JP7466368B2 - Deck replacement method - Google Patents
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- JP7466368B2 JP7466368B2 JP2020078864A JP2020078864A JP7466368B2 JP 7466368 B2 JP7466368 B2 JP 7466368B2 JP 2020078864 A JP2020078864 A JP 2020078864A JP 2020078864 A JP2020078864 A JP 2020078864A JP 7466368 B2 JP7466368 B2 JP 7466368B2
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- 238000000034 method Methods 0.000 title claims description 51
- 239000000725 suspension Substances 0.000 claims description 21
- 238000011900 installation process Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 description 12
- 238000010276 construction Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
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Description
本発明は、既設の橋梁などにおいて床版の架け替え（既設床版の撤去とこれに替わる新設床版の設置）を行う際の床版架け替え方法に関する。 This invention relates to a method for replacing decks on existing bridges and other structures (removing the existing deck and installing a new one in its place).
床版は、プレキャストコンクリート製で、橋梁において主桁（橋桁）上に並べられて路面の基礎をなしている。
かかる床版については、長年の使用による内部の鉄筋の腐食などの理由で、架け替え（既設床版の撤去と新設床版の設置）が求められる場合がある。
The deck slabs are made of precast concrete and are laid on top of the girders of the bridge to form the foundation of the road surface.
Such decks may need to be replaced (removal of the existing deck and installation of a new one) due to reasons such as corrosion of the internal reinforcing bars after years of use.
従来の床版架け替え方法としては、特許文献１に記載の方法が知られている。
ここで用いられる床版架け替え機は、橋軸方向前後の門型フレームを連結してなり前後の門型フレームで床版架け替え位置を跨ぐ自走式の門型構造体と、門型構造体の天井部に沿って並列に配設される２組のレールと、各レールに懸架されて移動可能な第１及び第２の吊上装置（チェーンブロック）と、を備える。
A method described in Patent Document 1 is known as a conventional deck replacement method.
The deck replacement machine used here comprises a self-propelled gate structure formed by connecting front and rear gate frames in the bridge axis direction, with the front and rear gate frames spanning the deck replacement position, two sets of rails arranged in parallel along the ceiling of the gate structure, and first and second lifting devices (chain blocks) suspended on each rail and movable.
第１の吊上装置は新設床版の搬入・設置用、第２の吊上装置は既設床版の撤去・搬出用であり、これらは、床版を吊り上げた状態で、橋軸方向で互いに反対方向にすれ違うことができる。
また、トレーラなどの運搬車両が、新設床版の搬入、及び、既設床版の搬出に用いられる。
The first lifting device is for transporting and installing the new deck slab, and the second lifting device is for removing and transporting the existing deck slab, and these devices can pass each other in opposite directions in the bridge axis direction while lifting the deck slab.
In addition, transport vehicles such as trailers are used to bring in the new deck slab and to transport the existing deck slab.
上記の床版架け替え機を用いた床版架け替え方法では、第１の吊上装置による新設床版の搬入位置（トレーラからの吊り上げ位置）から架け替え位置（新設床版の吊り下ろし設置位置）への移送と、第２の吊上装置による既設床版の架け替え位置（既設床版の吊り上げ撤去位置）から搬出位置（トレーラへの吊り下ろし位置）への移送とを同時に行うことが可能となり、新設床版の搬入・設置と、既設床版の撤去・搬出を並行して行うことができる。 In the deck replacement method using the above deck replacement machine, it is possible to simultaneously transport the new deck from the delivery position (the position where it is lifted from the trailer) to the replacement position (the position where the new deck is lowered and installed) using the first lifting device, and to transport the existing deck from the replacement position (the position where the existing deck is lifted and removed) to the removal position (the position where it is lowered onto the trailer) using the second lifting device, so that the delivery and installation of the new deck and the removal and removal of the existing deck can be performed in parallel.
特許文献１に記載の床版架け替え方法では、床版架け替え機が床版架設位置を跨ぐようになり、一方の門型フレームは撤去前の既設床版上に載るが、他方の門型フレームは設置直後の新設床版上に載ることになる。
従って、設置直後の新設床版に大きな負荷をかけることになる。
In the deck replacement method described in Patent Document 1, the deck replacement machine straddles the deck installation position, and one of the gate-shaped frames is placed on the existing deck before removal, while the other gate-shaped frame is placed on the new deck immediately after installation.
This means that a large load will be placed on the newly constructed deck immediately after installation.
一般に、プレキャストコンクリート製の床版は、床版間に予め定められた隙間をあけて設置し、この隙間には、両床版から内部の鉄筋（定着用の継手）が突出している。従って、この隙間に間詰めコンクリート（モルタル）を打設することで、完成する。
このため、設置直後の床版は、未完成状態であり、これに床版架け替え機の荷重をかけることが好ましくない場合がある。
Generally, precast concrete decks are installed with a predetermined gap between them, and the internal reinforcing bars (anchoring joints) protrude from both decks into the gap. Therefore, the deck is completed by pouring concrete (mortar) into the gap.
For this reason, the deck immediately after installation is in an unfinished state, and it may not be desirable to apply the load of the deck replacement machine to it.
また、特許文献１に記載の床版架け替え方法では、１台の床版架け替え機に、２台の吊上装置が必要で、しかもすれ違いを可能とする必要があることから、床版架け替え機の構成が複雑になるという問題点もあった。 In addition, the deck replacement method described in Patent Document 1 requires two lifting devices for one deck replacement machine, and they also need to be able to pass each other, which creates the problem of a complex configuration for the deck replacement machine.
本発明は、このような実状に鑑み、設置直後の新設床版に負荷をかけることなく、しかも比較的簡単な構成で実施可能な、床版架け替え方法を提供することを課題とする。 In view of the above situation, the present invention aims to provide a method for replacing decks that does not place a load on the newly installed deck immediately after installation and that can be implemented with a relatively simple configuration.
本発明に係る床版架け替え方法は、床版を揚重して移動可能な揚重移動機を用いて、床版の列に対し一の進行方向に順次架け替え作業を行う床版架け替え方法であって、
前記揚重移動機は、既設床版の列上を移動するとともに、前記揚重移動機から前記架け替え作業の進行方向と反対方向に張り出した位置に吊り点を有し、
前記架け替え作業は、
（１）前記揚重移動機により、既設床版を吊り上げて撤去する既設床版撤去工程と、
（２）前記揚重移動機が既設床版を吊り上げて前記架け替え作業の進行方向に移動し、既設床版搬出用の運搬車両が前記揚重移動機の前記吊り点の下方に位置し、その後、前記揚重移動機が既設床版を前記既設床版搬出用の運搬車両に吊り下ろして、前記既設床版搬出用の運搬車両に既設床版を載せて退出させる既設床版搬出工程と、
（３）新設床版搬入用の運搬車両が前記揚重移動機の前記吊り点の下方に位置し、その後、前記揚重移動機が前記新設床版搬入用の運搬車両から新設床版を吊り上げて、その後、前記新設床版搬入用の運搬車両を退出させる新設床版搬入工程と、
（４）前記揚重移動機が前記架け替え作業の進行方向と反対方向に移動して、新設床版を吊り下ろして設置する新設床版設置工程と、
を含む。
本発明に係る床版架け替え方法では、前記新設床版搬入工程にて前記新設床版搬入用の運搬車両を退出させた後、該運搬車両を既設床版の列上における前記揚重移動機よりも前記架け替え作業の進行方向前方で待機させ、前記待機させている運搬車両を、次の前記架け替え作業における前記既設床版搬出工程にて、前記既設床版搬出用の運搬車両として用いる。前記揚重移動機は、左右の接地部で既設床版の列上に支持されて、左右の接地部間に前記運搬車両が通り抜けることができる空間を有する。前記既設床版搬出工程及び／又は前記新設床版搬入工程において、前記運搬車両が前記揚重移動機の前記吊り点の下方へ進入する際に、前記運搬車両が、前記揚重移動機の左右の接地部間の前記空間を通って移動する。
The deck replacement method according to the present invention is a deck replacement method in which a lifting and moving machine capable of lifting and moving a deck is used to perform replacement work sequentially in one traveling direction for a row of decks,
The lifting and moving machine moves on the row of existing decks and has a suspension point at a position protruding from the lifting and moving machine in a direction opposite to the proceeding direction of the replacement work,
The replacement work is as follows:
(1) an existing deck removal process in which the existing deck is lifted and removed by the lifting and moving machine;
(2) an existing deck removal process in which the lifting and moving machine lifts the existing deck and moves in the direction of travel of the replacement work, a transport vehicle for transporting the existing deck is positioned below the hanging point of the lifting and moving machine, and then the lifting and moving machine hoists the existing deck onto the transport vehicle for transporting the existing deck, and the transport vehicle for transporting the existing deck is loaded with the existing deck and removed;
(3) A new deck delivery process in which a transport vehicle for new deck delivery is positioned below the hanging point of the lifting machine, and then the lifting machine lifts the new deck from the transport vehicle for new deck delivery, and then the transport vehicle for new deck delivery exits;
(4) a new deck installation process in which the lifting and moving machine moves in a direction opposite to the proceeding direction of the replacement work to suspend and install a new deck;
including.
In the deck replacement method according to the present invention, after the transport vehicle for the new deck delivery is withdrawn in the new deck delivery step, the transport vehicle is made to wait ahead of the lifting and moving machine on the row of existing decks in the direction of travel of the replacement work, and the waiting transport vehicle is used as the transport vehicle for the existing deck delivery step in the next replacement work. The lifting and moving machine is supported on the row of existing decks at left and right grounding parts, and has a space between the left and right grounding parts through which the transport vehicle can pass. In the existing deck delivery step and/or the new deck delivery step, when the transport vehicle enters below the hanging point of the lifting and moving machine, the transport vehicle moves through the space between the left and right grounding parts of the lifting and moving machine.
本発明によれば、揚重移動機は、既設床版上を移動するだけであり、揚重移動機が新設床版に負荷をかけることは無い。
また、基本的に、１台の揚重移動機で実施でき、しかも吊り点は１つで、その吊り点を揚重移動機に対し相対移動させる必要もないので、簡単な構成で実施でき、コスト等の低減を図ることができる。
According to the present invention, the lifting machine only moves on the existing deck, and does not apply a load to the newly constructed deck.
In addition, basically, it can be implemented with one lifting and moving machine, and there is only one suspension point, and there is no need to move the suspension point relative to the lifting and moving machine, so it can be implemented with a simple configuration and costs, etc. can be reduced.
以下、本発明の実施の形態について、詳細に説明する。
図１は本発明の一実施形態として床版架け替え対象の橋梁の工事例を示す正面図である。また、図２は同上の工事例の（ａ）平面図及び（ｂ）側面図である。
Hereinafter, an embodiment of the present invention will be described in detail.
Fig. 1 is a front view showing an example of bridge construction work to be performed on a bridge deck according to an embodiment of the present invention, and Fig. 2 is (a) a plan view and (b) a side view of the same construction work.
床版の架け替えによる橋梁の再構築については、供用中の道路を対象とするものであるため、工事に伴う交通規制等によるソーシャルロスを最小限にすることが最重要課題となる。このため、本実施形態での床版の架け替えは、いわゆる「半断面施工」としている。 When rebuilding a bridge by replacing the deck, the most important issue is minimizing social loss caused by traffic restrictions and other factors associated with the construction, since the target is a road that is in use. For this reason, the deck replacement in this embodiment is referred to as "half-section construction."
すなわち、床版架け替え対象の橋梁が、４本並列に設けられるＨ形鋼からなる主桁（橋桁）１上に、床版２を２列に並べて、２車線Ａ、Ｂを構成している場合に、片側ずつ、例えば先に車線Ａの床版架け替え工事を行い、この間、車線Ｂの一般車両の通行を可能とする。この場合、中間（車線Ｂの床版の端部上）に仮設防護柵３を設置する。 In other words, if the bridge to be replaced has two lanes A and B, with the deck 2 arranged in two rows on the main girder (bridge girder) 1 made of four parallel H-shaped steel beams, the deck replacement work is carried out on one side at a time, for example, lane A first, while general vehicles are allowed to pass on lane B during this time. In this case, a temporary protective fence 3 is installed in the middle (on the end of the deck of lane B).
図２はまた、本発明の一実施形態として１台の揚重移動機による床版架け替え作業の基本パターンを示している。
すなわち、床版を揚重して移動可能な揚重移動機１０を用いて、床版の列に対し一の進行方向（図２の矢印方向）に順次架け替え作業を行う。言い換えれば、床版架け替えエリア（既設床版の列）の一端部から他端部に向かって、順次架け替え作業を行う。
FIG. 2 also shows a basic pattern of a deck replacement operation using one lifting and moving machine as one embodiment of the present invention.
That is, the lifting and moving machine 10 capable of lifting and moving the deck slabs is used to perform the replacement work for the row of deck slabs in one moving direction (the direction of the arrow in FIG. 2 ). In other words, the replacement work is performed sequentially from one end of the deck slab replacement area (row of existing deck slabs) to the other end.
また、床版架け替え作業の進行方向（図２の矢印方向）が揚重移動機１０の基本的な移動方向となる。従って、揚重移動機１０が図２で左側に進むことを前進といい、逆に右側に進むことを後退という。また、揚重移動機１０の図２で左側が前方、図２で右側が後方となる。 The direction in which the deck replacement work proceeds (the direction of the arrow in Figure 2) is the basic direction of movement of the lifting machine 10. Therefore, when the lifting machine 10 moves to the left in Figure 2, it is called moving forward, and when it moves to the right, it is called moving backward. Also, the left side of the lifting machine 10 in Figure 2 is the front, and the right side in Figure 2 is the rear.
また、トレーラあるいはトラックなどの運搬車両２０を用いて、揚重移動機１０が撤去した既設床版の搬出、及び、揚重移動機１０が設置する新設床版の搬入を行う。
この場合、運搬車両２０は、車線Ａの床版架け替え作業の間、既設床版の搬出、及び、新設床版の搬入のために、供用中の車線Ｂを走行することができる。
In addition, a transport vehicle 20 such as a trailer or truck is used to transport the existing deck removed by the lifting and moving machine 10 and to transport the new deck to be installed by the lifting and moving machine 10 .
In this case, during the deck replacement work on lane A, the transport vehicle 20 can travel on lane B, which is in use, to transport the existing deck and to transport the new deck.
次に、本実施形態において床版架け替え作業に用いる揚重移動機１０及び運搬車両２０について、図１及び図２により、更に詳しく説明する。 Next, the lifting and moving machine 10 and the transport vehicle 20 used in the deck replacement work in this embodiment will be described in more detail with reference to Figures 1 and 2.
揚重移動機１０は、その本体が門型構造であり、左右の接地部（１２）で既設床版２上に支持され、左右の接地部間に運搬車両２０が通り抜けることができる空間１３を有している。 The lifting and moving machine 10 has a gate-shaped main body, is supported on the existing deck 2 by left and right ground contact parts (12), and has a space 13 between the left and right ground contact parts through which the transport vehicle 20 can pass.
前記左右の接地部は、本実施形態では、車輪１２により構成されている。これにより、接地部で走行でき、接地部が走行部を兼ねることができる。 In this embodiment, the left and right ground contact parts are formed by wheels 12. This allows the vehicle to run on the ground contact parts, and the ground contact parts can also serve as running parts.
また、本実施形態での車輪１２は、軌道輪であり、既設床版２の列上に鋼製枕木（図示省略）を介して敷設された一対のレール１１上を走行する。このように軌道輪とすることで、架け替え作業の際の揚重移動機１０の位置、及び、通り抜け用の空間１３の位置を安定させることができる。
但し、車輪１２をタイヤ式として、レール敷設作業を不要とすることを妨げるものではない。
The wheels 12 in this embodiment are raceways and run on a pair of rails 11 laid via steel sleepers (not shown) on the row of the existing deck 2. By using raceways in this way, the position of the lifting machine 10 and the position of the passage space 13 during replacement work can be stabilized.
However, this does not prevent the wheels 12 from being tire-type, thereby eliminating the need for rail laying work.
揚重移動機１０はまた、既設床版２の列上を移動するとともに、揚重移動機１０の本体から床版架け替え作業の進行方向と反対方向（後方）に張り出した位置に吊り点（吊り装置１５）を有する。
従って、揚重移動機１０は、その本体の上部に支持されて後方へ張り出す桁１４と、桁１４の先端側に設けられた吊り装置１５とを含む。
The lifting machine 10 also moves over the row of existing deck slabs 2 and has a suspension point (suspension device 15) at a position extending from the main body of the lifting machine 10 in the opposite direction (rearward) to the progress of the deck replacement work.
Therefore, the lifting machine 10 includes a girder 14 supported on the upper part of the main body and extending rearward, and a suspension device 15 provided on the tip side of the girder 14.
吊り装置１５は、少なくともシーブ又はワイヤ繰り出し部を含み、ウインチなどの動力部は吊り装置１５とシーブ等を介して連動する。 The lifting device 15 includes at least a sheave or wire payout section, and a power section such as a winch is linked to the lifting device 15 via a sheave or the like.
吊り装置１５は、既設床版を撤去のために吊り上げること、撤去した既設床版を搬出用の運搬車両に吊り下ろすこと、新設床版を搬入用の運搬車両から吊り上げること、及び、新設床版を設置のために吊り下ろすことが可能である。 The lifting device 15 can lift the existing deck for removal, hoist the removed existing deck onto a transport vehicle for removal, lift the new deck from the transport vehicle for delivery, and hoist the new deck for installation.
ここにおいて、吊り装置１５は桁１４により支持され、桁１４は揚重移動機１０の後方に張り出しているため、吊り装置１５を前後に移動させることなく、上記の吊り上げ・吊り下ろし作業が可能となる。 Here, the lifting device 15 is supported by the girder 14, which extends to the rear of the lifting mobile machine 10, making it possible to perform the above-mentioned lifting and lowering operations without moving the lifting device 15 back and forth.
運搬車両２０としては、タイヤ式のトレーラあるいはトラックなどを用いる。従って、一般道路を走行することができる。
但し、専用の台車を用いることを妨げるものではない。
The transport vehicle 20 may be a tire-type trailer or a truck, etc., and may therefore be capable of traveling on public roads.
However, this does not preclude the use of a dedicated trolley.
次に本実施形態での床版架け替え作業の手順を図３及び図４により説明する。
図３は床版架け替え作業の手順を示す側面図、図４は同上の床版架け替え作業の手順を示す平面図である。なお、図３の（ａ）～（ｈ）と図４の（ａ）～（ｈ）は互いに対応している。また、図３及び図４では説明の簡略化のためレール１１の図示を省略した。また、既設床版２に対し、新設床版には「２Ｎ」の符号を付した。
Next, the procedure for replacing the deck in this embodiment will be described with reference to Figs.
Figure 3 is a side view showing the procedure for replacing the deck, and Figure 4 is a plan view showing the procedure for replacing the deck. Note that (a) to (h) in Figure 3 correspond to (a) to (h) in Figure 4. Also, in Figures 3 and 4, the rails 11 are omitted for simplicity of explanation. Also, the new deck is marked with the symbol "2N" in comparison with the existing deck 2.
また、図３及び図４では、床版架け替え作業は、右端から左方向に進行する。従って、図３及び図４における現在の床版架け替え位置より右側には、主桁１上に設置済みの新設床版２Ｎがあり、左側には撤去前の既設床版２が存在している。そして、最新に設置された新設床版２Ｎに隣接する位置から既設床版２が撤去され、これに替えて新設床版２Ｎが設置されることになる。 In addition, in Figures 3 and 4, the deck replacement work progresses from the right end to the left. Therefore, to the right of the current deck replacement position in Figures 3 and 4 is the new deck 2N that has already been installed on the main girder 1, and to the left is the existing deck 2 before removal. Then, the existing deck 2 will be removed from the position adjacent to the most recently installed new deck 2N, and the new deck 2N will be installed in its place.
図３（ａ）及び図４（ａ）では、揚重移動機１０は、既設床版の撤去位置、すなわち、床版架け替え位置に近接する既設床版２上で、吊り点（吊り装置１５）が床版架け替え位置の上方にくる位置に移動している。 In Figures 3(a) and 4(a), the lifting machine 10 has moved to a position where the suspension point (suspension device 15) is above the deck replacement position on the existing deck 2, which is close to the existing deck removal position, i.e., the deck replacement position.
揚重移動機１０は、かかる既設床版の撤去位置で、既設床版２を主桁１上から吊り上げて、撤去する。
このとき、既設床版搬出用の運搬車両２０は、空荷で、揚重移動機１０の前方（図で左方）に待機している。
The lifting mobile machine 10 lifts the existing deck 2 from above the main girder 1 at the removal position of the existing deck, and removes it.
At this time, the transport vehicle 20 for carrying out the existing deck is empty and waiting in front of the lifting/moving machine 10 (to the left in the figure).
図３（ａ）及び図４（ａ）の工程が、揚重移動機１０により、既設床版２を吊り上げて撤去する、既設床版撤去工程に相当する。 The steps in Figures 3(a) and 4(a) correspond to the existing deck removal step, in which the existing deck 2 is lifted and removed by the lifting machine 10.
次に、図３（ｂ）及び図４（ｂ）に示すように、揚重移動機１０が撤去した既設床版２を吊り上げたまま前方へ受渡し位置まで移動する。運搬車両２０は、揚重移動機１０の下（通り抜け用の空間）を通って、揚重移動機１０の後方（吊り点の下方）へ進入、位置する。
そして、揚重移動機１０が撤去した既設床版２を運搬車両２０の荷台に吊り下ろす。この吊り下ろしの際に、人力等により、介錯ロープを用いるなどして、既設床版２を９０°回転させ、既設床版２の長手方向を橋軸直角方向から橋軸方向に変える。これにより、揚重移動機１０が撤去した既設床版２を運搬車両２０に受渡すことができる。
Next, as shown in Figures 3(b) and 4(b), the lifting machine 10 moves forward to the delivery position while hoisting the removed existing deck 2. The transport vehicle 20 passes under the lifting machine 10 (through space) and enters and positions behind the lifting machine 10 (below the suspension point).
Then, the existing deck 2 removed by the lifting machine 10 is hoisted down onto the loading platform of the transport vehicle 20. During this hoisting down, the existing deck 2 is rotated 90° by hand or the like, using a surrender rope, and the longitudinal direction of the existing deck 2 is changed from the direction perpendicular to the bridge axis to the direction of the bridge axis. This allows the existing deck 2 removed by the lifting machine 10 to be handed over to the transport vehicle 20.
次に、図３（ｃ）及び図４（ｃ）に示すように、揚重移動機１０が床版受渡し位置より更に前方へ移動してもよい。これにより、運搬車両２０がバックで、床版受取り位置から前方へ移動した後、方向転換するなどして、退出することができる。これにより、供用中の車線Ｂを通って帰ることができる。 Next, as shown in Figures 3(c) and 4(c), the lifting machine 10 may move further forward from the deck transfer position. This allows the transport vehicle 20 to move forward from the deck receiving position in reverse, and then to exit by changing direction, etc. This allows the vehicle to return via the in-use lane B.
なお、揚重移動機１０を図３（ｂ）及び図４（ｂ）の床版受渡し位置に待機させたまま、運搬車両２０がバックで、揚重移動機１０の下（通り抜け用の空間）を通って、退出するようにしてもよいし、揚重移動機１０の下（通り抜け用の空間）を通らず、運搬車両２０の前進により退出してもよい。 The lifting machine 10 may be left waiting at the deck transfer position in Figures 3(b) and 4(b) while the transport vehicle 20 backs up and exits by passing under the lifting machine 10 (through space), or the transport vehicle 20 may exit by moving forward without passing under the lifting machine 10 (through space).
図３（ｂ）及び図４（ｂ）～図３（ｃ）及び図４（ｃ）の工程が、揚重移動機１０が既設床版２を吊り上げて架け替え作業の進行方向に移動し、既設床版搬出用の運搬車両２０が揚重移動機１０の吊り点の下方に位置し、その後、揚重移動機１０が既設床版２を運搬車両２０に吊り下ろして、運搬車両２０に既設床版２を載せて退出させる、既設床版搬出工程に相当する。 The steps in Figures 3(b) and 4(b) to 3(c) and 4(c) correspond to the existing deck removal process, in which the lifting machine 10 lifts the existing deck 2 and moves in the direction of the replacement work, the transport vehicle 20 for removing the existing deck is positioned below the lifting point of the lifting machine 10, and then the lifting machine 10 hoists the existing deck 2 onto the transport vehicle 20, which then leaves the existing deck 2 on the transport vehicle 20.
運搬車両２０が既設床版２を載せて退出した後、図３（ｄ）及び図４（ｄ）に示すように、新たな運搬車両２０が新設床版２Ｎを載せて車線Ｂ経由でやってくる。
揚重移動機１０は、床版受取り位置（受渡し位置と同じ）で待機している。
そして、運搬車両２０は、揚重移動機１０の下（通り抜け用の空間）を通って、揚重移動機１０の後方（床版受渡し位置；図示点線位置）へ進入、位置する。
After the transport vehicle 20 leaves carrying the existing deck 2, a new transport vehicle 20 comes along via lane B carrying the new deck 2N, as shown in FIG. 3(d) and FIG. 4(d).
The lifting machine 10 waits at the deck receiving position (same as the delivery position).
Then, the transport vehicle 20 passes under the lifting machine 10 (through the space for passage) and enters and positions itself behind the lifting machine 10 (the deck slab delivery position; dotted line position in the drawing).
なお、揚重移動機１０を図３（ｃ）及び図４（ｃ）の位置に待機させた状態で、新設床版２Ｎを載せた運搬車両２０を、揚重移動機１０の下を通過させることなく、先に床版受渡し位置に進入させ、次いで揚重移動機１０を床版受取り位置まで移動させるようにしてもよい。 In addition, while the lifting machine 10 is waiting at the position shown in Figures 3 (c) and 4 (c), the transport vehicle 20 carrying the new deck 2N may enter the deck transfer position first without passing under the lifting machine 10, and then the lifting machine 10 may be moved to the deck receiving position.
次に、図３（ｅ）及び図４（ｅ）に示すように、揚重移動機１０が、その吊り装置により、運搬車両２０の荷台から新設床版２Ｎと吊り上げる。これにより、新設床版２Ｎを運搬車両２０から受取ることができる。 Next, as shown in Figures 3(e) and 4(e), the lifting machine 10 uses its lifting device to lift the new deck 2N from the platform of the transport vehicle 20. This allows the new deck 2N to be received from the transport vehicle 20.
次に、図３（ｆ）及び図４（ｆ）に示すように、空荷となった運搬車両２０がバックで、揚重移動機１０の下（通り抜け用の空間）を通って退出し、揚重移動機１０の前方で待機する（新設床版搬入用の運搬車両と既設床版搬出用の運搬車両とを兼ねる場合）。また、揚重移動機１０の下（通り抜け用の空間）を通らず、運搬車両２０の前進により退出してもよい。 Next, as shown in Figures 3(f) and 4(f), the empty transport vehicle 20 backs up and exits under the lifting machine 10 (through space) and waits in front of the lifting machine 10 (when it serves both as a transport vehicle for bringing in the new deck and a transport vehicle for removing the existing deck). Also, the transport vehicle 20 may exit by moving forward without passing under the lifting machine 10 (through space).
図３（ｄ）及び図４（ｄ）～図３（ｆ）及び図４（ｆ）の工程が、新設床版搬入用の運搬車両２０が揚重移動機１０の吊り点の下方に位置し、その後、揚重移動機１０が運搬車両２０から新設床版２Ｎを吊り上げて、その後、運搬車両２０を退出させる、新設床版搬入工程に相当する。 The steps in Figures 3(d) and 4(d) to 3(f) and 4(f) correspond to the new deck delivery step, in which the transport vehicle 20 for delivering the new deck is positioned below the suspension point of the lifting machine 10, the lifting machine 10 then lifts the new deck 2N from the transport vehicle 20, and then the transport vehicle 20 exits.
次に、図３（ｇ）及び図４（ｇ）に示すように、揚重移動機１０が設置用の新設床版２Ｎを吊ったまま、架け替え作業の進行方向と反対側に移動して、新設床版の設置位置、すなわち、床版架け替え位置に近接する既設床版２上で、吊り点（吊り装置１５）が床版架け替え位置の上方にくる位置まで移動する。 Next, as shown in Figures 3(g) and 4(g), the lifting machine 10, while suspending the new deck 2N to be installed, moves in the opposite direction to the proceeding direction of the replacement work, and moves to the installation position of the new deck, i.e., to a position on the existing deck 2 adjacent to the deck replacement position, where the suspension point (suspension device 15) is above the deck replacement position.
揚重移動機１０は、かかる新設床版の設置位置で、新設床版２Ｎを主桁１上に吊り下ろして、設置する。この吊り下ろしの際に、人力等により、介錯ロープを用いるなどして、新設床版２Ｎを９０°回転させ、新設床版２Ｎの長手方向を橋軸方向から橋軸直角方向に変える。これにより、揚重移動機１０が新設床版２Ｎを正しく設置することができる。 The lifting machine 10 suspends the new deck 2N onto the main girder 1 at the installation position of the new deck and installs it. During this suspension, the new deck 2N is rotated 90 degrees by hand or using a sling rope, etc., to change the longitudinal direction of the new deck 2N from the bridge axis direction to a direction perpendicular to the bridge axis. This allows the lifting machine 10 to correctly install the new deck 2N.
図３（ｇ）及び図４（ｇ）の工程が、揚重移動機１０が前記架け替え作業の進行方向と反対方向に移動して、新設床版２Ｎを吊り下ろして設置する、新設床版設置工程に相当する。 The steps in Figures 3(g) and 4(g) correspond to the new deck installation step, in which the lifting machine 10 moves in the opposite direction to the proceeding direction of the replacement work, suspending and installing the new deck 2N.
以上で床版架け替えの１サイクル（１つの架け替え位置での既設床版の撤去から新設床版の設置まで）が終了し、次の床版架け替えに移行する。
このため、図３（ｈ）及び図４（ｈ）に示すように、揚重移動機１０が床版１枚分前進し、図３（ａ）及び図４（ａ）と同様に、次の既設床版２を主桁１上から吊り上げて、撤去する。
This completes one cycle of deck replacement (from removal of the existing deck at one replacement location to installation of the new deck), and we move on to the next deck replacement.
For this reason, as shown in Figures 3(h) and 4(h), the lifting machine 10 moves forward by the length of one deck slab, and, as in Figures 3(a) and 4(a), the next existing deck slab 2 is lifted from above the main girder 1 and removed.
このように、揚重移動機１０が既設床版２の列上を床版架け替え作業の進行方向に順次（床版１枚分ずつ）移動しつつ、図３（ａ）及び図４（ａ）～図３（ｇ）及び図４（ｇ）の工程を繰り返すことで、床版架け替え作業を効率良く進行することができる。 In this way, the lifting machine 10 moves sequentially (one slab at a time) over the row of existing slabs 2 in the direction in which the slab replacement work is progressing, while repeating the steps in Figures 3(a) and 4(a) to 3(g) and 4(g), allowing the slab replacement work to proceed efficiently.
また、図３（ｆ）及び図４（ｆ）で新設床版の搬入を終えた後に待機させている運搬車両２０は、次の架け替え作業において（すなわち、図３（ｈ）及び図４（ｈ）において）、撤去した既設床版２の搬出に用いる。 In addition, the transport vehicle 20 that is waiting after the delivery of the new deck in Figures 3(f) and 4(f) is used to transport the removed existing deck 2 in the next replacement work (i.e., in Figures 3(h) and 4(h)).
すなわち、床版搬入用の運搬車両２０は、床版を受け渡してから、空荷で退出させた後、待機させ、次の架け替え作業での床版搬出用の運搬車両２０として用いる。これにより、運搬車両２０を効率良く運用することができる。 In other words, the transport vehicle 20 for carrying in the deck is allowed to leave empty after handing over the deck, and is then put on standby to be used as the transport vehicle 20 for carrying out the deck in the next replacement work. This allows the transport vehicle 20 to be operated efficiently.
また、本実施形態では、既設床版搬出工程において、揚重移動機１０が既設床版２を運搬車両２０に吊り下ろす前に、既設床版２を吊り上げている状態で既設床版２の向きを変え、新設床版設置工程において、新設床版２Ｎを吊り下ろす前に、新設床版２Ｎを吊り上げている状態で新設床版２Ｎの向きを変えるようにしている。
このように吊り上げている状態で向きを変えるので、向きを変えるために、ターンテーブルなどの大掛かりな装置を用いることなく、人力等で、簡便に実施可能となる。
In addition, in this embodiment, during the existing deck removal process, the orientation of the existing deck 2 is changed while the lifting mobile machine 10 is lifting the existing deck 2 before hoisting it down to the transport vehicle 20, and during the new deck installation process, the orientation of the new deck 2N is changed while the new deck 2N is lifted up before hoisting it down.
Since the orientation is changed while the object is being lifted in this manner, it is possible to change the orientation easily by human power or the like without using a large-scale device such as a turntable.
また、本実施形態では、揚重移動機１０は、左右の接地部で既設床版２の列上に支持されて、左右の接地部間に運搬車両２０が通り抜けることができる空間１３を有し、既設床版搬出工程又は新設床版搬入工程において、運搬車両２０が揚重移動機１０の吊り点の下方へ進入する際に、運搬車両２０が、揚重移動機１０の左右の接地部間の空間１３を通って揚重移動機１０の下方に位置、又は移動する。これにより、運搬車両２０の進入を容易に行わせることができる。 In addition, in this embodiment, the lifting machine 10 is supported on the row of the existing deck 2 at the left and right grounding parts, and has a space 13 between the left and right grounding parts through which the transport vehicle 20 can pass. During the existing deck removal process or the new deck delivery process, when the transport vehicle 20 enters below the suspension point of the lifting machine 10, the transport vehicle 20 passes through the space 13 between the left and right grounding parts of the lifting machine 10 and moves to a position or position below the lifting machine 10. This allows the transport vehicle 20 to easily enter.
また、本実施形態では、既設床版搬出工程又は新設床版搬入工程において、運搬車両２０が揚重移動機１０の吊り点の下方から退出する際に、揚重移動機１０を運搬車両２０への既設床版受渡し位置又は運搬車両２０からの新設床版受取り位置よりも架け替え作業の進行方向に移動させ、又は、運搬車両２０の前方に移動して、運搬車両２０が、揚重移動機１０を避けて移動する。これにより、運搬車両２０の退出、特に架け替え作業場所からの退出を容易かつ自由に行わせることができる。 In addition, in this embodiment, when the transport vehicle 20 exits from below the suspension point of the lifting machine 10 during the process of removing the existing deck or the process of bringing in the new deck, the lifting machine 10 is moved in the direction of progress of the replacement work from the position where the existing deck is handed over to the transport vehicle 20 or the position where the new deck is received from the transport vehicle 20, or moved forward of the transport vehicle 20, so that the transport vehicle 20 moves while avoiding the lifting machine 10. This allows the transport vehicle 20 to exit, particularly from the replacement work site, easily and freely.
以上では、図５（ａ）に示すように、１台の揚重移動機１０を用いて、床版架け替えエリア（既設床版の列）の一端部から他端部に向かって、床版架け替え作業を進行させているが、工期の短縮などのため、２台の揚重移動機１０を用いて、次のような床版架け替えパターンで作業を進行させることも可能である。 In the above, as shown in Figure 5 (a), one lifting machine 10 is used to carry out the deck replacement work from one end of the deck replacement area (row of existing decks) to the other end. However, in order to shorten the construction period, it is also possible to use two lifting machines 10 and carry out the work in the following deck replacement pattern.
例えば、図５（ｂ）に示すように、２台の揚重移動機１０Ａ、１０Ｂを用い、既設床版２の列中の任意に１つの位置（中間位置）から、それぞれ反対方向（離れる方向）に、順次架け替え作業を行う。 For example, as shown in FIG. 5(b), two lifting and moving machines 10A and 10B are used to perform the reassembly work in sequence from one arbitrary position (middle position) in the row of existing deck slabs 2 in opposite directions (moving away from each other).
又は、図５（ｃ）に示すように、２台の揚重移動機１０Ａ、１０Ｂを用い、既設床版２の列中の任意の２つの位置（両端位置）から、これらの間の中間位置に向かって、順次架け替え作業を行う。 Or, as shown in Figure 5 (c), two lifting and moving machines 10A and 10B are used to perform the reassembly work sequentially from any two positions (both end positions) in the row of the existing deck slab 2 to the intermediate position between them.
このような方法（架け替えパターン）をとることで、床版架け替え作業をより効率良く進めることができる。 By adopting this method (replacement pattern), the deck replacement work can be carried out more efficiently.
なお、図示の実施形態はあくまで本発明を概略的に例示するものであり、本発明は、説明した実施形態により直接的に示されるものに加え、特許請求の範囲内で当業者によりなされる各種の改良・変更を包含するものであることは言うまでもない。
なお、出願当初の請求項は以下の通りであった。
［請求項１］
床版を揚重して移動可能な揚重移動機を用いて、床版の列に対し一の進行方向に順次架け替え作業を行う床版架け替え方法であって、
前記揚重移動機は、既設床版の列上を移動するとともに、前記揚重移動機から前記架け替え作業の進行方向と反対方向に張り出した位置に吊り点を有し、
前記架け替え作業は、
（１）前記揚重移動機により、既設床版を吊り上げて撤去する既設床版撤去工程と、
（２）前記揚重移動機が既設床版を吊り上げて前記架け替え作業の進行方向に移動し、既設床版搬出用の運搬車両が前記揚重移動機の前記吊り点の下方に位置し、その後、前記揚重移動機が既設床版を前記運搬車両に吊り下ろして、前記運搬車両に既設床版を載せて退出させる既設床版搬出工程と、
（３）新設床版搬入用の運搬車両が前記揚重移動機の前記吊り点の下方に位置し、その後、前記揚重移動機が前記運搬車両から新設床版を吊り上げて、その後、前記運搬車両を退出させる新設床版搬入工程と、
（４）前記揚重移動機が前記架け替え作業の進行方向と反対方向に移動して、新設床版を吊り下ろして設置する新設床版設置工程と、
を含む、床版架け替え方法。
［請求項２］
前記揚重移動機は、左右の接地部で既設床版の列上に支持されて、左右の接地部間に前記運搬車両が通り抜けることができる空間を有し、
前記既設床版搬出工程又は前記新設床版搬入工程において、前記運搬車両が前記揚重移動機の前記吊り点の下方へ進入する際に、前記運搬車両が、前記揚重移動機の左右の接地部間の前記空間を通って移動する、請求項１記載の床版架け替え方法。
［請求項３］
前記既設床版搬出工程又は前記新設床版搬入工程において、前記運搬車両が前記揚重移動機の前記吊り点の下方から退出する際に、前記揚重移動機を前記運搬車両への既設床版受渡し位置又は前記運搬車両からの新設床版受取り位置よりも前記架け替え作業の進行方向に移動させ、前記運搬車両が、前記揚重移動機を避けて移動する、請求項１又は請求項２記載の床版架け替え方法。
［請求項４］
前記揚重移動機を２台用い、既設床版の列中の任意の１つの位置から、それぞれ反対方向に、順次架け替え作業を行う、請求項１～請求項３のいずれか１つに記載の床版架け替え方法。
［請求項５］
前記揚重移動機を２台用い、既設床版の列中の任意の２つの位置から、これらの間の中間位置に向かって、順次架け替え作業を行う、請求項１～請求項３のいずれか１つに記載の床版架け替え方法。
It should be noted that the illustrated embodiments are merely schematic illustrations of the present invention, and it goes without saying that the present invention encompasses various improvements and modifications made by those skilled in the art within the scope of the claims, in addition to those directly shown in the described embodiments.
The claims as originally filed were as follows:
[Claim 1]
A method for replacing a deck slab by using a lifting and moving machine capable of lifting and moving the deck slab, the method comprising the steps of:
The lifting and moving machine moves on the row of existing decks and has a suspension point at a position protruding from the lifting and moving machine in a direction opposite to the proceeding direction of the replacement work,
The replacement work is as follows:
(1) an existing deck removal process in which the existing deck is lifted and removed by the lifting and moving machine;
(2) an existing deck removal process in which the lifting and moving machine lifts the existing deck and moves in the direction of travel of the replacement work, a transport vehicle for removing the existing deck is positioned below the hanging point of the lifting and moving machine, and then the lifting and moving machine suspends the existing deck onto the transport vehicle, and the transport vehicle is removed with the existing deck loaded onto it;
(3) A new deck delivery process in which a transport vehicle for delivering a new deck is positioned below the hanging point of the lifting machine, and then the lifting machine lifts the new deck from the transport vehicle, and then the transport vehicle is removed;
(4) a new deck installation process in which the lifting and moving machine moves in a direction opposite to the proceeding direction of the replacement work to suspend and install a new deck;
A method for replacing a deck slab, comprising:
[Claim 2]
The lifting and moving machine is supported on the row of existing deck slabs at the left and right grounding portions, and has a space between the left and right grounding portions through which the transport vehicle can pass,
A deck replacement method as described in claim 1, wherein, during the existing deck removal process or the new deck removal process, when the transport vehicle enters below the suspension point of the lifting mobile machine, the transport vehicle moves through the space between the left and right ground contact portions of the lifting mobile machine.
[Claim 3]
A deck replacement method as described in claim 1 or claim 2, wherein, during the existing deck removal process or the new deck delivery process, when the transport vehicle exits from below the hanging point of the lifting mobile machine, the lifting mobile machine is moved in the direction of progress of the replacement work from a position where the existing deck is delivered to the transport vehicle or a position where the new deck is received from the transport vehicle, and the transport vehicle moves while avoiding the lifting mobile machine.
[Claim 4]
The deck replacement method according to any one of claims 1 to 3, wherein two lifting and moving machines are used to perform replacement work in sequence in opposite directions from any one position in the row of existing decks.
[Claim 5]
The method for replacing the deck slab described in any one of claims 1 to 3, wherein two lifting and moving machines are used to sequentially replace the existing deck slabs from any two positions in the row to the intermediate position between them.
１ 主桁
２ 床版（既設床版）
２Ｎ 新設床版
３ 仮設防護柵
１０、１０Ａ、１０Ｂ 揚重移動機
１１ レール
１２ 車輪（左右の接地部）
１３ 通り抜け用の空間
１４ 桁
１５ 吊り装置（吊り点）
２０ 運搬車両
1 Main girder 2 Deck (existing deck)
2N Newly constructed deck 3 Temporary protective fence 10, 10A, 10B Lifting machine 11 Rail 12 Wheels (left and right ground contact parts)
13 Pass-through space 14 Beam 15 Suspension device (suspension point)
20 Transport vehicles
Claims (2)
前記揚重移動機は、既設床版の列上を移動するとともに、前記揚重移動機から前記架け替え作業の進行方向と反対方向に張り出した位置に吊り点を有し、
前記架け替え作業は、
（１）前記揚重移動機により、既設床版を吊り上げて撤去する既設床版撤去工程と、
（２）前記揚重移動機が既設床版を吊り上げて前記架け替え作業の進行方向に移動し、既設床版搬出用の運搬車両が前記揚重移動機の前記吊り点の下方に位置し、その後、前記揚重移動機が既設床版を前記既設床版搬出用の運搬車両に吊り下ろして、前記既設床版搬出用の運搬車両に既設床版を載せて退出させる既設床版搬出工程と、
（３）新設床版搬入用の運搬車両が前記揚重移動機の前記吊り点の下方に位置し、その後、前記揚重移動機が前記新設床版搬入用の運搬車両から新設床版を吊り上げて、その後、前記新設床版搬入用の運搬車両を退出させる新設床版搬入工程と、
（４）前記揚重移動機が前記架け替え作業の進行方向と反対方向に移動して、新設床版を吊り下ろして設置する新設床版設置工程と、
を含み、
前記新設床版搬入工程にて前記新設床版搬入用の運搬車両を退出させた後、該運搬車両を既設床版の列上における前記揚重移動機よりも前記架け替え作業の進行方向前方で待機させ、
前記待機させている運搬車両を、次の前記架け替え作業における前記既設床版搬出工程にて、前記既設床版搬出用の運搬車両として用い、
前記揚重移動機は、左右の接地部で既設床版の列上に支持されて、左右の接地部間に前記運搬車両が通り抜けることができる空間を有し、
前記既設床版搬出工程及び／又は前記新設床版搬入工程において、前記運搬車両が前記揚重移動機の前記吊り点の下方へ進入する際に、前記運搬車両が、前記揚重移動機の左右の接地部間の前記空間を通って移動する、床版架け替え方法。 A method for replacing a deck slab by using a lifting and moving machine capable of lifting and moving the deck slab, the method comprising the steps of:
The lifting and moving machine moves on the row of existing decks and has a suspension point at a position protruding from the lifting and moving machine in a direction opposite to the proceeding direction of the replacement work,
The replacement work is as follows:
(1) an existing deck removal process in which the existing deck is lifted and removed by the lifting and moving machine;
(2) an existing deck removal process in which the lifting and moving machine lifts the existing deck and moves in the direction of travel of the replacement work, a transport vehicle for transporting the existing deck is positioned below the hanging point of the lifting and moving machine, and then the lifting and moving machine hoists the existing deck onto the transport vehicle for transporting the existing deck, and the transport vehicle for transporting the existing deck is loaded with the existing deck and removed;
(3) A new deck delivery process in which a transport vehicle for new deck delivery is positioned below the hanging point of the lifting machine, and then the lifting machine lifts the new deck from the transport vehicle for new deck delivery, and then the transport vehicle for new deck delivery exits;
(4) a new deck installation process in which the lifting and moving machine moves in a direction opposite to the proceeding direction of the replacement work to suspend and install a new deck;
Including,
In the new deck delivery step, after the transport vehicle for delivering the new deck is withdrawn, the transport vehicle is made to wait ahead of the lifting and moving machine on the row of existing decks in the direction of travel of the replacement work,
The waiting transport vehicle is used as a transport vehicle for carrying out the existing deck in the existing deck carrying out process in the next replacement work,
The lifting and moving machine is supported on the row of existing deck slabs at the left and right grounding portions, and has a space between the left and right grounding portions through which the transport vehicle can pass,
A deck replacement method in which, during the existing deck removal process and/or the new deck removal process, when the transport vehicle enters below the suspension point of the lifting mobile machine, the transport vehicle moves through the space between the left and right ground contact portions of the lifting mobile machine .
前記第１の車線にて前記床版架け替え方法を行っている間、前記第２の車線にて一般車両の通行が可能であり、
前記運搬車両は、既設床版の搬出、及び、新設床版の搬入のために、前記第２の車線を走行する、請求項１に記載の床版架け替え方法。 The bridge to be replaced has a plurality of lanes including a first lane and a second lane,
While the deck replacement method is being performed in the first lane, general vehicles are allowed to pass in the second lane,
The deck replacement method according to claim 1 , wherein the transport vehicle travels on the second lane to transport the existing deck and to transport the new deck.
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| JP2004232426A (en) | 2003-02-03 | 2004-08-19 | Kawada Construction Co Ltd | Floor panel laying apparatus |
| JP2009191458A (en) | 2008-02-12 | 2009-08-27 | Jfe Engineering Corp | Construction apparatus for bridge, construction method for floor slab, and construction method for bridge |
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| JP2019073948A (en) | 2017-10-18 | 2019-05-16 | 鹿島建設株式会社 | Floor slab reconstruction method |
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| JP2578305B2 (en) * | 1993-04-26 | 1997-02-05 | 株式会社ピー・エス | Non-composite RC slab replacement method and self-propelled slab lifting device |
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| JP2004232426A (en) | 2003-02-03 | 2004-08-19 | Kawada Construction Co Ltd | Floor panel laying apparatus |
| JP2009191458A (en) | 2008-02-12 | 2009-08-27 | Jfe Engineering Corp | Construction apparatus for bridge, construction method for floor slab, and construction method for bridge |
| JP2016098489A (en) | 2014-11-18 | 2016-05-30 | 株式会社ピーエス三菱 | Replacement method for concrete floor slab of overpass |
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