JP2012202076A - Construction device of overhead viaduct and construction method of overhead viaduct - Google Patents
Construction device of overhead viaduct and construction method of overhead viaduct Download PDFInfo
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本発明は、直上高架橋の施工装置及び直上高架橋の施工方法に関し、特に、直上高架橋の高さの変化や断面変化に容易に対応可能な直上高架橋の施工装置及び直上高架橋の施工方法に関する。 The present invention relates to a construction apparatus for a direct overhead viaduct and a construction method for a direct overhead viaduct, and in particular, relates to a construction apparatus for a direct overhead viaduct and a construction method for a direct overhead viaduct that can easily cope with a change in the height of the overhead bridge and a change in cross section.
この直上高架橋の施工装置は、杭構築等の下部工を行う基礎工用施工装置と、基礎工上に高架橋等の上部工を行う部材架設用施工装置とを有し、各施工装置は、先行して構築される杭または杭打設用の下地工に移動可能に支持された下部ガーダーと、前記下部ガーダーに対して移動可能にされた上部ガーダーとを有したものとされている。 This directly elevated viaduct construction equipment has a foundation construction equipment that performs substructure such as pile construction and a member construction construction apparatus that performs superstructure such as a viaduct on the foundation work. And a lower girder supported so as to be movable by a pile or a foundation work for placing the pile, and an upper girder movable relative to the lower girder.
また、部材架設用施工装置は、下部ガーダー上で上部ガーダーの前方部を移動可能に支持する前方移動装置と、上部ガーダーの後方部を構築された直上高架橋上で移動可能に支持する後方移動装置とを有するものとされている。 Moreover, the construction apparatus for member construction includes a front moving device that supports the front portion of the upper girder so as to be movable on the lower girder, and a rear moving device that supports the rear portion of the upper girder so as to be movable on the directly elevated viaduct. It is supposed to have.
このように、架設ガーダー方式による汎用部材の使用を主体とすることで、低コストで工期短縮を実現することができるものとなっている。 Thus, the construction period can be shortened at low cost by mainly using the general-purpose member by the construction girder method.
このような直上高架橋の施工装置にあっては、前方移動装置の高さや幅を可変にしたり、レールとローラとの間にクリアランスを持たせたりすることで、ある程度の直上高架橋の高さの変化や断面変化に対応できるようにしているが、直上高架橋の大幅な高さの変化や急激な断面変化に対応できず、さらなる改良が望まれていた。 In such a directly elevated viaduct construction equipment, the height and width of the forward moving device can be varied, or a clearance is provided between the rail and the roller, so that the height of the directly elevated viaduct can be changed to some extent. However, it cannot cope with a significant change in the height of the directly elevated viaduct or a sudden change in cross section, and further improvement has been desired.
本発明の目的は、急激な断面変化に確実に対応することができる直上高架橋の施工装置及び直上高架橋の施工方法を提供することにある。 An object of the present invention is to provide a construction apparatus for a directly overpass and a construction method for a directly overpass that can reliably cope with a sudden change in cross section.
また、直上高架橋の大幅な高さの変化に確実に対応することができる直上高架橋の施工装置及び直上高架橋の施工方法を提供することにある。 It is another object of the present invention to provide a construction apparatus for a direct overhead viaduct and a construction method for the direct overhead viaduct that can reliably cope with a significant change in the height of the overhead bridge.
前記目的を達成するため、本発明の直上高架橋の施工装置は、杭構築等の下部工を行う基礎工用施工装置と、基礎工上に高架橋等の上部工を行う部材架設用施工装置とを有し、
前記各施工装置は、先行して構築される杭または杭打設用の下地工に移動可能に支持された下部ガーダーと、前記下部ガーダーに対して移動可能にされた上部ガーダーとを有し、
前記部材架設用施工装置は、前記下部ガーダー上で前記上部ガーダーの前方部を移動可能に支持する前方移動装置と、前記上部ガーダーの後方部を構築された直上高架橋上で移動可能に支持する後方移動装置とを有する直上高架橋の施工装置であって、
前記前方移動装置は、進行方向の両側部に位置する一対の脚部と、これら脚部を上部位置で連結する上部連結部とを有する門型状とされ、
前記上部連結部は、前記一対の脚部を水平方向で回転可能に支持する回転支持機構と、上部連結部の幅を拡縮することで前記一対の脚部の間隔を拡縮する拡縮機構とを有することを特徴とする。
In order to achieve the above object, the construction apparatus for the directly elevated viaduct of the present invention includes a construction apparatus for foundation work that performs substructure work such as pile construction and a construction apparatus for member construction that performs superstructure work such as viaduct on the foundation work. Have
Each construction device has a lower girder supported movably on a pile constructed in advance or a foundation for pile driving, and an upper girder made movable with respect to the lower girder,
The construction apparatus for member erection includes a forward moving device that supports the front part of the upper girder so as to be movable on the lower girder, and a rear side that supports the rear part of the upper girder so as to be movable on a directly elevated viaduct. It is a construction device for the directly elevated viaduct having a moving device,
The forward movement device has a gate shape having a pair of leg portions located on both sides in the traveling direction, and an upper connecting portion that connects the leg portions at an upper position,
The upper coupling portion includes a rotation support mechanism that supports the pair of leg portions so as to be rotatable in a horizontal direction, and an expansion / contraction mechanism that expands / contracts the interval between the pair of leg portions by expanding / contracting the width of the upper coupling portion. It is characterized by that.
本発明によれば、架設ガーダー方式による汎用部材の使用を主体とすることで、低コストで工期短縮を実現することができる。 According to the present invention, the construction period can be shortened at low cost by mainly using the general-purpose member by the construction girder method.
また、上部連結部に設けた回転支持機構により一対の脚部を水平方向で回転可能に支持することで、前方移動装置の移動の際における下部ガーダーの大幅な断面変化に確実に対応することができる。 In addition, by supporting the pair of legs rotatably in the horizontal direction by the rotation support mechanism provided in the upper connecting portion, it is possible to reliably cope with a large cross-sectional change of the lower girder during the movement of the forward moving device. it can.
さらに、上部連結部に設けた拡縮機構により上部連結部の幅を拡縮することで前記一対の脚部の間隔を拡縮することができ、これによって、回転支持機構と相まって、前方移動装置の移動の際における下部ガーダーの大幅な断面変化に確実に対応することができる。 Further, the distance between the pair of leg portions can be increased or decreased by expanding or reducing the width of the upper connecting portion by the expansion / contraction mechanism provided in the upper connecting portion. It is possible to reliably cope with a large cross-sectional change of the lower girder.
本発明においては、前記一対の脚部は、上下スライド機構を有し、
前記上下スライド機構は、前記一対の脚部が上下方向で分割形成され、かつ、上下方向で伸縮可能に接合された上部脚部及び下部脚部と、前記上部脚部及び下部脚部の対応位置に長さ方向に沿って所定間隔で設けられた複数の連結孔と、前記上部脚部及び下部脚部の一方に設けられ、他方が前記連結孔に対して脱着可能にされた伸縮ジャッキと、所定の伸縮位置で前記上部脚部及び下部脚部の対応位置の連結孔に装着可能にされた連結ピンとを有するものとすることができる。
In the present invention, the pair of legs has a vertical slide mechanism,
The upper and lower slide mechanism has an upper leg portion and a lower leg portion in which the pair of leg portions are divided in the vertical direction and joined to be extendable in the vertical direction, and corresponding positions of the upper leg portion and the lower leg portion. A plurality of connecting holes provided at predetermined intervals along the length direction, and an extension jack provided in one of the upper leg portion and the lower leg portion, the other being detachable from the connecting hole, A connecting pin that can be attached to a connecting hole at a corresponding position of the upper leg portion and the lower leg portion at a predetermined expansion / contraction position.
このような構成とすることにより、伸縮ジャッキを盛替えることで、脚部を複数段の高さ位置に位置決めすることができ、その結果、直上高架橋の大幅な高さの変化に確実に対応することができる。 By adopting such a configuration, it is possible to position the leg portions at a plurality of height positions by changing the extension jack, and as a result, it is possible to reliably cope with a significant change in the height of the directly elevated viaduct. be able to.
本発明においては、前記基礎工用施工装置は、下部ガーダーの上方に下部ガーダーに沿って支持された移動装置付き脚を有し、この移動装置付き脚は、回転機構により水平方向で回転可能にされ、かつ、拡縮機構により幅方向で拡縮可能にされたものとすることができる。 In the present invention, the construction apparatus for foundation work has a leg with a moving device supported along the lower girder above the lower girder, and the leg with the moving device can be rotated in a horizontal direction by a rotating mechanism. In addition, it can be expanded and contracted in the width direction by the expansion and contraction mechanism.
このような構成とすることにより、基礎工用施工装置においても、回転機構及び拡縮機構によって、移動の際における下部ガーダーの大幅な断面変化に確実に対応することができる。 By setting it as such a structure, also in the construction apparatus for foundation works, it can respond | correspond reliably to the big cross-sectional change of the lower girder in the case of a movement by a rotation mechanism and an expansion / contraction mechanism.
本発明の直上高架橋の施工方法は、杭構築等の下部工を行う基礎工用施工装置と、基礎工上に高架橋等の上部工を行う部材架設用施工装置とを用い、前記基礎工用施工装置にて、上部工に先行して杭または杭打設用の下地工を施工する工程と、前記先行構築された杭または杭打設用の下地工に前記基礎工用施工装置の下部ガーダーを移動可能に支持させ、この下部ガーダーに対して前記基礎工用施工装置の上部ガーダーを移動可能に支持させる工程と、前記杭または杭打設用の下地工に前記部材架設用施工装置の下部ガーダーを移動可能に支持させ、構築された直上高架橋上で上部ガーダーを移動可能に支持させる工程と、前記基礎工用施工装置の移動に伴い基礎工用施工装置により構築された杭上に前記部材架設用施工装置にて順次直上高架橋を構築する工程とを含む直上高架橋の施工方法であって、
前記部材架設用施工装置は、前記下部ガーダー上で前記上部ガーダーの前方部を移動可能に支持する前方移動装置と、前記上部ガーダーの後方部を構築された直上高架橋上で移動可能に支持する後方移動装置とを有し、前記前方移動装置は、進行方向の両側部に位置する一対の脚部と、これら脚部を上部位置で連結する上部連結部とを有する門型状とされ、
前方移動装置が下部ガーダー上を移動する際に、下部ガーダーの断面方向の角度変化が生じた場合に、前記上部連結部に設けた前記一対の脚部を水平方向で回転可能に支持する回転支持機構により、前記一対の脚部を回転させて下部ガーダーの断面方向の角度変化に対応させる工程と、
前方移動装置が下部ガーダー上を移動する際に、下部ガーダーの断面方向の角度に急激な変化が生じた場合に、前記上部連結部に設けた上部連結部の幅を拡縮する拡縮機構により、前記一対の脚部の間隔を拡縮することで前記回転支持機構による脚部の回転と相まって前記下部ガーダーの断面方向の急激な角度変化に対応する工程と、
新設の直上高架橋の高さに変化が生じた場合に、前記一対の脚部が上下方向で分割形成され、かつ、上下方向で伸縮可能に接合された上部脚部及び下部脚部と、前記上部脚部及び下部脚部の対応位置に長さ方向に沿って所定間隔で設けられた複数の連結孔と、前記上部脚部及び下部脚部の一方に設けられ、他方が前記連結孔に対して脱着可能にされた伸縮ジャッキと、所定の伸縮位置で前記上部脚部及び下部脚部の対応位置の連結孔に装着可能にされた連結ピンとを有する上下スライド機構を用い、前記伸縮ジャッキにより上下部脚部の長さを調節して連結ピンを上下部脚部に形成した対応位置の位置決め穴に挿入して脚部の高さを調整し、さらに調整を必要とする場合には、伸縮ジャッキを順次盛替えることにより必要な高さまで脚部の高さを調整する工程と、
を含むことを特徴とする。
The construction method of the directly elevated viaduct according to the present invention uses a construction apparatus for foundation work that performs substructure work such as pile construction and a construction apparatus for member construction that performs superstructure work such as viaduct on the foundation work. In the equipment, the process of constructing the pile or the foundation for pile driving prior to the superstructure, and the lower girder of the foundation construction equipment for the pile or the foundation for pile placing constructed in advance A step of supporting the lower girder so that the upper girder of the construction apparatus for foundation work is movably supported on the lower girder, and a lower girder of the construction apparatus for erection of the member on the pile or the foundation work for driving the pile The upper girder is movably supported on the built-up viaduct, and the member is installed on the pile constructed by the foundation construction device as the foundation construction device moves. In the construction equipment A construction method of directly viaduct and a step of constructing a bridge,
The construction apparatus for member erection includes a forward moving device that supports the front part of the upper girder so as to be movable on the lower girder, and a rear side that supports the rear part of the upper girder so as to be movable on a directly elevated viaduct. The forward movement device has a gate shape having a pair of leg portions located on both sides in the traveling direction, and an upper connection portion for connecting these leg portions at an upper position,
When the forward moving device moves on the lower girder, if the angle change in the cross-sectional direction of the lower girder occurs, the rotation support that supports the pair of legs provided on the upper connecting portion so as to be rotatable in the horizontal direction. A step of rotating the pair of legs by a mechanism to correspond to an angle change in a cross-sectional direction of the lower girder;
When the forward moving device moves on the lower girder, when an abrupt change occurs in the angle in the cross-sectional direction of the lower girder, by the expansion / contraction mechanism that expands / contracts the width of the upper connection portion provided in the upper connection portion, Corresponding to a sudden angle change in the cross-sectional direction of the lower girder in combination with the rotation of the legs by the rotation support mechanism by expanding and contracting the distance between the pair of legs,
When there is a change in the height of the newly installed overhead viaduct, the pair of legs are divided in the vertical direction, and the upper and lower legs are joined so as to be stretchable in the vertical direction, and the upper part A plurality of connecting holes provided at predetermined intervals along the length direction at corresponding positions of the leg portion and the lower leg portion, and provided in one of the upper leg portion and the lower leg portion, and the other to the connecting hole Using an up / down slide mechanism having a telescopic jack made detachable and a connecting pin made attachable to a connecting hole at a corresponding position of the upper leg portion and the lower leg portion at a predetermined telescopic position. Adjust the length of the leg and insert the connecting pin into the corresponding positioning hole formed on the upper and lower legs to adjust the height of the leg. The height of the legs is reduced to the required height by re-sequencing And the step of adjusting the,
It is characterized by including.
本発明によれば、基礎工用施工装置及び部材架設用施工装置は、それぞれ下部ガーダー及び上部ガーダーを有する架設ガーダー方式による汎用部材の使用を主体としたもので、専用の装置と異なり低コストとすることができ、しかも、各施工装置は先行して構築される杭または杭打設用の下地工に支持させることで、荷重支持のための全面的な地盤改良や整地作業、横断する地下埋設物などの防護工等の必要もないため、大幅なコスト低減と工期短縮を実現することができる。 According to the present invention, the construction apparatus for foundation work and the construction apparatus for member construction are mainly used for general-purpose members by the construction girder system having the lower girder and the upper girder, respectively. In addition, each construction device is supported by a pile constructed in advance or a groundwork for pile driving, so that the entire ground improvement and leveling work for load support can be carried out, Since there is no need for protective work, etc., it is possible to achieve a significant cost reduction and shortening the construction period.
また、基礎工用施工装置で先行構築した杭または杭打設用の下地工に下部ガーダーを支持させ、杭が構築された状態で後続の部材架設用施工装置により直上高架橋を構築することができ、一連の施工作業を効率よく行うことができる。 In addition, the lower girder can be supported by the pile constructed in advance by the construction equipment for foundation work or the groundwork for pile driving, and the directly elevated viaduct can be constructed by the construction equipment for the subsequent member construction with the pile constructed. A series of construction work can be performed efficiently.
さらに、上部連結部に設けた回転支持機構により一対の脚部を水平方向で回転可能に支持することで、前方移動装置の移動の際における下部ガーダーの大幅な断面変化に確実に対応することができる。 Furthermore, by supporting the pair of legs rotatably in the horizontal direction by the rotation support mechanism provided in the upper connecting part, it is possible to reliably cope with a large cross-sectional change of the lower girder during the movement of the forward moving device. it can.
また、上部連結部に設けた拡縮機構により上部連結部の幅を拡縮することで前記一対の脚部の間隔を拡縮することができ、これによって、回転支持機構と相まって、前方移動装置の移動の際における下部ガーダーの大幅な断面変化に確実に対応することができる。 In addition, the distance between the pair of leg portions can be increased or decreased by expanding or reducing the width of the upper connecting portion by the expansion / contraction mechanism provided in the upper connecting portion. It is possible to reliably cope with a large cross-sectional change of the lower girder.
そしてさらに、伸縮ジャッキを盛替えることで、脚部を複数段の高さ位置に位置決めすることができ、その結果、直上高架橋の大幅な高さの変化に確実に対応することができる。 Furthermore, by changing the extension jacks, the leg portions can be positioned at a plurality of height positions, and as a result, it is possible to reliably cope with a significant change in the height of the overhead bridge.
本発明においては、前記基礎工用施工装置は、下部ガーダーの上方に下部ガーダーに沿って支持された移動装置付き脚を有し、この移動装置付き脚は、回転機構により水平方向で回転可能にされ、かつ、拡縮機構により幅方向で拡縮可能にされ、
前記下部ガーダーに沿って前記移動装置付き脚が移動する際に、下部ガーダーの断面方向の角度変化が生じた場合に、前記移動装置付き脚部を回転機構により水平方向で回転させて下部ガーダーの断面方向の角度変化に対応させる工程と、
前記下部ガーダーに沿って前記移動装置付き脚が移動する際に、下部ガーダーの断面方向の角度に急激な変化が生じた場合に、前記拡縮機構により前記移動装置付き脚の幅を拡縮することで前記回転機構による移動装置付き脚の回転と相まって前記下部ガーダーの断面方向の急激な角度変化に対応する工程と、
を含むものとすることができる。
In the present invention, the construction apparatus for foundation work has a leg with a moving device supported along the lower girder above the lower girder, and the leg with the moving device can be rotated in a horizontal direction by a rotating mechanism. And can be enlarged / reduced in the width direction by the expansion / contraction mechanism,
When an angle change in the cross-sectional direction of the lower girder occurs when the leg with the moving device moves along the lower girder, the leg portion with the moving device is rotated in a horizontal direction by a rotating mechanism to A step of responding to the angle change in the cross-sectional direction;
When the leg with the moving device moves along the lower girder, when a sudden change occurs in the angle in the cross-sectional direction of the lower girder, the width of the leg with the moving device is expanded or reduced by the expansion / contraction mechanism. Corresponding to a sudden angle change in the cross-sectional direction of the lower girder in combination with the rotation of the leg with the moving device by the rotation mechanism;
Can be included.
このような構成とすることにより、回転機構により移動機構付き脚を水平方向で回転可能に支持することで、移動装置付き脚の移動の際における下部ガーダーの大幅な断面変化に確実に対応することができ,また、拡縮機構により移動装置付き脚の幅を拡縮することで、回転支持機構と相まって、移動装置付き脚の移動の際における下部ガーダーの大幅な断面変化に確実に対応することができる。 By adopting such a configuration, the leg with the moving mechanism is supported by the rotating mechanism so as to be able to rotate in the horizontal direction, so that it can reliably cope with a large cross-sectional change of the lower girder when the leg with the moving device is moved. In addition, by expanding and reducing the width of the leg with the moving device by the expansion and contraction mechanism, it is possible to reliably cope with a large cross-sectional change of the lower girder when the leg with the moving device is moved in combination with the rotation support mechanism. .
以下、本発明の実施の形態について、図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図１〜図１２は、本発明の一実施の形態にかかる直上高架橋の施工装置を示す図である。 FIGS. 1-12 is a figure which shows the construction apparatus of the directly overhead viaduct concerning one embodiment of this invention.
図１は、本実施の形態にかかる直上高架橋の施工装置を示す側面図で、この直上高架橋の施工装置１０は、既設の軌条１２の直上に高架橋１４を構築するもので、基礎工用施工装置１６と、部材架設用施工装置１８とを有している。 FIG. 1 is a side view showing a construction apparatus for a directly elevated viaduct according to the present embodiment. This construction apparatus for a directly elevated viaduct 10 constructs a viaduct 14 directly above an existing rail 12, and is a construction apparatus for foundation work. 16 and a member erection construction device 18.
各施工装置１６及び１８はそれぞれ下部ガーダー２０、２２及び上部ガーダー２４、２６を有している。 Each construction device 16 and 18 has lower girders 20 and 22 and upper girders 24 and 26, respectively.
基礎工用施工装置１６は、杭構築等の基礎工を行うもので、下部ガーダー２０と、上部ガーダー２４とは汎用部材で形成されている。 The foundation work construction device 16 performs foundation work such as pile construction, and the lower girder 20 and the upper girder 24 are formed of general-purpose members.
下部ガーダー２０は、先行して構築される杭２８または杭２８施工用の下地工であるスタンドパイプ３０に移動可能に支持されるようになっている。 The lower girder 20 is movably supported by a pile 28 that is constructed in advance or a stand pipe 30 that is a foundation for constructing the pile 28.
具体的には、基礎工は、既存の軌条１２の外側位置に全周回転式圧入機等を設置し、杭施工用下地工のスタンドパイプ３０を建て込み、杭施工機３２にて掘削を行い、杭２８を構築し、さらにフーチングを構築して形成されるようになっている。 Specifically, the foundation work installs an all-round rotary press-fitting machine, etc. at the outer position of the existing rail 12, builds a stand pipe 30 for the foundation work for pile construction, and performs excavation by the pile construction machine 32. The pile 28 is constructed, and a footing is constructed.
下部ガーダー２０は、図９、図１０に示すように、杭２８または杭施工用下地工のスタンドパイプ３０にブラケット３４を取り付け、このブラケット３４にジャッキ３６を介して移動用ローラ３８を支持させ、この移動用ローラ３８が下部ガーダー２０の下面側に取り付けたレール４０と係合し、移動用ローラ３８の駆動により軌条１２（図１参照）に沿って移動可能に支持されるようになっている。 As shown in FIGS. 9 and 10, the lower girder 20 attaches a bracket 34 to a pile 28 or a stand pipe 30 of a pile construction groundwork, and supports a moving roller 38 via a jack 36 to the bracket 34. The moving roller 38 engages with a rail 40 attached to the lower surface side of the lower girder 20 and is supported so as to be movable along the rail 12 (see FIG. 1) by driving the moving roller 38. .
この場合、下部ガーダー２０は、杭２８または杭施工用下地工のスタンドパイプ３０等に対して偏心した位置に支持され、杭の構築や高架橋等の上部工となる部材架設等に影響を与えることなく施工が可能となる。 In this case, the lower girder 20 is supported at an eccentric position with respect to the pile 28 or the stand pipe 30 of the foundation work for pile construction, and affects the construction of the pile and the construction of a member that becomes an upper work such as a viaduct. It becomes possible without construction.
また、下部ガーダー２０は、ジャッキ３６を介して支持されることで、このジャッキ３６を既設の軌条１２（図１参照）の縦断勾配に対応するものとして用い、ジャッキ３６により既設の軌条１２の縦断勾配に応じて容易に対応することができるようになっている。 Further, the lower girder 20 is supported via the jack 36 so that the jack 36 is used as one corresponding to the longitudinal gradient of the existing rail 12 (see FIG. 1). It is possible to easily cope with the gradient.
さらに、下部ガーダー２０は、図１１、図１２に示すように、複数本のガーダー部材４２を連結して形成されるようになっており、各ガーダー部材４２間には両側に少なくとも一対の水平曲線対応用の中折れ機構としての中折れジャッキ４４が設けられ、この中折れジャッキ４４の調整により、既設の軌条１２（図１参照）の水平曲線に応じて下部ガーダー２０を容易に対応させることができるようになっている。 Further, as shown in FIGS. 11 and 12, the lower girder 20 is formed by connecting a plurality of girder members 42, and between each girder member 42, at least a pair of horizontal curves on both sides. A middle folding jack 44 is provided as a middle folding mechanism for handling. By adjusting the middle folding jack 44, the lower girder 20 can be easily adapted to the horizontal curve of the existing rail 12 (see FIG. 1). It can be done.
上部ガーダー２４は、図１に示すように、移動装置付き脚４６を介して上部に前後方向に延びる前後方向ガイドレール４８が支持されている。 As shown in FIG. 1, the upper girder 24 supports a front-rear direction guide rail 48 extending in the front-rear direction via a leg 46 with a moving device.
移動装置付き脚４６は、図９及び図１０に示すように、移動装置５０により下部ガーダー２０の上方に下部ガーダー２０に沿って支持された状態となっており、移動装置５０の下端に配設された移動用ローラ５２が下部ガーダー２０の上面側に設けたレール５４と係合し、移動用ローラ５２の駆動により下部ガーダー２０上で移動可能にされている。 As shown in FIGS. 9 and 10, the moving device-equipped leg 46 is supported by the moving device 50 above the lower girder 20 along the lower girder 20 and is disposed at the lower end of the moving device 50. The movement roller 52 thus engaged is engaged with a rail 54 provided on the upper surface side of the lower girder 20, and is movable on the lower girder 20 by driving the movement roller 52.
前後方向ガイドレール４８は、上部ガーダー２４の横方向両側に一対設けられた状態となっている。 A pair of front and rear guide rails 48 are provided on both lateral sides of the upper girder 24.
そして、この一対の前後方向ガイドレール４８に、複数の可動式吊り装置５６が設けられている。 The pair of front and rear guide rails 48 are provided with a plurality of movable suspension devices 56.
これら複数の吊り装置５６は、杭２８または杭施工用の下地工を行うための各種施工機や施工材料を吊り下げ可能とするもので、複数台が同時使用可能とされている。 The plurality of suspension devices 56 can suspend various construction machines and construction materials for performing the pile 28 or the foundation work for pile construction, and a plurality of suspension devices 56 can be used simultaneously.
また、各吊り装置５６は、上部ガーダー２４に固定された前後方向の移動を可能とする前後方向ガイドレール４８に支持された図示せぬ横方向ガイドレールに横方向に移動可能に支持され、上部ガーダー２４の前後及び横方向の全域にわたり移動可能となっている。 Each suspension device 56 is supported by a lateral guide rail (not shown) supported by a longitudinal guide rail 48 fixed to the upper girder 24 and capable of moving in the longitudinal direction. The girder 24 is movable across the entire area in the front-rear and lateral directions.
また、この吊り装置５６には、図示せぬが、掘削排土用装置が取り付け可能とされ、杭施工用下地工のスタンドパイプ３０内の中掘により圧入抵抗を減少させることで、礫質地盤にも容易に対応できるようにされている。 In addition, although not shown in the figure, a device for excavation and soiling can be attached to the suspension device 56, and the gravel ground is reduced by reducing the press-fitting resistance by excavation in the stand pipe 30 of the foundation work for pile construction. Can be easily accommodated.
このように、吊り装置５６を上部ガーダー２４の前後及び横方向の全域にわたり移動可能とすることで、一方で杭施工用下地工のスタンドパイプ３０、他方で杭２８の施工等の同時施工を実現することが可能となり、工期短縮に寄与することが可能となり、さらに、下部ガーダー２０の外側両端部位置にブラケット２８の設置を可能にすることができる。 In this way, the suspension device 56 can be moved over the entire area of the upper girder 24 in the front-rear and lateral directions, thereby realizing simultaneous construction such as construction of the pile pipe 28 on the one hand and the pile 28 on the other hand. Therefore, it is possible to contribute to shortening the work period, and it is possible to install the brackets 28 at the positions of both ends of the lower girder 20.
また、上部ガーダー２４には、複数の移動装置付き脚４６に支持させた施工用ステージ５８が設けられている。 The upper girder 24 is provided with a construction stage 58 supported by a plurality of legs 46 with moving devices.
この施工用ステージ５８には、杭２８または杭施工用の下地工に用いる施工機を載置し、あるいは、杭施工用下地工のスタンドパイプ３０、鉄筋篭、ブラケット等の施工材料を仮置きするようになっている。 On the construction stage 58, a pile 28 or a construction machine used for the foundation work for pile construction is placed, or construction materials such as a stand pipe 30, a reinforcing bar rod and a bracket for the pile construction foundation work are temporarily placed. It is like that.
このように、施工用ステージ５８に杭施工機を載置して施工用ステージ５８から直接施工を行ったり、施工済み高架橋１４（図１参照）からの資材の運搬、仮置き等を行って、施工の効率化、用地の有効利用を図ることが可能となる。 In this way, a pile construction machine is placed on the construction stage 58 and construction is performed directly from the construction stage 58, or transportation of materials from the constructed viaduct 14 (see FIG. 1), temporary placement, etc., It is possible to improve the efficiency of construction and to effectively use the site.
さらに、上部ガーダー２４と下部ガーダー２０とは、図１に示すように、後方部でロッド状の緊結部材６０により緊結可能にされ、施工時における下部ガーダー２０を支持する杭２８または杭施工用の下地工に作用する荷重の均等化及び上部ガーダー２４の転倒を防止するようにしている。 Further, as shown in FIG. 1, the upper girder 24 and the lower girder 20 can be fastened by a rod-like fastening member 60 at the rear part, and support the lower girder 20 at the time of construction. The load acting on the groundwork is equalized and the upper girder 24 is prevented from falling.
部材架設用施工装置１８は、図１及び図２に示すように、基礎工上に高架橋１４等の上部工を行うもので、下部ガーダー２２と、上部ガーダー２６とは基礎工用施工装置１６の場合と同様に、汎用部材にて形成されている。 As shown in FIG. 1 and FIG. 2, the member erection construction device 18 performs an upper work such as a viaduct 14 on the foundation work, and the lower girder 22 and the upper girder 26 are provided by the foundation work construction apparatus 16. As in the case, it is formed of a general-purpose member.
下部ガーダー２４は、基礎工用施工装置１６の下部ガーダー２０と同様に図９及び図１０に示す構成となっており、詳細説明は省略する。 The lower girder 24 has the configuration shown in FIGS. 9 and 10 similarly to the lower girder 20 of the foundation work construction apparatus 16, and detailed description thereof will be omitted.
上部ガーダー２６は、前方移動装置６２及び後方移動装置６４により下部ガーダー２２及び高架橋１４の上方に下部ガーダー２２及び高架橋１４上の図示せぬレールに沿って移動可能に支持されている。 The upper girder 26 is supported by a forward moving device 62 and a backward moving device 64 so as to be movable along a rail (not shown) on the lower girder 22 and the viaduct 14 above the lower girder 22 and the viaduct 14.
前方移動装置６２は、背の高い移動装置からなり、上部ガーダー２６の前方部を支持し、後方移動装置６４は、背の低い移動装置からなり、上部ガーダー２６の後方部を支持している。 The forward moving device 62 is a tall moving device and supports the front part of the upper girder 26, and the backward moving device 64 is a short moving device and supports the rear part of the upper girder 26.
後方移動装置６４の下端部には、図示せぬが、移動用ローラが設けられ、この移動用ローラが構築された直上の高架橋１４の上面に配設された図示せぬレールに係合し、移動用ローラの駆動により前記レールに沿って移動可能にされている。 Although not shown, a moving roller is provided at the lower end of the rearward moving device 64, and engages with a rail (not shown) disposed on the upper surface of the viaduct 14 just above the moving roller, It can be moved along the rail by driving a moving roller.
また、上部ガーダー２６は、前方部及び後方部が前方移動装置６２及び後方移動装置６４に支持された状態で、幅方向に移動可能にされるとともに、前後方向で移動可能にされた天井クレーン装置６６を搭載し、プレキャスト部材である高架橋１４の橋脚６８、橋梁７０、床版７２等を搬送、組み立て可能にされている。 In addition, the upper girder 26 is an overhead crane device that is movable in the width direction and movable in the front-rear direction while the front portion and the rear portion are supported by the front moving device 62 and the rear moving device 64. 66 is mounted, and the pier 68, the bridge 70, the floor slab 72, etc. of the viaduct 14 as a precast member can be conveyed and assembled.
なお、この実施の形態では、プレキャスト部材としてフルプレキャスト部材を用い更なる工期の短縮化を図っている。 In this embodiment, a full precast member is used as the precast member to further shorten the work period.
この部材架設用施工装置１８においては、直上高架橋の通常の幅部はもちろん、拡幅部等の変断面あるいはスタンドパイプ間隔の急激な変化に対応する必要があり、さらには、直上高架橋高さの大幅な変化に対応する必要がある。 In the construction apparatus 18 for erection of members, it is necessary to cope with a sudden change of the cross section of the widened portion or the stand pipe or the interval between the stand pipes as well as the normal width portion of the directly elevated viaduct. It is necessary to respond to various changes.
特に、前方移動装置６２側は、後方移動装置６４の場合に比し、幅や高さについての影響を直接受けることとなる。 In particular, the front moving device 62 side is directly affected by the width and height as compared with the case of the rear moving device 64.
そのため、本実施の形態においては、図２及び図３に示すように、前方移動装置６２を、図１〜図３に示す進行方向Ａの両側部に位置する一対の脚部７４と、これら脚部７４を上部位置で連結する上部連結部７６とを有する門型状に形成し、図３及び図４に示すように、その上部連結部７６に、回転支持機構７８と、拡幅機構８０とを設けるとともに、一対の脚部７４に上下スライド機構９８を設けるようにしている。 Therefore, in the present embodiment, as shown in FIGS. 2 and 3, the forward moving device 62 includes a pair of leg portions 74 located on both sides in the traveling direction A shown in FIGS. The portion 74 is formed in a gate shape having an upper connecting portion 76 for connecting at an upper position. As shown in FIGS. 3 and 4, the upper connecting portion 76 is provided with a rotation support mechanism 78 and a widening mechanism 80. At the same time, a vertical slide mechanism 98 is provided on the pair of leg portions 74.
上部連結部７６は、図４に示すように、天井クレーン装置６６の横行レール８２の両端部側に脚部７４との連結部材８４が設けられており、この連結部材８４は進行方向Ａに沿う一対の平行片８６と、この一対の平行片８６の中間位置でこれと直交して一対の平行片８６を結ぶ交差片８８とを有する平面Ｈ字状となっている。 As shown in FIG. 4, the upper connecting portion 76 is provided with connecting members 84 with the leg portions 74 on both ends of the traverse rail 82 of the overhead crane device 66, and the connecting member 84 is along the traveling direction A. It has a plane H shape having a pair of parallel pieces 86 and a cross piece 88 that is orthogonal to the pair of parallel pieces 86 at an intermediate position between the pair of parallel pieces 86.
また、この連結部材８４と対向する脚部７４の上部も連結部材８４と対応して平面Ｈ字状となっている。 Further, the upper portion of the leg portion 74 facing the connecting member 84 also has a flat H shape corresponding to the connecting member 84.
回転支持機構７８は、外側の平行片８６と交差片８８との交差位置で１個の接合ピン９０により脚部７４と連結部材８４とを水平方向で回転可能に連結するとともに、内側の平行片８６の前後部に形成した接合ピン９０を中心とする回転奇跡に沿った円弧溝９２に脚部７４より突出させた接合ピン９４を摺動可能に係合させた状態となっている。 The rotation support mechanism 78 connects the leg portion 74 and the connecting member 84 so as to be rotatable in the horizontal direction by a single joining pin 90 at the crossing position of the outer parallel piece 86 and the crossing piece 88, and the inner parallel piece. The joining pin 94 protruded from the leg portion 74 is slidably engaged with the circular arc groove 92 along the rotation miracle centered on the joining pin 90 formed at the front and rear portions 86.
このように、上部連結部７６に設けた回転支持機構７８により一対の脚部７４を水平方向で回転可能に支持することで、前方移動装置６２の進行方向Ａへの移動の際における下部ガーダー２２の大幅な断面変化に確実に対応することができる。 As described above, the pair of leg portions 74 are rotatably supported in the horizontal direction by the rotation support mechanism 78 provided in the upper connecting portion 76, so that the lower girder 22 is moved in the movement direction A of the front moving device 62. It is possible to reliably cope with a large change in cross section.
この回転支持機構７８による場合には、例えば、１０ｍで約１．７５ｍの角度変化に対応することができるようになっている。 In the case of the rotation support mechanism 78, for example, an angle change of about 1.75 m can be handled at 10 m.
拡縮機構８０は、上部連結部８４の幅を拡縮することで一対の脚部７４の間隔を拡縮するもので、上部連結部８４は交差片８８に横行レール８２の両端部がスライド可能に連結された状態となっており、この交差片８８と横行レール８２にまたがって両側に伸縮ジャッキ９６が設けられ、この伸縮ジャッキ９６の伸縮によって一対の脚部７４の間隔が拡縮されるようになっている。 The expansion / contraction mechanism 80 expands / contracts the distance between the pair of leg portions 74 by expanding / contracting the width of the upper connecting portion 84, and the upper connecting portion 84 is connected to the cross piece 88 so that both ends of the traverse rail 82 are slidable. A telescopic jack 96 is provided on both sides across the crossing piece 88 and the transverse rail 82, and the space between the pair of leg portions 74 is expanded and contracted by the expansion and contraction of the telescopic jack 96. .
このように、上部連結部８４に設けた拡縮機構８０により上部連結部８４の幅を拡縮することで一対の脚部７４の間隔を拡縮することができ、これによって、回転支持機構７８と相まって、前方移動装置６２の進行方向Ａへの移動の際におけるスタンドパイプの間隔の極端な変化等、下部ガーダー２２の大幅な断面変化に確実に対応することができる。 As described above, the distance between the pair of leg portions 74 can be increased or decreased by expanding or contracting the width of the upper connecting portion 84 by the expansion / contraction mechanism 80 provided in the upper connecting portion 84, and in combination with the rotation support mechanism 78, It is possible to reliably cope with a large cross-sectional change of the lower girder 22 such as an extreme change in the distance between the stand pipes when the forward moving device 62 moves in the traveling direction A.
この拡縮機構８０による場合には、最大４．５ｍの拡縮が可能である。 In the case of the expansion / contraction mechanism 80, the maximum expansion / contraction of 4.5 m is possible.
上下スライド機構９８は、一対の脚部７４が上下方向で分割形成され、かつ、上下方向で伸縮可能に接合された上部脚部１００及び下部脚部１０２と、上部脚部１００及び下部脚部１０２の対応位置に長さ方向に沿って所定間隔で設けられた複数の連結孔１０４と、上部脚部１００及び下部脚部１０２の一方（例えば上部脚部１００）に設けられ、他方が連結孔１０４に対して脱着可能にされた一対の伸縮ジャッキ１０６と、所定の伸縮位置で上部脚部１００及び下部脚部１０２の対応位置の連結孔１０４に装着可能にされた連結ピン１０８とを有する。 The vertical slide mechanism 98 includes an upper leg portion 100 and a lower leg portion 102 in which a pair of leg portions 74 are divided in the vertical direction and joined to be extendable in the vertical direction, and the upper leg portion 100 and the lower leg portion 102. Are provided at one of the upper leg 100 and the lower leg 102 (for example, the upper leg 100), and the other is the connection hole 104. And a pair of telescopic jacks 106 that can be attached to and detached from each other, and a connecting pin 108 that can be attached to the connecting hole 104 at a corresponding position of the upper leg 100 and the lower leg 102 at a predetermined telescopic position.
連結孔１０４の間隔は、例えば０．８ｍで、スライド量が０．８ｍをこえる場合には、上下部脚部１００、１０２を連結ピン１０８で仮固定した後、伸縮ジャッキ１０６を盛替え、再度上部脚部１００を上下にスライドさせることで、高さ方向の変化に対応できるようになっている。 For example, when the distance between the connecting holes 104 is 0.8 m and the slide amount exceeds 0.8 m, the upper and lower leg portions 100 and 102 are temporarily fixed with the connecting pins 108, and then the expansion jack 106 is replaced and re-inserted. By sliding the upper leg 100 up and down, it is possible to cope with changes in the height direction.
また、この実施の形態では、６．４ｍ以上の高さの変化にも対応できるようにしている。 In this embodiment, it is possible to cope with a change in height of 6.4 m or more.
このように、伸縮ジャッキ１０６を盛替えることで、脚部７４を複数段の高さ位置に位置決めすることができ、その結果、直上高架橋１０４の大幅な高さの変化に確実に対応することができる。 Thus, by replacing the extension jack 106, the leg portion 74 can be positioned at a plurality of height positions, and as a result, it is possible to reliably cope with a significant change in the height of the overhead bridge 104. it can.
また、本実施の形態においては、図６〜図８に示すように、基礎工用施工装置１６は、下部ガーダー２０の上方に下部ガーダー２０に沿って支持された移動装置付き脚４６が、拡縮機構兼用の回転機構１１０により水平方向で回転可能にされている。 Moreover, in this Embodiment, as shown in FIGS. 6-8, as for the construction apparatus 16 for foundation works, the leg 46 with a moving apparatus supported along the lower girder 20 above the lower girder 20 is expanded / contracted. The rotating mechanism 110 also serves as a mechanism and can be rotated in the horizontal direction.
拡縮機構兼用の回転機構１１０は、図６及び図７に示すように、基礎工用施工装置１６の進行方向Ａに対し移動装置付き脚４６の移動用ローラ５２の角度を下部ガーダー２０の断面変化に追従させて変化可能としている。 As shown in FIGS. 6 and 7, the rotation mechanism 110 also serving as an expansion / contraction mechanism changes the angle of the moving roller 52 of the leg 46 with the moving device with respect to the traveling direction A of the foundation work construction device 16 and changes the cross section of the lower girder 20 It is possible to change by following.
この場合、移動装置付き脚４６は、前部側及び後部側が中央梁部材１１２に対して伸縮梁部材１１４を伸縮可能にしており、前部側の中央梁部材１１２は後部側の中央梁部材１１２よりも太く形成されて、かつ、前部側の中央梁部材１１２と伸縮梁部材１１４とは長孔１２０及びピン１２２にて連結されて、前部側の伸縮梁部材１１４は前部側の移動装置付き脚４６を水平方向で回転できるようにされている。 In this case, the front-side and rear-side legs 46 of the moving device-equipped leg 46 are capable of extending and retracting the telescopic beam member 114 with respect to the central beam member 112, and the front-side central beam member 112 is the rear-side central beam member 112. The central beam member 112 on the front side and the telescopic beam member 114 are connected by a long hole 120 and a pin 122, and the front side telescopic beam member 114 moves on the front side. The device-equipped leg 46 can be rotated in the horizontal direction.
そして、図８に示すように、前後部の移動装置付き脚４６をそれぞれ水平ブレース１１６で水平回転可能に連結し、それぞれの中央梁部材１１２及び伸縮梁部材１１４を油圧ジャッキ１１８にて連結した状態となっている。 Then, as shown in FIG. 8, the front and rear leg 46 with a moving device is connected to each other by a horizontal brace 116 so as to be horizontally rotatable, and the central beam member 112 and the telescopic beam member 114 are connected by a hydraulic jack 118. It has become.
このような拡縮機構兼用の回転機構１１０によれば、例えば図８（Ａ）のような移動装置付き脚４６が真っ直ぐ前方を向いた状態から、前部側の油圧ジャッキ１１８のみを伸長させれば、同図（Ｂ）に示すように、移動装置付き脚４６は外側を向くような角度に変化させることができ、逆の動作をさせることで移動装置付き脚４６を逆向きにさせることができる。 According to such a rotation mechanism 110 that also serves as an expansion / contraction mechanism, for example, if only the front-side hydraulic jack 118 is extended from a state in which the leg 46 with a moving device faces straight forward as shown in FIG. As shown in FIG. 5B, the leg 46 with the moving device can be changed to an angle facing outward, and the leg 46 with the moving device can be reversed by performing the reverse operation. .
また、この拡縮機構兼用の回転機構１１０は、前後部の油圧ジャッキ１１８を同方向に伸縮させることで、移動装置付き脚４６間の間隔の拡縮機構として機能することとなる。 Further, the rotation mechanism 110 also serving as an expansion / contraction mechanism functions as an expansion / contraction mechanism for the interval between the legs 46 with the moving device by expanding and contracting the hydraulic jacks 118 at the front and rear portions in the same direction.
このように、回転機構１１０によって、基礎工用施工装置１６においても、移動の際における下部ガーダー２０の大幅な断面変化に確実に対応することができる。 Thus, the rotation mechanism 110 can reliably cope with a large cross-sectional change of the lower girder 20 during the movement even in the foundation work construction device 16.
なお、本実施の形態においては、回転機構１１０は、拡張機構兼用となっているが、この例に限定されるものではなく、回転機構１１０とは別個に、中央梁部材１１２を伸縮可能に形成し、この中央梁部材１１２を油圧ジャッキ１１８とは別個に設けた油圧ジャッキにて伸縮させるような拡縮機構を設けるようにすることも可能である。 In the present embodiment, the rotation mechanism 110 is also used as an expansion mechanism. However, the rotation mechanism 110 is not limited to this example, and the central beam member 112 is formed to be extendable and contractable separately from the rotation mechanism 110. It is also possible to provide an expansion / contraction mechanism in which the central beam member 112 is expanded and contracted by a hydraulic jack provided separately from the hydraulic jack 118.
次に、このような直上高架橋の施工装置１０を用いた直上高架橋の施工方法について、主に図１を参照しつつ説明する。 Next, the construction method of the direct overhead viaduct using the construction apparatus 10 for direct overhead viaduct will be described mainly with reference to FIG.
まず、既存の軌条１２の外側位置に全周回転式圧入機等を配置し、杭施工用下地工のスタンドパイプ３０を建て込み、このスタンドパイプ３０にブラケット３４及びジャッキ３６（図９〜図１０参照）を取り付け、ジャッキ３６に移動用ローラ３８（図９、図１０参照）を取り付ける工程を複数箇所で行う。 First, an all-round rotary press-fitting machine or the like is arranged outside the existing rail 12 and a stand pipe 30 for pile construction is built, and a bracket 34 and a jack 36 (see FIGS. 9 to 10) are installed on the stand pipe 30. The step of attaching the moving roller 38 (see FIGS. 9 and 10) to the jack 36 is performed at a plurality of locations.
この状態で、基礎工用施工装置１６の下部ガーダー２０のレール４０（図１０参照）を移動用ローラ３８（図１０参照）に係合させて、下部ガーダー２０を支持させ、下部ガーダー２０上に移動装置付き脚４６の移動装置５０を移動可能に支持させ、その上に上部ガーダー２４を支持させる。 In this state, the rail 40 (see FIG. 10) of the lower girder 20 of the construction apparatus 16 for foundation work is engaged with the moving roller 38 (see FIG. 10) to support the lower girder 20, and on the lower girder 20 The moving device 50 of the leg 46 with the moving device is movably supported, and the upper girder 24 is supported thereon.
上部ガーダー２４には、予め施工用ステージ５８を取り付けておき、杭施工機３２等を載置しておく。 A construction stage 58 is attached to the upper girder 24 in advance, and a pile construction machine 32 and the like are placed thereon.
次いで、さらに前方位置に、複数の吊り装置５６を用いて各種施工機、施工材料等を取り付けて、杭施工用下地工のスタンドパイプ３０の建て込み及び杭施工機３２を用いた杭２８、フーチング（図示せず）等の構築を同時施工にて行いつつ、下部ガーダー２０を前進させる。 Next, various construction machines, construction materials, and the like are attached to the front position using a plurality of suspension devices 56, and the pile 28 and footing using the pile construction machine 32 are built in the stand pipe 30 of the foundation work for pile construction. The lower girder 20 is advanced while performing construction such as (not shown) by simultaneous construction.
この場合、礫質等の地盤などでは、吊り装置５６に掘削排土用装置を取り付けて施工を行うことで杭施工用下地工の施工効率を高めるようにしている。 In this case, on ground such as gravel, the excavation and earthing device is attached to the suspension device 56 to perform construction, thereby improving the construction efficiency of the pile construction groundwork.
次に、この後方の基礎工上に取り付けられた移動用ローラ３８（図９、図１０参照）に、部材架設用施工装置１８の下部ガーダー２２を移動可能に係合させ、その上に前方移動装置６２を移動可能に支持させるとともに、後方の杭２８上に橋脚６８、橋梁７０、床版７２の組み立てを行い、構築した高架橋１４上にレール（図示せず）を敷設して後方移動装置６４を移動可能に支持させる。 Next, the lower girder 22 of the member erection apparatus 18 is movably engaged with the moving roller 38 (see FIGS. 9 and 10) attached to the foundation work behind this, and moved forward on it. The apparatus 62 is movably supported, and the pier 68, the bridge 70, and the floor slab 72 are assembled on the rear pile 28, and a rail (not shown) is laid on the constructed viaduct 14 to move the rear movement apparatus 64. Is supported movably.
そして、前方移動装置６２及び後方移動装置６４上に部材架設用施工装置１８の上部ガーダー２６を支持させる。 Then, the upper girder 26 of the member erection apparatus 18 is supported on the forward moving device 62 and the backward moving device 64.
上部ガーダー２６上には、天井クレーン装置６６等を搭載しておく。 An overhead crane device 66 or the like is mounted on the upper girder 26.
次いで、前方の杭施工用下地工のスタンドパイプ３０の建て込み、杭２８の構築等の基礎工作業とともに、上部ガーダー２６上の天井クレーン装置６６を用いて後方の橋脚６８、橋梁７０、床版７２等の組み立てを行う。 Next, along with the foundation work such as the construction of the stand pipe 30 for the pile construction in the front and the construction of the pile 28, the overhead pier 68, the bridge 70, the floor slab are used by using the overhead crane device 66 on the upper girder 26. Assemble 72 etc.
次に、構築した高架橋１４の床版７２上にレール（図示せず）を敷設して、次の橋脚６８上に橋梁７０等を組み立てていく。 Next, rails (not shown) are laid on the floor slab 72 of the constructed viaduct 14, and the bridge 70 and the like are assembled on the next pier 68.
次に、橋梁７０を組み立てた隣の杭２８上に橋脚６８を組み立てて、次の高架橋１４の組み立ての準備を行う。 Next, the pier 68 is assembled on the adjacent pile 28 in which the bridge 70 is assembled, and preparation for assembling the next viaduct 14 is performed.
次の高架橋１４の組み立て準備が整った状態で、移動装置５０、前方移動装置６２及び後方移動装置６４により、各下部ガーダー２０、２２及び上部ガーダー２４、２６を前方に１スパン分移動させて、次の杭施工用下地工のスタンドパイプ３０の建て込み及び高架橋１４の組み立ての準備を行い、これを繰り返して高架橋１４を構築していくようになっている。 With the next viaduct 14 ready for assembly, the lower girder 20, 22 and upper girder 24, 26 are moved forward by one span by the moving device 50, the forward moving device 62 and the backward moving device 64, Preparation of the standpipe 30 of the next pile construction groundwork and assembly of the viaduct 14 is performed, and this is repeated to construct the viaduct 14.
この場合、基礎工においては、部材架設用施工装置１８を用いて構築した直上高架橋１４上を利用して施工材料を部材架設用施工装置１８の手前まで搬送し、部材架設用施工装置１８の搬送手段である天井クレーン装置６６及び基礎工用施工装置１６の吊り装置５６を用いて基礎工用の施工材料を直上高架橋１４上より施工用ステージ５８まで搬送して仮置きする。 In this case, in the foundation work, the construction material is transported to the front of the member erection construction device 18 using the directly overpass 14 constructed using the member erection construction device 18, and the member erection construction device 18 is transported. Using the overhead crane device 66 and the suspension device 56 of the foundation work construction device 16 as the means, the construction material for foundation work is transported from the overhead viaduct 14 to the construction stage 58 and temporarily placed.
基礎工用の施工材料を直上高架橋１４上より施工用ステージ５８まで搬送するに際しては、部材架設用施工装置１８の天井クレーン装置６６にて直上高架橋１４上の基礎工用の施工材料、例えば鉄筋篭を吊り上げ、その状態で天井クレーン装置６６を前方に移動させ、部材架設用施工装置１８と基礎工用施工装置１６との間に待機させた地上の図示せぬ軌道上運搬車上に一旦鉄筋篭を吊り下ろす。 When the construction material for the foundation work is transported from the directly overhead viaduct 14 to the construction stage 58, the construction material for the foundation work on the overhead viaduct 14 in the overhead crane apparatus 66 of the member erection construction apparatus 18, for example, a reinforcing bar In this state, the overhead crane device 66 is moved forward, and is temporarily placed between the member erection construction device 18 and the foundation work construction device 16 on the on-orbit track transportation vehicle (not shown). Suspend.
次いで、軌道上運搬車にて鉄筋篭を基礎工用施工装置１６の下部まで移動させ、そこで基礎工用施工装置１６の吊り装置５６にて施工用ステージ５８まで搬送するようにしている。 Next, the rebar bar is moved to the lower part of the foundation work construction device 16 by an on-orbit transport vehicle, and is transported to the construction stage 58 by the suspension device 56 of the foundation work construction device 16 there.
この場合、鉄筋篭を軌道上運搬車とともに吊り下ろし、鉄筋篭の搬送完了後に軌道上運搬車を天井クレーン装置６６にて回収してもよい。 In this case, the reinforcing bar rod may be suspended together with the on-orbit transport vehicle, and the on-orbit transport vehicle may be collected by the overhead crane device 66 after the transfer of the reinforcing bar rod is completed.
また、天井クレーン装置６６による施工材料の搬送は、直上高架橋１４の養生期間中に行えば、部材架設用施工装置１８の稼働に影響を与えることなく行うことが可能となる。 Moreover, if the construction material is conveyed by the overhead crane apparatus 66 during the curing period of the overhead viaduct 14, it can be performed without affecting the operation of the member erection construction apparatus 18.
そして、基礎工の進捗状況に応じて吊り装置５６により施工用ステージ５８に仮置きした施工材料を取り出し搬出して施工を行うことで、施工材料を他の搬送手段を用いることなく、さらには、他の用地を用いることなく搬送することができ、施工用ステージ５８に仮置きした施工材料を進捗状況に応じて取り出し施工することが可能となる。 And according to the progress status of the foundation work, the construction material temporarily placed on the construction stage 58 is taken out and carried out by the suspension device 56, so that the construction material can be used without using other transport means. It can be transported without using other sites, and the construction material temporarily placed on the construction stage 58 can be taken out and constructed according to the progress.
なお、軌条１２の縦断勾配及び水平曲折に対しては、図３〜図６に示すジャッキ３６及び中折れジャッキ４４の調節にて対応していくようになっている。 In addition, it respond | corresponds with the adjustment of the jack 36 and the middle folding jack 44 which are shown in FIGS.
このように、本実施の形態にかかる直上高架橋の施工装置１０を用いる場合には、基礎工用施工装置１６及び部材架設用施工装置１８は、それぞれ下部ガーダー２０、２２及び上部ガーダー２４、２６を有する汎用性のある低コストのものとすることができ、しかも、各施工装置１６、１８は先行して構築される杭２８または杭施工用の下地工であるスタンドパイプ３０に支持させることで、荷重支持のための全面的な地盤改良や整地作業、横断する地下埋設物などの防護工等の必要もないため、大幅なコスト低減と工期短縮を実現することができる。 Thus, when using the construction apparatus 10 for the directly elevated viaduct according to the present embodiment, the construction apparatus 16 for foundation work and the construction apparatus 18 for member erection include the lower girders 20 and 22 and the upper girders 24 and 26, respectively. It can be a versatile and low-cost one, and each construction device 16, 18 is supported by a pile 28 that is constructed in advance or a stand pipe 30 that is a foundation for pile construction, Since there is no need for ground improvement and leveling work for load support, and protective work such as underground buried objects that cross, it is possible to realize significant cost reductions and shortening of the construction period.
また、基礎工用施工装置１６で先行構築した杭２８または杭施工用の下地工であるスタンドパイプ３０に下部ガーダー２０、２２を支持させ、杭２８が構築された状態で後続の部材架設用施工装置１８により直上の高架橋１４を構築することができ、一連の施工作業を効率よく行うことができることとなる。 In addition, the lower girder 20 and 22 are supported by the pile 28 constructed in advance by the foundation construction apparatus 16 or the stand pipe 30 which is the foundation work for pile construction, and the construction for the subsequent member erection is performed with the pile 28 constructed. The directly overpass 14 can be constructed by the apparatus 18, and a series of construction work can be performed efficiently.
さらに、本実施の形態においては、部材架設用施工装置１８は、前方移動装置６２が下部ガーダー２２上を移動する際に、下部ガーダー２２の断面方向の角度変化が生じた場合に、上部連結部７６に設けた一対の脚部７４を水平方向で回転可能に支持する回転支持機構７８により、一対の脚部７４を回転させて下部ガーダー２２の断面方向の大幅な角度変化に対応させるようになっている。 Further, in the present embodiment, the member erection construction device 18 is configured such that when the forward moving device 62 moves on the lower girder 22, an angle change in the cross-sectional direction of the lower girder 22 occurs. A pair of leg portions 74 provided on 76 supports the pair of leg portions 74 so as to be rotatable in the horizontal direction, thereby rotating the pair of leg portions 74 so as to cope with a large angle change in the cross-sectional direction of the lower girder 22. ing.
また、前方移動装置６２が下部ガーダー２２上を移動する際に、下部ガーダー２２の断面方向の角度に急激な変化、例えば、スタンドパイプ３０の間隔の増減等の急激な変化が生じた場合に、上部連結部７６に設けた上部連結部７６の幅を拡縮する拡縮機構８０により、一対の脚部７４の間隔を拡縮することで回転支持機構７８による脚部７４の回転と相まって下部ガーダー２２の断面方向の急激な角度変化に対応するようにしている。 Further, when the forward moving device 62 moves on the lower girder 22, when a sudden change occurs in the angle in the cross-sectional direction of the lower girder 22, for example, an increase or decrease in the interval between the stand pipes 30, The cross section of the lower girder 22 coupled with the rotation of the leg portion 74 by the rotation support mechanism 78 by expanding / contracting the distance between the pair of leg portions 74 by the expansion / contraction mechanism 80 that expands / contracts the width of the upper connection portion 76 provided in the upper connection portion 76. It responds to sudden angle changes in direction.
この場合、基礎工用施工装置１６においても、回転機構１１０によって、移動装置付き脚４６を水平方向で回転させることにより、移動の際における下部ガーダー２０の大幅な断面変化に確実に対応することができることとなる。 In this case, in the foundation construction apparatus 16 as well, by rotating the leg 46 with the moving device in the horizontal direction by the rotating mechanism 110, it is possible to reliably cope with a large cross-sectional change of the lower girder 20 during the movement. It will be possible.
さらに、新設の直上高架橋１４の高さに変化が生じた場合に、上下スライド機構９８を用い、伸縮ジャッキ９６により上下部脚部１００、１０２の長さを調節して連結ピン１０８を上下部脚部１００、１０２に形成した対応位置の連結孔１０４に挿入して脚部７４の高さを調整し、さらに調整を必要とする場合には、伸縮ジャッキ９６を順次盛替えることにより必要な高さまで脚部７４の高さを調整するようにしている。 Further, when the height of the newly installed overhead viaduct 14 changes, the vertical slide mechanism 98 is used and the length of the upper and lower leg portions 100 and 102 is adjusted by the extension jack 96 to connect the connecting pin 108 to the upper and lower leg portions. When the height of the leg portion 74 is adjusted by inserting it into the connecting hole 104 at the corresponding position formed in the portions 100 and 102, and further adjustment is required, the extension jack 96 is sequentially refilled to the required height. The height of the leg 74 is adjusted.
このように、上部連結部７６に設けた回転支持機構７８により一対の脚部７４を水平方向で回転可能に支持することで、前方移動装置６２の移動の際における下部ガーダー２２の大幅な断面変化に確実に対応することができる。 In this way, by supporting the pair of legs 74 so as to be rotatable in the horizontal direction by the rotation support mechanism 78 provided in the upper connecting portion 76, a significant cross-sectional change of the lower girder 22 during the movement of the front moving device 62 is achieved. Can be dealt with reliably.
また、上部連結部７６に設けた拡縮機構８０により上部連結部７６の幅を拡縮することで一対の脚部７４の間隔を拡縮することができ、これによって、回転支持機構７８と相まって、前方移動装置６２の移動の際における下部ガーダー２２の大幅な断面変化に確実に対応することができる。 In addition, the space between the pair of leg portions 74 can be expanded and contracted by expanding and contracting the width of the upper connecting portion 76 by the expanding and contracting mechanism 80 provided in the upper connecting portion 76, thereby moving forward together with the rotation support mechanism 78. A large cross-sectional change of the lower girder 22 during the movement of the device 62 can be reliably handled.
そしてさらに、伸縮ジャッキ９６を盛替えることで、脚部７４を複数段の高さ位置に位置決めすることができ、その結果、直上高架橋１４の大幅な高さの変化に確実に対応することができる。 Further, by replacing the extension jack 96, the leg 74 can be positioned at a plurality of height positions, and as a result, it is possible to reliably cope with a significant change in the height of the overhead bridge 14 directly above. .
また、本実施の形態においては、基礎工において、下部ガーダー２０に沿って移動装置付き脚４６が移動する際に、下部ガーダー２０の断面方向の角度変化が生じた場合に、移動装置付き脚４６を拡縮機構兼用の回転機構１１０により水平方向で回転させて下部ガーダーの断面方向の角度変化に対応させるとともに、下部ガーダー２０に沿って移動装置付き脚４６が移動する際に、下部ガーダー２０の断面方向の角度に急激な変化が生じた場合に、拡縮機構兼用の回転機構１１０により移動装置付き脚４６の幅を拡縮することで回転機構による移動装置付き脚４６の回転と相まって下部ガーダー２０の断面方向の急激な角度変化に対応することが可能である。 Moreover, in this Embodiment, when the leg 46 with a moving apparatus moves along the lower girder 20 in a foundation work, when the angle change of the cross-sectional direction of the lower girder 20 arises, the leg 46 with a moving apparatus Is rotated in the horizontal direction by the rotation mechanism 110 also serving as an expansion / contraction mechanism to correspond to the change in angle in the cross-sectional direction of the lower girder, and when the leg 46 with the moving device moves along the lower girder 20, the cross section of the lower girder 20 When a sudden change occurs in the direction angle, the cross-section of the lower girder 20 is coupled with the rotation of the leg 46 with the moving device by the rotation mechanism by expanding and reducing the width of the leg 46 with the moving device by the rotating mechanism 110 that also serves as an expansion / contraction mechanism It is possible to cope with a sudden angle change in the direction.
本発明は、前記実施の形態に限定されるものではなく、本発明の要旨の範囲内において種々の形態に変形可能である。 The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.
例えば、前記実施の形態では、基礎工用施工装置及び部材架設用施工装置の下部ガーダーを別体としているが、基礎工用施工装置の移動装置と、部材架設用施工装置の前方移動装置とを兼用として下部ガーダーを一体として形成してもよい。 For example, in the above-described embodiment, the lower girder of the foundation work construction device and the member erection construction device is a separate body, but the movement device of the foundation work construction device and the forward movement device of the member erection construction device are provided. The lower girder may be integrally formed as a combined use.
また、杭施工用の下地工であるスタンドパイプに替えて、本設の鋼管杭を施工してもよい。 Further, instead of a stand pipe that is a foundation work for pile construction, a permanent steel pipe pile may be constructed.
１０ 直上高架橋の施工装置
１４ 高架橋
１６ 基礎工用施工装置
１８ 部材架設用施工装置
２０、２２ 下部ガーダー
２４、２６ 上部ガーダー
２８ 杭
４６ 移動装置付き脚
６２ 前方移動装置
６４ 後方移動装置
７４ 脚部
７６ 上部連結部
７８ 回転支持機構
８０ 拡縮機構
８４ 連結部材
９６、１０６ 伸縮ジャッキ
９８ 上下スライド機構
１００ 上部脚部
１０２ 下部脚部
１０４ 連結孔
１０８ 連結ピン
１１０ 回転機構
DESCRIPTION OF SYMBOLS 10 Overhead viaduct construction equipment 14 Viaduct 16 Foundation construction equipment 18 Member erection construction equipment 20, 22 Lower girder 24, 26 Upper girder 28 Pile 46 Leg 62 with moving device Forward moving device 64 Backward moving device 74 Leg 76 Upper portion Connection part 78 Rotation support mechanism 80 Expansion / contraction mechanism 84 Connection members 96, 106 Telescopic jack 98 Vertical slide mechanism 100 Upper leg part 102 Lower leg part 104 Connection hole 108 Connection pin 110 Rotation mechanism
Claims (5)
前記各施工装置は、先行して構築される杭または杭打設用の下地工に移動可能に支持された下部ガーダーと、前記下部ガーダーに対して移動可能にされた上部ガーダーとを有し、
前記部材架設用施工装置は、前記下部ガーダー上で前記上部ガーダーの前方部を移動可能に支持する前方移動装置と、前記上部ガーダーの後方部を構築された直上高架橋上で移動可能に支持する後方移動装置とを有する直上高架橋の施工装置であって、
前記前方移動装置は、進行方向の両側部に位置する一対の脚部と、これら脚部を上部位置で連結する上部連結部とを有する門型状とされ、
前記上部連結部は、前記一対の脚部を水平方向で回転可能に支持する回転支持機構と、上部連結部の幅を拡縮することで前記一対の脚部の間隔を拡縮する拡縮機構とを有することを特徴とする直上高架橋の施工装置。 It has a construction device for foundation work that performs substructure such as pile construction, and a construction device for member construction that performs superstructure such as viaduct on the foundation work,
Each construction device has a lower girder supported movably on a pile constructed in advance or a foundation for pile driving, and an upper girder made movable with respect to the lower girder,
The construction apparatus for member erection includes a forward moving device that supports the front part of the upper girder so as to be movable on the lower girder, and a rear side that supports the rear part of the upper girder so as to be movable on a directly elevated viaduct. It is a construction device for the directly elevated viaduct having a moving device,
The forward movement device has a gate shape having a pair of leg portions located on both sides in the traveling direction, and an upper connecting portion that connects the leg portions at an upper position,
The upper coupling portion includes a rotation support mechanism that supports the pair of leg portions so as to be rotatable in a horizontal direction, and an expansion / contraction mechanism that expands / contracts the interval between the pair of leg portions by expanding / contracting the width of the upper coupling portion. A construction device for the directly elevated viaduct.
前記一対の脚部は、上下スライド機構を有し、
前記上下スライド機構は、前記一対の脚部が上下方向で分割形成され、かつ、上下方向で伸縮可能に接合された上部脚部及び下部脚部と、前記上部脚部及び下部脚部の対応位置に長さ方向に沿って所定間隔で設けられた複数の連結孔と、前記上部脚部及び下部脚部の一方に設けられ、他方が前記連結孔に対して脱着可能にされた伸縮ジャッキと、所定の伸縮位置で前記上部脚部及び下部脚部の対応位置の連結孔に装着可能にされた連結ピンとを有することを特徴とする直上高架橋の施工装置。 In claim 1,
The pair of legs has a vertical slide mechanism,
The upper and lower slide mechanism has an upper leg portion and a lower leg portion in which the pair of leg portions are divided in the vertical direction and joined to be extendable in the vertical direction, and corresponding positions of the upper leg portion and the lower leg portion. A plurality of connecting holes provided at predetermined intervals along the length direction, and an extension jack provided in one of the upper leg portion and the lower leg portion, the other being detachable from the connecting hole, A construction apparatus for a directly elevated viaduct comprising a connecting pin that is attachable to a connecting hole at a corresponding position of the upper leg portion and the lower leg portion at a predetermined expansion / contraction position.
前記基礎工用施工装置は、下部ガーダーの上方に下部ガーダーに沿って支持された移動装置付き脚を有し、この移動装置付き脚は、回転機構により水平方向で回転可能にされ、かつ、拡縮機構により幅方向で拡縮可能にされていることを特徴とする直上高架橋の施工装置。 In claim 1 or 2,
The construction apparatus for foundation work has a leg with a moving device supported along the lower girder above the lower girder, and the leg with the moving device is rotatable in a horizontal direction by a rotation mechanism, and is expanded and contracted. A construction apparatus for a directly elevated viaduct characterized in that it can be expanded and contracted in the width direction by a mechanism.
前記部材架設用施工装置は、前記下部ガーダー上で前記上部ガーダーの前方部を移動可能に支持する前方移動装置と、前記上部ガーダーの後方部を構築された直上高架橋上で移動可能に支持する後方移動装置とを有し、前記前方移動装置は、進行方向の両側部に位置する一対の脚部と、これら脚部を上部位置で連結する上部連結部とを有する門型状とされ、
前方移動装置が下部ガーダー上を移動する際に、下部ガーダーの断面方向の角度変化が生じた場合に、前記上部連結部に設けた前記一対の脚部を水平方向で回転可能に支持する回転支持機構により、前記一対の脚部を回転させて下部ガーダーの断面方向の角度変化に対応させる工程と、
前方移動装置が下部ガーダー上を移動する際に、下部ガーダーの断面方向の角度に急激な変化が生じた場合に、前記上部連結部に設けた上部連結部の幅を拡縮する拡縮機構により、前記一対の脚部の間隔を拡縮することで前記回転支持機構による脚部の回転と相まって前記下部ガーダーの断面方向の急激な角度変化に対応する工程と、
新設の直上高架橋の高さに変化が生じた場合に、前記一対の脚部が上下方向で分割形成され、かつ、上下方向で伸縮可能に接合された上部脚部及び下部脚部と、前記上部脚部及び下部脚部の対応位置に長さ方向に沿って所定間隔で設けられた複数の連結孔と、前記上部脚部及び下部脚部の一方に設けられ、他方が前記連結孔に対して脱着可能にされた伸縮ジャッキと、所定の伸縮位置で前記上部脚部及び下部脚部の対応位置の連結孔に装着可能にされた連結ピンとを有する上下スライド機構を用い、前記伸縮ジャッキにより上下部脚部の長さを調節して連結ピンを上下部脚部に形成した対応位置の位置決め穴に挿入して脚部の高さを調整し、さらに調整を必要とする場合には、伸縮ジャッキを順次盛替えることにより必要な高さまで脚部の高さを調整する工程と、
を含むことを特徴とする直上高架橋の施工方法。 Using the construction equipment for foundation works that perform substructures such as pile construction and the construction equipment for construction of members that perform superstructure works such as viaducts on foundation works, the construction equipment for foundation works precedes the superstructure work. A process for constructing a pile or a foundation for pile driving, and a lower girder of the construction apparatus for foundation work movably supported by the previously constructed pile or foundation for pile driving, and this lower girder The process of supporting the upper girder of the construction apparatus for foundation work so as to be movable, and the lower girder of the construction apparatus for member construction being supported to be movable by the pile or the foundation work for laying the pile were constructed. The process of supporting the upper girder so that it can move on the overhead viaduct and the construction of the direct overhead viaduct on the pile constructed by the foundation construction equipment in conjunction with the movement of the foundation construction equipment Including the process of A method of constructing the bridge,
The construction apparatus for member erection includes a forward moving device that supports the front part of the upper girder so as to be movable on the lower girder, and a rear side that supports the rear part of the upper girder so as to be movable on a directly elevated viaduct. The forward movement device has a gate shape having a pair of leg portions located on both sides in the traveling direction, and an upper connection portion for connecting these leg portions at an upper position,
When the forward moving device moves on the lower girder, if the angle change in the cross-sectional direction of the lower girder occurs, the rotation support that supports the pair of legs provided on the upper connecting portion so as to be rotatable in the horizontal direction. A step of rotating the pair of legs by a mechanism to correspond to an angle change in a cross-sectional direction of the lower girder;
When the forward moving device moves on the lower girder, when an abrupt change occurs in the angle in the cross-sectional direction of the lower girder, by the expansion / contraction mechanism that expands / contracts the width of the upper connection portion provided in the upper connection portion, Corresponding to a sudden angle change in the cross-sectional direction of the lower girder in combination with the rotation of the legs by the rotation support mechanism by expanding and contracting the distance between the pair of legs,
When there is a change in the height of the newly installed overhead viaduct, the pair of legs are divided in the vertical direction, and the upper and lower legs are joined so as to be stretchable in the vertical direction, and the upper part A plurality of connecting holes provided at predetermined intervals along the length direction at corresponding positions of the leg portion and the lower leg portion, and provided in one of the upper leg portion and the lower leg portion, and the other to the connecting hole Using an up / down slide mechanism having a telescopic jack made detachable and a connecting pin made attachable to a connecting hole at a corresponding position of the upper leg portion and the lower leg portion at a predetermined telescopic position. Adjust the length of the leg and insert the connecting pin into the corresponding positioning hole formed on the upper and lower legs to adjust the height of the leg. The height of the legs is reduced to the required height by re-sequencing And the step of adjusting the,
A method for constructing a directly elevated viaduct.
前記基礎工用施工装置は、下部ガーダーの上方に下部ガーダーに沿って支持された移動装置付き脚を有し、この移動装置付き脚は、回転機構により水平方向で回転可能にされ、かつ、拡縮機構により幅方向で拡縮可能にされ、
前記下部ガーダーに沿って前記移動装置付き脚が移動する際に、下部ガーダーの断面方向の角度変化が生じた場合に、前記移動装置付き脚部を回転機構により水平方向で回転させて下部ガーダーの断面方向の角度変化に対応させる工程と、
前記下部ガーダーに沿って前記移動装置付き脚が移動する際に、下部ガーダーの断面方向の角度に急激な変化が生じた場合に、前記拡縮機構により前記移動装置付き脚の幅を拡縮することで前記回転機構による移動装置付き脚の回転と相まって前記下部ガーダーの断面方向の急激な角度変化に対応する工程と、
を含むことを特徴とする直上高架橋の施工方法。 In claim 4,
The construction apparatus for foundation work has a leg with a moving device supported along the lower girder above the lower girder, and the leg with the moving device is rotatable in a horizontal direction by a rotation mechanism, and is expanded and contracted. It is possible to expand and contract in the width direction by the mechanism,
When an angle change in the cross-sectional direction of the lower girder occurs when the leg with the moving device moves along the lower girder, the leg portion with the moving device is rotated in a horizontal direction by a rotating mechanism to A step of responding to the angle change in the cross-sectional direction;
When the leg with the moving device moves along the lower girder, when a sudden change occurs in the angle in the cross-sectional direction of the lower girder, the width of the leg with the moving device is expanded or reduced by the expansion / contraction mechanism. Corresponding to a sudden angle change in the cross-sectional direction of the lower girder in combination with the rotation of the leg with the moving device by the rotation mechanism;
A method for constructing a directly elevated viaduct.
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