JP4904927B2 - Renewal method of storage tank side plate - Google Patents

Renewal method of storage tank side plate Download PDF

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JP4904927B2
JP4904927B2 JP2006149774A JP2006149774A JP4904927B2 JP 4904927 B2 JP4904927 B2 JP 4904927B2 JP 2006149774 A JP2006149774 A JP 2006149774A JP 2006149774 A JP2006149774 A JP 2006149774A JP 4904927 B2 JP4904927 B2 JP 4904927B2
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storage tank
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宏治 石井
晴彦 奥山
和正 佐藤
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株式会社石井鐵工所
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この発明は、貯槽の周囲の作業場所が狭く、火気取扱いなどの安全面も厳しく制限されている場合に、作業性良く安全に解体するための貯槽側板の更新施工法に関するものである。 The present invention relates to a method for renewing a storage tank side plate for safe dismantling with good workability when a working place around a storage tank is narrow and safety aspects such as handling of fire are severely restricted.

円筒形の鋼製の側板周壁を有する大型の貯槽は、建設後長い年月を経過し老朽化すると、安全のために補修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、側板の部分又は全体を更新する必要も生じている。   When a large storage tank having a cylindrical steel side plate peripheral wall is aged for a long time after construction, it needs to be repaired for safety. In addition, there is a need to update the side plate part or the whole by changing the use of the storage tank or changing the location conditions.

従来一般の円筒形貯槽を補修する場合は、図示はしないが、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をクレーン等の重機で吊り上げて降下し、高所より順次下部に向かって補修作業を行っている。このように重機を使って高所より下部に向かって補修する方法は、貯槽周囲にわたって重機が移動する広い作業場所が必要であった。殊に、周囲に危険物を貯蔵する貯槽、稼動設備などがある場所では、重機を使用する作業場所が制限され、火気の飛散対策などの大規模で厳重な安全対策も要求されている。 When repairing a conventional general cylindrical storage tank, although not shown in the figure, first, a total scaffolding is temporarily installed on the entire outer periphery of the side wall of the cylindrical storage tank, and an operator cuts the side wall of the side panel by gas cutting or the like on the scaffold. The blocked side plates are lifted and lowered by heavy machinery such as cranes, and repair work is carried out sequentially from the height toward the bottom. Thus, the method of repairing from the high place to the lower part using the heavy equipment requires a wide working place where the heavy equipment moves around the storage tank. In particular, in places where there are storage tanks and operating facilities for storing dangerous materials in the surroundings, work places where heavy machinery is used are limited, and large-scale and strict safety measures such as measures against fire scattering are also required.

作業性と安全性を配慮した従来技術には、例えば本出願人による特公平2−33821号公報の「円筒形タンクの周壁組立方法」の発明がある。この発明は、まず最下段の周壁を組み、その上端縁にローラーを配置し、このローラーで周壁を回転させながら、限られた一定場所でクレーンと作業足場を使用して上位周壁部を積み上げていく構築法である。 As a conventional technique in consideration of workability and safety, for example, there is an invention of “a method for assembling a peripheral wall of a cylindrical tank” of Japanese Patent Publication No. 2-333821 by the present applicant. In this invention, the lowermost peripheral wall is first assembled, a roller is arranged at the upper edge, and the upper peripheral wall is piled up using a crane and a working scaffold in a limited fixed place while rotating the peripheral wall with this roller. It is a construction method that goes.

特開平8−270226号公報「タンク側板取替施工法」の発明は、貯槽内面に補強リングを水平に取付け、縦通し部材、ホースシューなどの部材で固定し、屋根上に設置した側板吊揚げ治具を使用しウインチで側板を順次下段から切断して取替えるようにしたものである。 Japanese Patent Laid-Open No. 8-270226 “Tank Side Plate Replacement Method” is a side plate lifting method in which a reinforcing ring is horizontally attached to the inner surface of a storage tank and fixed with members such as a longitudinal member and a hose shoe. A side plate is cut from the lower stage sequentially with a winch using a jig and replaced.

また、特開平10−148044号公報「二重殻タンクの構築方法及び同方法に用いられる側板搭載装置」の発明は、最上段側板の上端縁に側板搭載装置を取付け、ホイストレールに吊支ホイストを取付けて側板を構築するものである。 Also, the invention of Japanese Patent Laid-Open No. 10-148044 “A method for constructing a double shell tank and a side plate mounting device used in the same method” has a side plate mounting device attached to the upper edge of the uppermost side plate and a suspension hoist mounted on a hoist rail. The side plate is constructed by attaching

さらにまた、本出願人による特開平10−61246号公報の「円筒形貯槽周壁上部の解体補修工法」の発明は、貯槽の上部の周壁を水平に切断し、ローラーを所定間隔に配設し、回転させながら上部を切断解体し補修する工法であり、また、本出願人による特願2005−277263号の「貯槽の回転解体工法」の発明は、大掛かりな仮設足場を必要とすることなく、所定箇所の解体作業架台と側板下方全周に設置したローラーによって貯槽を回転させながら順次下方に向かって解体を行う工法である。 Furthermore, the invention of the "disassembly repairing method of the upper part of the circumferential wall of the cylindrical storage tank" disclosed in Japanese Patent Application Laid-Open No. 10-61246 by the present applicant cuts the peripheral wall of the upper part of the storage tank horizontally, and arranges the rollers at a predetermined interval. This is a method of cutting, dismantling and repairing the upper part while rotating, and the invention of Japanese Patent Application No. 2005-277263 “Rotating Dismantling Method of Storage Tank” by the present applicant is not required to require a large temporary scaffold. It is a construction method that dismantles sequentially downward while rotating the storage tank with the dismantling work platform at the location and the rollers installed all around the side plate.

特公平2−33821号公報JP-B-2-33821 特開平8−270226号公報JP-A-8-270226 特開平10−148044号公報Japanese Patent Laid-Open No. 10-148044 特開平10−61246号公報JP-A-10-61246 特願2005−277263号Japanese Patent Application No. 2005-277263

従来一般の貯槽の補修方法は、貯槽の全周囲にわたってクレーン等大形の重機が移動する広い作業場所が必要であり、周囲が防液堤に囲われて狭い場合や周囲に危険物を貯蔵する貯槽、稼動設備などがある場所では、作業場所が制限されていた。また、重機の移動と吊上げ降下に伴う地盤の養生や火気の飛散対策などの大規模で厳重な安全対策も要求されていた。 Conventional storage tank repair methods require a large work area where large heavy machinery such as cranes move around the entire circumference of the storage tank, and the surroundings are surrounded by a liquid barrier and are used to store dangerous materials. In places where there are storage tanks and operating equipment, the work place was restricted. Also, large-scale and strict safety measures such as ground curing due to the movement of heavy machinery and lifting and descent and measures against fire scattering were required.

本出願人による特公平2−33821号公報の「円筒形タンクの周壁組立方法」に開示されている発明は、最下段の周壁の上端縁にローラーを配置し回転させながら上位周壁部を一定場所で積み上げていく安全性と作業効率に優れた組立て方法であるが、大形クレーンと作業足場の設置が必要であり、新規貯槽を下段から順次積上げて構築するのには適しているが、既設貯槽を上下から修復するのには適する工法ではない。 The invention disclosed in Japanese Patent Publication No. 2-33381 by the applicant of the present invention discloses a method for assembling a peripheral wall of a cylindrical tank. Although it is an assembly method with excellent safety and work efficiency, it is necessary to install a large crane and work platform, and it is suitable for building up new storage tanks from the bottom, but it is suitable for construction. It is not a suitable method for repairing storage tanks from above and below.

特開平8−270226号公報「タンク側板取替施工法」の発明は、膨大な仮設足場などを設ける必要がなく、作業能率良く補修する工法であるが、屋根上の吊揚げ治具の設置と移設が煩雑であり、側板上下に沿った長い縦通し部材などを必要とするため、大きな貯槽には適さない。 The invention of Japanese Patent Application Laid-Open No. 8-270226, “Tank Side Plate Replacement Method” is a method of repairing with good work efficiency without the need to provide a huge temporary scaffold, etc. Since the transfer is complicated and requires a long longitudinal member along the upper and lower sides of the side plate, it is not suitable for a large storage tank.

また、特開平10−148044号公報「二重殻タンクの構築方法及び同方法に用いられる側板搭載装置」の発明は、側板上端縁を利用して二重殻タンクの内外槽相互の側板を構築するものであって、一重殻の既設貯槽側板の修復に適する工法ではなかった。 In addition, the invention of Japanese Patent Application Laid-Open No. 10-180444 “A method for constructing a double shell tank and a side plate mounting device used in the method” constructs a side plate between the inner and outer tanks of the double shell tank using the upper edge of the side plate. However, this method was not suitable for the restoration of the existing single-shell storage tank side plate.

さらにまた、本出願人による特開平10−61246号公報の「円筒形貯槽周壁上部の解体補修工法」に開示されている発明は、ウインドガーダーが取付けられている大型浮屋根式円筒形貯槽の周壁上部を解体補修する場合に適する工法であって、貯槽の周壁上部を回転させながら安全に効率良く一定場所で所定箇所を解体補修することができ、また、本出願人による特願2005−277263号の「貯槽の回転解体工法」の発明は、所定箇所の解体作業架台と全周設置のローラーによって貯槽側板を回転させながら順次下方に向かって作業性良く解体するものであるが、上記本出願人によるローラーを配置した回転施工法は、いずれも側板の中間部を残すなどして下部と上部を共に取替えるのには適した工法ではなかった。 Furthermore, the invention disclosed in Japanese Patent Application Laid-Open No. 10-61246 by the applicant of the present invention discloses a peripheral wall of a large floating roof type cylindrical storage tank to which a wind girder is attached. This is a method suitable for dismantling and repairing the upper part, and can be dismantled and repaired at a predetermined place safely and efficiently while rotating the upper part of the peripheral wall of the storage tank. Japanese Patent Application No. 2005-277263 by the present applicant The invention of the “rotary dismantling method of storage tank” is to dismantle the storage tank side plate sequentially downward with good workability while rotating the storage tank side plate by a dismantling work platform at a predetermined location and a roller installed all around. None of the rotating construction methods using the rollers according to the method were suitable for exchanging the lower part and the upper part together by leaving the middle part of the side plate.

この発明の目的は、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、貯槽の側板を下部及び上部にわたって取替える際に、貯槽の周囲が狭く重機が入らず作業性が良くない場合に、安全性に優れ作業性が良い側板の更新施工法を提供するものである。 The object of the present invention was made in view of the problems of the prior art as described above, and when replacing the side plate of the storage tank over the lower part and the upper part, the periphery of the storage tank is so narrow that heavy machinery does not enter and workability is not good. In this case, a method for renewing a side plate that is excellent in safety and workability is provided.

請求項1記載の貯槽側板の更新施工法は、側板を取替える円筒形貯槽の所定エリアに吊上げ搬送用の重機を設置し、最下段1段目と2段目など低位置の側板は、2段目の側板又は中間位置最下部の側板の外側円周方向の水平に取り付けたレールに沿って走行するトロリ付チェーンブロックで順次所定長の大きさの側板を搬送するレールリフト工法にて側板の取り替え作業を行い、前記円筒形貯槽の中間から上方の複数段の側板は、既設側板2段目の下端縁全周にわたって切欠き水平にプロテクターを設置し、該プロテクターに案内されて回転駆動するローラーと駆動ローラーを備えたローラー部材を間隔をおいて1段目の新設側板の上端部に設置し、該ローラー部材で中間から上方の円筒体側板を全回転させるリボルバー工法にて円筒形貯槽の上段から中間へと順次側板を取り替え、側板の搬送を上記重機を使用して吊上げ搬送して取替えるものである。
The method for renewing the storage tank side plate according to claim 1 is that a heavy machine for lifting and transporting is installed in a predetermined area of the cylindrical storage tank where the side plate is replaced, and the lower side plate such as the first and second stages at the bottom is two stages. Side plate replacement by rail lift method that sequentially transports side plates of a predetermined length with a chain block with a trolley that runs along a rail attached horizontally in the outer circumferential direction of the side plate at the bottom of the middle position or the side plate at the middle position A plurality of side plates from the middle to the upper part of the cylindrical storage tank are cut out over the entire lower edge of the second side of the existing side plate, a protector is installed horizontally, and a roller and a drive that are driven to rotate by the protector are driven. A cylindrical storage tank is installed by a revolver method in which a roller member equipped with a roller is installed at the upper end of the first side plate at the first stage at intervals, and the upper cylindrical side plate is rotated completely from the middle by the roller member. Sequentially replacing the side plates and from the upper to the middle, the conveyance of the plate is intended to replace and transport Lifting using the heavy equipment.

請求項2記載の貯槽側板の更新施工法は、上記低位置の側板の取替えは、前記側板の外側円周方向の水平に取り付けたレールに沿って走行するトロリ付チェーンブロックで行い、該トロリ付チェーンブロックを重機の代替として既設側板の搬出及び新設側板の搬入を行うレールリフト工法にて行い、次に上記中間から上方の複数段の側板の取替えは、上記プロテクターに案内されて回転駆動するローラー部材により前記円筒形貯槽の中間から上方の複数段の側板を全回転させ、円筒形貯槽の最上段の側板の一周取替えを行い、次いで上記ローラー部材前記円筒形貯槽の中間から上方の複数段の側板を一周回転させながら側板を一周取替えした後、順次側板各段を下方に向かって取替えるリボルバー工法にて行い、最後に既設側板2段目に取り付けたトロリ付チェーンブロックを中間位置最下部の側板の外側円周方向の水平に取り付け、2段目の既設側板及びローラー機材を除去し新規側板を差込んで取替えるレールリフト工法にて行うものである。
The renewal construction method of the storage tank side plate according to claim 2 , wherein the replacement of the low side plate is performed by a chain block with a trolley that runs along a rail attached horizontally in the outer circumferential direction of the side plate . the chain block as a heavy equipment alternatives have row at row cormorants rail lifting method the loading of the unloading and new plates already side where plate, then replacement of the side plates of the plurality of stages of upward from the intermediate is guided into the protector The roller plate that is driven to rotate rotates the side plates of the upper plurality of stages from the middle of the cylindrical storage tank, and makes one round replacement of the uppermost side plate of the cylindrical storage tank . Then, the roller member from the middle of the cylindrical storage tank after that is similar to one rotation of the side plates of the upper plurality of stages was replaced around the al side plate, carried by sequentially revolver construction method of side plates each stage Ru replacement downward, finally taken to the second stage existing plate And performs trolley with chain blocks attached horizontally mounted in the outer circumferential direction of the intermediate position the bottom of the side plate, at the second stage of the existing plate and rail lift method to replace crowded difference new plate to remove roller gear is there.

請求項1記載の貯槽側板の更新施工法は、側板を取替える円筒形貯槽の所定エリアに吊上げ搬送用の重機を設置し、最下段1段目と2段目など低位置の側板は、2段目の側板又は中間位置最下部の側板の外側円周方向の水平に取り付けたレールに沿って走行するトロリ付チェーンブロックで順次所定長の大きさの側板を搬送するレールリフト工法にて側板の取り替え作業を行い、前記円筒形貯槽の中間から上方の複数段の側板は、既設側板2段目の下端縁全周にわたって切欠き水平にプロテクターを設置し、該プロテクターに案内されて回転駆動するローラーと駆動ローラーを備えたローラー部材を間隔をおいて1段目の新設側板の上端部に設置し、該ローラー部材で中間から上方の円筒体側板を全回転させるリボルバー工法にて円筒形貯槽の上段から中間へと順次側板を取り替え、側板の搬送を上記重機を使用して吊上げ搬送して取替えるので、
貯槽の周囲が狭く作業性の良くない場合においても、大掛かりな重機の移動などを必要とすることなく簡単なレールリフト機材とローラー機材及び所定位置の重機を用いて更新施工することができる。また、周囲に稼動中の貯槽や機器設備がある場合に、所定位置の重機を使って吊上げ搬送を行うので、重機の移動及び吊り搬送に伴う地盤の養生や落下飛散防止対策などを必要とすることなく安全に更新作業ができる。
The method for renewing the storage tank side plate according to claim 1 is that a heavy machine for lifting and transporting is installed in a predetermined area of the cylindrical storage tank where the side plate is replaced, and the lower side plate such as the first and second stages at the bottom is two stages. Side plate replacement by rail lift method that sequentially transports side plates of a predetermined length with a chain block with a trolley that runs along a rail attached horizontally in the outer circumferential direction of the side plate at the bottom of the middle position or the side plate at the middle position A plurality of side plates from the middle to the upper part of the cylindrical storage tank are cut out over the entire lower edge of the second side of the existing side plate, a protector is installed horizontally, and a roller and a drive that are driven to rotate by the protector are driven. A cylindrical storage tank is installed by a revolver method in which a roller member equipped with a roller is installed at the upper end of the first side plate at the first stage at intervals, and the upper cylindrical side plate is rotated completely from the middle by the roller member. Sequentially replacing the side plates and from the upper to the intermediate, since replacement of the transport side plates and conveyed Lifting using the heavy equipment,
Even when the surroundings of the storage tank are narrow and workability is not good, renewal construction can be performed using simple rail lift equipment, roller equipment, and heavy equipment at a predetermined position without requiring large-scale movement of heavy equipment. In addition, when there is an operating storage tank or equipment nearby, lifting and transporting is performed using heavy equipment at a predetermined position, so it is necessary to take measures such as ground curing and fall scattering prevention due to heavy equipment movement and suspension transportation. The update can be done safely without any problems.

請求項2記載の貯槽側板の更新施工法は、上記低位置の側板の取替えは、前記側板の外側円周方向の水平に取り付けたレールに沿って走行するトロリ付チェーンブロックで行い、該トロリ付チェーンブロックを重機の代替として既設側板の搬出及び新設側板の搬入を行うレールリフト工法にて行い、次に上記中間から上方の複数段の側板の取替えは、上記プロテクターに案内されて回転駆動するローラー部材により前記円筒形貯槽の中間から上方の複数段の側板を全回転させ、円筒形貯槽の最上段の側板の一周取替えを行い、次いで上記ローラー部材前記円筒形貯槽の中間から上方の複数段の側板を一周回転させながら側板を一周取替えした後、順次側板各段を下方に向かって取替えるリボルバー工法にて行い、最後に既設側板2段目に取り付けたトロリ付チェーンブロックを中間位置最下部の側板の外側円周方向の水平に取り付け、2段目の既設側板及びローラー機材を除去し新規側板を差込んで取替えるレールリフト工法にて行うので、
貯槽の周囲を広範囲に移動する大型の重機の設置を必要とすることなく、最下段の側板を取替えた後に上段の側板から順次作業性良く取替え更新を行うことができる。また、重機を用いた作業は所定のエリア内で行うので安全作業となり、貯槽の更新作業は低位置と回転による上段から下段への移動とによって順次進行するため、作業性が良く短い工期で能率良く施工することができる。
The renewal construction method of the storage tank side plate according to claim 2 , wherein the replacement of the low side plate is performed by a chain block with a trolley that runs along a rail attached horizontally in the outer circumferential direction of the side plate . the chain block as a heavy equipment alternatives have row at row cormorants rail lifting method the loading of the unloading and new plates already side where plate, then replacement of the side plates of the plurality of stages of upward from the intermediate is guided into the protector The roller plate that is driven to rotate rotates the side plates of the upper plurality of stages from the middle of the cylindrical storage tank, and makes one round replacement of the uppermost side plate of the cylindrical storage tank . Then, the roller member from the middle of the cylindrical storage tank after that is similar to one rotation of the side plates of the upper plurality of stages was replaced around the al side plate, carried by sequentially revolver construction method of side plates each stage Ru replacement downward, finally taken to the second stage existing plate Since the trolley with chain blocks attached horizontally mounted in the outer circumferential direction of the intermediate position the bottom of the plate is carried out at the second stage of the existing plate and rail lift method to replace crowded difference new plate to remove roller gear,
Without requiring the installation of a large heavy machine that moves around the storage tank in a wide range, after the lower side plate is replaced, the replacement can be performed sequentially from the upper side plate with good workability. In addition, work using heavy machinery is performed safely within a predetermined area, and the storage tank renewal work proceeds in sequence by the low position and the movement from the upper stage to the lower stage due to rotation. It can be constructed well.

この発明に係る貯槽側板の更新施工法、レールリフト工法とリボルバー工法を組み合わせた手順の概略を、項目1〜8に示す。1.接続配管、付属物等を貯槽から切り離し縁切りする。貯槽周囲に接続している配管、付属物などを縁切りし、貯槽を回転可能にする。2.側板2段目より上方の所定位置に、レールリフト工法で使用するレール部材、トロリ付チェーンブロック等を設置する。(レールリフト工法の準備)3.側板1段目をレールリフト工法で更新する。(レールリフト工法の施工) 既設の側板1段目の所定幅を切断、搬出し、次いで、新規の側板1段目を搬入し溶接施工する。順次周方向に繰返し施工する。搬出、搬入の移送には、上記トロリ付チェーンブロック等を使用する。4.既設側板2段目をくり抜き、リボルバー工法で使用する回転用プロテクターとローラー部材を設置する。(リボルバー工法の準備) プロテクターは既設側板2段目の下端縁全周にわたって水平に設置し、ローラー部材は新設側板1段目上端縁の所定位置に隔離してセットする。5.ローラーで回転させながらリボルバー工法で側板最上段全周から下段全周にわたって、順次側板の3段目まで更新する。(リボルバー工法の施工) 所定の作業エリアに重機を設置して所定位置にて吊上げ移動する。6.側板2段目をレールリフト工法で更新する。(レールリフト工法の施工)既設の側板2段目の所定幅を切断し、回転用プロテクター、ローラー部材も除去し搬出する。次いで、新規の側板2段目を搬入し溶接施工する。順次周方向に繰返し施工する。側板の搬出、搬入の移送には、レール部材及びトロリ付チェーンブロック等を使用する。7.レール部材、トロリ付チェーンブロック等を取り外す。8.配管など付属物の縁切りを復旧する。 The outline of the procedure which combined the renewal construction method of the storage tank side plate concerning this invention, a rail lift construction method, and a revolver construction method is shown to items 1-8. 1. Disconnect connection pipes and accessories from storage tanks and cut edges. The piping and accessories connected to the periphery of the storage tank are cut off to make the storage tank rotatable. 2. A rail member used in the rail lift method, a chain block with a trolley, and the like are installed at a predetermined position above the second stage of the side plate. (Preparation of rail lift method) 3. The first step of the side plate is updated by the rail lift method. (Construction of rail lift method) The predetermined width of the first stage of the existing side plate is cut and carried out, and then the first stage of the new side plate is carried in and welded. Sequentially repeat in the circumferential direction. The above-mentioned chain block with a trolley or the like is used for carrying out and carrying in. 4). The second stage of the existing side plate is cut out, and a protector for rotation and a roller member used in the revolver method are installed. (Preparation of the revolver method) The protector is installed horizontally over the entire circumference of the lower edge of the second stage of the existing side plate, and the roller member is set at a predetermined position on the upper edge of the first stage of the new side plate. 5. While rotating with a roller, the revolver method is used to update the third step of the side plate in sequence from the uppermost part of the side plate to the entire lower part. (Construction of revolver method) A heavy machine is installed in a predetermined work area and lifted and moved at a predetermined position. 6). Update the second stage of the side plate using the rail lift method. (Construction of the rail lift method) The predetermined width of the second stage of the existing side plate is cut, and the protector for rotation and the roller member are also removed and carried out. Next, a new second side plate is carried in and welded. Sequentially repeat in the circumferential direction. A rail member, a chain block with a trolley, etc. are used for carrying out a side plate and transferring it in. 7). Remove the rail member and chain block with trolley. 8). Restore the edge cut of the piping and other accessories.

この発明に係る貯槽側板の回転更新施工法の実施形態を、図1乃至図6に基づいて説明する。 図1は、最下段1段目の側板を、レール吊上げ搬送工法、つまりレールリフト工法によって交換している状況を示す全体説明図、図2は図1のレールリフト工法の縦断面状況を示す図である。図3aは、新規更新した側板1段目の上端部に、既設の側板2段目をくり抜いてローラー及びプロテクターを設置した正面図であり、図3bはその縦断面を示す。図4は、貯槽の上部側板を、全回転工法、つまりリボルバー工法で交換している状況を示す全体説明図である。図5は、レールリフト工法で側板1段目上端部のローラー及びプロテクターを除去し側板2段目を交換している状況を示す縦断面図である。図6は、貯槽周辺の平面配置図である。 An embodiment of a rotation renewal construction method for a storage tank side plate according to the present invention will be described with reference to FIGS. FIG. 1 is an overall explanatory view showing a state where the first side plate at the lowest stage is replaced by a rail lifting conveyance method, that is, a rail lift method, and FIG. 2 is a diagram showing a vertical cross-sectional state of the rail lift method of FIG. It is. FIG. 3A is a front view in which a roller and a protector are installed by hollowing out the second stage of the existing side plate at the upper end of the first stage of the newly updated side plate, and FIG. 3B shows a longitudinal section thereof. FIG. 4 is an overall explanatory view showing a state in which the upper side plate of the storage tank is replaced by the full rotation method, that is, the revolver method. FIG. 5 is a longitudinal sectional view showing a state in which the roller and the protector at the upper end of the first step of the side plate are removed and the second step of the side plate is replaced by the rail lift method. FIG. 6 is a plan layout view around the storage tank.

図6のハッチングで示すように、更新施工を行う円筒形の貯槽1は、周囲の三方を既設貯槽と防液提24に囲まれ、前方は通路25に面している。 このように周囲が狭い場所では、貯槽の周囲全体にわたって重機を移動させて、吊り作業や搬入、搬出の作業を行うことは困難である。そこで、前方の通路25を作業エリア26として、この限定された作業エリア2
6にクレーン等大形の重機を設置して吊上げや搬入搬出の作業を行う。
As shown by hatching in FIG. 6, the cylindrical storage tank 1 that performs the renewal construction is surrounded by the existing storage tank and the liquid barrier 24 on the three sides, and the front faces the passage 25. In such a place where the periphery is narrow, it is difficult to move the heavy machinery over the entire periphery of the storage tank and perform the work of hanging, loading and unloading. Therefore, the front passage 25 is used as a work area 26, and this limited work area 2 is used.
A large heavy machine such as a crane is installed in 6 to perform lifting and loading / unloading work.

図1に示すように、貯槽1の通路25を作業エリア26とし、この所定の作業エリア内に重機27を設置して、更新する側板片の運搬作業を行う。 貯槽1の側板3の上方、所定高さ位置、例えば側板2段目又はn段目の円周方向全周にわたって水平方向に搬送用のレール4を設置し、重機27が使用することができない周囲の最下段側板1段目など下方の側板は、このレール4を使用して吊上げ移送を行う。 このように側板1段目など下方の側板は、レール4を使用するレールリフト工法で周方向に向かって順次搬出、搬入して更新する。 As shown in FIG. 1, the passage 25 of the storage tank 1 is used as a work area 26, and a heavy machine 27 is installed in the predetermined work area to carry the updated side plate pieces. Around the side plate 3 of the storage tank 1, around a predetermined height position, for example, the side plate 2 or n-th stage in the circumferential direction where the rail 4 for transportation is installed in the horizontal direction and the heavy equipment 27 cannot be used. The lower side plate such as the first step of the lowermost side plate is lifted and transferred using this rail 4. In this way, the lower side plate such as the first step of the side plate is sequentially carried out and carried in the circumferential direction by the rail lift method using the rails 4 and is updated.

図2に示すように、側板n段目位置、例えば側板2段目3−2の壁面に、レールリフト工法で使用するレール4を設置し、このレール4に吊上げ用のトロリ付チェーンブロック7を懸架する。レール4は例えばI型鋼を用いて周方向に連続させ、このレール4の取付部材6及びブラケット7は成形鋼材を用いて隔離して複数個を側板面に固着する。複数個のトロリ付チェーンブロック7をレール4に懸架し、切断除去した側板1段目3−1の単片を吊上げて搬出し、次いで新規の側板1段目3−1の単片を吊上げて搬入して上記除去した位置に取付ける。 As shown in FIG. 2, a rail 4 used in the rail lift method is installed on the n-th position of the side plate, for example, the wall surface of the second step 3-2 of the side plate, and a chain block 7 with a trolley for lifting is attached to the rail 4. Suspend. The rail 4 is made to be continuous in the circumferential direction using, for example, I-shaped steel, and the mounting member 6 and the bracket 7 of the rail 4 are isolated using a formed steel material, and a plurality are fixed to the side plate surface. A plurality of chain blocks 7 with trolleys are suspended on the rail 4 and the single piece of the side plate first stage 3-1 that has been cut and removed is lifted and carried out, and then the single piece of the new side plate first stage 3-1 is lifted up. Carry in and install at the removed position.

リボルバー工法を実施するためには、図3a,図3bに示すように、新規設置した側板1段目3−1の周壁上部、既設の側板2段目3−2をくり抜いてピッチ1メートルから数メートル程度隔離した適所に、円周方向にわたって複数の開口部9を切り欠き、この開口部9に回転ローラー10を設置する。また電動で回転して送り出す駆動ローラー11を必要数適所に設置する。12は架台、13は荷重支持用のブラケットである。 In order to carry out the revolver method, as shown in FIGS. 3a and 3b, the upper part of the peripheral wall of the newly installed side plate 1st stage 3-1 and the existing side plate 2nd stage 3-2 are hollowed out and the number of pitches from 1 meter to several A plurality of openings 9 are cut out at appropriate positions separated by about a meter along the circumferential direction, and a rotating roller 10 is installed in the openings 9. Moreover, the drive roller 11 which rotates electrically and sends out is installed in a required number of suitable places. Reference numeral 12 denotes a gantry and 13 denotes a load support bracket.

図3aに示すように、既設の側板2段目3−2の下端縁を水平に切断し、円周方向に沿って回転用のプロテクター14を固着する。このプロテクター14に上記ローラー10、11を当ててガイドし、上部の側板3が水平に円滑に回転するように設置する。また、図3bに示すように、新規の側板1段目3−1の内側底板の間には、成形鋼材からなる傾斜材のサポート15を設置して側板3を垂直に安定化させて支持する。上記準備した後に、上部側板及び付属物が、内外の部材に接触することなく水平かつ円滑に一回転することを確認する。 As shown in FIG. 3a, the lower end edge of the existing side plate second stage 3-2 is cut horizontally, and the protector 14 for rotation is fixed along the circumferential direction. The protectors 14 are guided by the rollers 10 and 11, and installed so that the upper side plate 3 rotates smoothly and horizontally. Moreover, as shown in FIG. 3b, between the inner bottom plates of the first side plate 3-1 of the new side plate, an inclined material support 15 made of a formed steel material is installed to stabilize and support the side plate 3 vertically. . After the above preparation, it is confirmed that the upper side plate and the accessory make a single horizontal and smooth rotation without contacting the inner and outer members.

図4に示すように、通路25の作業エリア26に、クレーンなどの重機27を設置し、 上記のように設けたローラー10、11を使用し、リボルバー工法で側板3を水平に回転させて、側板上部N段目の更新作業を行い、一周にわたって更新が終了した後に、下段の側板に順次移動してさらに一周の更新を行い、順次下段の側板に移動して、上方から下方に向かって側板3の更新作業を継続する。 As shown in FIG. 4, a heavy machine 27 such as a crane is installed in the work area 26 of the passage 25, and the side plates 3 are rotated horizontally by the revolver method using the rollers 10 and 11 provided as described above. After the update work for the upper N stage of the side plate is completed and the update is completed over one round, the side plate is sequentially moved to the lower side plate and further updated for one round. Continue the update work of 3.

このように、重機27を所定位置の作業エリア26に設置して、貯槽を回転させながら順次取替部材の搬入、搬出を行うため、作業はやり易くなる。側板上部の取替えは、上方から下方に向けて順次作業が進行するため、安全性に優れ作業性が良く短時間で能率良く更新をすることができる。 Thus, since the heavy machinery 27 is installed in the work area 26 at a predetermined position and the replacement member is sequentially carried in and out while rotating the storage tank, the work becomes easy. The replacement of the upper side plate proceeds sequentially from the upper side to the lower side, so that it is excellent in safety, has good workability, and can be updated efficiently in a short time.

図5に示すように、リボルバー工法で使用したローラー10、11の除去、及び既設の側板2段目3−2の更新は、側板n段目位置、例えば側板3段目3−3壁面に取付けたレール4とトロリ付チェーンブロック7を搬出、搬入に使用してレールリフト工法で行う。 As shown in FIG. 5, the removal of the rollers 10 and 11 used in the revolver method and the renewal of the existing side plate second stage 3-2 are performed on the side plate n stage position, for example, the side plate third stage 3-3 wall surface. The rail 4 and the chain block 7 with the trolley are carried out and used for carrying in by the rail lift method.

上述のように、更新施工する貯槽の周囲が狭く作業性が良くない場合、周囲に稼動中の貯槽や設備がある場合などに、周囲を移動する重機を必要とすることなく、簡単なレールリフト部材とローラー回転部材と所定位置の重機を用いて安定的に側板の更新施工を行うことができる。また、周囲が広く搬送に適する所定エリアにて重機を用いた作業を行うので、貯槽全周に火気や切断片などが飛散することなく、大掛かりな防炎シートなどの仮設材や養生材も低減することができ、安全作業で作業性良く更新作業ができる。 As mentioned above, when the surroundings of the storage tank to be renewed are narrow and workability is poor, or when there are storage tanks or equipment in operation in the surrounding area, a simple rail lift is required without requiring heavy equipment to move around. The side plate can be stably updated by using the member, the roller rotating member, and the heavy machine at a predetermined position. In addition, work using heavy machinery is performed in a predetermined area that is wide and suitable for transport, so there is no fire or cuts scattered around the entire circumference of the storage tank, and temporary materials such as large flameproof sheets and curing materials are reduced. It is possible to perform the update work with good workability with safety work.

この発明に係る貯槽の回転解体工法は、周囲が狭く限られた場所や周囲に危険物などがある種々の構築物などの限られた修復作業において、簡単かつ安全に行うことができるため、簡単なレール部材とローラー部材と重機を設置して更新施工を行う場合に適用することができる。 The rotary dismantling method of the storage tank according to the present invention is simple because it can be easily and safely performed in limited repair work such as various structures with a narrow and limited place and dangerous objects in the vicinity. It can be applied when renewal construction is performed by installing rail members, roller members, and heavy machinery.

この発明に係るレールリフト工法で貯槽の最下段1段目側板を交換している状況を示す全体説明図である。It is a whole explanatory view showing the situation where the lowermost 1st stage side board of a storage tank is replaced by the rail lift method concerning this invention. 図1のレールリフト工法の実施状況を示す縦断面図である。It is a longitudinal cross-sectional view which shows the implementation condition of the rail lift method of FIG. 新規更新の側板1段目上に、既設の側板2段目をくり抜いてローラー及びプロテクターを設置した正面図である。It is the front view which cut out the existing 2nd step of the side plate on the 1st step of the newly updated side plate, and installed the roller and the protector. 図3aの縦断面図である。FIG. 3b is a longitudinal sectional view of FIG. 3a. リボルバー工法で貯槽の上部側板を交換している状況を示す全体説明図である。It is whole explanatory drawing which shows the condition which has replaced the upper side plate of the storage tank by the revolver construction method. レールリフト工法でローラー及びプロテクターを除去し側板2段目を交換している状況を示す縦断面図である。It is a longitudinal cross-sectional view which shows the condition which removes a roller and a protector by the rail lift construction method, and has replaced the 2nd step | paragraph of the side plate. 解体する貯槽の配置状態を示す平面図である。It is a top view which shows the arrangement | positioning state of the storage tank to dismantle.

符号の説明Explanation of symbols

1 貯槽
2 屋根
3 側板
3−1 側板1段目
3−2 側板2段目
3−N 側板N段目
4 レール
5 取付架台
6 ブラケット
7 トロリ付チェーンブロック
8 底板
9 切断開口部
10 回転ローラー
11 駆動ローラー
12 架台
13 ブラケット
14 プロテクター
15 傾斜材サポート
24 防液堤
25 通路
26 作業エリア
27 重機

1 Storage tank
2 Roof
3 Side plate
3-1 Side plate 1st stage
3-2 Second stage of side plate
3-N Side plate Nth stage
4 rails
5 Mounting base
6 Bracket
7 Chain block with trolley
8 Bottom plate
9 Cutting opening
10 Rotating roller
11 Drive roller
12 frame
13 Bracket
14 Protector
15 Inclined material support
24 Breakwater
25 passage
26 work area
27 Heavy machinery

Claims (2)

側板を取替える円筒形貯槽の所定エリアに吊上げ搬送用の重機を設置し、最下段1段目と2段目など低位置の側板は、2段目の側板又は中間位置最下部の側板の外側円周方向の水平に取り付けたレールに沿って走行するトロリ付チェーンブロックで順次所定長の大きさの側板を搬送するレールリフト工法にて側板の取り替え作業を行い、
前記円筒形貯槽の中間から上方の複数段の側板は、既設側板2段目の下端縁全周にわたって切欠き水平にプロテクターを設置し、該プロテクターに案内されて回転駆動するローラーと駆動ローラーを備えたローラー部材を間隔をおいて1段目の新設側板の上端部に設置し、該ローラー部材で中間から上方の円筒体側板を全回転させるリボルバー工法にて円筒形貯槽の上段から中間へと順次側板を取り替え、側板の搬送を上記重機を使用して吊上げ搬送して取替えることを特徴とする貯槽側板の更新施工法。
A heavy machine for lifting and transporting is installed in a predetermined area of the cylindrical storage tank where the side plate is replaced. The lower side plate such as the first and second tiers is the outer circle of the second tier side plate or the lowest middle tier side plate. The side plate is replaced by a rail lift method that sequentially conveys a side plate of a predetermined length with a chain block with a trolley that runs along a rail mounted horizontally in the circumferential direction.
The plurality of side plates from the middle to the upper side of the cylindrical storage tank are provided with a roller and a driving roller that are notched over the entire circumference of the lower edge of the second step of the existing side plate and are horizontally driven by the protector. A roller member is installed at the upper end of the new side plate at the first stage at intervals, and the side plate is sequentially moved from the upper stage to the middle of the cylindrical storage tank by the revolver method in which the cylindrical side plate is rotated from the middle to the upper side with the roller member. The method for renewing the storage tank side plate is characterized in that the side plate is lifted and transferred using the above heavy machinery.
上記低位置の側板の取替えは、前記側板の外側円周方向の水平に取り付けたレールに沿って走行するトロリ付チェーンブロックで行い、該トロリ付チェーンブロックを重機の代替として既設側板の搬出及び新設側板の搬入を行うレールリフト工法にて行い、
次に上記中間から上方の複数段の側板の取替えは、上記プロテクターに案内されて回転駆動するローラー部材により前記円筒形貯槽の中間から上方の複数段の側板を全回転させ、円筒形貯槽の最上段の側板の一周取替えを行い、次いで上記ローラー部材前記円筒形貯槽の中間から上方の複数段の側板を一周回転させながら側板を一周取替えした後、順次側板各段を下方に向かって取替えるリボルバー工法にて行い
最後に既設側板2段目に取り付けたトロリ付チェーンブロックを中間位置最下部の側板の外側円周方向の水平に取り付け、2段目の既設側板及びローラー機材を除去し新規側板を差込んで取替えるレールリフト工法にて行うことを特徴とする請求項1記載の貯槽側板の更新施工法。
The low position replacement of the side plates of performed outside circumferential trolley with chain block traveling along the horizontal mounting rails of the side plates, out of the already side where plate the trolley with the chain block the heavy equipment alternatives and have a row at row cormorant rail lift method the loading of the new side plates,
Next, the plurality of side plates from the middle to the upper side are replaced by rotating the plurality of side plates from the middle to the upper side of the cylindrical storage tank by a roller member that is guided by the protector to rotate. perform replacement round of the upper plate, and then after such by one rotation of the side plate of the plurality of stages of upward from the middle of the cylindrical reservoir by the roller member has been replaced around the al side plate, toward the turn plate each stage downward be made in Ru replaced Te revolver method,
Finally, attach the chain block with trolley attached to the second step of the existing side plate horizontally in the outer circumferential direction of the side plate at the bottom of the middle position , remove the existing second side plate and roller equipment and replace the new side plate. The method for renewing a storage tank side plate according to claim 1, wherein the method is performed by a rail lift method .
JP2006149774A 2006-05-30 2006-05-30 Renewal method of storage tank side plate Active JP4904927B2 (en)

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JP4895221B2 (en) 2008-03-06 2012-03-14 千代田化工建設株式会社 Partial renewal construction method for trunk plates of tower tanks
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JPH08270226A (en) * 1995-03-29 1996-10-15 Niigata Koji Kk Tank side plate replacement method
JP3747420B2 (en) * 1996-08-22 2006-02-22 株式会社石井鐵工所 Dismantling repair method for the upper part of cylindrical wall
JPH10148044A (en) * 1996-11-19 1998-06-02 Nippon Steel Corp Construction method of double shell tank and side plate mounting device used for the method
JP2006056525A (en) * 2004-08-17 2006-03-02 Chugoku Electric Power Co Inc:The Storage tank repairing method

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