JP2011174241A - Method for laying floor slab onto bridge girder - Google Patents

Method for laying floor slab onto bridge girder Download PDF

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JP2011174241A
JP2011174241A JP2010037250A JP2010037250A JP2011174241A JP 2011174241 A JP2011174241 A JP 2011174241A JP 2010037250 A JP2010037250 A JP 2010037250A JP 2010037250 A JP2010037250 A JP 2010037250A JP 2011174241 A JP2011174241 A JP 2011174241A
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floor slab
bridge girder
bridge
carriage
floor
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JP4956634B2 (en
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Yasuhide Koikeda
康秀 小池田
Yoshihito Ogawa
良仁 小川
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HOKUTO TEKKO KK
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HOKUTO TEKKO KK
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Abstract

<P>PROBLEM TO BE SOLVED: To acquire a technical means capable of laying floor slabs on bridge girders without using a large-scale crane in a method for laying the floor slabs on the bridge girders extended over a river or a valley for constructing a bridge. <P>SOLUTION: Rail materials are installed over a plurality of floor slabs fixed to the extended bridge girders in parallel with the bridge girders, and a carriage which travels along the rails is provided. While the floor slab to be newly laid is mounted to the carriage, extension rail materials are installed on the bridge girder at a location at which the floor slab is laid. The carriage to which the new floor slab is mounted is moved on the extension rail materials. A suspending base is installed above the bridge girder through an opening of the bottom plate of the moved floor slab so as to lift the new floor slab by a hoisting attachment of the suspending base. The carriage and the extension rail materials are removed, and the floor slab is suspended to be lowered on the bridge girder. The suspending base is removed, and the floor slab which is suspended and lowered is fixed to the bridge girder. These operations are repeated. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、橋梁の建設において、川や谷の上に架け渡した橋桁の上に床版を敷設する方法に関するものである。   The present invention relates to a method of laying a floor slab on a bridge girder bridged over a river or valley in the construction of a bridge.

橋梁を建設するときは、川や谷の両岸及びその間に設けた橋脚間に形鋼ないしボックス構造の橋桁を架け渡し、その橋桁の上に橋の幅に対応する長さを備えた多数の床版を並べて敷設し、その床版の上にコンクリートの路盤を形成するという作業で建設が行われる。   When constructing a bridge, a bridge girder of a structural steel or box structure is bridged between both banks of rivers and valleys and between the piers between them, and a number of bridges with a length corresponding to the width of the bridge are placed on the bridge girder. Construction is done by laying floor slabs side by side and forming a concrete roadbed on the slabs.

床版は、図６に示すような平面矩形の鋼板製の部材である。図に示す床版１は、平行に架設した２本の橋桁の上に敷設する床版の例である。床版１は、道路幅に相当する長さを備えた細長い矩形形状で、その長手両端は、コンクリートの路盤の側端を成形するべく上方に折れ曲がっている。床版１の上面には、長手方向の剛性を付与するために複数本のリブ１１が溶着されている。   The floor slab is a flat rectangular steel plate member as shown in FIG. A floor slab 1 shown in the figure is an example of a floor slab laid on two bridge girders laid in parallel. The floor slab 1 has an elongated rectangular shape having a length corresponding to the road width, and both longitudinal ends of the floor slab 1 are bent upward to form side edges of a concrete roadbed. A plurality of ribs 11 are welded to the upper surface of the floor slab 1 in order to impart rigidity in the longitudinal direction.

床版１の底板１２は、橋桁２の上の部分のコンクリート路盤厚さが厚くなるように、橋桁２の両側の部分で下方に傾斜している。そして、橋桁２の上面となる部分には、底板１２が設けられておらず、開口している。すなわち、コンクリートの路盤の橋桁２の部分は、橋桁２に直接載っており、橋桁２の間の部分及び橋桁から張り出した部分は、床版の底板１２の上に載っている。   The bottom plate 12 of the floor slab 1 is inclined downward at both sides of the bridge girder 2 so that the thickness of the concrete roadbed on the upper part of the bridge girder 2 is increased. And the bottom plate 12 is not provided in the part used as the upper surface of the bridge girder 2, but it is opening. That is, the portion of the bridge girder 2 of the concrete roadbed is directly placed on the bridge girder 2, and the portion between the bridge girder 2 and the portion protruding from the bridge girder are placed on the bottom plate 12 of the floor slab.

橋桁２の両側の底板１２相互は、リブ１１で連結された状態となっている。床版１の両側辺（橋梁の長手方向の両辺）には、隣接する床版相互を接続する繋ぎ板（スプライスプレート）をボルト止めするための多数のボルト挿通孔（図示せず）が設けられている。   The bottom plates 12 on both sides of the bridge girder 2 are connected to each other by ribs 11. On both sides of the floor slab 1 (both sides in the longitudinal direction of the bridge), a number of bolt insertion holes (not shown) are provided for bolting connecting plates (splice plates) that connect adjacent floor slabs. ing.

床版１は、底板１２の開口の両縁１３を橋桁２の上面に載せた状態で、図７、８に示すように、橋桁２の両側の底板１２相互の間に掛渡された押え材３と、橋桁２の上面に溶着して立設した引張ボルト２１と、この引張ボルトに螺合して押え材３を下方に押し付けるナット２２と、リブ１１に溶着した山形鋼１８に溶着したナット３１と、このナットに螺合した押ボルト３２とで、橋桁２上に定置される。すなわち、橋桁２の上面に植立した引張ボルト２１の上端を橋桁２の両側の底板間に架け渡した押え材３のボルト挿通孔に挿通してナット２２で締め付けることにより、床版１を下方に押し付け、この押し付け力を、リブ１１に溶着されている山形鋼１８に設けたボルト孔の下に溶着したナット３１に螺合した押ボルト３２が橋桁２の上面に当接することにより受止めて、床版１を橋桁２の上に固定している。そして、隣接する既設の床版とは、その側辺相互の間に図示しない繋ぎ板をあてがって床版の底板１２と繋ぎ板とをボルトナットで締結することにより連結している。   As shown in FIGS. 7 and 8, the floor slab 1 is pressed between the bottom plates 12 on both sides of the bridge girder 2 with both edges 13 of the opening of the bottom plate 12 placed on the upper surface of the bridge girder 2. 3, a tension bolt 21 welded and erected on the upper surface of the bridge girder 2, a nut 22 screwed into the tension bolt to press the presser material 3 downward, and a nut welded to the angle steel 18 welded to the rib 11 31 and a push bolt 32 screwed into the nut are placed on the bridge girder 2. That is, the upper end of the tension bolt 21 planted on the upper surface of the bridge girder 2 is inserted into the bolt insertion hole of the presser 3 spanned between the bottom plates on both sides of the bridge girder 2 and tightened with the nut 22, thereby lowering the floor slab 1 downward The pressing force 32 received by the pressing bolt 32 screwed into the nut 31 welded under the bolt hole provided in the angle steel 18 welded to the rib 11 is brought into contact with the upper surface of the bridge girder 2. The floor slab 1 is fixed on the bridge girder 2. And it connects with the existing existing floor slab by attaching the connection board which is not shown in figure between the side edges, and fastening the bottom board 12 and connection board of a floor slab with a volt | bolt nut.

床版の底板１２上及び橋桁２の上面には、コンクリート路盤内の鉄筋と連結する多数のピンが植立されている（図示されていない）。また、橋桁２の上面に立設した引張ボルト２１や押え材３もコンクリート路盤内に埋設される。最終的には橋桁２と床版１及び隣接する床版相互は、打設されたコンクリートの路盤によって強固に連結一体化された構造となる。   On the bottom plate 12 of the floor slab and on the upper surface of the bridge girder 2, a large number of pins connected to the reinforcing bars in the concrete roadbed are planted (not shown). In addition, the tension bolt 21 and the presser material 3 standing on the upper surface of the bridge girder 2 are also embedded in the concrete roadbed. Eventually, the bridge girder 2 and the floor slab 1 and the adjacent floor slabs are firmly connected and integrated by a concrete roadbed.

従来、橋桁２上への床版１の敷設に際しては、床版を順にクレーンで吊り上げて敷設位置に吊り降ろし、吊り降ろされた床版を作業者が順次橋桁に固定してゆくという方法で床版の敷設が行われていた。   Conventionally, when laying the floor slab 1 on the bridge girder 2, the floor slab is lifted by a crane in order and suspended at the laying position, and the floor slab is then fixed to the bridge girder by the operator. Plates were being laid.

床版は、橋梁の道路幅に相当する長さを備えた溶接構造物であり、重量物である。この重量物を川や谷上に架けられた橋桁の上に搬送するには、クレーンを必要とする。クレーンには、最大吊り荷重により表示される種々の大きさのものがあるが、それぞれのクレーンには、吊り荷重の重さに応じた安全作業範囲が定められている。すなわち、クレーンは、真上に吊り上げるときは、最大吊り荷重の吊り荷を吊り上げることができるが、ブームを倒してクレーンの設置位置から離れた位置に吊り荷を搬送しようとすると、吊り上げ可能な吊り荷の重さが急激に低下する。それは、吊り荷がクレーンの設置位置から離れると、吊り荷の荷重及びブームの自重がクレーンを転倒させるモーメントとして作用するためである。   The floor slab is a welded structure having a length corresponding to the road width of the bridge, and is heavy. A crane is required to transport these heavy objects onto bridge girders that are built over rivers and valleys. There are cranes of various sizes indicated by the maximum suspension load, and each crane has a safe work range corresponding to the weight of the suspension load. In other words, when the crane is lifted directly above, it can lift a suspended load with the maximum suspended load. However, if it is attempted to transport the suspended load to a position away from the crane installation position by tilting the boom, it can be lifted. The weight of the load decreases rapidly. This is because when the suspended load is separated from the crane installation position, the load of the suspended load and the own weight of the boom act as a moment for overturning the crane.

従って、橋梁のような水平方向に長い構造物を建設する場合は、吊り荷をクレーンの設置位置から離れた位置まで搬送しなければならないので、搬送物（床版）の重量より遥かに大きな最大吊り荷重のクレーンを用いなければならない。更に、橋が長いときは、大きなクレーンを用いても床版を橋桁の中央にまで搬送することができず、川底や谷底に仮設の基礎を建設して大型のクレーンを設置しなければならない。   Therefore, when constructing a horizontally long structure such as a bridge, the suspended load must be transported to a position distant from the crane installation position, which is much larger than the weight of the transported object (floor slab). A crane with a lifting load must be used. Furthermore, when the bridge is long, even if a large crane is used, the floor slab cannot be transported to the center of the bridge girder, and a large foundation must be installed by constructing a temporary foundation on the riverbed or valley bottom.

このような大型クレーンの使用や設置には多大がコストがかかる。特に山間部での橋梁の建設においては、橋を架けようとするところが深い谷であったり、両岸が急傾斜の斜面であったりして、大型のクレーンの設置が困難である場合が多い。また、設置が可能であったとしても、設置のための仮基礎の建設や分解して現場に搬送したクレーンの組立及び設置に多大な労力とコストを必要とする。   The use and installation of such a large crane is very expensive. Especially in the construction of bridges in mountainous areas, there are many cases where it is difficult to install a large crane because the bridge is a deep valley or both banks are steep slopes. Moreover, even if the installation is possible, a great amount of labor and cost are required to assemble and install the crane that has been constructed and disassembled and then transported to the site.

この発明は、このような問題に鑑みてなされたもので、大型のクレーンを用いることなく、橋桁上への床版の敷設を行うことができる技術手段を得ることを課題としている。   This invention is made in view of such a problem, and makes it a subject to obtain the technical means which can lay the floor slab on a bridge girder, without using a large sized crane.

この発明の橋梁における床版の敷設方法においては、橋桁２の上に固定された既設の床版１のリブ１１の上に定置される複数本のレール材１５と、新たな床版１ａを敷設する箇所に定置される複数本の延長レール材１６と、延長レール材１６を定置された既設のレール材１５と同じ高さで橋桁２上に保持するための台脚１７と、各レール材１５及び延長レール材１６上を自由走行する台車５と、複数の台車５を各レール材及び延長レール材に沿って走行させるウインチなどの駆動装置５１と、橋桁２上に植立した引張ボルト２１に螺合するナットによって橋桁２上に仮固定される複数の吊り台６とを使用する。また、この発明の方法においては、架設する橋梁の少なくとも一方の岸に設置された少なくとも何枚かの床版を当該岸近くの橋桁上に吊り降ろすことができるなクレーンを用いる。   In the method of laying a floor slab in a bridge according to the present invention, a plurality of rail members 15 placed on a rib 11 of an existing floor slab 1 fixed on a bridge girder 2 and a new floor slab 1a are laid. A plurality of extension rail members 16 placed at the place to be mounted, a pedestal 17 for holding the extension rail members 16 on the bridge girder 2 at the same height as the existing rail members 15 placed, and each rail member 15 And a cart 5 that freely travels on the extension rail member 16, a drive device 51 such as a winch that causes the plurality of carts 5 to travel along the rail member and the extension rail member, and a tension bolt 21 that is planted on the bridge girder 2. A plurality of suspension bases 6 that are temporarily fixed on the bridge girder 2 by screwed nuts are used. In the method of the present invention, a crane is used that can suspend at least some floor slabs installed on at least one shore of the bridge to be installed on a bridge girder near the shore.

橋桁２上に敷設した床版１を固定する押え材３及び引張ボルト２１は、リブ１１の上端より下方に位置し、押ボルト３２は、リブ１１の上面上に突出していない。従って、押え材３や引張ボルト２１に邪魔されることなく、レール材１５を既設の床版１上に定置することができる。吊り台６は、レバーチェンブロックや一般的なチェンブロックなどの吊り具６１を備えたものとする。   The presser member 3 and the tension bolt 21 that fix the floor slab 1 laid on the bridge girder 2 are positioned below the upper end of the rib 11, and the presser bolt 32 does not protrude on the upper surface of the rib 11. Therefore, the rail member 15 can be placed on the existing floor slab 1 without being obstructed by the presser member 3 and the tension bolt 21. The suspension base 6 is provided with a suspension tool 61 such as a lever chain block or a general chain block.

この発明の方法による床版の敷設は、次のように行われる。まず、川岸に設置したクレーンでその安全作業範囲内の何枚かの床版１を橋桁２上に従来と同様な方法で敷設する。次に敷設済み床版１のリブ１１上の橋桁２の上方に位置する箇所に、レール材１５を定置する。レール材１５は、少なくとも２本を橋梁の幅方向に離して平行に定置する。橋桁２が２本以上あるときは、両側の橋桁２の上方となる位置に定置し、橋桁２が一本のときは、その両側に定置する。定置したレール材１５の各々に、台車５を載せる。一本のレール材は、台車５が転倒しない幅を有する１本のレールか、又は台車５が転倒しない間隔で設けた２本のレールで形成される。   Laying the floor slab by the method of the present invention is performed as follows. First, several floor slabs 1 within the safe work range are laid on the bridge girder 2 by a crane installed on the riverbank in the same manner as before. Next, the rail material 15 is placed at a position located above the bridge girder 2 on the rib 11 of the floor slab 1 that has been laid. At least two rail members 15 are placed parallel to each other in the width direction of the bridge. When there are two or more bridge girders 2, they are placed at positions above the bridge girders 2 on both sides, and when there is only one bridge girder 2, they are placed on both sides. The carriage 5 is placed on each of the fixed rail members 15. One rail member is formed by one rail having a width that does not cause the carriage 5 to fall, or two rails provided at intervals at which the carriage 5 does not fall.

次に、定置したレール材１５を延長するように、次の床版を敷設する位置の橋桁上に、延長レール材１６を載置する。この延長レール材は、短時間の間のみ設置するものなので、一般的には固定しなくてもよい。次に、台車５をクレーンの安全作業範囲内に移動し、クレーンで次に敷設する床版１ａを台車５上に吊り降ろす。そして、ウインチなどの駆動装置５１で、複数の台車５及びその上に載置された床版１ａを一体として、延長レール材１６上に移動する。   Next, the extended rail member 16 is placed on the bridge girder at the position where the next floor slab is laid so as to extend the fixed rail member 15. Since this extension rail material is installed only for a short time, generally it does not need to be fixed. Next, the carriage 5 is moved within the safe work range of the crane, and the floor slab 1 a to be laid next by the crane is suspended on the carriage 5. Then, the plurality of carriages 5 and the floor slab 1a placed thereon are moved together on the extension rail member 16 by a driving device 51 such as a winch.

前述したように、床版の底板１２は、橋桁２の上方となる部分には設けられていない。そこで次に、延長レール材１６上に移動した床版１の床板が設けられていない開口部分を通して、橋桁２上に吊り台６を仮固定し、その吊り具６１で台車５上から床版１を吊り上げる。吊り台６は、橋桁２に立設されている引張ボルト２１に挿通したナットで締め付けて仮固定することができる。   As described above, the bottom plate 12 of the floor slab is not provided in a portion above the bridge girder 2. Therefore, next, the suspension base 6 is temporarily fixed on the bridge girder 2 through the opening portion of the floor slab 1 that has been moved onto the extension rail member 16 and is not provided with the floor slab 1. Lift up. The suspension stand 6 can be temporarily fixed by tightening with a nut inserted into a tension bolt 21 standing on the bridge girder 2.

この状態で、台車５をレール材１５側に戻し、延長レール材１６を橋桁２上から撤去する。台車５は、１本のレール材ごとに個別に設けられているので、人力で容易に移動することができる。また、一本ごとの延長レール材１６は、長さの短いものであるから、人力で撤去することができる。   In this state, the carriage 5 is returned to the rail member 15 side, and the extension rail member 16 is removed from the bridge girder 2. Since the carriage 5 is individually provided for each rail member, it can be easily moved manually. Moreover, since the extension rail material 16 for every one is a short thing, it can be removed manually.

次に、吊り台の吊り具６１で吊り上げられている床版１ａを橋桁２上に降ろす。そして、吊り降ろされた床版１ａを、従来と同様に、繋ぎ板で既設の床版１の先頭のものと接続し、吊り台６を撤去する。吊り台６は、吊り具６１を取り外し可能にし、更に必要があれば、枠を分解可能な構造とすることにより、人力で撤去することができる。橋桁２上から吊り台６を撤去した後、従来と同様に、リブ１１に溶着されているナット３１に螺合する押ボルト３２と、押え材３に挿通した引張ボルト２１の先端に螺合したナット２２とにより、新たに敷設した床版１ａを橋桁２に固定する。そして、新たに固定した床版のリブの上までレール材１５を延長する。   Next, the floor slab 1a lifted by the lifting tool 61 of the suspension stand is lowered onto the bridge girder 2. Then, the suspended floor slab 1a is connected to the first one of the existing floor slab 1 with a connecting plate, as in the prior art, and the suspension platform 6 is removed. The suspension stand 6 can be removed manually by making the suspension 61 detachable and, if necessary, having a structure in which the frame can be disassembled. After removing the suspension base 6 from the bridge girder 2, as in the conventional case, the suspension bolt 6 is screwed to the end of the tension bolt 21 inserted through the presser member 3 and the presser bolt 32 screwed into the nut 31 welded to the rib 11. The newly installed floor slab 1 a is fixed to the bridge girder 2 with the nut 22. And the rail material 15 is extended on the rib of the newly fixed floor slab.

以上の作業を繰り返すことにより、新たな床版を順次敷設してゆく。   By repeating the above work, new floor slabs will be laid sequentially.

この発明の方法によれば、橋桁上の床版の敷設において、大型クレーンの使用や、クレーンを川底や谷底に設置する必要がなくなる。台車による床版の搬送や延長レール材の設置及び撤去、並びに吊り台の設置及び撤去に従来より多くの人手を必要とするが、大型クレーンを使用する必要がないこと、及び大型クレーンの搬入、組立及び大型クレーンのための仮設基礎の設置及びそれらに必要な人手が不要となるので、橋桁上への床版の敷設作業に要する費用を大幅に低減できる。特に、山間地に建設される橋梁の建設において、橋梁の建設費及び作業負担を大幅に低減できるという効果がある。   According to the method of the present invention, it is not necessary to use a large crane or install the crane on the riverbed or valley bottom in laying the floor slab on the bridge girder. It requires more manpower than before to transport floor slabs with carriages, install and remove extension rails, and install and remove suspension stands, and it is not necessary to use large cranes, Since there is no need to assemble and install temporary foundations for large cranes and the manpower required for them, the cost required for laying the floor slab on the bridge girder can be greatly reduced. In particular, in the construction of a bridge constructed in a mountainous area, there is an effect that the construction cost and work load of the bridge can be significantly reduced.

既設の床版上に設置したレール材上の台車に新たな床版を吊り降ろした状態を示す側面図Side view showing a state in which a new floor slab is suspended from a carriage on a rail material installed on an existing floor slab 吊り降ろした新たな床版をその敷設位置に移動した状態を示す側面図Side view showing a state where a new suspended floor slab has been moved to its laying position 橋桁上に固定した吊り台で新たな床版を吊り上げた状態を示す側面図Side view showing a state where a new floor slab is lifted by a suspension base fixed on a bridge girder 図３の正面図Front view of FIG. 新たな床版を橋桁上に吊り降ろした状態を示す側面図Side view showing a state where a new floor slab is suspended from a bridge girder 床版の斜視図Perspective view of floor slab 図６のＡ部における床版の固定構造を示す拡大正面図The enlarged front view which shows the fixation structure of the floor slab in the A section of FIG. 図６のＢ部における床版の固定構造を示す拡大正面図The enlarged front view which shows the fixation structure of the floor slab in the B section of FIG. レール材の平面図Top view of rail material 同正面図Front view 延長レール材及び台脚の側面Side of extension rail material and base 同正面図Front view 台車の側面図Side view of trolley 吊り台の側面図Side view of suspension platform 同正面図Front view

以下、図面に示す実施例を参照して、この発明を更に説明する。床版１及び１ａは、図６ないし図８で説明した構造で、２本の橋桁２の上に敷設される。図９及び図１０は、この発明の方法に用いるレール材の一実施例を示した図である。図のレール材１５は、上向きのコ字形鋼からなり、両端にボルトやＣクランプなどで既設の床版１のリブ１１上に固定するためのフランジ１４が溶接してある。レール材１５は、既設の床版１上の、２本の橋桁２の上方の位置に互いに平行に設置される。   The present invention will be further described below with reference to embodiments shown in the drawings. The floor slabs 1 and 1a are laid on the two bridge girders 2 in the structure described with reference to FIGS. FIG. 9 and FIG. 10 are views showing an embodiment of a rail material used in the method of the present invention. The rail member 15 shown in the figure is made of upward U-shaped steel, and flanges 14 are fixed to both ends of the rib 11 of the existing floor slab 1 with bolts or C clamps. The rail members 15 are installed in parallel to each other at positions above the two bridge girders 2 on the existing floor slab 1.

図１１及び１２は、延長レール材とその台脚を示した図である。延長レール材１６は、敷設する床版の幅（橋梁の長さ方向の寸法）に相当する長さを備えている。延長レール材１６は、その両端を橋桁２上に定置した台脚１７で支持されて、既設の床版上に定置したレール材１５と同一高さに設置される。図の延長レール材１６は、台脚１７の上面に溶着した２個の位置決め材１９の間に嵌め込んで支持されており、延長レール材１６と台脚１７とは分解可能である。図の例では、延長レール材１６を２本、台脚１７を４個使用する。   11 and 12 are views showing the extension rail member and its pedestal. The extension rail member 16 has a length corresponding to the width of the floor slab to be laid (dimension in the length direction of the bridge). The extension rail member 16 is supported by pedestals 17 that are fixed on the bridge girder 2 at both ends, and is installed at the same height as the rail member 15 that is fixed on the existing floor slab. The extension rail member 16 shown in the drawing is supported by being fitted between two positioning members 19 welded to the upper surface of the base leg 17, and the extension rail member 16 and the base leg 17 can be disassembled. In the illustrated example, two extension rail members 16 and four base legs 17 are used.

図１３は、レール材１５及び延長レール材１６上を走行する台車を示した図である。図の台車５は、レール材１５及び延長レール材１６の上向きのコ字溝内を走行する小型のクローラ５２を前後両端に備えたもので、台車５の台５３は角材で製作され、軽量化及びクレーンで吊り降ろした際の床版１ａの損傷を防止する構造としてある。台車５は、２個準備され、それぞれがレール材１５及び延長レール材１６の１本のコ字溝に案内されて走行する。   FIG. 13 is a view showing a carriage that travels on the rail material 15 and the extension rail material 16. The cart 5 shown in the figure is provided with small crawlers 52 that run in an upward U-shaped groove in the rail material 15 and the extended rail material 16 at both front and rear ends. The cart 53 of the cart 5 is made of square material and is reduced in weight. And it is set as the structure which prevents the damage of the floor slab 1a at the time of hanging down with a crane. Two trolleys 5 are prepared and each travels while being guided by one U-shaped groove of the rail material 15 and the extension rail material 16.

図１４及び１５は、吊り台の例を示した図である。図の吊り台６は、２個の門形枠６２と、その上に架け渡されるビーム６３とを備えている。ビーム６３と門形枠６２とは、Ｃクランプ６４で締結されており、分解及び組立が可能な構造となっている。図の吊り具６１は、ビーム６３に巻回したワイヤで吊り下げられたレバーチェンブロックで、ビーム６３上の任意の位置に取り付けられるようになっている。ビーム６３を門形枠６２の外側に張り出させて、その張り出し位置に取り付けることもできる。   14 and 15 are diagrams showing examples of suspension bases. The suspension platform 6 shown in the figure includes two portal frames 62 and a beam 63 laid over the two portal frames 62. The beam 63 and the portal frame 62 are fastened by a C clamp 64 and have a structure that can be disassembled and assembled. A hanging tool 61 shown in the figure is a lever chain block suspended by a wire wound around a beam 63, and is attached to an arbitrary position on the beam 63. The beam 63 can be extended to the outside of the portal frame 62 and attached to the extended position.

次に図１〜５を参照して、上記構造のレール材１５、延長レール材１６、台車５及び吊り台６並びに台車走行用のウインチ５１と川岸に設置したクレーンとを使用した、この発明の床版の敷設方法の手順を説明する。   Next, referring to FIGS. 1 to 5, the rail material 15, the extended rail material 16, the cart 5 and the suspension platform 6, the cart traveling winch 51 and the crane installed on the river bank are used. The procedure for laying the floor slab is explained.

まず、橋梁を架設した岸に設置したクレーンでその安全作業範囲内の何枚かの床版１を橋桁２上に従来と同様な方法で敷設する。次に敷設済み床版のリブ１１上の橋桁２の上方に位置する箇所に、レール材１５を定置する。レール材１５は、２本の橋桁２の上方の位置に定置する。定置したレール材１５の各々に、個別に台車５を載せる。台車５のクローラ５２は、レール材１５及び延長レール材１６の上向きのコ字溝に嵌り込んだ状態で、レール材１５及び延長レール材１６に沿って個別に走行する。   First, several floor slabs 1 within the safe working range are laid on the bridge girder 2 in the same manner as before with a crane installed on the shore where the bridge is installed. Next, the rail member 15 is placed at a position located above the bridge girder 2 on the rib 11 of the floor slab that has been laid. The rail member 15 is placed at a position above the two bridge beams 2. The carriage 5 is individually mounted on each of the fixed rail members 15. The crawler 52 of the carriage 5 individually travels along the rail material 15 and the extension rail material 16 while being fitted in the upward U-shaped groove of the rail material 15 and the extension rail material 16.

次に、定置したレール材１５を延長するように、次の床版１ａを敷設する位置の橋桁２上に、延長レール材１６を台脚１７で支持して設置する。この延長レール材１６は、短時間の間のみ設置するものなので、一般的には固定しなくてもよい。次に、２台の台車５をクレーンの安全作業範囲内、すなわち岸近くに移動し、クレーンで次に敷設する床版１ａを台車５上に吊り降ろす。図１に示す７１は図示しないクレーンの吊りワイヤ、７２は台車５に連結されているウインチ５１のワイヤである。そして、延長レール材１６の延長上の橋桁２上に固定した電動ウインチ５１で台車５を引張って、複数の台車５及びその上に載置された床版１ａを一体として、延長レール材１６上に移動する（図２）。   Next, the extended rail material 16 is supported and installed by the pedestal 17 on the bridge girder 2 at the position where the next floor slab 1 a is laid so as to extend the fixed rail material 15. Since the extension rail member 16 is installed only for a short time, it is generally not necessary to fix it. Next, the two carts 5 are moved within the safe work range of the crane, that is, near the shore, and the floor slab 1a to be laid next by the crane is suspended on the cart 5. Reference numeral 71 shown in FIG. 1 is a suspension wire of a crane (not shown), and 72 is a wire of a winch 51 connected to the carriage 5. Then, the carriage 5 is pulled by the electric winch 51 fixed on the bridge girder 2 on the extension of the extension rail member 16, and the plurality of carriages 5 and the floor slab 1 a placed thereon are integrated into the extension rail member 16. (Fig. 2).

前述したように、床版１の底板１２は、橋桁２の上方となる部分は開口している。そこで次に、延長レール材１６上に移動した床版１の開口部分を通して、橋桁２上に吊り台６を設置する。図の例では、橋桁２の上面に溶接して立設されている引張ボルト２１を利用して、延長レール材１６の両側に門形枠６２をナットで固定し、その上面にビーム６３を掛渡してＣクランプ６４で固定する。そして、吊り具６１をビーム６３に取り付け、吊り具６１で台車５上から床版１ａを吊り上げる（図３、４）。   As described above, the bottom plate 12 of the floor slab 1 is open at the portion above the bridge girder 2. Therefore, next, the suspension base 6 is installed on the bridge girder 2 through the opening portion of the floor slab 1 moved onto the extension rail member 16. In the example shown in the figure, a gate frame 62 is fixed to both sides of the extension rail member 16 with nuts by using the tension bolts 21 that are welded and erected on the upper surface of the bridge girder 2, and the beam 63 is hung on the upper surface thereof. Pass and fix with C clamp 64. Then, the lifting tool 61 is attached to the beam 63, and the floor slab 1a is lifted from the carriage 5 by the lifting tool 61 (FIGS. 3 and 4).

この状態で、台車５をレール材１５側に戻し、延長レール材１６及び台脚１７を橋桁２上から撤去する。台車５は、１本のレール材ごとに個別に設けられているので、人力で容易に移動することができる。また、一本ごとの延長レール材１６は、長さの短いものであるから、人力で撤去することができる。   In this state, the carriage 5 is returned to the rail member 15 side, and the extension rail member 16 and the base leg 17 are removed from the bridge girder 2. Since the carriage 5 is individually provided for each rail member, it can be easily moved manually. Moreover, since the extension rail material 16 for every one is a short thing, it can be removed manually.

次に、吊り台の吊り具６１で吊り上げられている床版１ａを橋桁２上に降ろす（図５）。そして、吊り降ろされた床版１ａを、従来と同様に、繋ぎ板で既設の床版１の先頭のものと接続し、吊り台６を撤去する。吊り台６は、吊り具６１を取り外し、ビーム６３と門形枠６２を分解して、人力で撤去する。橋桁２上から吊り台６を撤去した後、従来と同様に、リブ１１に溶着されているナット３１に螺合する押ボルト３２と、押え材３に挿通した引張ボルト２１に螺合したナット２２とにより、橋桁２上に固定する。すなわち、引張ボルト２１の張力と押ボルト３２の圧縮力とにより、新たに敷設した床版１ａを橋桁２に固定する。そして、新たに固定した床版１ａのリブの上に、新たにレール材１５ａを設置する。この新たなレール材１５ａは、新たに敷設しようとする床版１に予め定置しておいても良い。   Next, the floor slab 1a lifted by the lifting tool 61 of the suspension stand is lowered onto the bridge girder 2 (FIG. 5). Then, the suspended floor slab 1a is connected to the first one of the existing floor slab 1 with a connecting plate, as in the prior art, and the suspension platform 6 is removed. The suspension base 6 removes the suspension tool 61, disassembles the beam 63 and the gate-shaped frame 62, and removes it manually. After the suspension base 6 is removed from the bridge girder 2, a push bolt 32 that is screwed to the nut 31 welded to the rib 11 and a nut 22 that is screwed to the tension bolt 21 inserted through the presser material 3 are removed as in the conventional case. And fix it on the bridge girder 2. That is, the newly installed floor slab 1 a is fixed to the bridge girder 2 by the tension of the tension bolt 21 and the compressive force of the push bolt 32. And the rail material 15a is newly installed on the rib of the newly fixed floor slab 1a. The new rail material 15a may be previously placed on the floor slab 1 to be newly laid.

以上の作業を繰り返すことにより、新たな床版を順次敷設して、最終的に全ての床版を橋桁２上に敷設する。床版１は、橋桁を架設した岸の片側から反対側の岸に向かって敷設していっても良いし、両側から中央に向かっての敷設していっても良い。後者の場合は、岸の両側にクレーンを設置する。これらのクレーンは、数枚の床版をクレーンの近くに敷設できる程度の安全作業範囲を持ったもので良い。   By repeating the above operations, new floor slabs are sequentially laid and finally all floor slabs are laid on the bridge girder 2. The floor slab 1 may be laid from one side of the shore on which the bridge girder is erected toward the opposite shore, or from both sides toward the center. In the latter case, cranes will be installed on both sides of the shore. These cranes may have a safe working range that allows several floor slabs to be laid near the crane.

１ 床版
１ａ 新たな床版
２ 橋桁
３ 押え材
５ 台車
６ 吊り台
１１ 床版のリブ
１２ 床版の底板
１５ レール材
１６ 延長レール材
１７ 台脚
６１ 吊り具 DESCRIPTION OF SYMBOLS 1 Floor slab 1a New floor slab 2 Bridge girder 3 Holding material 5 Cart 6 Suspension stand 11 Floor slab rib 12 Floor slab bottom plate 15 Rail material 16 Extension rail material 17 Base 61

Claims (1)

架設された橋桁(2)上に固定した複数枚の床版(1)の上に橋桁(2)と平行にレール材(15)を設置して当該レールに沿って走行する台車(5)を設けた後、
前記床版(1)に連接して敷設する新たな床版(1a)を台車(5)に搭載すると共に当該新たな床版を敷設する箇所の橋桁(2)上にレール材(15)と連接する延長レール材(16)を設置し、新たな床版(1a)を搭載した台車(5)を延長レール材(16)上に移動し、移動した床版(1a)の底板(12)の開口を通して橋桁(2)上に吊り台(6)を設置して当該吊り台の吊り具(61)で新たな床版(1a)を吊り上げ、台車(5)と延長レール材(16)とを吊り上げた床版の下から撤去して当該床版を橋桁(2)上に吊り降ろし、吊り台(6)を撤去して吊り降ろした床版(1a)を橋桁(2)に固定する、橋桁上への床版の敷設方法。 Install a rail material (15) parallel to the bridge girder (2) on a plurality of floor slabs (1) fixed on the installed bridge girder (2), and move the carriage (5) traveling along the rail. After providing
A new floor slab (1a) connected to the floor slab (1) is mounted on the carriage (5) and a rail material (15) is placed on the bridge girder (2) where the new floor slab is laid. Install the extension rail material (16) to be connected, move the carriage (5) equipped with the new floor slab (1a) onto the extension rail material (16), and move the bottom plate (12) of the moved floor slab (1a) A suspension base (6) is installed on the bridge girder (2) through the opening of the bridge, and a new floor slab (1a) is lifted by a suspension tool (61) of the suspension base, and the carriage (5) and the extension rail material (16) Is removed from under the floor slab, and the floor slab is suspended on the bridge girder (2). Laying slabs on bridge girders.
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WO2014193020A1 (en) * 2013-05-30 2014-12-04 Kim Tae Hee Incremental launching method for concrete bridge using transport carts and winch
JP2015169029A (en) * 2014-03-10 2015-09-28 株式会社巴コーポレーション Laying method of bridge floor plate and its device
JP2018104972A (en) * 2016-12-26 2018-07-05 株式会社Ｉｈｉインフラシステム Floor slab erection method and floor slab erection device
JP2019210755A (en) * 2018-06-07 2019-12-12 鹿島建設株式会社 Floor slab erection method
JP2020002563A (en) * 2018-06-26 2020-01-09 鹿島建設株式会社 Deck slab construction method

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JP2003049407A (en) * 2001-08-07 2003-02-21 Nkk Corp Bridge and its construction method

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JPS53644A (en) * 1976-06-24 1978-01-06 Ishikawajima Tekko Kensetsu Erection method of unit slab in bridge erection construction work and crane for erection
JP2003049407A (en) * 2001-08-07 2003-02-21 Nkk Corp Bridge and its construction method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014193020A1 (en) * 2013-05-30 2014-12-04 Kim Tae Hee Incremental launching method for concrete bridge using transport carts and winch
JP2015169029A (en) * 2014-03-10 2015-09-28 株式会社巴コーポレーション Laying method of bridge floor plate and its device
JP2018104972A (en) * 2016-12-26 2018-07-05 株式会社Ｉｈｉインフラシステム Floor slab erection method and floor slab erection device
JP2019210755A (en) * 2018-06-07 2019-12-12 鹿島建設株式会社 Floor slab erection method
JP7042696B2 (en) 2018-06-07 2022-03-28 鹿島建設株式会社 Deck erection method
JP2020002563A (en) * 2018-06-26 2020-01-09 鹿島建設株式会社 Deck slab construction method
JP7042706B2 (en) 2018-06-26 2022-03-28 鹿島建設株式会社 Deck erection method

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