JP5203662B2 - Bridge main girder erection method and erection girder horizontal mechanism - Google Patents

Bridge main girder erection method and erection girder horizontal mechanism Download PDF

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JP5203662B2
JP5203662B2 JP2007248482A JP2007248482A JP5203662B2 JP 5203662 B2 JP5203662 B2 JP 5203662B2 JP 2007248482 A JP2007248482 A JP 2007248482A JP 2007248482 A JP2007248482 A JP 2007248482A JP 5203662 B2 JP5203662 B2 JP 5203662B2
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girder
installation
bridge
pier
erection
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JP2009079395A (en
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浩史 松野
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MTEC CO., LTD.
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Description

本発明は、ＰＣ桁などの橋梁主桁の架設を、架設桁（エレクションガーダー）により吊り下げて行なう架設方法および架設桁の横取り機構に関するものである。   The present invention relates to an erection method in which a bridge main girder such as a PC girder is suspended by an erection girder (erection girder) and a framing mechanism for the erection girder.

架設桁による橋梁主桁の架設方法としては、上路式架設法、抱込み式架設法、吊下げ式架設法などがあり、このうち吊下げ式架設法に関しては、例えば特許文献１〜４に記載された発明がある。   As a method of erection of the bridge main girder by the erection girder, there are an upper-pass erection method, a embedment erection method, a suspension erection method, and the like. There are inventions made.

特開平０６−１９３０１７号公報Japanese Patent Laid-Open No. 06-193017 特開平０７−０５４３１５号公報JP 07-054315 A 特開平０９−２５６３２３号公報JP 09-256323 A 特開平１１−０８１２４４号公報JP-A-11-081244

吊下げ式架設法において、複数の橋梁主桁を橋脚間あるいは橋台と橋脚間（以下、簡単のため、橋脚間として説明する）に架設する際、並列する橋梁主桁を、順次、横方向に移動させる横取りの方法として、橋脚間に架設した架設桁を、橋脚上に設置したベントなどの上部に橋軸方向と直交する方向に敷設した横取りレールとレールに沿って移動する重量台車で支持し、橋梁主桁を吊り支持した架設桁ごと横移動させるようにすれば、橋梁主桁を仮置きしたり、他の支持装置に盛り替えることなく、架設を行なうことができる。   When suspending multiple bridge main girders between piers or between abutments and piers (hereinafter referred to as between piers for the sake of brevity) in the suspension-type installation method, the bridge main girders in parallel are sequentially placed in the horizontal direction. As a method of pre-moving, the installation girders installed between the piers are supported by pre-installed rails laid in the direction perpendicular to the bridge axis direction on the upper part of the vents installed on the piers and heavy trucks that move along the rails. If the bridge main girder is horizontally moved together with the bridge main girder suspended, the bridge main girder can be erected without being temporarily placed or replaced with another support device.

しかしながら、橋梁が拡幅する区間（図１参照）や曲線区間では、隣り合う橋脚の橋軸と直交する方向が平行でないため、並列する橋梁主桁の長さ、架設スパンおよび角度が異なっている。   However, in the section where the bridge is widened (see FIG. 1) and the curved section, the length, span and angle of the bridge main girder in parallel differ because the direction orthogonal to the bridge axis of the adjacent pier is not parallel.

その場合、拡幅や曲線の角度がわずかであればある程度ベント部分で対処させることも考えられるが、無理に横取りするとベントの負担が大きくなり、並列する橋梁主桁どうしの寸法差が大きいと、実質的に横取りが不可能となる。   In that case, if the width of the widening or the angle of the curve is small, it may be possible to cope with the vent part to some extent, but if it is forcibly seized, the burden of the vent will increase, and if the dimensional difference between the parallel bridge main beams is large, Preemption is impossible.

本発明は、このような課題の解決を図ったものであり、吊下げ式架設法において、橋梁が拡幅する場合や曲線区間がある場合でも、架設桁の横取りにより並列する橋梁主桁の架設を容易に行なうことができる橋梁主桁の架設方法および架設桁の横取り機構を提供することを目的としたものである。   The present invention is intended to solve such problems, and in the suspension-type installation method, even when the bridge is widened or there is a curved section, the bridge main girder can be installed in parallel by intercepting the installation girder. It is an object of the present invention to provide a bridge main girder erection method and a framing mechanism that can be easily performed.

本願の請求項１に係る架設桁による橋梁主桁の架設方法は、橋梁が拡幅する区間においても、長さ、架設スパンおよび角度が異なる隣り合う複数本の主桁を橋脚上に設けた横取り機構を用いて、吊下げ方式架設法で架設できるようにするための橋梁主桁の架設方法であって、前記橋脚上に複数並列配置した複数のベントと、前記複数のベントの頂部間に架け渡した形鋼からなる仮設横梁と、前記仮設横梁上に設置した横取りレールと、橋脚または橋台間に架け渡される架設桁を支持した状態で前記横取りレールに沿って車輪で走行する台車と、前記台車の上面と前記架設桁の下面との間に設置され、前記架設桁を載置した状態で、架設桁の支持点を架設桁軸方向および該架設桁の他端の支持点を中心とする回転方向にスライド可能とするすべり支承とを備える架設桁の横取り機構を、隣り合う橋脚上に設け、前記橋脚または橋台間に架け渡した架設桁によって主桁を吊支持した状態で、前記台車を前記横取りレールに沿って走行させ、橋梁の拡幅する区間においても、長さ、架設スパンおよび角度が異なる複数本の主桁を並列させて架設できるようにしたことを特徴とするものである。 The bridge main girder erection method using the erection girder according to claim 1 of the present application is a cross-sectional mechanism in which a plurality of adjacent main girders having different lengths, erection spans and angles are provided on the pier even in a section where the bridge is widened. A bridge main girder erection method for enabling installation by a suspension method erection method, wherein a plurality of vents arranged in parallel on the pier and a bridge between the tops of the plurality of vents A temporary cross beam made of a shaped steel, a horizontal rail installed on the temporary horizontal beam, a carriage that runs on wheels along the horizontal rail while supporting a bridge girder or a bridge girder spanned between the abutments, and the truck Is installed between the upper surface of the installation girder and the lower surface of the installation girder, and with the installation girder placed, the support point of the installation girder is rotated about the installation girder axial direction and the support point of the other end of the installation girder Anything that can slide in the direction The erection digit intercept mechanism and a bearing, provided on the neighboring piers, while supporting hanging the main beam by erection digit hung between the pier or abutment, is run along the carriage to the intercept rail In the widened section of the bridge, a plurality of main girders having different lengths, installation spans and angles can be installed in parallel.

本発明は、吊下げ式架設法において、橋梁が拡幅する場合や曲線区間がある場合など、並列する複数本の橋梁主桁について、その長さや架設スパン、角度が異なる場合でも、架設桁を支持するベント等に負担をかけることなく、橋梁主桁を吊り支持したままの状態で架設桁を横取り移動させ、橋梁主桁を安価に、かつ安全、迅速に橋脚間に架設できるようにしたものである。   The present invention supports suspension girder even when the length, span, and angle of multiple bridge main girders are different in parallel, such as when the bridge is widened or there is a curved section in the suspension construction method. The bridge girder can be installed between bridge piers at low cost, safely and quickly, without any burden on the vents, etc. is there.

すべり支承は、従来、橋脚や橋台の橋梁主桁を受けるシュー（沓）部分などに用いられているが、本発明では横取りの際、台車が橋桁の主軸に対し斜めに移動するのに対し、架設桁とそれを支持するベント等との間に生ずる水平力を低減する目的で使用する。構造的には橋梁のシューに用いられるすべり支承と同様のものを利用することができる。   Conventionally, the sliding bearing is used for the shoe (沓) part that receives the bridge main girder of the bridge pier or abutment, but in the present invention, the carriage moves obliquely with respect to the main axis of the bridge girder, It is used for the purpose of reducing the horizontal force generated between the erection girder and the vent that supports it. Structurally, the same sliding bearing used for the shoe of the bridge can be used.

すべり支承としては、すべり面をステンレス面とフッ素樹脂面で形成したものなどを用いることができる。 The to slip bearing, or the like can be used a sliding surface which is formed of stainless surface and a fluororesin surface.

ステンレス板の表面とフッ素樹脂コーティング面との間の低摩擦係数を利用したすべり支承は、その性能が従来から確認されており、比較的容易に利用することができる。   The performance of the sliding bearing using the low friction coefficient between the surface of the stainless steel plate and the fluororesin coating surface has been confirmed so far and can be used relatively easily.

本願の請求項２に係る発明は、上記請求項１に係る架設方法に適した架設桁の横取り機構に関するものであり、橋梁が拡幅する区間においても、長さ、架設スパンおよび角度が異なる隣り合う複数本の主桁を、吊下げ方式架設法で架設できるようにするための架設桁の横取り機構であって、橋脚上に複数並列配置した複数のベントと、前記複数のベントの頂部間に架け渡した形鋼からなる仮設横梁と、前記仮設横梁上に設置した横取りレールと、橋脚または橋台間に架け渡される架設桁を支持した状態で前記横取りレールに沿って車輪で走行する台車と、前記台車の上面と前記架設桁の下面との間に設置され、前記架設桁を載置した状態で、架設桁の支持点を架設桁軸方向および該架設桁の他端の支持点を中心とする回転方向にスライド可能とするすべり支承とを備えることを特徴とするものである。 The invention according to claim 2 of the present application relates to a horizontal installation mechanism for a construction girder suitable for the construction method according to claim 1 and is adjacent to each other in a length, a construction span, and an angle even in a section where the bridge is widened. A horizontal girder mechanism for installing a plurality of main girders by means of a suspension-type construction method, wherein a plurality of vents arranged in parallel on a bridge pier and between the tops of the plurality of vents A temporary horizontal beam made of a crossed steel, a horizontal rail installed on the temporary horizontal beam, and a carriage that travels with wheels along the horizontal rail while supporting a bridge girder spanned between a pier or an abutment , and Installed between the upper surface of the carriage and the lower surface of the installation girder, with the installation girder placed, the support point of the installation girder is centered on the installation beam axis direction and the support point of the other end of the installation girder Can slide in rotation direction It is characterized in further comprising a sliding bearing for.

横取りレール、台車、すべり支承等は、架設方法に関して説明した通りである。   The horizontal rail, carriage, slide support, etc. are as described for the construction method.

本発明によれば、吊下げ式架設法において、橋梁が拡幅する場合や曲線区間がある場合など、並列する複数本の橋梁主桁について、その長さや架設スパン、角度が異なる場合でも、架設桁を支持するベント等に負担をかけることなく、橋梁主桁を吊り支持したままの状態で架設桁を横取り移動させ、橋梁主桁を橋脚間に架設することができる。   According to the present invention, in the suspension-type erection method, even when the length, erection span, and angle of the bridge main girder in parallel are different, such as when the bridge is widened or there is a curved section, the erection girder is different. The bridge girder can be bridged between the piers by placing the bridge girder in a state where the bridge main girder is suspended and supported without placing a burden on the vents that support the bridge.

橋梁主桁を吊り支持したままの状態で架設桁を横取り移動させるので、主桁支持の盛り替えを必要とせず、安価に、かつ安全、迅速に施工を行うことができる。   Since the construction girder is moved sideways while the bridge main girder is suspended and supported, the main girder support is not required to be replaced, and the construction can be performed inexpensively, safely, and quickly.

以下、本発明の最良の実施形態を、添付図面に基づいて説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

図１〜図５は、本発明を道路橋の拡幅区間（橋脚Ｐ４−Ｐ６）に適用した場合の実施形態を示したもので、この例では上り線と下り線が並列する別々の橋脚Ｐ上に架設されている。なお、Ｐ４〜Ｐ６における数字は多径間の橋梁の何番目の橋脚であるかを示し、並列する橋脚には同じ数字を用いている。   1 to 5 show an embodiment in the case where the present invention is applied to a widening section (pier P4-P6) of a road bridge. It is built in. Note that the numbers in P4 to P6 indicate the number of piers of the multi-span bridge, and the same numbers are used for the parallel piers.

図１は架設桁９を支持するベント３の配置例を示しており、図２は図１の拡幅区間について、架設桁９が橋脚Ｐ５、Ｐ６間で支持され、橋梁主桁１１を橋脚Ｐ５、Ｐ６間に架設する様子を示している。図２において、符号１は橋脚の基礎部、符号２は側方に張り出す橋脚頂部を示している。   FIG. 1 shows an example of the arrangement of the vent 3 that supports the erection girder 9, and FIG. 2 shows the widening section of FIG. 1 in which the erection girder 9 is supported between the piers P5 and P6, and the bridge main girder 11 is connected to the pier P5, A state of erection between P6 is shown. In FIG. 2, the code | symbol 1 has shown the base part of the bridge pier, and the code | symbol 2 has shown the bridge pier top part projected to the side.

図１に示すように、橋脚Ｐ４−Ｐ６にかけて拡幅しているため、この区間に架設される隣り合う橋梁主桁１１どうしは平行ではなく、長さも中央の橋梁主桁１１が短く、両側の橋梁主桁１１が長くなっている。   As shown in FIG. 1, since it is widened over the bridge piers P4 to P6, the adjacent bridge main girders 11 installed in this section are not parallel to each other, and the length of the bridge main girder 11 in the center is short, and the bridges on both sides The main girder 11 is longer.

図３は、本実施形態における架設桁９の横取り機構の詳細を示したものであり、橋脚Ｐ上のベント３の頂部に、橋軸直交方向に延びる形鋼からなる仮設横梁４を設置し、その上に仮設横梁４に沿って横取りレール５が設けられている。   FIG. 3 shows the details of the horizontal arrangement mechanism of the installation girder 9 in the present embodiment. At the top of the vent 3 on the pier P, a temporary horizontal beam 4 made of a shape steel extending in the direction orthogonal to the bridge axis is installed. A horizontal rail 5 is provided along the temporary horizontal beam 4 thereon.

この横取りレール５に沿って、車輪７で走行する重量台車６が設けられ、台車６上に架設桁９を載置する構成としている。   A heavy truck 6 that runs on wheels 7 is provided along the pre-rail 5 and a construction beam 9 is placed on the carriage 6.

台車６の上面と架設桁９の下面との間には、すべり支承８を介在させてあり、台車６が横取りレール５に沿って移動する際に、架設桁９の支持点を橋軸方向にスライドさせることができるようになっている。   A sliding bearing 8 is interposed between the upper surface of the carriage 6 and the lower surface of the erection girder 9. When the trolley 6 moves along the horizontal rail 5, the support point of the erection girder 9 is moved in the direction of the bridge axis. It can be slid.

このような構成において、図２の橋脚Ｐ５、Ｐ６間に架け渡した架設桁９から、桁吊装置１０の吊り材で橋梁主桁１１を吊り下げ、その状態で、架設桁９を支持する台車６を横取りレール５に沿って移動させることで、長さの異なる主桁１１を、順次、橋脚Ｐ５、Ｐ６間に並列させて架設して行くことができる。   In such a configuration, the bridge main girder 11 is suspended from the erection girder 9 spanned between the piers P5 and P6 in FIG. By moving 6 along the horizontal rail 5, the main girders 11 having different lengths can be sequentially installed in parallel between the bridge piers P5 and P6.

図４は、橋脚Ｐ５上への橋梁主桁１１の架設の様子を示したもので、２段のベント３上に仮設梁４が架設され（図２の橋脚Ｐ６位置の状態）、その上面に設けられた横取りレール５上を、架設桁９を支持する重量台車６が走行する。架設桁９から桁吊装置１０の吊り材で吊った橋梁主桁１１を、橋脚頂部２の所定位置に吊り降ろし、架設する。   FIG. 4 shows the construction of the bridge main girder 11 on the pier P5. The temporary beam 4 is erected on the two-stage vent 3 (in the position of the pier P6 in FIG. 2), and on the upper surface thereof. A heavy truck 6 that supports the erection girder 9 runs on the provided horizontal rail 5. The bridge main girder 11 hung from the erection girder 9 by the hanger of the girder suspension device 10 is hung at a predetermined position on the pier top 2 and installed.

図５は、橋脚Ｐ５上への橋梁主桁１１の架設が完了し、架設した橋梁主桁１１の上にベント３を１段載置し（図２の橋脚Ｐ５位置の状態）、次工程へ進む際の様子を示したものである。   FIG. 5 shows that the bridge main girder 11 has been installed on the bridge pier P5, and one stage of the vent 3 is placed on the installed bridge main girder 11 (the state of the pier P5 position in FIG. 2), and the next step is performed. It shows the situation when moving forward.

本発明を適用する橋梁の拡幅区間（橋脚Ｐ４−Ｐ６）について、架設桁を支持するベントの配置例を示す平面図である。It is a top view which shows the example of arrangement | positioning of the vent which supports a construction girder about the widening area (bridge pier P4-P6) of the bridge to which this invention is applied. 図１の拡幅区間について、架設桁が橋脚Ｐ５、Ｐ６間で支持され、橋梁主桁を橋脚Ｐ５、Ｐ６間に架設する様子を示す橋軸直角方向から見た立面図である。FIG. 2 is an elevational view seen from a direction perpendicular to the bridge axis, showing a state in which the erection girder is supported between the piers P5 and P6 and the main bridge girder is erected between the piers P5 and P6 with respect to the widening section of FIG. 本実施形態における架設桁の横取り機構の一例を示す橋軸直角方向から見た立面図である。It is the elevation view seen from the bridge axis perpendicular direction which shows an example of the installation mechanism of the construction girder in this embodiment. 橋脚Ｐ５上への橋梁主桁の架設の様子を示す橋軸と直角な面における断面図である。It is sectional drawing in the surface at right angles to the bridge axis which shows the mode of construction of the bridge main girder on the pier P5. 橋脚Ｐ５上への橋梁主桁の架設が完了し、次工程へ進む際の様子を示す橋軸と直角な面における断面図である。It is sectional drawing in the surface at right angles to the bridge axis which shows the mode at the time of progressing to the next process after erection of the bridge main girder on the pier P5 is completed.

符号の説明Explanation of symbols

Ｐ（Ｐ４，Ｐ５，Ｐ６）…橋脚、
１…橋脚基礎部、２…橋脚頂部、３…ベント、４…仮設横梁、５…横取りレール、６…台車、７…車輪、８…すべり支承、９…架設桁、１０…桁吊装置、１１…橋梁主桁 P (P4, P5, P6) ... pier,
DESCRIPTION OF SYMBOLS 1 ... Pier base part, 2 ... Pier top part, 3 ... Vent, 4 ... Temporary cross beam, 5 ... Side rail, 6 ... Carriage, 7 ... Wheel, 8 ... Sliding support, 9 ... Construction girder, 10 ... Girder suspension device, 11 ... Bridge main girder

Claims (2)

橋梁が拡幅する区間においても、長さ、架設スパンおよび角度が異なる隣り合う複数本の主桁を橋脚上に設けた横取り機構を用いて、吊下げ方式架設法で架設できるようにするための橋梁主桁の架設方法であって、前記橋脚上に複数並列配置した複数のベントと、前記複数のベントの頂部間に架け渡した形鋼からなる仮設横梁と、前記仮設横梁上に設置した横取りレールと、橋脚または橋台間に架け渡される架設桁を支持した状態で前記横取りレールに沿って車輪で走行する台車と、前記台車の上面と前記架設桁の下面との間に設置され、前記架設桁を載置した状態で、架設桁の支持点を架設桁軸方向および該架設桁の他端の支持点を中心とする回転方向にスライド可能とするすべり支承とを備える架設桁の横取り機構を、隣り合う橋脚上に設け、前記橋脚または橋台間に架け渡した架設桁によって主桁を吊支持した状態で、前記台車を前記横取りレールに沿って走行させ、橋梁の拡幅する区間においても、長さ、架設スパンおよび角度が異なる複数本の主桁を並列させて架設できるようにしたことを特徴とする架設桁による橋梁主桁の架設方法。 A bridge that can be installed by the suspension system installation method using a pre-installation mechanism in which a plurality of adjacent main girders with different lengths, installation spans, and angles are provided on the pier even in a section where the bridge is widened A method for installing a main girder, wherein a plurality of vents arranged in parallel on the pier, a temporary transverse beam made of a shape steel bridged between the tops of the plurality of vents, and a horizontal rail installed on the temporary transverse beam And a carriage that runs on wheels along the pre-rails in a state of supporting an installation girder spanned between a pier or an abutment, and is installed between an upper surface of the carriage and a lower surface of the installation girder, and the installation girder In the state where the installation girder is mounted, a horizontal mechanism for the installation girder including a sliding bearing that allows the support point of the installation girder to slide in the axial direction of the installation girder and the rotation direction around the support point at the other end of the installation girder, On the adjacent pier Only, while supporting hanging the main beam by erection digit hung between the pier or abutment, the carriage is traveling along said intercepted rail, even in a section where widening of the bridge, length, erection span and angle A construction method of a bridge main girder by a construction girder characterized in that a plurality of main girder with different spar can be constructed in parallel. 橋梁が拡幅する区間においても、長さ、架設スパンおよび角度が異なる隣り合う複数本の主桁を、吊下げ方式架設法で架設できるようにするための架設桁の横取り機構であって、橋脚上に複数並列配置した複数のベントと、前記複数のベントの頂部間に架け渡した形鋼からなる仮設横梁と、前記仮設横梁上に設置した横取りレールと、橋脚または橋台間に架け渡される架設桁を支持した状態で前記横取りレールに沿って車輪で走行する台車と、前記台車の上面と前記架設桁の下面との間に設置され、前記架設桁を載置した状態で、架設桁の支持点を架設桁軸方向および該架設桁の他端の支持点を中心とする回転方向にスライド可能とするすべり支承とを備えることを特徴とする架設桁の横取り機構。 In the section where the bridge is widened, it is a horizontal installation mechanism for the installation girder so that multiple adjacent main girders with different lengths, installation spans and angles can be installed by the suspension system installation method. A plurality of vents arranged in parallel to each other, a temporary horizontal beam made of a shape steel bridged between the tops of the plurality of vents, a horizontal rail installed on the temporary horizontal beam, and a construction girder spanned between a pier or an abutment Is installed between the carriage that runs on the wheels along the horizontal rail in a state of supporting the carriage, and the upper surface of the carriage and the lower surface of the installation girder, and the installation girder is placed on the support point of the installation girder A sliding mechanism for the installation girder, comprising: a sliding bearing that is slidable in an axial direction of the installation girder and in a rotation direction about a support point at the other end of the installation girder.
JP2007248482A 2007-09-26 2007-09-26 Bridge main girder erection method and erection girder horizontal mechanism Expired - Fee Related JP5203662B2 (en)

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