JP3757509B2

JP3757509B2 - Construction method of water-containing gas holder

Info

Publication number: JP3757509B2
Application number: JP35576396A
Authority: JP
Inventors: 宏治石井; 宗彦中村
Original assignee: 株式会社石井鐵工所
Priority date: 1996-12-25
Filing date: 1996-12-25
Publication date: 2006-03-22
Anticipated expiration: 2016-12-25
Also published as: JPH10184037A

Description

【０００１】
【発明の属する技術分野】
この発明は、水槽内にガスを封入して浮かぶガス槽の上下動を案内する複数の基柱が水槽の側壁外周に固定支持、又は水槽の外側地面の基礎に固定支持して設けられている有水式ガスホルダーの、基柱を含む架構を解体又は組立てる有水式ガスホルダーの工法に関するものである。
【０００２】
【従来の技術】
有水式ガスホルダー１の一般例を図７に基づいて説明する。有水式ガスホルダー１は、円盤状の底壁６と円筒状の側壁５とからなる水槽２に水封用の水を溜め、この水槽２内に単数、又は少なくとも内外槽を備えた複数槽（図示例は内外槽と中槽よりなる３槽の複数槽）の有頂円筒形のガス槽３を浮かべて形成され、この水封されたガス槽３内にガス出入管１５を連通しガスの供給と排出が行われる。図７の有水式ガスホルダー１は、ガス槽３が最内部の内槽３Ａ，中間部の中槽３Ｂ，最外部の外槽３Ｃの３槽からなり、その各ガス槽間はシール水を封入したシール部（図示省略）で接続された比較的大形の有水式ガスホルダー１の場合である。
【０００３】
有水式ガスホルダー１には、水槽２の側壁５から所定間隔をおいた外側の周囲に隔接して複数の基柱４が設けられている。図７に示す一般例は、各基柱４の下部を水槽２の側壁５周囲に複数の基柱支持サポート、つまり基柱取付部９で固定支持されている場合を示している。この他に各基柱４の固定支持方法として地面の基礎に直接固定する場合もある。基柱４は、Ｉ形鋼やＨ形鋼等の断面Ｈ形状の部材等で一定間隔を置いて立設され、この基柱４を支持枠にして全体周囲に、ガスの供給と排出によって上下動するガス槽３を支える架構１４が形成されている。この架構１４は、全体が所定強度と所定間隔で全体形状を維持するように、水平状及び斜交するアングル部材、チャンネル部材等よりなるブレーシング１１やガーダー１２などの補強材を基柱４間に張設接続して形成されている。
【０００４】
また水槽２の上部周囲、及び上昇したガス槽３各槽の境界部に位置する周囲の基柱４間に、チャンネル材やアングル材等の型鋼材、及び鋼板材などで形成された水槽歩廊１０、ガス槽歩廊１３及び昇降用階段（図示省略）等の架構が架設されている。またガス槽３の上下動を円滑にするために、各槽のガス槽３の下端部にはガス槽３及び水槽２の内壁に設けたガイド（図示せず）に接する下部ローラー７が設けられており、かつ各槽のガス槽３の上端部には放射状にガイドアームを張り出しその先端位置に基柱４と接触し案内する上部ローラー８が設けられている。
【０００５】
【発明が解決しようとする課題】
このような図７に示す有水式ガスホルダー１は、長期間使用され老朽化などして解体する必要が生じた場合、ガス槽３と水槽２の解体は、ガスを排出しガス槽３を水槽２内に降下させ水槽２の水を抜いた後に、水槽２内の空間及び水槽２周囲の低所で安全に解体作業ができた。しかしながら、水槽２とガス槽３の周囲の基柱４を含む架構１４の解体作業は、架構１４が大きくて高い構築物であるために、解体作業が大掛かりでかつ危険を伴う大変な作業となった。つまり、水槽２の外側周囲に高く立設されている架構１４の内外周囲に沿って全体に高く大きい仮設足場等を構築し、その仮設足場に作業員が乗って、順次上部から下部に向かって架構１４の大規模な解体作業が進められていた。
【０００６】
上述のような高所仮設足場や大形重機等を使用する従来の有水式ガスホルダーの解体工法は、水槽２の側壁５から所定間隔をおいた外側の周囲に隔接して立設された高く大きな基柱４を含む架構１４を上部から下部に向かって順次切断し解体作業をするために、大掛かりでかつ高所での危険な作業であった。また、高く大きく仮設された解体作業用の足場の周囲全体に落下防止用安全ネット等を張りめぐらすなど、高所作業用の安全対策が必要であった。また、高所作業に適する熟練した多数の作業員を必要とした。また、高い場所で火気を使用し切断作業をするため、火花や溶断片が周辺に飛散したり落下するのを防止するための対策、つまり周囲に高い防炎シートや防護壁等の火気養生などの大掛かりな防護対策を必要とした。さらにまた、周囲に他の設備や構築物等が接近している場合には、他の設備や構築物等へ火花等が飛散したり解体物等が接触などしないように配慮し、それらの防護対策が必要となった。
【０００７】
また、解体した基柱４、ブレーシング１１、ガーダー１２、ガス槽歩廊１３等よりなる基柱４を含む架構１４の重量物を、降下可能な大きさに切断し高い場所から吊りながら降ろすために、大型レッカー、大型クレーン及び吊り装置等の大形の重機が必要で、これらの大形重機を稼働させるための広い作業場所と移動用の広い通路を必要とした。また、周囲に既設構築物等が接近しているような狭い場所では、作業規模の制約などが生じ作業能率が低下し、解体作業も困難であった。
【０００８】
また、図７に示す有水式ガスホルダー１を新規に組立て構築する場合にも、上記解体する場合と同様に、ガス槽３と水槽２の組立ては、水槽２内の空間及び水槽２周囲の低所で安全に組立作業ができた。しかしながら、水槽２とガス槽３の周囲の基柱４を含む架構１４の組立作業は、架構１４が大きくて高い構築物であるために、組立作業が大掛かりでかつ危険を伴う大変な作業となった。つまり、水槽２の外側周囲に沿って全体に高く大きい仮設足場等を構築し、その仮設足場に作業員が乗って、順次下部から上部に向かって基柱４を含む架構１４の大規模な組立作業が進められていた。
【０００９】
上述のような高所仮設足場等を使用する従来の有水式ガスホルダーの組立工法は、水槽２の側壁５から所定間隔をおいた外側の周囲に隔接して高く大きな基柱４を含む架構１４を下部から上部に向かって順次組立作業をするために、大掛かりでかつ高所での危険な作業であった。つまり、高く大きく仮設された組立作業用の足場の周囲全体に落下防止用安全ネット等を張りめぐらすなど、高所作業用の安全対策が必要であった。また、高所作業に適する熟練した多数の作業員を必要とした。
【００１０】
また、架構１４を構成する基柱４、ブレーシング１１、ガーダー１２、ガス槽歩廊１３等をそれぞれ幾つかの枠組み単位に形成した重量物を、高い場所まで吊り上げるために、大型レッカー、大型クレーン及び吊り装置等の大形の重機が必要であり、これらの大形重機を稼働させるための広い作業場所と移動用の広い通路を必要とした。また、周囲に既設構築物等が接近しているような狭い場所では、作業能率が低下し、組立作業も困難であった。
【００１１】
この発明は、従来技術の有する上述の問題点に鑑みてなされたもので、大掛かりで高い仮設足場を必要とすることなく、危険を伴う高所での作業がなく、火花等落下物の大掛かりで高い防護対策を必要とすることもなく、また大形の重機等を必要とすることなく、広い作業場所や移動通路を必要とすることもなく、かつ安全で作業能率が良く経済性の高い、有水式ガスホルダーの解体及び組立ての工法を提供するものである。
【００１２】
【課題を解決するための手段】
この発明の有水式ガスホルダーの工法は、有水式ガスホルダーの基柱を空気圧を受けたガス槽で支持した状態で、基柱を含む架構を解体又は組立てるものである。
【００１３】
また、この発明による有水式ガスホルダーの解体工法は、基柱の降下を垂直に案内する複数の基柱ガイドを水槽の側壁の上下方向に所定間隔をおいて設け、ガス槽の上部と接続するエアーリフト用部材を基柱の最上部に取付け、ガス槽のガス出入管からガス槽へ空気を送ってガス槽を最上部まで上昇させ上記エアーリフト用部材にガス槽の上部を接続して基柱にかかる荷重を保持し、この基柱を保持した状態で水槽側壁周囲に固定した基柱取付部を切断除去して基柱にかかる荷重を支持し、上記ガス槽で基柱を支持した状態で上記基柱ガイドより下方に位置する所定高さ分の基柱を地面上にて降下可能に切断除去するとともに水槽の歩廊上にてこの所定高さ分のブレーシング等の基柱に接続した架構を切断除去する工程と、ガス槽の空気を抜いて上記所定高さの切断除去分だけ上記基柱ガイドに案内させて基柱を降下させる工程とを設け、上記ガス槽で基柱を支持した状態で所定高さ分の下部基柱等を切断除去する工程とガス槽の空気排出で基柱等を降下する工程を順次繰り返しながら基柱を含む架構を下部から解体するものである。
【００１４】
また、この発明による有水式ガスホルダーの組立工法は、基柱の上昇を垂直に案内する複数の基柱ガイドを上記水槽の側壁の上下方向に所定間隔をおいて設け、この基柱ガイドに案内させて基柱を地面又は水槽側壁から水槽の歩廊上の所定高さ位置まで立設し、この基柱に上部のガーダー及びブレーシング等の基柱に接続する架構を水槽の歩廊上にて組立て、この基柱最上部にガス槽の上部と接続するエアーリフト用部材を取付け、ガス槽のガス出入管からガス槽へ空気を送ってガス槽を上昇させ上記エアーリフト用部材に接続し基柱にかかる荷重を支持してガス槽と共に基柱を所定高さ分だけ上記基柱ガイドに案内させて上昇させる工程と、上記基柱をガス槽で支持した状態で上記上昇させた所定高さ分だけ上記基柱ガイドより下部に基柱を地面上にて組立て接続するとともに水槽歩廊上にて所定高さ分のブレーシング等の基柱に接続する架構を組立て接続する工程とを設け、上記ガス槽への空気の供給で基柱を支持し所定高さ分上昇させる工程とこのガス槽による支持状態で上昇分の下部基柱等を組立て接続する工程を順次繰り返しながら基柱を含む架構を上部から組立てるものである。
【００１５】
また、この発明による有水式ガスホルダーの解体工法は、少なくとも内外槽を備えた複数のガス槽を有する有水式ガスホルダーを解体する工法において、基柱の降下を垂直に案内する複数の基柱ガイドを上記水槽の側壁の上下方向に所定間隔をおいて設け、上記ガス槽の内槽上部と接続するエアーリフト用部材を基柱の所定高さ位置、つまり内槽の最上昇時の位置に取付け、ガス槽のガス出入管から内槽へ空気を送って内槽を最上昇位置まで上昇させ上記エアーリフト用部材に接続して基柱にかかる荷重を保持し、この基柱を保持した状態で水槽側壁周囲に固定した基柱取付部を切断除去して基柱にかかる荷重を支持し、上記内槽で基柱を支持した状態で上記基柱ガイドより下方に位置する所定高さ分の基柱を降下可能に地面上にて切断除去するとともに水槽の歩廊上にてこの所定高さ分のブレーシング等の基柱に接続した架構を切断除去する工程と、内槽の空気を抜いて上記切断除去分だけ上記基柱ガイドに案内させて基柱を降下させる工程と、上記基柱下端を地面又は水槽側壁に支持した状態で再び上記エアーリフト用部材を基柱の所定高さ位置まで移設する工程とを設け、上記内槽への空気の供給で基柱を支持した状態で所定高さ分の下部基柱等を切断除去する工程と内槽の空気排出で基柱を降下させる工程とこの地面又は水槽側壁に支持状態でエアーリフト用部材を移設する工程を順次繰り返しながら基柱を含む架構を下部から解体するものである。
【００１６】
また、この発明による有水式ガスホルダーの組立工法は、少なくとも内外槽を備えた複数のガス槽を有する有水式ガスホルダーを組立てる工法において、基柱の上昇を垂直に案内する複数の基柱ガイドを上記水槽の側壁の上下方向に所定間隔をおいて設け、この基柱ガイドに案内させて基柱を地面又は水槽側壁から水槽の歩廊上の所定高さ位置まで立設し、この基柱に上部のガーダー、ブレーシング等の基柱に接続する架構を水槽の歩廊上にて組立て接続し、この基柱の所定高さ位置、つまりガス槽の内槽の最上昇時の位置にエアーリフト用部材を取付け、ガス槽のガス出入管から内槽へ空気を送って内槽を最上昇位置まで上昇させ上記エアーリフト用部材に接続し基柱にかかる荷重を支持して内槽と共に基柱を所定高さ分だけ上記基柱ガイドに案内させて上昇させる工程と、上記基柱を支持した状態で上記基柱ガイドより下部に基柱を地面上にて組立て接続するとともに水槽の歩廊上にてブレーシング等の基柱に接続する架構を組立て接続する工程と、内槽の空気を抜いて上記基柱下端を地面又は水槽側壁に支持した状態で再び上記エアーリフト用部材を基柱の所定高さ位置まで移設する工程とを設け、上記内槽への空気の供給で基柱を支持し所定高さ分上昇させる工程とこの支持状態で上昇分の下部基柱等を組立て接続する工程と内槽の空気の排出で基柱下端を地面又は水槽側壁で支持した状態でエアーリフト用部材を移設する工程を順次繰り返しながら基柱を含む架構を上部から組立てるものである。
【００１７】
【発明の実施の形態】
図１乃至図６に基づいて、この発明に係る有水式ガスホルダーの解体工法と組立工法について説明する。
【００１８】
図１乃至図３は有水式ガスホルダー１の基柱４を含む架構１４を順次解体する手順を示している。なおこの有水式ガスホルダー１は、ガス槽３が１つの単槽の事例を示しているが、ガス槽３が少なくとも内外槽を備えた複数槽の場合にも以下詳述する単槽の手順と同様の手順で行う。基柱４を含む架構１４を解体するに当たり、各基柱４が傾くことなく降下を垂直に案内するように、基柱４に沿わせ上下方向に所定間隔をおいて複数の基柱ガイド１６を水槽２の側壁５に設ける。また、基柱４にかかる荷重、つまり基柱４、ブレーシング１１、ガーダー１２、ガス槽歩廊１３等よりなる架構１４の重量を支持するようにガス槽３上部と係合又は結合等で接続するエアーリフト用部材１７を設ける。なお、図のエアーリフト用部材１７は、ガス槽３の上部ローラー８が当接するように、基柱４の最上部でガーダー１２の近傍に取付けた場合を示す。
【００１９】
上述のように、基柱ガイド１６及びエアーリフト用部材１７を取付けた後、図１に示すように、ガス槽３のガス出入管１５を利用してガス槽３内へ、エアーリフト用に設置した送風機又はブロアー等の送気設備（図示せず）を使用して、空気を送って空気圧でガス槽３を最上部まで上昇させ、上記エアーリフト用部材１７に上部ローラー８を当接し基柱４にかかる荷重を保持する。このようにガス槽３で基柱４を保持した状態で、水槽２側壁５周囲に固定した基柱支持サポート、つまり基柱取付部又は地面の基礎との取合部（図示せず）を切断除去する。また、ガス槽３の空気圧を受けて基柱４を支持した状態で上記基柱ガイド１６より下方に位置する所定高さ分の基柱４Ａ（図の斜線マーキング部）を地面上にて降下可能に切断除去する。また同時に、水槽２の歩廊１０上にてこの所定高さ分、例えば手の届く程度の高さ範囲のブレーシング１１Ａ等の基柱４に接続した架構１４（図の斜線マーキング部）を切断除去する。
【００２０】
続いて、図２に示すように、ガス槽３の空気を抜いて上記所定高さの切断除去分だけ上記基柱ガイド１６に案内させて基柱４を降下させる。図２に示す状態で、再び基柱ガイド１６より下方に位置する所定高さ分の基柱４Ｂ（図の斜線マーキング部）を地面上にて降下可能に切断除去するとともに、水槽２の歩廊１０上にて所定高さ分のブレーシング１１Ｂ等の基柱４に接続した架構１４（図の斜線マーキング部）を切断除去する。
【００２１】
さらに続いて、図３に示すように、再びガス槽３の空気を抜いて上記所定高さの切断除去分だけ上記基柱ガイド１６に案内させて基柱４を降下させる。図３に示す状態で、再び基柱ガイド１６より下方に位置する所定高さ分の基柱４Ｃ（図の斜線マーキング部）を地面上にて降下可能に切断除去するとともに、水槽２の歩廊１０上にてブレーシング１１Ｃ等の基柱４に接続した架構１４（図の斜線マーキング部）を切断除去する。このように、空気圧を受けたガス槽３で基柱４を支持した状態で、地面上と水槽２の歩廊１０上にて、切断除去と降下の工程を順次繰り返して、基柱４を含む架構１４を下部から解体撤去する。
【００２２】
また、有水式ガスホルダー１の基柱４等を組み立てる際には、上述の解体工法の手順とは全く逆に、図３から図１に至る手順に従って施工する。つまり、基柱４、ブレーシング１１、ガーダー１２等よりなる基柱４を含む架構１４を組み立てるに当たり、各基柱４が傾くことなく上昇を垂直に案内するように、基柱４に沿わせ上下方向に所定間隔をおいて複数の基柱ガイド１６を水槽２の側壁５に設ける。次に、地面上で基柱４を組立て、水槽２の歩廊１０上にて、ブレーシング１１、ガーダー１２等の基柱４に接続する架構１４の上方部分を組み立てる。続いて、ガス槽３の上部ローラー８が当接するように、基柱４の最上部でガーダー１２の近傍位置にエアーリフト用部材１７を取付ける。
【００２３】
続いて、図３に示すように、ガス槽３のガス出入管１５からガス槽３内へ空気を送って空気圧でガス槽３を上昇させ、上記エアーリフト用部材１７に上部ローラー８を当接して、基柱４を基柱ガイド１６に沿って上昇させ、所定高さ位置、例えば手の届く高さで基柱４にかかる荷重を保持する。このようにガス槽３で基柱４を保持した図３の状態で、基柱ガイド１６より下方に位置する所定高さ分の基柱４Ｃを地面上にて組立て接続するとともに、水槽２の歩廊１０上にて上記所定高さ範囲のブレーシング１１Ｃ等の基柱４に接続する架構１４を組立て接続する。
【００２４】
さらに続いて、図２乃至図１に示すように、ガス槽３に空気を供給して基柱４を支持し、順次所定高さ分だけ上記基柱ガイド１６に案内させて基柱４を上昇させる。図２乃至図１に示す状態で、再び基柱ガイド１６より下方に位置する所定高さ分の基柱４Ｂ，４Ａを地面上にて順次組立て接続するとともに、水槽２の歩廊１０上にて所定高さ分のブレーシング１１Ｂ，１１Ａ等の基柱４に接続する架構１４を順次組立て接続する。このように、基柱４を空気圧を受けたガス槽３で支持した状態で、地面上と水槽２の歩廊１０上にて、基柱４及び基柱４に接続するブレーシング１１等の架構１４の組立て接続と上昇を繰り替えし、最後に、基柱４の下部を水槽２側壁５周囲の基柱支持サポート、つまり基柱取付部又は地面の基礎部（図示せず）で固定し基柱４を含む架構１４全体を構築する。
【００２５】
エアーリフト用部材１７の事例を図４に基づいて説明する。エアーリフト用部材１７は、チャンネル材やアングル材等を用いてブラケット状に形成し、基柱４内面側のフランジ面に固着し、基柱４をガス槽３、つまりガス槽の内槽３Ａの上部に接続し、基柱４にかかる荷重を伝達するように形成する。図４の事例では、エアーリフト用部材１７は、ガス槽の内槽３Ａに上部ローラー８、つまり最上部ローラー８Ａを介して係合し接続するように形成した場合を示した。また、基柱４と内槽３Ａ上部を接続するその他の接続方法としては、上部ローラー８Ａを取付けている張り出しアーム、内槽３Ａの屋根板、又は内槽３Ａ上の別途補強部材等に、係合や固着などによって接続するように、エアーリフト用部材１７を張り出して形成してもよい。なお、後述する図６に示す複数のガス槽３を有する有水式ガスホルダー１を解体する実施形態例のように、エアーリフト用部材１７を移設し繰り返して使用するような場合には、この固着部は、ボルトやクランプ等の螺着構造の固定具などで着脱及び再使用が容易な取付構造にする。
【００２６】
基柱ガイド１６の事例を図５に基づいて説明する。基柱４は、平行辺部材の基柱フランジと、この平行する両基柱フランジ間を接続する基柱ウエブとからなる断面Ｈ形状のＩ形鋼やＨ形鋼で形成した場合を示している。この基柱４の降下、又は上昇を垂直方向に円滑に案内するように基柱ガイド１６を、水槽２の側壁５の外周に上下方向に所定間隔をおいて溶接等で固着して設ける。図５に示す基柱ガイド１６は、基柱４を挿通し遊嵌するように押え部材１８，１８と案内ローラー１９，１９で形成した場合を示す。つまり基柱フランジの外側面に当接させた状態で案内ローラー１９，１９を設け、チャンネル部材等で形成した押え部材１８，１８に長穴を設け、軸心をボルト等の固定具で調整して取付ける。基柱ガイド１６に挿通された基柱４の基柱フランジの外側面は、基柱４が降下又は上昇する際に、この押え部材１８と案内ローラー１９によって傾いたりねじれたりすることのないように規制され、基柱４は垂直方向に円滑に導かれ案内される。
【００２７】
このような案内ローラー１９を設けた場合には、基柱４は傾いたりねじれたりする動きが規制されるとともに抵抗が一層少なく円滑に導かれて降下する。なお、このローラの軸心は、押え部材１８，１８に設けた長穴にボルト等の固定具で間隔を調整自在に形成する。また、ローラーの軸心にスプリングバネ等を取付けて、ローラーが基柱フランジに弾力をもって当接し、強い押圧力が働くことなく円滑に回転するように形成してもよい。なお、図５に示した事例では基柱フランジの両外側面にそれぞれ案内ローラー１９，１９を設けた場合を示したが、基柱４にかかる荷重が小さい場合や高さが低い場合等で、基柱４が傾く恐れの少ない場合には、基柱フランジのいずれか一方の外側面だけに案内ローラー１９を設け、他方の外側面にはアングル部材等の案内部材を設けるなどすると基柱ガイド１６を簡略化することができる。また、基柱ガイド１６に滑りの良い、例えばシリコン合成樹脂材等の摩擦抵抗の少ない材料よりなる部材を設けたり、また基柱４と基柱ガイド１６との間にスプリング等の弾力性のある部材を設けると、摩擦抵抗がさらに小さくなり基柱４の降下が一層滑らかになる。
【００２８】
図６（Ａ），（Ｂ），（Ｃ），（Ｄ）に基づいて、この発明に係る工法の他の実施形態例として、少なくとも内外槽を備えた複数のガス槽３を有する有水式ガスホルダー１の解体工法と組立工法の手順を説明する。なお、解体工法は図６の右向き矢印の手順で行い、組立工法は図６の左向き矢印の手順で行う。この実施形態例は、複数槽のガス槽３のうち最内部のガス槽内槽３Ａのみに空気を給排気して上昇又は降下させ、エアーリフト用部材１７を移設しながら行う解体する工法、又は組立てる工法である。この内槽３Ａのみをエアーリフトさせて行う工法は、ガス槽３の重量は内槽３Ａのみであるため、空気圧をその分だけ小さくできるとともに、空気量も少なくできる。また、少なくとも内外槽を備えた複数のガス槽３を有する有水式ガスホルダー１は、一般的に架構１４が大きく基柱４にかかる荷重が大きいものであるが、ガス槽中槽３Ｂやガス槽外槽３Ｃ等に圧力の高い空気を入れて浮上させることがないので、複数の各ガス槽間を接続するシール部に水封切れを生じることがなく安全に適用できる。
【００２９】
解体工法は、図６（Ａ）から（Ｄ）に至る右向き矢印に従った手順で行う。まず、図６（Ａ）に示すように、基柱４の降下を垂直に案内する複数の基柱ガイド１６を水槽２の側壁５の上下方向に所定間隔をおいて設け、またガス槽内槽３Ａの最上昇時の位置、例えば上部ローラー８Ａが当接する上記基柱４の所定高さ位置に、エアーリフト用部材１７を取付ける。次いで、ガス槽３のガス出入管（図示省略）からガス槽内槽３Ａへ、空気を送って内槽３Ａを最上昇位置まで上昇させ、上記エアーリフト用部材１７に上部ローラー８Ａを当接して基柱４にかかる荷重を保持し、この基柱４を保持した状態で水槽側壁５周囲に固定した基柱取付部又は地面の基礎取付部（図示省略）を切断除去して基柱４にかかる荷重を支持する。この内槽３Ａの空気圧を受けて基柱４を支持した状態で、上記基柱ガイド１６より下方に位置する基柱４Ａ（図の斜線マーキング部）を地面上にて降下可能に切断除去するとともに、水槽２の歩廊１０上にてブレーシング（図示省略）等の基柱４を接続した架構１４を切断除去する。
【００３０】
続いて、図６（Ｂ）の実線で示すように、内槽３Ａ内の空気を抜いて上記切断除去分だけ上記基柱ガイド１６に案内させて基柱４下端を地面近傍に降下させる。この基柱４下端を地面又は水槽２の側壁に支持した状態で、再び上記エアーリフト用部材１７を、図の一点鎖線で示すように基柱４の所定高さ位置まで移動して設置し、さらに内槽３Ａへ空気を供給し内槽３Ａを上昇させ、図の一点鎖線で示すように支柱４にかかる荷重を支持し、この支持状態で、再び所定高さ分の基柱４Ｂ（図の斜線マーキング部）を切断除去する。
【００３１】
さらに続いて図６（Ｃ）に示すように、内槽３Ａの空気の排出で基柱４下端を地面近傍に降下させ、この地面又は水槽２側壁での支持状態でエアーリフト用部材１７を移設し、空気圧支持状態で基柱４Ｃ（図の斜線マーキング部）を地面上にて切断除去する。なお、基柱４がさらに高い場合、又はエアーリフトの一回当たりの距離、つまりストロークが小さい場合などでは、上述の下部基柱４の切断除去と基柱４の降下の各手順を、さらに細かく回数を増加させるなど順次繰り返して行う。このように、地面上及び水槽２の歩廊１０上の低い位置で、所定長さの基柱４及び基柱４に接続したブレーシング等の架構１４を切断除去し、基柱４を降下させながら下部から上部へと基柱４を含む架構１４を順次解体していく。
【００３２】
最後に、図６（Ｄ）に示すように、内槽３Ａの空気を排出し基柱４下端を地面又は水槽２の側壁に支持した状態で、地面上及び水槽２の歩廊１０上にて基柱４Ｄ（図の斜線マーキング部）及び基柱４に接続した上部のガーダー１２等の架構１４を解体撤去する。
【００３３】
また、組立工法は、上述の解体工法の手順とは全く逆の手順、つまり図６の左向き矢印で示した（Ｄ）から（Ａ）に至る手順に従って順次施工する。即ち、図６（Ｄ）に示すように、地面上及び水槽２の歩廊１０上にて上部の基柱４Ｄ及び基柱４に接続する上部のガーダー１２及びブレーシング等の架構１４を組立て、内槽３Ａの上部ローラー８Ａが当接する基柱４上部位置にエアーリフト用部材１７を取付ける。続いて、内槽３Ａ内への空気の供給と排出による空気圧支持と地上支持で、図６（Ｃ），（Ｂ），（Ａ）に示す手順に従って、基柱４の上昇とエアーリフト用部材１７の移設を順次繰り返しながら、基柱４の下部に基柱４Ｃ，４Ｂ，４Ａを地面上にて順次接続するとともに、水槽２の歩廊１０上にてブレーシング（図示省略）等の架構１４を接続して基柱４を含む架構１４を組み立てていく。
【００３４】
なお、上記エアーリフト用部材１７は、長いボルトやクランプ等の螺着構造の固定具などで基柱４を挟み付けて固定し、着脱及び再使用が容易な構造に形成すると、簡単容易に取付け取外しの作業ができる。つまり、このエアーリフト用部材１７の基柱４上部への移動設置は、ボルトやクランプ等を緩め、基柱４に沿ってずらせながら基柱４上部へ移動し設置すると作業能率がさらに向上する。
【００３５】
上述のように、空気圧を受けたガス槽３で支持した状態で、基柱４を含む架構１４を解体又は組立てる作業は、大掛かりで高い仮設足場を使用せず危険を伴う高所作業がなく、地面上の低所及び水槽２の周囲歩廊１０上で行うため、落下防止の安全設備や火花や溶断片等の飛散防止の防護対策などを大掛かりにする必要がなく、また大形の重機と広い敷地を必要としない。つまり、火災等の心配がなく安全で低い圧力の空気を使用し、空気の給排気で昇降を円滑簡単に繰返してでき、昇降するための重機等の特別な装置を必要とすることなく、基柱ガイド１６やエアーリフト用部材１７等の簡単な治具、送風機やブロアー等の簡単な給排気設備を使用して、作業能率良く解体作業又は組立作業ができるため、工期を短縮し、経済的にできる。
【００３６】
【発明の効果】
この発明に係る有水式ガスホルダーの工法は、上述のように、ガス槽内に供給した空気圧で基柱を支えその下部を切断除去又は組立て接続し、空気圧を受けた支持状態で降下又は上昇させる工程を順次繰り返して、地面上及び水槽の歩廊上の低所で、下部から上部へと基柱を含む架構を順次解体、又は上部から下部へと基柱を含む架構を順次組立てるので、解体するガス槽自体を解体に有効利用し、又は組立てた製品自体を組立てに有効利用するので、別途解体や組立て用の大形の重機を必要とすることがない。また、大掛かりで高い仮設足場を必要とすることがなく、高所での危険な作業がなく地面上又は水槽歩廊上にて安全に解体又は組立作業ができる。また、落下防止用安全ネットを張りめぐらす必要がなく、高所作業用の安全対策を必要とすることなく、高所作業に熟練した作業員を必要とせず、難しい作業もなく作業能率が良い。さらにまた、大形の重機等の移動用の広い作業場所等を必要としないので、狭い限られた敷地内でも、作業性が良く工期も短縮でき経済性の高い有水式ガスホルダーの工法となる。
【００３７】
また、解体工法では、高い場所での火気の使用と切断作業がないため、火花や溶断片の飛散落下防止策として高く大掛かりな防炎シートや防護壁等による養生などの防護対策を必要としない。また、解体した基柱等の重量物を高い場所から吊って降ろすための大型レッカーや大型クレーン、吊り装置等の大形の重機を必要としない上、大形の重機を使用する広い作業場所や、大形の重機を移動する広い通路を必要としない。また周囲の既設設備へ解体物等が飛散などしないように配慮し防護する必要がなく、防火対策、作業条件の制約などがないので、限られた狭い作業場所であっても解体作業が容易にできる。
【００３８】
上述のように、この発明の有水式ガスホルダーの工法は、大掛かりで高い仮設足場を使用せず危険を伴う高所作業がなく、低所で行うため、落下防止の安全設備や防護対策などを大掛かりにする必要がなく、また大形の重機と広い敷地を必要とせず、エアーリフト、つまり空気圧支持用の簡単な部材や給排気設備を使用して、作業能率良く、安全に、工期を短縮し、経済性良くできる。
【００３９】
また、上記工法のうち、エアーリフト用部材を基柱の最上部に取付け、単槽又は少なくとも内外槽を備えた複数槽のガス槽全体を降下又は上昇させる工法は、エアーリフト用部材を付け替える手間がなく、また全体を最上部で支えるため安定性が良く、また一方向に連続して昇降するため、作業能率が良い。
【００４０】
また、上記工法のうち、少なくとも内外槽を備えた複数槽のガス槽のうち内槽のみに空気を給排気して上昇又は降下させ、エアーリフト用部材を移設しながら解体する工法、又は組立てる工法は、空気による内槽の上昇高さが低いため内槽の上昇下降の移動が安定し安全性が向上する。また、内槽を浮上させるための空気の圧力も小さくでき、また架構の重量が大きい場合でもガス槽の接続シール部の水封切れ発生もなく、さらに空気の給排気量を少なくして施工することができる。
【００４１】
【図面の簡単な説明】
【図１】この発明に係る有水式ガスホルダーの工法の解体工法、及び組立工法を説明する一部省略した側面説明図である。
【図２】図１に続く工程を示す説明図である。
【図３】図２に続く工程を示す説明図である。
【図４】エアーリフト用部材の取付け状況を示す側面説明図である。
【図５】基柱ガイドの取付け状況を示す斜視説明図である。
【図６】（Ａ），（Ｂ），（Ｃ），（Ｄ）は、少なくとも内外槽を備えた複数のガス槽を有する有水式ガスホルダーの場合における、この発明に係る解体工法、及び組立工法の手順を示す側断面説明図である。
【図７】有水式ガスホルダーの一般例で、ガス槽が３槽の複数槽の場合の全体側面を示し、左半分は基柱を含む架構を記載し、右半分は基柱を含む架構を一部省略した説明図である。
【符号の説明】
１有水式ガスホルダー２水槽
３，３Ａ，３Ｂ，３Ｃガス槽
４，４Ａ，４Ｂ，４Ｃ，４Ｄ基柱
５側壁６底壁
７下部ローラー８，８Ａ上部ローラー
９基柱取付部１０歩廊
１１，１１Ａ，１１Ｂ，１１Ｃブレーシング
１２ガーダー１３ガス槽歩廊
１４架構１５ガス出入口
１６基柱ガイド１７エアーリフト用部材
１８押え部材１９案内ローラー[0001]
BACKGROUND OF THE INVENTION
In this invention, a plurality of base pillars for guiding the vertical movement of a gas tank floating by enclosing gas in the water tank are fixedly supported on the outer periphery of the side wall of the water tank or fixedly supported on the foundation of the outer ground of the water tank. The present invention relates to a construction method of a water-containing gas holder for disassembling or assembling a frame including a base pillar of the water-containing gas holder.
[0002]
[Prior art]
A general example of the water-containing gas holder 1 will be described with reference to FIG. The water-containing gas holder 1 stores water for water sealing in a water tank 2 composed of a disk-shaped bottom wall 6 and a cylindrical side wall 5, and a single tank or a plurality of tanks including at least an inner and outer tank in the water tank 2. A gas tank 3 is formed by floating a gas cylinder 3 with a top (a plurality of three tanks including an inner and outer tank and an inner tank), and a gas inlet / outlet pipe 15 is connected to the gas tank 3 sealed with water. Is supplied and discharged. In the water-containing gas holder 1 of FIG. 7, the gas tank 3 is composed of an innermost tank 3A, an intermediate middle tank 3B, and an outermost outer tank 3C, and seal water is provided between the gas tanks. This is a case of a relatively large water-containing gas holder 1 connected by a sealed seal (not shown).
[0003]
The hydrated gas holder 1 is provided with a plurality of base pillars 4 spaced from the side wall 5 of the water tank 2 around the outside at a predetermined interval. The general example shown in FIG. 7 shows a case where the lower part of each base pillar 4 is fixedly supported around the side wall 5 of the water tank 2 by a plurality of base pillar support supports, that is, base pillar attachment portions 9. In addition, as a method for fixing and supporting the base pillars 4, the base pillars 4 may be directly fixed to the ground foundation. The base column 4 is erected at a predetermined interval by a member having an H-shaped cross section such as I-shaped steel or H-shaped steel. The base column 4 is vertically supported by supplying and discharging gas around the whole with the base column 4 as a support frame. A frame 14 that supports the moving gas tank 3 is formed. This frame 14 is made of a reinforcing material such as a bracing 11 or a girder 12 made of horizontal and oblique angle members, channel members and the like so as to maintain the entire shape at a predetermined strength and a predetermined interval. It is formed in a stretched connection.
[0004]
Further, a water tank walkway 10 formed of a steel plate material such as a channel material and an angle material, and a steel plate material between the upper periphery of the water tank 2 and the surrounding base pillar 4 positioned at the boundary between the raised gas tanks 3. Further, a frame such as the gas tank corridor 13 and an elevating stairs (not shown) are installed. Further, in order to make the gas tank 3 move up and down smoothly, a lower roller 7 in contact with a guide (not shown) provided on the inner wall of the gas tank 3 and the water tank 2 is provided at the lower end of the gas tank 3 of each tank. In addition, an upper roller 8 is provided at the upper end of the gas tank 3 of each tank.
[0005]
[Problems to be solved by the invention]
When the water-containing gas holder 1 shown in FIG. 7 is used for a long time and needs to be dismantled due to aging, the disassembly of the gas tank 3 and the water tank 2 discharges the gas and removes the gas tank 3. After being lowered into the water tank 2 and draining the water from the water tank 2, the dismantling work could be safely performed in the space in the water tank 2 and the low area around the water tank 2. However, the dismantling work of the frame 14 including the base column 4 around the water tank 2 and the gas tank 3 is a large and expensive structure, and the dismantling work is large and dangerous. . In other words, a large and large temporary scaffolding is constructed along the inner and outer perimeters of the frame 14 that stands high around the outside of the water tank 2, and an operator rides on the temporary scaffolding in order from the upper part to the lower part. Large-scale dismantling work for the frame 14 was underway.
[0006]
The conventional method of dismantling a water-filled gas holder using a temporary scaffold or a large heavy machine as described above was erected from the side wall 5 of the water tank 2 around the outside at a predetermined interval. Since the frame 14 including the high and large base pillar 4 is sequentially cut from the upper part to the lower part and dismantled, it is a large-scale and dangerous work at a high place. In addition, safety measures for working in high places were required, such as a safety net for prevention of dropping around the entire periphery of a scaffold for dismantling work that was set up large and large. In addition, a large number of skilled workers suitable for high-altitude work were required. Also, since cutting is performed using fire at high places, measures to prevent sparks and molten fragments from scattering or falling to the surroundings, that is, fire curing such as high flameproof sheets and protective walls in the surroundings, etc. A large-scale protective measure was required. Furthermore, when other equipment or structures are close to the surroundings, make sure that no sparks are scattered on other equipment or structures, or that dismantled materials do not come into contact with them, and that protective measures are taken. It became necessary.
[0007]
In addition, in order to drop the heavy load of the frame 14 including the base 4 composed of the dismantled base 4, bracing 11, girder 12, gas tank corridor 13, etc., while suspending it from a high place by cutting it to a descendable size. Large heavy equipment such as large wreckers, large cranes and suspension devices are required, and a large work place for operating these large heavy machines and a wide passage for movement are required. Further, in a narrow place where an existing structure or the like is approaching in the vicinity, the work scale is restricted, the work efficiency is lowered, and the dismantling work is difficult.
[0008]
In addition, when the water-containing gas holder 1 shown in FIG. 7 is newly assembled and constructed, the gas tank 3 and the water tank 2 are assembled in the space in the water tank 2 and around the water tank 2 as in the case of disassembly. We were able to safely assemble in a low place. However, the assembling work of the frame 14 including the base column 4 around the water tank 2 and the gas tank 3 is a large and expensive construction because the frame 14 is a large and expensive structure. . That is, a large and large temporary scaffolding is constructed along the outer periphery of the water tank 2, and workers are on the temporary scaffolding, and the large-scale assembly of the frame 14 including the base pillar 4 is sequentially performed from the lower part to the upper part. Work was underway.
[0009]
A conventional method for assembling a water-containing gas holder using a temporary scaffold such as the above-mentioned is a frame including a large and large base column 4 that is separated from the side wall 5 of the water tank 2 around the outside at a predetermined interval. Since the assembly work was sequentially performed from the lower part to the upper part, it was a large-scale and dangerous work at a high place. That is, safety measures for working at high places, such as a safety net for preventing fall, etc., are put around the entire periphery of a scaffold for assembly work that is large and large. In addition, a large number of skilled workers suitable for high-altitude work were required.
[0010]
In addition, a large wrecker, a large crane, and a crane are used to lift heavy objects, each of which is formed of several frame units, such as the base pillar 4, bracing 11, girder 12, gas tank corridor 13, etc., constituting the frame 14, Large heavy machinery such as a lifting device is required, and a large work place for operating these large heavy machinery and a wide passage for movement are required. Further, in a narrow place where an existing structure or the like is approaching in the vicinity, the work efficiency is lowered and the assembling work is difficult.
[0011]
The present invention has been made in view of the above-mentioned problems of the prior art, and does not require a large and expensive temporary scaffold, does not work at high places with danger, and is large in the amount of fallen objects such as sparks. No need for high protection measures, no need for large heavy machinery, etc., no need for a large work space or moving passage, safe and efficient work, high economic efficiency, It provides a method for dismantling and assembling a water-containing gas holder.
[0012]
[Means for Solving the Problems]
The construction method of the water-containing gas holder according to the present invention disassembles or assembles the frame including the base column in a state where the base column of the water-containing gas holder is supported by a gas tank receiving air pressure.
[0013]
Also, the dismantling method of the water-containing gas holder according to the present invention provides a plurality of base pillar guides that guide the descent of the base pillar vertically at predetermined intervals in the vertical direction of the side wall of the water tank and are connected to the upper part of the gas tank Attach the air lift member to the top of the base pillar, send air from the gas inlet / outlet pipe of the gas tank to the gas tank, raise the gas tank to the top, and connect the upper part of the gas tank to the air lift member The load applied to the base column is held, and the base column mounting portion fixed around the water tank side wall is cut and removed while the base column is held to support the load applied to the base column, and the base column is supported by the gas tank. The base pillar of a predetermined height located below the base pillar guide in the state is cut and removed so as to be able to descend on the ground, and connected to a base pillar such as bracing of the predetermined height on the aquarium corridor Cutting and removing the frame and removing the air from the gas tank And a step of lowering the base pillar by guiding it to the base pillar guide by the predetermined height of cutting removal, and cutting the lower base pillar and the like of the predetermined height while supporting the base pillar in the gas tank. The frame including the base pillar is disassembled from the lower part while sequentially repeating the step of removing and the step of lowering the base pillar by discharging the air from the gas tank.
[0014]
Also, the assembly method of the water-containing gas holder according to the present invention provides a plurality of base pillar guides for vertically guiding the rise of the base pillar at predetermined intervals in the vertical direction of the side wall of the water tank. The base pillar is erected from the ground or the side wall of the tank to a predetermined height position on the aquarium walkway, and a frame that connects to the base pillar such as the upper girder and bracing on the base tank on the aquarium walkway Assemble and attach an air lift member connected to the upper part of the gas tank at the top of the base column, and send air from the gas inlet / outlet pipe of the gas tank to the gas tank to raise the gas tank and connect it to the air lift member. Supporting the load applied to the column and guiding the base column together with the gas tank to the base column guide by a predetermined height and raising the base column while the base column is supported by the gas tank; The base pillar below the base pillar guide by the amount Assembling and connecting on the ground and assembling and connecting a frame that connects to the base pillar such as bracing of a predetermined height on the water tank corridor, and supports the base pillar by supplying air to the gas tank Then, the frame including the base pillar is assembled from the upper part while sequentially repeating the step of raising by a predetermined height and the step of assembling and connecting the lower base pillar and the like of the raised portion in a state supported by the gas tank.
[0015]
Further, the dismantling method of the water-containing gas holder according to the present invention is a method of disassembling a water-containing gas holder having a plurality of gas tanks having at least inner and outer tanks. A column guide is provided at a predetermined interval in the vertical direction of the side wall of the water tank, and an air lift member connected to the upper part of the inner tank of the gas tank is positioned at a predetermined height of the base pillar, that is, a position when the inner tank is at its highest position. To the inner tank by sending air from the gas inlet / outlet pipe of the gas tank to the innermost tank and connecting the air lift member to hold the load applied to the base pillar. In the state, the base pillar mounting portion fixed around the water tank side wall is cut and removed to support the load applied to the base pillar, and the base pillar is supported by the predetermined height located below the base pillar guide in the state where the base pillar is supported in the inner tank. Cutting and removing the base pillar of the ground on the ground so that it can descend Cutting and removing the frame connected to the base pillar such as bracing of the predetermined height on the aisle of the water tank, and letting the air from the inner tank be guided to the base pillar guide by the amount of the cut and removed. A step of lowering the base column and a step of moving the air lift member again to a predetermined height position of the base column while supporting the lower end of the base column on the ground or the water tank side wall. A step of cutting and removing the lower base pillar and the like for a predetermined height while the base pillar is supported by supplying air, a step of lowering the base pillar by discharging the air from the inner tank, and an air lift in a supported state on the ground or the tank side wall The frame including the base pillar is dismantled from the lower part while sequentially repeating the process of transferring the members for use.
[0016]
Further, the assembly method of the water-containing gas holder according to the present invention is a method of assembling a water-containing gas holder having a plurality of gas tanks having at least inner and outer tanks. A guide is provided at a predetermined interval in the vertical direction of the side wall of the aquarium, and the base pillar is erected from the ground or the side wall of the aquarium to a predetermined height position on the aquarium of the aquarium. Assemble and connect the upper girder, bracing and other frame to the base of the water tank on the corridor of the water tank, and lift the air lift to the specified height of the base, that is, the highest position of the inner tank of the gas tank A member is attached, air is sent from the gas inlet / outlet pipe of the gas tank to the inner tank, the inner tank is raised to the highest position, and connected to the air lift member to support the load applied to the base pillar together with the inner tank. The above-mentioned base pillar guy for a predetermined height The base column is assembled and connected on the ground below the base column guide while being supported by the base column, and connected to the base column such as bracing on the aquarium of the water tank. A step of assembling and connecting the frame; and a step of removing the air from the inner tank and moving the air lift member again to a predetermined height position of the base pillar while supporting the lower end of the base pillar on the ground or the water tank side wall. , A step of supporting the base column by supplying air to the inner tank and raising it by a predetermined height, a step of assembling and connecting the lower base column and the like of the elevated portion in this support state, and a lower end of the base column by discharging the air from the inner tank The frame including the base pillar is assembled from the upper part while sequentially repeating the step of moving the air lift member while being supported by the ground or the water tank side wall.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Based on FIG. 1 thru | or FIG. 6, the disassembly construction method and assembly method of the water-containing gas holder which concern on this invention are demonstrated.
[0018]
1 to 3 show a procedure for sequentially dismantling the frame 14 including the base 4 of the water-containing gas holder 1. The water-containing gas holder 1 shows an example in which the gas tank 3 has one single tank, but the single tank procedure described in detail below also when the gas tank 3 is a plurality of tanks having at least an inner and outer tank. Follow the same procedure. When disassembling the frame 14 including the base pillar 4, a plurality of base pillar guides 16 are provided at predetermined intervals in the vertical direction along the base pillar 4 so that each base pillar 4 guides the descent vertically without tilting. It is provided on the side wall 5 of the water tank 2. Further, it is connected to the upper part of the gas tank 3 by engagement or coupling so as to support the load applied to the base pillar 4, that is, the weight of the frame 14 including the base pillar 4, the bracing 11, the girder 12, the gas tank corridor 13, and the like. An air lift member 17 is provided. In addition, the member 17 for an air lift of a figure shows the case where it attaches to the vicinity of the girder 12 in the uppermost part of the base pillar 4 so that the upper roller 8 of the gas tank 3 may contact | abut.
[0019]
As described above, after the base pillar guide 16 and the air lift member 17 are attached, as shown in FIG. 1, the gas inlet / outlet pipe 15 of the gas tank 3 is used and the gas tank 3 is installed for the air lift. The air tank (not shown) such as a blower or a blower is used to send air and raise the gas tank 3 to the top by air pressure. 4 holds the load. In this state, the base column 4 is held in the gas tank 3, and the base column support support fixed around the side wall 5 of the water tank 2, that is, the base column attachment part or the joint part (not shown) with the ground foundation is cut. Remove. Further, the base column 4A (the hatched marking portion in the figure) of a predetermined height located below the base column guide 16 can be lowered on the ground while receiving the air pressure of the gas tank 3 and supporting the base column 4. To cut off. At the same time, the frame 14 (the hatched marking portion in the figure) connected to the base pillar 4 such as the bracing 11A within the predetermined height, for example, within the reachable range, is cut and removed on the corridor 10 of the water tank 2. To do.
[0020]
Subsequently, as shown in FIG. 2, the air in the gas tank 3 is extracted, and the base pillar 4 is lowered by being guided by the base pillar guide 16 by the cut and removed portion of the predetermined height. In the state shown in FIG. 2, the base pillar 4 </ b> B (the hatched marking portion in the figure) of a predetermined height positioned again below the base pillar guide 16 is cut and removed so as to be able to descend on the ground, and the walkway 10 of the water tank 2 is removed. The frame 14 connected to the base 4 such as the bracing 11B having a predetermined height is cut and removed.
[0021]
Subsequently, as shown in FIG. 3, the air in the gas tank 3 is again evacuated, and the base pillar 4 is lowered by being guided by the base pillar guide 16 by the cut and removed portion of the predetermined height. In the state shown in FIG. 3, the base pillar 4 </ b> C (the hatched marking portion in the drawing) of a predetermined height located again below the base pillar guide 16 is cut and removed so as to be able to descend on the ground, and the corridor 10 of the water tank 2. The frame 14 (hatched portion in the figure) connected to the base 4 such as the bracing 11C is cut and removed. In this way, with the base column 4 supported by the gas tank 3 receiving air pressure, the cutting and removing steps are sequentially repeated on the ground and on the walkway 10 of the water tank 2 to include the base column 4. 14 is dismantled from the bottom.
[0022]
Moreover, when assembling the base pillar 4 etc. of the water-containing gas holder 1, it constructs according to the procedure from FIG. 3 to FIG. 1 completely contrary to the procedure of the above-mentioned dismantling method. That is, when assembling the frame 14 including the base column 4 including the base column 4, the bracing 11, the girder 12, and the like, the base columns 4 are vertically moved along the base column 4 so as to guide the ascending vertically without tilting. A plurality of base pillar guides 16 are provided on the side wall 5 of the water tank 2 at predetermined intervals in the direction. Next, the base pillar 4 is assembled on the ground, and the upper part of the frame 14 connected to the base pillar 4 such as the bracing 11 and the girder 12 is assembled on the walkway 10 of the water tank 2. Subsequently, an air lift member 17 is attached to a position in the vicinity of the girder 12 at the uppermost portion of the base column 4 so that the upper roller 8 of the gas tank 3 comes into contact therewith.
[0023]
Subsequently, as shown in FIG. 3, air is sent from the gas inlet / outlet pipe 15 of the gas tank 3 into the gas tank 3 to raise the gas tank 3 by air pressure, and the upper roller 8 is brought into contact with the air lift member 17. Then, the base pillar 4 is raised along the base pillar guide 16, and a load applied to the base pillar 4 is held at a predetermined height position, for example, a reachable height. In the state of FIG. 3 in which the base column 4 is held in the gas tank 3 in this way, the base column 4C of a predetermined height positioned below the base column guide 16 is assembled and connected on the ground, and the walkway of the water tank 2 The frame 14 connected to the base 4 4 such as the bracing 11C in the predetermined height range is assembled and connected on 10.
[0024]
Subsequently, as shown in FIGS. 2 to 1, air is supplied to the gas tank 3 to support the base column 4, and the base column 4 is raised by sequentially guiding the base column guide 16 by a predetermined height. Let In the state shown in FIG. 2 to FIG. 1, the base pillars 4B and 4A of a predetermined height positioned again below the base pillar guide 16 are assembled and connected sequentially on the ground, and the base pillars 4B and 4A are predetermined on the walkway 10 of the water tank 2. The frames 14 connected to the base pillars 4 such as the bracings 11B and 11A for the height are sequentially assembled and connected. In this way, the base pillar 4 and the frame 14 such as the bracing 11 connected to the base pillar 4 are connected to the base pillar 4 on the ground and the corridor 10 of the water tank 2 in a state where the base pillar 4 is supported by the gas tank 3 receiving air pressure. Finally, the lower part of the base column 4 is fixed by the base column support support around the side wall 5 of the water tank 2, that is, the base column mounting portion or the ground base (not shown). The entire frame 14 including is constructed.
[0025]
An example of the air lift member 17 will be described with reference to FIG. The air lift member 17 is formed in a bracket shape using a channel material, an angle material, and the like, and is fixed to the flange surface on the inner surface side of the base column 4, and the base column 4 is attached to the gas tank 3, that is, the inner tank 3A of the gas tank. It connects to the upper part, and it forms so that the load concerning the base pillar 4 may be transmitted. In the example of FIG. 4, the case where the member 17 for an air lift was formed so that it might engage and connect with the inner tank 3A of a gas tank via the upper roller 8, ie, the uppermost roller 8A, was shown. Other connection methods for connecting the base column 4 and the upper part of the inner tank 3A include an overhanging arm to which the upper roller 8A is attached, a roof plate of the inner tank 3A, a separate reinforcing member on the inner tank 3A, etc. The air lift member 17 may be formed so as to be extended so as to be connected by joining or adhering. In the case where the air lift member 17 is relocated and used repeatedly as in the embodiment in which the water-containing gas holder 1 having the plurality of gas tanks 3 shown in FIG. The fixing portion has a mounting structure that can be easily attached / detached and reused by a screw-type fixing tool such as a bolt or a clamp.
[0026]
An example of the base pillar guide 16 will be described with reference to FIG. The base column 4 shows a case where it is formed of an I-shaped steel or H-shaped steel having an H-shaped cross section composed of a base column flange of a parallel side member and a base column web connecting between the parallel base column flanges. . A base pillar guide 16 is fixedly provided on the outer periphery of the side wall 5 of the water tank 2 at a predetermined interval in the vertical direction by welding or the like so as to smoothly guide the descending or rising of the base pillar 4 in the vertical direction. The base pillar guide 16 shown in FIG. 5 shows a case where the base pillar 4 is formed by the pressing members 18 and 18 and the guide rollers 19 and 19 so as to be freely inserted through the base pillar 4. In other words, guide rollers 19 and 19 are provided in contact with the outer surface of the base pillar flange, oblong holes are provided in the presser members 18 and 18 formed of channel members and the shaft center is adjusted with a fixture such as a bolt. And install. The outer surface of the base pillar flange of the base pillar 4 inserted through the base pillar guide 16 is not tilted or twisted by the pressing member 18 and the guide roller 19 when the base pillar 4 is lowered or raised. The base pillar 4 is smoothly guided and guided in the vertical direction.
[0027]
In the case where such a guide roller 19 is provided, the base column 4 is controlled to tilt and twist, and is smoothly guided and lowered with less resistance. The roller shaft center is formed in a slot provided in the presser members 18 and 18 so that the interval can be adjusted with a fixing tool such as a bolt. Alternatively, a spring spring or the like may be attached to the shaft center of the roller so that the roller contacts the base pillar flange with elasticity and rotates smoothly without exerting a strong pressing force. In the example shown in FIG. 5, the guide rollers 19 and 19 are provided on both outer side surfaces of the base pillar flange, respectively. However, when the load applied to the base pillar 4 is small or the height is low, When there is little possibility that the base pillar 4 is inclined, it is possible to provide the guide roller 19 only on one outer surface of the base pillar flange and provide a guide member such as an angle member on the other outer face. Can be simplified. Further, the base pillar guide 16 is provided with a member made of a material having a low frictional resistance such as a silicon synthetic resin material having a good sliding property, and a spring or the like is elastic between the base pillar 4 and the base pillar guide 16. When the member is provided, the frictional resistance is further reduced, and the descent of the base column 4 becomes smoother.
[0028]
Based on FIG. 6 (A), (B), (C), (D), as another embodiment of the construction method according to the present invention, a water type having a plurality of gas tanks 3 provided with at least inner and outer tanks. The procedure for dismantling and assembling the gas holder 1 will be described. Note that the dismantling method is performed according to the procedure indicated by the right-pointing arrow in FIG. 6, and the assembling method is performed according to the procedure indicated by the left-pointing arrow in FIG. In this embodiment, the disassembling method is performed while supplying or exhausting air only to the innermost gas tank inner tank 3A among the plurality of gas tanks 3 and moving the air lift member 17 up or down. It is a construction method to assemble. In the construction method performed by air-lifting only the inner tank 3A, since the weight of the gas tank 3 is only the inner tank 3A, the air pressure can be reduced by that amount and the amount of air can also be reduced. In addition, the water-containing gas holder 1 having a plurality of gas tanks 3 having at least inner and outer tanks is generally a structure having a large frame 14 and a large load applied to the base column 4. Since high-pressure air is not put into the tank 3C or the like so as to float up, the seal portion connecting the plurality of gas tanks can be safely applied without causing water seal breakage.
[0029]
The dismantling method is performed according to the procedure according to the right-pointing arrow from FIG. 6 (A) to (D). First, as shown in FIG. 6A, a plurality of base pillar guides 16 for vertically guiding the descent of the base pillar 4 are provided at predetermined intervals in the vertical direction of the side wall 5 of the water tank 2, and the tank in the gas tank The air lift member 17 is attached to a position at the highest position of 3A, for example, a predetermined height position of the base pillar 4 with which the upper roller 8A contacts. Next, air is sent from a gas inlet / outlet pipe (not shown) of the gas tank 3 to the gas tank inner tank 3A to raise the inner tank 3A to the highest position, and the upper roller 8A is brought into contact with the air lift member 17. The load applied to the base column 4 is held, and the base column mounting portion fixed to the periphery of the water tank side wall 5 or the foundation mounting portion (not shown) on the ground is cut off and applied to the base column 4 while the base column 4 is held. Support the load. In a state where the base column 4 is supported by receiving the air pressure of the inner tank 3A, the base column 4A (the hatched marking portion in the figure) located below the base column guide 16 is cut and removed so as to be lowered on the ground. The frame 14 connected to the base 4 such as bracing (not shown) is cut and removed on the walkway 10 of the water tank 2.
[0030]
Subsequently, as shown by a solid line in FIG. 6 (B), the air in the inner tank 3A is extracted, and the base pillar guide 16 is guided by the cut and removed amount to lower the lower end of the base pillar 4 to the vicinity of the ground. With the lower end of the base column 4 supported on the ground or the side wall of the water tank 2, the air lift member 17 is again moved to a predetermined height position of the base column 4 as shown by a one-dot chain line in FIG. Further, air is supplied to the inner tank 3A to raise the inner tank 3A, and the load applied to the support column 4 is supported as shown by a one-dot chain line in the figure. Cut and remove the hatched marking part).
[0031]
Subsequently, as shown in FIG. 6 (C), the lower end of the base 4 is lowered to the vicinity of the ground by discharging the air from the inner tank 3A, and the air lift member 17 is moved while being supported by the ground or the side wall of the water tank 2. Then, the base pillar 4C (the hatched marking portion in the figure) is cut and removed on the ground in a pneumatic support state. In addition, when the base pillar 4 is higher, or when the distance per one time of the air lift, that is, when the stroke is small, the steps of cutting and removing the lower base pillar 4 and lowering the base pillar 4 are further detailed. Repeatedly, such as increasing the number of times. In this way, at a low position on the ground and on the walkway 10 of the aquarium 2, the base pillar 4 having a predetermined length and the frame 14 such as bracing connected to the base pillar 4 are cut and removed, and the base pillar 4 is lowered. The frame 14 including the base 4 is sequentially disassembled from the lower part to the upper part.
[0032]
Finally, as shown in FIG. 6 (D), the air in the inner tank 3A is discharged and the lower end of the base pillar 4 is supported on the ground or the side wall of the water tank 2, and on the ground and on the walkway 10 of the water tank 2. The frame 14 such as the upper girder 12 connected to the column 4D (shaded marking portion in the figure) and the base column 4 is dismantled and removed.
[0033]
Further, the assembly method is sequentially applied in accordance with a procedure completely opposite to the above-described dismantling method, that is, the procedure from (D) to (A) indicated by the left-pointing arrow in FIG. That is, as shown in FIG. 6D, the upper base column 4D and the upper girder 12 connected to the base column 4 and the frame 14 such as bracing are assembled on the ground and on the walkway 10 of the water tank 2. An air lift member 17 is attached to the upper position of the base pillar 4 with which the upper roller 8A of the tank 3A contacts. Subsequently, in accordance with the procedures shown in FIGS. 6C, 6B, and 6A, the base column 4 is lifted and the air lift member is supported by the pneumatic support and ground support by supplying and discharging air into the inner tank 3A. The base pillars 4C, 4B, 4A are sequentially connected on the ground to the lower part of the base pillar 4 while the transfer of 17 is sequentially repeated, and a frame 14 such as bracing (not shown) is provided on the walkway 10 of the water tank 2. The frame 14 including the base 4 is assembled by connecting.
[0034]
The air lift member 17 can be easily and easily mounted by fixing the base pillar 4 by sandwiching and fixing the base pillar 4 with a screw-type fixing tool such as a long bolt or a clamp. Can be removed. That is, when the air lift member 17 is moved and installed on the upper part of the base pillar 4, the work efficiency is further improved if the bolts and clamps are loosened and moved to the upper part of the base pillar 4 while being displaced along the base pillar 4.
[0035]
As described above, the work of disassembling or assembling the frame 14 including the base pillar 4 while being supported by the gas tank 3 that receives air pressure is a large-scale work without using a high temporary scaffold and without a dangerous work at a high place. Since it is carried out at low places on the ground and on the walking corridor 10 of the water tank 2, there is no need to use safety equipment for preventing fall and protective measures for preventing the scattering of sparks, molten fragments, etc. No site is required. In other words, safe and low-pressure air is used without worrying about fire, etc., and the air can be raised and lowered smoothly and easily and repeatedly without using special equipment such as heavy machinery for raising and lowering. Using simple jigs such as column guides 16 and air lift members 17 and simple air supply and exhaust equipment such as blowers and blowers, disassembly work or assembly work can be carried out with high work efficiency. Can be.
[0036]
【The invention's effect】
As described above, the construction method of the water-containing gas holder according to the present invention supports the base column by the air pressure supplied into the gas tank, and cuts or removes or assembles the lower part thereof, and lowers or rises in the support state receiving the air pressure. The steps including the base pillars are sequentially disassembled from the bottom to the top, or the base pillars are assembled sequentially from the top to the bottom at the low place on the ground and the aquarium of the aquarium. Since the gas tank itself is effectively used for disassembly or the assembled product itself is effectively used for assembly, a large heavy machine for separate disassembly and assembly is not required. In addition, a large and high temporary scaffold is not required, and there is no dangerous work at a high place, and the work can be safely disassembled or assembled on the ground or on the water tank corridor. In addition, there is no need to hang a safety net for preventing fall, no safety measures for working at high places, no need for skilled workers in high places, high work efficiency without difficult work. Furthermore, since there is no need for a large work area for moving large heavy machinery, etc., even in a narrow limited site, workability is good and the construction period can be shortened. Become.
[0037]
In addition, the demolition method does not require the use and cutting of fire in high places, so it does not require protective measures such as curing with a large and large flameproof sheet or protective wall as a measure to prevent the sparks and molten fragments from scattering and falling. . In addition, it does not require large heavy equipment such as large wreckers, large cranes, and lifting devices to suspend and dismantle heavy objects such as dismantled base pillars from high places. It does not require a wide passage to move large heavy machinery. In addition, there is no need to protect the surrounding existing facilities so that dismantled items do not scatter, and there are no fire prevention measures or restrictions on work conditions, so it is easy to dismantle even in a limited work space. it can.
[0038]
As described above, the construction method of the water-containing gas holder of the present invention is a large scale, does not use a high temporary scaffold, does not work at a dangerous high place, and is performed in a low place. No need for large-scale equipment, large heavy machinery and a large site, and air lift, that is, using simple members for air pressure support and air supply / exhaust equipment, improving work efficiency and safety. It can be shortened and economically improved.
[0039]
In addition, among the above methods, the method of attaching the air lift member to the uppermost part of the base pillar and lowering or raising the entire gas tank of a single tank or at least a plurality of tanks including the inner and outer tanks is an effort to replace the air lift member. In addition, since the whole is supported by the uppermost part, the stability is good, and since it moves up and down continuously in one direction, the work efficiency is good.
[0040]
Also, among the above methods, at least a plurality of gas tanks having inner and outer tanks, a method of assembling and assembling, or a method of disassembling while assembling and moving air lift members by raising and lowering air only to the inner tank Since the rising height of the inner tank by air is low, the movement of the inner tank rising and lowering is stabilized and the safety is improved. In addition, the air pressure for floating the inner tank can be reduced, and even if the weight of the frame is large, there is no occurrence of water-sealing at the connection seal part of the gas tank, and construction is performed with a reduced amount of air supply and exhaust. be able to.
[0041]
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a partially omitted side view for explaining a dismantling method and an assembling method for a water-based gas holder according to the present invention.
FIG. 2 is an explanatory view showing a step that follows FIG. 1;
3 is an explanatory diagram showing a step that follows FIG. 2. FIG.
FIG. 4 is an explanatory side view showing a state of attachment of an air lift member.
FIG. 5 is a perspective explanatory view showing a mounting state of the base pillar guide.
6 (A), (B), (C), (D) are dismantling methods according to the present invention in the case of a water-containing gas holder having a plurality of gas tanks having at least inner and outer tanks, and It is side sectional explanatory drawing which shows the procedure of an assembly method.
FIG. 7 is a general example of a water-containing gas holder, and shows an overall side view when there are a plurality of three gas tanks. The left half describes a frame including a base pillar, and the right half includes a base pillar. It is explanatory drawing which abbreviate | omitted one part.
[Explanation of symbols]
1 Water-containing gas holder 2 Water tank
3,3A, 3B, 3C Gas tank
4,4A, 4B, 4C, 4D
5 Side wall 6 Bottom wall
7 Lower roller 8, 8A Upper roller
9 Base mounting part 10 Walkway
11, 11A, 11B, 11C Bracing
12 Girder 13 Gas tank walkway
14 Frame 15 Gas inlet / outlet
16 Base pillar guide 17 Air lift member
18 Presser member 19 Guide roller

Claims

A method for constructing a water-containing gas holder, comprising disassembling or assembling a frame including the base column in a state where the base column of the water-containing gas holder is supported by a gas tank receiving air pressure.

An air lift member connected to the upper part of the gas tank of the water-containing gas holder is attached to the uppermost part of the base column, and air is sent to the gas tank to be raised, and the upper part of the gas tank is connected to the air lift member. Supports the load applied to the pillar, and cuts and removes the lower base pillar for a predetermined height while supporting the base pillar in the gas tank, and the base pillar such as bracing for the predetermined height on the aquarium of the water tank. A step of cutting and removing the frame connected to the base, and a step of removing the air from the gas tank and lowering the base pillar by the amount of the cut and removed of the predetermined height, and supporting the base pillar in the gas tank. A dismantling method for a water-containing gas holder, wherein the frame including the base pillar is dismantled from the lower part while the process of cutting and removing the steel is sequentially repeated.

The base column of the water-containing gas holder is erected from the ground or the side wall of the tank to a predetermined height position on the aquarium corridor, and the frame connecting the base column such as the upper girder and bracing to the base column Assemble above and attach the air lift member connected to the upper part of the gas tank to the top of this base pillar, send air to the gas tank and raise it to connect to the air lift member and support the load on the base pillar The base pillar is raised by a predetermined height, and the lower base pillar is assembled and connected by the raised height while the base pillar is supported by the gas tank, and at the predetermined height on the water tank corridor. And a step of assembling and connecting a frame connecting to the base pillar such as bracing, and connecting the base pillar to the base pillar and the base pillar in a state where the base pillar is elevated in the gas tank and the base pillar is supported by the gas tank. Do not repeat the process of assembling and connecting frames. Assembly method of Arimizu type gas holder, characterized in that assembling the Frame containing Luo Motobashira from the top.

In the construction method of disassembling a water-containing gas holder having at least a plurality of gas tanks having inner and outer tanks, an air lift member connected to the upper part of the inner tank of the gas tank is attached to a predetermined height position of the base pillar, and the inner tank To the air lift member connected to the above air lift member to support the load applied to the base pillar, while the base pillar is supported by the inner tank, the lower base pillar of a predetermined height is cut and removed and the water tank A step of cutting and removing the frame connected to the base pillar such as bracing for the predetermined height on the corridor, a step of removing the air from the inner tank and lowering the base pillar by the cut height of the predetermined height A step of moving the air lift member again to a predetermined height position of the base pillar while supporting the lower end of the base pillar, and dismantling the frame including the base pillar from the lower part while sequentially repeating the steps. A water-containing gas hole characterized by Demolishing method of chromatography.

In a method of assembling a water-containing gas holder having a plurality of gas tanks having at least inner and outer tanks, a base pillar is erected from the ground or the side wall of the tank to a predetermined height position on the water tank corridor, and an upper girder is provided on the base pillar. Assemble and connect the frame connecting to the base pillar such as bracing on the aquarium of the water tank, attach an air lift member at a predetermined height position of this base pillar, send air to the inner tank of the gas tank and ascend Connecting the air lift member to support the load applied to the base pillar and raising the base pillar by a predetermined height; assembling and connecting the lower base pillar while supporting the base pillar, and a water tank corridor Assembling and connecting the frame to be connected to the base pillar such as bracing above, and the air lift member is again positioned at the predetermined height position of the base pillar in a state where the air in the inner tank is drawn and the lower end of the base pillar is supported And the process of moving to Provided, the assembly method of Arimizu type gas holder, characterized in that assembling the Frame containing group pillar from above while sequentially repeating the above steps.