JP5693869B2 - Bridge girder construction method - Google Patents

Bridge girder construction method Download PDF

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JP5693869B2
JP5693869B2 JP2010076769A JP2010076769A JP5693869B2 JP 5693869 B2 JP5693869 B2 JP 5693869B2 JP 2010076769 A JP2010076769 A JP 2010076769A JP 2010076769 A JP2010076769 A JP 2010076769A JP 5693869 B2 JP5693869 B2 JP 5693869B2
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girder
bridge girder
bridge
bearings
crawler crane
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JP2011208419A (en
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功如 三井
功如 三井
知之 尾川
知之 尾川
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Nishimatsu Construction Co Ltd
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Description

本発明は、橋桁の架設方法に関する。   The present invention relates to a method for installing a bridge girder.

従来の橋桁の架設方法には、トラッククレーンやフローティングクレーンなどで下部から橋桁を吊り上げ架設する方法がある(例えば、特許文献1参照)。   As a conventional bridge girder erection method, there is a method in which a bridge girder is suspended from a lower part by a truck crane, a floating crane, or the like (see, for example, Patent Document 1).

また、既設の橋桁からオーバーハング状にブロックを継ぎ足していくことで橋桁を架設する方法もある(例えば、特許文献2参照)。   In addition, there is a method of installing a bridge girder by adding blocks in an overhang shape from an existing bridge girder (see, for example, Patent Document 2).

特開2007−31963号公報JP 2007-31963 A 特開2009−287360号公報JP 2009-287360 A

ところで、橋脚が高い場合には、下部から橋桁を吊り下げ架設するには大規模なクレーン設備が必要となる。特に、ダム躯体の天端に橋梁を架設する場合には、下部から橋桁を架設するのは困難である。
また、橋桁が長くなると重くなり、下部から橋桁を吊り下げ架設するのが困難となる。
By the way, when the bridge pier is high, a large-scale crane facility is required to suspend the bridge girder from the bottom. In particular, when a bridge is constructed at the top of the dam housing, it is difficult to construct a bridge girder from the bottom.
In addition, as the bridge girder becomes longer, it becomes heavier and it becomes difficult to suspend the bridge girder from the bottom.

そこで、橋の一方の端部から、プレキャストコンクリートを用いた橋桁(PC桁)を複数架設し、横組工により一体化することが考えられる。しかし、1径間の作業が(1)支承の形成、(2)橋桁の架設、(3)足場組、(4)横組コンクリート打設、養生(5)横締緊張工・横締グラウト定着、養生を繰り返すため、長期間の施工となる。   Therefore, it is conceivable to construct a plurality of bridge girders (PC girders) using precast concrete from one end of the bridge and to integrate them by horizontal assembly. However, the work of one span is (1) formation of support, (2) bridge girder construction, (3) scaffolding assembly, (4) horizontal concrete placement, curing (5) lateral tension tension work / horizontal tension grout fixing In order to repeat the curing, it will be a long-term construction.

本発明の課題は、短期間で施工可能な橋桁の架設方法を提供することである。   The subject of this invention is providing the construction method of the bridge girder which can be constructed in a short period of time.

以上の課題を解決するため、請求項1に記載の発明は、
支承間に複数のPC桁を架設し、架設した前記PC桁に足場及び防護柵を設ける第1工程と、
前記架設した複数のPC桁の横間の隙間へコンクリートを打設するとともに、前記架設した複数のPC桁に鋼線を横締緊張し、定着させる第2工程と、を有する橋桁の架設方法であって、
支承間で前記第1工程を行った後、前記第2工程を開始する前に、前記架設したPC桁上への作業構台の設置、前記架設したPC桁に仮緊張を行ってから、前記作業構台の上から次に架設する支承間で前記第1工程を行うことを特徴とする。
In order to solve the above problems, the invention described in claim 1
A first step in which a plurality of PC girders are installed between the supports, and a scaffold and a protective fence are provided on the installed PC girders;
A method of laying a bridge girder having a second step of placing concrete in gaps between the plurality of PC girders installed and laterally tightening and fixing steel wires to the plurality of PC girders installed There,
After performing the first step between the bearings and before starting the second step, the work gantry is installed on the installed PC girder and the tension is applied to the installed PC girder. The first step is performed between the supports to be installed next from the top of the gantry .

請求項2に記載の発明は、請求項1に記載の橋桁の架設方法であって、
前記作業構台の設置は、前記架設したPC桁の上部にH形鋼を固定し覆工板で覆うことにより行うことを特徴とする。
The invention according to claim 2 is the method for erection of the bridge girder according to claim 1,
The work gantry is installed by fixing an H-shaped steel to the upper part of the installed PC girder and covering it with a lining plate.

請求項3に記載の発明は、請求項2に記載の橋桁の架設方法であって、
前記第1工程が完了した支承間の前記覆工板の上部にクローラークレーンを配置し、
前記クローラークレーンにより次の支承間にPC桁を架設することを特徴とする。
The invention according to claim 3 is a method for erection of the bridge girder according to claim 2,
Place a crawler crane on top of the lining plate between the bearings where the first step is completed ,
A PC girder is installed between the next supports by the crawler crane.

請求項4に記載の発明は、請求項3に記載の橋桁の架設方法であって、
前記クローラークレーンが配置された支承間よりも先に前記第1工程が完了した支承間の前記覆工板の上部にポールトレーラーを配置し、
前記ポールトレーラーにより未設のPC桁を前記クローラークレーンに供給することを特徴とする。
The invention according to claim 4 is a method for erection of the bridge girder according to claim 3,
Placing a pole trailer on top of the lining plate between the bearings where the first step has been completed prior to between the bearings where the crawler crane is located;
An unsettled PC girder is supplied to the crawler crane by the pole trailer.

請求項5に記載の発明は、請求項1〜4のいずれか一項に記載の橋桁の架設方法であって、
前記第2工程を複数支承間同時に行うことを特徴とする。
The invention according to claim 5 is the bridge girder construction method according to any one of claims 1 to 4,
The second step is performed simultaneously between a plurality of bearings .

本発明によれば、第1工程を行った支承間で第2工程を開始する前に、架設したPC桁上への作業構台の設置、架設したPC桁に仮緊張を行ってから、作業構台の上から次に架設する支承間で第1工程を行うので、第2工程のクリティカルとなる養生期間を待たなくて良くなり、短期間で橋桁を架設することができる。
また、第2工程では、複数支承間を同時に施工することが可能となるため、短期間で橋桁を架設することができる。
According to the present invention, before starting the second step between the bearings that have performed the first step, the work gantry is placed on the installed PC girder after temporary tension is applied to the installed PC girder. Since the first process is carried out between the supports to be installed next from the top, it becomes unnecessary to wait for the critical curing period of the second process, and the bridge girder can be installed in a short period of time.
In the second step, since it is possible to construction between multiple support simultaneously, it is possible to erection the bridge girder in a short period of time.

本発明の実施形態に係る橋桁の架設方法を示す側面図である。It is a side view which shows the construction method of the bridge girder which concerns on embodiment of this invention. 図1のII−II矢視図である。It is an II-II arrow line view of FIG.

以下、図を参照して本発明を実施するための最良の形態を詳細に説明する。
図1は本発明の実施形態に係る橋桁の架設方法を示す側面図であり、図2は図1のII−II矢視図である。なお、以下の実施形態においては、ダムの躯体1の天端に架設される橋梁について説明するが、本発明はこれに限られるものではなく、地山の上に設けられた橋台及び橋脚へ橋桁を架設する際に本発明を適用してもよい。
Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view showing a bridge girder construction method according to an embodiment of the present invention, and FIG. 2 is a view taken along the line II-II in FIG. In the following embodiment, a bridge constructed at the top of the dam housing 1 will be described. However, the present invention is not limited to this, and a bridge girder is constructed on an abutment and a pier provided on a natural ground. In this case, the present invention may be applied.

図1に示すように、ダムの躯体1上に橋台2及び橋脚3が設けられている。橋台2及び橋脚3の上部にはPC桁を支持する支承が設けられており、支承間にPC桁4が架設されている。PC桁4の既設部分においては、PC桁4の上部にH形鋼5が設置されている。H形鋼5はアンカーボルト6によりPC桁4に固定される。 As shown in FIG. 1, an abutment 2 and a pier 3 are provided on a dam housing 1. At the upper part of the abutment 2 and the pier 3, a support for supporting the PC girder is provided, and the PC girder 4 is installed between the supports. In the existing part of the PC girder 4, an H-section steel 5 is installed on the top of the PC girder 4. The H-section steel 5 is fixed to the PC girder 4 with anchor bolts 6.

図2に示すように、左右端部のPC桁4には、側部足場7及び防護柵8が設けられている。また、H形鋼5の左右側端部には、防護柵9が設けられている。   As shown in FIG. 2, side scaffolds 7 and protective fences 8 are provided on the PC girders 4 at the left and right ends. Further, protective fences 9 are provided at the left and right ends of the H-shaped steel 5.

H形鋼5の上部には覆工板10が設けられている。覆工板10の上部には、ポールトレーラー11と、クローラークレーン12が配置され、稼動している。
ポールトレーラー11は、未設部分のPC桁4をクローラークレーン12の作業半径内まで運搬する。
クローラークレーン12は、ポールトレーラー11上のPC桁4を未設部分の支承間に運搬する。
なお、図1においては、橋台2に最も近い支承間にポールトレーラー11が配置され、2番目の支承間にクローラークレーン12が配置され、クローラークレーン12は3番目の支承間にPC桁4を架設している。
A lining plate 10 is provided on the top of the H-shaped steel 5. A pole trailer 11 and a crawler crane 12 are disposed on the lining plate 10 and are in operation.
The pole trailer 11 conveys the PC girder 4 in the non-installed portion into the working radius of the crawler crane 12.
The crawler crane 12 conveys the PC girder 4 on the pole trailer 11 between the unsupported parts.
In FIG. 1, the pole trailer 11 is disposed between the nearest bearing to the abutment 2, the crawler crane 12 is disposed between the second bearing, the crawler crane 12 spans the PC girder 4 between the third bearing doing.

ここで、本発明に係る橋桁の架設方法について説明する。
(A1) まず、橋台2背面の躯体1上にクローラークレーン12およびポールトレーラー11を配置する。
(A2) 次に、クローラークレーン12によりポールトレーラー11上のPC桁4を最初の支承間(橋台2と橋脚3の間)に架設する。
(A3) 次に、架設したPC桁4に側部足場7及び防護柵8を設ける。
(A4) 次に、架設したPC桁4の上部にH形鋼5を設置し、アンカーボルト6によりPC桁4に固定する。
(A5) 次に、H形鋼5に覆工板10を設置することで、作業構台を設置する。次にPC桁4の仮緊張を行う。
(A6) 次に、覆工板10上にクローラークレーン12を配置する。
Here, the construction method of the bridge girder according to the present invention will be described.
(A1) First, the crawler crane 12 and the pole trailer 11 are arranged on the chassis 1 on the back surface of the abutment 2.
(A2) Next, the PC girder 4 on the pole trailer 11 is installed between the first supports ( between the abutment 2 and the pier 3) by the crawler crane 12.
(A3) Next, the side scaffolding 7 and the protective fence 8 are provided on the installed PC girder 4.
(A4) Next, the H-section steel 5 is installed on the upper part of the installed PC girder 4 and fixed to the PC girder 4 with the anchor bolt 6.
(A5) Next, the work gantry is installed by installing the lining plate 10 on the H-shaped steel 5. Next, temporary tension of PC girder 4 is performed.
(A6) Next, the crawler crane 12 is disposed on the lining plate 10.

以後、作業構台の上から次に架設する支承間において、(A2)〜(A6)と同様の手順を行う。なお、図1に示すように、クローラークレーン12の進行に合わせてポールトレーラー11も覆工板10上に進める。以上の手順を繰り返すことにより、全支承間にPC桁4の架設を行う。 Thereafter, the same procedure as (A2) to (A6) is performed between the supports to be installed next from the work gantry . As shown in FIG. 1, the pole trailer 11 is also advanced on the lining plate 10 as the crawler crane 12 advances. By repeating the above procedure, the PC girder 4 is installed between all the supports .

支承間の架設が終了した後、ポールトレーラー11及びクローラークレーン12を橋上より移動させながら、覆工板10及びH形鋼5を順次撤去する。
次に、橋台2に最も近い支承間から複数の支承間(例えば2支承間)において、同時に第2工程を実施する。すなわち、側部足場7上で以下の(B1)〜(B2)の作業を並行して行う。
(B1) 架設した複数のPC桁4の横間の隙間へコンクリートを打設し養生する。
(B2) 架設した複数のPC桁4に鋼線を通し、横締緊張工・横締グラウト工を行い定着させ養生する。
After the construction between all the supports is completed, the lining plate 10 and the H-section steel 5 are sequentially removed while moving the pole trailer 11 and the crawler crane 12 from the bridge.
Next, among a plurality of bearing from between the nearest bearing to the abutment 2 in (e.g. between two bearing), carrying out the second step at the same time. That is, the following operations (B1) to (B2) are performed in parallel on the side scaffold 7.
(B1) Concrete is placed and cured in the gaps between the plurality of PC girders 4 installed .
(B2) A steel wire is passed through the plurality of PC girders 4 installed, and a horizontal tightening work and a horizontal tightening grout work are carried out and fixed.

以後、同様にして、PC桁4の既設部分すべてに(B1)〜(B2)の作業を行う。
以上により、橋桁の架設が終了する。
Thereafter, similarly, the operations (B1) to (B2) are performed on all the existing portions of the PC beam 4.
This completes the construction of the bridge girder.

このように、本発明に係る橋桁の架設方法によれば、PC桁4を先行して架設するため、養生による待ち期間を短縮でき、工期を大幅に短縮することができる。
また、第2工程において、複数支承間を同時に施工することが可能となるため、短期間で橋桁を架設することができる。
Thus, according to the bridge girder construction method according to the present invention, since the PC girder 4 is constructed in advance, the waiting period for curing can be shortened, and the construction period can be greatly shortened.
Moreover, since it becomes possible to construct between several bearings simultaneously in a 2nd process, a bridge girder can be constructed in a short period of time.

なお、以上の実施形態においては、一方の橋台2側からPC桁4の架設を開始したが、本発明はこれに限らず、両端部の橋台2からPC桁4の架設を開始してもよい。   In the above embodiment, the construction of the PC girder 4 is started from one abutment 2 side. However, the present invention is not limited to this, and the construction of the PC girder 4 may be started from the abutment 2 at both ends. .

1 躯体
2 橋台
3 橋脚
4 PC桁
5 H形鋼
6 アンカーボルト
7 側部足場
8、9 防護柵
10 覆工板
11 ポールトレーラー
12 クローラークレーン
DESCRIPTION OF SYMBOLS 1 Frame 2 Abutment 3 Bridge pier 4 PC girder 5 H-shaped steel 6 Anchor bolt 7 Side scaffolding 8, 9 Guard fence 10 Covering plate 11 Pole trailer 12 Crawler crane

Claims (5)

支承間に複数のPC桁を架設し、架設した前記PC桁に足場及び防護柵を設ける第1工程と、
前記架設した複数のPC桁の横間の隙間へコンクリートを打設するとともに、前記架設した複数のPC桁に鋼線を横締緊張し、定着させる第2工程と、を有する橋桁の架設方法であって、
支承間で前記第1工程を行った後、前記第2工程を開始する前に、前記架設したPC桁上への作業構台の設置、前記架設したPC桁に仮緊張を行ってから、前記作業構台の上から次に架設する支承間で前記第1工程を行うことを特徴とする橋桁の架設方法。
A first step in which a plurality of PC girders are installed between the supports, and a scaffold and a protective fence are provided on the installed PC girders;
A method of laying a bridge girder having a second step of placing concrete in gaps between the plurality of PC girders installed and laterally tightening and fixing steel wires to the plurality of PC girders installed There,
After performing the first step between the bearings and before starting the second step, the work gantry is installed on the installed PC girder and the tension is applied to the installed PC girder. A bridge girder erection method characterized in that the first step is performed between the supports to be erected next from above the gantry .
前記作業構台の設置は、前記架設したPC桁の上部にH形鋼を固定し覆工板で覆うことにより行うことを特徴とする請求項1に記載の橋桁の架設方法。 2. The bridge girder erection method according to claim 1, wherein the work gantry is installed by fixing an H-shaped steel to the upper part of the erected PC girder and covering it with a lining plate. 前記第1工程が完了した支承間の前記覆工板の上部にクローラークレーンを配置し、
前記クローラークレーンにより次の支承間にPC桁を架設することを特徴とする請求項2に記載の橋桁の架設方法。
Place a crawler crane on top of the lining plate between the bearings where the first step is completed ,
The bridge girder erection method according to claim 2, wherein a PC girder is constructed between the next supports by the crawler crane.
前記クローラークレーンが配置された支承間よりも先に前記第1工程が完了した支承間の前記覆工板の上部にポールトレーラーを配置し、
前記ポールトレーラーにより未設のPC桁を前記クローラークレーンに供給することを特徴とする請求項3に記載の橋桁の架設方法。
Placing a pole trailer on top of the lining plate between the bearings where the first step has been completed prior to between the bearings where the crawler crane is located;
4. The bridge girder erection method according to claim 3, wherein an unsettled PC girder is supplied to the crawler crane by the pole trailer.
前記第2工程を複数支承間同時に行うことを特徴とする請求項1〜4のいずれか一項に記載の橋桁の架設方法。 The bridge girder construction method according to any one of claims 1 to 4, wherein the second step is performed simultaneously between a plurality of bearings .
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CN102877417B (en) * 2012-10-26 2014-12-03 中铁上海设计院集团有限公司 Anchoring method of girder suspender of continuous camber composite bridge
JP6460682B2 (en) * 2014-08-29 2019-01-30 大成建設株式会社 Temporary scaffolding unit and temporary pier
CN113931077A (en) * 2021-11-25 2022-01-14 中国能源建设集团安徽电力建设第一工程有限公司 Construction method for erecting prefabricated box girder bridge girder erection machine in limited construction space

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JP2007077630A (en) * 2005-09-13 2007-03-29 Oriental Construction Co Ltd Continuous girder using precast main-girder segment, and its erection method

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CN110230259A (en) * 2018-08-21 2019-09-13 中铁十八局集团有限公司 A kind of pier top beam section that bridge cantilever pours and its rapid constructing method
CN110230259B (en) * 2018-08-21 2021-05-28 中铁十八局集团有限公司 Bridge cantilever casting pier top beam section and rapid construction method thereof

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