JPH10131520A - Disassembling method of storage tank - Google Patents
Disassembling method of storage tankInfo
- Publication number
- JPH10131520A JPH10131520A JP30423096A JP30423096A JPH10131520A JP H10131520 A JPH10131520 A JP H10131520A JP 30423096 A JP30423096 A JP 30423096A JP 30423096 A JP30423096 A JP 30423096A JP H10131520 A JPH10131520 A JP H10131520A
- Authority
- JP
- Japan
- Prior art keywords
- side plate
- storage tank
- girder
- wind girder
- work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Movable Scaffolding (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、鋼製円筒形の側
板周壁を有する大型の貯槽、例えばガソリン、原油等を
貯蔵する貯槽の解体工法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of dismantling a large storage tank having a cylindrical peripheral wall of a steel plate, for example, a storage tank for storing gasoline, crude oil and the like.
【０００２】[0002]
【従来の技術】鋼製円筒形の側板周壁を有する大型の貯
槽は、一部を切り欠いて示した正面説明図の図６に、そ
の概略構造を示したように、有底円筒形貯槽３１の周壁
３２の上部全周に亙って、その周壁３２が強風等で変形
したり、座屈したりしないように、外方に延出して形成
した鍔状補強材のウィンドガーダー３３が、ブラケット
３４で支持されかつ周壁３２に溶接固着されている。図
６の貯槽３１は、１個のウィンドガーダー３３を有する
浮屋根式貯槽を例示したもので、ガソリン、原油等の貯
蔵物を貯蔵する円筒形貯槽３１の内部に、貯蔵物の蒸発
を抑制しかつ雨水の侵入を防止する浮蓋の浮屋根が貯蔵
物の上に浮かばせて設けられている。これらの貯槽のう
ち、建設後長い年月を経過し老朽化した貯槽は、安全の
ために解体する必要が生じている。また、貯槽の用途変
更や立地条件等の変更によって、建て替えや解体撤去な
どの必要も生じている。2. Description of the Related Art A large-sized storage tank having a steel cylindrical side plate peripheral wall has a bottomed cylindrical storage tank 31 as shown in FIG. In order to prevent the peripheral wall 32 from being deformed or buckled by a strong wind or the like over the entire periphery of the upper part of the peripheral wall 32, a wind girder 33 of a flange-like reinforcing material formed to extend outward is provided on a bracket 34. And is fixed to the peripheral wall 32 by welding. The storage tank 31 in FIG. 6 is an example of a floating roof type storage tank having one wind girder 33, and suppresses evaporation of the storage inside a cylindrical storage tank 31 for storing storage such as gasoline and crude oil. In addition, a floating roof of a floating lid for preventing intrusion of rainwater is provided so as to float on the storage. Of these storage tanks, those that have passed a long time after construction and have become aging need to be dismantled for safety. In addition, changes in the use of storage tanks and changes in location conditions have created the need for rebuilding and dismantling.
【０００３】これらの貯槽を解体する場合、従来解体工
法の第１番目の一般的な工法としては、図示は省略する
が、まず円筒形貯槽の側板周壁の外周全体に総足場を仮
設し、その足場上で作業者が、側板周壁及びウィンドガ
ーダー等をガス切断等で切断してブロック化し、そのブ
ロック化した側板周壁及びウィンドガーダー等を吊り下
げ装置やクレーン等の重機で降下し、高所より順次下部
に向かって繰り返して解体し、上記仮設した総足場は、
この解体作業に従って順次撤去していくという解体工法
が採用されている。[0003] When dismantling these storage tanks, as the first general method of the conventional dismantling method, although not shown, first, a total scaffold is temporarily provided on the entire outer periphery of the side wall of the cylindrical storage tank. An operator cuts the side plate peripheral wall and wind girder etc. by gas cutting etc. on the scaffold and blocks it, and descends the blocked side plate peripheral wall and wind girder etc. with heavy equipment such as a hanging device or crane, and It is dismantled repeatedly in order toward the bottom, and the temporary scaffolding
A dismantling method is adopted in which the dismantling work is sequentially performed in accordance with the dismantling work.
【０００４】また、第２番目の従来解体工法として、同
じく図示を省略するが、周壁の最上部からクレーン等の
上で、周壁を渦巻き状ラインに沿って所定幅に順次切断
していく切断工程と、切断工程の後又はこれに並行し
て、前記切断した部位の上部周壁から渦巻き状に連続し
た切断帯を順次下方へ引き下げつつ、地上所定位置にて
連続した細長い切断帯を所定間隔の短冊状に裁断してい
く工程により、あたかもリンゴの皮を剥いていくように
周壁を所定幅で引き剥がしつつ、その先端部を地上で短
く裁断し解体していく方法もある。[0004] As a second conventional dismantling method, although not shown, a cutting step of sequentially cutting the peripheral wall to a predetermined width along a spiral line on a crane or the like from the top of the peripheral wall. After or in parallel with the cutting step, while successively pulling down the spirally continuous cutting band from the upper peripheral wall of the cut portion sequentially downward, strips of continuous elongated cutting bands at predetermined positions on the ground are strips at predetermined intervals. There is also a method in which the tip is cut short on the ground and dismantled while the peripheral wall is peeled off at a predetermined width as if peeling the apple by the step of cutting in the shape of an apple.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述の
ような従来解体工法においては、第１番目の一般的な従
来工法では、解体する貯槽の全周に亙って総足場を仮設
して側板周壁を切断撤去して解体しなければならないの
で、大掛かりで部材数の多い複雑な足場を必要とし、総
足場の組立て仮設作業及び解体撤去作業が繁雑で、時間
もかかり作業能率の低下を余儀なくされ、また、貯槽周
壁の解体作業と足場の解体撤去作業等が並行するため、
作業の安全性にもかなりの配慮が必要となった。However, in the conventional dismantling method as described above, in the first general conventional method, a total scaffold is temporarily provided along the entire periphery of the storage tank to be dismantled, and the side plate peripheral wall is provided. Must be cut and removed and dismantled, requiring large-scale and complex scaffolds with many members, and assembling and temporarily disassembling and disassembling the total scaffolds, complicating time, reducing the work efficiency, In addition, since the dismantling work of the storage tank peripheral wall and the dismantling and removal work of the scaffold are performed in parallel,
Considerable work safety was also required.
【０００６】また、第２番目のリンゴの皮剥きのように
切断する従来解体工法は、クレーン等の上で切断作業を
行う場合は、貯槽全周に亙ってクレーン等重機の移動す
る広い場所が必要で、周囲が狭い場合や周囲に他の設備
が隣接している場合は施工が困難になる問題、クレーン
等を常駐させるためその費用が多くかかる問題、クレー
ン等の上での不安定な切断作業のため安全性の問題等が
あった。In the second conventional dismantling method for cutting apples like peeling, when a cutting operation is performed on a crane or the like, a wide place where a heavy machine such as a crane moves over the entire circumference of the storage tank. If the surrounding area is narrow or other equipment is adjacent to the surrounding area, construction becomes difficult. There were safety issues due to the cutting work.
【０００７】この発明は、上述のような従来技術が有す
る問題点に鑑みてなされたもので、解体する貯槽周壁の
全周に亙って大掛かりで、組立てと解体が繁雑な総足場
を仮設する必要がなく、また貯槽の全周に亙るクレーン
等重機が移動する広い場所の必要がなく、クレーン等の
重機上での不安定な作業もなく、かつ作業能率が低下す
ることもないように、解体する貯槽のウィンドガーダー
を解体用の作業足場に有効利用した貯槽の解体工法を提
供するものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and temporarily constructs a total scaffold that is complicated to assemble and disassemble over the entire circumference of a storage tank peripheral wall to be dismantled. There is no need for a large place where the heavy equipment such as a crane moves around the storage tank, and there is no need for unstable work on heavy equipment such as a crane, and the working efficiency is not reduced. An object of the present invention is to provide a method of dismantling a storage tank in which a wind girder of the storage tank to be dismantled is effectively used as a working scaffold for dismantling.
【０００８】[0008]
【課題を解決するための手段】この発明に係る貯槽の解
体工法は、解体する貯槽のウィンドガーダーを支持した
状態で、この支持状態のウィンドガーダーを貯槽側板か
ら切断分離し、その切断分離したウィンドガーダーを下
降可能な作業足場に利用して、側板上部を切断撤去し、
次いで、このウィンドガーダーを所定高さ分だけ降下さ
せ、その降下したウィンドガーダーを再び作業足場に利
用して、上記降下させた所定高さ分の側板上部を再び切
断撤去し、上記ウィンドガーダーを降下する工程と上記
作業足場利用により降下した分の側板上部を切断撤去す
る工程の繰り返しで上方から下方に向けて順次解体する
もので、大掛かりで繁雑な総足場、貯槽周囲の広い作業
場所、大掛かりな機械装置などを必要とすることなく、
効率良く短期間にかつ安全に施工するものである。According to a method of dismantling a storage tank according to the present invention, a wind girder of a storage tank to be dismantled is supported, and the supported wind girder is cut and separated from a storage tank side plate. Using the girder as a work platform that can be lowered, cut and remove the upper side plate,
Next, the wind girder is lowered by a predetermined height, and the lowered wind girder is again used as a work scaffold, and the upper part of the side plate of the lowered predetermined height is again cut and removed, and the wind girder is lowered. The process of cutting and removing the upper part of the side plate that has been lowered by using the work scaffold is dismantled sequentially from the top to the bottom, and it is a large and complicated total scaffold, a large work space around the storage tank, a large work space Without the need for mechanical equipment
It can be done efficiently and in a short time and safely.
【０００９】また、この発明に係る貯槽の解体工法は、
解体する貯槽の側板上部全周に隔接間隔をもって複数の
引掛けサポートを取付け、かつ解体する貯槽側板に固着
されているウィンドガーダーの上面に上記引掛けサポー
トと対応させて複数の吊りピースを取付け、その吊りピ
ースと上記引掛けサポートとの間に吊り下げ機を取付け
てウィンドガーダーを吊り下げ支持し、その吊り下げ支
持状態のウィンドガーダーと上記解体する貯槽側板との
固着部を切断分離し、その切断分離したウィンドガーダ
ーを下降可能な作業足場に利用して、上記複数の引掛け
サポートのうちの一つ又は幾つかを側板上部から取り外
し、その引掛けサポートが取り外された所の側板部を部
分切断撤去する工程と、その側板部が部分切断撤去され
た後の側板の上部に、上記取り外しておいた上記引掛け
サポートを掛け変え、その引掛けサポートと元の吊りピ
ースとの間に吊り下げ間隔を縮めて元の吊り下げ機を戻
し取付けてウィンドガーダーを元の吊り下げ支持状態に
復旧する工程を施工した後、上記吊り下げ機を操作して
上記吊り下げ支持状態のウィンドガーダーを所定高さ分
だけ降下させ、その降下したウィンドガーダーを再び作
業足場に利用して、上記工程の繰り返しで上方から下方
に向けて順次解体するもので、大掛かりで繁雑な総足
場、貯槽周囲の広い作業場所、大掛かりな機械装置、仮
足場固定用の繁雑な固着治具などを必要とすることな
く、効率良く短期間にかつ安全に施工するものである。[0009] The method for dismantling a storage tank according to the present invention includes:
A plurality of hooking supports are attached at intervals around the upper part of the side plate of the tank to be dismantled, and a plurality of hanging pieces are attached to the upper surface of the wind girder fixed to the side plate of the tank for disassembly in correspondence with the above-mentioned hooking support. A hanging machine is attached between the hanging piece and the hanging support to suspend and support the wind girder, and cut off and separate the fixing portion between the suspended wind girder and the storage tank side plate to be disassembled. Using the cut and separated wind girder as a work platform that can be lowered, one or several of the plurality of hanging supports are removed from the upper side plate, and the side plate portion where the hanging support is removed is removed. Partial cutting and removing step, and hanging the above-mentioned hooking support removed on the upper part of the side plate after the side plate part is partially cut and removed. , After installing the process of shortening the suspension interval between the hooking support and the original suspension piece, returning the original suspension machine to the original state, and restoring the wind girder to the original suspended support state, The machine is operated to lower the suspended and supported wind girder by a predetermined height, and the lowered girder is again used as a work scaffold, and is sequentially disassembled downward from above by repeating the above steps. Work efficiently and in a short time and safely without the need for large and complicated total scaffolds, large work areas around storage tanks, large-scale machinery and complicated fixing jigs for fixing temporary scaffolds Things.
【００１０】さらにまた、この発明に係る貯槽の解体工
法は、上記解体する貯槽のウィンドガーダーを下降可能
な作業足場として、分割することなく全体として使用す
るか、或は複数に分割して各個別に使用するもので、上
記作業足場を全体として使用する場合には、同じ高さ位
置での側板の切断作業を貯槽全周に亙って安全に施工す
るもので、或は上記作業足場を複数に分割して使用する
場合には、切断作業を行う個所を多くしかつ各作業を独
立させるなどして効率良く短期間に施工するものであ
る。Still further, in the method for dismantling a storage tank according to the present invention, the wind girder of the storage tank to be dismantled may be used as a work platform which can be lowered without dividing the entirety, or may be divided into a plurality of pieces and each divided into a plurality of individual pieces. When the above-mentioned work scaffold is used as a whole, the cutting work of the side plate at the same height position is to be performed safely over the entire circumference of the storage tank, or the work scaffold is used in plural. In the case of using in a divided manner, the number of places where the cutting operation is performed is increased, and each operation is performed independently, thereby efficiently performing the operation in a short time.
【００１１】[0011]
【発明の実施の形態】この発明に係る貯槽の解体工法の
実施形態の一例の概要を、図１及至図５に基づいて説明
する。例示した貯槽１は、鋼製の有底直立円筒形に形成
され、この貯槽１の側板２の上部全周に亙って、外方に
延出した鍔状のウィンドガーダー３が固着されている。
このウィンドガーダー３の下部は、隔接間隔をおいた複
数個のブラケット４によって支持されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An outline of an embodiment of a storage tank dismantling method according to the present invention will be described with reference to FIGS. The illustrated storage tank 1 is formed in an upright cylindrical shape with a steel bottom, and a flange-shaped wind girder 3 extending outward is fixed over the entire upper periphery of the side plate 2 of the storage tank 1. .
The lower part of the wind girder 3 is supported by a plurality of brackets 4 spaced apart from each other.
【００１２】図１に示すように、貯槽１の側板２を解体
するにあたり、側板２の上端縁部全周に、隔接間隔をも
って複数の引掛けサポート５を取付ける。また、解体す
る側板２に固着されている既設のウィンドガーダー３の
上面には、上記の各引掛けサポート５と対応させて複数
の吊りピース６を取付け、その吊りピース６と引掛けサ
ポート５との間に吊り下げ機７を懸け渡し取付ける。続
いて、ウィンドガーダー３と側板２との固着部１１、及
びブラケット４と側板２との固着部２１を切断して側板
２から分離し、上記吊り下げ機７でウィンドガーダー３
及びブラケット４等の全荷重を吊り下げ支持状態にす
る。このように支持されたウィンドガーダー３は、側板
２の上部から吊り下げられた下降可能な作業足場８とな
る。As shown in FIG. 1, when the side plate 2 of the storage tank 1 is disassembled, a plurality of hooking supports 5 are attached to the entire periphery of the upper edge of the side plate 2 at intervals. Also, a plurality of hanging pieces 6 are attached to the upper surface of the existing wind girder 3 fixed to the side plate 2 to be disassembled in correspondence with each of the above-mentioned hanging supports 5, and the hanging pieces 6 and the hanging supports 5 are attached. The suspension machine 7 is suspended and mounted between the two. Subsequently, the fixing portion 11 between the wind girder 3 and the side plate 2 and the fixing portion 21 between the bracket 4 and the side plate 2 are cut and separated from the side plate 2.
And all the loads of the bracket 4 and the like are suspended and supported. The wind girder 3 supported in this manner becomes a work platform 8 that can be lowered and suspended from the upper part of the side plate 2.
【００１３】上記作業足場８の上にて、側板２の上部全
周に亙って設けた複数の引掛けサポート５，５・・・の
内の一つの引掛けサポート５Ａ（図の一点鎖線で示す）
を側板２上部から取り外し、その引掛けサポート５Ａが
取り外された所の側板部９（図の一点鎖線で示す）を部
分切断し、この側板部９を矢印で示すように貯槽１の内
部に降下し撤去する。次に上記取り外しておいた引掛け
サポート５Ａは、上記部分切断撤去された後の側板部９
下部位置の側板２上端部に再度掛け変え、その引掛けサ
ポート５Ａと元の吊りピース６との間に吊り下げ間隔を
縮めて元の吊り下げ機７を戻し取付けて、ウィンドガー
ダー３の作業足場８を元の吊り下げ支持状態に復旧す
る。On the work platform 8, one of a plurality of hooking supports 5, 5... Provided on the entire periphery of the upper part of the side plate 2 (indicated by a chain line in FIG. Show)
Is removed from the upper portion of the side plate 2 and the side plate portion 9 (shown by a dashed line in the figure) where the hooking support 5A is removed is partially cut, and the side plate portion 9 is lowered into the storage tank 1 as shown by an arrow. And remove it. Next, the hooking support 5A that has been removed is attached to the side plate 9 after the partial cutting and removal.
Re-hang the upper end of the side plate 2 at the lower position, shorten the hanging interval between the hooking support 5A and the original hanging piece 6, and return and attach the original hanging machine 7 to the work scaffold of the wind girder 3. 8 is restored to the original suspended support state.
【００１４】なお、図１及び後述する図４では、切断す
る側板部９一箇所に対応して引掛けサポート５を一つ取
付けた場合を示したが、ウィンドガーダー３の荷重の大
小、或は側板部９の幅の大小などに応じて、隣合う引掛
けサポート５，５の間隔は広くするか又は狭める。ま
た、側板部９の切断においても、引掛けサポート５，５
間をさらに複数の側板部９，９に分けて切断するか、或
は隣接する複数の引掛けサポート５，５・・・を取り外
しその部分の側板部９を大きく切断し、作業能率の向上
が図れるように施工する。これらの作業はウィンドガー
ダー３上を作業足場８として、貯槽１の上部側板２の水
平方向全周に亙って順次繰り返して行う。なおこの切断
作業は、貯槽１の外側から行うので、切断火花や切断片
等は貯槽１内部に向けて落ちるため、貯槽１外部周辺に
切断火花等が飛散することがなく、例え周囲に他の設備
等が隣接していても、より安全な解体作業を行うことが
できる。Although FIG. 1 and FIG. 4 to be described later show a case where one hooking support 5 is attached to one side plate 9 to be cut, the magnitude of the load on the wind girder 3 or Depending on the width of the side plate 9 or the like, the distance between the adjacent hooking supports 5 and 5 is increased or decreased. Also, in the cutting of the side plate portion 9, the hooking supports 5, 5 are provided.
The space is further divided into a plurality of side plate portions 9, 9 or the adjacent plurality of hooking supports 5, 5,... Are removed, and the side plate portions 9 in that portion are largely cut, thereby improving work efficiency. Work as planned. These operations are sequentially and repeatedly performed over the entire circumference of the upper side plate 2 of the storage tank 1 in the horizontal direction, with the wind girder 3 serving as the work scaffold 8. Since this cutting operation is performed from the outside of the storage tank 1, the cutting sparks and pieces are dropped toward the inside of the storage tank 1, so that the cutting sparks and the like do not scatter around the outside of the storage tank 1. Even when equipment and the like are adjacent to each other, safer dismantling work can be performed.
【００１５】図１の一部を拡大した図２に基づいて、ウ
ィンドガーダー３を降下可能な作業足場８に形成する手
順等についてさらに詳述する。図２に例示するように、
側板２上端のトップアングル等の補強材や付属部材など
を除去した側板上端縁１０に、引掛けサポート５を取付
け固定する。この引掛けサポート５は、図２のように引
掛けサポート５に平行な溝を設け、この溝に側板上端縁
１０を平行に挿入し引掛け固定する構造に形成する。な
お、引掛けサポート５は、クランプ等による締付け構
造、ボルト・ナット等の螺着構造等で形成し、着脱が簡
単自在で、かつ使用中に外れることのない丈夫な構造で
形成した取付け部材を使用してもよい。上記の引掛けサ
ポート５には吊り用の貫通穴や突起部等を設け、この貫
通穴等に対応して、その直下でウィンドガーダー３の上
面に、吊り用の貫通穴や突起部等を設けた角コマやリン
グなどで形成した吊りピース６を固着し、この引掛けサ
ポート５と吊りピース６の各穴等の間に、吊り下げ機７
上下の各鉤状フック等を係合し吊り下げ機７を取付け
る。この吊り下げ機７は手動で個別に操作するチェーン
ブロック等の手動巻き上げ機を使用するか、或は電動ウ
インチ、電動ホイスト等で一括操作する連動索引装置を
使用する。この吊り下げ機７でウィンドガーダー３や作
業者等の荷重を支えて吊り下げ支持状態にした後に、ウ
ィンドガーダー３と側板２との固着部１１、及びブラケ
ット４と側板２との固着部２１をそれぞれ切断分離す
る。The procedure for forming the wind girder 3 on the work platform 8 which can be lowered will be described in further detail with reference to FIG. As illustrated in FIG.
The hooking support 5 is attached and fixed to the upper edge 10 of the side plate from which the reinforcing material such as the top angle at the upper end of the side plate 2 and the attached members are removed. As shown in FIG. 2, the hooking support 5 has a groove parallel to the hooking support 5, and has a structure in which the upper edge 10 of the side plate is inserted in parallel with the groove and hooked and fixed. In addition, the hooking support 5 is formed by a fastening structure using a clamp or the like, a screwing structure such as a bolt or a nut, or the like, and is a mounting member formed by a strong structure that can be easily attached and detached and does not come off during use. May be used. The hooking support 5 is provided with a through hole or a projection for suspension, and a through hole or projection for suspension is provided on the upper surface of the wind girder 3 immediately below the through hole or the like. A hanging piece 6 formed of a square top or a ring is fixed, and a hanging machine 7 is provided between the hooking support 5 and each hole of the hanging piece 6.
The hanging machine 7 is mounted by engaging the upper and lower hooks and the like. The hanging machine 7 uses a manual hoist such as a chain block that is individually operated manually, or uses an interlocking index device that is operated collectively by an electric winch, an electric hoist, or the like. After supporting the load of the wind girder 3 and the worker by the suspending machine 7 to make the suspension support state, the fixing portion 11 between the wind girder 3 and the side plate 2 and the fixing portion 21 between the bracket 4 and the side plate 2 are removed. Cut and separate each.
【００１６】この切断分離作業は、図２に示すように、
ウィンドガーダー３と側板２との固着部１１（一点鎖線
で示す）は、ウィンドガーダー３の上方からガウジング
やガス切断等で行い、ブラケット４と側板２との固着部
２１（密なハッチングで示す）は、ウィンドガーダー３
に架設したゴンドラ１７等を使用して、ウィンドガーダ
ー３の下方からガウジング等で行うようにする。なお、
このゴンドラ１７は、図２に例示するように、ウィンド
ガーダー３の鍔状の上端縁部を走行用のガイドレール１
４に使用し、このガイドレール１４にゴンドラ１７上方
の湾曲した上部アーム１８先端部の上部動輪１５を当接
係合させ、また側板２にゴンドラ１７下方の湾曲した下
部支端縁１９の下部動輪１６を当接させる。このように
架設したゴンドラ１７を、ウィンドガーダー３に沿って
貯槽１の側板２の周方向に沿って移動し、内部の作業床
２０を使用して、上記ブラケット４と側壁２との固着部
２１を切断分離する。また図３に示すように、ブラケッ
ト４の固着部下端縁２１Ａに下部ガイドローラー１３を
取付ける場合には、その取付け作業等にもこのゴンドラ
１７を使用する。This cutting and separating operation is performed as shown in FIG.
The fixing part 11 (shown by a dashed line) of the wind girder 3 and the side plate 2 is performed by gouging or gas cutting from above the wind girder 3 and the fixing part 21 of the bracket 4 and the side plate 2 (shown by dense hatching). Is Wind Guarder 3
Using a gondola 17 and the like installed on the wind girder 3, gouging is performed from below the wind girder 3. In addition,
As shown in FIG. 2, the gondola 17 guides the guide rail 1 for traveling on the flange-shaped upper edge of the wind girder 3.
The upper driving wheel 15 at the tip of the curved upper arm 18 above the gondola 17 is brought into contact with the guide rail 14 and the lower driving wheel of the curved lower supporting edge 19 below the gondola 17 is attached to the side plate 2. 16 is brought into contact. The gondola 17 erected in this way is moved along the wind girder 3 along the circumferential direction of the side plate 2 of the storage tank 1, and using the internal work floor 20, the fixing portion 21 between the bracket 4 and the side wall 2 is used. Cut to separate. In addition, as shown in FIG. 3, when the lower guide roller 13 is attached to the lower end edge 21A of the fixing portion of the bracket 4, the gondola 17 is also used for the attachment work and the like.
【００１７】図３に示した作業足場８の事例は、ウィン
ドガーダー３を吊り下げ機７によって降下する際に、側
板２にウィンドガーダー３が当たって大きな摩擦抵抗を
生じないように、上記切り離した固着部端縁１１Ａの近
傍でウィンドガーダー３の上端部に、側板２と当接する
上部ガイドローラー１２を取付け、またブラケット４の
固着部下端縁２１Ａに、側板２と当接する下部ガイドロ
ーラー１３を取付けた場合を示す。このように形成した
作業足場８は、作業足場８全体を一斉に降下させる際
に、上部ガイドローラー１２と下部ガイドローラー１３
によって、水平維持され、一層円滑に行うことができ
る。なお、ウィンドガーダー３上部外周縁に手摺が設け
られていない場合には、図のように手摺２２等を設け
て、作業足場８上での作業の安全を図る。In the case of the work scaffold 8 shown in FIG. 3, the wind girder 3 is separated so that the wind girder 3 does not hit the side plate 2 when the wind girder 3 is lowered by the hanging machine 7, so that a large frictional resistance is generated. An upper guide roller 12 that comes into contact with the side plate 2 is attached to the upper end of the wind girder 3 near the fixing portion edge 11A, and a lower guide roller 13 that makes contact with the side plate 2 is attached to the fixing portion lower edge 21A of the bracket 4. This is shown. The working scaffold 8 formed in this way is used to lower the upper guide roller 12 and the lower guide roller 13 when the entire working scaffold 8 is simultaneously lowered.
Thereby, it can be maintained horizontally and can be performed more smoothly. In the case where no handrail is provided on the outer peripheral edge of the upper part of the wind girder 3, a handrail 22 or the like is provided as shown in FIG.
【００１８】図４は、図１乃至図３で詳述したように、
ウィンドガーダー３を連続した一体の作業足場８に形成
し、その作業足場８上で、貯槽１の側板２上部を周方向
に向かって順次切断除去している状態、つまり図４の一
点鎖線で示す側板部９を切断分離し貯槽１の内側に降下
解体している状態を示している。この切断作業は、引掛
けサポート５、吊りピース６、並びに吊り下げ機７等の
設置個数及び設置間隔と強度、作業足場８の平衡バラン
ス、作業能率、或は安全性などを配慮して、図４のよう
に側板２の外周一方向に向かって順次施工するか、一つ
又は幾つか置き毎に施工するか、或は円周対称位置の複
数個所で同時施工するようにする。FIG. 4 is a detailed view of FIG. 1 to FIG.
A state in which the wind girder 3 is formed on a continuous and integral work scaffold 8 and the upper portion of the side plate 2 of the storage tank 1 is sequentially cut and removed in the circumferential direction on the work scaffold 8, that is, shown by the dashed line in FIG. A state is shown in which the side plate portion 9 is cut and separated and dismantled inside the storage tank 1. This cutting work is performed in consideration of the number of installations, the installation intervals and strength of the hooking support 5, the hanging pieces 6, the hanging machines 7, etc., the equilibrium balance of the work scaffold 8, the work efficiency, or the safety. As shown in FIG. 4, the work is performed sequentially in one direction on the outer periphery of the side plate 2, is performed every other or several places, or is performed simultaneously at a plurality of circumferentially symmetric positions.
【００１９】図５は、図４の側板２上部全周に亙って切
断除去終了した後の状態を示す。さらに続いて、図５の
一体の作業足場８上で全部の吊り下げ機７，７・・・を
一斉に操作し、上記吊り下げ支持状態のウィンドガーダ
ー３全体を、図５の一点鎖線に示す所定の高さ位置まで
水平かつ円滑に一斉降下させる。この一斉降下したウィ
ンドガーダー３を、再び作業足場８に利用し、上記降下
させた所定高さ分の側板２上部の切断除去作業を再び側
板２全周に亙って行う。このように図４に示す工程と図
５に示す工程を、貯槽１の上方から下方に亙って順次繰
り返して貯槽１の側壁２を解体していく。FIG. 5 shows a state after cutting and removing are completed over the entire periphery of the upper portion of the side plate 2 of FIG. Subsequently, all the suspenders 7, 7,... Are operated at the same time on the integrated work platform 8 of FIG. 5, and the entire wind girder 3 in the suspended and supported state is shown by a dashed line in FIG. It descends horizontally and smoothly all the way to a predetermined height. The wind girder 3 which has descended all at once is used again as the work scaffold 8, and the work of cutting and removing the upper part of the side plate 2 for the predetermined height which has been lowered is performed again over the entire periphery of the side plate 2. In this way, the steps shown in FIG. 4 and the steps shown in FIG. 5 are sequentially repeated from above to below the storage tank 1 to disassemble the side wall 2 of the storage tank 1.
【００２０】この図４及び図５に示す解体手順のよう
に、側板２上部を外周水平方向リング状に一括切断した
後、ウィンドガーダー３を分割することなく全体として
水平一体の作業足場８に使用し、次いでこの作業足場８
の全体を一斉降下して使用する解体工法は、水平方向リ
ング状に移動しながら一連の解体作業が行われ、次に一
斉降下して同様の作業が行われ、水平リング状に一括施
工するので作業が統一され円滑でやり易くなり、また水
平に連続した作業足場８上での水平移動作業のため上下
の作業が交錯することなく安全性が向上する。As shown in FIGS. 4 and 5, after the upper portion of the side plate 2 is collectively cut into an outer peripheral horizontal ring shape, the wind girder 3 is used as a whole horizontally integrated work platform 8 without being divided. And then this working scaffold 8
In the demolition method of using the whole of the whole body at once, a series of demolition work is performed while moving in a horizontal ring shape, then the same work is performed simultaneously and the batch construction is done in a horizontal ring shape The work is unified, smooth and easy to carry out, and the horizontal movement work on the horizontally continuous work scaffold 8 improves the safety without crossing up and down work.
【００２１】また、上記図４及び図５に示すようなウィ
ンドガーダー３全体を水平一体の作業足場として使用す
る方法ではなく、ウィンドガーダー３を複数分割し複数
の作業足場８に使用する場合には、各左右に隣接する作
業足場８上の解体作業に制約されることなく独立任意に
垂直方向に作業を進行することができるので、短期間に
効率よく解体することができる。なお、配管等の付属部
材がある側板２の部分については、それらの解体撤去作
業を先行して施工すれば、作業順序や施工時期などが適
宜調整されてさらに効率良く短期間に施工することが可
能となる。Instead of using the entire wind girder 3 as a horizontally integrated work scaffold as shown in FIG. 4 and FIG. 5, when the wind girder 3 is divided into a plurality and used for a plurality of work scaffolds 8, Since the work can be independently and arbitrarily advanced in the vertical direction without being restricted by the dismantling work on the work scaffold 8 adjacent to each left and right, the dismantling can be efficiently performed in a short time. In addition, if the disassembly and removal work is performed in advance for the portion of the side plate 2 having the attached members such as pipes, the work sequence and the construction time are appropriately adjusted, so that the work can be more efficiently performed in a shorter time. It becomes possible.
【００２２】[0022]
【発明の効果】叙述のように、この発明に係る貯槽の解
体工法は、ウィンドガーダーを貯槽の側板から切断分離
して解体用の作業足場に使用し、その作業足場上で側板
を切断撤去し、順次この作業足場を降下させながら貯槽
を解体していくので、解体する貯槽周壁の全周に亙って
大掛かりで繁雑な総足場を仮設する必要がない。また、
作業足場を降下させる際にも側板から分離しているため
に降下作業が容易である。また、新たな作業足場や解体
用の大型機械装置を常設する必要がないので、仮設機材
の費用が少ない上、作業効率が良く解体施工が短期間に
できる。また、貯槽の全周に亙って広い作業場所を必要
としない。なお、上記側板の切断作業は貯槽の外側から
行うので、切断火花等は貯槽内部に落ちるため、貯槽外
部の周辺に飛散することがなく、例え周囲に他の設備が
隣接していても、安全な切断解体撤去作業ができる。As described above, in the storage tank dismantling method according to the present invention, the wind girder is cut off from the side plate of the storage tank and used as a work scaffold for dismantling, and the side plate is cut and removed on the work scaffold. Since the storage tank is dismantled while sequentially lowering the work scaffold, there is no need to temporarily install a large and complicated total scaffold over the entire circumference of the tank peripheral wall to be dismantled. Also,
Even when the work scaffold is lowered, it is easy to descend because it is separated from the side plate. Further, since there is no need to permanently install a new work scaffold or a large-sized machine for dismantling, the cost of temporary equipment is low, and work efficiency is good and dismantling can be performed in a short time. Also, there is no need for a large work space all around the storage tank. In addition, since the cutting work of the side plate is performed from the outside of the storage tank, the cutting sparks fall into the storage tank, so that they do not scatter around the outside of the storage tank. It is possible to perform cutting and dismantling removal work.
【００２３】また、解体する貯槽の側板上部に引掛けサ
ポートを取付け、この引掛けサポートと吊り下げ機でウ
ィンドガーダーを吊り下げ支持し、これらの掛け変えに
より作業足場を使用する解体工法は、作業足場を固定す
るための治具等の仮設、解体撤去などの繁雑な作業がな
いので、効率良くかつ安全に下降移動して解体作業施工
ができる。A disassembly method using a work scaffold by attaching a hooking support to an upper portion of a side plate of a storage tank to be dismantled, suspending and supporting a wind girder by the hooking support and a suspending machine, and changing these to use a work scaffold. Since there is no complicated work such as temporary installation of jigs for fixing the scaffolding and dismantling, dismantling work can be efficiently and safely moved down for dismantling work.
【００２４】上記ウィンドガーダーを分割することな
く、全体として水平一体に連続した作業足場に使用した
場合には、水平方向リング状に同じ高さ位置を移動しな
がら解体作業を行い、次に一斉にウィンドガーダーの作
業足場を降下させるので、作業が水平リング状に一括施
工で統一され円滑でやり易く、かつ作業足場に断続個所
がないので作業の安全性が図れる。When the above-mentioned wind girder is used for a work scaffold which is continuously and horizontally integrated without being divided, the dismantling work is performed while moving at the same height position in a horizontal ring shape, and then all at once. Since the work scaffold of the wind girder is lowered, the work is unified by batch construction in a horizontal ring shape, smooth and easy to carry out, and the work scaffold has no intermittent points, so work safety can be improved.
【００２５】また、上記ウィンドガーダーを複数に分割
して各個別の作業足場に使用した場合には、各左右に隣
接する作業足場上の解体作業に制約されることなく、独
立任意に垂直方向に解体作業を進行させて作業個所を多
くし、かつ付属品設置個所の施工時期などの適宜調整に
よって、効率良く短期間に施工することができる。Further, when the wind girder is divided into a plurality of parts and used for individual work platforms, the wind girder can be independently arbitrarily set in the vertical direction without being restricted by dismantling work on the left and right adjacent work platforms. The work can be efficiently performed in a short period of time by increasing the number of work places by progressing the dismantling work and appropriately adjusting the construction time of the accessory installation place.
【００２６】[0026]
【図１】 この発明に係る貯槽の解体工法の実施形態例
の概要を示す一部を欠除した斜視説明図である。FIG. 1 is a perspective explanatory view showing an outline of an embodiment of a storage tank dismantling method according to the present invention, with a part thereof being omitted.
【図２】 ウィンドガーダーにゴンドラを架設した状態
を示す概略説明図である。FIG. 2 is a schematic explanatory view showing a state in which a gondola is installed on a wind girder.
【図３】 図１の側板上部の一部を示し、ウィンドガー
ダーの作業足場にガイドローラーを設けた場合の側断面
概略説明図である。FIG. 3 is a schematic side cross-sectional explanatory view showing a part of an upper portion of the side plate of FIG. 1 when a guide roller is provided on a work scaffold of a wind girder.
【図４】 図１乃至図３の全体の概略を示す正面説明図
である。FIG. 4 is an explanatory front view schematically showing the whole of FIGS. 1 to 3;
【図５】 図４に続く工程の概略を示す正面説明図であ
る。FIG. 5 is an explanatory front view schematically showing a step following FIG. 4;
【図６】 貯槽の一部を切り欠いて概略構造を示した正
面説明図である。FIG. 6 is an explanatory front view showing a schematic structure with a part of the storage tank cut away.
１ 貯槽 ２ 側板 ３ ウィンドガーダー ４ ブラケット ５，５Ａ 引掛けサポート ６ 吊りピース ７ 吊り下げ機 ８ 作業足場 ９ 側板部 １０ 側板上端縁 １１ 固着部 １１Ａ 固着部端縁 １２ 上部ガイドローラー １３ 下部ガイドローラー １４ ガイドレール １５ 上部動輪 １６ 下部動輪 １７ ゴンドラ １８ 上部アーム １９ 下部支端縁 ２０ 作業床 ２１ 固着部 ２１Ａ 固着部下端
縁 ２２ 手摺 ３１ 貯槽 ３２ 周壁 ３３ ウィンドガーダー ３４ ブラケットDESCRIPTION OF SYMBOLS 1 Storage tank 2 Side plate 3 Wind girder 4 Bracket 5,5A Hanging support 6 Hanging piece 7 Hanging machine 8 Working scaffold 9 Side plate 10 Upper edge of side plate 11 Fixed part 11A Fixed part edge 12 Upper guide roller 13 Lower guide roller 14 Guide Rail 15 Upper driving wheel 16 Lower driving wheel 17 Gondola 18 Upper arm 19 Lower supporting edge 20 Work floor 21 Fixed part 21A Fixed part lower edge 22 Handrail 31 Storage tank 32 Perimeter wall 33 Wind girder 34 Bracket
Claims (3)
した状態で、このウィンドガーダーを貯槽側板から切断
分離し、その切断分離したウィンドガーダーを下降可能
な作業足場に利用して、側板上部を切断撤去し、次いで
ウィンドガーダーを所定高さ分だけ降下させ、その降下
したウィンドガーダーを再び作業足場に利用して、上記
降下させた所定高さ分の側板上部を再び切断撤去し、そ
のウィンドガーダーの降下と側板上部の切断撤去の工程
の繰り返しで上方から下方に向けて解体することを特徴
とする貯槽の解体工法。In a state where a wind girder of a storage tank to be dismantled is supported, the wind girder is cut and separated from a storage tank side plate, and the cut and separated wind girder is used as a work platform which can be lowered, and the upper part of the side plate is cut and removed. Then, the wind girder is lowered by a predetermined height, and the lowered girder is again used as a work scaffold, and the upper portion of the side plate for the predetermined height is again cut and removed, and the wind girder is lowered. And dismantling from the upper side to the lower side by repeating the process of cutting and removing the upper part of the side plate.
をもって複数の引掛けサポートを取付け、かつ解体する
貯槽側板に固着されているウィンドガーダーの上面に上
記引掛けサポートと対応させて複数の吊りピースを取付
け、その吊りピースと上記引掛けサポートとの間に吊り
下げ機を取付けてウィンドガーダーを吊り下げ支持し、
その吊り下げ支持状態のウィンドガーダーと上記解体す
る貯槽側板との固着部を切断分離し、その切断分離した
ウィンドガーダーを下降可能な作業足場に利用して、上
記複数の引掛けサポートのうちの一つ又は幾つかを側板
上部から取り外し、その引掛けサポートが取り外された
所の側板部を部分切断撤去する工程と、その側板部が部
分切断撤去された後の側板の上部に、上記取り外してお
いた上記引掛けサポートを掛け変え、その引掛けサポー
トと元の吊りピースとの間に吊り下げ間隔を縮めて元の
吊り下げ機を戻し取付けてウィンドガーダーを元の吊り
下げ支持状態に復旧する工程を施工した後、上記吊り下
げ機を操作して上記吊り下げ支持状態のウィンドガーダ
ーを所定高さ分だけ降下させ、その降下したウィンドガ
ーダーを再び作業足場に利用して、上記工程の繰り返し
で上方から下方に向けて解体することを特徴とする貯槽
の解体工法。2. A plurality of hooking supports are attached to the entire circumference of the upper portion of the side plate of the storage tank to be dismantled, and a plurality of hooking supports are attached to the upper surface of the wind girder fixed to the storage tank side plate for disassembly. A hanging piece is attached, and a suspending machine is attached between the hanging piece and the hanging support to suspend and support the wind girder,
The fixed part of the suspended windshield girder and the tank side plate to be disassembled is cut and separated, and the cut and separated wind girder is used as a work platform which can be lowered, and one of the plurality of hooking supports is used. One or several of them from the upper part of the side plate, and partially cutting and removing the side plate part where the hooking support has been removed; and A process of changing the hanging support that has been used, shortening the hanging interval between the hanging support and the original hanging piece, returning the original hanging machine to the original state, and restoring the wind girder to the original hanging support state. After constructing the above, the above-mentioned hanging girder is operated by operating the above-mentioned suspending machine to lower the wind girder in the suspended and supported state by a predetermined height, and then work the lowered girder again. Using the field, demolishing method reservoir, characterized in that dismantling downward from above by repeating the above steps.
は、下降可能な作業足場として分割することなく全体と
して使用するか、或は複数に分割して各個別に使用する
ことを特徴とする請求項１又は２記載の貯槽の解体工
法。3. The wind girder of the storage tank to be dismantled is used as a whole without being divided as a work platform which can be lowered, or is divided into a plurality and used individually. Or the dismantling method of the storage tank of 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30423096A JP3787709B2 (en) | 1996-10-31 | 1996-10-31 | Tank dismantling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30423096A JP3787709B2 (en) | 1996-10-31 | 1996-10-31 | Tank dismantling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10131520A true JPH10131520A (en) | 1998-05-19 |
| JP3787709B2 JP3787709B2 (en) | 2006-06-21 |
Family
ID=17930577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30423096A Expired - Lifetime JP3787709B2 (en) | 1996-10-31 | 1996-10-31 | Tank dismantling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3787709B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101470517B1 (en) * | 2014-08-01 | 2014-12-12 | 주식회사 경신산기 | Gondola for tower working |
| WO2018201372A1 (en) * | 2017-05-04 | 2018-11-08 | Bestway Inflatables & Material Corp. | Window for an above-ground pool |
| CN115488012A (en) * | 2022-08-04 | 2022-12-20 | 广东方皓金属科技有限公司 | Automatic hook dismounting device of hook powder dip molding machine |
-
1996
- 1996-10-31 JP JP30423096A patent/JP3787709B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101470517B1 (en) * | 2014-08-01 | 2014-12-12 | 주식회사 경신산기 | Gondola for tower working |
| WO2018201372A1 (en) * | 2017-05-04 | 2018-11-08 | Bestway Inflatables & Material Corp. | Window for an above-ground pool |
| US11371278B2 (en) | 2017-05-04 | 2022-06-28 | Bestway Inflatables & Material Corp. | Window for an above-ground pool |
| CN115488012A (en) * | 2022-08-04 | 2022-12-20 | 广东方皓金属科技有限公司 | Automatic hook dismounting device of hook powder dip molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3787709B2 (en) | 2006-06-21 |
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