Abstract: Provided is a dismantling method of a tower-type wind power generation system in which scaffolding is not required around a tower body. After climbing on a work bench set outside an outer wall of a tower body and removing a lower end part of an upward-tapering part in an upper end part of the tower body over the entire periphery of the tower body, the tower body is sequentially removed from an uppermost part of a cylindrical part of the tower body below the upward-tapering part to gradually dismantle the tower body from the top. The remaining upward-tapering part of the tower body from which the lower end part is dismantled first is supported by a jack provided in an inner column while being lowered, along with the dismantling, into an internal cavity of the cylindrical part of the tower body below the upward-tapering part and is placed on a placement protrusion provided on an inner wall of the tower body.

Abstract: To provide a method of toppling a tower structure more safely, simply and quickly than in the conventional manner.

Abstract: A method for disassembling a tower-type wind power generation facility eliminates scaffolding to be set up on the periphery of a tower body. An inner tower of a tower crane is built in an inner hollow of a tower body to install a crane apparatus at an upper end part, a nacelle and a wind power generator at an upper end part of the tower body are disassembled, the resulting disassembled objects are lowered through the outside of the tower body using the crane apparatus of the tower crane in the tower body, a working stage is provided on the inner tower after the wind power generator is disassembled, the tower body is disassembled via this stage provided on the inner tower, and the disassembled objects are lowered through the outside of the tower body using the crane apparatus of the tower crane.

Abstract: A demolishing method utilizes an aggregate stack demolishing scaffold apparatus mounted to an upper part of an aggregate stack including four smoke funnels arranged adjacent to each other. An uneven scaffold including one plate-shaped upper scaffold portion is placed on an upper end of each smoke funnel. A lower scaffold portion is coupled to the upper scaffold portion and located in lower positions in the smoke funnels with the upper scaffold portion being placed on the upper ends of the smoke funnels. A chain block suspends and supports the uneven scaffold from and on an inner wall of each smoke funnel, and adjusts a suspending height. With this configuration, the upper scaffold portion is located on the upper ends of the smoke funnels, and thus there is no possibility of contact between the scaffolds in the smoke funnels causing a worker to lose his balance, thereby improving safety.

Abstract: There is provided an aggregate stack demolishing scaffold apparatus capable of easily demolishing even an aggregate stack with safety at low cost, and a demolishing method using the apparatus. An aggregate stack demolishing scaffold apparatus 10 to be mounted to an upper part of an aggregate stack 130 including four smoke funnels 132 arranged adjacent to each other includes: an uneven scaffold including a one plate-shaped upper scaffold portion 14 that can be placed on an upper end of each smoke funnel 132, and lower scaffold portions 18 coupled to the upper scaffold portion 14 and located in lower positions in the smoke funnels 132 with the upper scaffold portion 14 being placed on the upper ends of the smoke funnels 132; and a chain block 28 capable of suspending and supporting the uneven scaffold from and on an inner wall of each smoke funnel 132, and adjusting a suspending height.

Abstract: A method for disassembling a boiler supported and suspended by a supporting structure which includes the steps of cutting off a lower part of a furnace unit to provide an enlarged opening; fixing a first support to the furnace unit at approximately same height as a lower end of a heat recovery area; fixing a second support to the lower end of the heat recovery area; providing a first jacking apparatus and a second jacking apparatus under the first support and the second support, respectively; detaching the boiler from the suspending structure; lowering the first support and the second support by the first jacking apparatus and the second jacking apparatus, cutting a lower part of the boiler, repeating the lowering and the disassembling steps until the first support and the second support are lowered to a maximum extent; and disassembling a remaining upper part of the boiler.

Abstract: A method for disassembling a boiler supported on a supporting structure is disclosed. The method includes a holder installation step for providing a vertically extendable ascent-descent holder below the boiler; a holder lifting step for increasing a height of the ascent-descent holder to a position close to or in contact with a lower end of the boiler; a cutting step for cutting off a lower part of the boiler, the lower part extending from the lower end of the boiler to a predetermined height; and a removal step for removing the lower part from the holder, after the lower part being cut off and the weight of the lower part being transferred to the ascent-descent holder; the holder installation step, the holder lifting step, the cutting step, and the removal step are repeatedly carried out for successively disassembling the boiler from a bottom side thereof.