JPH1061246A - Method of disassembling and repair construction of upper section of cylindrical storage-tank peripheral wall - Google Patents
Method of disassembling and repair construction of upper section of cylindrical storage-tank peripheral wallInfo
- Publication number
- JPH1061246A JPH1061246A JP23864296A JP23864296A JPH1061246A JP H1061246 A JPH1061246 A JP H1061246A JP 23864296 A JP23864296 A JP 23864296A JP 23864296 A JP23864296 A JP 23864296A JP H1061246 A JPH1061246 A JP H1061246A
- Authority
- JP
- Japan
- Prior art keywords
- peripheral wall
- section
- roller
- dismantling
- cut
- 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
- 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、鋼製円筒形の周
壁を有する貯槽、例えば原油等を貯蔵する大型浮屋根式
貯槽等の補修が必要な周壁上部を解体し、その周壁上部
を解体した位置に新規の周壁部材を用いて新規の周壁上
部を組立てて補修する解体補修工法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention disassembles an upper part of a peripheral wall which needs repairing a storage tank having a cylindrical peripheral wall made of steel, for example, a large floating roof type storage tank for storing crude oil and the like, and disassembles the upper part of the peripheral wall. The present invention relates to a dismantling repair method for assembling and repairing a new upper portion of a peripheral wall using a new peripheral wall member at a position.
【0002】[0002]
【従来の技術】鋼製円筒形の周壁を有する貯槽の大型浮
屋根式貯槽は、一部を切り欠いて示した正面説明図の図
4にその概略構造を示したように、円筒形貯槽21の周
壁22の上部には、周壁22が強風等によって変形した
り、座屈したりしないように、補強材として外方に延出
して形成した鍔状のウィンドガーダー23がブラケット
24を用いて溶接によって取付けられている。このウィ
ンドガーダー23が取付けられている周壁22の上部
は、ウィンドガーダー23との接合部に雨水が溜りやす
く、更にウィンドガーダー23の取付溶接時に溶接の熱
を受けているので、腐食が発生しやすい。近年その腐食
が発生した周壁22の上部を解体し、補修する必要性が
増加してきている。2. Description of the Related Art A large floating roof type storage tank having a steel cylindrical peripheral wall has a cylindrical storage tank 21 as shown schematically in FIG. On the upper part of the peripheral wall 22, a flange-shaped wind girder 23 formed by extending outward as a reinforcing material is welded using a bracket 24 so that the peripheral wall 22 is not deformed by strong wind or the like and does not buckle. Installed. At the upper part of the peripheral wall 22 to which the wind girder 23 is attached, rainwater easily accumulates at the joint with the wind girder 23, and furthermore, because of the heat of welding when the wind girder 23 is attached and welded, corrosion tends to occur. . In recent years, the need to disassemble and repair the upper portion of the peripheral wall 22 where the corrosion has occurred has been increasing.
【0003】そして、その腐食が発生した周壁上部の従
来解体補修工法の第1番目工法としては、図示は省略す
るが、まず、その周壁上部に取付けられているウィンド
ガーダーをガス切断等で切断してブロック化し、そのブ
ロック化されたウィンドガーダーはクレーン等の重機で
降下し、運搬して撤去する。次いで、そのウィンドガー
ダーが取付けられていた周壁上部を、上端部から下方の
腐食した補修箇所まで、ガス切断と切断した周壁材の重
機による降下運搬撤去とを順次繰り返して解体し、しか
るのち、解体した周壁上部箇所に、新規の周壁部材をク
レーン等の重機を用いて運び、積上げて新規の周壁上部
を組立てる。その後、組立てとその溶接接合を終えた新
規の周壁上部に新規のウィンドガーダーを取付けて補修
する解体補修工法が一般的に採用されている。[0003] As a first method of the conventional dismantling and repairing method for the upper part of the peripheral wall where the corrosion has occurred, although not shown, first, a wind girder attached to the upper part of the peripheral wall is cut by gas cutting or the like. The wind girder is lowered by heavy equipment such as a crane, transported and removed. Next, the upper part of the peripheral wall to which the wind girder was attached is dismantled by repeating gas cutting and dropping and removal of the cut peripheral wall material by a heavy machine sequentially from the upper end part to the corroded repaired part, and then dismantled. A new peripheral wall member is transported to the upper portion of the peripheral wall using a heavy machine such as a crane, and is stacked to assemble a new upper portion of the peripheral wall. After that, a dismantling repair method is generally adopted in which a new wind girder is attached to and repaired on a new upper part of the peripheral wall after the assembly and the welding and joining thereof are completed.
【0004】また、第2番目の従来工法としては、図示
を省略するが、基礎上に敷設された底板と周壁下端部と
の接合部を切断し、周壁下部の外側面に取付けたブラケ
ットに、基礎上に載置したジャッキの頭部を当接して前
記底板との接合部を切断した周壁を持ち上げ、そのジャ
ッキで持ち上げた状態で周壁の下部を切断撤去する工程
と、その下部を切断撤去された周壁をジャッキで降下
し、その降下した周壁に前記ブラケットを付替えて前記
ジャッキを掛けかえる工程を交互に繰り返して下方から
上方に向けて補修箇所まで周壁を切断撤去して解体し、
しかるのち、その解体した周壁箇所は、解体と逆の手順
で、前記ジャッキで持ち上げられている周壁の下部に新
規の周壁部材を組込んで接合する工程と、その持ち上げ
られている周壁の前記ブラケットを付替えて前記ジャッ
キを掛けかえ、新規の周壁部材を組込んだ周壁を持ち上
げる工程を順次繰り返して新規の周壁を組立てた後、ジ
ャッキで持ち上げていた周壁を降下させて底板と接合し
て補修する工法によって、腐食していた周壁を地上付近
でジャッキを用いて解体補修する周知工法がある。[0004] As a second conventional method, although not shown, a joint between a bottom plate laid on a foundation and a lower end of a peripheral wall is cut, and a bracket attached to an outer surface of a lower portion of the peripheral wall is cut off. A step of lifting the peripheral wall that cuts the joint with the bottom plate by contacting the head of the jack placed on the foundation, cutting and removing the lower part of the peripheral wall while lifting with the jack, and cutting and removing the lower part. Lowering the peripheral wall with a jack, replacing the bracket on the dropped peripheral wall and replacing the jack alternately repeats the process, cutting and removing the peripheral wall from below to the repair point upward and disassembling,
Thereafter, the disassembled peripheral wall portion is assembled in a reverse procedure to the disassembly by incorporating a new peripheral wall member into a lower portion of the peripheral wall being lifted by the jack, and joining the bracket to the bracket. After replacing the jack, the process of lifting the peripheral wall incorporating the new peripheral wall member is sequentially repeated to assemble a new peripheral wall, and then the peripheral wall lifted by the jack is lowered and joined to the bottom plate for repair. There is a well-known method of dismantling and repairing a corroded peripheral wall using a jack near the ground.
【0005】また、第3番目の従来工法として、同じく
図示を省略するが、地上付近の壁厚さが厚い周壁を水平
に対して一定の傾斜を有する切断線の螺線状に周切断し
て上下段の周壁部に分離し、その下段周壁部の上端縁に
ローラーを設置し、そのローラーの上に回転自在に上段
周壁部を載置し、その載置した上段周壁部を下方から上
方に向けて、その上段周壁部の下部を部分切断撤去する
工程と、前記ローラーの上で回転させて上段周壁部を降
下させる工程とを順次繰り返して補修箇所まで上段周壁
部を解体し、しかるのち、解体と逆手順で、上段周壁部
の下部に新規の周壁部材を組込んで接合する工程とロー
ラーの上で回転させて上段周壁部をせり上げる工程とを
交互に繰り返して上段周壁部を組立てる工法によって、
腐食していた周壁を地上付近の一定場所でローラーを用
いて解体補修する発明(特公平3−45187号公報参
照)が知られている。As a third conventional method, a peripheral wall having a large wall thickness near the ground is circumferentially cut in a spiral shape along a cutting line having a constant inclination with respect to the horizontal, though not shown in the figure. Separated into upper and lower peripheral walls, a roller is installed on the upper edge of the lower peripheral wall, the upper peripheral wall is rotatably placed on the roller, and the placed upper peripheral wall is placed from below to above. Toward, the step of partially cutting and removing the lower part of the upper peripheral wall part, and the step of lowering the upper peripheral wall part by rotating on the roller are sequentially repeated to disassemble the upper peripheral wall part to the repair point, and thereafter, A method of assembling the upper peripheral wall by alternately repeating the steps of assembling and joining a new peripheral wall member to the lower part of the upper peripheral wall in the reverse procedure of disassembly, and rotating the upper peripheral wall by rotating on rollers. By
There is known an invention in which a corroded peripheral wall is dismantled and repaired using a roller at a fixed location near the ground (see Japanese Patent Publication No. 3-45187).
【0006】[0006]
【発明が解決しようとする課題】しかしながら、上述の
ような従来解体補修工法においては、第1番目の従来工
法では、解体補修する貯槽の全周に亙って周壁を切断撤
去して解体する作業と新規周壁部材を運んできて組立て
る作業とを施工しなければならないので、貯槽と接続す
る配管を撤去してクレーン等の重機移動が可能な空地を
解体補修する貯槽の周囲に確保する必要性があり、更
に、切断した解体片や新規周壁部材の貯槽外周移動、或
は工事作業に必要な治具や道具の貯槽外周移動を行う繁
雑さ等から作業の安全性及び能率性の低下を余儀なくさ
れた。また、ウィンドガーダーが取り外された状態で高
所の周壁上部を解体補修するため、工事期間中に強風が
おそってきたときには、周壁を倒壊させる恐れ等の心配
があった。However, in the conventional dismantling and repairing method described above, the first conventional method involves cutting and removing the peripheral wall over the entire circumference of the storage tank to be dismantled and repairing. And the work of assembling the new surrounding wall member and carrying out the assembly work.Therefore, it is necessary to remove the piping connected to the storage tank and secure the open space where heavy equipment such as cranes can be moved around the storage tank for dismantling and repairing. In addition, the safety and efficiency of work must be reduced due to the complexity of moving the outer periphery of the storage tank of the cut dismantled pieces and new surrounding wall members, or the outer periphery of the storage tank of jigs and tools required for construction work. Was. In addition, since the upper part of the surrounding wall was dismantled and repaired with the wind girder removed, there was a concern that the surrounding wall could collapse if strong winds were applied during the construction period.
【0007】また、第2番目のジャッキを用いた従来の
解体補修工法は、強風を受け難い低所で工事が施工でき
る利点は有するものの、周壁の上部を解体補修するため
に、周壁の下部を解体補修しなければならない余分な工
事が生じ、かつ、その解体補修の作業は、上記第一番目
の従来解体補修工法と同様に、解体補修する貯槽の全周
に亙って作業を行わなければならないため、その貯槽の
周囲にクレーン等の重機移動が可能な空地を確保しなけ
ればならない等の上記第一番目の従来解体補修工法が保
有する問題を内在していた。The conventional dismantling and repairing method using the second jack has an advantage that the construction can be carried out in a low place where it is hard to receive strong wind, but in order to disassemble and repair the upper part of the surrounding wall, the lower part of the surrounding wall is required. Extra work that must be dismantled and repaired occurs, and the work for the dismantled repair must be performed over the entire circumference of the storage tank to be dismantled and repaired, as in the first conventional dismantled repair method. Therefore, there is a problem inherent in the first conventional dismantling and repairing method, such as the necessity of securing an open space around the storage tank where a heavy machine such as a crane can be moved.
【0008】第3番目のローラーを用いた従来の解体補
修工法は、強風を受け難い低所の一定場所で施工でき、
かつ、クレーン等の重機が移動可能な空地を解体補修す
る貯槽の周囲に確保する必要もなく、更に、解体作業や
組立て作業等に必要な治具や道具等を移動する繁雑さが
ない等の利点は有するものの、第2番目のジャッキを用
いた従来解体補修工法が有する低所での施工が生じさせ
る問題、つまり補修が必要な周壁の上部を解体補修する
ために周壁の下部をも解体補修しなければならない問題
を有していた。[0008] The conventional dismantling and repairing method using the third roller can be carried out in a fixed place in a low place where it is hard to receive strong winds.
In addition, there is no need to secure an open space where a heavy machine such as a crane can move around the storage tank for dismantling and repairing, and there is no need to move jigs and tools necessary for dismantling and assembly work. Despite having the advantage, the problem that the conventional demolition repair method using the second jack causes construction in low places, that is, the lower part of the peripheral wall is also demolished to repair the upper part of the peripheral wall that needs repair Had problems to do.
【0009】この発明は、上述のような問題点に鑑みて
なされたもので、解体補修する貯槽の周囲にクレーン等
の重機周回可能な空地を確保する必要がなく、かつ解体
作業や組立て作業等に必要な治具や道具等を移動する必
要もなく、更に解体補修を必要とする貯槽の周壁上部の
みを安全に効率良く一定場所で解体補修できるようにし
た円筒形貯槽周壁上部の解体補修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, and there is no need to secure an open space around a storage tank to be dismantled and repaired, such as a crane, capable of revolving around heavy equipment. Dismantling and repairing method for the upper part of the cylindrical storage tank peripheral wall, which eliminates the need to move jigs and tools necessary for dismantling, and enables only the upper part of the peripheral wall of the storage tank that requires dismantling and repair to be safely and efficiently dismantled and repaired at a certain place Is provided.
【0010】[0010]
【課題を解決するための手段】この発明に係る円筒形貯
槽周壁上部の解体補修工法は、円筒形貯槽周壁上部の解
体補修箇所下部周壁面に周環状の補強リングを水平に取
付け、その補強リングを取付けた周壁の上部を水平に周
切断して上段及び下段の周壁部に分離し、その分離した
下段周壁部の上端縁に、前記分離した上段周壁部を回転
自在に支持するローラーを所定間隔で配設し、その配設
したローラーの上に回転自在に支持した前記上段周壁部
の上端部を部分切断して撤去する工程と、その部分切断
撤去された上段周壁部を前記ローラーの上で回転移動す
る工程とを順次繰り返して一定場所で補修が必要な上段
周壁部の全てを切断撤去することによって解体し、しか
るのち、その上段周壁部を解体したローラーの上に上段
周壁部を一定場所で組立てて補修することによって施工
するもので、効率良く短期間かつ安全に施工するもので
ある。According to the present invention, there is provided a method for disassembling and repairing an upper portion of a cylindrical storage tank peripheral wall, wherein a circumferential annular reinforcing ring is horizontally mounted on a lower peripheral wall surface of a dismantling and repairing portion above the cylindrical storage tank peripheral wall. The upper part of the peripheral wall to which is attached is horizontally cut and separated into upper and lower peripheral walls, and a roller for rotatably supporting the separated upper peripheral wall is provided at an upper edge of the separated lower peripheral wall at a predetermined interval. The step of partially cutting and removing the upper end portion of the upper peripheral wall portion rotatably supported on the disposed roller, and removing the partially cut and removed upper peripheral wall portion on the roller. The process of rotating and moving is sequentially repeated to dismantle by cutting and removing all of the upper peripheral wall that needs to be repaired at a certain place, and then place the upper peripheral wall on a roller on which the upper peripheral wall has been dismantled. Intended to construction by assembled repaired, it is to efficiently short time and safely construction.
【0011】また、上記ローラーの上に回転自在に支持
した上記上段周壁部の下部側面に、上記下段周壁部の上
部側面に係合するサイドローラーを設置して施工するも
ので、工事期間中に強風がおそってきたとしても、ロー
ラー上の上段周壁部を脱落させる心配なく、より安全に
工事を施工できるようにした円筒形貯槽周壁上部の解体
補修工法である。In addition, a side roller is provided on a lower side surface of the upper peripheral wall portion rotatably supported on the roller and is engaged with an upper side surface of the lower peripheral wall portion. This is a method of dismantling and repairing the upper part of the cylindrical storage tank peripheral wall so that the construction can be performed more safely without worrying that the upper peripheral wall on the roller will fall off even if strong winds are applied.
【0012】[0012]
【発明の実施の形態】この発明の実施形態の一例とし
て、大型浮屋根式円筒形貯槽の周壁上部を解体し、補修
する工事例を、図1及至図3に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an example of an embodiment of the present invention, an example of disassembling and repairing an upper peripheral wall of a large-sized floating roof type cylindrical storage tank will be described with reference to FIGS.
【0013】まず、鋼製円筒形の周壁2を有する大型浮
屋根式の円筒形貯槽1の補修が必要な周壁2の上部、つ
まり、ブラケット4を用いてウインドガーダー3が取付
けられている上部周壁2の下部周壁内外面全周に亙って
作業足場5を取付け、その作業足場5を利用して、周壁
2の解体補修箇所下部の周壁面に、周環状の補強リング
6を水平に取付ける。First, a large floating roof type cylindrical storage tank 1 having a steel cylindrical peripheral wall 2 needs to be repaired. The upper part of the peripheral wall 2 that needs to be repaired, that is, the upper peripheral wall to which the wind girder 3 is attached using the bracket 4. A work scaffold 5 is attached over the entire inner and outer surfaces of the lower peripheral wall 2, and a circumferential annular reinforcing ring 6 is horizontally mounted on the peripheral wall of the peripheral wall 2 below the disassembly and repair location using the work scaffold 5.
【0014】そして、その補強リング6を取付けた上部
の周壁2を水平帯状にガス切断等で切り欠き、その水平
帯状に切り欠いた上部の周壁2、つまり、上段周壁部2
Uを回転自在に支持する複数のローラー9を、前記水平
帯状に切り欠いた下部の周壁2、つまり下段周壁部2B
の上端縁に、所定間隔で全周に亙って配設する。The upper peripheral wall 2 to which the reinforcing ring 6 is attached is cut out in a horizontal band by gas cutting or the like, and the upper peripheral wall 2 cut in the horizontal band, that is, the upper peripheral wall 2 is cut.
A plurality of rollers 9 that rotatably support U are provided with the lower peripheral wall 2 cut out in the horizontal band shape, that is, the lower peripheral wall 2B.
Are arranged over the entire periphery at predetermined intervals on the upper edge of the.
【0015】補強リング6は、工事期間中に強風が襲っ
てきたとしても、ウインドガーダー3を取り外して解体
補修中の周壁2が変形したり、座屈したりしない剛性を
与え、かつ壁厚さの薄い上部周壁2を切断して分離した
下段周壁部2Bの開口した上端縁が上段周壁部2Uを確
りと支持し得る剛性を与えるように溝形鋼やH形鋼など
の形鋼等で形成し、図2及び図3に示した周壁2の内
面、又は外面或は内外の両面に、図3に示したように周
壁2に一端部を溶着したL字状の板治具7とテーパーピ
ンの角矢治具8を用いた取付けや溶接による溶着取付け
等で、周壁2に水平、かつ周環状に取付けて設ける。な
お、既設ウィンドガーダー3をブロック状に切断したの
ち、補強リング6、或は周壁2の外面作業足場5を兼用
した補強リング6に転用すれば、経済的な解体補修工事
が可能となる。The reinforcing ring 6 is provided with rigidity so that the wind girder 3 is removed to prevent the peripheral wall 2 from being deformed or buckled during disassembly and repair, even if a strong wind blows during the construction period. The upper peripheral wall 2B formed by cutting the thin upper peripheral wall 2 is formed of a section steel such as a channel steel or an H-shaped steel so that the opened upper end edge of the lower peripheral wall 2B has rigidity capable of securely supporting the upper peripheral wall 2U. An L-shaped plate jig 7 having one end welded to the peripheral wall 2 as shown in FIG. 3 and an inner surface of the peripheral wall 2 shown in FIG. 2 and FIG. It is mounted horizontally and circumferentially on the peripheral wall 2 by mounting using a square arrow jig 8 or welding by welding. In addition, if the existing wind girder 3 is cut into a block shape and then converted to the reinforcing ring 6 or the reinforcing ring 6 which also serves as the outer working scaffold 5 of the peripheral wall 2, economical demolition and repair work becomes possible.
【0016】上述のように補強リング6を取付けた周壁
2の上部を水平帯状に切り欠き、周切断して上段及び下
段の周壁部2U、2Bに分離し、その分離した上段周壁
部2Uが下段周壁部2Bの上端縁に配設したローラー
9、9、・・・の上で回転自在に支持されるように形成
する。このように形成しておいて、図1に示すように、
ローラー9、9、・・・の上に回転自在に支持した上段
周壁部2U及びその上段周壁部2Uに取付けられている
ウィンドガーダー3の上端部をガス切断等で部分切断
し、その部分切断したブロック状の解体片はクレーン等
の重機10を用いて降下し撤去する。そして、重機10
を据え置いた近傍位置の上段周壁部2Uの上端部とその
上段周壁部2U上端部に取付けられているウィンドガー
ダー3の切断撤去が終えた上段周壁部2Uはローラー
9、9、・・・によって図1の矢印左回り方向に回転さ
せて移動する。なお、上段周壁部2Uの回転移動方向
は、解体が完了するまで一定の方向であれば、図示と逆
の右回り方向であってもよい。As described above, the upper portion of the peripheral wall 2 to which the reinforcing ring 6 is attached is cut out in a horizontal band shape, and is cut to separate the upper and lower peripheral wall portions 2U and 2B, and the separated upper peripheral wall portion 2U is connected to the lower stage. It is formed so that it may be rotatably supported on rollers 9, 9,... Disposed on the upper edge of the peripheral wall 2B. After being formed in this way, as shown in FIG.
The upper peripheral wall 2U rotatably supported on the rollers 9, 9,... And the upper end of the wind girder 3 attached to the upper peripheral wall 2U were partially cut by gas cutting or the like, and were partially cut. The block-shaped demolition pieces are lowered and removed by using a heavy machine 10 such as a crane. And heavy equipment 10
The upper peripheral wall 2U, which has been cut and removed from the upper end of the upper peripheral wall 2U and the wind girder 3 attached to the upper end of the upper peripheral wall 2U, is positioned by rollers 9, 9,. Move by rotating counterclockwise arrow 1. Note that the rotational movement direction of the upper peripheral wall portion 2U may be a clockwise direction opposite to the illustrated direction as long as the rotation direction is constant until the disassembly is completed.
【0017】次いで、据え置いた重機10の近傍位置に
回転移動されてきた上段周壁部2U及びその上段周壁部
2Uに取付けられているウィンドガーダー3の上端部を
再びガス切断等で部分切断し、その部分切断したブロッ
ク状の解体片はクレーン等の重機10を用いて再び降下
し撤去する。このように、ローラー9、9、・・・の上
に回転自在に支持した上段周壁部2Uの上端部を、その
上段周壁部2U上端部に取り付けられているウィンドガ
ーダー3を含めて部分切断し撤去する工程と、その部分
切断撤去された上段周壁部2Uをローラー9、9、・・
・の上で一定方向に回転移動する工程とを順次繰り返し
て重機10を据え置いた一定場所で補修が必要な上段周
壁部2Uの全てを上部から下部に向かって順次切断撤去
することによって解体する。Next, the upper peripheral wall 2U which has been rotated and moved to a position near the stationary heavy equipment 10 and the upper end of the wind girder 3 attached to the upper peripheral wall 2U are partially cut again by gas cutting or the like. The partially cut block-shaped disassembled piece is lowered again using heavy equipment 10 such as a crane and removed. In this way, the upper end of the upper peripheral wall 2U rotatably supported on the rollers 9, 9, ... is partially cut including the wind girder 3 attached to the upper end of the upper peripheral wall 2U. The removal step and the upper peripheral wall portion 2U, which has been partially cut and removed, are provided with rollers 9, 9,.
The steps of rotating and moving in a certain direction on the top are sequentially repeated, and the entire upper peripheral wall portion 2U requiring repair is dismantled by sequentially cutting and removing from the upper part to the lower part in a fixed place where the heavy equipment 10 is installed.
【0018】しかして補修が必要な上段周壁部2Uの全
ての解体が重機10を据え置いた一定場所で終了したの
ち、その上段周壁部2Uを解体したローラー9、9、・
・・の上に重機10を用いて新規の周壁部材を積上げて
組立てる。かくして、重機10を据え置いた近傍位置の
上段周壁部2Uの一段円周一部を構成する上段周壁部2
Uの組立てが終了すると、その組立が終えた上段周壁部
2Uはローラー9、9、・・・を用いて一定方向の円周
方向に回転移動する。そしてその回転移動したあとに、
再び重機10を用いて新規の周壁部材を積上げて組立て
る。After all dismantling of the upper peripheral wall portion 2U requiring repair is completed at a fixed place where the heavy equipment 10 is set, the rollers 9, 9,.
A new peripheral wall member is stacked on top of the heavy machine 10 and assembled. Thus, the upper peripheral wall 2 which forms a part of the upper peripheral wall 2U near the position where the heavy equipment 10 is settled
When the assembling of U is completed, the upper peripheral wall 2U after the assembling is rotated in a certain circumferential direction by using the rollers 9, 9,. And after that rotation,
The new peripheral wall member is stacked and assembled again using the heavy equipment 10.
【0019】このように、上段周壁部2Uを解体したロ
ーラー9、9、・・・の上に新規の周壁部材を積上げて
組立てる工程と、その周壁部材を積み上げて組み立てた
上段周壁部2Uをローラー9、9、・・・の上で回転移
動する工程とを交互に繰り返して上段周壁部2Uの全て
を重機10を据え置いた一定場所で組立てる。In this manner, the step of stacking and assembling a new peripheral wall member on the rollers 9, 9,... Dismantling the upper peripheral wall section 2U, and the step of stacking and assembling the upper peripheral wall section 2U by assembling the peripheral wall member. , 9,... Are alternately repeated to assemble the entire upper peripheral wall 2 </ b> U at a fixed place where the heavy equipment 10 is installed.
【0020】組立てが終えて円周方向に回転移動させた
上段周壁部2Uは、順次引き続いて移動された組立て場
所と異なる一定場所で溶接接合し、かつその溶接接合部
も移動された溶接場所と異なる他の一定場所で順次連続
して検査する。The upper peripheral wall 2U, which has been rotated in the circumferential direction after assembly, is welded and joined at a certain place different from the assembly place to which the assembly has been successively moved, and the welded joint is also connected to the moved welding place. Inspection is performed sequentially and continuously at different fixed locations.
【0021】上記のように組立て、接合して検査した上
段周壁部2Uに取付けられるウィンドガーダー3は、上
述の上段周壁部2Uの組立方法と同様な方法、つまり上
段周壁部2Uに新規のウィンドガーダー部材を新規のブ
ラケット材を用いて取付ける工程と、その新規のウィン
ドガーダー部材を取付けた上段周壁部2Uをローラー
9、9、・・・の上で回転移動する工程とを交互に繰り
返して上段周壁部2Uに取付けられる全てのウィンドガ
ーダー3を、重機10を据え置いた一定場所で取付け
る。なお、上段周壁部2Uへの新規ウィンドガーダー3
の取付方法は、上記方法に限らず、例えば上段周壁部2
Uを組立てる際に、地上で新規の周壁部材に、新規のブ
ラケット材を用いて新規のウィンドガーダー部材を取付
けておいて、そのウィンドガーダー部材を取付けた新規
周壁部材を組立てる方法、つまり、効率の良い地上での
溶接作業を増加し、かつウィンドガーダー部材を取付け
ることによって剛性を高めた新規周壁部材を容易に積上
げて組立てる方法等を用いてウィンドガーダー3の取付
けを施工してもよい。The wind girder 3 attached to the upper peripheral wall 2U assembled and joined and inspected as described above is provided in the same manner as the above-described method of assembling the upper peripheral wall 2U, that is, a new wind girder is attached to the upper peripheral wall 2U. The step of attaching the member using the new bracket member and the step of rotating and moving the upper peripheral wall portion 2U on which the new wind girder member is attached on the rollers 9, 9,. All the wind girder 3 attached to the part 2U is attached at a fixed place where the heavy equipment 10 is set. In addition, new wind girder 3 to upper section peripheral wall 2U
Is not limited to the above-described method. For example, the upper peripheral wall 2
At the time of assembling the U, a new wind girder member is attached to a new peripheral wall member using a new bracket material on the ground, and a method of assembling a new peripheral wall member to which the wind girder member is attached, that is, a method of improving efficiency. The wind girder 3 may be mounted using a method of easily stacking and assembling new peripheral wall members having increased rigidity by increasing the number of good ground welding operations and mounting the wind girder members.
【0022】かくして、新規のウィンドガーダー3が取
付けられた上段周壁部2Uは、図3に示したように、上
段周壁部2Uの内壁面に形鋼等で形成して取付けたブラ
ケット11に頭部を当接し、下段周壁部2Bの内壁面に
取付けられている補強リング6の上に据え置いたジャッ
キ12、12、・・・によって支持した後、ローラー
9、9、・・・を取り外し、上段周壁部2U及び下段周
壁部2Bの外壁面に取付けたコの字板状の治具13、1
3に溝形鋼等で形成して挿入したガイド14によって降
下の案内をさせて下段周壁部2Bの上端部まで上段周壁
部2Uを降下し、その上段周壁部2Uの下端部と下段周
壁部2Bの上端部を溶接接合し、その溶接接合部の検査
を施工し、補修を完了させる。Thus, as shown in FIG. 3, the upper peripheral wall portion 2U to which the new wind girder 3 is attached is mounted on the bracket 11 formed on the inner wall surface of the upper peripheral wall portion 2U with a shape steel or the like. Are supported by jacks 12, 12,... Fixed on a reinforcing ring 6 attached to the inner wall surface of the lower peripheral wall portion 2B, and then the rollers 9, 9,. U-shaped jigs 13 and 1 attached to the outer wall surfaces of the portion 2U and the lower peripheral wall portion 2B.
3, the upper peripheral wall 2U is lowered to the upper end of the lower peripheral wall 2B by a guide 14 formed of a channel steel or the like and inserted, and the lower end of the upper peripheral wall 2U and the lower peripheral wall 2B are lowered. The upper end is welded, the welded joint is inspected, and the repair is completed.
【0023】なお、上段周壁部2U及び下段周壁部2B
の外壁面に取付けたコの字板状の治具13、13に挿入
したガイド14は、上段周壁部2Uが水平度を保って降
下し得るように隔接間隔をもって全周に亙って配設す
る。また、図3の実施形態例においては、ジャッキ12
を補強リング6の上に据え置いて、工事施工の能率を高
め、経済的に施工しているが、上段周壁部2Uに設置し
たようなブラケット11を下段周壁部2Bに設置し、そ
のブラケット11の上にジャッキ12を据え置いて施工
してもよい。The upper peripheral wall 2U and the lower peripheral wall 2B
The guides 14 inserted in the U-shaped plate-like jigs 13 attached to the outer wall surfaces of the U-shape are distributed over the entire circumference with a space between them so that the upper peripheral wall portion 2U can descend while maintaining the horizontal level. Set up. Further, in the embodiment of FIG.
Is installed on the reinforcing ring 6 to improve the efficiency of construction and economical construction. However, a bracket 11 installed on the upper peripheral wall 2U is installed on the lower peripheral wall 2B, and the bracket 11 The jack 12 may be installed on the upper surface.
【0024】また、下段周壁部2Bの上端縁に配設した
ローラー9、9、・・・の上で上段周壁部2Uを解体す
る際、及び上段周壁部2Uを解体したローラー9、9、
・・・の上で新規の周壁部材を積上げて新規の上段周壁
部2Uを組立てる際には、図2に示したように、上段周
壁部2Uの下部両側面に、下段周壁部2Bの上部両側面
に係合するサイドローラー15を設置して施工する。こ
のサイドローラー15は、図2に示したように、形鋼等
でコの字状の形状に形成した上方端部を上段周壁部2U
の下部側面に溶接接合し、車輪16を取付けた下方端部
が下段周壁部2Bの上部側面に隔接間隙をもって対向す
る如く形成する。When the upper peripheral wall 2U is disassembled on the rollers 9, 9,... Disposed on the upper end edge of the lower peripheral wall 2B, the rollers 9, 9, which dismantle the upper peripheral wall 2U,
When assembling a new upper peripheral wall portion 2U by stacking a new peripheral wall member on the upper side, as shown in FIG. 2, both upper portions of the lower peripheral wall portion 2B are provided on both lower side surfaces of the upper peripheral wall portion 2U. The side roller 15 which engages with the surface is installed and constructed. As shown in FIG. 2, the side roller 15 has an upper end formed in a U-shape with a shaped steel or the like and an upper peripheral wall 2 </ b> U.
And the lower end to which the wheel 16 is attached is formed so as to face the upper side of the lower peripheral wall portion 2B with a clearance gap.
【0025】このように形成したサイドローラー15
を、周壁2の内外両側面に対向させ、かつ隔接間隔をも
って全周に亙って設置し、工事期間中に強風が襲ってき
たとしても解体補修中の上段周壁部2Uがローラー9、
9、・・・の上から水平移動して脱落せず、かつ上段周
壁部2Uの解体補修工事に支障を生じさせないように上
段周壁部2Uがローラー9、9、・・・の上で回転自在
な状態のまま、分離した上下段の周壁部2U、2Bを連
結するように設置し、前述の解体補修工事をより安全に
施工する。尚、上記図2の形態例においては、サイドロ
ーラー15を周壁2の内外両側面に対向させて全周に亙
って配置しているが、隔接間隔をもって一方側の内側全
周のみ又は外側全周のみに配置し、経済的に配設しても
よい。The thus formed side roller 15
Are installed along the entire circumference at opposite intervals on the inner and outer side surfaces of the peripheral wall 2, and even if a strong wind blows during the construction period, the upper peripheral wall portion 2 </ b> U during the dismantling and repairing is provided with the rollers 9.
The upper peripheral wall 2U is rotatable on the rollers 9, 9,... So that the upper peripheral wall 2U does not fall off due to horizontal movement from above the top 9 and does not hinder the disassembly and repair work of the upper peripheral wall 2U. In such a state, the separated upper and lower peripheral wall portions 2U and 2B are installed so as to be connected to each other, and the disassembly repair work described above is performed more safely. In the embodiment shown in FIG. 2, the side rollers 15 are arranged over the entire circumference so as to oppose the inner and outer side surfaces of the peripheral wall 2. However, only the inner circumference on one side or the outer circumference is spaced apart. It may be arranged only on the entire circumference and arranged economically.
【0026】また、上述の発明の実施形態例は、大型浮
屋根式円筒形貯槽の工事例を紹介したが、この発明に係
る工法は、円筒形の周壁を有する鋼構造物や貯槽、例え
ば浮屋根を有しないオープントップタンクなどの周壁上
部を解体補修する工事にも適用することができる工法で
ある。In the embodiment of the present invention described above, an example of construction of a large-sized floating roof type cylindrical storage tank was introduced. However, the construction method according to the present invention employs a steel structure or a storage tank having a cylindrical peripheral wall, for example, a floating tank. This construction method can be applied to the work of dismantling and repairing the upper part of the peripheral wall such as an open top tank without a roof.
【0027】[0027]
【発明の効果】叙述のように、この発明に係る円筒形貯
槽周壁上部の解体補修工法は、補強リングを解体補修箇
所下部の周壁面に取付けて施工するので、補強リングの
上部周壁を切断分離した下段周壁部の壁厚さの薄い開口
上端縁が補強されて、解体補修する上段周壁部をローラ
ーを介して確りと下段周壁部が支持することができると
ともに、ウィンドガーダーを取り外して施工している工
事期間中に強風がおそってきたとしても、解体補修中の
周壁を倒壊させるおそれの心配なく安全に施工すること
ができる。また、水平切断線で上下段に分離した下段周
壁部の上端縁に配設したローラーの上で、補修が必要な
上段周壁部を部分切断撤去と回転移動とを順次繰り返し
て重機を据え置いた一定場所で解体し、かつ新規周壁部
材の積上げ組立てとその組立てた周壁の回転移動とを交
互に繰り返して重機を据え置いた一定場所で新規上段周
壁部の全てを組立てて補修するため、補修が必要な上段
周壁部のみを効率良く短期間かつ安全に解体補修するこ
とができる。As described above, in the dismantling and repairing method for the upper part of the peripheral wall of the cylindrical storage tank according to the present invention, the reinforcing ring is attached to the peripheral wall of the lower part of the dismantling and repairing part, so that the upper peripheral wall of the reinforcing ring is cut and separated. The upper edge of the lower opening is thinned and the upper edge of the opening is reinforced, so that the upper peripheral wall to be disassembled and repaired can be securely supported by the lower peripheral wall via rollers, and the wind girder is removed for construction. Even if strong winds strike during the construction period, the construction can be done safely without worrying that the surrounding wall during demolition and repair may collapse. In addition, on a roller arranged on the upper edge of the lower peripheral wall part which is separated into upper and lower parts by a horizontal cutting line, the upper peripheral wall part which needs repair is fixed and the heavy equipment is set up by repeating partial cutting removal and rotating movement sequentially. Repair is necessary because the dismantling is performed at the place, and the stacking and assembly of the new peripheral wall member and the rotational movement of the assembled peripheral wall are alternately repeated to assemble and repair all of the new upper peripheral wall portion at the fixed place where the heavy equipment is installed. Only the upper peripheral wall can be dismantled and repaired efficiently and for a short period of time.
【0028】また、ローラーの上に回転自在に支持した
上段周壁部の下部側面に、下段周壁部の上部側面に係合
するサイドローラーを設置して施工する円筒形貯槽周壁
上部の解体補修工法は、サイドローラーによって、上段
周壁部が回転自在な状態で分離したまま、上下段の周壁
部を連結するので、解体補修の工事期間中に強風がおそ
ってきたとしても、上段周壁部が水平移動して脱落する
心配はなく、より安全に効率良く解体補修の工事を施工
することができる。A method of dismantling and repairing the upper part of the cylindrical storage tank peripheral wall, which is constructed by installing a side roller engaging with the upper side surface of the lower peripheral wall part on the lower side surface of the upper peripheral wall part rotatably supported on the roller, is constructed. The upper peripheral wall is connected to the upper and lower peripheral walls by a side roller while the upper peripheral wall is rotatably separated, so that even if a strong wind is applied during the dismantling and repair work, the upper peripheral wall moves horizontally. There is no fear of falling off, and the demolition and repair work can be performed more safely and efficiently.
【0029】[0029]
【図1】 この発明に係る円筒形貯槽周壁上部の解体補
修工法の一例を示し、ローラーの上に回転自在に支持し
た上段周壁部の状況を一部省略し、一部簡略誇張して示
す正面概要説明図である。FIG. 1 shows an example of a method of disassembling and repairing an upper part of a cylindrical storage tank peripheral wall according to the present invention, in which a part of an upper peripheral wall part rotatably supported on a roller is partially omitted, and a partially exaggerated front view is shown. FIG.
【図2】 サイドローラーの設置例を一部省略し、一部
簡略誇張して示す部分概要斜視説明図である。FIG. 2 is a partially schematic perspective explanatory view showing an example in which side rollers are partially omitted and partially exaggerated.
【図3】 ローラー撤去の状況を一部省略し、一部簡略
誇張して示す部分断面説明図である。FIG. 3 is a partial cross-sectional explanatory view showing a roller removal state partially omitted and partially exaggerated.
【図4】 大型浮屋根式貯槽の概略構造例を一部切り欠
いて示した正面説明図である。FIG. 4 is a front explanatory view showing a schematic structure example of a large floating roof type storage tank with a part cut away.
1,21 円筒形貯槽 2,22 周壁 2B 下段周壁部 2U 上段周壁
部 3,23 ウィンドガーダー 4,24 ウィンドガーダーのブラケット 5 作業足場 6 補強リング 7 L字状の板治具 8 角矢治具 9 ローラー 10 重機 11 ジャッキのブラケット 12 ジャッキ 13 コの字状板の治具 14 ガイド 15 サイドローラー 16 サイドロ
ーラーの車輪1, 21 cylindrical storage tank 2, 22 peripheral wall 2B lower peripheral wall 2U upper peripheral wall 3, 23 wind girder 4, 24 wind girder bracket 5 work scaffold 6 reinforcing ring 7 L-shaped plate jig 8 square arrow jig 9 roller Reference Signs List 10 heavy equipment 11 jack bracket 12 jack 13 U-shaped plate jig 14 guide 15 side roller 16 side roller wheel
Claims (2)
周壁面に周環状の補強リングを水平に取付け、その補強
リングを取付けた周壁の上部を水平に周切断して上段及
び下段の周壁部に分離し、その分離した下段周壁部の上
端縁に、前記分離した上段周壁部を回転自在に支持する
ローラーを所定間隔で配設し、その配設したローラーの
上に回転自在に支持した前記上段周壁部の上端部を部分
切断して撤去する工程と、その部分切断撤去された上段
周壁部を前記ローラーの上で回転移動する工程とを順次
繰り返して一定場所で補修が必要な上段周壁部の全てを
切断撤去することによって解体し、しかるのち、その上
段周壁部を解体したローラーの上に上段周壁部を一定場
所で組立てて補修することを特徴とする円筒形貯槽周壁
上部の解体補修工法。1. A circumferential annular reinforcing ring is horizontally mounted on a lower peripheral wall of a dismantling and repairing portion above a cylindrical storage tank peripheral wall, and the upper portion of the peripheral wall to which the reinforcing ring is mounted is horizontally horizontally cut to form upper and lower peripheral wall portions. In the upper edge of the separated lower peripheral wall portion, a roller that rotatably supports the separated upper peripheral wall portion is disposed at a predetermined interval, and is rotatably supported on the disposed roller. A step of partially cutting and removing the upper end of the upper peripheral wall part and a step of rotating and moving the partially cut and removed upper peripheral wall part on the roller in order to repeatedly repair the upper peripheral part at a certain place Dismantling by cutting and removing all of the above, followed by assembling and repairing the upper peripheral wall in a fixed place on the roller that disassembled the upper peripheral wall, and dismantling and repairing the upper part of the cylindrical storage tank peripheral wall .
上記上段周壁部の下部側面に、上記下段周壁部の上部側
面に係合するサイドローラーを設置して施工することを
特徴とする請求項1記載の円筒形貯槽周壁上部の解体補
修工法。2. The method according to claim 1, wherein a side roller engaging with an upper side surface of the lower peripheral wall portion is installed on a lower side surface of the upper peripheral wall portion rotatably supported on the roller. 1. The method of dismantling and repairing the upper part of the peripheral wall of the cylindrical storage tank according to 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23864296A JP3747420B2 (en) | 1996-08-22 | 1996-08-22 | Dismantling repair method for the upper part of cylindrical wall |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23864296A JP3747420B2 (en) | 1996-08-22 | 1996-08-22 | Dismantling repair method for the upper part of cylindrical wall |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1061246A true JPH1061246A (en) | 1998-03-03 |
JP3747420B2 JP3747420B2 (en) | 2006-02-22 |
Family
ID=17033178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23864296A Expired - Fee Related JP3747420B2 (en) | 1996-08-22 | 1996-08-22 | Dismantling repair method for the upper part of cylindrical wall |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3747420B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007085121A (en) * | 2005-09-26 | 2007-04-05 | Ishii Iron Works Co Ltd | Rotary demolition method for storage tank |
JP2007321357A (en) * | 2006-05-30 | 2007-12-13 | Ishii Iron Works Co Ltd | Method of replacing reservoir side plate |
JP2008184819A (en) * | 2007-01-30 | 2008-08-14 | Ishii Iron Works Co Ltd | Scaffold device used for rotary renewing method of side wall of cylindrical structure |
JP2015147610A (en) * | 2014-02-07 | 2015-08-20 | Jfeメカニカル株式会社 | Jig for replacing bottom plate of existing tank, and method for replacing bottom plate of existing tank by using the same |
JP2016090153A (en) * | 2014-11-05 | 2016-05-23 | 大同特殊鋼株式会社 | Maintenance method for electric furnace |
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1996
- 1996-08-22 JP JP23864296A patent/JP3747420B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007085121A (en) * | 2005-09-26 | 2007-04-05 | Ishii Iron Works Co Ltd | Rotary demolition method for storage tank |
JP2007321357A (en) * | 2006-05-30 | 2007-12-13 | Ishii Iron Works Co Ltd | Method of replacing reservoir side plate |
JP2008184819A (en) * | 2007-01-30 | 2008-08-14 | Ishii Iron Works Co Ltd | Scaffold device used for rotary renewing method of side wall of cylindrical structure |
JP2015147610A (en) * | 2014-02-07 | 2015-08-20 | Jfeメカニカル株式会社 | Jig for replacing bottom plate of existing tank, and method for replacing bottom plate of existing tank by using the same |
JP2016090153A (en) * | 2014-11-05 | 2016-05-23 | 大同特殊鋼株式会社 | Maintenance method for electric furnace |
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JP3747420B2 (en) | 2006-02-22 |
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