JP5970307B2 - Cutting and dismantling method and cutting and dismantling equipment for large cylindrical structures made of reinforced concrete - Google Patents

Cutting and dismantling method and cutting and dismantling equipment for large cylindrical structures made of reinforced concrete Download PDF

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JP5970307B2
JP5970307B2 JP2012202939A JP2012202939A JP5970307B2 JP 5970307 B2 JP5970307 B2 JP 5970307B2 JP 2012202939 A JP2012202939 A JP 2012202939A JP 2012202939 A JP2012202939 A JP 2012202939A JP 5970307 B2 JP5970307 B2 JP 5970307B2
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wire saw
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cylindrical structure
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鈴木 稔
稔 鈴木
高治 一彦
一彦 高治
小西 優貴夫
優貴夫 小西
田中 幸一郎
幸一郎 田中
昌宏 菅田
昌宏 菅田
星野 春夫
春夫 星野
竹広 岩田
竹広 岩田
景三郎 吉野
景三郎 吉野
藤井 悟
悟 藤井
中辻 雅之
雅之 中辻
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Japan Atomic Power Co Ltd
Takenaka Civil Engineering and Construction Co Ltd
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この発明は、例えば原子炉のペデスタル(RPVペデスタル)や遮蔽壁(原子炉遮蔽壁)、或いは大規模焼却炉施設の煙突など、鉄筋コンクリート造又はレンガ積み構造等で構築された大型筒状構造物であって、放射線量レベルが高く、或いは焼却物中の有機物質等により汚染されて、人が一定の距離・場所以上に近づくことが危険な大型筒状構造物が老朽化等した場合に、解体・撤去するため、或いは改築等するため実施する切断・解体工法と、同工法の実施に使用するワイヤーソー型切断・解体装置の技術分野に属する。   The present invention is a large cylindrical structure constructed of a reinforced concrete structure or a brick structure such as a reactor pedestal (RPV pedestal), a shielding wall (reactor shielding wall), or a chimney of a large-scale incinerator facility. When a large cylindrical structure that has a high radiation dose level or is contaminated by organic substances in incinerated materials and is dangerous for people to approach a certain distance or place becomes obsolete, etc. -It belongs to the technical field of the cutting / dismantling method to be carried out for removal or reconstruction, and the wire saw type cutting / dismantling device used for the implementation of the method.

従来、原子炉のペデスタルや遮蔽壁、或いは大規模焼却炉施設の煙突など、鉄筋コンクリート造又はレンガ積み構造等で構築された大型筒状構造物であって、高い放射線量レベルに汚染され、或いは焼却物中の有機物質等により汚染されて、人が一定の距離・場所以上に近づくことは危険な大型筒状構造物が老朽化等した場合に、それを解体・撤去するため、或いは改築等するため実施する切断・解体工法、及び同工法の実施に使用する切断・解体装置に関しては、従来、下記特許文献1、2記載の技術手段が提案されている。   Conventionally, large tubular structures constructed of reinforced concrete or brickwork, such as reactor pedestals and shielding walls, or chimneys of large-scale incinerator facilities, which are contaminated to high radiation dose levels or incinerated. It is polluted by organic substances in things, and when a person approaches more than a certain distance / location, it is necessary to dismantle / remove or remodel a dangerous large cylindrical structure, etc. Therefore, with respect to the cutting / disassembling method implemented and the cutting / disassembling apparatus used for carrying out the method, the technical means described in Patent Documents 1 and 2 below have been proposed.

先ず下記の特許文献1に開示された切断装置及び切断方法は、基本的にワイヤーソーを使用する型式である。切断装置は原子炉遮蔽壁から比較的離れた床へ固設されるとの記載(段落[0014]の1行〜2行目)が認められる。しかし、その具体的な場所や床の位置は不明である。そして、原子炉遮蔽壁に向けて床上に走行レールを敷設し、ワイヤーソーを所望の高さで走行させる柱及び支持柱の対を走行レール上に直立させて走行可能とし、少し離れた位置に、ワイヤーソーを走行させつつ前記柱及び支持柱の対を原子炉遮蔽壁に向かって前進走行させ、原子炉遮蔽壁を水平方向に輪切り状に切断し解体する切断装置及び切断方法であると説明されている。   First, the cutting device and the cutting method disclosed in Patent Document 1 below are basically a type that uses a wire saw. It is recognized that the cutting device is fixed to a floor relatively far from the reactor shielding wall (first and second lines in paragraph [0014]). However, the specific location and floor position are unknown. Then, a traveling rail is laid on the floor toward the reactor shielding wall, and a pair of pillars and supporting pillars that allow the wire saw to travel at a desired height are allowed to stand upright on the traveling rail, and can be traveled slightly apart. Explained that the cutting device and the cutting method are configured such that the pair of the column and the support column is moved forward toward the reactor shielding wall while the wire saw is traveling, and the reactor shielding wall is cut in a horizontal shape in a circular shape and disassembled. Has been.

しかし、放射線量レベルが高い原子炉遮蔽壁の近隣へ立ち入り、床上に走行レールを敷設したり、柱及び支持柱の対を走行レール上に直立させて走行可能とすること、そして、ワイヤーソーを走行させつつ、前記柱及び支持柱の対を原子炉遮蔽壁に向かって前進走行させて原子炉遮蔽壁を水平方向に輪切り状に切断し解体する作業を行う場合に、担当作業員は被曝による危険を回避できないであろうことが大いに懸念され、実施上に大きな障害があると言わねばならない。   However, entering the vicinity of the reactor shielding wall with a high radiation dose level, laying a traveling rail on the floor, or allowing a pair of pillars and support pillars to stand upright on the traveling rail, and running a wire saw When carrying out the operation of moving the pair of pillars and support pillars forward toward the reactor shielding wall while cutting and cutting the reactor shielding wall in a round shape in a horizontal direction, There is great concern that the dangers cannot be avoided and it must be said that there are major obstacles to implementation.

次に、下記の特許文献2に開示された壁構造体の切断装置及び切断・解体方法は、例えば原子炉遮蔽壁又は同様な円筒形状のコンクリート構造物の上端へ吊り込んで跨らせた切断装置で、上端部から下方に向かって順次に切断・解体を進める方法を実施する内容なので、上記の先行技術よりも作業員の被曝等に対する安全性の確保には優れている。
しかし、原子炉遮蔽壁の上端から下方に向かって順次に切断・解体を進める方法を実施する場合は、切断したコンクリート片や切断装置の構成部材、或いは周辺機材などの落下事故の心配が懸念され、事故が発生した場合の対策が難しいという問題点が指摘されている。
Next, the wall structure cutting device and the cutting / disassembling method disclosed in Patent Document 2 below are cut by suspending and straddling the upper end of, for example, a reactor shielding wall or a similar cylindrical concrete structure. Since the apparatus implements a method of sequentially cutting and dismantling from the upper end to the lower side, it is superior to the above-mentioned prior art in ensuring safety against exposure of workers.
However, when carrying out the method of cutting and disassembling sequentially from the upper end of the reactor shielding wall downward, there is a concern of falling accidents such as cut concrete pieces, cutting device components, or peripheral equipment. It has been pointed out that it is difficult to take measures when an accident occurs.

特開平8−194097号公報JP-A-8-194097 特開2012−31629号公報JP 2012-31629 A

したがって、本発明の第一の目的は、大型筒状構造物の代表例である原子炉遮蔽壁について、予めその上部を吊り支持して、放射線量レベルが高い下方の炉心近傍部分から切断・解体を進める工法と、及び前記工法の実施に使用されるワイヤーソー型切断・解体装置を提供することである。
本発明の次の目的は、原子炉に後付けした作業フロア又は先付け(既設)のダイヤフラムフロアなどを作業場(以下、作業フロアと総称する。)に利用して切断・解体の各作業を進める方法であり、前記作業フロア上へ切断・解体装置を搬入して準備し、一方、原子炉遮蔽壁は予めその上部を吊り支持せしめ、作業フロア上の切断・解体装置を安全な場所から遠隔制御により操縦して、順次に切断して解体を進める切断・解体工法と、同工法の実施に使用されるワイヤーソー型切断・解体装置を提供することである。
Therefore, the first object of the present invention is to suspend and support the upper part of a reactor shielding wall, which is a typical example of a large cylindrical structure, in advance, and to cut and dismantle from the lower core vicinity where the radiation dose level is high And a wire saw type cutting / disassembling apparatus used for carrying out the method.
The next object of the present invention is to use a work floor retrofitted to a nuclear reactor or a pre-installed (existing) diaphragm floor as a work place (hereinafter collectively referred to as a work floor) to advance each work of cutting and dismantling. Yes, prepared by bringing the cutting / dismantling device onto the work floor, while the reactor shielding wall is suspended and supported in advance, and the cutting / dismantling device on the work floor is controlled from a safe place by remote control. Then, it is providing the cutting / dismantling construction method which cuts sequentially and dismantles, and the wire saw type | mold cutting / dismantling apparatus used for implementation of the construction method.

上記課題を解決する手段として、請求項1に記載した発明に係る鉄筋コンクリート造等で成る大型筒状構造物の切断・解体工法は、
A)大型筒状構造物の上部を吊り手段により吊って支持させ、
B)平面視において前端を開放されたコ字形状をなしワイヤーソー10を周回走行させる水平なコ字形ガイド枠11を備え、ワイヤーソー10は前記開放部間を横断する配置でコ字形ガイド枠11に沿って周回走行するように駆動され、前記開放部間を横断する部分のワイヤーソー10はコ字形ガイド枠11の前方へ突き出した前向き腕部11aに沿って前後方向へ移動自在に設置した可動ガイドシーブ12aにより開放部間を前後方向へ平行移動として変位する構成とされ、コ字形ガイド枠11の後背部にワイヤーソー10を走行させる駆動部13aと張力制御部13b及び前記可動ガイドシーブ12aを移動させる機構の制御部を含む駆動制御部13を備えたワイヤーソー型切断機を、作業フロア3上を移動自在な作業車両14の前部へ、コ字形ガイド枠11が上下方向へ平行移動可能に支持させて成る切断・解体装置20を、大型筒状構造物に既設の又は後付けで用意した作業フロア3上へ搬入する段階と、
C)前記切断・解体装置20は、ワイヤーソー型切断機のコ字形ガイド枠11を前向きの水平姿勢として大型筒状構造物の外周へ押し付けるように前進させてコ字形ガイド枠11の開放部が大型筒状構造物の外周を抱持する配置とし、同コ字形ガイド枠1に沿って周回走行し前記開放部間を横断するワイヤーソー10を前向き腕部11aに沿って前方へ平行移動として変位させつつ駆動することにより、同ワイヤーソー10の高さ位置における水平切断を、大型筒状構造物の該当する周方向部分について進める工程と、
D)前記水平切断を目標位置まで進めた段階で、次にはワイヤーソー型切断機のコ字形ガイド枠11を垂直上向き又は下向き方向へ平行移動させて垂直切断を行う工程と、
E)前記垂直切断が目標位置へ到達した段階で、ワイヤーソー型切断機のワイヤーソー10を前向き腕部11aに沿って後方へ平行移動として変位させつつ駆動することで、又は作業フロア3上を移動自在な作業車両14を後方へ後退移動させることにより戻りの水平切断を進め、大型筒状構造物の一部分を切り取る工程と、
F)切り取り片は、作業フロア3上へ搬入して用意した運搬車で指定場所へ運び出して最終処分に供する処理を行い、大型筒状構造物において前記切り取り片を切り取った切除跡へ垂直ジャッキ21を設置して大型筒状構造物の下部を支持させる工程と、
G)以下、上記同様の工程を順次大型筒状構造物の周方向へ繰り返し進めて大型筒状構造物の切断・解体を行うことを特徴とする。
As a means for solving the above-mentioned problem, a cutting and dismantling method for a large cylindrical structure made of reinforced concrete according to the invention described in claim 1,
A) The upper part of the large cylindrical structure is suspended and supported by the suspension means,
B) A U-shaped guide frame 11 having a U-shape with a front end opened in a plan view and having a wire saw 10 running around the wire saw 10 is provided, and the wire saw 10 is arranged so as to cross between the open portions. The portion of the wire saw 10 that is driven so as to circulate around the open portion and traverses between the open portions is movable so as to be movable in the front-rear direction along the forward arm portion 11 a protruding forward of the U-shaped guide frame 11. The guide sheave 12a is configured to displace the open portion as a parallel movement in the front-rear direction, and the drive portion 13a, the tension control portion 13b, and the movable guide sheave 12a that run the wire saw 10 on the back portion of the U-shaped guide frame 11 are provided. A wire saw type cutting machine including a drive control unit 13 including a control unit of a mechanism to be moved is moved to the front of a work vehicle 14 that is movable on the work floor 3. The method comprising the U-shaped guide frame 11 carries a vertical direction to made by movably supported parallel cutting and demolition device 20, to a large tube-like structure to an existing or retrofitted prepared in working floor 3 above,
C) The cutting / disassembling apparatus 20 is moved forward so that the U-shaped guide frame 11 of the wire saw type cutting machine is pushed forward against the outer periphery of the large cylindrical structure in a forward horizontal posture. The wire saw 10 that runs around the U-shaped guide frame 1 and crosses between the open parts is displaced as a parallel movement forward along the forward arm 11a. By driving while making the horizontal cutting at the height position of the wire saw 10 about the corresponding circumferential portion of the large cylindrical structure,
D) at the stage where the horizontal cutting is advanced to the target position, and then performing the vertical cutting by translating the U-shaped guide frame 11 of the wire saw type cutting machine vertically upward or downward;
E) When the vertical cutting reaches the target position, the wire saw 10 of the wire saw type cutting machine is driven while being displaced as a parallel movement backward along the forward arm portion 11a, or on the work floor 3 A step of moving the movable work vehicle 14 backward to advance the horizontal cutting of the return, and cutting out a part of the large cylindrical structure;
F) The cut piece is carried onto the work floor 3 and carried to a designated place by a transported vehicle and subjected to a final disposal, and a vertical jack 21 is applied to a cut trace obtained by cutting the cut piece in a large cylindrical structure. And supporting the lower part of the large cylindrical structure,
G) Hereinafter, the same process as described above is sequentially repeated in the circumferential direction of the large cylindrical structure to cut and disassemble the large cylindrical structure.

請求項2に記載した発明は、鉄筋コンクリート造等で成る大型筒状構造物の切断・解体をマルチ手法により進める工法であって、
a)大型筒状構造物の上部を吊り手段により吊って支持させ、
b)平面視において前端を開放されたコ字形状をなしワイヤーソー10を周回走行させる水平なコ字形ガイド枠11を、少なくとも上下2段に積層する配置とし、且つ各コ字形ガイド枠11は個別に垂直方向へ平行移動可能に構成し、ワイヤーソー10は、前記各コ字形ガイド枠11の開放部間を横断する配置で各コ字形ガイド枠11に沿って周回走行するように駆動され、前記開放部間を横断する部分のワイヤーソーはコ字形ガイド枠11を形成する前向き腕部11aに沿って前後方向へ移動自在に設置した可動ガイドシーブ12aにより開放部間を前後方向へ平行移動として変位する構成とされ、各コ字形ガイド枠11の後背部にワイヤーソー10を走行させる駆動部13aと張力制御部13b及び前記可動ガイドシーブ12aを移動させる機構の制御部を含む駆動制御部13を備えた複数のワイヤーソー型切断機を、作業フロア3上を移動自在な作業車両14の前部へ、各コ字形ガイド枠11を上下方向への平行移動が自在に支持させて成るマルチ型切断・解体装置20’を、大型筒状構造物に既設の又は後付けで用意した作業フロア3上へ搬入する段階と、
c)前記マルチ型切断・解体装置20’は、各ワイヤーソー型切断機のコ字形ガイド枠11の開放部を前向きとした水平姿勢とし、且つ各コ字形ガイド枠11間の垂直方向の間隔を切断片の切り取り高さに設定した状態で大型筒状構造物の外周へ押し付けるように前進させ、各コ字形ガイド枠11の開放部が大型筒状構造物の外周を抱持する配置とし、同コ字形ガイド枠11に沿って周回走行し前記開放部間を横断するワイヤーソー10を可動ガイドシーブ12aにより前向き腕部11aに沿って前方へ平行移動として変位させつつ駆動して、各ワイヤーソー10の高さ位置における複数層の水平切断を、大型筒状構造物の該当する円周部分について進める工程と、
d)前記の水平切断を目標位置まで進めた段階で、次にはワイヤーソー型切断機のコ各字形ガイド枠11を垂直上向き又は下向き方向へ平行移動させて垂直切断を行う工程と、
e)前記垂直切断が目標の位置へ到達した段階で、各ワイヤーソー型切断機のワイヤーソー10を前向き腕部11aに沿って後方へ平行移動として変位させつつ駆動することで、又は作業フロア3上を移動自在な作業車両14を後方へ後退移動させることにより戻りの水平切断を進めて大型筒状構造物の複数箇所を切り取る工程と、
f)切り取り片は、作業フロア3上へ搬入して用意した運搬車で指定場所へ運び出して最終処分に供する処理を行い、大型筒状構造物において前記切り取り片を切り取った切除跡へ垂直ジャッキ21を設置して大型筒状構造物の下部を支持させる工程と、
g)以下、上記同様の工程を順次大型筒状構造物の周方向へ繰り返し進めて大型筒状構造物の切断・解体を行うことを特徴とする。
The invention described in claim 2 is a construction method in which cutting and dismantling of a large cylindrical structure made of reinforced concrete is advanced by a multi-method,
a) The upper part of the large cylindrical structure is suspended and supported by the suspension means,
b) A horizontal U-shaped guide frame 11 having a U-shape with a front end opened in plan view and running around the wire saw 10 is arranged in at least two upper and lower layers, and each U-shaped guide frame 11 is individually provided. The wire saw 10 is driven so as to circulate along each U-shaped guide frame 11 in an arrangement crossing between the open portions of the respective U-shaped guide frames 11, The wire saw that crosses between the open parts is displaced as a parallel movement between the open parts in the front-rear direction by a movable guide sheave 12a that is movably installed in the front-rear direction along the forward arm 11a that forms the U-shaped guide frame 11. The drive unit 13a, the tension control unit 13b, and the movable guide sheave 12a for moving the wire saw 10 to the back of each U-shaped guide frame 11 are moved. A plurality of wire saw-type cutting machines including a drive control unit 13 including a control unit for the mechanism to be moved to the front part of the work vehicle 14 movable on the work floor 3, and each U-shaped guide frame 11 in the vertical direction. A step of carrying a multi-type cutting / disassembling apparatus 20 ′, which is supported by a parallel movement, onto a work floor 3 which is already installed in a large cylindrical structure or prepared later;
c) The multi-type cutting / disassembling apparatus 20 ′ has a horizontal posture with the open portion of the U-shaped guide frame 11 of each wire saw type cutting machine facing forward, and the vertical interval between the U-shaped guide frames 11 is set. With the cutting height of the cut piece set, it is advanced so as to be pressed against the outer periphery of the large cylindrical structure, and the opening portion of each U-shaped guide frame 11 is arranged to hold the outer periphery of the large cylindrical structure. The wire saw 10 that runs around the U-shaped guide frame 11 and traverses between the open portions is driven by the movable guide sheave 12a while being displaced as a parallel movement forward along the forward arm portion 11a. A step of horizontally cutting a plurality of layers at a height position of the corresponding circumferential portion of the large cylindrical structure;
d) at the stage where the horizontal cutting is advanced to the target position, and then performing the vertical cutting by translating the U-shaped guide frame 11 of the wire saw type cutting machine vertically upward or downward; and
e) When the vertical cutting reaches the target position, the wire saw 10 of each wire saw type cutting machine is driven while being displaced as a parallel movement backward along the forward arm 11a, or the work floor 3 A step of moving the work vehicle 14 freely movable backward to advance backward horizontal cutting to cut out a plurality of locations of the large cylindrical structure;
f) The cut piece is carried onto the work floor 3 and carried out to a designated place by a transported vehicle and subjected to final disposal, and the vertical jack 21 is cut to the cut trace obtained by cutting the cut piece in a large cylindrical structure. And supporting the lower part of the large cylindrical structure,
g) In the following, the above-described steps are sequentially repeated in the circumferential direction of the large cylindrical structure to cut and disassemble the large cylindrical structure.

請求項3に記載した発明は、請求項1又は2に記載した鉄筋コンクリート造等で成る大型筒状構造物の切断・解体工法において、
大型筒状構造物の切断・解体の工程が周方向へ一周分進んだ段階で、同大型筒状構造物の上部を吊って支持させた吊り手段及び同大型筒状構造物の下端部を支持する垂直ジャッキ21を操作して、上記切り取り片の高さ相当分だけ下降させ、その下端部を垂直ジャッキ21で支持させた後に、上記の切断工程を順次周方向へ進めて大型筒状構造物の切断・解体を行うことを特徴とする。
請求項4に記載した発明は、請求項1又は2に記載した鉄筋コンクリート造等で成る大型筒状構造物の切断・解体工法において、
大型筒状構造物の下端部を支持する垂直ジャッキ21は大型筒状構造物へ後付けで構築した作業フロア3の特定位置へ予め組み込んで設備し、必要に応じて作業フロア3の床面から起立させる駆動制御を行って大型筒状構造物の下端部を支持させることを特徴とする。
The invention described in claim 3 is a method of cutting and dismantling a large cylindrical structure made of reinforced concrete or the like described in claim 1 or 2,
At the stage where the cutting and dismantling process of the large cylindrical structure has advanced one round in the circumferential direction, the suspension means for supporting the upper portion of the large cylindrical structure by suspending it and the lower end of the large cylindrical structure are supported. The vertical jack 21 is operated and lowered by an amount corresponding to the height of the cut piece, and the lower end portion thereof is supported by the vertical jack 21, and then the cutting process is sequentially advanced in the circumferential direction so that a large cylindrical structure is obtained. It is characterized by cutting and disassembling.
The invention described in claim 4 is a method for cutting and dismantling a large cylindrical structure made of reinforced concrete or the like according to claim 1 or 2,
The vertical jack 21 that supports the lower end portion of the large cylindrical structure is installed in advance in a specific position of the work floor 3 that is constructed retrofitted to the large cylindrical structure, and stands up from the floor of the work floor 3 as necessary. The driving control is performed to support the lower end of the large cylindrical structure.

請求項5に記載した発明に係る鉄筋コンクリート造等で成る大型筒状構造物の切断・解体装置は、
イ)大型筒状構造物の作業フロア3上の位置で、同大型筒状構造物を切断・解体するワイヤーソー型切断・解体装置であって、
ロ)平面視において前端を開放されたコ字形状をなしワイヤーソー10を周回走行させる水平なコ字形ガイド枠11を備え、ワイヤーソー10は前記開放部間を横断する配置でコ字形ガイド枠11に沿って周回走行するように駆動され、前記開放部間を横断する部分のワイヤーソー10はコ字形ガイド枠11を形成する前向き腕部11aに沿って前後方向へ移動自在に設置した可動ガイドシーブ12aにより開放部間を前後方向へ平行移動として変位する構成とされており、同コ字形ガイド枠11の後背部に、ワイヤーソー10を走行させる駆動部13aと張力制御部13b及び前記可動ガイドシーブ12aを移動させる機構の制御部を含む駆動制御部13を備えたワイヤーソー型切断機が、前記作業フロア3上を移動自在な作業車両14の前部へ、前記コ字形ガイド枠11が上下方向への平行移動が自在に支持されており、
ハ)前記ワイヤーソー型切断機の駆動制御部13及び作業車両14は遠隔制御による操縦が可能に構成されており、
ニ)大型筒状構造物の作業フロア3上へ搬入され、前記ワイヤーソー型切断機のコ字形ガイド枠11の開放部を前向きとした水平姿勢で大型筒状構造物に向かって押し付けるように前進させ、同コ字形ガイド枠11の開放部が大型筒状構造物の外周を抱持する配置として、同コ字形ガイド枠11の開放部間を横断するワイヤーソー10を前向き腕部11aに沿って移動する可動ガイドシーブ12aにより前方へ平行移動として変位させつつ駆動することで水平切断を進め、コ字形ガイド枠11を垂直上向き又は下向き方向へ平行移動させることで垂直切断を行い、更にワイヤーソー10を前向き腕部11aに沿って後方へ平行移動として変位させつつ駆動すること、又は作業フロア3上を移動自在な作業車両14を後方へ後退移動させることにより戻りの水平切断を進めて大型筒状構造物の切断・解体を行う構成であることを特徴とする。
A cutting / disassembling apparatus for a large cylindrical structure made of reinforced concrete according to the invention described in claim 5,
B) A wire saw type cutting / disassembling device for cutting / disassembling the large cylindrical structure at a position on the work floor 3 of the large cylindrical structure,
(B) A U-shaped guide frame 11 having a U-shape with an open front end in a plan view and having the wire saw 10 run around is provided, and the wire saw 10 is arranged so as to cross between the open portions. The movable part of the wire saw 10 that is driven so as to circulate along the open part and that moves across the open part is movably installed in the front-rear direction along the forward-facing arm part 11 a that forms the U-shaped guide frame 11. 12a is configured to be displaced as a parallel movement in the front-rear direction between the open portions, and on the rear portion of the U-shaped guide frame 11, the drive unit 13a, the tension control unit 13b, and the movable guide sheave that run the wire saw 10 are moved. A wire saw type cutting machine having a drive control unit 13 including a control unit of a mechanism for moving 12a is used for a work vehicle 14 that is movable on the work floor 3. To part, the U-shaped guide frame 11 has parallel movement is supported freely in the vertical direction,
C) The drive control unit 13 and the work vehicle 14 of the wire saw type cutting machine are configured to be capable of being controlled by remote control.
D) The large cylindrical structure is carried onto the work floor 3 and moved forward so as to press toward the large cylindrical structure in a horizontal posture with the open portion of the U-shaped guide frame 11 of the wire saw type cutting machine facing forward. The wire saw 10 that crosses between the open portions of the U-shaped guide frame 11 is disposed along the forward arm portion 11a so that the open portion of the U-shaped guide frame 11 holds the outer periphery of the large cylindrical structure. The horizontal cutting is advanced by driving the movable guide sheave 12a to be moved as a parallel movement by the movable guide sheave 12a. The U-shaped guide frame 11 is vertically cut by moving the U-shaped guide frame 11 vertically upward or downward. Is driven while being displaced as a parallel movement backward along the forward arm 11a, or the work vehicle 14 movable on the work floor 3 is moved backward. Characterized in that it is configured to perform cutting and dismantling of large tubular structures promote more return horizontal cutting.

請求項6に記載した発明に係るコンクリート造等で成る大型筒状構造物のマルチ型切断・解体装置は、
イ’)大型筒状構造物の作業フロア3上の位置で、同大型筒状構造物をマルチ手法にて切断・解体するワイヤーソー型切断・解体装置であって、
ロ’)平面視において前端を開放されたコ字形状をなしワイヤーソー10を周回走行させるコ字形ガイド枠11を水平姿勢で少なくとも上下2段に積層した配置とし、且つ各コ字形ガイド枠11は個別に垂直方向へ平行移動可能な構成で備えており、ワイヤーソー10は、前記の各コ字形ガイド枠11の開放部間を横断する配置で、同コ字形ガイド枠11に沿って周回走行するように駆動され、前記開放部間を横断する部分のワイヤーソー10はコ字形ガイド枠11を形成する前向き腕部11aに沿って前後方向へ移動自在に設置した可動ガイドシーブ12aにより開放部間を前後方向へ平行移動として変位する構成とされており、各コ字形ガイド枠11の後背部にそれぞれ、ワイヤーソー10を走行させる駆動部13aと張力制御部13b及び前記可動ガイドシーブ12aを移動させる機構の制御部を含む駆動制御部13を備えた少なくとも上下2段のワイヤーソー型切断機が、前記作業フロア3上を移動自在な作業車両14の前部へ、各コ字形ガイド枠11が個別に上下方向への平行移動が自在に支持されており、
ハ’)前記ワイヤーソー型切断機の駆動制御部13及び作業車両14は遠隔制御による操縦が可能に構成されており、
ニ’)大型筒状構造物の作業フロア3上へ搬入され、前記ワイヤーソー型切断機の各コ字形ガイド枠11の開放部を前向きとした水平姿勢で大型筒状構造物に向かって押し付けるように前進させ、各コ字形ガイド枠11の開放部が大型筒状構造物の外周を抱持する配置とし、同コ字形ガイド枠11の開放部間を横断するワイヤーソー10を前向き腕部11aに沿って移動する可動ガイドシーブ12aにより前方へ平行移動として変位させつつ駆動することで水平切断を進め、次いで各コ字形ガイド枠11を垂直上向き又は下向き方向へ平行移動させることで垂直切断を行い、更にワイヤーソー10を前向き腕部11aに沿って後方へ変位させつつ駆動することで、又は作業フロア3上を移動自在な作業車両14を後方へ後退移動させることにより戻りの水平切断を進めて、大型筒状構造物の切断・解体を行うことを特徴とする。
A multi-type cutting / disassembling apparatus for a large cylindrical structure made of concrete or the like according to the invention described in claim 6 is:
B) A wire saw type cutting / disassembling device for cutting / disassembling the large cylindrical structure by a multi-method at a position on the work floor 3 of the large cylindrical structure,
B) A U-shaped guide frame 11 having a U-shape with an open front end in a plan view and having the wire saw 10 run around is arranged in a horizontal posture in at least two upper and lower layers, and each U-shaped guide frame 11 is The wire saw 10 is arranged so as to be individually movable in the vertical direction, and the wire saw 10 travels around the U-shaped guide frame 11 in an arrangement crossing between the open portions of the U-shaped guide frames 11. The portion of the wire saw 10 that crosses between the open portions is driven between the open portions by a movable guide sheave 12a that is movably installed in the front-rear direction along a forward arm portion 11a that forms a U-shaped guide frame 11. It is configured to be displaced as a parallel movement in the front-rear direction, and a drive unit 13a, a tension control unit 13b, and the like that run the wire saw 10 on the back of each U-shaped guide frame 11, respectively. And at least two upper and lower wire saw-type cutting machines including a drive control unit 13 including a control unit for a mechanism for moving the movable guide sheave 12a, to the front of the work vehicle 14 movable on the work floor 3. , Each U-shaped guide frame 11 is individually supported so as to freely move in the vertical direction,
C) The drive control unit 13 and the work vehicle 14 of the wire saw type cutting machine are configured so that they can be controlled by remote control.
D ') It is carried onto the work floor 3 of the large cylindrical structure, and is pressed toward the large cylindrical structure in a horizontal posture with the open portion of each U-shaped guide frame 11 of the wire saw type cutting machine facing forward. The open portion of each U-shaped guide frame 11 is arranged to hold the outer periphery of the large cylindrical structure, and the wire saw 10 that traverses between the open portions of the U-shaped guide frame 11 is used as the forward arm portion 11a. The horizontal cutting is carried out by driving the movable guide sheave 12a moving along with the displacement as a parallel movement forward, and then the U-shaped guide frame 11 is moved in the vertical upward or downward direction to perform vertical cutting. Further, the wire saw 10 is driven while being displaced rearward along the forward arm 11a, or the work vehicle 14 that is movable on the work floor 3 is moved backwardly. It is characterized by cutting back and cutting a large cylindrical structure by proceeding with horizontal cutting.

請求項1〜4に記載した発明に係る切断・解体工法によれば、大型筒状構造物が例えば高い放射線量レベルで汚染された原子炉のペデスタル4(RPVペデスタル)や遮蔽壁2(原子炉遮蔽壁)、或いは焼却物中の有機物質等により高濃度に汚染された大規模焼却炉施設の煙突など、人が一定の距離・場所以上に近づくことが危険な鉄筋コンクリート造又はレンガ積み等の大型筒状構造物であっても、その切断・解体は、請求項5又は6に記載した切断・解体装置20又は20’を、人に安全な例えば生体遮蔽壁1の外部位置で予め組み立て、直ちに使用可能な状態に完成して作業フロア3上へ搬入することで、前記大型筒状構造物の切断・解体の作業を安全に効率よく進めることができる。
前記切断・解体装置20又は20’は、人に安全な場所、例えば生体遮蔽壁1の外部からの遠隔操縦により運転できるので、その分作業員は放射線による被曝を受ける危険、或いは有機物質等に汚染する被害を受ける危険を回避した安全作業を進められる。
しかも切断・解体装置20による大型筒状構造物の切断・解体工法の手順は、作業車両14の前進と後退及び転回と、ワイヤーソー型切断機を構成するコ字形ガイド枠11の開放部間を横断するワイヤーソー10を、前向き腕部11aに沿って前後方向へ平行移動として変位させつつ駆動する水平切断と、及びコ字形ガイド枠11を垂直上向き又は下向き方向へ平行移動させる垂直切断との組み合わせで実施できるので、遠隔操縦が容易であり、切断・解体の作業を効率よく進めることができる。
大型筒状構造物を切断した切り取り片は、およそドーナツの切断形状になる(形成できる)ので、その把持及び運搬は、作業フロア上を走行するように用意した運搬車(フォークリフト車など)の遠隔制御により容易に効率よく行うことができ、指定場所へ運び出す作業も容易である。
その上、本発明による切断・解体工法によれば、切り取り片、或いは同工法の実施に使用する切断・解体装置20又は20’自体や同装置に用いる各種の機械部品(付属品)等が不用意に落下する事故の心配がない。また仮に、それらが落下しても、せいぜい作業フロア3上へ落下して止まるにすぎないから、その回収や修復の作業も極めて容易に安全な作業内容で進めることができる。
According to the cutting and dismantling method according to the first to fourth aspects of the present invention, a pedestal 4 (RPV pedestal) or a shielding wall 2 (reactor) of a nuclear reactor in which a large cylindrical structure is contaminated, for example, at a high radiation dose level. Large-scale buildings such as reinforced concrete or brick masonry where it is dangerous for people to approach a certain distance or place, such as a chimney of a large-scale incinerator facility that is highly contaminated with organic substances in the incinerated materials) Even in the case of a cylindrical structure, the cutting / disassembling is performed by assembling the cutting / disassembling device 20 or 20 'according to claim 5 or 6 in advance at a position safe for humans, for example, outside the biological shielding wall 1 and immediately. By completing it in a usable state and carrying it onto the work floor 3, it is possible to safely and efficiently proceed with the work of cutting and dismantling the large cylindrical structure.
Since the cutting / disassembling apparatus 20 or 20 ′ can be operated by a remote control from the outside of the living body shielding wall 1, for example, a worker can be exposed to radiation exposure or an organic substance. Safety work that avoids the risk of contamination damage can be promoted.
Moreover, the procedure of the cutting / disassembling method of the large cylindrical structure by the cutting / disassembling apparatus 20 is performed between the forward and backward movements of the work vehicle 14 and the open portion of the U-shaped guide frame 11 constituting the wire saw type cutting machine. A combination of horizontal cutting for driving the wire saw 10 traversing while being displaced as a parallel movement in the front-rear direction along the forward arm portion 11a, and vertical cutting for translating the U-shaped guide frame 11 vertically upward or downward. Therefore, remote control is easy, and cutting and dismantling can be performed efficiently.
A cut piece obtained by cutting a large cylindrical structure has a donut cut shape (can be formed), so that the gripping and transporting can be performed remotely from a transport vehicle (such as a forklift truck) prepared to run on the work floor. It can be performed easily and efficiently by the control, and the work to carry out to the designated place is also easy.
Moreover, according to the cutting / disassembling method of the present invention, there is no cut piece, or the cutting / disassembling device 20 or 20 ′ itself used for carrying out the method or various machine parts (accessories) used in the device. There is no worry about accidental falling. Also, even if they fall, they are only dropped on the work floor 3 and stopped, so that the recovery and repair work can be carried out very easily with safe work contents.

次に、請求項5、6に記載した発明に係る切断・解体装置20又は20’は、特殊な機構や部品を必要とせず、いうなれば既知の又は既存の器具や機構、車両等の寄せ集めたに等しい簡易な構成であり、小型で安価に実施できる。小型であるため組み立て・解体の手間が少なくて済み、作業スペースも比較的小さくて済むから、使い勝手が良い。
また、作業車両14の前部へワイヤーソー型切断機を取り付けた、いわゆる自立移動が可能な安定な構成であるから、遠隔操縦に適し、作業員の被曝や二次被曝等の危険を大幅に軽減化でき、使い勝手が良い。修理や交換などの手間も少なくて済むものである。
Next, the cutting / disassembling apparatus 20 or 20 'according to the invention described in claims 5 and 6 does not require a special mechanism or part, in other words, a known or existing instrument or mechanism, a vehicle, etc. It is a simple structure equal to the above, and is small and can be implemented at low cost. The small size requires less labor for assembly and disassembly, and the work space is relatively small, making it easy to use.
In addition, a wire saw type cutting machine attached to the front part of the work vehicle 14 is a stable configuration capable of so-called self-sustained movement, which is suitable for remote control and greatly increases the risk of worker exposure and secondary exposure. It can be reduced and is easy to use. There is little need for repairs and replacements.

A〜Dは本発明による切断・解体装置の実施例1を正面方向から見た斜視図と、同切断・解体装置の主要機構を同じ視点で示した機構図、及び平面図と側面図である。1A to 1D are a perspective view of a cutting / disassembling apparatus according to a first embodiment of the present invention as viewed from the front, a mechanical view showing the main mechanism of the cutting / disassembling apparatus from the same viewpoint, and a plan view and a side view. . A、Bは本発明による切断・解体装置の実施例2を正面方向から見た斜視図と、側面図である。A and B are a perspective view and a side view of a cutting / disassembling apparatus according to a second embodiment of the present invention as viewed from the front. A〜Dは上記実施例1の切断・解体装置により原子炉遮蔽壁を切断し解体する手順を概念的に示した斜視図である。AD is the perspective view which showed notionally the procedure which cut | disconnects a nuclear reactor shielding wall by the cutting / disassembly apparatus of the said Example 1, and disassembles. A、Bは原子炉遮蔽壁を実施例1の切断・解体装置により切断し解体する態様を概念的に示した斜視図である。A and B are perspective views conceptually showing an aspect in which a reactor shielding wall is cut and disassembled by the cutting / disassembling apparatus of the first embodiment. A、Bは原子炉遮蔽壁を切断した切断跡の事例を示した平面図と上向きの斜視図である。A and B are the top view and the upward perspective view which showed the example of the cutting trace which cut | disconnected the nuclear reactor shielding wall. 原子炉遮蔽壁を吊り支持する手段、及び後付けで構築した作業フロアへ垂直ジャッキを組み込んだ構造例を概念的に示した斜視図である。It is the perspective view which showed notionally the structural example which incorporated the vertical jack in the work floor constructed | assembled by the means to suspend and support a reactor shielding wall, and retrofitting. A、Bは後付けで構築した作業フロアへ一体的に組み込んだ垂直ジャッキの平面的配置と、一部の垂直ジャッキの稼働状況を象徴的に示した斜視図である。FIGS. 7A and 7B are perspective views symbolically showing a planar arrangement of vertical jacks integrated into a work floor constructed as a retrofit, and an operating state of some vertical jacks. FIGS. 大型焼却炉の煙突を地上レベルにおいて本発明の切断・解体装置により切断し解体する実施例を概念的に示した立面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view conceptually showing an embodiment in which a chimney of a large incinerator is cut and disassembled at the ground level by the cutting / disassembling apparatus of the present invention. 大型焼却炉の煙突を高所レベルにおいて本発明の切断・解体装置により切断し解体する実施例を概念的に示した立面図である。1 is an elevational view conceptually showing an embodiment in which a chimney of a large incinerator is cut and disassembled at a high level by the cutting / disassembling apparatus of the present invention.

以下に、本発明を図示した実施例に基づいて説明する。
先ず図6は、切断・解体の対象物である大型筒状構造物の一例として、大規模原子炉における原子炉圧力容器から燃料棒を取り出し、更に原子炉圧力容器も除去した後に、生体遮蔽壁1に囲まれた筒状の原子炉遮蔽壁2の下部を、例えば以下に説明する本発明の切断・解体工法で切断・解体するにあたり、同原子炉遮蔽壁2の上端部を吊り持ち支持させる手段の実施態様を概念的に示している。
併せて図6は、原子炉遮蔽壁2の下部外周であって生体遮蔽壁1の内側部位に、作業床に利用できる例えば先付けのダイヤフラムフロアなどが存在する場合にはそれを作業フロア3に利用する。しかし、前記の存在がない場合には、後付けの作業フロア3を構築して用いる例を示している。後者の場合には、原子炉遮蔽壁2の下部を支持する垂直ジャッキ21を、同作業フロア3の構造中へ予め一体的に組み込み、必要に応じてその垂直ジャッキ21を床面から起立させて原子炉遮蔽壁2の下端部を支持させた稼働状態と、及び無用の時は作業フロア3の床面より以下に沈み込ませて非稼働状態とする場合を、それぞれ概念的に示している。
因みに、図6中の符号21は、作業フロア3の床面から起立させて原子炉遮蔽壁2の下端部を支持させた稼働動状態の垂直ジャッキ群を指している。一方、符号21’は、作業フロア3の床面より以下に沈み込ませて、作業フロア3の床面上を移動する人や物品類の動き邪魔とならないようにした非稼働動状態の垂直ジャッキ群を指している。
図6に示す実施例の場合、生体遮蔽壁1の上部(頭部)を遮蔽するウエルプラグは既に撤去されている。オペレーティングフロアの図示は省略した。図中の符号4はペデスタル(RPVペデスタル)を指している。
本発明の切断・解体工法は、切断対象の大型筒状構造物である原子炉遮蔽壁2の上部を吊り手段により吊り支持させた状態で、その下方部分を順次に切断して解体する工程を特徴としている。
したがって、本発明による原子炉遮蔽壁2の切断・解体工法は、作業フロア3上のレベルのみにおいて、切断・解体工程の全ハンドリングを行え、作業レベルの変更を格別必要としないことも有利な特徴点に挙げることができる。
Hereinafter, the present invention will be described based on illustrated embodiments.
First, FIG. 6 shows an example of a large cylindrical structure that is an object to be cut and disassembled. After removing a fuel rod from a reactor pressure vessel in a large-scale nuclear reactor and further removing the reactor pressure vessel, For example, when the lower part of the cylindrical reactor shielding wall 2 surrounded by 1 is cut / disassembled by the cutting / disassembling method of the present invention described below, the upper end portion of the reactor shielding wall 2 is suspended and supported. The embodiment of the means is shown conceptually.
In addition, FIG. 6 shows a case where a front diaphragm floor or the like that can be used as a work floor is present in the lower outer periphery of the reactor shielding wall 2 and inside the living body shielding wall 1. To do. However, in the case where there is no such presence, an example is shown in which a retrofitted work floor 3 is constructed and used. In the latter case, the vertical jack 21 that supports the lower part of the reactor shielding wall 2 is integrated in advance into the structure of the work floor 3 and, if necessary, the vertical jack 21 is raised from the floor surface. An operation state in which the lower end portion of the reactor shielding wall 2 is supported and a case in which the reactor shield wall 2 is submerged below the floor surface of the work floor 3 when not in use are conceptually shown.
Incidentally, reference numeral 21 in FIG. 6 indicates a group of vertical jacks in an operating state in which the lower end portion of the reactor shielding wall 2 is supported by standing from the floor surface of the work floor 3. On the other hand, reference numeral 21 ′ denotes a vertical jack in a non-operating state in which it is sunk below the floor surface of the work floor 3 so as not to obstruct the movement of people and articles moving on the floor surface of the work floor 3. Point to a group.
In the case of the embodiment shown in FIG. 6, the well plug that shields the upper part (head) of the biological shielding wall 1 has already been removed. Illustration of the operating floor is omitted. Reference numeral 4 in the figure indicates a pedestal (RPV pedestal).
The cutting / disassembling method of the present invention includes a step of sequentially cutting and disassembling the lower part in a state where the upper part of the reactor shielding wall 2 which is a large cylindrical structure to be cut is suspended and supported by the hanging means. It is a feature.
Therefore, the cutting and dismantling method for the reactor shielding wall 2 according to the present invention is advantageous in that it can handle all cutting and dismantling processes only on the level of the work floor 3 and does not require any special change in the work level. Can be mentioned.

ここで上記の作業フロア3中に一体的に組み込まれた垂直ジャッキ21の構造、機能について、図7A、Bに簡略化して示したので、これに基づき更に説明を行う。
図7Aは、作業フロア3における上記垂直ジャッキ21の平面的配置及び台数の一例を非稼働状態で示している。原子炉遮蔽壁2を中心とした放射状の配置とし、しかも図7Bに示す稼働状態の姿勢を前提に、必要数の垂直ジャッキ21が作業フロア3の構造中に一体的に組み込まれている。図7Bでは、後述するように原子炉遮蔽壁2の円周を6等分した各位置のうち、1箇所おきの合計3箇所の位置を2基ずつの垂直ジャッキ21で原子炉遮蔽壁2の切断下端部を支持させた状況を例示している。したがって、図7A中に例示する垂直ジャッキ21の総数は、12基ということになる。
ちなみに図7Bから類推可能であるように、各垂直ジャッキ21は、1本の台柱21aが伸縮動作をして稼働状態に起立され、或いは逆に作業フロア3の床面レベル以下まで非稼働状態に沈み込む構成とされている。また、稼働状態に起立された垂直ジャッキ21の水平な本体部は、その前部の支持主体部21bが原子炉遮蔽壁2の中心方向へ伸張動作して、原子炉遮蔽壁2の切断下端部を支持する構成とされている。そのため作業フロア3の床面には、垂直ジャッキ21の水平な支持主体部21bを床面レベルに沈み込ませる凹嵌部3aが設けられているが、その詳細な図示は省略した。
Here, since the structure and function of the vertical jack 21 integrally incorporated in the work floor 3 are shown in a simplified manner in FIGS. 7A and 7B, further description will be given based on this.
FIG. 7A shows an example of the planar arrangement and number of the vertical jacks 21 on the work floor 3 in a non-operating state. A required number of vertical jacks 21 are integrally incorporated in the structure of the work floor 3 on the premise of the operation posture shown in FIG. 7B in a radial arrangement centering on the reactor shielding wall 2. In FIG. 7B, as will be described later, among the positions obtained by dividing the circumference of the reactor shielding wall 2 into six equal parts, a total of three positions at every other place are separated by two vertical jacks 21 of the reactor shielding wall 2. The situation which supported the cutting lower end part is illustrated. Therefore, the total number of vertical jacks 21 illustrated in FIG. 7A is 12.
Incidentally, as can be inferred from FIG. 7B, each vertical jack 21 is erected in an operating state with one pedestal 21 a extending and contracting, or conversely, in a non-operating state up to the floor level of the work floor 3. It is designed to sink. Further, the horizontal main body portion of the vertical jack 21 erected in the operating state is such that the support main body portion 21b of the front portion extends and moves toward the center of the reactor shielding wall 2 so that the lower end portion of the reactor shielding wall 2 is cut. It is set as the structure which supports. Therefore, the floor surface of the work floor 3 is provided with a recessed fitting portion 3a for sinking the horizontal support main body portion 21b of the vertical jack 21 to the floor surface level, but the detailed illustration thereof is omitted.

次に、図6に例示した吊り手段について説明する。
原子炉遮蔽壁2の大きさ、規模は大小様々であるが、一例を示すと外径が8m程度、壁厚は60〜80cm程度の規模である。
図6に示した吊り具5は、原子炉遮蔽壁2の円周を6等分した位置にそれぞれ跨らせた鞍形部材を基本単位として構成されている。各鞍形部材の内側面部(又は外側部でも可)に、具体的図示を省略したドリル軸を回転駆動しつつ半径方向外向きに送り、原子炉遮蔽壁2を掘進して貫通させ、最終的には前記鞍形部材の反対側へ到達させて、両端支持の掴み状態を実現する穿孔型グリップ機構5aが設置されている。更に、各鞍形部材の上面部に吊り用環材5bが設けられている。この吊り用環材5bへ、図示を省略した天井クレーン等から下ろしたワイヤー6を連結して吊る吊り手段が構成されている。
因みに、天井クレーン等は、図示を省略したオペレーティングフロアの上部などに、原子炉の操業に必須の設備器具として設置されたものを利用することができる。
もっとも、吊り手段は、上記の構成に限らない。現場の状況や、周辺に存在する機械、器具類に応じて適宜に選択し利用すればよい。
Next, the suspension means illustrated in FIG. 6 will be described.
The reactor shielding wall 2 has various sizes and scales. For example, the outer diameter is about 8 m and the wall thickness is about 60 to 80 cm.
The hanging tool 5 shown in FIG. 6 is configured with a saddle-shaped member straddling a position obtained by dividing the circumference of the reactor shielding wall 2 into six equal parts as a basic unit. A drill shaft (not shown) is sent to the inner side surface (or the outer side) of each saddle-shaped member while being driven to rotate outward in the radial direction, and the reactor shielding wall 2 is dug and penetrated. Is provided with a perforated grip mechanism 5a that reaches the opposite side of the saddle-shaped member and realizes a gripping state supported at both ends. Further, a suspension ring member 5b is provided on the upper surface of each bowl-shaped member. A suspension means for suspending the suspension ring 5b by connecting a wire 6 lowered from an overhead crane (not shown) to the suspension ring 5b is configured.
Incidentally, the overhead crane or the like can be used that is installed as an indispensable equipment for the operation of the nuclear reactor on the upper part of the operating floor (not shown).
However, the suspension means is not limited to the above configuration. What is necessary is just to select and use suitably according to the condition of the field, the machine and instruments which exist in the circumference.

上記した吊り手段により上部を吊って支持された原子炉遮蔽壁2の切断・解体は、下記構成の切断・解体装置20を、以下に説明するように使用して実施される。
先ず請求項5に記載した発明に係る切断・解体装置20の実施例1を、主に図1A〜Dに基づいて説明する。
この切断・解体装置20は、図1Cに平面視を示したとおり、前端を広い間口に開放されたコ字形状とされ、ワイヤーソー10を周回走行さるコ字形ガイド枠11を水平な配置に備えている。因みにこのコ字形ガイド枠11は、上記のように外径が8mにも及ぶ原子炉遮蔽壁2の外周の一部分を、図3に例示した形に抱持するのに適した縦、横寸法の規模に形成されている。
使用するワイヤーソー10は公知、既知の構造で成り、上記コ字形ガイド枠11の開放部間を横断する配置とされ、コ字形ガイド枠11に沿って周回走行するように、例えば図1Bに主な配置例を示した各ガイドシーブ12及び12aに案内されて走行する構成とされている。
The cutting / disassembling of the reactor shielding wall 2 supported by hanging the upper portion by the above-described suspending means is performed using the cutting / disassembling apparatus 20 having the following configuration as described below.
First, a first embodiment of the cutting / disassembling apparatus 20 according to the invention described in claim 5 will be described mainly based on FIGS.
As shown in a plan view in FIG. 1C, the cutting / disassembling apparatus 20 has a U-shaped guide frame 11 having a front end opened to a wide front and running around the wire saw 10 in a horizontal arrangement. ing. Incidentally, the U-shaped guide frame 11 has vertical and horizontal dimensions suitable for holding a part of the outer periphery of the reactor shielding wall 2 having an outer diameter of 8 m as described above in the shape illustrated in FIG. It is formed on a scale.
The wire saw 10 to be used has a known and known structure, and is arranged so as to cross between the open portions of the U-shaped guide frame 11. It is set as the structure which guides and guides each guide sheave 12 and 12a which showed the example of arrangement | positioning.

コ字形ガイド枠11の前記開放部間を横断する配置とした部分のワイヤーソー10は、コ字形ガイド枠11の前記開放部を形成するように前方へ突き出した前向き腕部11aに沿って前後方向へ移動自在に設置した左右両側で対をなす可動ガイドシーブ12a、12aによって案内され、開放部間を前後方向へ平行移動として変位する構成とされている。
上記可動ガイドシーブ12aを前向き腕部11aに沿って前後方向へ移動させる移動機構の詳しい構成の図示は省略したが、チエン駆動方式又はピニオンラック方式、若しくは油圧シリンダ駆動方式などにより、コ字形ガイド枠11を形成する前向き腕部11aに沿って前後方向へ遠隔制御により移動させる機構を採用して実施される。
一方、コ字形ガイド枠11の後背部位の枠材に、ワイヤーソー10を駆動して周回走行させる駆動部13aと張力制御部13b及び前記可動ガイドシーブ12aを移動させる機構の制御部その他の要素を含む駆動制御部13を備えている。そして、前記構成のワイヤーソー型切断機は、上記した作業フロア3(図6参照)上を走行・移動が自在な作業車両14の前部へ、取り付けられ、コ字形ガイド枠11が上下方向への平行移動も自在に支持されている。
因みに、上記作業車両14としては、例えば公知のフォークリフト車を、遠隔操縦が自在な構成に改造したに等しいものが好適に使用される。同車両の前頭部のフォーク支持部に、上記構成のワイヤーソー型切断機のコ字形ガイド枠11の後部中央部分が支持されている。そして、ワイヤーソー型切断機は、作業車両14のリフト機構部を利用して、コ字形ガイド枠11を上下方向(垂直上向き又は下向き方向)へ平行移動させることが自在に支持されている。
The portion of the wire saw 10 that is arranged to cross between the open portions of the U-shaped guide frame 11 is in the front-rear direction along the forward arm 11 a that protrudes forward so as to form the open portion of the U-shaped guide frame 11. It is guided by movable guide sheaves 12a, 12a that are paired on both the left and right sides that are installed so as to be freely movable, and is displaced in the front-rear direction as a parallel movement.
Although a detailed configuration of a moving mechanism for moving the movable guide sheave 12a in the front-rear direction along the forward arm 11a is not shown, a U-shaped guide frame is formed by a chain drive system, a pinion rack system, or a hydraulic cylinder drive system. 11 is implemented by adopting a mechanism for moving the arm 11 forward and backward along the forward-facing arm portion 11a by remote control.
On the other hand, on the frame material of the rear part of the U-shaped guide frame 11, a drive unit 13a that drives the wire saw 10 to run around, a tension control unit 13b, and a control unit of a mechanism that moves the movable guide sheave 12a and other elements. The drive control part 13 including is provided. The wire saw-type cutting machine having the above-described configuration is attached to the front portion of the work vehicle 14 that can travel and move on the work floor 3 (see FIG. 6), and the U-shaped guide frame 11 moves in the vertical direction. Is also supported freely.
Incidentally, as the work vehicle 14, for example, a known forklift truck which is equivalent to a remodeled configuration capable of remote control is preferably used. A central portion of the rear portion of the U-shaped guide frame 11 of the wire saw type cutting machine having the above-described configuration is supported by a fork support portion at the frontal portion of the vehicle. And the wire saw type cutting machine is supported in such a manner that the U-shaped guide frame 11 can be translated in the vertical direction (vertically upward or downward) using the lift mechanism of the work vehicle 14.

次に、上記構成の切断・解体装置20を使用して、請求項1及び3、4に記載した発明に係る切断・解体工法を、例えば大規模原子炉の生体遮蔽壁1に囲まれた中で原子炉遮蔽壁2(図6参照)を切断・解体に実施する場合を説明する。
本発明の切断・解体工法を実施するに際しては、上記原子炉遮蔽壁2に予め用意されている機器搬入口(図示省略)を開いて、作業フロア3上へ、上記構成の切断・解体装置20を少なくとも1台、又は必要に応じて3台ぐらい搬入し、以下に説明するように使用して、原子炉遮蔽壁2の切断・解体作業を進める。
その際、上記切断・解体装置20の搬出・入から切断・解体の各工程の作業手順を遠隔操縦するために、例えば生体遮蔽壁1より外方の安全な場所に設備した制御室において、担当技術者(オペレータ)が操縦するために必要な情報を得る手段として、公知の高精度(高感度)監視カメラやマイクロフォンを予め切断・解体装置20へ直接設置しておくほか、同切断・解体装置20が移動し稼働する経路の各場所にも、適切な監視位置へ必要数の監視カメラを設置しておく。こうして切断・解体装置20の全ての動作を完全認識、把握する条件整備を行っておくことが肝要である。或いは監視カメラ群を原子炉遮蔽壁2の筒内へ吊り込む等の方法によっても設備して、切断・解体現場の作業情報や位置情報を必要十分に精緻に取得して認識、把握する準備も行う。
その上で、切断・解体装置20の遠隔操縦を下記のように行い、切断・解体の各作業工程を進める。その操縦内容や操縦システムの構成は、現在の技術水準に照らして必然の常套手法にも等しいから、更なる説明は省略する。
Next, using the cutting / disassembling apparatus 20 having the above-described configuration, the cutting / disassembling method according to the invention described in claims 1, 3, and 4 is performed, for example, surrounded by the biological shielding wall 1 of a large-scale nuclear reactor. The case where the reactor shielding wall 2 (see FIG. 6) is cut and disassembled will be described.
When carrying out the cutting / disassembling method of the present invention, an equipment carry-in port (not shown) prepared in advance in the reactor shielding wall 2 is opened, and the cutting / disassembling apparatus 20 having the above-described configuration is placed on the work floor 3. At least one or three as necessary is carried in and used as described below to proceed with the cutting and dismantling of the reactor shielding wall 2.
At that time, in order to remotely control the work procedures of the cutting / disassembling process from carrying out / in / out of the cutting / disassembling apparatus 20, for example, in a control room installed in a safe place outside the biological shielding wall 1 As a means for obtaining information necessary for the engineer (operator) to steer, a known high-precision (high sensitivity) surveillance camera or microphone is directly installed in the cutting / disassembling apparatus 20 in advance, and the cutting / disassembling apparatus A necessary number of monitoring cameras are installed at appropriate monitoring positions in each place on the route on which the 20 moves and operates. In this way, it is important to prepare conditions for fully recognizing and grasping all operations of the cutting / disassembling apparatus 20. Alternatively, the monitoring camera group can be installed by a method such as suspending it into the cylinder of the reactor shielding wall 2, and preparations for acquiring and recognizing and grasping work information and position information on the cutting / dismantling site are necessary and precise. Do.
After that, remote control of the cutting / disassembling apparatus 20 is performed as follows, and each work process of cutting / disassembling is advanced. The maneuvering content and the construction of the maneuvering system are equivalent to the conventional methods that are inevitable in light of the current state of the art, so further explanation is omitted.

上記した切断・解体装置20の遠隔操縦の条件整備や下準備を行った上で、請求項1、2記載の発明に係る切断・解体工法は、対象とする原子炉遮蔽壁2の切断・解体作業を次のように進める。
先ず上記構成の切断・解体装置20は、原子炉遮蔽壁2に予め設備された機器搬入口を開いて、図4A、Bに概念図を例示したように、作業フロア3上へ1台、或いは複数台を搬入する。
切断・解体装置20は、ワイヤーソー型切断機を構成するコ字形ガイド枠11の開放部を前向きとした水平姿勢で、切断対象である原子炉遮蔽壁2へ向かって押し付けるように前進させる。そして、図3A及び図4A、Bに例示したように、コ字形ガイド枠11の前側の開放部が原子炉遮蔽壁2の外周の一部を抱持する配置に準備する。
この時点では未だ、コ字形ガイド枠11のワイヤーソー10は、例えば図3Aに例示したように、可動ガイドシーブ12aはコ字形ガイド枠11における前向き腕部11aの後部側へ最接近したスタート位置に置かれる。必然、同コ字形ガイド枠11の開放部間を横断するワイヤーソー10も後部枠側へ最接近した位置に配置されている。
After performing the remote control conditions and preparations for the above-described cutting / disassembling apparatus 20, the cutting / disassembling method according to the first and second aspects of the invention includes cutting / disassembling the target reactor shielding wall 2. Proceed as follows:
First, the cutting / disassembling apparatus 20 having the above-described configuration opens the equipment entrance provided in advance in the reactor shielding wall 2 and, as illustrated in the conceptual diagrams in FIGS. Bring in multiple units.
The cutting / disassembling apparatus 20 is advanced in a horizontal posture with the open portion of the U-shaped guide frame 11 constituting the wire saw type cutting machine facing forward, so as to be pressed toward the reactor shielding wall 2 to be cut. Then, as illustrated in FIGS. 3A, 4 </ b> A, and B, an arrangement is made in which the opening portion on the front side of the U-shaped guide frame 11 holds a part of the outer periphery of the reactor shielding wall 2.
At this time, the wire saw 10 of the U-shaped guide frame 11 is still at the start position where the movable guide sheave 12a is closest to the rear side of the forward arm 11a in the U-shaped guide frame 11 as illustrated in FIG. Placed. Inevitably, the wire saw 10 that crosses between the open portions of the U-shaped guide frame 11 is also arranged at a position closest to the rear frame side.

上記の準備が整うと、駆動制御部13を通じてワイヤーソー10を駆動し周回走行を開始させる。そして、可動ガイドシーブ12aを前向き腕部11aに沿って前方へ移動させる。かくすると、ワイヤーソー10は周回走行しつつ前向き腕部11aの前方へ平行移動として変位する。その変位にしたがい、同ワイヤーソー10の走行軌跡に沿って、原子炉遮蔽壁2の円周方向へ水平切断が進む。
因みに、本実施例1の場合、原子炉遮蔽壁2の切断・解体は、上記したように外径が8m、壁厚が60〜80cmに及ぶほど大規模構造であるため、例えば図5A、Bに例示したように、原子炉遮蔽壁2の円周を、中心円弧角にして120度ずつに3等分して切断し解体を進める手法が好適に採用される。
ただし、切断・解体装置20により切断・解体する切り取り片の大きさの設定、及びコ字形ガイド枠11の規模(大きさ)は、前記の限りではない。原子炉遮蔽壁2の規模に応じて、或いは切断、解体作業場の大きさ、又は作業工程の進捗の適否などを考慮して、原子炉遮蔽壁2の円周を更に大きく、又は4等分以上に細分化して切断し解体する等々、規模や環境条件等を考慮して実施すれば足りる。
When the above preparation is completed, the wire saw 10 is driven through the drive control unit 13 to start the circular traveling. Then, the movable guide sheave 12a is moved forward along the forward arm portion 11a. Thus, the wire saw 10 is displaced as a parallel movement forward of the forward arm portion 11a while traveling around. According to the displacement, horizontal cutting proceeds in the circumferential direction of the reactor shielding wall 2 along the traveling locus of the wire saw 10.
Incidentally, in the case of the present Example 1, since the cutting and dismantling of the reactor shielding wall 2 has a large-scale structure with an outer diameter of 8 m and a wall thickness of 60 to 80 cm as described above, for example, FIG. As exemplified in FIG. 5, a method is preferably employed in which the circumference of the reactor shielding wall 2 is divided into three equal parts of 120 degrees each with the central arc angle, and the dismantling is advanced.
However, the setting of the size of the cut piece to be cut / disassembled by the cutting / disassembling apparatus 20 and the scale (size) of the U-shaped guide frame 11 are not limited to the above. Depending on the size of the reactor shielding wall 2 or considering the size of the cutting, dismantling work site, or the appropriateness of the progress of the work process, the circumference of the reactor shielding wall 2 is made larger, or more than four equal parts It is sufficient to consider the scale, environmental conditions, etc.

原子炉遮蔽壁2の切断、解体の作業工程について更に説明を進める。
ワイヤーソー10の駆動を開始し、可動ガイドシーブ12aを前向き腕部11aに沿って前方へ移動させてゆくと、円周方向の水平切断が進む。可動ガイドシーブ12aが、前向き腕部11aの前進限度位置に到達すると、図3Bに切断概要を例示したように、ワイヤーソー10による切断は、遂に原子炉遮蔽壁2の壁厚を完全に切断して内径面にまで到達し、当該施工区分における水平切断の目的が達成される。図3B中の符号αは前記水平切断による切断線を例示している。
上記の水平切断が目標位置まで到達した段階で、次にはそのままワイヤーソー型切断機のコ字形ガイド枠11を、図3Cの場合は垂直上向き方向へ平行移動させて垂直切断を行っている。この垂直切断は、切り取り片の大きさ、重量を考慮して定めた高さ寸法まで行う。図3C中の符号βが、前記のように行った垂直切断の切断線を示している。垂直切断線βの長さは、切り取り片の大きさ(高さ寸法)を決定することになる。
なお、前記の垂直切断は、前記水平切断線αに続けて、垂直下向き方向へ行う場合もあることを申し添える。
The description of the work process of cutting and dismantling the reactor shielding wall 2 will be further advanced.
When driving of the wire saw 10 is started and the movable guide sheave 12a is moved forward along the forward arm 11a, horizontal cutting in the circumferential direction proceeds. When the movable guide sheave 12a reaches the forward limit position of the forward arm 11a, the wire saw 10 finally cuts the wall thickness of the reactor shielding wall 2 as illustrated in FIG. 3B. The purpose of horizontal cutting in the construction section is achieved. A symbol α in FIG. 3B illustrates a cutting line by the horizontal cutting.
When the horizontal cutting reaches the target position, the U-shaped guide frame 11 of the wire saw-type cutting machine is moved as it is in the vertical upward direction in the case of FIG. 3C. This vertical cutting is performed up to a height dimension determined in consideration of the size and weight of the cut piece. A symbol β in FIG. 3C indicates a cutting line of the vertical cutting performed as described above. The length of the vertical cutting line β determines the size (height dimension) of the cut piece.
It should be noted that the vertical cutting may be performed in a vertically downward direction following the horizontal cutting line α.

上記の垂直切断が目標の高さ位置へ到達すると、次には図3Dに例示したように可動ガイドシーブ12aを前向き腕部11aに沿って後退させ、ワイヤーソー10を後方へ変位させる駆動を行うことによって戻りの水平切断を進める。この戻りの水平切断において、ワイヤーソー10が原子炉遮蔽壁2の外周面の外へ露出した段階で、原子炉遮蔽壁2の一部分をブロック状に切り取る目的が達成される。図3D中の符号γで指した斜線部が、図示の便宜上、戻りの水平切断による切断面(切断跡)を示している。もっとも、前記戻りの水平切断は、作業フロア3上を移動自在な作業車両14を後方へ後退移動させる動作によって、又は前記した双方の動作を組み合わせることによっても同様に実施することができる。   When the above vertical cutting reaches the target height position, next, as illustrated in FIG. 3D, the movable guide sheave 12a is retracted along the forward arm portion 11a, and the wire saw 10 is displaced backward. By proceeding with the horizontal cutting of the return. In this returning horizontal cutting, at the stage where the wire saw 10 is exposed to the outside of the outer peripheral surface of the reactor shielding wall 2, the purpose of cutting a part of the reactor shielding wall 2 into a block shape is achieved. A hatched portion indicated by a symbol γ in FIG. 3D indicates a cut surface (cut trace) by the horizontal cutting of the return for convenience of illustration. However, the horizontal cutting of the return can be performed in the same manner by an operation of moving the work vehicle 14 movable on the work floor 3 backward, or by combining both of the operations described above.

上記の切断作業による切り取り片は、具体的に図示することは省略したが、図3Dから推認できるように、ドーナツの一部分を接線方向に切断したような切り取り形状を呈する。よって、その荷扱いは比較的容易である。
そこで別途作業フロア3上へ搬入して用意した、例えば遠隔操縦できるフォークリフト車のごとき運搬車により、前記切り取り片を把持させるか又はすくい上げるように支持させて指定場所へ運び出す。具体的に言えば、前記切り取り片は、例えば図6に示した生体遮蔽壁1内の部屋、又は上記原子炉遮蔽壁2に予め用意されている機器搬入口を開いて、生体遮蔽壁1の外の部屋まで運び出し、そこで一定以下の大きさまで解砕し、放射線を遮断する構造に密封包装した上で、最終処分に回す。
また、上記した切断片の運び出し作業と相前後して、原子炉遮蔽壁2において前記切断片を切り取った切り取り跡へは、図4Bの右側部分に例示したように、予め作業フロア3上に用意しておいた垂直ジャッキ21を速やかに建て起こして設置する。或いは図6に基づいて説明したように予め作業フロアー3の一定位置へ必要台数を一体的に組み入れておいた垂直ジャッキ21群の中から適切な位置を選択して、その垂直ジャッキを起立させて支持させる。勿論、前記垂直ジャッキ21の建て込み設置程度の作業は、作業員が防護服を着用して作業フロア3上へ入り行っても良い。
こうして上部を吊られた原子炉遮蔽壁2の下部を順次に垂直ジャッキ21群で支持させることにより、原子炉遮蔽壁2はぐらついたり傾いたりする懸念のない、安定状態に位置決め固定を行って、次の切断、解体の作業工程に備えることができる。
Although the illustration of the cut piece by the above-described cutting operation is omitted, the cut-out shape is obtained by cutting a part of the donut in the tangential direction as can be inferred from FIG. 3D. Therefore, the handling of the load is relatively easy.
Accordingly, the cut piece is supported by being separately carried on the work floor 3 and supported, for example, by a forklift truck that can be remotely controlled, and carried out to a designated place. Specifically, for example, the cut piece opens a room in the biological shielding wall 1 shown in FIG. It is taken out to the outside room, where it is crushed to a certain size, sealed in a structure that blocks radiation, and sent to final disposal.
Also, in parallel with the above-described work of carrying out the cut pieces, the cut traces obtained by cutting off the cut pieces in the reactor shielding wall 2 are prepared in advance on the work floor 3 as illustrated in the right part of FIG. 4B. The vertical jack 21 that has been prepared is quickly erected and installed. Alternatively, as described with reference to FIG. 6, an appropriate position is selected from the group of vertical jacks 21 in which the necessary number is integrated into a predetermined position on the work floor 3 in advance, and the vertical jack is raised. Support. Needless to say, the work of installing the vertical jack 21 may be performed on the work floor 3 by an operator wearing protective clothing.
By sequentially supporting the lower part of the reactor shielding wall 2 with the upper part suspended by the vertical jacks 21 group, the reactor shielding wall 2 is positioned and fixed in a stable state without fear of wobbling or tilting. It can be prepared for the next cutting and dismantling work process.

その後は、上記同様の切断、解体の作業工程を、順次、原子炉遮蔽壁2の周方向へ繰り返し進めて、大型筒状構造物の切断・解体を進めることになる。
こうした切断、解体の作業工程を進める手順は、原子炉遮蔽壁2の周方向へワイヤーソー型切断・解体装置20の位置を順次に一定の回り方向へ位置を変えて進めつつ切断、解体工程を実施する方式のほか、図4AとBに対照的配置で例示した変化のように、切断・解体装置20を約180度正反対の位置へ段取り替えを行って、又は2台目の切断・解体装置20を予め作業フロア3上へ準備して、約180度正反対の位置で切断・解体の工程を進める方式などを適宜に実施できる。
後者の作業手順を実施すると、先の切り取り片を指定場所へ運び出す作業を行い、その切除跡へ垂直ジャッキ21を建て込み設置する作業を行う間に、同時並行作業工程を目的として反対側位置に用意した他の切断・解体装置20を使用して原子炉遮蔽壁2の切断、解体の工程を重複的に行えるから、作業能率を大いに高めることができる。
Thereafter, the same cutting and dismantling work steps as described above are sequentially repeated in the circumferential direction of the reactor shielding wall 2 to cut and dismantle the large cylindrical structure.
The procedure for proceeding with the cutting and demolition work process is as follows. The cutting and demolition process is performed while the position of the wire saw-type cutting / disassembling apparatus 20 is sequentially changed in a certain direction in the circumferential direction of the reactor shielding wall 2. In addition to the method to be implemented, the cutting / disassembling apparatus 20 is changed to a position opposite to about 180 degrees, or the second cutting / disassembling apparatus is changed as illustrated in the contrasting arrangement in FIGS. 4A and 4B. 20 can be prepared in advance on the work floor 3, and a method of proceeding the cutting / disassembling process at a position approximately opposite by 180 degrees can be appropriately implemented.
When the latter work procedure is carried out, the work of carrying out the previous cut piece to the designated place is carried out, and the work for installing and installing the vertical jack 21 on the excision trace is performed at the opposite side position for the purpose of the simultaneous parallel work process. Since the process of cutting and dismantling the reactor shielding wall 2 can be performed redundantly using the other prepared cutting / disassembling apparatus 20, work efficiency can be greatly improved.

次に、図5A、Bは、上記のようにして原子炉遮蔽壁2又はそのペデスタル4の切断・解体を、原子炉遮蔽壁2の1周分にわたり行った場合の切り口の一例を示している。
図5A、Bはまた、切断・解体装置20、が原子炉遮蔽壁2の円周をほぼ3等分して、表現を変えると中心角にして120度ずつの均等配分で切断・解体工程を進めた場合の結果を例示している。
即ち、図5Aに垂直切断のカット線c1〜c3の位置を例示したとおり、切断・解体装置20により原子炉遮蔽壁2の全円周を約3等分方式(円弧角120度ずつ)で切断・解体した場合、各カット線c1〜c3の交差部分には、原子炉遮蔽壁2を平・底面方向に見ると、ほぼ三角形状の切り残し部22が3個発生する。このように3個の切り残し部22が発生する切断手法を実施した場合、同切り残し部22によって原子炉遮蔽壁2を一時的に支持する作用が得られ、原子炉遮蔽壁2の切断・解体時の安定状態を確保できる。その故に、切り取り後へ垂直ジャッキ21を設置して支持させるまでの仮支えにも利用できるから好都合である。
勿論、前記三角形状の切り残し部22は、最終的に無用となった段階において、別途用意した切断機で切除することになる
Next, FIGS. 5A and 5B show an example of the cut when the reactor shielding wall 2 or its pedestal 4 is cut and disassembled over one round of the reactor shielding wall 2 as described above. .
FIGS. 5A and 5B also show that the cutting / disassembling apparatus 20 divides the circumference of the reactor shielding wall 2 into approximately three equal parts, and the expression is changed so that the cutting / disassembling process is performed at an even distribution of 120 degrees as the central angle. The result when proceeding is illustrated.
That is, as illustrated in FIG. 5A, the positions of the cut lines c1 to c3 of the vertical cutting are illustrated by cutting the entire circumference of the reactor shielding wall 2 by the cutting / disassembling apparatus 20 in approximately three equal parts (arc angle of 120 degrees). -When dismantling, when the reactor shielding wall 2 is viewed in the flat and bottom direction at the intersections of the cut lines c1 to c3, three substantially triangular uncut portions 22 are generated. When the cutting method in which the three uncut portions 22 are generated in this way is performed, an operation of temporarily supporting the reactor shielding wall 2 by the uncut portions 22 is obtained, and the reactor shielding wall 2 is cut and A stable state at the time of dismantling can be secured. Therefore, it is convenient because it can also be used for temporary support until the vertical jack 21 is installed and supported after cutting.
Of course, the triangular uncut portion 22 is cut off by a separately prepared cutting machine when it is finally useless.

その後、原子炉遮蔽壁2における次上位部分の切断・解体作業を進めるために、先ず原子炉遮蔽壁2の上記吊り手段を緩めて1ステップ分下げる操作を行う。同時に垂直ジャッキ21を収縮動作させて、原子炉遮蔽壁2の支持位置を下げる制御を合一に行い、作業フロア3上に位置する切断・解体装置20による次段階の切断・解体作業に望ましい原子炉遮蔽壁2の高さ位置を調整する。その上で、次段階の切断・解体作業の工程を上記同様に進める。
なお、上記の実施例1では、切断・解体装置20でいきなり原子炉遮蔽壁2の切断・解体を行う場合について説明したが、この限りではない。
上記段落番号[0007]で概説したとおり、作業床として利用する作業フロア3は、先付け(既設)のダイヤフラムフロアを利用するか、又は後付けで構築した作業フロアのいずれかである。そのいずれであるにせよ、図6に例示したように、作業フロア3の床面高さ、つまり同作業フロア3上で稼働させる切断・解体装置20の基本姿勢におけるワイヤーソー10の当初位置(床面からの高さ)によっては、いきなりペデスタル4を切断・解体する高さであったり、或いは原子炉遮蔽壁2の予定位置を切断・解体する高さであったりもする。
いずれの切断・解体を実施するかは、作業場の設置条件により異なり、ケースバイケースであるから、上記原子炉遮蔽壁2の高さ位置の調整が重要である。
Thereafter, in order to proceed with the cutting and dismantling work of the next upper part in the reactor shielding wall 2, first, the operation of loosening the suspension means of the reactor shielding wall 2 and lowering it by one step is performed. At the same time, the vertical jack 21 is contracted to control the lowering of the support position of the reactor shielding wall 2 together, so that atoms desirable for the next cutting / dismantling work by the cutting / dismantling apparatus 20 located on the work floor 3 are performed. The height position of the furnace shielding wall 2 is adjusted. Then, the next cutting / disassembling process is performed in the same manner as described above.
In the first embodiment described above, the cutting / disassembling apparatus 20 suddenly cuts / disassembles the reactor shielding wall 2. However, the present invention is not limited to this.
As outlined in paragraph [0007] above, the work floor 3 used as a work floor is either a pre-installed (existing) diaphragm floor or a work floor constructed by retrofitting. In any case, as illustrated in FIG. 6, the floor surface height of the work floor 3, that is, the initial position (floor) of the wire saw 10 in the basic posture of the cutting / disassembling apparatus 20 operated on the work floor 3. Depending on the height from the surface, it may be the height at which the pedestal 4 is suddenly cut and disassembled, or the height at which the planned position of the reactor shielding wall 2 is cut and disassembled.
Which cutting / disassembly is performed depends on the installation conditions of the workplace and is case by case. Therefore, adjustment of the height position of the reactor shielding wall 2 is important.

次に、請求項6に記載した発明に係るマルチ型切断・解体装置20’の実施例2を、図2A、Bに基づいて説明する。
本実施例2のマルチ型切断・解体装置20’は、平面視がコ字形を為す複数(図示例では3台)のコ字形ガイド枠11が、上下に積層された配置で構成されている点が、図1の実施例1(言うなればシングル型)と異なる。しかし、その他の基本的構成と機能及び使用方法等は、両者共に多く共通していることを先ず申し上げる。
勿論、切断・解体対象である原子炉遮蔽壁2は、図6に示したように吊り手段により上部を吊って支持された状態に保つことに変わりがなく、マルチ型切断・解体装置20’を以下に説明するように使用して切断・解体の工程をマルチ手法で実施する。
Next, a second embodiment of the multi-type cutting / disassembling apparatus 20 ′ according to the invention described in claim 6 will be described with reference to FIGS.
The multi-type cutting / disassembling apparatus 20 ′ of the second embodiment is configured in such a manner that a plurality of (three in the illustrated example) U-shaped guide frames 11 having a U-shape in plan view are stacked one above the other. However, it differs from Example 1 (in other words, single type) in FIG. However, I would like to mention first that there are many other basic configurations, functions, and usage methods.
Of course, as shown in FIG. 6, the reactor shielding wall 2 to be cut and dismantled is maintained in a state where the upper part is suspended and supported by the suspension means, and the multi-type cutting and dismantling apparatus 20 ′ is maintained. As described below, the cutting / disassembling process is performed by a multi-method.

本実施例2のマルチ型切断・解体装置20’も、図2A、Bに実施例1として示したシングル型切断・解体装置20と同様、平面視において前端を大きな間口に開放されたコ字形状をなしワイヤーソーを周回走行させる複数のコ字形ガイド枠11を水平姿勢で用いる。図示した実施例2の場合は、3台のコ字形ガイド枠11が、個別に垂直上向き又は下向き方向へ平行移動可能に、且つ平面的に積層した配置に備える構成とされている。
ワイヤーソー10は、上記の各コ字形ガイド枠11の開放部間を横断する配置とされ、同コ字形ガイド枠11に沿って周回走行するように駆動される。前記開放部間を横断する部分のワイヤーソー10は、コ字形ガイド枠11を形成する前向き腕部11aに沿って前後方向へ移動自在に設置した可動ガイドシーブ(図1Bを参照)により、開放部間を前後方向へ平行移動として変位する構成とされている。
Similarly to the single-type cutting / disassembling apparatus 20 shown in FIG. 2A and FIG. 2B as the first-type cutting / disassembling apparatus 20 in the second embodiment, the U-shaped cutting / disassembling apparatus 20 ′ A plurality of U-shaped guide frames 11 that run around the wire saw are used in a horizontal posture. In the case of the illustrated second embodiment, the three U-shaped guide frames 11 are configured so as to be individually arranged in a vertically upward or downward direction and provided in a planarly stacked arrangement.
The wire saw 10 is arranged so as to cross between the open portions of the respective U-shaped guide frames 11 and is driven so as to travel around the U-shaped guide frames 11. A portion of the wire saw 10 that crosses between the open portions is opened by a movable guide sheave (see FIG. 1B) that is movably installed in the front-rear direction along a forward arm portion 11 a that forms a U-shaped guide frame 11. It is set as the structure displaced as a parallel movement in the front-back direction.

各コ字形ガイド枠11の後背部にはそれぞれ、ワイヤーソー10を周回走行させる駆動部13aと張力制御部13b及び前記可動ガイドシーブを移動させる機構の制御部を含む駆動制御部13(図1Cも参照)を備えている。
上記構成の3台のワイヤーソー型切断機は、図2A、Bに見るとおり、上記作業フロア3上を移動自在な作業車両14の前部へ、各コ字形ガイド枠11が個別に上下方向(垂直上向き又は下向き方向)への平行移動が自在に支持されてマルチ型に構成されている。
本実施例2の場合も、上記実施例1と同様、作業車両14としては、公知のフォークリフト車を遠隔操縦が自在な構成に改造した構成で利用する。前部のフォーク支持部に、上記構成の3台のワイヤーソー型切断機の主体であるコ字形ガイド枠11の後部枠中央部が、各コ字形ガイド枠11が個別に上下方向への平行移動(垂直上向き又は下向き方向への動作)が可能に支持されている。
勿論、各ワイヤーソー型切断機の駆動制御部13及び作業車両14の操縦は、遠隔制御が可能に構成されている。
A drive control unit 13 including a drive unit 13a for rotating the wire saw 10 and a tension control unit 13b and a control unit for a mechanism for moving the movable guide sheave is provided at the back of each U-shaped guide frame 11 (FIG. 1C also). See).
As shown in FIGS. 2A and 2B, each of the three wire saw type cutting machines having the above-described configuration is configured so that each U-shaped guide frame 11 is individually moved in the vertical direction to the front portion of the work vehicle 14 movable on the work floor 3 ( A vertical movement (vertical upward or downward direction) is supported in a freely movable manner to form a multi-type.
Also in the case of the second embodiment, as in the first embodiment, the work vehicle 14 is used in a configuration in which a known forklift truck is modified to a configuration that allows remote control. The central part of the rear frame of the U-shaped guide frame 11 which is the main body of the three wire saw-type cutting machines having the above-described configuration is arranged on the front fork support section, and each U-shaped guide frame 11 is individually translated in the vertical direction. (Vertical upward or downward movement) is supported.
Of course, the drive control unit 13 and the operation of the work vehicle 14 of each wire saw type cutting machine are configured to be remotely controlled.

次に、上記構成のマルチ型切断・解体装置20’を使用して、同じく大規模原子炉の生体遮蔽壁1に囲まれた構成で筒状を為す原子炉遮蔽壁2(図6参照)を切断・解体する場合を、請求項2記載の発明に係る切断・解体工法の実施例として、以下に説明する。
本実施例の切断・解体工法の基本は、およそ上記実施例1で説明した請求項1記載の発明に係る切断・解体工法と多く共通する。そこで共通点の説明は一部割愛して説明を進めることを予め申し上げる。
本実施例の切断・解体工法の場合も、原子炉遮蔽壁2に予め用意された上記の機器搬入口を開いて、作業フロア3上へ上記構成のマルチ型切断・解体装置20’を少なくとも1台、又は必要に応じて複数台(3台ぐらい)搬入して使用することは、上記実施例1の場合と同様である。
そして、切断・解体装置20’の搬出・入から切断・解体の各作業手順を、例えば生体遮蔽壁1より外方の安全な場所に設置した制御室から、担当技術者(オペレータ)が遠隔操縦可能とするための準備として、公知の高精度監視カメラやマイクロフォン等を、予め当該マルチ型切断・解体装置20’へ直接設置すること、及び同マルチ型切断・解体装置20’が移動する経路や作業する各場所へも、適切な監視位置へ必要数の監視カメラ等を設置して当該マルチ型切断・解体装置20’の全ての作業内容と動作、位置などを完全把握する条件整備を行っておくことも実施例1と同様である。
場合によっては監視カメラ群を原子炉遮蔽壁2の筒内空間へ吊り込む等の方法により設備して、切断・解体現場の作業情報を精緻に認識、把握可能にして作業を実施する。
上記の下準備を全て整えた上で、上記マルチ型切断・解体装置20’の遠隔操縦を行いつつ、原子炉遮蔽壁2の切断・解体の各作業工程を下記のマルチ手法で進める。
Next, by using the multi-type cutting / disassembling apparatus 20 ′ having the above-described configuration, the reactor shielding wall 2 (see FIG. 6) having a cylindrical shape with the configuration surrounded by the biological shielding wall 1 of the large-scale nuclear reactor. The case of cutting / disassembling will be described below as an example of the cutting / disassembling method according to the invention of claim 2.
The basics of the cutting / disassembling method of the present embodiment are almost in common with the cutting / disassembling method according to the invention described in claim 1 described in the first embodiment. Therefore, I would like to say in advance that some explanations of common points will be omitted.
Also in the case of the cutting / dismantling method of the present embodiment, the above-mentioned equipment entrance prepared in the reactor shielding wall 2 is opened and at least one multi-type cutting / dismantling apparatus 20 ′ having the above-described configuration is placed on the work floor 3. It is the same as in the case of the first embodiment that a plurality of units (or about three units) are carried in and used as necessary.
Then, the engineer in charge (operator) remotely controls each work procedure from carrying out / in / out of the cutting / disassembling apparatus 20 ′ to cutting / disassembling, for example, from a control room installed in a safe place outside the biological shielding wall 1. As preparations for making it possible, a known high-precision surveillance camera, microphone, or the like is directly installed in advance on the multi-type cutting / disassembling apparatus 20 ′, and a path along which the multi-type cutting / disassembling apparatus 20 ′ moves, At each work place, install the necessary number of surveillance cameras, etc. at appropriate monitoring positions, and prepare conditions to fully grasp all work contents, operations, positions, etc. of the multi-type cutting / disassembling apparatus 20 ′. This is the same as in the first embodiment.
In some cases, a monitoring camera group is installed by a method such as suspending in the in-cylinder space of the reactor shielding wall 2 so that the work information on the cutting / dismantling site can be recognized and grasped precisely.
After all the above preparations have been made, each work process of cutting / disassembling the reactor shielding wall 2 is advanced by the following multi-method while remotely controlling the multi-type cutting / disassembling apparatus 20 ′.

本実施例2の場合も、切断対象の原子炉遮蔽壁2は、図6に例示したように、上部を吊り手段により吊って支持させた状態で、その下部から順に切断・解体の各作業工程を進める。
上記したマルチ型切断・解体装置20’は、原子炉遮蔽壁2に設けられた機器搬入口を開いて作業フロア3上へ搬入する。
そして、マルチ型切断・解体装置20’は、各ワイヤーソー型切断機のコ字形ガイド枠11の開放部を前向きとした水平姿勢とし、且つ各コ字形ガイド枠11の相互間に垂直方向間隔を各切断片の切り取り高さ寸法として設定した上で、各コ字形ガイド枠11原子炉遮蔽壁2へ押し付けるように前進させ、各コ字形ガイド枠11の開放部が原子炉遮蔽壁2の外周部を抱持する配置にする。
次いで、各コ字形ガイド枠11のワイヤーソー10を一斉に周回走行するように駆動させる。そして、可動ガイドシーブ12aを前向き腕部11aに沿って前方へ変位させることにより、各コ字形ガイド枠11の開放部間を横断するワイヤーソー10で、それぞれのワイヤーソー10の高さ位置毎に原子炉遮蔽壁2の水平切断を進める。したがって、一気に複数層(3段)に及ぶ原子炉遮蔽壁2の切断・解体をマルチ方式で実施できる。
上記マルチ手法の水平切断工程により、原子炉遮蔽壁2には3本の水平切断線(図3Bの符号αを参照)が、当初に設定した上下方向の間隔を開けて形成される。この場合、水平切断線の奥行き深さ、つまり可動ガイドシーブ12aの前進ストロークは同一に設定して実施するのが、後述する意味で好都合である。しかし、必ずしも同一の前進ストロークで実施することが義務的条件ではない。
Also in the case of the second embodiment, as illustrated in FIG. 6, the reactor shielding wall 2 to be cut is in a state in which the upper part is suspended and supported by the suspension means, and the cutting and dismantling work steps are sequentially performed from the lower part. To proceed.
The above-described multi-type cutting / disassembling apparatus 20 ′ opens the equipment entrance provided in the reactor shielding wall 2 and carries it on the work floor 3.
The multi-type cutting / disassembling apparatus 20 ′ has a horizontal posture in which the open portion of the U-shaped guide frame 11 of each wire saw type cutting machine faces forward, and a vertical interval is provided between the U-shaped guide frames 11. After setting the cut height of each cut piece, the U-shaped guide frame 11 is advanced so as to be pressed against the reactor shielding wall 2, and the open portion of each U-shaped guide frame 11 is the outer peripheral portion of the reactor shielding wall 2. Arrange to hold.
Next, the wire saws 10 of the respective U-shaped guide frames 11 are driven so as to travel around all at once. Then, by moving the movable guide sheave 12a forward along the forward arm 11a, the wire saw 10 traverses between the open portions of the U-shaped guide frames 11, and for each height position of each wire saw 10. Advance horizontal cutting of the reactor shielding wall 2. Therefore, it is possible to cut and dismantle the reactor shielding wall 2 that covers a plurality of layers (three stages) at once.
Through the multi-cutting horizontal cutting process, three horizontal cutting lines (see symbol α in FIG. 3B) are formed on the reactor shielding wall 2 with an initially set vertical interval. In this case, it is advantageous in the sense described later that the depth and depth of the horizontal cutting line, that is, the advance stroke of the movable guide sheave 12a is set to be the same. However, it is not necessarily a requirement to carry out with the same forward stroke.

上記のようにして各コ字形ガイド枠11の可動ガイドシーブ12aが、コ字形ガイド枠11を形成する前向き腕部11aの前進限度位置まで水平切断を進めた段階で、水平切断を終了する。
次にはワイヤーソー型切断機の各コ字形ガイド枠11を、それぞれ垂直上向き(又は逆に下向き)方向へ平行移動させる垂直切断を行う。但し、この垂直切断に際しては、次に説明するように工夫した作業工程を実施することが好ましい。
何故なら、上記3台のコ字形ガイド枠11による垂直切断が同時並行に進められると、一気に最大2個の切断片を生じてしまい、各切断片が不用意に転がる混乱(崩落状態)を生ずるからである。
そうした混乱を未然に避ける手法として、先ずは最下段のコ字形ガイド枠11におけるワイヤーソー10による上向きの垂直切断を先行して進め、同部分(下段部分)の切り落としを達成する。その後、同最下段及び最上段のコ字形ガイド枠11におけるワイヤーソー10をそれぞれ当初位置(コ字形ガイド枠11の後部枠へ最接近するスタート位置)へ戻す水平変位を行わせる。
このときまで次上段の字形ガイド枠11による上向きの垂直切断は、切断片が不用意に落下しない限度位置までの進行に止めておく。
そして、前記最下段のワイヤーソー10による切り落としが完結した後に、次上段のコ字形ガイド枠11のワイヤソー10による上向き切断を進める。
かくすると、最下段の切断片が切り取られるまでは、次上位の切断は未完成であり、次上位の切断片が不用意に落下して混乱を生ずることは避けられる。
もとより3台のコ字形ガイド枠11による原子炉遮蔽壁2の切断工程の手順をどのように考えて実行するかは、当事者の考え、工夫に委せて良いことである。
要は最上段の切断片が切り取られるまでの間、切断片が不用意に落下して混乱することを避ける手順を実施すれば良いことである。
When the movable guide sheave 12a of each U-shaped guide frame 11 advances the horizontal cutting to the forward limit position of the forward arm 11a forming the U-shaped guide frame 11 as described above, the horizontal cutting ends.
Next, vertical cutting is performed by translating each U-shaped guide frame 11 of the wire saw type cutting machine in a vertically upward direction (or conversely downward direction). However, in this vertical cutting, it is preferable to carry out a work process devised as described below.
This is because, when vertical cutting by the three U-shaped guide frames 11 proceeds simultaneously in parallel, a maximum of two cutting pieces are generated at a stretch, causing a confusion (collapsed state) in which each cutting piece rolls carelessly. Because.
As a technique for avoiding such confusion, first, the vertical vertical cutting by the wire saw 10 in the lowermost U-shaped guide frame 11 is advanced in advance, and the same part (lower part) is cut off. Thereafter, horizontal displacement is performed to return the wire saws 10 in the lowermost and uppermost U-shaped guide frames 11 to their initial positions (start positions closest to the rear frame of the U-shaped guide frame 11).
Up to this point, the upward vertical cutting by the next upper-shaped guide frame 11 is stopped until it reaches the limit position where the cut pieces do not fall carelessly.
Then, after the cutting by the lowermost wire saw 10 is completed, the upward cutting by the wire saw 10 of the next upper U-shaped guide frame 11 is advanced.
Thus, until the lowermost cut piece is cut off, the next upper cut is incomplete, and it is possible to prevent the next upper cut piece from being accidentally dropped and causing confusion.
Of course, how to consider and execute the procedure of the cutting process of the reactor shielding wall 2 by the three U-shaped guide frames 11 can be left to the thoughts and ideas of the parties concerned.
In short, it is only necessary to implement a procedure for preventing the cut piece from being inadvertently dropped and confused until the uppermost cut piece is cut off.

上記のように切断・解体の作業工程を進めると、同時並行的に2個ないし3個の切断片の切り取りを複合的に混乱なく行え、切断・解体の作業効率を高められる。
勿論、この実施例2は、各コ字形ガイド枠11が3段に積層された構成の場合について説明したが、2段の構成による場合、或いは3段以上の構成で実施しても良く、上記同様の工程の実施により、マルチ手法の切断・解体作業を進めることができる。
なお、上述した最上位のワイヤーソー10による戻り工程を水平切断を兼ねて行う場合には、単に各コ各字形ガイド枠11の可動ガイドシーブを、その前向き腕部11aに沿って後退させて水平切断を実施する場合の他、別途に又は同時並行的に、作業車14を後退させる動作を組み合わせて行っても、同様な作用効果を得ることが可能である。
When the cutting / disassembling work process is advanced as described above, two or three pieces can be cut simultaneously and without any confusion, and the cutting / disassembling work efficiency can be improved.
Of course, in the second embodiment, the case where the U-shaped guide frames 11 are stacked in three stages has been described. However, in the case of a two-stage structure, or in a structure of three or more stages, the above-described configuration may be used. By performing the same process, it is possible to proceed with the multi-method cutting and dismantling work.
In the case where the return step by the uppermost wire saw 10 described above is performed also in the horizontal cutting, the movable guide sheave of each U-shaped guide frame 11 is simply retracted along the forward arm portion 11a and horizontally. In addition to the case where the cutting is performed, the same operation and effect can be obtained by performing the operation of retracting the work vehicle 14 separately or concurrently.

上記のようにして切り取った各切り取り片は、別途に作業フロア3上へ搬入して用意した運搬車で指定場所へ運び出し。最終処分に回すことは、上記した実施例1の通りである。
また、原子炉遮蔽壁2において上記の切り取り片の切り取り跡へ、順次に、垂直ジャッキ21を設置して、原子炉遮蔽壁2の下部を安定状態に支持させ位置決めする工程を実施することも、上記実施例1と同様である。
そして、以後の各工程を順次に、原子炉遮蔽壁2の周方向へ繰り返し進めて、原子炉遮蔽壁2の切断・解体を行うことも、上記実施例1の場合と変わらない。
また、原子炉遮蔽壁2の切断・解体の工程が、周方向へ一周分進んだ段階では、同原子炉遮蔽壁2の上部を吊って支持させた吊り手段、及び同原子炉遮蔽壁2の下部を支持する垂直ジャッキ21を操縦して、原子炉遮蔽壁2を上記切り取り片の高さ寸法相当分だけ下降させ、再びその下部を垂直ジャッキ21で支持させて、しかる後に、上記の切断・解体工程を順次円周方向へ進めて切断・解体を行うことも上記実施例1と変わらない。
Each cut piece cut out as described above is carried separately onto the work floor 3 and taken out to a designated place by a prepared transport vehicle. It is as above-mentioned Example 1 to send to final disposal.
Alternatively, the step of sequentially installing the vertical jack 21 to the cut traces of the cut pieces in the reactor shielding wall 2 to support and position the lower portion of the reactor shielding wall 2 in a stable state, The same as in the first embodiment.
Then, the subsequent steps are sequentially repeated in the circumferential direction of the reactor shielding wall 2 to cut and disassemble the reactor shielding wall 2 as in the case of the first embodiment.
Further, at the stage where the process of cutting / disassembling the reactor shielding wall 2 has progressed one round in the circumferential direction, the suspension means that suspends and supports the upper portion of the reactor shielding wall 2, and the reactor shielding wall 2 The vertical jack 21 supporting the lower part is operated to lower the reactor shielding wall 2 by an amount corresponding to the height of the cut piece, and the lower part is again supported by the vertical jack 21. It is the same as in the first embodiment that cutting and dismantling is performed by sequentially proceeding the dismantling process in the circumferential direction.

(その他の実施例)
ところで、本発明による上記切断・解体装置を使用する切断・解体工法の対象は、上記実施例で説明した原子炉遮蔽壁2に限らないことは、既に説明してきた。例えば焼却物中の有機物質等により汚染されて、人が一定の距離以上に近づくことが危険な大規模焼却炉施設の煙突などの切断・解体にも同様に適用できる。
そうした実施例を、図8及び図9に基づいて以下に簡単に説明する。
先ず図8は、具体的、詳細な図示は省略したが、大規模焼却炉施設の煙突40を、本発明による上記の切断・解体装置20又は20’を使用して切断・解体する工法の実施例を概念的に示している。
特に図8では、地面レベル(G.L)に用意した作業フロア41上に上記構成の切断・解体装置20又は20’を設置し、同作業フロア41の外周部及び上面部は有機物質等による汚染物質を飛散させない気密的遮蔽構造の防塵建屋42で囲っている。
煙突40は、その上端部を、地上のクレーン41から立ち上げたブーム44の先端から下ろしたワイヤー45を、詳細な図示は省略した吊り具5(具体的には図6を参照)と連結して吊り支持している。煙突40の上端面は有機物質等による汚染物質を飛散させないように密閉することが行われる。
当該煙突40は、その下部を本発明の上記切断・解体装置20又は20’により全周にわたる切断を行って吊り支持する。そして、煙突40は、本発明の上記切断・解体装置20又は20’を上記実施例1、2で説明したように操縦し作動させて順次に切断・解体を進め、その切断跡へ垂直ジャッキ21を上記した実施例のように設置して支持させ、位置を安定化ないし固定させる。そして、上記した切断・解体の進行に伴い、上記の吊り手段及び垂直ジャッキ21を制御して徐々に煙突40の下端位置を下げることは、上記の各実施例で説明したとおりである。
(Other examples)
By the way, it has already been explained that the object of the cutting / dismantling method using the cutting / dismantling apparatus according to the present invention is not limited to the reactor shielding wall 2 described in the above embodiment. For example, the present invention can be similarly applied to cutting and dismantling of a chimney of a large-scale incinerator facility that is contaminated by organic substances in incinerated materials and is dangerous for humans to approach a certain distance.
Such an embodiment will be briefly described below with reference to FIGS.
First, although FIG. 8 is not specifically shown in detail, the construction method of cutting and dismantling the chimney 40 of the large-scale incinerator facility using the above-described cutting and dismantling apparatus 20 or 20 ′ according to the present invention is performed. An example is shown conceptually.
In particular, in FIG. 8, the cutting / disassembling apparatus 20 or 20 ′ having the above-described configuration is installed on the work floor 41 prepared at the ground level (GL), and the outer peripheral portion and the upper surface portion of the work floor 41 are made of an organic substance or the like. It is surrounded by a dust-proof building 42 having an airtight shielding structure that does not disperse pollutants.
The chimney 40 has its upper end connected to a hoist 5 (specifically see FIG. 6), with a wire 45 lowered from the tip of the boom 44 raised from the crane 41 on the ground. Suspended and supported. The upper end surface of the chimney 40 is sealed so as not to scatter contaminants such as organic substances.
The lower part of the chimney 40 is suspended and supported by cutting the entire periphery by the cutting / disassembling apparatus 20 or 20 ′ of the present invention. The chimney 40 operates and operates the cutting / disassembling apparatus 20 or 20 ′ of the present invention as described in the first and second embodiments to sequentially proceed with cutting / disassembling, and the vertical jack 21 is moved to the cutting trace. Is installed and supported as in the above-described embodiment to stabilize or fix the position. Then, as described above in each of the above embodiments, as the cutting and dismantling proceed, the suspension means and the vertical jack 21 are controlled to gradually lower the lower end position of the chimney 40.

次に、図9は、上記実施例の煙突40の背が極めて高く、地面上のクレーン41から立ち上げたブーム44の先端から下ろしたワイヤー45による一体的吊り支持では危険であるか困難な場合の実施例を概念的に示している。
図9の場合は、地上から煙突40の外周に沿う足場50を組み上げてゆき、同煙突40の上半部を吊り支持することに無理の無い高さ位置に作業フロア51を構築している。同作業フロア51の上に、上記構成の切断・解体装置20又は20’を揚重して搬入し設備している。更に、前記作業フロア51の外周部と上面部は、有機物質等を飛散させない気密遮蔽構造の防塵建屋52で取り囲んでいる。煙突40は、予めその上半部を、地上のクレーンから立ち上げたブーム44の先端から下ろしたワイヤー45で吊り支持している。
同煙突40の上半部は、前記作業フロア51上のレベルにおいて、上記構成の切断・解体装置20又は20’により切断することにより、実質的に吊り支持の状態とされる。そして、上記実施例のように切断と共にその切断跡へ垂直ジャッキ21を設置して上向きに支持させることにより、ふらつきの無い安定で安全な支持状態が達成される。
上記した実施例と同様な切断・解体工程の進行に従い、吊り支持した煙突上半部は徐々に下げてゆく。そして、作業フロア51のレベル以上の煙突上半部分の切断・解体が完了した段階で、防塵建屋52を解体撤去し、切断・解体装置20又は20’を地上へ降ろす。更に作業フロア51及び足場50の解体を順次に進める。
その後は上記図8に示した場合と同じ要領で、地上レベルでの切断・解体に切り換え、煙突下半部の完全な切断・解体を達成することになる。
Next, FIG. 9 shows a case where the chimney 40 of the above embodiment is extremely tall, and it is dangerous or difficult to integrally suspend support by the wire 45 lowered from the tip of the boom 44 raised from the crane 41 on the ground. The example of this is shown notionally.
In the case of FIG. 9, the scaffold 50 along the outer periphery of the chimney 40 is assembled from the ground, and the work floor 51 is constructed at a height that makes it impossible to suspend and support the upper half of the chimney 40. On the work floor 51, the cutting / disassembling apparatus 20 or 20 ′ having the above-described configuration is lifted up and installed. Further, the outer peripheral portion and the upper surface portion of the work floor 51 are surrounded by a dust-proof building 52 having an airtight shielding structure that does not scatter organic substances or the like. The chimney 40 suspends and supports the upper half of the chimney 40 in advance with a wire 45 lowered from the tip of a boom 44 raised from a ground crane.
The upper half of the chimney 40 is substantially suspended by being cut at the level on the work floor 51 by the cutting / disassembling apparatus 20 or 20 ′ having the above-described configuration. Then, as in the above-described embodiment, by installing the vertical jack 21 on the cut trace and supporting it upward, a stable and safe support state without wobbling is achieved.
As the cutting and dismantling process similar to that in the above-described embodiment proceeds, the upper half of the chimney that is supported by suspension is gradually lowered. Then, at the stage where cutting and dismantling of the upper half of the chimney above the level of the work floor 51 is completed, the dustproof building 52 is dismantled and the cutting / dismantling apparatus 20 or 20 ′ is lowered to the ground. Further, the work floor 51 and the scaffold 50 are sequentially disassembled.
Thereafter, in the same manner as in the case shown in FIG. 8, switching to cutting and dismantling at the ground level is performed, and complete cutting and dismantling of the lower half of the chimney is achieved.

以上に本発明を図示した実施例に基づいて説明したが、もとより本発明は実施例の構成に限定されるものではない。いわゆる当業者が必要に応じて行うであろう設計変更その他の応用、改変の範囲まで含むことを念のため申し添える。   Although the present invention has been described based on the illustrated embodiment, the present invention is not limited to the configuration of the embodiment. I would like to remind you that it includes the scope of design changes and other applications and modifications that will be performed by those skilled in the art as needed.

2 原子炉遮蔽壁(大型筒状構造物)
10 ワイヤーソー
11 コ字形ガイド枠
11a 前向き腕部
12a 可動ガイドシーブ
13a 駆動部
13b 張力制御部
13 駆動制御部
3 作業フロア
14 作業車両
20 切断・解体装置
20’ 切断・解体装置
21 垂直ジャッキ
40 煙突
41 作業フロア
51 作業フロア
2 Reactor shielding wall (large cylindrical structure)
DESCRIPTION OF SYMBOLS 10 Wire saw 11 U-shaped guide frame 11a Forward arm part 12a Movable guide sheave 13a Drive part 13b Tension control part 13 Drive control part 3 Work floor 14 Work vehicle 20 Cutting / demolition apparatus 20 'Cutting / demolition apparatus 21 Vertical jack 40 Chimney 41 Work floor 51 Work floor

Claims (6)

A)大型筒状構造物の上部を吊り手段により吊って支持させ、
B)平面視において前端を開放されたコ字形状をなしワイヤーソーを周回走行させる水平なコ字形ガイド枠を備え、ワイヤーソーは前記開放部間を横断する配置でコ字形ガイド枠に沿って周回走行するように駆動され、前記開放部間を横断する部分のワイヤーソーはコ字形ガイド枠の前方へ突き出した前向き腕部に沿って前後方向へ移動自在に設置した可動ガイドシーブにより開放部間を前後方向へ平行移動として変位する構成とされ、コ字形ガイド枠の後背部にワイヤーソーを周回走行させる駆動部と張力制御部及び前記可動ガイドシーブを移動させる機構の制御部を含む駆動制御部を備えたワイヤーソー型切断機を、作業フロア上を移動自在な作業車両の前部へ、コ字形ガイド枠が上下方向へ平行移動可能に支持させて成る切断・解体装置を、大型筒状構造物に既設の又は後付けで用意した作業フロア上へ搬入する段階と、
C)前記切断・解体装置は、ワイヤーソー型切断機のコ字形ガイド枠を前向きの水平姿勢として大型筒状構造物の外周へ押し付けるように前進させ、コ字形ガイド枠の開放部が大型筒状構造物の外周を抱持する配置とし、同コ字形ガイド枠に沿って周回走行し前記開放部間を横断するワイヤーソーを前記可動ガイドシーブにより前向き腕部に沿って前方へ平行移動として変位させつつ駆動させることにより、同ワイヤーソーの高さ位置における水平切断を、大型筒状構造物の該当する周方向部分について進める工程と、
D)前記水平切断を目標位置まで進めた段階で、次にはワイヤーソー型切断機のコ字形ガイド枠を垂直上向き又は下向き方向へ平行移動させて垂直切断を行う工程と、
E)前記垂直切断が目標位置へ到達した段階で、ワイヤーソー型切断機のワイヤーソーを前向き腕部に沿って後方へ平行移動として変位させつつ駆動することで、又は作業フロア上を移動自在な作業車両を後方へ後退移動させることにより戻りの水平切断を進め、大型筒状構造物の一部分を切り取る工程と、
F)切り取り片は、作業フロア上へ搬入して用意した運搬車で指定場所へ運び出して最終処分に供する処理を行い、大型筒状構造物において前記切り取り片を切り取った切除跡へ垂直ジャッキを設置して大型筒状構造物の下部を支持させる工程と、
G)以下、上記同様の工程を順次大型筒状構造物の周方向へ繰り返し進めて大型筒状構造物の切断・解体を行うことを特徴とする、鉄筋コンクリート造等で成る大型筒状構造物の切断・解体工法。
A) The upper part of the large cylindrical structure is suspended and supported by the suspension means,
B) It is provided with a horizontal U-shaped guide frame that has a U-shape with its front end open in plan view and runs around the wire saw, and the wire saw circulates along the U-shaped guide frame in an arrangement that crosses between the open portions. The portion of the wire saw that is driven to travel and crosses between the open portions is moved between the open portions by a movable guide sheave that is movably installed in the front-rear direction along the forward arm portion protruding forward of the U-shaped guide frame. A drive control unit configured to displace as a parallel movement in the front-rear direction, including a drive unit that rotates the wire saw around the back of the U-shaped guide frame, a tension control unit, and a control unit of a mechanism that moves the movable guide sheave. Cutting and dismantling equipment with a U-shaped guide frame supported by a wire-saw type cutting machine that is movable on the work floor so that it can move in parallel in the vertical direction. And a step of carrying the large tubular structures in existing or retrofitted prepared in the working floor on,
C) The cutting / disassembling apparatus advances the U-shaped guide frame of the wire saw-type cutting machine so as to press the outer periphery of the large cylindrical structure in a forward-facing horizontal posture, and the open portion of the U-shaped guide frame is a large cylindrical shape. The wire saw that runs around the U-shaped guide frame and crosses between the open parts is displaced as a parallel movement forward along the forward arm by the movable guide sheave. While driving while moving the horizontal cutting at the height position of the wire saw about the corresponding circumferential portion of the large cylindrical structure,
D) At the stage where the horizontal cutting is advanced to the target position, next, the step of performing vertical cutting by translating the U-shaped guide frame of the wire saw type cutting machine vertically upward or downward, and
E) When the vertical cutting reaches the target position, the wire saw of the wire saw type cutting machine is driven while being displaced as a parallel movement backward along the forward arm, or can be moved on the work floor. A step of moving the work vehicle backward to advance the horizontal cutting of the return and cutting off a part of the large cylindrical structure;
F) Cut pieces are transported to the work floor and transported to a designated place for final disposal. A vertical jack is installed on the cut trace of the cut pieces in a large cylindrical structure. And supporting the lower part of the large cylindrical structure,
G) Hereinafter, a large cylindrical structure made of reinforced concrete or the like, characterized by sequentially repeating the same process in the circumferential direction of the large cylindrical structure to cut and disassemble the large cylindrical structure. Cutting and dismantling methods.
a)大型筒状構造物の上部を吊り手段により吊って支持させ、
b)平面視において前端を開放されたコ字形状をなしワイヤーソーを周回走行させる水平なコ字形ガイド枠を、少なくとも上下2段に積層した配置とし、且つ各コ字形ガイド枠は個別に垂直方向へ平行移動可能な構成とし、ワイヤーソーは、前記各コ字形ガイド枠の開放部間を横断する配置で各コ字形ガイド枠に沿って周回走行するように駆動され、前記開放部間を横断する部分のワイヤーソーはコ字形ガイド枠を形成する前向き腕部に沿って前後方向へ移動自在に設置した可動ガイドシーブにより開放部間を前後方向へ平行移動として変位する構成とされ、各コ字形ガイド枠の後背部にワイヤーソーを周回走行させる駆動部と張力制御部及び前記可動ガイドシーブを移動させる機構の制御部を含む駆動制御部を備えた複数段のワイヤーソー型切断機を、作業フロア上を移動自在な作業車両の前部へ、各コ字形ガイド枠を上下方向への平行移動が自在に支持させて成るマルチ型切断・解体装置を、大型筒状構造物の下方部位に既設の又は後付けで用意した作業フロア上へ搬入する段階と、
c)前記マルチ型切断・解体装置は、ワイヤーソー型切断機の各コ字形ガイド枠の開放部を前向きの水平姿勢とし、且つ各コ字形ガイド枠間の垂直方向の間隔を切断片の切り取り高さに設定した状態で大型筒状構造物の外周へ押し付けるように前進させ、各コ字形ガイド枠の開放部が大型筒状構造物の外周を抱持する配置とし、同コ字形ガイド枠に沿って周回走行し前記開放部間を横断するワイヤーソーを可動ガイドシーブにより前向き腕部に沿って前方へ平行移動として変位させつつ周回走行させることで、各ワイヤーソーの高さ位置における複数層の水平切断を、大型筒状構造物の該当する周方向部分について進める工程と、
d)前記の水平切断を目標位置まで進めた段階で、次にはワイヤーソー型切断機のコ各字形ガイド枠を垂直上向き又は下向き方向へ平行移動させて垂直切断を行う工程と、
e)前記垂直切断が目標の位置へ到達した段階で、各ワイヤーソー型切断機のワイヤーソーを前向き腕部に沿って後方へ平行移動として変位させつつ駆動することで、又は作業フロア上を移動自在な作業車両を後方へ後退移動させることにより戻りの水平切断を進めて大型筒状構造物の複数箇所を切り取る工程と、
f)切り取り片は、作業フロア上へ搬入して用意した運搬車で指定場所へ運び出して最終処分に供する処理を行い、大型筒状構造物において前記切り取り片を切り取った切除跡へ垂直ジャッキを設置して大型筒状構造物の下部を支持させる工程と、
g)以下、上記同様の工程を順次大型筒状構造物の周方向へ繰り返し進めて大型筒状構造物の切断・解体を行うことを特徴とする、鉄筋コンクリート造等で成る大型筒状構造物の切断・解体工法。
a) The upper part of the large cylindrical structure is suspended and supported by the suspension means,
b) A horizontal U-shaped guide frame that is formed in a U-shape with the front end open in plan view and that runs around the wire saw is stacked in at least two stages, and each U-shaped guide frame is individually vertically oriented. The wire saw is driven so as to run around each U-shaped guide frame in an arrangement that crosses between the open portions of each of the U-shaped guide frames, and crosses between the open portions. The wire saw of the part is configured to be displaced as a parallel movement in the front-rear direction between the open parts by a movable guide sheave installed so as to be movable in the front-rear direction along the forward arm part forming the U-shaped guide frame. A multi-stage wire saw provided with a drive control section including a drive section for rotating the wire saw around the back of the frame, a tension control section, and a control section for a mechanism for moving the movable guide sheave. A multi-type cutting and disassembling device that has a cutting machine supported on the front of a work vehicle that can move on the work floor and each U-shaped guide frame that can be moved in parallel in the vertical direction. A stage to be carried on a work floor that is already installed in a lower part of or prepared later,
c) In the multi-type cutting / disassembling apparatus, the open portion of each U-shaped guide frame of the wire saw-type cutting machine is set to a forward horizontal posture, and the vertical interval between the U-shaped guide frames is set to a cutting height of the cut piece. In such a state, it is advanced so as to press against the outer periphery of the large cylindrical structure, and the opening part of each U-shaped guide frame holds the outer periphery of the large cylindrical structure, and follows the same U-shaped guide frame. By moving the wire saw that circulates and traverses between the open parts while being displaced as a parallel movement forward along the forward arm by a movable guide sheave, horizontal movement of a plurality of layers at the height position of each wire saw A process of proceeding cutting for the corresponding circumferential portion of the large tubular structure;
d) at the stage where the horizontal cutting is advanced to the target position, and then performing the vertical cutting by translating the U-shaped guide frames of the wire saw type cutting machine vertically upward or downward; and
e) When the vertical cutting reaches the target position, the wire saw of each wire saw type cutting machine is driven while being displaced as a parallel movement backward along the forward arm, or moved on the work floor. A step of moving the flexible work vehicle backward to advance the horizontal cutting of the return to cut out a plurality of locations of the large cylindrical structure;
f) Cut pieces are transported to the work floor and transported to the designated place by a transported vehicle for final disposal. A vertical jack is installed on the cut trace of the cut pieces in a large cylindrical structure. And supporting the lower part of the large cylindrical structure,
g) Hereinafter, a large cylindrical structure made of reinforced concrete or the like, characterized in that the same steps as described above are sequentially repeated in the circumferential direction of the large cylindrical structure to cut and disassemble the large cylindrical structure. Cutting and dismantling methods.
大型筒状構造物の切断・解体の工程が、周方向へ一周分進んだ段階で、同大型筒状構造物の上部を吊って支持させた吊り手段及び同大型筒状構造物の下端部を支持する垂直ジャッキを操作して、上記切り取り片の高さ寸法相当分だけ下降させ、その下端部を垂直ジャッキで支持させた後に、上記の切断工程を順次周方向へ進めて大型筒状構造物の切断・解体を行うことを特徴とする、請求項1又は2に記載した鉄筋コンクリート造等で成る大型筒状構造物の切断・解体工法。   At the stage where the cutting and dismantling process of the large cylindrical structure has advanced one round in the circumferential direction, the suspension means that suspends and supports the upper part of the large cylindrical structure and the lower end portion of the large cylindrical structure Operate the supporting vertical jack and lower it by an amount corresponding to the height dimension of the cut piece, and support the lower end of the cut piece with the vertical jack. The method for cutting / disassembling a large cylindrical structure made of reinforced concrete or the like according to claim 1 or 2, characterized in that cutting and disassembling is performed. 大型筒状構造物の下端部を支持する垂直ジャッキは、大型筒状構造物へ後付けで構築した作業フロアの特定位置へ組み込んで設備し、必要に応じて作業フロアの床面から起立させる駆動制御を行って大型筒状構造物の下端部を支持させることを特徴とする、請求項1又は2に記載した鉄筋コンクリート造等で成る大型筒状構造物の切断・解体工法。   The vertical jack that supports the lower end of the large cylindrical structure is installed and installed at a specific position on the work floor retrofitted to the large cylindrical structure, and is driven from the floor of the work floor as needed. The method for cutting and dismantling a large cylindrical structure made of reinforced concrete or the like according to claim 1 or 2, wherein the lower end of the large cylindrical structure is supported. イ)大型筒状構造物の作業フロア上の位置で、同大型筒状構造物を切断・解体するワイヤーソー型切断・解体装置であって、
ロ)平面視において前端を開放されたコ字形状をなしワイヤーソーを周回走行させる水平なコ字形ガイド枠を備え、ワイヤーソーは前記開放部間を横断する配置でコ字形ガイド枠に沿って周回走行するように駆動され、前記開放部間を横断する部分のワイヤーソーはコ字形ガイド枠を形成する前向き腕部に沿って前後方向へ移動自在に設置した可動ガイドシーブにより開放部間を前後方向へ平行移動として変位する構成とされており、同コ字形ガイド枠の後背部に、ワイヤーソーを周回走行させる駆動部と張力制御部及び前記可動ガイドシーブを移動させる機構の制御部を含む駆動制御部を備えたワイヤーソー型切断機が、前記作業フロア上を移動自在な作業車両の前部へ、前記コ字形ガイド枠が上下方向への平行移動が自在に支持されており、
ハ)前記ワイヤーソー型切断機の駆動制御部及び作業車両は遠隔制御による操縦が可能に構成されており、
ニ)大型筒状構造物の作業フロア上へ搬入され、ワイヤーソー型切断機のコ字形ガイド枠の開放部を前向きとした水平姿勢で大型筒状構造物に向かって押し付けるように前進させ、同コ字形ガイド枠の開放部が大型筒状構造物の外周を抱持する配置として、同コ字形ガイド枠の開放部間を横断するワイヤーソーを前向き腕部に沿って移動する可動ガイドシーブにより前方へ平行移動として変位させつつ駆動することで水平切断を進め、コ字形ガイド枠を垂直上向き又は下向き方向へ平行移動させることで垂直切断を行い、更にワイヤーソーを前向き腕部に沿って後方へ平行移動として変位させる駆動を行うこと、又は作業フロア上を移動自在な作業車両を後方へ後退移動させることにより戻りの水平切断を進めて大型筒状構造物の切断・解体を行う構成であることを特徴とする、鉄筋コンクリート造等で成る大型筒状構造物の切断・解体装置。
B) A wire saw type cutting / disassembling device for cutting / disassembling the large cylindrical structure at a position on the work floor of the large cylindrical structure,
B) It has a U-shaped guide frame that has a U-shape with its front end open in plan view, and has a horizontal U-shaped guide frame that runs around the wire saw. The wire saw that is driven to travel and crosses between the open parts is moved forward and backward between the open parts by a movable guide sheave that is movably installed in the front and rear direction along the forward arm part that forms a U-shaped guide frame. Drive control including a drive unit for rotating the wire saw and a tension control unit and a control unit for the mechanism for moving the movable guide sheave on the back of the U-shaped guide frame. A wire saw type cutting machine having a section is supported to the front part of a work vehicle movable on the work floor, and the U-shaped guide frame is supported in a vertical translation direction. ,
C) The drive control unit and work vehicle of the wire saw type cutting machine are configured to be capable of being controlled by remote control.
D) It is carried onto the work floor of the large cylindrical structure and advanced so as to press it toward the large cylindrical structure in a horizontal posture with the open part of the U-shaped guide frame of the wire saw type cutting machine facing forward. As an arrangement where the open part of the U-shaped guide frame embraces the outer periphery of the large cylindrical structure, the wire saw that crosses between the open parts of the U-shaped guide frame is moved forward by a movable guide sheave that moves along the forward arm part. By moving while moving as a parallel movement, the horizontal cutting is advanced, the U-shaped guide frame is moved vertically upward or downward, the vertical cutting is performed, and the wire saw is paralleled backward along the forward arm. Cutting and dismantling of large cylindrical structures by driving to displace as movement, or by moving the work vehicle movable on the work floor backwards to advance the horizontal cutting of the return Characterized in that it is configured to perform, cutting and disassembling apparatus of a large tubular structure made in reinforced concrete or the like.
イ’)大型筒状構造の作業フロア上の位置で、同大型筒状構造物をマルチ手法にて切断・解体するワイヤーソー型切断・解体装置であって、
ロ’)平面視において前端を開放されたコ字形状をなしワイヤーソーを周回走行させるコ字形ガイド枠を水平姿勢で少なくとも上下2段に積層した配置とし、且つ各コ字形ガイド枠は個別に垂直方向へ平行移動可能な構成で備えており、ワイヤーソーは、前記の各コ字形ガイド枠の開放部間を横断する配置で、同コ字形ガイド枠に沿って周回走行するように駆動され、前記開放部間を横断する部分のワイヤーソーはコ字形ガイド枠を形成する前向き腕部に沿って前後方向へ移動自在に設置した可動ガイドシーブにより開放部間を前後方向へ平行移動として変位する構成とされており、各コ字形ガイド枠の後背部にそれぞれ、ワイヤーソーを走行させる駆動部と張力制御部及び前記可動ガイドシーブを移動させる機構の制御部を含む駆動制御部を備えた少なくとも2台のワイヤーソー型切断機が、前記作業フロア上を移動自在な作業車両の前部へ、各コ字形ガイド枠が個別に上下方向への平行移動が自在に支持されており、
ハ’)前記ワイヤーソー型切断機の駆動制御部及び作業車両は遠隔制御による操縦が可能に構成されており、
ニ’)大型筒状構造物の作業フロア上へ搬入され、前記ワイヤーソー型切断機の各コ字形ガイド枠を前向きとした水平姿勢で大型筒状構造物に向かって押し付けるように前進させ、各コ字形ガイド枠の開放部が大型筒状構造物の外周を抱持する配置とし、同コ字形ガイド枠の開放部間を横断するワイヤーソーを前向き腕部に沿って移動する可動ガイドシーブにより前方へ平行移動として変位させつつ駆動することで水平切断を進め、次いで各コ字形ガイド枠を垂直上向き又は下向き方向へ平行移動させることで垂直切断を行い、更にワイヤーソーを前向き腕部に沿って後方へ平行移動として変位させつつ駆動することで、又は作業フロア上を移動自在な作業車両を後方へ後退移動させることにより戻りの水平切断を進めて、大型筒状構造物の切断・解体を行うことを特徴とする、コンクリート造等で成る大型筒状構造物のマルチ型切断・解体装置。
B) A wire saw type cutting / disassembling device that cuts and disassembles the large cylindrical structure by a multi-method at a position on the work floor of the large cylindrical structure,
B) A U-shaped guide frame that has a U-shape with the front end open in plan view and that runs around a wire saw is stacked in at least two levels in a horizontal position, and each U-shaped guide frame is individually vertical. The wire saw is arranged so as to traverse between the open portions of each of the U-shaped guide frames, and is driven to run around the U-shaped guide frames. The wire saw of the part crossing between the open parts is configured to be displaced as a parallel movement between the open parts in the front-rear direction by a movable guide sheave installed so as to be movable in the front-rear direction along the forward arm part forming the U-shaped guide frame. A drive control unit including a drive unit for running the wire saw, a tension control unit, and a control unit for a mechanism for moving the movable guide sheave, respectively, at the back of each U-shaped guide frame. At least two wire saw-type cutting machines provided are supported to the front part of the work vehicle movable on the work floor, and each U-shaped guide frame is individually supported to freely translate in the vertical direction.
C) The drive control unit and work vehicle of the wire saw type cutting machine are configured so that they can be controlled by remote control.
D ') It is carried onto the work floor of the large cylindrical structure, and is advanced so as to press the U-shaped guide frame of the wire saw type cutting machine toward the large cylindrical structure in a horizontal posture with the forward direction. The open part of the U-shaped guide frame is arranged to hold the outer periphery of the large cylindrical structure, and the wire saw that crosses between the open parts of the U-shaped guide frame is moved forward by a movable guide sheave that moves along the forward arm part. The horizontal cutting is performed by driving while being displaced as a parallel movement, and then the vertical cutting is performed by translating each U-shaped guide frame vertically upward or downward, and the wire saw is moved backward along the forward arm portion. By moving as a parallel movement to the rear or by moving the work vehicle movable on the work floor backwards to advance the horizontal cutting of the return to cut the large cylindrical structure. A multi-type cutting / disassembling device for large cylindrical structures made of concrete or the like, characterized by cutting and dismantling.
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JP6894194B2 (en) * 2016-05-30 2021-06-30 清水建設株式会社 Cutting device and dismantling device
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JP7281738B2 (en) * 2019-07-04 2023-05-26 株式会社 中部ロックドリルサービス SRC disconnector and vehicle with SRC disconnector
CN112227814B (en) * 2020-09-29 2022-04-15 中国化学工程第六建设有限公司 Method for dismantling straight-barrel type concrete tower body
JP7562474B2 (en) * 2021-05-13 2024-10-07 三菱重工業株式会社 Composite cutting device and method
JP7569774B2 (en) 2021-10-14 2024-10-18 鹿島建設株式会社 Cutting device and cutting method
CN114704122B (en) * 2022-04-19 2023-12-01 北京首钢建设集团有限公司 Method for dismantling roof of existing building

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JP2545736B2 (en) * 1993-12-14 1996-10-23 科学技術庁原子力局長 Cutting method and cutting device using wire saw
JPH07269266A (en) * 1994-03-29 1995-10-17 Hazama Gumi Ltd Excavation method and excavator using wire saw
JPH08194097A (en) * 1995-01-18 1996-07-30 Toshiba Eng Co Ltd Cutting apparatus and cutting method for nuclear furnace shielding wall
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