二以上の足場兼用横構が前記主桁に固定されて架設された構造である。 Steel bridge structure of the present invention, the main girder, in steel bridges structure with horizontal structure, and a transverse structure which can bear a scaffold and lateral loads that can that the operator between opposing main girder rests combined scaffold A combined horizontal structure is constructed, the scaffold combined horizontal structure is in a panel shape, the scaffold combined horizontal structure is arranged between two or more main beams opposed to each other, and the two or more scaffold combined horizontal frames are arranged in the main beam. It is a fixed and erected structure.

前記鋼橋構造では、足場兼用横構を主桁の下フランジの上に配置固定して架設することができる。   In the steel bridge structure, the horizontal structure for scaffolding can be arranged and fixed on the lower flange of the main girder.

本発明の鋼橋構造は、次の効果を有する。
（１）主桁間にパネル状の足場兼用横構が架設されているため、横荷重（主として水平力）が確実に負担され、安定する。
（２）足場兼用横構がパネル状であるため、落下や転落の危険が少なく、落下や転落を事前に予防できる。また、先行ネットを張る必要も撤去する必要もないので作業性が良い。
（３）足場兼用横構が主桁の下フランジに取り付けられているため、床版の下方の作業がし易い。 The steel bridge structure of the present invention has the following effects.
(1) Since a panel-like scaffolding horizontal structure is installed between the main girders, a lateral load (mainly horizontal force) is reliably borne and stabilized.
(2) Since the horizontal structure for scaffolding has a panel shape, there is little risk of falling or falling, and the falling or falling can be prevented in advance. In addition, workability is good because there is no need to set up or remove the preceding net.
(3) Since the horizontal structure for scaffolding is attached to the lower flange of the main girder, it is easy to work under the floor slab.

足場兼用横構を用いた鋼橋の一例を示す斜視図。The perspective view which shows an example of the steel bridge using a scaffold combined horizontal structure. 本発明の鋼橋構造の一例を示すものであって、（ａ）は斜視図、（ｂ）は（ａ）の足場兼用横構部分の平面図、（ｃ）は（ａ）の足場兼用横構を主桁の下フランジの上に架設固定した状態の正面図。1 shows an example of a steel bridge structure according to the present invention, in which (a) is a perspective view, (b) is a plan view of a horizontal structure part for scaffolding in (a), and (c) is a horizontal function for scaffolding in (a). The front view of the state which erected and fixed the structure on the lower flange of the main girder. （ａ）は図２（ｃ）のＸ部分の詳細図、（ｂ）は足場兼用横構の他の固定例を示すもの。FIG. 2A is a detailed view of an X portion in FIG. 2C, and FIG. 2B shows another example of fixing a scaffolding horizontal structure. 従来の鋼橋の一例を示す斜視図。The perspective view which shows an example of the conventional steel bridge.

（実施形態）
本発明の鋼橋構造の一例を、図面を参照して説明する。図１に示す鋼橋は主桁ＢにＩ形鋼を用いた鋼鈑桁橋であって、橋軸方向に配置される橋脚Ａ上に、二以上の主桁Ｂが橋幅方向に間隔をあけて配置され、その主桁Ｂ上に床版Ｃが配置されたものであり、対向する主桁Ｂ間（図１の例では、Ｂ1とＢ2の間と、Ｂ2とＢ3の間）に、足場兼用横構１と対傾構Ｅとが配設されている。 (Embodiment)
An example of the steel bridge structure of the present invention will be described with reference to the drawings. The steel bridge shown in FIG. 1 is a steel girder bridge using I-shaped steel for the main girder B, and two or more main girders B are spaced apart in the bridge width direction on the pier A arranged in the bridge axis direction. The floor slab C is arranged on the main girder B, and between the opposing main girder B (between B 1 and B 2 and between B 2 and B 3 in the example of FIG. 1). ), A horizontal structure 1 serving as a scaffold and an anti-tilt structure E are disposed.

主桁Ｂ間（主桁Ｂ1とＢ2の間と、Ｂ2とＢ3の間の夫々）に配設する足場兼用横構１にはパネル状のものを使用することができ、例えば、既存のオープングレーチングや、長方形の枠材にエキスパンドメタルやパンチングメタル等が張られた足場板等を用いることができる。図１及び図２はオープングレーチングを用いた場合の例である。 A panel-shaped one can be used as the scaffolding horizontal structure 1 disposed between the main beams B (between the main beams B 1 and B 2 and between B 2 and B 3 ). An existing open grating or a scaffolding plate in which an expanded metal or a punching metal is stretched on a rectangular frame material can be used. 1 and 2 show an example in which open grating is used.

図１及び図２に示す足場兼用横構１は、複数本の金属縦材２と複数本の金属横材３とが格子状に組み合わされたオープングレーチングであり、その上面が、作業者が作業時に載る足場面４である。足場兼用横構１は、鉄製、ステンレス製、アルミニウム製、ＦＲＰ製といった各種材質製とすることができる。   1 and 2 is an open grating in which a plurality of metal vertical members 2 and a plurality of metal horizontal members 3 are combined in a lattice shape, and the upper surface is used by an operator. It is foot scene 4 that sometimes appears. The scaffolding horizontal structure 1 can be made of various materials such as iron, stainless steel, aluminum, and FRP.

オープングレーチングを使用する場合は、その外周縁部に孔５の開いている板６を溶接や他の手段で取り付け、載置固定部７（図３（ａ）（ｂ））を設けておくのが良い。この場合は、載置固定部７を主桁Ｂの下フランジＧの上に載せ、載置固定部７の下フランジＧから上方に向けて植立されているボルト８（図２（ｃ）及び図３（ａ））を前記孔５に差し込み、そのボルト８にナット９を締め付けることにより載置固定部７を下フランジＧに固定して、オープングレーチングを下フランジＧに固定することができる。ボルト８は図３（ａ）のように、下フランジＧの上面にねじ切りをして固定しても良いし、下フランジＧにスタッド溶接にて固定しても良い。また図３（ｂ）のように、あらかじめ下フランジＧに孔を開け、そこへ下からボルト８を差し込み、下フランジＧ上面でナット９によりいったん固定し、そのボルト８の上部を使用して大きめのワッシャー１０とナット９にて固定しても良い。   When using the open grating, a plate 6 having holes 5 is attached to the outer peripheral edge thereof by welding or other means, and a mounting fixing portion 7 (FIGS. 3A and 3B) is provided. Is good. In this case, the mounting fixing part 7 is placed on the lower flange G of the main beam B, and the bolts 8 (FIG. 2 (c) and FIG. 3 (a)) is inserted into the hole 5 and a nut 9 is fastened to the bolt 8 to fix the mounting fixing portion 7 to the lower flange G, so that the open grating can be fixed to the lower flange G. As shown in FIG. 3A, the bolt 8 may be fixed by threading on the upper surface of the lower flange G, or may be fixed to the lower flange G by stud welding. Also, as shown in FIG. 3 (b), a hole is made in the lower flange G in advance, and a bolt 8 is inserted into the lower flange G from the bottom. The washer 10 and the nut 9 may be used for fixing.

足場兼用横構１に足場板や他の構造のパネルを使用する場合も、それらに載置固定部７を設けておくのが良い。この場合も載置固定部７を下フランジＧ上に載置し、下フランジＧに植立されているボルト８を利用してナット９により固定することができる。   Even when a scaffolding plate or a panel having another structure is used for the horizontal structure 1 serving as a scaffold, it is preferable to provide the mounting fixing portion 7 on the scaffolding plate or other structural panel. Also in this case, the mounting fixing portion 7 can be mounted on the lower flange G and fixed by the nut 9 using the bolt 8 planted on the lower flange G.

載置固定部７の構造は前記以外の構造であってもよく、載置固定部７の固定方法も前記以外の方法であっても良い。載置固定部７の構造、固定手段がどのようなものであっても、足場兼用横構１は着脱できるように固定する。   The structure of the mounting fixing part 7 may be a structure other than the above, and the fixing method of the mounting fixing part 7 may be a method other than the above. Regardless of the structure and fixing means of the mounting fixing portion 7, the scaffolding horizontal structure 1 is fixed so as to be detachable.

足場兼用横構１は図２（ａ）〜（ｃ）及び図３（ａ）（ｂ）に示すように、主桁ＢのウェブＨとの間にできるだけ隙間が生じないように載置固定して、足場兼用横構１の上に載った作業者が足を踏み外したり物を落としたりしないようにするのが良い。   As shown in FIGS. 2 (a) to 2 (c) and FIGS. 3 (a) and 3 (b), the scaffold / horizontal structure 1 is placed and fixed so that there is as little gap as possible between the web H of the main beam B. Thus, it is preferable that an operator who is on the scaffolding horizontal structure 1 does not step on or drop an object.

本発明の鋼橋構造は、道路橋や鉄道橋に利用することができる。特に、撤去を前提とする仮橋の架設に利用するのに好適である。   The steel bridge structure of the present invention can be used for road bridges and railway bridges. In particular, it is suitable for use in the construction of a temporary bridge premised on removal.

１ 足場兼用横構
２ 金属縦材
３ 金属横材
４ 足場面
５ 孔
６ 板
７ 載置固定部
８ ボルト
９ ナット
１０ ワッシャー
Ａ 橋脚
Ｂ、Ｂ1〜Ｂ3 主桁
Ｃ 床版
Ｄ 横構（下横構）
Ｅ 対傾構
Ｆ 上フランジ
Ｇ 下フランジ
Ｈ ウェブ 1 Scaffolding horizontal structure 2 Metal vertical material 3 Metal horizontal material 4 Foot scene 5 Hole 6 Plate 7 Placement fixing part 8 Bolt 9 Nut 10 Washer A Bridge pier B, B 1 to B 3 Main girder C Floor slab D Horizontal (Lower Horizontal)
E Anti-tilt F Upper flange G Lower flange H Web

Claims (2)

主桁、横構を備えた鋼橋の構造において、
対向する主桁間に、作業者が載ることのできるパネル状の足場兼用横構が架設され、
前記足場兼用横構は対向配置された主桁間に二以上配置され、
前記二以上の足場兼用横構が前記主桁に固定されて架設された、
ことを特徴とする鋼橋構造。 In the structure of steel bridge with main girder and horizontal structure,
Between the opposing main girders, a panel-like scaffolding horizontal structure on which an operator can rest is installed.
Two or more of the scaffold combined horizontal structures are arranged between the main beams arranged opposite to each other,
The two or more scaffolding horizontal structures are fixed to the main girder and constructed.
Steel bridge structure characterized by that. 請求項１記載の鋼橋構造において、
足場兼用横構が、主桁の下フランジの上に配置固定して架設された、
ことを特徴とする鋼橋構造。 In the steel bridge structure according to claim 1,
Scaffolding horizontal structure was placed and fixed on the lower flange of the main girder,
Steel bridge structure characterized by that.
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