JP6682332B2 - Bridge removal method - Google Patents

Bridge removal method Download PDF

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JP6682332B2
JP6682332B2 JP2016082473A JP2016082473A JP6682332B2 JP 6682332 B2 JP6682332 B2 JP 6682332B2 JP 2016082473 A JP2016082473 A JP 2016082473A JP 2016082473 A JP2016082473 A JP 2016082473A JP 6682332 B2 JP6682332 B2 JP 6682332B2
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girder
axle
removal
bridge
construction
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伸友 青木
伸友 青木
克巳 美坂
克巳 美坂
寛典 森
寛典 森
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Nippon Sharyo Ltd
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本発明は、線路の上に架かる跨線橋梁または道路の上に架かる跨道橋梁等の橋梁を撤去するための技術に関し、詳しくは大型搬送用車両を用いての橋梁撤去方法に関する。   The present invention relates to a technique for removing a bridge such as an overpass bridge over a railroad track or an overpass bridge over a road, and more particularly to a bridge removal method using a large transport vehicle.

近年、インフラの老朽化に伴って橋梁設備などの更新を行う機会が増えている。線路上に設けられた橋梁も撤去対象になっているが、基幹道路など交通量の多い場所に用いられている橋梁の場合、撤去作業は迅速に行う必要がある。   In recent years, the opportunities for renewing bridge facilities have increased as the infrastructure deteriorates. Bridges on the tracks are also subject to removal, but in the case of bridges used in high traffic areas such as trunk roads, removal work must be done promptly.

特許文献１には、橋桁の架替工法に関する技術が開示されている。作業ヤードで組立てられた新桁をレールと油圧ジャッキ搭載の自走台車により橋軸方向に移動させて旧桁上に搬入する。そして、仮受けサンドルと油圧ジャッキからなる仮受け材で支持し、新桁に設置した吊り降ろし装置で旧桁を吊り下げ支持する。この状態で旧桁を吊り降ろし装置により運搬台車上に降下させて撤去し、新桁を降下させて架設位置に架設する。架替工法にこの様な構成をとることで、横取り用の作業構台が設置出来ない場合や桁下空間利用制限などの条件がある場合でも架替工事を可能としている。   Patent Document 1 discloses a technique related to a bridge girder replacement method. The new girder assembled in the work yard is moved in the direction of the bridge axis by a self-propelled carriage equipped with rails and hydraulic jacks and carried onto the old girder. Then, it is supported by a temporary receiving material composed of a temporary receiving sandle and a hydraulic jack, and the old girder is suspended and supported by a hoisting device installed on the new girder. In this state, the old girder is lowered onto the carrier by means of a lifting device and removed, and the new girder is lowered and installed at the erection position. By adopting this kind of structure for the replacement method, it is possible to perform replacement work even if there are conditions such as the installation of a work gantry for stealing or restrictions on the use of space under the girder.

特許文献２には、既設橋梁の撤去方法及び既設橋梁の更新方法についての技術が開示されている。既設橋桁の上に跨線道のスペースを利用してエレクションガーダー等の架設桁を送り出して配置し、既設橋桁の軸方向に所定のピッチで配置された仮吊り梁及び吊鋼棒を介して既設橋桁を架設桁に支持させる。そして、既設橋桁を隣り合う一対の仮吊り梁に含むように複数の桁ブロックに切断し、桁ブロックの一対の仮吊り梁に下部吊り金具を嵌合させて移動吊り装置により個別に吊り下げる。そして、吊鋼棒の架設桁の側の連結を解除して、跨線道または車両走行路などに待機する車両に積み込んで撤去する。   Patent Document 2 discloses a technique regarding a method for removing an existing bridge and a method for updating an existing bridge. The erection girders such as the erection girder are sent out and placed on the existing bridge girders using the space of the overpass, and the existing girders are installed through the temporary suspension beams and hanging steel rods arranged at a predetermined pitch in the axial direction of the existing bridge girders. Support the bridge girder on the erection girder. Then, the existing bridge girder is cut into a plurality of girder blocks so as to be included in a pair of adjacent temporary suspension beams, the lower suspension fittings are fitted to the pair of temporary suspension beams of the girder block, and individually suspended by the moving suspension device. Then, the connection of the suspension steel bar on the side of the erection girder is released, and the suspension steel rod is loaded on a vehicle standing by on an overpass or a vehicle traveling path and removed.

特開２００９−０５２３０６号公報JP, 2009-052306, A 特開２０１４−６６００７号公報JP, 2014-66007, A

しかしながら、特許文献１に記載の技術は、橋桁の下に搬送用のユニットキャリアが入ることが出来ることが前提である上、新桁を搬送するにはレール上を搬送出来る油圧ジャッキ搭載の自走台車が用いられており、こうした複数の設備が運用出来る条件でないと、適用ができないと考えられる。一方、特許文献２では跨線道の既設橋桁を撤去可能だが、長大な架設桁を設置した上で移動吊り装置を運用可能に調整しなければならず、かなり大掛かりな撤去準備を必要とする。こうした事情は跨道橋でも同じだと考えられる。跨線道・跨道橋などが主要道路になっている場合には、こうした大掛かりな設備を構築するには色々制限が多く、場合によっては長期間道路を通行止めにする必要がある。   However, the technique described in Patent Document 1 is based on the premise that a unit carrier for transportation can be inserted under a bridge girder, and in order to transport a new girder, a self-propelled hydraulic jack mounted that can be transported on a rail. A trolley is used, and it is considered that it cannot be applied unless it is possible to operate such multiple facilities. On the other hand, in Patent Document 2, the existing bridge girder of the overpass can be removed, but the mobile suspension device must be operably adjusted after installing a long erection girder, and a considerably large amount of preparation for removal is required. It is considered that these circumstances are the same for the overpass. When overpasses and overpasses are the main roads, there are many restrictions to build such large-scale facilities, and in some cases it is necessary to block roads for a long time.

そこで、本発明はこの様な課題を解決するために、短期間で橋梁を撤去可能とする橋梁撤去方法を提供することを目的としている。   Then, in order to solve such a subject, this invention aims at providing the bridge removal method which enables a bridge to be removed in a short period of time.

前記目的を達成するために、本発明の一態様による橋梁撤去方法は、以下のような特徴を有する。   In order to achieve the above object, the bridge removing method according to one aspect of the present invention has the following features.

（１）独立して高さ調整可能な走行輪を複数有する多軸台車と、撤去橋桁を吊り下げ可能な工事桁と、工事桁及び撤去橋桁をジャッキアップ可能な扛重装置と、を有し、前記工事桁は、前記多軸台車の上に保持される前記扛重装置で支持され、前記多軸台車で、前記工事桁を撤去橋桁の上空まで搬送し、前記工事桁と前記撤去橋桁を鋼棒で繋ぎ、前記工事桁にて前記撤去橋桁を保持し、前記扛重装置で、前記工事桁をジャッキアップし、前記多軸台車を移動する事で、前記撤去橋桁を設置場所から移動させること、を特徴とする。 (1) It has a multi-axle bogie having a plurality of independently adjustable height wheels, a construction girder capable of suspending a removal bridge girder, and a lifting device capable of jacking up the construction girder and removal bridge girder. , The construction girder is supported by the lifting device held on the multi-axle trolley, the multi-axle trolley conveys the construction girder to the sky above the removal bridge girder, and the construction girder and the removal bridge girder are transported. Connect the steel girder with the construction girder to hold the removal bridge girder, jack up the construction girder with the lifting device, and move the multi-axle trolley to move the removal girder girder from the installation location. It is characterized by

上記（１）に記載の態様によれば、跨線道を多軸台車で移動して、多軸台車に支持された工事桁を用いて撤去橋桁を撤去させることができる。このため、撤去橋桁を吊り上げるための構造物を跨線道に設置する必要が無くなり、短期間で撤去橋桁の撤去が可能となる。これは、多軸台車に独立して高さが調整可能な走行輪を複数備えることで不整地であっても工事桁の水平を出す事が容易である上に、多軸台車に備えた扛重装置によって撤去橋桁をジャッキアップすることができる為である。この為、事前に跨線道に構造物を設置しなくとも、工事桁を利用して撤去橋桁を撤去可能となり、工期の短縮に貢献することができる。   According to the aspect described in the above (1), it is possible to move the overpass with a multi-axle dolly and to remove the removal bridge girder using the construction girder supported by the multi-axle dolly. Therefore, it is not necessary to install a structure for lifting the removed bridge girder on the overpass, and it is possible to remove the removed bridge girder in a short period of time. This is because the multi-axle bogie is equipped with a plurality of independently adjustable height wheels, which makes it easy to level the work girder even on uneven terrain. This is because the demolition bridge girder can be jacked up with heavy equipment. Therefore, it is possible to remove the bridge girder to be removed using the construction girder without installing a structure on the overpass in advance, which can contribute to shortening the construction period.

（２）（１）に記載の橋梁撤去方法において、複数の前記多軸台車は、第１多軸台車と第２多軸台車及び第３多軸台車を含み、前記第１多軸台車と前記第２多軸台車とで一端側を保持される前記工事桁は、他端を仮受台に預けて支持され、前記他端を前記仮受台から前記第３多軸台車に預け、前記第２多軸台車と前記第３多軸台車にそれぞれ備えられる扛重装置で、前記工事桁をジャッキアップすることで、前記工事桁に保持させた前記撤去橋桁を吊り上げ、前記第２多軸台車と前記第３多軸台車によって前記撤去橋桁を移動させることで、前記撤去橋桁を設置場所から移動させること、が好ましい。この態様により、撤去を予定している橋梁の上を輸送車両が通過できないような場合でも、工事桁の撤去が可能となる。 (2) In the method of removing a bridge according to (1), the plurality of multi-axle carriages include a first multi-axle carriage, a second multi-axle carriage and a third multi-axle carriage, and the first multi-axle carriage and the multi-axle carriage. The construction girder, which is held at one end side with the second multi-axle trolley, is supported by depositing the other end on a temporary pedestal and depositing the other end from the tentative pedestal on the third multi-axle trolley. 2 The multi-axle trolley and the third multi-axle trolley are respectively provided with lifting devices to jack up the construction girder to lift up the removal bridge girder held on the construction girder, and to the second multi-axle trolley. It is preferable that the removal bridge girder is moved from the installation location by moving the removal bridge girder by the third multi-axle carriage. According to this aspect, the construction girder can be removed even when the transport vehicle cannot pass over the bridge scheduled to be removed.

本実施形態の、撤去対象となる橋梁の側面図である。It is a side view of the bridge used as the object of removal of this embodiment. 本実施形態の、跨線道の平面図である。It is a top view of an overpass in this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ１」の側面図である。It is a side view of "removal procedure P1" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ２」の側面図である。It is a side view of "removal procedure P2" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ３」の側面図である。It is a side view of "removal procedure P3" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ４」の側面図である。It is a side view of "removal procedure P4" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ５」の側面図である。It is a side view of "removal procedure P5" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ６」の側面図である。It is a side view of "removal procedure P6" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ７」の側面図である。It is a side view of "removal procedure P7" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ８」の側面図である。It is a side view of "removal procedure P8" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ９」の側面図である。It is a side view of "removal procedure P9" of the removal bridge girder of this embodiment. 本実施形態の、撤去橋桁の「撤去手順Ｐ１０」の側面図である。It is a side view of "removal procedure P10" of the removal bridge girder of this embodiment.

まず、本発明の実施形態について図面を用いて説明を行う。図１に、本実施形態の撤去対象となる橋梁の側面図を示す。図２に、跨線道の様子を平面図に示す。なお、図２は車両を割愛している。複線の軌道２０を跨ぐようにして跨線道５０が設けられる場合、軌道２０上には橋梁５１が設けられる。そして、老朽化して撤去が必要な橋梁５１の桁（以下、撤去橋桁１０とする）は、跨線道５０の途中に設けられている。本実施形態では便宜上、跨線道５０を、撤去橋桁１０を挟んで第１道路５０Ａと第２道路５０Ｂとして呼び分けている。この撤去橋桁１０を、多軸台車に相当する第１ユニットキャリア１０１等を使って撤去する。次に、撤去橋桁１０の撤去手順について説明する。   First, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a side view of the bridge to be removed in this embodiment. FIG. 2 shows a plan view of an overpass. It should be noted that FIG. 2 omits the vehicle. When the overpass 50 is provided so as to straddle the multi-track track 20, a bridge 51 is provided on the track 20. The girder of the bridge 51 that is deteriorated and needs to be removed (hereinafter referred to as the removed bridge girder 10) is provided in the middle of the overpass 50. In the present embodiment, for the sake of convenience, the overpass 50 is referred to as the first road 50A and the second road 50B with the removal bridge girder 10 interposed therebetween. This removed bridge girder 10 is removed using the first unit carrier 101 or the like which is equivalent to a multi-axle trolley. Next, a procedure for removing the removed bridge girder 10 will be described.

図３に、撤去橋桁１０の「撤去手順Ｐ１」を側面図として示す。第１ユニットキャリア１０１は、いわゆるユニットキャリアと呼ばれる大型自走キャリアであり複数の駆動軸と制動軸を有する。各軸はそれぞれ高さ調節機構を備えており、それぞれ高さの微調整が可能である。第２ユニットキャリア１０２及び後述の第３ユニットキャリア１０３も第１ユニットキャリア１０１と同等の機能を備えている。第１ユニットキャリア１０１乃至第３ユニットキャリア１０３は、協調制御が可能であるために複数揃えて運用することで、撤去橋桁１０のような重量物を搬送することが可能である。   FIG. 3 shows the “removal procedure P1” of the removed bridge girder 10 as a side view. The first unit carrier 101 is a so-called unit carrier, which is a large self-propelled carrier, and has a plurality of drive shafts and braking shafts. Each shaft is equipped with a height adjusting mechanism, and each height can be finely adjusted. The second unit carrier 102 and the third unit carrier 103 described later also have the same functions as the first unit carrier 101. Since the first unit carrier 101 to the third unit carrier 103 can be operated in a coordinated manner because they can be controlled cooperatively, it is possible to transport heavy objects such as the removal bridge girder 10.

第１ユニットキャリア１０１には、扛重装置（ジャッキ）に相当する第１ユニットジャッキ１０６が備えられている。第２ユニットキャリア１０２には第２ユニットジャッキ１０７が備えられている。第３ユニットキャリア１０３には第３ユニットジャッキ１０８が備えられている。そして、「撤去手順Ｐ１」として、第１ユニットキャリア１０１及び第２ユニットキャリア１０２は、工事桁１２０を搬送して撤去橋桁１０の手前まで跨線道５０を移動する。第１ユニットキャリア１０１の端部から第１道路５０Ａの端までの領域がバックヤードとして設定される。   The first unit carrier 101 is provided with a first unit jack 106 corresponding to a lifting device (jack). The second unit carrier 102 is provided with a second unit jack 107. The third unit carrier 103 is provided with a third unit jack 108. Then, as the "removal procedure P1", the first unit carrier 101 and the second unit carrier 102 carry the construction girder 120 and move the overpass 50 to the position before the removal bridge girder 10. The area from the end of the first unit carrier 101 to the end of the first road 50A is set as the backyard.

工事桁１２０は撤去橋桁１０の撤去に用いる桁であり、一端にはカウンタウェイト１３０を配置している。これは、撤去橋桁１０を第１道路５０Ａ側からアクセスして撤去する為、工事桁１２０を第２ユニットキャリア１０２よりも撤去橋桁１０の長さ以上に張り出させる必要があるからである。そして、その重量バランスを改善する為にカウンタウェイト１３０が配置されている。仮受台１５０は第２道路５０Ｂ側に配置されており、工事桁１２０の一端を支持するのに用いられる。   The construction girder 120 is a girder used to remove the removed bridge girder 10, and a counterweight 130 is arranged at one end. This is because the removal bridge girder 10 is accessed and removed from the first road 50A side, so that the construction girder 120 needs to be extended beyond the length of the removal bridge girder 10 beyond the second unit carrier 102. A counterweight 130 is arranged to improve the weight balance. The temporary receiving stand 150 is disposed on the second road 50B side and is used to support one end of the construction girder 120.

図４に、撤去橋桁１０の「撤去手順Ｐ２」を側面図として示す。「撤去手順Ｐ２」として、第１ユニットキャリア１０１及び第２ユニットキャリア１０２を移動させて、仮受台１５０に工事桁１２０の他端を預ける。第１ユニットキャリア１０１及び第２ユニットキャリア１０２には第１ユニットジャッキ１０６及び第２ユニットジャッキ１０７が備えられている。第１ユニットジャッキ１０６及び第２ユニットジャッキ１０７の高さを調整することで工事桁１２０の他端を仮受台１５０に保持させることができる。   FIG. 4 shows the “removal procedure P2” of the removed bridge girder 10 as a side view. As the “removal procedure P2”, the first unit carrier 101 and the second unit carrier 102 are moved to deposit the other end of the work girder 120 on the temporary receiving stand 150. The first unit carrier 101 and the second unit carrier 102 are provided with a first unit jack 106 and a second unit jack 107. By adjusting the heights of the first unit jack 106 and the second unit jack 107, the other end of the work girder 120 can be held on the temporary receiving stand 150.

図５に、撤去橋桁１０の「撤去手順Ｐ３」を側面図として示す。「撤去手順Ｐ３」として、仮受台１５０に他端を預けた状態で、工事桁１２０の先端に延長桁１２０Ａを取付けて延長する。以降は、特に説明しない限り、工事桁１２０は延長桁１２０Ａを含むものとする。なお、この手順はバックヤードとして設定される領域を短くすることや、カウンタウェイト１３０の重さを緩和する為の措置であるので、最初から工事桁１２０が延長された長さのものであっても良い。   FIG. 5 shows the “removal procedure P3” of the removed bridge girder 10 as a side view. As the "removal procedure P3", the extension girder 120A is attached to the tip of the construction girder 120 and extended while the other end is stored in the temporary support 150. Hereinafter, unless otherwise specified, the work girder 120 includes the extension girder 120A. Since this procedure is a measure for shortening the area set as the backyard and for reducing the weight of the counterweight 130, the construction girder 120 has an extended length from the beginning. Is also good.

図６に、撤去橋桁１０の「撤去手順Ｐ４」を側面図として示す。「撤去手順Ｐ４」として、第２道路５０Ｂに第３ユニットキャリア１０３を向かわせて、工事桁１２０の先端に取付けた延長桁１２０Ａの下部を支持する。この際、第３ユニットキャリア１０３を第２道路５０Ｂの端から離れた位置に、第２ユニットキャリア１０２を第１道路５０Ａの端の直近に配置する。なお、このケースは、第２ユニットキャリア１０２が撤去橋桁１０を渡らない想定で説明されるが、第２ユニットキャリア１０２が撤去橋桁１０を渡ることができる場合には、第３ユニットキャリア１０３を用いずとも撤去橋桁１０の撤去作業が可能である。   FIG. 6 shows the “removal procedure P4” of the removal bridge girder 10 as a side view. As the "removal procedure P4", the third unit carrier 103 is directed to the second road 50B and the lower portion of the extension girder 120A attached to the tip of the construction girder 120 is supported. At this time, the third unit carrier 103 is arranged at a position away from the end of the second road 50B, and the second unit carrier 102 is arranged near the end of the first road 50A. This case is described on the assumption that the second unit carrier 102 does not cross the removal bridge girder 10. However, when the second unit carrier 102 can cross the removal bridge girder 10, the third unit carrier 103 is used. The removal work of the removed bridge girder 10 is possible without exception.

図７に、撤去橋桁１０の「撤去手順Ｐ５」を側面図として示す。「撤去手順Ｐ５」として、カウンタウェイト１３０を撤去し、第１ユニットキャリア１０１を移動させた後、工事桁１２０を第２ユニットキャリア１０２及び第３ユニットキャリア１０３で支えた状態で、吊鋼棒１２５（ＰＣ鋼棒等を用いることを想定している）を降下させる。工事桁１２０にはＣＨ型ジャッキ１２６が設けられ、吊鋼棒１２５がＣＨ型ジャッキ１２６によって保持されている。つまり、吊鋼棒１２５は、工事桁１２０に対してＣＨ型ジャッキ１２６によって昇降可能に保持されている。工事桁１２０に４セットの吊鋼棒１２５及びＣＨ型ジャッキ１２６が備えられ、撤去橋桁１０の両端に固定すべく吊鋼棒１２５を必要な長さだけ降下させる。   FIG. 7 shows the “removal procedure P5” of the removed bridge girder 10 as a side view. As the "removal procedure P5", the counterweight 130 is removed, the first unit carrier 101 is moved, and then the suspended steel rod 125 is supported with the construction girder 120 supported by the second unit carrier 102 and the third unit carrier 103. (It is assumed that a PC steel rod or the like is used) is lowered. The construction girder 120 is provided with a CH-type jack 126, and the hanging steel rod 125 is held by the CH-type jack 126. That is, the hanging steel rod 125 is held so as to be able to move up and down with respect to the work girder 120 by the CH-type jack 126. The work girder 120 is equipped with four sets of hanging steel rods 125 and CH-type jacks 126, and the hanging steel rods 125 are lowered by a required length to be fixed to both ends of the removed bridge girder 10.

図８に、撤去橋桁１０の「撤去手順Ｐ６」を側面図として示す。「撤去手順Ｐ６」として、第２ユニットキャリア１０２及び第３ユニットキャリア１０３を用いて撤去橋桁１０を吊り上げる。撤去橋桁１０の両端に吊鋼棒１２５が固定された状態で、第２ユニットキャリア１０２及び第３ユニットキャリア１０３の上に備えられた第２ユニットジャッキ１０７及び第３ユニットジャッキ１０８をジャッキアップする。そうすることで、工事桁１２０に撤去橋桁１０が吊られた状態とする。その状態で、第２ユニットキャリア１０２及び第３ユニットキャリア１０３を協調制御しながら移動させ、工事桁１２０に吊り下げられた撤去橋桁１０を移動させる。   FIG. 8 shows the “removal procedure P6” of the removed bridge girder 10 as a side view. As the “removal procedure P6”, the removed bridge girder 10 is lifted using the second unit carrier 102 and the third unit carrier 103. With the suspended steel rods 125 fixed to both ends of the removed bridge girder 10, the second unit jack 107 and the third unit jack 108 provided on the second unit carrier 102 and the third unit carrier 103 are jacked up. By doing so, the removal bridge girder 10 is hung on the construction girder 120. In that state, the second unit carrier 102 and the third unit carrier 103 are moved in a coordinated manner, and the removal bridge girder 10 suspended from the construction girder 120 is moved.

図９に、撤去橋桁１０の「撤去手順Ｐ７」を側面図として示す。「撤去手順Ｐ７」として、工事桁１２０に吊られた状態の撤去橋桁１０を、第１道路５０Ａ側に移動させた状態で、第２ユニットジャッキ１０７及び第３ユニットジャッキ１０８をジャッキダウンして、撤去橋桁１０を第１道路５０Ａの上に下ろす。   FIG. 9 shows the “removal procedure P7” of the removed bridge girder 10 as a side view. As the “removal procedure P7”, while the removal bridge girder 10 suspended from the construction girder 120 is moved to the first road 50A side, the second unit jack 107 and the third unit jack 108 are jacked down, Lower the bridge bridge girder 10 onto the first road 50A.

図１０に、撤去橋桁１０の「撤去手順Ｐ８」を側面図として示す。「撤去手順Ｐ８」として、第１道路５０Ａの上に設置された２つの仮受台４６（必要に応じてそれ以上としても良い）の上に、撤去橋桁１０を下ろした状態で、吊鋼棒１２５と撤去橋桁１０の固定を解除して、吊鋼棒１２５をＣＨ型ジャッキ１２６によってジャッキアップする。この段階で、撤去橋桁１０の上に配置された送り装置４５で工事桁１２０の下面を支持する形にする。   FIG. 10 shows the “removal procedure P8” of the removed bridge girder 10 as a side view. As the "removal procedure P8", the suspended steel rod is suspended with the removal bridge girder 10 lowered on the two temporary pedestals 46 (may be more than that if necessary) installed on the first road 50A. The fixed 125 and the removed bridge girder 10 are released, and the hanging steel rod 125 is jacked up by the CH type jack 126. At this stage, the lower surface of the work girder 120 is supported by the feeding device 45 arranged on the removal bridge girder 10.

図１１に、撤去橋桁１０の「撤去手順Ｐ９」を側面図として示す。「撤去手順Ｐ９」として、まず、不要となった第３ユニットキャリア１０３を移動させる。そして、第２ユニットキャリア１０２によって工事桁１２０の移動をさせる。工事桁１２０は図１１に示される様な第２ユニットキャリア１０２に一端を、撤去橋桁１０の上に設置された送り装置４５によって他端を支持されている状態とするように第２ユニットキャリア１０２を移動させる。   FIG. 11 shows a “removal procedure P9” of the removed bridge girder 10 as a side view. As the “removal procedure P9”, first, the unnecessary third unit carrier 103 is moved. Then, the construction girder 120 is moved by the second unit carrier 102. The construction girder 120 has one end supported by the second unit carrier 102 as shown in FIG. 11 and the other end supported by the feeding device 45 installed on the removal bridge girder 10. To move.

図１２に、撤去橋桁１０の「撤去手順Ｐ１０」を側面図として示す。「撤去手順Ｐ１０」として、工事桁１２０を撤去する。工事桁１２０は分解可能な構成とされているので、図１２では一部が送り装置４５に支えられて撤去橋桁１０の上に配置されている様子となっている。その後、撤去橋桁１０及び工事桁１２０を撤去する。こうして、撤去橋桁１０の撤去を完了する。その後に、新たな橋桁を用意して設置工事を行うが、その手順に関してはここでは割愛する。   FIG. 12 shows the “removal procedure P10” of the removed bridge girder 10 as a side view. As the "removal procedure P10", the construction girder 120 is removed. Since the construction girder 120 is configured to be disassembled, a part of the construction girder 120 is supported by the feeding device 45 and arranged on the removal bridge girder 10. After that, the removed bridge girder 10 and the construction girder 120 are removed. Thus, the removal of the removed bridge girder 10 is completed. After that, a new bridge girder is prepared and installation work is performed, but the procedure is omitted here.

本実施形態の橋梁撤去方法を用いることで、以下に説明するような作用及び効果を奏する。   By using the bridge removing method of the present embodiment, the following actions and effects are obtained.

本実施形態の橋梁撤去方法により、撤去橋桁１０の撤去における作業期間の短縮を図ることが可能である。これは、本実施形態の橋梁撤去方法が、独立して高さ調整可能な走行輪を複数有するユニットキャリアである第１ユニットキャリア１０１乃至第３ユニットキャリア１０３と、撤去橋桁１０を吊り下げ可能な工事桁１２０と、工事桁１２０及び撤去橋桁１０をジャッキアップ可能な扛重装置である第１ユニットジャッキ１０６、第２ユニットジャッキ１０７、第３ユニットジャッキ１０８と、を有し、工事桁１２０は、多軸台車（第１ユニットキャリア１０１乃至第３ユニットキャリア１０３）の上に保持される扛重装置（第１ユニットジャッキ１０６乃至第３ユニットジャッキ１０８）で支持され、多軸台車（第１ユニットキャリア１０１乃至第３ユニットキャリア１０３のいずれか）で、工事桁１２０を撤去橋桁１０の上空まで搬送し、工事桁１２０と撤去橋桁１０を吊鋼棒１２５で繋ぎ、工事桁１２０にて撤去橋桁１０を保持し、扛重装置（第１ユニットジャッキ１０６乃至第３ユニットジャッキ１０８のいずれか）で、工事桁１２０をジャッキアップし、多軸台車（第１ユニットキャリア１０１乃至第３ユニットキャリア１０３のいずれか）を移動する事で、撤去橋桁１０を設置場所から移動させる。   The bridge removal method of the present embodiment can shorten the work period for removing the removed bridge girder 10. This is because the bridge removing method of the present embodiment can suspend the first to third unit carriers 103 to 103, which are unit carriers having a plurality of traveling wheels whose heights can be independently adjusted, and the removed bridge girder 10. The work girder 120 includes a work girder 120, a first unit jack 106, a second unit jack 107, and a third unit jack 108, which are lifting devices capable of jacking up the work girder 120 and the removal bridge girder 10. The multi-axle carriage (first unit carrier 101 to third unit carrier 103) is supported by a lifting device (first unit jack 106 to third unit jack 108) held on the multi-axle carriage (first unit carrier). 101 to the third unit carrier 103), the construction girder 120 is transported to the sky above the removed bridge girder 10, The thing girder 120 and the removed bridge girder 10 are connected with the hanging steel rod 125, the removed girder 10 is held by the construction girder 120, and the work girder is supported by the lifting device (any one of the first unit jack 106 to the third unit jack 108). By jacking up 120 and moving the multi-axis carriage (one of the first unit carrier 101 to the third unit carrier 103), the removal bridge girder 10 is moved from the installation place.

また詳しくは、複数の多軸台車は、第１ユニットキャリア１０１と第２ユニットキャリア１０２及び第３ユニットキャリア１０３を含み、第１ユニットキャリア１０１と第２ユニットキャリア１０２とで一端側を保持される工事桁１２０は、他端を仮受台１５０に預けて支持され、他端を仮受台１５０から第３ユニットキャリア１０３に預け、第２ユニットキャリア１０２に備えられる第２ユニットジャッキ１０７と、第３ユニットキャリア１０３に備えられる第３ユニットジャッキ１０８とで、工事桁１２０をジャッキアップすることで、工事桁１２０に保持させた撤去橋桁１０を吊り上げ、第２ユニットキャリア１０２と第３ユニットキャリア１０３によって撤去橋桁１０を移動させることで、撤去橋桁１０を設置場所から移動させるものである。   More specifically, the plurality of multi-axle trucks include a first unit carrier 101, a second unit carrier 102, and a third unit carrier 103, and one end side is held by the first unit carrier 101 and the second unit carrier 102. The construction girder 120 is supported by depositing the other end on the temporary receiving stand 150, depositing the other end from the temporary receiving stand 150 on the third unit carrier 103, and the second unit jack 107 provided on the second unit carrier 102; By jacking up the work girder 120 with the third unit jack 108 provided in the three-unit carrier 103, the removal bridge girder 10 held by the work girder 120 is lifted, and the second unit carrier 102 and the third unit carrier 103 By moving the removal bridge girder 10, the removal bridge girder 10 can also be moved from the installation location. It is.

これは、特許文献２などで説明されるような、構造物の構築などに必要な工期が短縮できる事に起因する。つまり、事前に撤去橋桁１０の周囲に軌道２０を跨ぐような大きな構造物を構築する場合には、跨線道５０の通行を止めるといったことが必要となるケースが多く、跨線道５０が基幹道路であった場合には、長期間の交通止めが必要となって特許文献２に示される様な工法を実施する事は困難である。また、撤去橋桁１０を吊り下げるための装置の搬入及び搬出の為に、撤去する橋梁の上面に軌条設備を設置し、搬出後に撤去するなどの方法を用いるケースもあった。   This is because the construction period required for constructing a structure can be shortened as described in Patent Document 2 and the like. In other words, when constructing a large structure that crosses the track 20 around the demolition bridge girder 10 in advance, it is often necessary to stop the passage of the overpass 50, and the overpass 50 is the backbone. If the road is a road, it is necessary to stop the traffic for a long time, and it is difficult to implement the construction method shown in Patent Document 2. In addition, in order to carry in and carry out a device for suspending the removed bridge girder 10, there is a case in which a rail system is installed on the upper surface of the bridge to be removed, and after the carrying out, the method of removing is used.

一方、本実施形態の撤去橋桁１０の撤去方法を用いる場合、第１ユニットキャリア１０１乃至第３ユニットキャリア１０３と、それぞれに備えられた第１ユニットジャッキ１０６乃至第３ユニットジャッキ１０８。そして、第１ユニットジャッキ１０６乃至第３ユニットジャッキ１０８に支持される工事桁１２０を用いることで、撤去橋桁１０を吊り下げるので、事前に大きな構造物を構築する必要が無い。この結果、交通量の少ない夜間に撤去橋桁１０の撤去作業を完了することが可能となる。その結果、工事期間の短縮を図ることが可能となる。工期短縮によって、通行止め期間も短縮でき、跨線道５０の利用者の利便性を図ることが可能となる。   On the other hand, when the method of removing the removal bridge girder 10 of the present embodiment is used, the first unit carrier 101 to the third unit carrier 103, and the first unit jack 106 to the third unit jack 108 provided respectively. Further, since the removal bridge girder 10 is suspended by using the construction girder 120 supported by the first unit jack 106 to the third unit jack 108, it is not necessary to construct a large structure in advance. As a result, the removal work of the removal bridge girder 10 can be completed at night when the traffic volume is low. As a result, the construction period can be shortened. By shortening the construction period, the closed period can be shortened, and the convenience of the user of the overpass 50 can be improved.

また、跨線道５０がカーブしていたり、跨線道５０が傾斜していたりするようなケースでも、第１ユニットキャリア１０１乃至第３ユニットキャリア１０３の駆動軸や制動軸を含む走行輪にそれぞれ高さ調節機構を備えている為、工事桁１２０を支持する際に工事桁１２０の水平を維持することが出来る。この為、安全に撤去橋桁１０の撤去が可能となる。   Further, even in a case where the overpass 50 is curved or the overpass 50 is inclined, the traveling wheels including the drive shafts and the braking shafts of the first unit carrier 101 to the third unit carrier 103 are respectively provided. Since the height adjusting mechanism is provided, the work girder 120 can be maintained horizontal when supporting the work girder 120. Therefore, the removal bridge girder 10 can be safely removed.

以上、本発明に係る橋梁撤去方法の実施形態を説明したが、本発明はこれに限定されるわけではなく、その趣旨を逸脱しない範囲で様々な変更が可能である。例えば、本実施形態では、跨線橋を例に挙げて説明しているが、跨道橋であっても同様の事情であるため、本発明の適用が可能である。また、第１ユニットキャリア１０１乃至第３ユニットキャリア１０３を用いて工事桁１２０を搬送しているが、撤去橋桁１０をユニットキャリアが通過することが可能であれば第１ユニットキャリア１０１と第２ユニットキャリア１０２の２台での撤去が可能である。この場合は、第１ユニットキャリア１０１と第２ユニットキャリア１０２とで工事桁１２０の両端を支持し、仮受台１５０を利用することなく第２ユニットキャリア１０２に撤去橋桁１０を渡らせて工事桁１２０を撤去橋桁１０の上に配置し、工事桁１２０で撤去橋桁１０を吊り下げると言った方法が考えられる。   Although the embodiment of the bridge removing method according to the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. For example, although the present embodiment has been described by taking an overpass as an example, the present invention can be applied to an overpass because of similar circumstances. Further, the construction girder 120 is transported using the first unit carrier 101 to the third unit carrier 103, but if the unit carrier can pass through the removal bridge girder 10, the first unit carrier 101 and the second unit carrier Two carriers 102 can be removed. In this case, the first unit carrier 101 and the second unit carrier 102 support both ends of the construction girder 120, and the removal bridge girder 10 can be crossed over to the second unit carrier 102 without using the temporary receiving stand 150. A method of arranging 120 on the removal bridge girder 10 and suspending the removal bridge girder 10 on the construction girder 120 can be considered.

また、本実施形態では工事桁１２０に、ＣＨ型ジャッキ１２６が固定されて吊鋼棒１２５を昇降させているが、工事桁１２０の上面に移動装置を設け、その移動装置にＣＨ型ジャッキ１２６を固定して、吊鋼棒１２５で撤去橋桁１０を吊り上げた後に移動装置によって撤去橋桁１０を移動させる装置を備えることを妨げない。撤去橋桁１０の撤去にあたり、装置のトラブルが起きても確実に撤去が実施できることが必要なので、多重のジャッキアップ方法や移動方法を備える意味でこの様な設備を持つことはメリットとして考えられる。更に、特許文献２に示される様な大型桁を吊り上げた上で分割撤去する場合にも応用が可能である。   Further, in the present embodiment, the CH-type jack 126 is fixed to the work girder 120 to raise and lower the hanging steel rod 125, but a moving device is provided on the upper surface of the work girder 120, and the CH-type jack 126 is attached to the moving device. It does not prevent the provision of a device for moving the removal bridge girder 10 by a moving device after fixing and lifting the removal bridge girder 10 with the suspension steel rod 125. When removing the bridge bridge girder 10, it is necessary to be able to surely perform the removal even if a trouble occurs in the device, so it is considered to be advantageous to have such equipment in the sense of having multiple jack-up methods and moving methods. Further, it can be applied to a case where a large girder as shown in Patent Document 2 is lifted and then divided and removed.

１０ 撤去橋桁
２０ 軌道
４５ 送り装置
４６ 仮受台
５０ 跨線道
５１ 橋梁
１０１ 第１ユニットキャリア
１０２ 第２ユニットキャリア
１０３ 第３ユニットキャリア
１０６ 第１ユニットジャッキ
１０７ 第２ユニットジャッキ
１０８ 第３ユニットジャッキ
１２０ 工事桁
１２０Ａ 延長桁
１２５ 吊鋼棒
１２６ ＣＨ型ジャッキ
１３０ カウンタウェイト
１５０ 仮受台 10 Removal bridge girder 20 Track 45 Feeder 46 Temporary receiving stand 50 Overpass 51 Bridge 101 First unit carrier 102 Second unit carrier 103 Third unit carrier 106 First unit jack 107 Second unit jack 108 Third unit jack 120 Construction Girder 120A Extension girder 125 Hanging steel rod 126 CH type jack 130 Counter weight 150 Temporary pedestal

Claims (2)

独立して高さ調整可能な走行輪を複数有する多軸台車と、
撤去橋桁を吊り下げ可能な工事桁と、
工事桁及び撤去橋桁をジャッキアップ可能な扛重装置と、を有し、
前記工事桁は、前記多軸台車の上に保持される前記扛重装置で支持され、
前記多軸台車で、前記工事桁を撤去橋桁の上空まで搬送し、
前記工事桁と前記撤去橋桁を鋼棒で繋ぎ、前記工事桁にて前記撤去橋桁を保持し、
前記扛重装置で、前記工事桁をジャッキアップし、
前記多軸台車を移動する事で、前記撤去橋桁を設置場所から移動させること、
複数の前記多軸台車は、第１多軸台車及び第２多軸台車を含み、
前記第１多軸台車と前記第２多軸台車とで一端側を保持される前記工事桁は、他端を仮受台に預けて支持され、
前記第２多軸台車を前記仮受台のある位置に移動し、前記他端を前記仮受台から前記第２多軸台車に預け、
前記第１多軸台車と前記第２多軸台車にそれぞれ備えられる扛重装置で、前記工事桁をジャッキアップすることで、
前記工事桁に保持させた前記撤去橋桁を吊り上げ、
前記第１多軸台車と前記第２多軸台車によって前記撤去橋桁を移動させることで、前記撤去橋桁を設置場所から移動させること、
を特徴とする橋梁撤去方法。 A multi-axle bogie having a plurality of independently adjustable height wheels,
With a construction girder that can hang the removed bridge girder,
With a lifting device that can jack up construction girders and removal bridge girders,
The work girder is supported by the lifting device held on the multi-axle carriage,
With the multi-axle trolley, transport the construction girder to the sky above the removed bridge girder,
Connecting the construction girder and the removal bridge girder with a steel rod, holding the removal girder at the construction girder,
With the lifting device, jack up the work girder,
By moving the multi-axle dolly, moving the removal bridge girder from the installation location,
A plurality of the multi-axle carriages include a first multi-axle carriage and a second multi-axle carriage,
The construction girder whose one end is held by the first multi-axle trolley and the second multi-axle trolley is supported by depositing the other end on a temporary pedestal.
Moving the second multi-axle dolly to a position where the temporary pedestal is present, depositing the other end from the tentative pedestal into the second multi-axle dolly,
By jacking up the work girders with a lifting device provided in each of the first multi-axial bogie and the second multi-axial bogie,
Lifting the removed bridge girder held on the construction girder,
Moving the removal bridge girder from the installation location by moving the removal bridge girder by the first multi-axle carriage and the second multi-axle carriage,
Bridge removal method characterized by. 独立して高さ調整可能な走行輪を複数有する多軸台車と、
撤去橋桁を吊り下げ可能な工事桁と、
工事桁及び撤去橋桁をジャッキアップ可能な扛重装置と、を有し、
前記工事桁は、前記多軸台車の上に保持される前記扛重装置で支持され、
前記多軸台車で、前記工事桁を撤去橋桁の上空まで搬送し、
前記工事桁と前記撤去橋桁を鋼棒で繋ぎ、前記工事桁にて前記撤去橋桁を保持し、
前記扛重装置で、前記工事桁をジャッキアップし、
前記多軸台車を移動する事で、前記撤去橋桁を設置場所から移動させること、
複数の前記多軸台車は、第１多軸台車と第２多軸台車及び第３多軸台車を含み、
前記第１多軸台車と前記第２多軸台車とで一端側を保持される前記工事桁は、他端を仮受台に預けて支持され、
前記他端を前記仮受台から前記第３多軸台車に預け、
前記第２多軸台車と前記第３多軸台車にそれぞれ備えられる扛重装置で、前記工事桁をジャッキアップすることで、
前記工事桁に保持させた前記撤去橋桁を吊り上げ、
前記第２多軸台車と前記第３多軸台車によって前記撤去橋桁を移動させることで、前記撤去橋桁を設置場所から移動させること、
を特徴とする橋梁撤去方法。 A multi-axle bogie having a plurality of independently adjustable height wheels,
With a construction girder that can hang the removed bridge girder,
With a lifting device that can jack up construction girders and removal bridge girders,
The work girder is supported by the lifting device held on the multi-axle carriage,
With the multi-axle trolley, transport the construction girder to the sky above the removed bridge girder,
Connecting the construction girder and the removal bridge girder with a steel rod, holding the removal girder at the construction girder,
With the lifting device, jack up the work girder,
By moving the multi-axle dolly, moving the removal bridge girder from the installation location,
The plurality of multi-axle trucks include a first multi-axle truck, a second multi-axle truck, and a third multi-axle truck,
The construction girder whose one end is held by the first multi-axle trolley and the second multi-axle trolley is supported by depositing the other end on a temporary pedestal.
Depositing the other end from the temporary cradle to the third multi-axle trolley,
By jacking up the work girders with a lifting device provided in each of the second multi-axle truck and the third multi-axle truck,
Lifting the removed bridge girder held on the construction girder,
Moving the removal bridge girder by moving the removal bridge girder by the second multi-axle carriage and the third multi-axle carriage,
Bridge removal method characterized by.
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