JP4578453B2 - Chimney dismantling method - Google Patents

Chimney dismantling method Download PDF

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JP4578453B2
JP4578453B2 JP2006253844A JP2006253844A JP4578453B2 JP 4578453 B2 JP4578453 B2 JP 4578453B2 JP 2006253844 A JP2006253844 A JP 2006253844A JP 2006253844 A JP2006253844 A JP 2006253844A JP 4578453 B2 JP4578453 B2 JP 4578453B2
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concrete
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cylinder
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partition plate
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JP2008075295A (en
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達廣 古長
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Okumura Corp
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本発明は、内筒が耐火レンガ製で外筒がコンクリート製の内外二重筒構造を有する煙突の解体方法に関するものである。   The present invention relates to a method for disassembling a chimney having an inner / outer double cylinder structure in which an inner cylinder is made of refractory brick and an outer cylinder is made of concrete.

従来から、極めて高温の排ガスが発生する加熱炉等においては、その煙突の構造として鉄筋コンクリート製の外筒と耐火レンガ製の内筒との優れた耐火、耐熱性を有する二重筒構造の煙突が採用されている。この煙突が老朽化して解体する場合、耐火レンガの解体片とコンクリートの解体片との再利用、再資源化を図るためにはこれらの解体片を分別することが必要となるが、内外筒を同時に解体すると、コンクリートの解体片と耐火レンガの解体片とが混合した状態となって、分別するにはそのための設備や多大な労力を要することになる。   Conventionally, in a heating furnace or the like in which extremely high temperature exhaust gas is generated, a chimney having a double cylinder structure having excellent fire resistance and heat resistance of an outer cylinder made of reinforced concrete and an inner cylinder made of refractory brick as a chimney structure. It has been adopted. When this chimney is aged and dismantled, it is necessary to separate these dismantled pieces in order to reuse and recycle dismantled pieces of refractory bricks and concrete. When demolished at the same time, the concrete demolition pieces and the refractory brick demolition pieces are mixed, and separation requires a large amount of equipment and much labor.

そのため、例えば、特許文献1に記載されているように、内筒解体手段を吊り上げて煙突の上端開口部内に挿入し、この内筒解体手段によって耐火レンガ製の内筒をその上端から下端に向かって解体して該解体片を煙突内の下端に落下させ、煙突の下端部に解体片排出用開口部を設けおいてこの開口部を通じて解体片を外部に排除している。そして、この耐火レンガ製の内筒の解体が終了すると、今度は外筒解体手段を吊り上げてこの外筒解体手段により外筒をその上端から下端に向かって解体し、その解体片を外筒内に落下させて該外筒の下端から上記解体片排出用開口部を通じて外部に排出している。
特許第3548565号公報
Therefore, for example, as described in Patent Document 1, the inner cylinder dismantling means is lifted and inserted into the upper end opening of the chimney, and the inner cylinder dismantling means moves the fire brick inner cylinder from its upper end to its lower end. The dismantled piece is dropped to the lower end in the chimney, a dismantled piece discharge opening is provided at the lower end of the chimney, and the dismantled piece is excluded to the outside through this opening. When the dismantling of the refractory brick inner cylinder is completed, the outer cylinder disassembling means is then lifted, and the outer cylinder disassembling means disassembles the outer cylinder from the upper end to the lower end, and the dismantled piece is disassembled in the outer cylinder. And is discharged from the lower end of the outer cylinder to the outside through the dismantling piece discharge opening.
Japanese Patent No. 3548565

しかしながら、上記特許文献1に記載の煙突の解体方法によれば、解体に際して、予めこの煙突の下端部に重機によって掻き出し可能な比較的大きな解体片排出用開口部を設けておくので、この開口部によって煙突の強度が著しく低下し、地震が発生した場合や強風等によって倒壊する虞れがあり、安全性に劣るといった問題点がある。特に、耐火レンガ製の内筒を全長に亘って解体した後、コンクリート製の外筒を解体する際に、この外筒は長期の使用によって老朽化して脆くなっているため、解体は容易に行えても上記のようにその下端に解体片排出用開口部を設けておくと、地震や強風によって横揺れが発生し、倒壊の危険性が増大するといった問題点があった。   However, according to the chimney dismantling method described in Patent Document 1, a relatively large dismantling piece discharge opening that can be scraped by a heavy machine is provided in advance at the lower end of the chimney when disassembling. As a result, the strength of the chimney is significantly reduced, and there is a risk that the chimney will collapse due to an earthquake or strong winds, resulting in poor safety. In particular, after dismantling the refractory brick inner cylinder over its entire length, when dismantling the concrete outer cylinder, the outer cylinder has become obsolete and brittle due to long-term use, so disassembly can be performed easily. However, if an opening for dismantling pieces is provided at the lower end as described above, there is a problem that rolls are generated by an earthquake or strong wind, and the risk of collapse increases.

本発明は、このような問題点に鑑みてなされたもので、その目的とするところは、コンクリート製の外筒と耐火レンガ製の内筒との二重筒からなる煙突を、安全に且つ能率よくコンクリート解体片とレンガ解体片とに正確に分別しながら解体することができる煙突の解体方法を提供するにある。   The present invention has been made in view of such problems, and an object of the present invention is to provide a safe and efficient chimney composed of a double cylinder of a concrete outer cylinder and a refractory brick inner cylinder. The object is to provide a method for disassembling a chimney that can be dismantled while accurately separating it into concrete dismantling pieces and brick dismantling pieces.

上記目的を達成するために本発明の煙突の解体方法は、請求項1に記載したように、コンクリート製の外筒と耐火レンガ製の内筒との二重筒からなる煙突の解体方法であって、コンクリート製の外筒を残した状態で耐火レンガ製の内筒を上端から下端部に向かって解体してそのレンガ解体片を未解体の内筒下端部内に堆積させる工程と、この堆積物の上面に仕切板を載置する工程と、この仕切板の載置後に上記コンクリート製の外筒をその上端から下部に向かって解体してそのコンクリート解体片を上記仕切板上における未解体の外筒下部内に堆積させる工程と、この外筒の下端部外周面から内筒の下端部内に連通する開口部を設けてこの開口部を通じて上記レンガ解体片の堆積物をその堆積下端側から外部に取り除く工程と、この堆積物の除去と仕切板の撤去に引き続いて上記開口部からコンクリート解体片の堆積物を外部に取り除く工程と、このコンクリート解体片の堆積物の除去後に上記未解体の内筒下端部と外筒下部とを解体、除去する工程とからなることを特徴とする。   In order to achieve the above object, the chimney dismantling method of the present invention is a chimney dismantling method comprising a double cylinder of a concrete outer cylinder and a refractory brick inner cylinder as described in claim 1. The step of disassembling the refractory brick inner cylinder from the upper end to the lower end with the concrete outer cylinder remaining, and depositing the brick demolition pieces in the lower end of the undisassembled inner cylinder, and this deposit Placing the partition plate on the upper surface of the steel plate, and disassembling the concrete outer cylinder from the upper end to the lower portion after placing the partition plate, and removing the concrete demolition piece on the partition plate A step of depositing in the lower part of the cylinder, and an opening communicating from the outer peripheral surface of the lower end of the outer cylinder to the lower end of the inner cylinder, through which the brick demolition pieces accumulated from the lower end of the accumulation to the outside The removal process and the deposit Removing the deposit of concrete demolition pieces from the opening following the removal and removal of the partition plate, and removing the lower end of the inner cylinder and the lower part of the outer cylinder after removing the deposits of the concrete demolition pieces. It comprises the steps of dismantling and removing.

この煙突解体方法において、請求項2に係る発明は、耐火レンガ製の内筒はその内周面を上端から下端に向かって徐々に大径に形成している一方、仕切板は外径が外筒の上端開口部よりも小径の円板部とこの円板部の外周端縁に外径が上記内筒の下端部の内径よりも大径で且つ周方向に小間隔毎に切目を介して複数の弾性可撓片に分割している弾性リング部材を取り付けてなり、この仕切板を外筒の上端開口部から吊り下ろしてその円板部を内筒解体片の堆積物の上面に載置すると共に弾性リング部材の各弾性可撓片を未解体の内筒内周面に接して上方に屈曲させていることを特徴とする。   In this chimney disassembling method, the invention according to claim 2 is that the inner cylinder of the refractory brick is formed such that its inner peripheral surface gradually increases in diameter from the upper end toward the lower end, while the partition plate has an outer diameter of the outer cylinder. The outer diameter is larger than the inner diameter of the lower end portion of the inner cylinder at the outer peripheral edge of the disk portion having a smaller diameter than the upper end opening portion of the cylinder and the outer peripheral edge of the disc portion, and through the cuts at small intervals in the circumferential direction. An elastic ring member divided into a plurality of elastic flexible pieces is attached, and the partition plate is suspended from the upper end opening of the outer cylinder, and the disk portion is placed on the upper surface of the deposit of the inner cylinder dismantling pieces. In addition, each elastic flexible piece of the elastic ring member is bent upward in contact with the inner peripheral surface of the undisassembled inner cylinder.

請求項1に係る発明によれば、コンクリート製の外筒と耐火レンガ製の内筒との二重筒からなる煙突を解体する際に、この煙突の下端部に解体片排出用の開口部を設けておくことなく、まず、コンクリート製の外筒を残した状態で耐火レンガ製の内筒を上端から下端部に向かって解体するので、解体処理中において地震や強風等による影響を受けても、煙突の支持基端部である下端部には強度を低下させる解体片排出用の開口部などを設けていないから所定の強度を保持して安全性の要求を満たしながら解体作業を行うことができるものであり、さらに、解体したレンガ解体片が煙突の下端部内に落下した際に塵埃等の飛散が発生するが、煙突の下端部内は全周に亘って周壁面で囲まれているから、外部に飛散するのを防止することができ、良好な環境を維持しながら解体作業を行うことができると共に解体したレンガ解体片を該下端部内に確実に堆積しておくことができる。   According to the invention which concerns on Claim 1, when disassembling the chimney which consists of a double cylinder of a concrete outer cylinder and a refractory brick inner cylinder, the opening part for discharge | disassembly of a demolition piece is carried out at the lower end part of this chimney. Without disposing, the refractory brick inner cylinder is disassembled from the upper end to the lower end with the concrete outer cylinder remaining, so even if it is affected by earthquakes or strong winds during the dismantling process The lower end, which is the support base end of the chimney, is not provided with an opening for discharging a dismantling piece that reduces the strength, so that dismantling work can be performed while maintaining a predetermined strength and satisfying safety requirements. In addition, when the dismantled brick demolition pieces fall into the lower end of the chimney, scattering of dust and the like occurs, but the lower end of the chimney is surrounded by a peripheral wall surface over the entire circumference. Can be prevented from splashing outside, Can be securely deposited bricks dismantling pieces dismantled it is possible to perform the dismantling work while maintaining a good environment to the lower end portion.

この耐火レンガ製の内筒を、そのレンガ解体片を堆積させる容積を有する下端部を残した状態になるまで解体したのちこの堆積物の上面に仕切板を載置し、しかるのち、上記コンクリート製の外筒をその上端から下部に向かって解体してそのコンクリート解体片を上記仕切板上における未解体の外筒下部内に堆積させるので、煙突下部内において、レンガ解体片の堆積物を下側にして該レンガ解体片の堆積物とコンクリート解体片の堆積物とを正確に区分した状態で堆積させておくことができると共に、このコンクリート製外筒の解体時にも、煙突の下端部には強度を低下させる解体片排出用の開口部などを設けていないので、該外筒が所定の強度を保持して解体作業が比較的安全に行うことができる。   After disassembling the refractory brick inner cylinder until the bottom end having a capacity for depositing the brick demolition pieces is left, a partition plate is placed on the upper surface of the deposit. The upper cylinder is disassembled from the upper end to the lower part, and the concrete demolition pieces are deposited in the lower part of the undemolitioned outer cylinder on the partition plate. Thus, the brick demolition piece deposit and the concrete demolition piece deposit can be accumulated in a state of being accurately separated, and the strength of the lower end of the chimney is also reduced when the concrete outer cylinder is disassembled. Since there is no opening for discharging the dismantling piece that reduces the above, the outer cylinder maintains a predetermined strength, and the disassembling work can be performed relatively safely.

次いで、未解体状態で残存している煙突の下端部において、その外筒の下端部外周面から内筒の下端部内に連通する解体片排出用開口部を設けるので、この開口部を開設作業時には煙突の高さが低くなっているから、開口部を設けても安全性を確保することができるものであり、この状態にして重機等を使用し、該開口部を通じてレンガ解体片の堆積物とコンクリート堆積物とを順次、能率よく掻き出すことができる。この際、開口部を通じてレンガ解体片の堆積物の下層部側を掻き出すと、該レンガ解体片の堆積物とこの堆積物上に仕切板を介して積層しているコンクリート解体片の堆積物とが上記掻き出し量に応じて煙突下端部内を自動的に降下して、仕切板を介して仕切られたレンガ解体片とコンクリート解体片との堆積物を分別した状態で順次、円滑に排除することができる。   Next, in the lower end portion of the chimney remaining in the undisassembled state, a dismantling piece discharge opening communicating from the outer peripheral surface of the lower end portion of the outer cylinder to the lower end portion of the inner cylinder is provided. Since the height of the chimney is low, it is possible to ensure safety even if an opening is provided. In this state, using heavy equipment, etc. It is possible to scrape concrete deposits sequentially and efficiently. At this time, when scraping the lower layer side of the brick demolition pieces through the openings, the brick demolition pieces deposits and the concrete demolition piece stacks stacked on the deposits via a partition plate are formed. The inside of the chimney lower end automatically descends according to the scraping amount, and the deposits of the brick demolition pieces and the concrete demolition pieces partitioned through the partition plate can be sequentially and smoothly removed. .

さらに、上記コンクリート解体片の堆積物の除去後に上記未解体の内筒下端部を解体、除去する工程と、上記未解体の外筒下部を解体、除去する工程とを行うものであるから、堆積物除去後の未解体の煙突下部を、上記同様にレンガ解体片とコンクリート解体片とに別々に解体することができて、分別作業を必要とすることなくこれらの解体片の再利用、再資源化を図ることができる。   Furthermore, after removing the deposit of the concrete demolition pieces, the step of disassembling and removing the lower end portion of the undisassembled inner cylinder and the step of disassembling and removing the lower part of the outer cylinder of the undeconstructed The lower part of the chimney that has not been demolished can be disassembled separately into brick demolition pieces and concrete demolition pieces in the same way as above, and these demolition pieces can be reused and recycled without the need for separation work. Can be achieved.

また、請求項2に係る発明によれば、上記耐火レンガ製の内筒はその内周面を上端から下端に向かって徐々に大径に形成している一方、仕切板は外径が外径の上端開口部よりも小径の円板部とこの円板部の外周端縁に外径が上記内筒の下端部の内径よりも大径で且つ周方向に小間隔毎に切目を介して複数の弾性可撓片に分割している弾性リング部材を取り付けてなるものであるから、耐火レンガ製の内筒をその上端から下端部に達する長さ部分を解体してそのレンガ解体片を煙突の下端部内に堆積させた後に、コンクリート製の外筒の上端開口部を通じて該仕切板を簡単に吊り下ろすことができると共にその円板部をレンガ解体片の堆積物上に敷設させ且つ該円板部の周縁に設けている弾性リング部材を未解体の内筒上端部内周面に接して上方に屈曲させた状態にすることができ、従って、この仕切板上に堆積させるコンクリート解体片が仕切板下方のレンガ解体片に混入するのを防止することができ、レンガ解体片の堆積物とコンクリート解体片の堆積物とを確実に区画しておくことができると共に、レンガ解体片の排除時にはその除去に従ってこの仕切板が堆積物と一体に降下し、その降下に従って未解体の内筒の内径が徐々に大径となるが、仕切板の弾性リング部材が該内筒の内径の拡がりに応じて下方に展開しながら常に内筒の内周面に弾性的に密接した状態を保持し、コンクリート解体片がレンガ解体片に混入するのを確実に防止することができる。   Further, according to the invention according to claim 2, the inner cylinder of the refractory brick is formed such that its inner peripheral surface gradually increases in diameter from the upper end toward the lower end, while the partition plate has an outer diameter of the outer diameter. The outer peripheral edge of the disk part is smaller in diameter than the upper end opening of the inner part, and the outer diameter is larger than the inner diameter of the lower end part of the inner cylinder, and a plurality of gaps are provided at intervals in the circumferential direction. Since the elastic ring member divided into the elastic flexible pieces is attached, the length of the inner cylinder made of refractory bricks reaching from the upper end to the lower end is disassembled, and the brick dismantled piece is removed from the chimney. After being deposited in the lower end portion, the partition plate can be easily suspended through the upper end opening of the concrete outer cylinder, and the disc portion is laid on the brick demolition piece deposit and the disc portion The elastic ring member provided on the peripheral edge of the Therefore, it is possible to prevent the concrete demolition pieces deposited on the partition plate from being mixed into the brick demolition pieces below the partition plate. The debris can be reliably separated from the deposit, and when the brick demolition piece is removed, the partition plate descends integrally with the deposit according to the removal, and the inner diameter of the undisassembled inner cylinder is reduced according to the removal. The diameter gradually increases, but the elastic ring member of the partition plate is kept elastically in close contact with the inner peripheral surface of the inner cylinder while expanding downward according to the expansion of the inner diameter of the inner cylinder. It can prevent reliably that a piece mixes in a brick demolition piece.

次に本発明の具体的な実施の形態を図面について説明すると、図1は解体すべき煙突Aの縦断正面図であって、この煙突Aは耐火レンガを積み上げてなる耐火レンガ製の内筒1と、この内筒1を全長に亘って被覆してなるコンクリート製の外筒2との二重筒構造を有し、耐火性、耐熱性をより高めるために、耐火レンガ製内筒1の外周面とコンクリート製外筒2の内周面との間に全長に亘って隙間3を設けている。さらに、これらの内外筒1、2はその上端から下端に向かって徐々に内外径とも大径となるように形成されている。なお、コンクリート製の外筒2としては、鉄筋コンクリート製であっても、無筋コンクリート製であってもよい。   Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal front view of a chimney A to be disassembled, and the chimney A is an inner cylinder 1 made of refractory bricks formed by stacking refractory bricks. The outer periphery of the refractory brick inner cylinder 1 has a double cylinder structure with a concrete outer cylinder 2 that covers the entire length of the inner cylinder 1 in order to further improve fire resistance and heat resistance. A gap 3 is provided over the entire length between the surface and the inner peripheral surface of the concrete outer cylinder 2. Further, the inner and outer cylinders 1 and 2 are formed so that the inner and outer diameters gradually increase from the upper end toward the lower end. The concrete outer cylinder 2 may be made of reinforced concrete or unreinforced concrete.

この煙突Aが老朽化して解体する場合、内筒1を解体して得られるレンガ解体片1aと外筒2を解体して得られるコンクリート解体片2aとの再資源化を図るには、レンガ解体片1aとコンクリート解体片2aとが混ざり合うことなく分別された状態となるように解体することが望ましく、且つ、その解体作業も煙突Aの強度を低下させることなく安全に行えるようにする必要がある。   When this chimney A is aged and dismantled, in order to recycle the brick dismantling piece 1a obtained by dismantling the inner cylinder 1 and the concrete dismantling piece 2a obtained by dismantling the outer cylinder 2, It is desirable to disassemble the piece 1a and the concrete demolition piece 2a so that they are separated without mixing, and the disassembly work needs to be performed safely without reducing the strength of the chimney A. is there.

そのため、本発明においては、まず、耐火レンガ製の内筒1を図4に示すようにその下端部が所定長さだけ残存するように、上端から該下端部に向かって解体してそのレンガ解体片1aを未解体の内筒下端部1'内に堆積させ、次いで、図5に示すようにこのレンガ解体片1aの堆積物上に仕切板4を載置したのち、コンクリート製の外筒2を図12に示すように、その下部が所定長さだけ残存するように、上端から該下部に達するまで解体してそのコンクリート解体片2aを該外筒2の未解体の下部2'における上記仕切板4上の上端部内に落下させて仕切板4上に堆積させる。   Therefore, in the present invention, first, the inner cylinder 1 made of refractory bricks is disassembled from the upper end toward the lower end so that the lower end remains for a predetermined length as shown in FIG. The piece 1a is deposited in the undisassembled inner cylinder lower end portion 1 ', and then the partition plate 4 is placed on the deposit of the brick demolition pieces 1a as shown in FIG. As shown in FIG. 12, the concrete dismantled piece 2a is disassembled from the upper end until it reaches the lower part so that the lower part remains for a predetermined length, and the partition in the lower part 2 'of the undisassembled part of the outer cylinder 2 It is dropped into the upper end portion on the plate 4 and deposited on the partition plate 4.

これらの内筒1と外筒2との解体作業は、煙突Aの下端部に解体片排出用開口部を設けることなく該下端部が全面的に内筒1と外筒2との周壁面によって形成された状態で行われるものであり、煙突Aの下端部壁面に、予め開口部が設けられている場合には、その開口部をコンクリートの打設等によるコンクリート壁で密閉して煙突下端部を補強し、地震や強風によって煙突Aが倒れ難い強度を保持するように改善しておくものである。なお、開口部の補強方法としては、コンクリート壁の形成以外に、板材を張設してなる鋼製枠等によって開口部を密閉しておいてもよい。   The disassembly work of the inner cylinder 1 and the outer cylinder 2 is performed by the peripheral wall surface between the inner cylinder 1 and the outer cylinder 2 without providing the opening for discharging the dismantling piece at the lower end of the chimney A. When the opening is provided in advance in the wall of the lower end of the chimney A, the lower end of the chimney is sealed with a concrete wall by placing concrete or the like. The chimney A is improved so as to maintain a strength that does not easily collapse due to an earthquake or strong wind. In addition, as a method of reinforcing the opening, the opening may be sealed with a steel frame or the like in which a plate material is stretched in addition to the formation of the concrete wall.

上記のように、解体後の煙突Aにおける未解体の下部A1内の下半部内にレンガ解体片1aの堆積物を、上半部側に仕切板4を介してコンクリート解体片2aの堆積物を収納した状態にしたのち、図13に示すように、この下部A1の下端部周壁に外筒2の下端部外周面から内筒1の下端部内に連通する解体片排出用開口部5を設けてこの開口部5を通じてレンガ解体片1aを掻き出し、次いで、仕切板3を撤去したのち、コンクリート解体片2aを掻き出し、これらのレンガ解体片1aとコンクリート解体片2aとを別々に資材として再利用するものである。   As described above, the pile of brick demolition pieces 1a is placed in the lower half of the undisassembled lower part A1 of the chimney A after demolition, and the deposit of concrete demolition pieces 2a is placed on the upper half side via the partition plate 4. After the storage state, as shown in FIG. 13, a dismantling piece discharge opening 5 is provided on the peripheral wall of the lower end portion of the lower part A1 so as to communicate from the outer peripheral surface of the lower end portion of the outer cylinder 2 into the lower end portion of the inner cylinder 1. The brick demolition piece 1a is scraped through the opening 5, and then the partition plate 3 is removed, and then the concrete demolition piece 2a is scraped, and the brick demolition piece 1a and the concrete demolition piece 2a are reused separately as materials. It is.

さらに、レンガ解体片1aとコンクリート解体片2aとの堆積物の排除により空になった未解体の煙突下部A1は、上記同様にして、その未解体の内筒下端部を解体して上記開口部5を通じて外部に排出したのち、未解体の外筒2の下部を解体、除去してもよく、或いは、まずこの未解体の外筒下部を重機等を使用して未解体の内筒下端部が残存するようにその周囲から解体し、しかるのち、この未解体の内筒下端部を解体してもよい。   Further, the undemolition chimney lower part A1 emptied due to the removal of the deposits of the brick demolition piece 1a and the concrete demolition piece 2a is disassembled in the same manner as described above, and the lower end portion of the undemolition inner cylinder is dismantled. 5, the lower part of the undisassembled outer cylinder 2 may be disassembled and removed, or first, the lower part of the undisassembled inner cylinder is first removed by using a heavy machine or the like. It may be disassembled from its surroundings so that it remains, and then the undisassembled inner cylinder lower end may be disassembled.

上記煙突Aの解体方法をさらに詳しく説明すると、煙突Aにおける耐火レンガ製内筒1を解体する解体手段10としては、例えば、特開2005−265338号公報に記載されている装置を使用することができる。この解体手段10は図2に示すように、吊り下げた状態で内筒1内に挿入可能な支持体11の下端両側部に、下端部を先細の楔部13、13を形成している一対の楔アーム12、12の上端部を回動自在に枢着してジャッキ等の作動によりこれらの楔アーム12、12を半径方向に開閉させるように構成していると共に、これらの楔ーム12、12の下方側に、下端に耐火レンガ製の内筒1の目地部分を内側から衝撃的に破断する刃部15、15を形成している一対のツースアーム14、14の上端部を回動自在に装着してジャッキ等の作動によりこれらのツースアーム14、14を半径方向に開閉させるように構成している。   The dismantling method of the chimney A will be described in more detail. As the dismantling means 10 for disassembling the refractory brick inner cylinder 1 in the chimney A, for example, an apparatus described in JP-A-2005-265338 may be used. it can. As shown in FIG. 2, the disassembling means 10 includes a pair of wedges 13 and 13 having tapered lower ends on both sides of the lower end of a support 11 that can be inserted into the inner cylinder 1 in a suspended state. The upper ends of the wedge arms 12 and 12 are pivotally mounted so that the wedge arms 12 and 12 can be opened and closed in the radial direction by operation of a jack or the like. The upper ends of a pair of tooth arms 14 and 14 are formed on the lower side of the pair of teeth arms 14 and 14, which form blade portions 15 and 15 that impactably break the joint portion of the fire-resistant brick inner cylinder 1 from the inside at the lower end. These tooth arms 14 and 14 are configured to be opened and closed in the radial direction by operating a jack or the like.

このように構成した解体手段10をクレーン(図示せず)によって吊支して図1〜図3に示すように煙突Aの上方から煙突A内に吊り下げて耐火レンガ製の内筒1をその上端から下端部に向かって解体していく。この解体方法は、まず、一対の楔アーム12、12を径方向に開いてその楔部13、13を内筒1と外筒2間の隙間3の上方に位置させたのち、解体手段10を降下させて楔部13、13を隙間3内に挿入する。次いで、一対のシースアーム14、14をジャッキにより半径方向に開いてその刃部15、15を内筒1の内周面に衝撃的に当接させることによりその部分の耐火レンガの目地を破断したのち、これらの一対のシースアーム14、14を元の閉止位置に戻す。   The dismantling means 10 constructed in this manner is suspended by a crane (not shown) and suspended from the top of the chimney A in the chimney A as shown in FIGS. Dismantling from the upper end to the lower end. In this disassembling method, first, a pair of wedge arms 12 and 12 are opened in the radial direction, and the wedge portions 13 and 13 are positioned above the gap 3 between the inner cylinder 1 and the outer cylinder 2, and then the disassembling means 10 is moved. The wedge parts 13 and 13 are inserted into the gap 3 by lowering. Next, the pair of sheath arms 14 and 14 are opened in the radial direction by jacks, and the blade portions 15 and 15 are brought into impact contact with the inner peripheral surface of the inner cylinder 1 to break the joints of the refractory bricks at the portions. After that, the pair of sheath arms 14 and 14 are returned to the original closed position.

しかるのち、解体手段10をさらに降下させてその重量を上記楔部13、13に作用させ、耐火レンガ製の内筒1を内径方向に押圧すると共に楔アーム12、12をジャッキにより閉じる方向に回動させることにより、外筒2を解体することなく耐火レンガ製内筒1の上端部を上記破断部から内側に解体し、このレンガ解体片1aを煙突A内を落下させて該煙突Aの内筒下端部内に収容する。同様にしてこの解体手段10により耐火レンガ製内筒1を下端部に向かって解体し、解体したレンガ解体片1aをこの内筒1の下端部内に堆積させる。   After that, the disassembling means 10 is further lowered and its weight is applied to the wedge parts 13, 13 so that the inner cylinder 1 made of refractory bricks is pressed in the inner diameter direction and the wedge arms 12, 12 are closed in a direction to be closed with a jack. By moving, the upper end portion of the refractory brick inner cylinder 1 is disassembled inward from the fractured portion without disassembling the outer cylinder 2, and the brick demolition piece 1a is dropped inside the chimney A so that the inside of the chimney A Housed in the bottom end of the tube. Similarly, the dismantling means 10 disassembles the refractory brick inner cylinder 1 toward the lower end portion, and deposits the dismantled brick dismantling pieces 1 a in the lower end portion of the inner cylinder 1.

解体手段10による耐火レンガ製内筒1の解体は、図4に示すように、堆積するレンガ解体片1aの容積に見合う内容積を有する下端部1'が残存する状態となるまで該内筒1の上端から下端部1'に達するまで行われ、しかるのち、解体手段10を撤去する。   As shown in FIG. 4, the dismantling means 10 dismantles the fire-resistant brick inner cylinder 1 until the lower end portion 1 ′ having an inner volume corresponding to the volume of the brick demolition pieces 1a remains. Is performed from the upper end to the lower end 1 ′, and then the dismantling means 10 is removed.

次いで、次に解体すべき外筒2の上端からクレーンを使用して仕切板4を外筒2内に吊り下ろして図5に示すように、上記内筒1における未解体の下端部1'内に堆積したレンガ解体片1aの堆積物上に載置する。   Next, the partition plate 4 is suspended in the outer cylinder 2 using a crane from the upper end of the outer cylinder 2 to be next disassembled, and as shown in FIG. It is placed on the pile of brick demolition pieces 1a deposited on.

仕切板4は図6〜図8に示すように、外径が外筒2の上端開口部の内径よりも小径の鉄板よりなる円板部4aと、この円板部4aの外周端縁に内周端縁を一体に固着し、且つ、外径が上記内筒1における未解体部分の下端の内径よりも大径の円環形状の弾性リング部材4bとからなり、この弾性リング部材4bに周方向に小間隔毎に該弾性リング部材4bの外周端縁から円板部4aの外周端縁に向かって切り込んだ切目4cを設けてこの切目4cを介して複数の弾性可撓片4b' に分割した構造を有している。図中、4dは弾性リング部材4bの内周端縁部を円板部4aに押さえリング4eを介して固着しているボルト、4fは円板部4aの上面における外周四方部に突設した吊りフック係止金具である。   As shown in FIGS. 6 to 8, the partition plate 4 has a disk portion 4a made of an iron plate whose outer diameter is smaller than the inner diameter of the upper end opening of the outer cylinder 2, and an inner peripheral edge of the disk portion 4a. An annular elastic ring member 4b having a peripheral edge fixed integrally and having an outer diameter larger than the inner diameter of the lower end of the undisassembled portion of the inner cylinder 1 is formed around the elastic ring member 4b. A cut 4c cut from the outer peripheral edge of the elastic ring member 4b toward the outer peripheral edge of the disc portion 4a is provided at small intervals in the direction and divided into a plurality of elastic flexible pieces 4b 'through the cut 4c. It has the structure. In the figure, 4d is a bolt in which the inner peripheral edge of the elastic ring member 4b is fixed to the disc portion 4a via a holding ring 4e, and 4f is a suspension projecting from the outer peripheral four sides on the upper surface of the disc portion 4a. It is a hook locking metal fitting.

この仕切板4の四方の係止金具4fにクレーンのフックを係止させて該仕切板4を水平状に保持した状態で外筒2の上端開口部に挿入すると、弾性リング部材4bの全ての弾性可撓片4b' の下面が外筒2の上端面に当接したのち、外筒2の内周面に摺接しながらこれらの弾性可撓片4b' が上方に屈曲し、この状態で、外筒2内を吊り降ろして内筒1における未解体の下端部1'の上端開口部内に挿入し、上向きに屈曲した弾性リング部材4bの弾性可撓片4b' を該開口端部の内周面に圧接させた状態で円板部4aをレンガ解体片1aの堆積物の上面に載置する。なお、内筒1や外筒2はその内径を上端から下端に向かって徐々に大径となるように形成されているが、外筒2の内周面に上向きに屈曲した状態で摺接している仕切板4の弾性リング部材4bは下降するに従って展開する方向に弾性変形しながら常に外筒2の内周面に弾性的に密接した状態を保持し、未解体の内筒下端部1'内に受け入れられた場合もその状態を保持する。   When the hooks of the crane are locked to the four locking metal fittings 4f of the partition plate 4 and the partition plate 4 is held in a horizontal state and inserted into the upper end opening of the outer cylinder 2, all the elastic ring members 4b After the lower surface of the elastic flexible piece 4b ′ is in contact with the upper end surface of the outer cylinder 2, the elastic flexible piece 4b ′ is bent upward while sliding on the inner peripheral surface of the outer cylinder 2, and in this state, The inside of the outer cylinder 2 is suspended and inserted into the upper end opening of the undisassembled lower end 1 ′ of the inner cylinder 1, and the elastic flexible piece 4b ′ of the elastic ring member 4b bent upward is the inner circumference of the opening end. The disc part 4a is placed on the upper surface of the deposit of the brick dismantling pieces 1a in a state of being pressed against the surface. The inner cylinder 1 and the outer cylinder 2 are formed so that the inner diameter gradually increases from the upper end toward the lower end, but they are slidably contacted with the inner peripheral surface of the outer cylinder 2 in an upwardly bent state. The elastic ring member 4b of the partition plate 4 is kept elastically in close contact with the inner peripheral surface of the outer cylinder 2 while being elastically deformed in the direction of deployment as it descends, and remains in the undisassembled inner cylinder lower end 1 '. If it is accepted, the state is maintained.

次いで、図9に示すように、コンクリート製の外筒2の解体手段20による該外筒2の上端から下部に向かっての解体作業に移る。この解体手段20としては、例えば、図10に示すように、クレーンによって吊り下げられる設備搭載用水平台21と、この水平台21の下面に装着された旋回フレーム22と、この旋回フレーム22に吊支されてコンクリート製外筒2を該外筒2の内外周面側からそれぞれ掴持する一対の挟圧アーム23、24と、外筒2の外周面側を押圧する一方の挟圧アーム23に取り付けられてこの挟圧アーム23の下方近傍部の外筒外周面部分を破砕する先端にチゼル26を有するブレーカからなる打撃装置25とから構成された装置を使用する。なお、外筒2が鉄筋コンクリート製の場合には、上記一対の挟圧アーム23、24の対向面に鉄筋を切断する鉄筋切断刃(図示せず)を設けておけばよい。   Next, as shown in FIG. 9, the disassembly work from the upper end of the outer cylinder 2 toward the lower part by the dismantling means 20 of the concrete outer cylinder 2 is started. As the disassembling means 20, for example, as shown in FIG. 10, a facility-mounted horizontal base 21 suspended by a crane, a turning frame 22 mounted on the lower surface of the horizontal base 21, and a suspension support Attached to a pair of sandwiching arms 23 and 24 for gripping the concrete outer cylinder 2 from the inner and outer peripheral surfaces of the outer cylinder 2 and one sandwiching arm 23 for pressing the outer peripheral surface of the outer cylinder 2 Then, a device constituted by a striking device 25 composed of a breaker having a chisel 26 at the tip for crushing the outer cylinder outer peripheral surface portion in the lower vicinity of the pinching arm 23 is used. When the outer cylinder 2 is made of reinforced concrete, a reinforcing bar cutting blade (not shown) for cutting the reinforcing bars may be provided on the opposing surfaces of the pair of sandwiching arms 23 and 24.

また、上記設備搭載用水平台21上には上記旋回フレーム22や一対の挟圧アーム23、24、打撃手段25等を作動させるエンジンや油圧ポンプ、油圧モータ、油タンク、発電機、無線操作制御部などが搭載されている。   Further, an engine, a hydraulic pump, a hydraulic motor, an oil tank, a generator, a radio operation control unit for operating the swivel frame 22, the pair of clamping arms 23, 24, the striking means 25, etc. Etc. are installed.

このように構成した解体手段20をクレーン(図示せず)によって吊支して図9に示すように、内筒1がその下端部1'まで解体されている煙突Aにおける外筒2の上端部を一対の挟圧アーム23、24によって挟着させ、この状態にして打撃装置25を作動させてその先端チゼル26を外筒2の上端部外周面に押し付けることにより亀裂を発生させながら内周面に向かって食い込ませていくことにより挟圧アーム23、24で挟持されたコンクリート部分の下方部を破壊する。破壊されたコンクリート解体片2aは挟圧アーム23、24によって挟持された状態にあり、この挟圧アーム23、24を外筒2内に移動させて挟持を解くことにより該コンクリート解体片2aを落下させて上記仕切板4上に収容する。   The disassembling means 20 constructed in this manner is suspended by a crane (not shown) and, as shown in FIG. 9, the upper end portion of the outer tube 2 in the chimney A in which the inner tube 1 is disassembled to its lower end portion 1 ′. Is clamped by a pair of clamping arms 23 and 24, the impact device 25 is operated in this state, and the tip chisel 26 is pressed against the outer peripheral surface of the upper end portion of the outer cylinder 2 while generating cracks. The lower portion of the concrete portion sandwiched between the sandwiching arms 23 and 24 is destroyed by biting in toward the surface. The destroyed concrete demolition piece 2a is in a state of being clamped by the pinching arms 23 and 24. The concrete demolition piece 2a is dropped by moving the pinching arms 23 and 24 into the outer cylinder 2 and releasing the pinching. And accommodated on the partition plate 4.

なお、コンクリート製外筒2が老朽化していて脆い場合には、上記打撃装置25を必要とすることなく、破砕すべきコンクリート部分を挟持した一対の挟圧アーム23、24を外筒2内側に移動させながらその挟圧力を増大させることによって、挟持されたコンクリート製外筒2の上端部を内方に折り曲げるようにして破砕することができる。   In addition, when the concrete outer cylinder 2 is aging and fragile, the pair of pressing arms 23 and 24 holding the concrete portion to be crushed are placed inside the outer cylinder 2 without the need for the impact device 25. By increasing the clamping pressure while moving, the upper end of the sandwiched concrete outer cylinder 2 can be crushed so as to be bent inward.

この解体手段20によりコンクリート製外筒2をその上端部から下部に向かって解体し、図11に示すように、解体したコンクリート解体片2aを未解体の内筒下端部1'内に堆積しているレンガ解体片1a上に敷設した上記仕切板3上に堆積させる。この際、仕切板3はその外周部の弾性リング部材4bを未解体の内筒1における開口端部の内周面に全面的に密接させているから、コンクリート解体片2aはレンガ解体片1a側に混入することなく、仕切板3上に確実に堆積させておくことができる。   With this disassembling means 20, the concrete outer cylinder 2 is disassembled from the upper end to the lower part, and as shown in FIG. 11, the dismantled concrete dismantling piece 2a is deposited in the undisassembled inner cylinder lower end 1 '. It is deposited on the partition plate 3 laid on the brick demolition piece 1a. At this time, since the partition plate 3 has the elastic ring member 4b on the outer periphery thereof in close contact with the inner peripheral surface of the open end of the undisassembled inner cylinder 1, the concrete dismantling piece 2a is on the brick dismantling piece 1a side. It can be reliably deposited on the partition plate 3 without being mixed in.

解体手段20によるコンクリート製外筒2の解体作業は、図12に示すように、仕切板4上に堆積するコンクリート解体片2aの容積に見合う内容積を有する外筒2の下部2'が残存する状態となるまで行われ、しかるのち、この解体手段20を撤去する。   In the dismantling operation of the concrete outer cylinder 2 by the disassembling means 20, as shown in FIG. 12, the lower part 2 ′ of the outer cylinder 2 having an internal volume corresponding to the volume of the concrete dismantling piece 2a deposited on the partition plate 4 remains. The process is performed until the state is reached, and then the dismantling means 20 is removed.

こうして、未解体の内筒1の下端部1'内にレンガ解体片1aを堆積させ、この堆積物上に載置した仕切板4上における未解体の外筒下部2'内にコンクリート解体片2aを堆積させた状態にしたのち、この外筒下部2'の下端部外周面から内筒下端部1'の下端部内に連通する解体片排出用開口部5(図13に示す)を穿設する。この場合、未解体の内外筒部1'、2'からなる煙突下部A1の高さが低くなっているから、この開口部5を設けても強風等によって倒れる虞れが殆どなくなり、安全性を確保できる。   In this way, the brick demolition piece 1a is deposited in the lower end portion 1 ′ of the undisassembled inner cylinder 1, and the concrete demolition piece 2a is placed in the undisassembled outer cylinder lower portion 2 ′ on the partition plate 4 placed on the deposit. After the state is accumulated, a dismantling piece discharge opening 5 (shown in FIG. 13) communicating from the outer peripheral surface of the lower end portion of the outer cylinder lower portion 2 ′ to the lower end portion of the inner cylinder lower end portion 1 ′ is drilled. . In this case, since the height of the chimney lower part A1 composed of the undisassembled inner and outer cylinder parts 1 ′ and 2 ′ is low, there is almost no possibility of falling down by strong winds or the like even if the opening part 5 is provided. It can be secured.

この状態にして重機等の適宜な掻き出し手段によりこの開口部5を通じて内筒下端部1'内のレンガ解体片1aの堆積物をその下層側から外部に掻き出して排除する。この際、レンガ解体片1aが開口部5から排出されるに従って、仕切板3上のコンクリート解体片2aの堆積物がその重量により未解体の内筒下端部1'から上方に突出している未解体の外筒下部2'内を内筒下端部1'側に降下する。この際、仕切板4もその弾性リング部材4bを内筒下端部1'の内周面に上向きに屈曲させた状態で摺接させながら内筒下端部1'の下端側に向かって一体的に降下する。   In this state, the scraps of the brick demolition pieces 1a in the lower end 1 'of the inner cylinder are scraped out from the lower layer side to the outside by an appropriate scraping means such as a heavy machine. At this time, as the brick demolition piece 1a is discharged from the opening 5, the deposit of the concrete demolition piece 2a on the partition plate 3 protrudes upward from the undisassembled inner cylinder lower end 1 'by its weight. The lower part 2 ′ of the outer cylinder descends toward the lower end part 1 ′ of the inner cylinder. At this time, the partition plate 4 also integrally moves toward the lower end side of the inner cylinder lower end portion 1 ′ while sliding the elastic ring member 4b upwardly on the inner peripheral surface of the inner cylinder lower end portion 1 ′. Descent.

未解体の内筒下端部1'内のレンガ解体片1aの堆積物が全て排除されると、該仕切板3が開口部5の下端内に達し、この仕切板3を開口部5から外部に撤去したのち、コンクリート解体片2aの堆積物を上記同様にして重機等の掻き出し手段により開口部5から掻き出して排除する。こうして、未解体の煙突下部A1内に堆積しているレンガ解体片1aとコンクリート解体片2aとを別々に排除したのち、図14に示すように、空になった該煙突下部A1を構成している未解体の内筒下端部1'と外筒下部2'とを別々に解体する。   When all the deposits of the brick demolition pieces 1a in the undisassembled inner cylinder lower end portion 1 ′ are removed, the partition plate 3 reaches the lower end of the opening portion 5, and the partition plate 3 is moved from the opening portion 5 to the outside. After the removal, the deposit of the concrete demolition piece 2a is scraped and removed from the opening 5 by scraping means such as a heavy machine in the same manner as described above. Thus, after separately removing the brick demolition piece 1a and the concrete demolition piece 2a accumulated in the undemolition chimney lower part A1, as shown in FIG. 14, the empty chimney lower part A1 is configured. The undisassembled inner cylinder lower end 1 ′ and the outer cylinder lower part 2 ′ are disassembled separately.

この解体方法としては、まず、上記内筒解体手段10を用いて、未解体の内筒下端部1'を上端から下端に向かって解体して、そのレンガ解体片1aを上記開口部5から外部に排出し、次いで、上記外筒解体手段20を用いて外筒下部2'を解体してもよく、また、この外筒解体手段20を用いて未解体の内筒下端部1'から突出している未解体の外筒下部2'の上半部を解体したのち、その下半部を解体用の重機等を使用して解体したのち、未解体の内筒下端部1'を該解体用重機等を使用して解体してもよい。   As the dismantling method, first, using the inner cylinder disassembling means 10, the undisassembled inner cylinder lower end portion 1 ′ is disassembled from the upper end toward the lower end, and the brick dismantling piece 1a is externally exposed from the opening 5. Then, the outer cylinder lower part 2 ′ may be disassembled using the outer cylinder disassembling means 20, and the outer cylinder disassembling means 20 may be used to project from the undisassembled inner cylinder lower end 1 ′. After disassembling the upper half of the undisassembled outer cylinder lower part 2 ', the lower half is disassembled using a heavy machine for dismantling, etc., and then the undisassembled inner cylinder lower end 1' is disassembled Etc. may be used for dismantling.

煙突の簡略縦断正面図。The simplified longitudinal front view of the chimney. 耐火レンガ製内筒の解体手段の簡略正面図。The simplified front view of the dismantling means of the firebrick inner cylinder. 耐火レンガ製内筒を解体している状態の簡略縦断正面図。The simplified vertical front view of the state which has disassembled the firebrick inner cylinder. 耐火レンガ製内筒を下端部にまで解体した状態の簡略縦断正面図。The simple vertical front view of the state which disassembled the firebrick inner cylinder to the lower end part. 仕切板を配設した状態の簡略縦断正面図。The simplified vertical front view of the state which has arrange | positioned the partition plate. 仕切板の斜視図。The perspective view of a partition plate. その平面図。The plan view. その正面図。The front view. コンクリート製外筒の解体開始状態を示す簡略縦断正面図。The simplified longitudinal front view which shows the dismantling start state of a concrete outer cylinder. コンクリート製外筒の解体手段の簡略正面図。The simplified front view of the dismantling means of a concrete outer cylinder. コンクリート製外筒を解体している状態の簡略縦断正面図。The simplified longitudinal front view of the state which has dismantled the concrete outer cylinder. コンクリート製外筒を下部にまで解体した状態の簡略縦断正面図。The simplified vertical front view of the state which disassembled the concrete outer cylinder to the lower part. レンガ解体片を排出している状態の簡略縦断正面図。The simple longitudinal front view of the state which is discharging the brick demolition piece. 全ての堆積物を排除した状態の煙突下部の簡略縦断正面図。The simplified longitudinal front view of the lower part of the chimney of the state which excluded all the deposits.

符号の説明Explanation of symbols

A 煙突
1 耐火レンガ製内筒
1a レンガ解体片
1' 未解体の内筒下端部
2 コンクリート製外筒
2a コンクリート解体片
2' 未解体の外筒下部
3 隙間
4 仕切板
5 解体片排出用開口部
10 内筒解体手段
20 外筒解体手段
A Chimney 1 Refractory brick inner cylinder
1a brick demolition piece
1 'Lower end of undisassembled inner cylinder 2 Concrete outer cylinder
2a Concrete demolition piece
2 'lower part of undisassembled outer cylinder 3 gap 4 partition plate 5 opening for dismantling piece discharge
10 Inner cylinder disassembly means
20 Outer cylinder disassembly means

Claims (2)

コンクリート製の外筒と耐火レンガ製の内筒との二重筒からなる煙突の解体方法であって、コンクリート製の外筒を残した状態で耐火レンガ製の内筒を上端から下端部に向かって解体してそのレンガ解体片を未解体の内筒下端部内に堆積させる工程と、この堆積物の上面に仕切板を載置する工程と、この仕切板の載置後に上記コンクリート製の外筒をその上端から下部に向かって解体してそのコンクリート解体片を上記仕切板上における未解体の外筒下部内に堆積させる工程と、この外筒の下端部外周面から内筒の下端部内に連通する開口部を設けてこの開口部を通じて上記レンガ解体片の堆積物をその堆積下端側から外部に取り除く工程と、この堆積物の除去と仕切板の撤去に引き続いて上記開口部からコンクリート解体片の堆積物を外部に取り除く工程と、このコンクリート解体片の堆積物の除去後に上記未解体の内筒下端部と外筒下部とを解体、除去する工程とからなることを特徴とする煙突の解体方法。   A method of disassembling a chimney consisting of a double cylinder consisting of a concrete outer cylinder and a refractory brick inner cylinder, with the concrete outer cylinder remaining, leaving the refractory brick inner cylinder from the upper end to the lower end. Disassembling and depositing the brick dismantling pieces in the lower end of the undisassembled inner cylinder, placing the partition plate on the top surface of the deposit, and placing the partition plate on the concrete after the partition plate is placed And disassembling the concrete from the upper end to the lower part, and depositing the concrete demolition pieces in the lower part of the undisassembled outer cylinder on the partition plate, and communicating from the outer peripheral surface of the lower end of the outer cylinder into the lower end of the inner cylinder The step of removing the deposit of the brick demolition pieces from the lower end side of the deposition through the opening, and the removal of the deposit and the removal of the partition plate are followed by the opening of the concrete demolition pieces through the opening. Deposits outside Process and, disassembling method chimney, characterized in that it consists an inner cylinder lower end of the non-dismantled after removal of the deposits of the concrete demolition piece outer cylinder disassembled and lower, and removing to remove. 耐火レンガ製の内筒はその内周面を上端から下端に向かって徐々に大径に形成している一方、仕切板は外径が外筒の上端開口部よりも小径の円板部とこの円板部の外周端縁に外径が上記内筒の下端部の内径よりも大径で且つ周方向に小間隔毎に切目を介して複数の弾性可撓片に分割している弾性リング部材を取り付けてなり、この仕切板を外筒の上端開口部から吊り下ろしてその円板部を内筒解体片の堆積物の上面に載置すると共に弾性リング部材の各弾性可撓片を未解体の内筒内周面に接して上方に屈曲させていることを特徴とする請求項1に記載の煙突の解体方法。   While the inner cylinder made of refractory bricks has its inner peripheral surface gradually formed with a larger diameter from the upper end toward the lower end, the partition plate has a disk portion whose outer diameter is smaller than the upper end opening of the outer cylinder. An elastic ring member whose outer diameter is larger than the inner diameter of the lower end portion of the inner cylinder at the outer peripheral edge of the disc portion and is divided into a plurality of elastic flexible pieces via a cut in the circumferential direction at small intervals. The partition plate is suspended from the upper end opening of the outer cylinder, and the disk portion is placed on the upper surface of the deposit of the inner cylinder dismantling pieces, and each elastic flexible piece of the elastic ring member is undisassembled. The chimney disassembly method according to claim 1, wherein the chimney is bent upward in contact with the inner peripheral surface of the inner cylinder.
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JP4931650B2 (en) * 2007-03-09 2012-05-16 株式会社奥村組 Chimney dismantling system
JP4931649B2 (en) * 2007-03-09 2012-05-16 株式会社奥村組 Chimney dismantling method
JP5770571B2 (en) * 2011-09-05 2015-08-26 鹿島建設株式会社 Dismantling method of storage tank
JP7393272B2 (en) 2020-03-25 2023-12-06 株式会社奥村組 Chimney brick demolition machine

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JP2004183450A (en) * 2002-10-10 2004-07-02 Nishimatsu Constr Co Ltd Device and method for demolishing tower-like structure
JP3548565B2 (en) * 2001-12-12 2004-07-28 安藤建設株式会社 Chimney dismantling system and dismantling method for waste incineration facility
JP2005265338A (en) * 2004-03-19 2005-09-29 Okumura Corp Dismantling method and device for intra-chimney brick structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3548565B2 (en) * 2001-12-12 2004-07-28 安藤建設株式会社 Chimney dismantling system and dismantling method for waste incineration facility
JP2004183450A (en) * 2002-10-10 2004-07-02 Nishimatsu Constr Co Ltd Device and method for demolishing tower-like structure
JP2005265338A (en) * 2004-03-19 2005-09-29 Okumura Corp Dismantling method and device for intra-chimney brick structure

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