JP5510863B2 - Floating roof dismantling construction method for floating roof storage tank - Google Patents
Floating roof dismantling construction method for floating roof storage tank Download PDFInfo
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- JP5510863B2 JP5510863B2 JP2009111354A JP2009111354A JP5510863B2 JP 5510863 B2 JP5510863 B2 JP 5510863B2 JP 2009111354 A JP2009111354 A JP 2009111354A JP 2009111354 A JP2009111354 A JP 2009111354A JP 5510863 B2 JP5510863 B2 JP 5510863B2
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- 238000010276 construction Methods 0.000 title claims description 39
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000007634 remodeling Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
この発明は浮屋根式貯槽の浮屋根を修復や取替えなどの解体工事を行う浮屋根式貯槽の浮屋根解体工事施工法に関するものである。 The present invention relates to a floating roof dismantling construction method for a floating roof storage tank that performs dismantling work such as restoration and replacement of the floating roof of the floating roof storage tank.
浮屋根式貯槽は、浮屋根に腐食や損傷が生じた場合や変形などした場合、或いは耐震性や耐久性を向上するために、浮屋根を底板上の所定高さに保持した状態で、浮屋根の修復や取替えなどの解体工事を行っている。
例えば、シングルデッキ構造の浮屋根をダブルデッキ構造の浮屋根に改造する場合、或いは内部浮き蓋付き貯槽、つまりドーム屋根やコーンルーフ屋根付き貯槽の内部に設けられている浮屋根の修復や取替え、改造などを行う場合がある。
Floating roof storage tanks are used when the floating roof is corroded or damaged, or is deformed, or in order to improve seismic resistance and durability, with the floating roof held at a predetermined height above the bottom plate. Demolition work such as roof restoration and replacement.
For example, when remodeling a floating roof with a single deck structure to a floating roof with a double deck structure, or repairing or replacing a floating roof provided inside a storage tank with an internal floating lid, that is, a storage tank with a dome roof or a cone roof roof, There are cases where modifications are made.
図８は、一般的なシングルデッキ構造の浮屋根式貯槽を示す。
原油その他の揮発性・可燃性液体を貯蔵する大型の浮屋根式貯槽１は、円形平板の底板２と、円筒体形状の側板３と、この側板３内部の貯蔵液４の液面上に浮べた浮蓋状で一枚板、つまりシングルデッキ構造の浮屋根５とから形成されている。
この浮屋根５は、貯蔵液４の蒸発を抑制し、貯蔵液４へ雨水や異物などが混入するのを防止するように形成され、浮屋根５は一枚の薄板鋼板のデッキ板６と、このデッキ板６外周の環状箱体の外周ポンツーン７とから形成される。
この外周ポンツーン７と側板３内面との間隙には、気密性を保持するシール装置８と、その上部に雨よけ板９が設けられている。また、浮屋根５の上に降る雨水をデッキ板６の中心部に集めて貯槽外部へ排水するルーフドレン１０、さらに必要に応じてベースヒータ１１などの付属部材が設けられている。
FIG. 8 shows a floating roof type storage tank having a general single deck structure.
A large floating roof storage tank 1 for storing crude oil and other volatile and flammable liquids floats on the bottom of a circular flat plate 2, a cylindrical side plate 3, and a storage liquid 4 inside the side plate 3. It is formed from a single plate, that is, a floating roof 5 having a single deck structure.
The floating roof 5 is formed so as to suppress evaporation of the storage liquid 4 and prevent the rainwater or foreign matter from being mixed into the storage liquid 4. The floating roof 5 includes a single thin steel plate deck plate 6, The deck plate 6 is formed from an outer peripheral pontoon 7 of an annular box around the outer periphery.
In the gap between the outer peripheral pontoon 7 and the inner surface of the side plate 3, a sealing device 8 for maintaining airtightness and a rain screen 9 are provided on the upper portion thereof. A roof drain 10 that collects rainwater falling on the floating roof 5 at the center of the deck plate 6 and drains it to the outside of the storage tank, and an additional member such as a base heater 11 as necessary.
従来一般に浮屋根の部分又は全体の取替えや修復などを行う際は、図９及び図１０に示すように、シングルデッキ構造の浮屋根５を底板２上方の所定高さ位置に降下させて、デッキサポート１２及び仮設の架台１３で支持し、この架台１３の上でデッキ板６や外周ポンツーン７などを切断している。 Conventionally, when replacing or repairing a floating roof part or the whole, as shown in FIGS. 9 and 10, the floating roof 5 having a single deck structure is lowered to a predetermined height position above the bottom plate 2, and the deck is It is supported by a support 12 and a temporary mount 13, and the deck plate 6 and the outer peripheral pontoon 7 are cut on the mount 13.
図９は、従来例の浮屋根解体工事施工の事例で、クレーン１４を使用して浮屋根５の切断片を吊上げて搬出する場合を示す全体説明図である。
上方が開放されている浮屋根式貯槽１の場合には、図９のように貯槽外部にクレーン１４を設置して解体した浮屋根５の切断片を吊上げて側板３を超えて貯槽外部へ搬出撤去している。
FIG. 9 is an overall explanatory view showing a case of lifting a cut piece of the floating roof 5 using the crane 14 and carrying it out in the case of the floating roof dismantling construction work of the conventional example.
In the case of the floating roof type storage tank 1 that is open at the top, as shown in FIG. 9, a cut piece of the floating roof 5 that is disassembled by installing a crane 14 outside the storage tank is lifted and carried out beyond the side plate 3 to the outside of the storage tank. It has been removed.
図１０は、従来例の浮屋根解体工事施工の他の事例で、切断した浮屋根５の切断片を貯槽の側マンホール１５から貯槽の外部へ搬出する場合を示す全体説明図である。
上方に屋根がある場合（図示せず）やクレーンを使用しない図１０に示す事例は、浮屋根５を所定高さ位置に支持した状態で切断した各切断片を、底板２の上に降ろして側マンホール１５から貯槽外部へ搬出している。
FIG. 10 is an overall explanatory diagram showing a case where a cut piece of the cut floating roof 5 is carried out from the side manhole 15 of the storage tank to the outside of the storage tank in another example of the conventional floating roof dismantling construction work.
In the case where there is a roof above (not shown) or the case shown in FIG. 10 where a crane is not used, each cut piece cut with the floating roof 5 supported at a predetermined height is lowered onto the bottom plate 2. It is carried out from the side manhole 15 outside the storage tank.
従来の特公昭５３−４０９７０号「浮屋根式貯槽の浮屋根組立工法」は、浮屋根を底板上で組立てたのち、上端にワイヤーのガイドローラを取付けたガイドポストを配列し浮屋根を通貫させ、浮屋根を所定高さ位置まで吊上げる組立工法である。 In Japanese Patent Publication No. 53-40970, “Floating Roof Assembly Method for Floating Roof Storage Tank”, after the floating roof is assembled on the bottom plate, a guide post with a wire guide roller attached to the upper end is arranged to penetrate the floating roof. This is an assembly method for lifting the floating roof to a predetermined height position.
従来の特開２００６−３３５３８６号公報「浮屋根式タンクのルーフ解体方法」は、ルーフ全体を水で浮かせたままで、ルーフサポートを短く切断して差替え設置し、水を抜き出し、底面板に着床し、水を残した状態でルーフを切断し撤去する方法である。 Japanese Laid-Open Patent Publication No. 2006-335386, “Roof dismantling method for floating roof type tank”, with the entire roof kept floating with water, the roof support is cut short and replaced, the water is extracted, and the bottom plate is landed Then, the roof is cut and removed with water remaining.
従来の特開２００８−１２７０８４号公報「浮屋根改造方法」は、既設の浮屋根を解体撤去して新規のシングルデッキ構造浮屋根に改造する方法であって、底板上の所定高さ位置に降下させた既設の浮屋根デッキ板上に新規浮屋根を構築した後に、下部の既設の浮屋根デッキ板を解体し移送撤去をする方法である。 The conventional "Floating roof remodeling method" disclosed in Japanese Patent Application Laid-Open No. 2008-127084 is a method of dismantling an existing floating roof and remodeling it to a new single deck structure floating roof, and descending to a predetermined height position on the bottom plate After constructing a new floating roof on the existing floating roof deck board, the existing floating roof deck board in the lower part is disassembled and transferred and removed.
従来の特許第３５１６２１５号「二重殻貯槽内槽底板の施工法とその昇降装置」は、内槽底板に貫通口を設け、ポーストを貫通させて、このポーストに設けた昇降装置によって底板を昇降する施工法である。 Conventional Patent No. 3516215 “Construction Method of Double-shell Storage Tank Bottom Plate and its Lifting Device” provides a through-hole in the bottom plate of the inner tank, penetrates the post, and lifts the bottom plate by the lifting device provided in this post. It is a construction method to do.
図９に示す従来例の浮屋根解体工事施工法でクレーン１４を使用して切断片を搬出する事例は、デッキサポート１２の他に多くの仮設の架台１３が必要となり、解体した重量部材を吊上げて高い側板を越える作業も大変であった。 In the conventional floating roof dismantling construction method shown in FIG. 9, the crane 14 is used to carry out the cut pieces. In addition to the deck support 12, many temporary mounts 13 are required, and the disassembled weight member is lifted. The work of crossing high side plates was also difficult.
また、図１０に示す従来例の浮屋根解体工事施工法で浮屋根を底板上の所定高さに保持した状態で解体作業を行い、貯槽のマンホール１５を使用して切断片を搬出する事例は、デッキサポート１２と仮設の架台１３を使用して背丈以上の高い位置に浮屋根５を保持して切断作業を行うため、高所作業となって落下の危険を伴う場合があった。また、切断した重量部材を底板２の上に降ろす作業も大変であった。 In addition, in the conventional floating roof dismantling construction method shown in FIG. 10, the dismantling work is performed with the floating roof held at a predetermined height on the bottom plate, and the cut piece is carried out using the manhole 15 of the storage tank. Since the deck support 12 and the temporary mount 13 are used to perform the cutting work while holding the floating roof 5 at a position higher than the height, there is a case where the work becomes a high place and there is a risk of falling. Moreover, the operation | work which drops the cut | disconnected weight member on the baseplate 2 was also difficult.
従来の特公昭５３−４０９７０号「浮屋根式貯槽の浮屋根組立工法」は、浮屋根を底板上で組立てたのち、上端にワイヤーのガイドローラを取付けたガイドポストを配列し浮屋根を通貫させ、浮屋根を所定高さ位置まで吊上げる工法であるが、構築法であって解体に適用することはできなかった。 In Japanese Patent Publication No. 53-40970, “Floating Roof Assembly Method for Floating Roof Storage Tank”, after the floating roof is assembled on the bottom plate, a guide post with a wire guide roller attached to the upper end is arranged to penetrate the floating roof. Although it is a method of lifting the floating roof to a predetermined height position, it was a construction method and could not be applied to dismantling.
従来の特開２００６−３３５３８６号公報「浮屋根式タンクのルーフ解体方法」は、ルーフ全体を水で浮かせ、ルーフサポートを短く切断し、水を抜き出し、底面板に着床し、水を残した状態でルーフを切断し撤去する方法であるが、大量の水を必要としその排水処理が大変であった。また、この方法ではルーフ下部の付属部材の切断撤去ができなかった。 Conventional Japanese Unexamined Patent Publication No. 2006-335386 “Roof Dismantling Method for Floating Roof Type Tank” floats the entire roof with water, cuts the roof support short, draws out water, lays on the bottom plate, and leaves the water It is a method of cutting and removing the roof in the state, but it requires a large amount of water and its wastewater treatment is difficult. Also, this method could not cut and remove the attached member at the lower part of the roof.
従来の特開２００８−１２７０８４号公報「浮屋根改造方法」は、既設の浮屋根を解体撤去して新規のシングルデッキ構造浮屋根又はダブルデッキ構造浮屋根に改造する方法であるが、既設の浮屋根デッキ板を底板上の所定高さ位置に降下させる際の施工法については何ら具体的に開示されてはいない。 Japanese Laid-Open Patent Publication No. 2008-127084 “Floating Roof Remodeling Method” is a method of dismantling and remodeling an existing floating roof to a new single deck structure floating roof or a double deck structure floating roof. There is no specific disclosure of a construction method for lowering the roof deck board to a predetermined height position on the bottom board.
従来の特許第３５１６２１５号「二重殻貯槽内槽底板の施工法とその昇降装置」は、内槽底板に貫通口を設け、ポーストを貫通させて、このポーストに設けた昇降装置によって底板を昇降する施工法であるが、浮屋根の解体施工には適用できなかった。 Conventional Patent No. 3516215 “Construction Method of Double-shell Storage Tank Bottom Plate and its Lifting Device” provides a through-hole in the bottom plate of the inner tank, penetrates the post, and lifts the bottom plate by the lifting device provided in this post. However, it was not applicable to the dismantling of floating roofs.
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、
安全性、作業性、コスト、工期、仮設機材の削減、施工性を配慮して、底板近傍の低い位置の安全作業で作業性良く浮屋根の解体撤去を行うことができるようにした浮屋根の解体工事施工法を提供するものである。
The object of the present invention has been made in view of the problems of the prior art as described above.
In consideration of safety, workability, cost, work period, reduction of temporary equipment, and workability, the floating roof can be dismantled and removed with good workability in a safe work at a low position near the bottom plate. The dismantling construction method is provided.
請求項１記載の浮屋根解体工事施工法は、浮屋根式貯槽１の底板２から浮屋根５を所定高さ位置、例えば最高位置設定のハイデッキの位置にデッキサポート１２を貫通させて固定支持し、浮屋根５の下部に設けられているルーフドレン１０、ベースヒータ１１などの付属部材を切断し、浮屋根５の上部に設けられている外周ポンツーン７、シール部材８、雨よけ板９などの付属部材を切断し、さらに細かく裁断し軽量化した切断片を浮屋根式貯槽１に設けたマンホール１５から貯槽外部へ撤去し、次に、デッキサポート１２の上端近傍に設けた降下装置１６を作動させて浮屋根５のデッキ板６の全体を一緒にデッキサポート１２に沿って降下させ、デッキサポート１２の下端近傍に設けた止め具１７まで降下させた後、浮屋根５のデッキ板６を切断解体し、マンホール１５から貯槽外部へ撤去することを特徴とする。
In the floating roof dismantling construction method according to claim 1, the floating roof 5 is fixedly supported by penetrating the deck support 12 from the bottom plate 2 of the floating roof storage tank 1 to a predetermined height position , for example, a high deck position set to the highest position. The auxiliary members such as the roof drain 10 and the base heater 11 provided at the lower part of the floating roof 5 are cut, and the auxiliary members such as the outer peripheral pontoon 7, the sealing member 8, and the rain shield 9 provided at the upper part of the floating roof 5. The cut piece that has been cut into pieces and further reduced in weight is removed from the manhole 15 provided in the floating roof storage tank 1 to the outside of the storage tank , and then the lowering device 16 provided near the upper end of the deck support 12 is operated. the entire deck plate 6 of the floating roof 5 is moved down along the deck support 12 together, after being lowered to stop 17 provided in the vicinity of the lower end of the deck support 12, the floating roof 5 deck plate 6 Cutting dismantled, characterized in that it removed from the manhole 15 to reservoir outside.
請求項２記載の浮屋根解体工事施工法は、上記請求項１記載の浮屋根５の下部及び上部に設けられている付属部材を解体撤去した後に、浮屋根５のデッキ板６を複数域に区分けし、次に、デッキサポート１２の上端近傍に設けた降下装置１６を作動させて浮屋根５のデッキ板６の区分け単位ごとにデッキサポート１２に沿ってデッキ板６を降下させ、デッキサポート１２の下端近傍に設けた止め具１７まで降下させ後、浮屋根５のデッキ板６を切断解体するようにしたものである。
The floating roof dismantling construction method according to claim 2 is a method of disassembling and removing the attachment members provided at the lower and upper parts of the floating roof 5 according to claim 1 and then making the deck plate 6 of the floating roof 5 into a plurality of areas. segment only, and then the drop device 16 provided near the upper end of the deck support 12 is actuated for each category only units of the deck plate 6 of the floating roof 5 along the deck support 12 is lowered to the deck plate 6, deck The deck plate 6 of the floating roof 5 is cut and disassembled after being lowered to the stopper 17 provided in the vicinity of the lower end of the support 12 .
請求項１記載の浮屋根解体工事施工法は、浮屋根式貯槽１の底板２から浮屋根５を所定高さ位置、例えば最高位置設定のハイデッキの位置にデッキサポート１２を貫通させて固定支持し、浮屋根５の下部に設けられているルーフドレン１０、ベースヒータ１１などの付属部材を切断し、浮屋根５の上部に設けられている外周ポンツーン７、シール部材８、雨よけ板９などの付属部材を切断し、さらに細かく裁断し軽量化した切断片を浮屋根式貯槽１に設けたマンホール１５から貯槽外部へ撤去するので、外周ポンツーン７、シール部材８、雨よけ板９は、デッキ板６の上で細かく重くないように切断するため落下などの心配がなく安全作業で降下させることができ、また、ルーフドレン１０、ベースヒータ１１は、デッキ板６の下の天井が高いハイデッキの状態で切断するため作業性が良く、マンホール１５からの搬出も安全作業で作業性良く行うことができる。
次に、デッキサポート１２の上端近傍に設けた降下装置１６を作動させて浮屋根５のデッキ板６の全体を一緒にデッキサポート１２に沿って降下させ、デッキサポート１２の下端近傍に設けた止め具１７まで降下させ、止め具１７で浮屋根５を固定するため、降下及び固定の安定性が良い。
次いで、降下させた浮屋根５のデッキ板６を底板近傍の低い位置で切断撤去するので、背丈以上の高所での切断作業がなくなるため、安全性が確保される。
また、デッキサポート１２と降下装置１６使用することにより、大掛かりな仮設の架台が要らないため、仮設機材を削減することができ、コスト低減、工期短縮となる。
In the floating roof dismantling construction method according to claim 1, the floating roof 5 is fixedly supported by penetrating the deck support 12 from the bottom plate 2 of the floating roof storage tank 1 to a predetermined height position , for example, a high deck position set to the highest position. The auxiliary members such as the roof drain 10 and the base heater 11 provided at the lower part of the floating roof 5 are cut, and the auxiliary members such as the outer peripheral pontoon 7, the sealing member 8, and the rain shield 9 provided at the upper part of the floating roof 5. Since the cut pieces that have been cut into pieces and further reduced in weight are removed from the manhole 15 provided in the floating roof type storage tank 1 to the outside of the storage tank, the outer peripheral pontoon 7, the seal member 8, and the rain shield 9 are arranged on the deck board 6. Since it is cut so that it is not heavy and heavy, it can be lowered safely without worrying about dropping, and the roof drain 10 and the base heater 11 have a high ceiling under the deck plate 6. Good workability for cutting in the state of Haidekki also unloaded from the manhole 15 can be carried out with good workability in a safe work.
Next, the descent device 16 provided near the upper end of the deck support 12 is operated to lower the entire deck plate 6 of the floating roof 5 along the deck support 12 together, and the stop provided near the lower end of the deck support 12. Since it is lowered to the tool 17 and the floating roof 5 is fixed by the stopper 17, the stability of the lowering and fixing is good.
Next, since the deck plate 6 of the lowered floating roof 5 is cut and removed at a low position near the bottom plate , cutting work at a height higher than the height is eliminated, so that safety is ensured.
In addition, by using the deck support 12 and the lowering device 16, since a large temporary mount is not required, temporary equipment can be reduced, and the cost and work period are shortened.
このように、底板２近傍の低い位置で浮屋根５のデッキ板６を切断、解体、搬出を行うため、作業性、施工性が向上し、コスト低減、工期短縮となる。
Thus, since the deck board 6 of the floating roof 5 is cut, disassembled, and carried out at a low position in the vicinity of the bottom board 2 , workability and workability are improved, resulting in cost reduction and construction time reduction.
請求項２記載の浮屋根解体工事施工法は、上記請求項１記載の浮屋根５の下部及び上部に設けられている付属部材を解体撤去した後に、浮屋根５のデッキ板６を複数域に区分けし、次に、デッキサポート１２の上端近傍に設けた降下装置１６を作動させて浮屋根５のデッキ板６の区分け単位ごとにデッキサポート１２に沿ってデッキ板６を降下させ、デッキサポート１２の下端近傍に設けた止め具１７まで降下させ後、浮屋根５のデッキ板６を切断解体するようにしたので、浮屋根５が大きく広い面積の場合には、浮屋根５を複数域に区分けすることにより、区分けごとに降下がし易くスムーズにでき、切断解体の作業も複数個所の並行作業で効率良く解体作業を行うことが出来る。
The floating roof dismantling construction method according to claim 2 is a method of disassembling and removing the attachment members provided at the lower and upper parts of the floating roof 5 according to claim 1 and then making the deck plate 6 of the floating roof 5 into a plurality of areas. segment only, and then the drop device 16 provided near the upper end of the deck support 12 is actuated for each category only units of the deck plate 6 of the floating roof 5 along the deck support 12 is lowered to the deck plate 6, deck Since the deck plate 6 of the floating roof 5 is cut and disassembled after being lowered to the stopper 17 provided in the vicinity of the lower end of the support 12, when the floating roof 5 has a large area, the floating roof 5 is divided into a plurality of areas. the by partitioning, can turn easily smoothly and is lowered for each division, cutting demolition work can also be performed efficiently dismantling in parallel work plurality of locations.
この発明に係る浮屋根解体工事施工法の実施形態を、図１乃至図７に基づいて説明する。
この実施形態例は、図８に例示したシングルデッキ構造浮屋根式貯槽を解体する事例を示すもので、図中、同一の用語には同一の番号を使用している。
なお、図示事例ではシングルデッキ構造浮屋根式貯槽について説明するが、シングルデッキ構造浮屋根式貯槽に限定されることなく、ダブルデッキ構造浮屋根式貯槽の場合や、内部浮き蓋付き貯槽の浮屋根の解体工事にも適用することができることは言うまでもない。
１は浮屋根式貯槽、２は円形平板の底板、３は円筒体形状の側板、５はシングルデッキ構造の浮屋根、６はデッキ板である。7は環状箱体の外周ポンツーン、８は外周ポンツーン７と側板３内面との間隙を気密に保持するシール装置、９は雨よけ板である。１０は浮屋根５のデッキ板６の中心から貯槽の外部へ至るルーフドレン、１１は必要に応じて設けられるベースヒータである。
An embodiment of a floating roof dismantling construction method according to the present invention will be described with reference to FIGS. 1 to 7.
This embodiment shows an example of dismantling the single-deck structure floating roof storage tank illustrated in FIG. 8, and the same number is used for the same term in the figure.
In the illustrated example, a single-deck floating roof storage tank will be described. However, it is not limited to a single-deck floating roof storage tank, but in the case of a double-deck floating roof storage tank or a floating roof of a storage tank with an internal floating lid. Needless to say, it can be applied to the dismantling work.
Reference numeral 1 denotes a floating roof type storage tank, 2 a circular flat bottom plate, 3 a cylindrical side plate, 5 a single deck floating roof, and 6 a deck plate. 7 is an outer peripheral pontoon of the annular box, 8 is a sealing device that keeps the gap between the outer peripheral pontoon 7 and the inner surface of the side plate 3 airtight, and 9 is a rain shield. 10 is a roof drain extending from the center of the deck plate 6 of the floating roof 5 to the outside of the storage tank, and 11 is a base heater provided as necessary.
図１は、この発明に係る浮屋根解体工事施工法の浮屋根を所定位置に固定して、浮屋根の上下の付属部材を解体撤去する状況を示す側面全体説明図である。
図のようにデッキサポート１２を用いて浮屋根５を所定高さ位置、例えば最高位置設定のハイデッキの位置に固定し、Ａに示すようにデッキ板６の上に設けられている外周ポンツーン７、シール部材８、雨よけ板９などの付属部材を切断し、Ｂに示すようにデッキ板６の下に設けられているルーフドレン１０、ベースヒータ１１などの付属部材を切断し、さらに細かく裁断し軽量化した切断片をマンホール１５から貯槽外部へ撤去する。
なお図示はしないが、内部浮き蓋付き貯槽の場合は、ルーフドレンなどの浮屋根下部の付属部材がない場合がある。
FIG. 1 is an overall side view illustrating a situation where the floating roof of the floating roof dismantling construction method according to the present invention is fixed at a predetermined position and the upper and lower attachment members of the floating roof are dismantled and removed.
As shown in the figure, the deck support 12 is used to fix the floating roof 5 to a predetermined height position, for example, the position of the high deck set at the highest position, and as shown in A, the outer peripheral pontoon 7 provided on the deck board 6; Cut the attached members such as the seal member 8 and the rain shield plate 9 and cut the attached members such as the roof drain 10 and the base heater 11 provided below the deck plate 6 as shown in B, and further cut to reduce the weight. The cut piece is removed from the manhole 15 to the outside of the storage tank.
Although not shown, in the case of a storage tank with an internal floating lid, there may be no attached member at the lower part of the floating roof such as a roof drain.
この場合、Ａに示す外周ポンツーン７、シール部材８、雨よけ板９は、デッキ板６の上で細かく重くないように切断するため落下などの心配がなく安全作業で降下させることができる。また、Ｂに示すルーフドレン１０、ベースヒータ１１はデッキ板６の下の天井が高いハイデッキの状態で切断するため作業性が良く、マンホール１５からの搬出も安全作業で作業性良く行うことができる。
なお、浮屋根５が小さい場合や、外周ポンツーン７などの付属部材の重量が小さい場合には、上記Ａに示す浮屋根上部の付属部材は切断解体することなくそのままにして浮屋根５を降下させるようにしてもよい。
また、内部浮き蓋付き貯槽などでルーフドレン１０などの浮屋根下部の付属部材がない場合には、上記Ｂに示す浮屋根下部の付属部材の解体撤去はなくそのまま降下させる。
In this case, the outer peripheral pontoon 7, the seal member 8, and the rain shield 9 shown in A are cut so as not to be fine and heavy on the deck plate 6, so that they can be lowered by a safe operation without fear of dropping. Further, the roof drain 10 and the base heater 11 shown in B are cut in a high deck state in which the ceiling under the deck plate 6 is high, so that workability is good, and unloading from the manhole 15 can be performed safely and with good workability.
In addition, when the floating roof 5 is small, or when the weight of the attached members such as the outer peripheral pontoon 7 is small, the attached member at the upper part of the floating roof shown in the above A is dropped without being cut and disassembled. You may do it.
Further, when there is no attached member at the lower part of the floating roof such as the roof drain 10 in a storage tank with an internal floating lid or the like, the attached member at the lower part of the floating roof shown in the above B is not dismantled and is lowered as it is.
図２は浮屋根５を解体する状況を示す平面説明図で、図１に示すように浮屋根５の上下付属部材を解体撤去した後、浮屋根を複数域に区分けした状況を示す平面説明図である。
複数のデッキサポート１２によって平均に支持される浮屋根５のデッキ板６は、図４に示すように全体を一緒に降下してもよいが、例えば図中二点鎖線でａ〜ｅに示すように複数域に区分けし、図５に示すように区分け部ごとに降下してもよい。
FIG. 2 is an explanatory plan view showing a situation where the floating roof 5 is dismantled. FIG. 2 is an explanatory plan view showing a situation where the floating roof 5 is divided into a plurality of areas after the upper and lower attachment members of the floating roof 5 are dismantled and removed as shown in FIG. It is.
The deck plates 6 of the floating roof 5 that are supported on average by a plurality of deck supports 12 may be lowered together as shown in FIG. 4, for example, as indicated by a to d in FIG. It may be divided into a plurality of areas, and may be lowered for each section as shown in FIG.
浮屋根５が小さい場合は全体を一緒に降下するが、浮屋根５が大きく広い面積の場合には、浮屋根５を複数域に区分けすることにより降下がスムーズにでき、切断解体の作業も並行して出来るため効率化が図られる。 When the floating roof 5 is small, the whole is lowered together. However, when the floating roof 5 is large and has a large area, the floating roof 5 is divided into a plurality of areas so that the descent can be smoothly performed, and cutting and demolition work is performed in parallel. As a result, efficiency can be improved.
図３は、この発明に係る浮屋根解体工事施工法の状況を示す全体説明図で、デッキサポート１２の上端近傍位置に降下装置１６を取付け、下端近傍位置に止め具１７を設ける。
降下装置１６は、チェーンブロックやチルホール（商標）などの簡便な荷重支持の吊り装置を採用する。
FIG. 3 is an overall explanatory view showing the state of the floating roof dismantling construction method according to the present invention. A descent device 16 is attached to a position near the upper end of the deck support 12, and a stopper 17 is provided near the lower end.
The descent device 16 employs a simple load-supporting suspension device such as a chain block or chill hole (trademark).
図４は、この発明に係る浮屋根解体工事施工法の事例で、デッキサポート１２に沿わせて浮屋根全体を一緒に降下させる状況を示す全体説明図である。
降下装置１６を使用してデッキサポート１２に沿わせて浮屋根５のデッキ板６全体を平均に降下させ、底板２の近傍位置の止め具１７でデッキ板６を固定し、高さが低い位置の安全作業で切断解体を行う。
FIG. 4 is an example of the floating roof dismantling construction method according to the present invention, and is an overall explanatory view showing a situation where the entire floating roof is lowered together with the deck support 12.
Lowering the entire deck board 6 of the floating roof 5 on the average along the deck support 12 using the lowering device 16, fixing the deck board 6 with the stopper 17 in the vicinity of the bottom board 2, and the position where the height is low Cutting and dismantling with safe work.
図５は、この発明に係る浮屋根解体工事施工法の他の事例で、デッキサポートに沿わせて浮屋根の区分け部を降下させる状況を示す全体説明図である。
デッキサポート１２の上下近傍に降下装置１６、止め具１７を設け、前記図２のａ〜ｅ のように複数域に区分して降下を行う。
FIG. 5 is an overall explanatory view showing a situation where the floating roof section is lowered along the deck support in another example of the floating roof dismantling construction method according to the present invention.
A descent device 16 and a stopper 17 are provided in the vicinity of the top and bottom of the deck support 12, and the descent is performed by dividing into a plurality of areas as shown in FIGS.
このように、浮屋根５が大きく広い面積の場合には、浮屋根５を複数域に区分けすることにより降下がスムーズにでき、切断解体の作業も複数個所で並行して出来るため効率化が図られる。 As described above, when the floating roof 5 is large and has a large area, the floating roof 5 can be smoothly lowered by dividing the floating roof 5 into a plurality of areas, and the cutting and disassembling work can be performed in parallel at a plurality of locations. It is done.
図６は、この発明に係る浮屋根解体工事施工法に使用するデッキサポートの上下各近傍に降下装置１６、止め具１７を設けた事例を示す説明図である。
スリーブ１８は円筒管状で、デッキ板６を貫通しデッキ板６上部のブラケット１９Ａで固定され、デッキサポート１２はこのスリーブ１８管内を貫通し底板２上のベースプレート２０上に着地している。デッキサポート１２の上端の把持部とスリーブ１８のブラケット１９Ａとの間にわたって降下装置１６を取付け、デッキサポート１２の下端近傍位置に止め具１７を溶着などによって固定する。
降下装置１６は、複数平均に配置されているデッキサポート１２に取付け荷重を支持するため、チェーンブロックやチルホール（商標）などの簡便な吊り装置を使用することができる。
FIG. 6 is an explanatory view showing an example in which a lowering device 16 and a stopper 17 are provided in the vicinity of the upper and lower sides of the deck support used in the floating roof dismantling construction method according to the present invention.
The sleeve 18 is cylindrical and penetrates the deck plate 6 and is fixed by a bracket 19A at the top of the deck plate 6. The deck support 12 penetrates through the sleeve 18 and lands on the base plate 20 on the bottom plate 2. The lowering device 16 is attached between the grip portion at the upper end of the deck support 12 and the bracket 19A of the sleeve 18, and the stopper 17 is fixed to the position near the lower end of the deck support 12 by welding or the like.
Since the descent device 16 supports the mounting load on the deck supports 12 arranged in a plurality of averages, a simple suspension device such as a chain block or a chill hole (trademark) can be used.
図７は、この発明に係る浮屋根解体工事施工法に使用するデッキサポートの上下各近傍に降下装置１６、止め具１７を設けた他の事例を示す説明図である。
スリーブ１８は円筒管状で、デッキ板６を貫通しデッキ板６下部のブラケット１９Ｂで固定され、デッキサポート１２はこのスリーブ１８管内を貫通し底板２上のベースプレート２０上に着地している。デッキサポート１２の上端の把持部とデッキ板６上の固定部材２１Ａ，２１Ａとの間に降下装置１６Ａ，１６Ａを取付け、デッキサポート１２の下端近傍位置に止め具１７Ａ，１７Ａを設ける。
このように、降下装置１６Ａ，１６Ａの下端は固定部材２１Ａ，２１Ａに取付けて平均に吊って荷重負担の安定化を図ることができる。
また、止め具１７Ａ，１７Ａは高さが低い受け台状に形成し、デッキサポート１２の周囲に、例えば放射状に配置して荷重を平均に支持させる。この止め具１７Ａ，１７Ａは、デッキサポート１２に直接溶着固定することなく、予め作っておいて据付けることができるため、現場での作業を減らし現場工程の短縮を図ることができる。
FIG. 7 is an explanatory view showing another example in which the lowering device 16 and the stopper 17 are provided in the vicinity of the upper and lower sides of the deck support used in the floating roof dismantling construction method according to the present invention.
The sleeve 18 is cylindrical and penetrates the deck plate 6 and is fixed by a bracket 19B below the deck plate 6. The deck support 12 penetrates through the sleeve 18 and lands on the base plate 20 on the bottom plate 2. The lowering devices 16A and 16A are attached between the grip portion at the upper end of the deck support 12 and the fixing members 21A and 21A on the deck plate 6, and the stoppers 17A and 17A are provided near the lower end of the deck support 12.
In this way, the lower ends of the lowering devices 16A and 16A can be attached to the fixing members 21A and 21A and hung on the average to stabilize the load burden.
Further, the stoppers 17A, 17A are formed in a pedestal shape having a low height, and are arranged radially around the deck support 12, for example, to support an average load. Since these stoppers 17A and 17A can be made and installed in advance without being directly welded and fixed to the deck support 12, the work at the site can be reduced and the site process can be shortened.
上記のように、浮屋根５を所定の位置にデッキサポート１２で固定支持し、このデッキ板６の上で浮屋根上部の外周ポンツーン７及びシール部材８を切断し、浮屋根下部のルーフドレン１０などの付属部材を切断するので、浮屋根上下の切断作業は、ともに安全作業で効率良く行うことができる。
次いで、デッキサポート１２に沿わせて浮屋根５を降下させ、止め具１７で浮屋根５を固定するため、降下及び固定の安定性が良い。
降下させた浮屋根５のデッキ板６を底板近傍の低い位置で切断撤去するので、背丈以上の高所での切断作業がなくなるため、安全性が確保される。
このように、底板近傍の低い位置で浮屋根５のデッキ板６を切断、解体、搬出を行うため、作業性、施工性が向上する。
また、デッキサポート１２と降下装置１６使用することにより、大掛かりな仮設の架台が要らないため、仮設機材を削減することができ、コスト低減、工期短縮となる。
As described above, the floating roof 5 is fixedly supported at a predetermined position by the deck support 12, and the outer peripheral pontoon 7 and the seal member 8 at the upper part of the floating roof are cut on the deck plate 6, and the roof drain 10 at the lower part of the floating roof, etc. Since the attachment members are cut, the cutting work on the upper and lower sides of the floating roof can be performed safely and efficiently.
Next, since the floating roof 5 is lowered along the deck support 12 and the floating roof 5 is fixed by the stopper 17, the stability of the lowering and fixing is good.
Since the deck plate 6 of the lowered floating roof 5 is cut and removed at a low position near the bottom plate, the cutting work at a height higher than the height is eliminated, so that safety is ensured.
Thus, since the deck board 6 of the floating roof 5 is cut, disassembled and carried out at a low position near the bottom board, workability and workability are improved.
In addition, by using the deck support 12 and the lowering device 16, since a large temporary mount is not required, temporary equipment can be reduced, and the cost and work period are shortened.
この発明に係る浮屋根解体工事施工法は、シングルデッキ構造やダブルデッキ構造の浮屋根の取替えや修復などの工事施工、シングルデッキ構造の浮屋根をダブルデッキ構造の浮屋根への改造、内部浮き蓋付き貯槽、つまりドーム屋根やコーンルーフ屋根付き浮屋根の耐震性を向上するための改造に適用することができる。
The floating roof dismantling construction method according to the present invention includes construction work such as replacement and repair of floating roofs of single deck structure or double deck structure, modification of floating roofs of single deck structure to floating roofs of double deck structure, internal floating It can be applied to modifications to improve the seismic resistance of storage tanks with lids, that is, floating roofs with dome roofs and cone roofs.
１ 浮屋根式貯槽
２ 底板
３ 側板
４ 貯蔵液
５ 浮屋根
６ デッキ板
７ 外周ポンツーン
８ シール装置
９ 雨よけ板
１０ ルーフドレン
１１ ベースヒータ
１２ デッキサポート
１３ 架台
１４ クレーン
１５ マンホール
１６、１６Ａ 降下装置
１７、１７Ａ 止め具
１８ スリーブ管
１９、１９Ａ、１９Ｂ ブラッケット
２０ ベースプレート
２１、２１Ａ 固定部
1 Floating roof storage tank
2 Bottom plate
3 Side plate
4 Stock solution
5 Floating roof
6 deck boards
7 peripheral pontoon
8 Sealing device
9 Rain guard
10 Roof drain
11 Base heater
12 deck support
13 frame
14 crane
15 Manhole
16, 16A Descent device
17, 17A Stopper
18 Sleeve tube
19, 19A, 19B Bracket
20 Base plate
21, 21A fixed part
Claims (2)
After dismantled the accessory member provided on the lower and upper portion of the floating roof 5, the deck plate 6 of the floating roof 5 is divided only into a plurality ranges, then drop device provided near the upper end of the deck support 12 16 lowers the deck plate 6 along the deck support 12 is operated for each category only units of the deck plate 6 of the floating roof 5 and, after allowed to drop to stop 17 provided in the vicinity of the lower end of the deck support 12, the floating roof 5. The floating roof dismantling construction method according to claim 1 , wherein the deck plate 6 of 5 is cut and disassembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009111354A JP5510863B2 (en) | 2009-04-30 | 2009-04-30 | Floating roof dismantling construction method for floating roof storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009111354A JP5510863B2 (en) | 2009-04-30 | 2009-04-30 | Floating roof dismantling construction method for floating roof storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2010260582A JP2010260582A (en) | 2010-11-18 |
| JP5510863B2 true JP5510863B2 (en) | 2014-06-04 |
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| JP2009111354A Active JP5510863B2 (en) | 2009-04-30 | 2009-04-30 | Floating roof dismantling construction method for floating roof storage tank |
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| JPS6055392B2 (en) * | 1978-04-20 | 1985-12-04 | 川崎重工業株式会社 | Floating roof construction method and equipment for floating roof tanks |
| JPH068146B2 (en) * | 1989-02-08 | 1994-02-02 | 東京瓦斯株式会社 | Floating roof dismantling method for floating roof tank |
| JP3757509B2 (en) * | 1996-12-25 | 2006-03-22 | 株式会社石井鐵工所 | Construction method of water-containing gas holder |
| JP2006335386A (en) * | 2005-05-31 | 2006-12-14 | Kyuseki Engineering Kk | Roof demolition method of floating roof type tank |
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