US 12,276,123 B2
Dismantling method of tower-type wind power generation system
Yoshihide Yoshino, Tokyo (JP); and Masaharu Takemoto, Tokyo (JP)
Assigned to BESTERRA CO., LTD., Tokyo (JP)
Appl. No. 18/016,996
Filed by BESTERRA CO., LTD., Tokyo (JP)
PCT Filed Jul. 20, 2020, PCT No. PCT/JP2020/028099
§ 371(c)(1), (2) Date Jan. 19, 2023,
PCT Pub. No. WO2022/018797, PCT Pub. Date Jan. 27, 2022.
Prior Publication US 2024/0026698 A1, Jan. 25, 2024
Int. Cl. E04G 23/06 (2006.01); F03D 13/00 (2016.01); F03D 80/00 (2016.01)
CPC E04G 23/06 (2013.01) [F03D 13/00 (2016.05); F03D 80/011 (2023.08); F05B 2230/60 (2013.01); F05B 2230/70 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A dismantling method of a tower type tower wind power generation system including a hollow tower body and a wind power generator provided in an upper end part of the hollow tower body, an upward-tapering part provided in the upper end part of the hollow tower body, the method comprising:
an inner column building step of building an inner column extending to an upper side of a lower end part of the upward-tapering part inside an internal cavity of the hollow tower body;
a tower body-upper part supporting step of applying an upward supporting force equal to or larger than a load of an entire system above the upward-tapering part to the upward-tapering part by a jack provided in an upper part of the inner column via an abutting support member that abuts on a predetermined position on an inner wall of the upward-tapering part of the hollow tower body;
a work bench setting step of suspending a work bench on which a worker can climb and perform work from an upper part of the hollow tower body in a liftable manner;
a tapering part-lower part removal step of cutting and removing, over an entire periphery of the hollow tower body, a predetermined region lower than an abutting position of the abutting support member of the upward-tapering part in a supported state by an operation on the work bench;
a tapering part lowering and placing step of, after the tapering part-lower part removal step, lowering and placing, by the jack, a remaining upward-tapering part on a placement protrusion on which an entire system above the upward-tapering part is placeable provided in a protruding manner on an inner wall of the hollow tower body remaining on a lower side;
an uppermost part of lower part removal step of using the work bench to cut and remove a predetermined range of an uppermost part of the hollow tower body remaining on a lower side over an entire periphery of the hollow tower body after the tapering part-lower part removal step;
an inner column shortening step of removing a lower end part of the inner column in a state where the inner column is suspended from a remaining upward-tapering part and lowering the inner column from which the lower end part is removed on a ground in the internal cavity; and
a lowering and removal repeating step of repeating the tapering part lowering and placing step, the uppermost part of lower part removal step, and the inner column shortening step.