Method for dismantling structure

Abstract

A method for dismantling a structure according to the present invention has a step for specifying a portion of the structure that is to be damaged, a step for covering the portion that is to be damaged with a polymer material, and a step for damaging the portion that is to be damaged as covered with the polymer material.

Description

How to demolish a structure

[0001] The present disclosure relates to a method for dismantling a structure.

[0002] Patent Document 1 discloses a demolition method for dismantling an existing steel tower. This demolition method includes a step of cutting the upper tower body at a cutting position to separate a unit tower body from the lower part of the upper tower body, and a step of transporting the unit tower body to the outside and removing it.

[0003] JP 2010-1649 A

[0004] However, in the demolition method for dismantling an existing steel tower disclosed in Patent Document 1, there is a risk that dust such as chips and debris produced when cutting the upper tower body will fly around.

[0005] In view of the above circumstances, at least one embodiment of the present invention aims to provide a structure demolition method that can suppress the scattering of dust when a structure is demolished.

[0006] A method for dismantling a structure according to at least one embodiment of the present invention comprises the steps of: identifying a portion of the structure to be damaged; covering the portion to be damaged with a polymer material; and damaging the portion to be damaged that is covered with the polymer material.

[0007] According to at least one embodiment of the present invention, the area to be damaged is covered with a polymer material, so that scattering of dust generated at the area can be suppressed.

[0008] 10 is a diagram showing a schematic view of a structure; FIG. 11 is a diagram showing a method for dismantling the structure shown in FIG. 1; FIG. 12 is a cross-sectional view showing a groove appearing in the outer surface of the portion of the structure to be damaged; FIG. 13 is a diagram showing a hole penetrating from the outside to the inside hollow portion of the portion of the structure to be damaged; FIG. 14 is a diagram showing a step of covering the portion of the structure to be damaged with a sheet-like polymer material; FIG. 15 is a cross-sectional view showing a step of covering the outer and inner surfaces of the portion of the structure to be damaged with a polymer material; FIG. 16 is a cross-sectional view showing a step of pouring a polymer material from the outside to the inside of the portion of the structure to be damaged; FIG. 17 is a diagram showing a meteorological observation tower; FIG. 18 is a diagram showing a method for dismantling the meteorological observation tower shown in FIG. 8; FIG. 19 is a diagram showing a wind turbine; FIG. 19 is a diagram showing a method for dismantling the wind turbine shown in FIG. 10; FIG. 19 is a diagram showing the portion of a wind turbine blade to be damaged; FIG. 20 is a cross-sectional view showing a groove appearing in the outer surface of the portion of the wind turbine blade to be damaged; FIG. 21 is a cross-sectional view showing a hole penetrating from the outside to the inside hollow portion of the portion of the wind turbine blade to be damaged; FIG. 22 is a diagram showing a step of covering the portion of the wind turbine blade to be damaged with a sheet-like polymer material; FIG. 23 is a cross-sectional view showing a step of covering the outer and inner surfaces of the portion of the wind turbine blade to be damaged with a polymer material. FIG. 10 is a diagram showing a step of pouring a polymer material into a hollow portion from the outside to the inside of the portion of the wind turbine blade to be damaged.

[0009] Several embodiments of the present invention will be described below with reference to the accompanying drawings. However, the dimensions, materials, shapes, and relative arrangements of components described in the embodiments or shown in the drawings are merely illustrative and are not intended to limit the scope of the present invention. For example, expressions expressing relative or absolute arrangements, such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial," not only strictly express such arrangements, but also express relative displacements with tolerances or angles or distances to the extent that the same function is achieved. Furthermore, expressions expressing shapes such as a rectangular or cylindrical shape not only express shapes such as a rectangular or cylindrical shape in the strict geometric sense, but also express shapes including concave and convex portions, chamfered portions, etc., to the extent that the same effect is achieved. On the other hand, expressions such as "comprise," "comprise," "include," "include," or "have" of one component are not exclusive expressions that exclude the presence of other components.

[0010] [Method for Dismantling a Structure] Fig. 1 is a diagram schematically illustrating a structure 10. Fig. 2 is a diagram schematically illustrating a method for dismantling the structure shown in Fig. 1. The structure 10 to which the method for dismantling a structure according to the embodiment is applied is not limited in shape, structure, or material. The method for dismantling a structure according to the embodiment is applicable to structures such as meteorological observation towers, wind turbines, aircraft, ships, piping, tanks, or automobiles. Here, a method for dismantling a hollow structure 10 extending in the direction of gravity as shown in Fig. 1 will be described as an example, but the method is not limited thereto and may also be applied to a non-hollow structure (a solid structure).

[0011] As shown in Figure 2, the method for dismantling a structure 10 includes a step (S1) of identifying a portion 12 of the structure 10 to be damaged, a step (S2) of covering the portion 12 of the structure 10 to be damaged with a polymer material 14, and a step (S3) of damaging the portion 12 of the structure 10 to be damaged that is covered with the polymer material 14.

[0012] The step (S1) of identifying the portion 12 of the structure 10 to be damaged is a step for identifying a portion 16 where the structure 10 will be cut or bent in two, or a portion that will break when the structure 10 is cut or bent in two, and may include identifying a portion that is expected to be damaged when the falling side of the structure 10, when cut in two, hits the ground or the surface of water. Of the portions 12 where the structure 10 will be damaged, the portion 16 where the structure 10 will be cut or bent in two can be identified arbitrarily, and the portion that will break when the structure is cut or bent in two is identified taking into consideration the breaking strength and the work procedure.

[0013] The portion 12 of the structure 10 to be damaged is a portion that forms a boundary when the structure 10 is cut or bent in two, or a portion that breaks when the structure 10 is cut or bent in two, and may include a portion that is expected to be damaged when the falling side of the cut structure 10 hits the ground or the surface of water. The portion of the structure 10 to be damaged is, for example, a portion that originally has low breaking strength, a connection portion when the structure 10 is constructed, a portion whose breaking strength has been reduced by making a flaw in advance, etc.

[0014] A portion that is originally low in breaking strength is, for example, a portion that is thinner than other portions (thin-walled portion), and can be identified by checking the structure from a drawing, but is not limited to this and may be detected, for example, by ultrasound, etc. Therefore, the step (S1) of identifying the portion of the structure 10 to be damaged may include a step of identifying the portion by ultrasound, etc.

[0015] Furthermore, the step (S1) of specifying the region 12 of the structure 10 to be damaged may include a step of providing a flaw 20 serving as a base point in the region 12 to be damaged, as shown in Figures 3 and 4. The flaw 20 provided in the region 12 to be damaged may be a groove 22 appearing on the outer surface of the structure 10, as shown in Figure 3, or a hole 24 penetrating from the outside to the hollow portion inside the structure 10, as shown in Figure 4. The groove 22 appearing on the outer surface of the structure 10 is, for example, a groove having a V-shaped cross section, but is not limited to this and may be, for example, a groove having a U-shaped cross section. The hole 24 penetrating from the outside to the hollow portion inside the structure 10 is, for example, a rectangular slit, but is not limited to this and may be, for example, a circular hole.

[0016] As shown in Figure 3, step (S2) of covering the portion 12 of the structure 10 to be damaged with a polymer material 14 is a step for suppressing scattering of chips and fragments generated when the structure 10 is cut or bent in two, and fragments generated when the falling side of the cut structure 10 hits the ground or water surface. The polymer material 14 traps the chips and fragments in the structure 10 or prevents them from scattering outside the structure 10. The polymer material 14 that traps the chips and fragments in the structure 10 adheres the chips and fragments to the structure 10, and a polymer material having adhesive properties to which the chips and fragments adhere, or a polymer material having semi-fluidity that encapsulates the chips and fragments, is selected. The polymer material that prevents chips and fragments from scattering outside the structure 10 is a polymer material that covers the outside of the structure 10 and prevents fragments from scattering outside the structure 10 even if the inside of the structure 10 is broken into pieces, and a polymer material that has extensibility and flexibility (shock absorption properties) is selected.

[0017] The polymer material 14 may be, but is not limited to, a thermosetting resin, a thermoplastic resin, rubber, elastomer, wax, grease, polypropylene, nylon, ethylene propylene rubber, urethane, or polyurea, and may be appropriately selected depending on the purpose. For example, a sticky polymer material to which chips and debris adhere is a thermoplastic resin, wax, grease, or other oily substance, and a semi-fluid polymer material that encases chips and debris is a oily substance such as wax or grease. For example, a polymer material that covers the outside of a structure and prevents fragments from scattering even if the inside of the structure is shattered is a rubber, elastomer, or sheet-like polymer material, and a polymer material that has extensibility and flexibility (shock absorption properties) is polyurea, etc.

[0018] Methods of covering the portion 12 of the structure 10 to be damaged with the polymeric material 14 include, but are not limited to, applying or spraying the polymeric material 14 onto the structure 10, or attaching or wrapping a sheet of the polymeric material 14 around the structure 10.

[0019] Therefore, when the polymer material 14 is a sheet-like polymer material, the step (S2) of covering the portion 12 of the structure 10 to be damaged with the polymer material 14 may include a step of covering the portion 12 to be damaged with the sheet-like polymer material 14, as shown in Figure 5.

[0020] As described above, when the structure 10 is hollow, the step (S2) of covering the portion 12 of the structure 10 to be damaged with the polymer material 14 may include a step of covering at least one of the outer surface or inner surface of the portion 12 to be damaged with the polymer material 14, as shown in Fig. 6. Since at least one is covered, only the outer surface of the portion 12 of the structure 10 to be damaged may be covered, or only the inner surface of the portion 12 to be damaged may be covered. Alternatively, both the outer surface and the inner surface of the portion 12 to be damaged may be covered.

[0021] Furthermore, when the structure 10 is hollow, the step (S2) of covering the region 12 of the structure 10 to be damaged with the polymer material 14 may include a step of pouring the polymer material 14 from the outside to the inside of the region 12 to be damaged, as shown in Fig. 7. For example, the hole 26 through which the polymer material 14 is poured from the outside to the inside of the region 12 to be damaged of the structure 10 may be a pre-existing hole, or may be a hole created specifically for pouring the polymer material. Furthermore, the polymer material 14 poured from the outside to the inside of the region 12 of the structure 10 to be damaged may be, for example, an oily substance such as wax, grease, or the like.

[0022] 3, the step (S3) of damaging the target portion 12 of the structure 10 covered with the polymer material 14 is a step of cutting or bending the structure 10 in two at the target portion 12 of the structure 10 covered with the polymer material 14. In the step (S3) of damaging the target portion 12 of the structure 10 covered with the polymer material 14, the structure 10 may be completely cut in two, or an incision may be made in the portion covered with the polymer material 14 and then bent.

[0023] The step (S3) of damaging the portion 12 to be damaged of the structure 10 covered with the polymer material 14 may include a step of sandwiching the portion 12 to be damaged and separating one side from the other side. For example, when the structure 10 extends in the direction of gravity, the step of sandwiching the portion 12 to be damaged and separating one side from the other side may involve separating the lower side 28 in the direction of gravity from the upper side 30 in the direction of gravity and dropping the lower side in the direction of gravity.

[0024] According to the method for dismantling a structure 10 of the embodiment, a step (S2) is included in which the portion 12 of the structure 10 to be damaged is covered with a polymer material 14, so that the portion 12 of the structure 10 to be damaged is covered with the polymer material 14, and the scattering of dust generated in the portion 12 can be suppressed.

[0025] If the step (S1) of identifying the portion 12 of the structure 10 to be damaged includes a step of creating a starting flaw 20 in the portion 12 to be damaged, the starting flaw 20 is created in the portion 12 of the structure 10 to be damaged, and the structure 10 can be damaged using this flaw 20 as a starting point.

[0026] When the polymer material 14 is a sheet-like polymer material and the step (S2) of covering the area 12 of the structure 10 to be damaged with the polymer material 14 includes the step of covering the area 12 to be damaged with the sheet-like polymer material, the area 12 to be damaged is covered with the sheet-like polymer material 14, thereby suppressing the scattering of dust generated in the area 12.

[0027] When the structure 10 is hollow and the step (S3) of covering the portion 12 of the structure 10 to be damaged with a polymer material 14 includes a step of covering at least one of the outer surface or inner surface of the portion 12 to be damaged with a polymer material, at least one of the outer surface or inner surface of the portion 12 to be damaged is covered with the polymer material 14, thereby suppressing the scattering of dust generated in the portion 12.

[0028] If the structure 10 is hollow and the step (S3) of covering the portion 12 of the structure 10 to be damaged with the polymer material 14 includes a step of pouring the polymer material 14 from the outside to the inside of the portion 12 to be damaged, the polymer material 14 is poured from the outside to the inside of the portion 12 to be damaged, and the inside of the portion 12 to be damaged is covered with the polymer material 14, thereby suppressing the scattering of dust generated in the portion 12.

[0029] When the step (S3) of damaging the portion 12 to be damaged of the structure 10 covered with the polymer material 14 includes a step of sandwiching the portion 12 to be damaged and separating one side from the other side, the portion to be damaged is sandwiched and separated from the other side, and the structure 10 is dismantled.

[0030] [Method of Dismantling a Meteorological Observation Tower] Fig. 8 is a diagram that schematically shows a meteorological observation tower 40. Fig. 9 is a diagram that schematically shows a method of dismantling the meteorological observation tower 40 shown in Fig. 8. As shown in Fig. 8, the meteorological observation tower 40 includes a foundation 42 and a tower 44 constructed on the foundation 42. The tower 44 is a structure formed by combining and welding reinforcing bars 46, and measuring instruments 52, 54 for measuring meteorological parameters (e.g., wind direction, wind speed, temperature, air pressure, precipitation, etc.) are installed on each of branch-like protrusions 50 that extend from a tower main body 48.

[0031] The method for dismantling a meteorological observation tower 40 shown in Figure 9 is a method for dismantling a tower main body 48, in which the measuring instruments 52, 54 installed on each of the branch-like protrusions 50 and the branch-like protrusions 50 are removed before dismantling the tower main body 48. As shown in Figure 9, the method for dismantling a meteorological observation tower 40 includes a step (S11) of identifying a portion 56 of the tower main body 48 to be damaged, a step (S12) of covering the portion 56 of the tower main body 48 to be damaged with a polymer material 58, and a step (S13) of damaging the portion 56 of the tower main body 48 to be damaged that is covered with the polymer material 58.

[0032] The step (S11) of identifying the portion 56 of the tower body 48 to be damaged is a step for identifying a portion where the tower body 48 will be cut or bent in two, or a portion that will break when the tower body 48 is cut or bent, and may include identifying a portion that is expected to be damaged when the falling side of the tower body 48, when cut in two, hits the ground or the surface of water. Of the portions where the tower body 48 will be damaged, the portion 60 where the tower body 48 will be cut or bent in two can be identified arbitrarily, and the portion that will break when the tower body 48 is cut or bent in two is identified taking into consideration the breaking strength and the work procedure.

[0033] The damaged portion 56 of the tower body 48 is a portion that forms a boundary when the tower body 48 is cut or bent in two, or a portion that breaks when the tower is cut or bent in two, and may include a portion that is expected to be damaged when the falling side of the cut tower body 48 hits the ground or the surface of water. The damaged portion 56 of the tower body 48 is, for example, a portion that originally has low breaking strength, a connection portion when the tower body 48 is constructed, or a portion that has been made flawed in advance to reduce breaking strength.

[0034] The portion that is originally weaker in strength is, for example, a portion that is thinner than other portions (thin-walled portion), and can be identified by checking the structure from a drawing, but is not limited to this and may be detected, for example, by ultrasound, etc. Therefore, the step of identifying the portion that will damage the tower body 48 may include the step of identifying the portion by ultrasound, etc.

[0035] Furthermore, the step (S11) of identifying the portion 56 of the tower body 48 to be damaged may include a step of providing a flaw that serves as a starting point in the portion 56 to be damaged. The flaw provided in the portion to be damaged may be a groove provided in the reinforcing bars 46 that constitute the tower body 48, or may be a slit or hole provided in the reinforcing bars 46 that constitute the tower body 48. The groove provided in the reinforcing bars 46 is, for example, a groove with a V-shaped cross section, but is not limited to this and may be, for example, a U-shaped groove.

[0036] The step (S12) of covering the portion 56 of the tower body 48 to be damaged with a polymer material 58 is a step for suppressing scattering of chips and debris generated when the tower body 48 is cut or bent in two, and of debris generated when the falling side of the cut tower body 48 hits the ground or water surface. The polymer material 58 traps the chips and debris in the tower body 48 or prevents the chips and debris from scattering outside the tower body 48. The polymer material that traps the chips and debris in the tower body 48 adheres the chips and debris to the tower body 48, and a polymer material having adhesive properties to which the chips and debris adhere, or a polymer material having semi-fluidity that can wrap around the chips and debris, is selected. The polymer material that prevents chips and fragments from scattering outside the tower body 48 is a polymer material that prevents chips and fragments of the reinforcing bars 46 that make up the tower body 48 from scattering outside the tower body 48, and a polymer material that has extensibility and flexibility (shock absorption properties) is selected.

[0037] The polymer material 58 may be, but is not limited to, a thermosetting resin, a thermoplastic resin, rubber, an elastomer, wax, grease, polypropylene, nylon, ethylene propylene rubber, urethane, or polyurea, and may be appropriately selected depending on the purpose. For example, a sticky polymer material to which chips and debris adhere may be a thermoplastic resin, wax, grease, or other oily substance, and a semi-fluid polymer material that encases chips and debris may be a wax, grease, or other oily substance. For example, a polymer material that prevents chips and debris from scattering outside the tower body 48 from the rebar 46 that constitutes the tower body 48 may be a rubber, elastomer, or sheet-like polymer material, and a polymer material that is stretchable and flexible (shock-absorbing) may be polyurea, etc.

[0038] The step (S12) of covering the portion 56 of the tower body 48 to be damaged with the polymeric material 58 includes, but is not limited to, applying or spraying the polymeric material 58 onto the tower body 48, or attaching or wrapping a sheet of the polymeric material around the tower body 48.

[0039] Therefore, when the polymer material 58 is a sheet-like polymer material, the step (S12) of covering the portion 56 of the tower body 48 to be damaged with the polymer material 58 may include the step of covering the portion 56 to be damaged with the sheet-like polymer material.

[0040] The step (S13) of damaging the to-be-damaged portion 56 of the tower body 48 covered with the polymer material 58 is a step of cutting or bending the tower body 48 in two at the to-be-damaged portion 56 covered with the polymer material 58. In the step of damaging the to-be-damaged portion 56 covered with the polymer material 58, the tower body 48 may be completely cut in two, or the portion covered with the polymer material 58 may be cut and bent.

[0041] The step (S13) of damaging the portion 56 to be damaged of the tower body 48 covered with the polymer material 58 may include a step of sandwiching the portion 56 to be damaged and separating one side from the other side. The step of sandwiching the portion 56 to be damaged and separating one side from the other side may involve separating the upper side in the direction of gravity from the lower side and lifting up the upper side in the direction of gravity.

[0042] According to the method for dismantling a meteorological observation tower 40, a step (S12) is included in which the portion 56 of the tower body 48 to be damaged is covered with a polymer material 58, so that the portion 56 of the tower body 48 to be damaged is covered with the polymer material 58, and the scattering of dust particles such as cutting chips generated at the portion 56 can be suppressed.

[0043] If the step (S11) of identifying the portion 56 of the tower body 48 to be damaged includes a step of creating a defect that will serve as a starting point in the portion 56 to be damaged, a defect that will serve as a starting point is created in the portion of the tower body 48 to be damaged, and the tower body 48 can be damaged using this defect as a starting point.

[0044] When the polymer material 14 is a sheet-like polymer material, and the step (S12) of covering the portion 56 of the tower body 48 to be damaged with the polymer material 58 includes the step of covering the portion 56 to be damaged with the sheet-like polymer material, the portion 56 to be damaged is covered with the sheet-like polymer material, thereby suppressing the scattering of dust such as cutting chips generated at the portion 56.

[0045] If the step (S13) of damaging the area 56 to be damaged covered with the polymer material 58 includes a step of sandwiching the area 56 to be damaged and separating one side from the other side, the area 56 to be damaged is sandwiched and separated from the other side, and the tower body 48 is dismantled.

[0046] [Method of Dismantling Wind Turbine] Fig. 10 is a diagram that shows a schematic representation of a wind turbine 70. Fig. 11 is a diagram that shows a schematic representation of a method of dismantling the wind turbine 70 shown in Fig. 10. As shown in Fig. 10, the wind turbine 70 comprises a support / structural section 72, a generator section 74, and a rotor section 76. The support / structural section 72 is made up of a foundation 78, a tower 80, a yaw control device (not shown), etc. The generator section 74 is made up of a drive shaft 82, a gearbox 84, a generator 86, control equipment (not shown), etc., and is housed in a housing 88 called a nacelle. The rotor section 76 is made up of wind turbine blades 90, a rotor head 92, etc.

[0047] The method for dismantling the wind turbine 70 shown in Fig. 11 is a method for dismantling the wind turbine blades 90, and the yaw control device and control equipment are removed before dismantling the wind turbine blades 90. As shown in Fig. 11, the method for dismantling the wind turbine 70 involves sequentially dismantling multiple (three) wind turbine blades 90, and the wind turbine blades 90 to be dismantled are fixed by rotating them so as to follow the direction of gravity.

[0048] The method for dismantling the wind turbine 70 includes a step (S21) of identifying a portion 94 of the wind turbine blade 90 to be damaged, a step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with a polymer material 96, and a step (S23) of damaging the portion 94 of the wind turbine blade 90 to be damaged that is covered with the polymer material 96.

[0049] The step (S21) of identifying the portion 94 of the wind turbine blade 90 to be damaged is a step for identifying a portion 98 of the wind turbine blade 90 to be cut or bent in two, or a portion 102 that will break when the wind turbine blade 90 is cut or bent, and may include identifying a portion that will be damaged when the falling side of the wind turbine blade 90, when cut in two, hits the ground or the surface of water. As shown in Fig. 12 , the portion 98 of the wind turbine blade 90 to be cut or bent in two, among the portions that will be damaged in the wind turbine blade 90, can be identified arbitrarily, and the portion 102 that will break when the wind turbine blade 90 is cut or bent in two is identified taking into consideration the breaking strength and the work procedure. For example, the portion 102 that will break when the wind turbine blade 90 is cut or bent in two is a portion that will break when it falls to the ground, such as the tip of the wind turbine blade 90.

[0050] The portion 94 of the wind turbine blade 90 to be damaged is a portion that forms a boundary when the wind turbine blade 90 is cut or bent in two, or a portion that breaks when the wind turbine blade 90 is cut or bent in two, and may include a portion that is expected to be damaged when the falling side of the cut wind turbine blade 90 hits the ground or the surface of water. The portion of the wind turbine blade 90 to be damaged is, for example, a portion that originally has low breaking strength, a connection portion when the wind turbine blade is assembled, or a portion that has been flawed in advance to reduce breaking strength.

[0051] A portion that is originally low in breaking strength is, for example, a portion that is thinner than other portions (thin-walled portion), and can be identified by checking the structure from a drawing, but is not limited to this and may be detected, for example, by ultrasound, etc. Therefore, the step (S21) of identifying the portion of the wind turbine blade 90 to be damaged may include a step of identifying the portion by ultrasound, etc.

[0052] Furthermore, the step (S21) of specifying the portion 94 of the wind turbine blade 90 to be damaged may include a step of providing a flaw 104 as a base point in the portion 94 to be damaged, as shown in Fig. 13 and Fig. 14 . The flaw 104 to be provided in the portion to be damaged may be a groove 106 that appears in the outer surface of the wind turbine blade 90, as shown in Fig. 13 , or a hole 108 that penetrates from the outside to the hollow portion in the wind turbine blade 90, as shown in Fig. 14 . The groove 106 that appears in the outer surface of the wind turbine blade 90 is, for example, a groove with a V-shaped cross section, but is not limited to this and may be, for example, a groove with a U-shaped cross section. The hole 108 that penetrates from the outside to the hollow portion in the wind turbine blade 90 is, for example, a rectangular slit, but is not limited to this and may be, for example, a circular hole.

[0053] The step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with a polymer material 96 is a step for suppressing scattering of chips and debris generated when the wind turbine blade 90 is cut or bent in two, and of debris generated when the falling side of the cut wind turbine blade 90 hits the ground or the water surface. The polymer material 96 traps the chips and debris in the wind turbine blade 90, or prevents the chips and debris from scattering outside the wind turbine blade 90. The polymer material 96 that traps the chips and debris in the wind turbine blade 90 attaches the chips and debris to the wind turbine blade 90, and a polymer material having adhesiveness to which the chips and debris adhere, or a polymer material having semi-fluidity that wraps around the chips and debris, is selected. The polymer material that prevents chips and debris from scattering outside the wind turbine blade 90 is a polymer material that covers the outside of the wind turbine blade 90 and prevents debris from scattering outside the wind turbine blade 90 even if the inside of the wind turbine blade 90 is broken into pieces, and a polymer material that has extensibility and flexibility (shock absorption properties) is selected.

[0054] The polymer material 96 may be, but is not limited to, a thermosetting resin, a thermoplastic resin, rubber, an elastomer, wax, grease, polypropylene, nylon, ethylene propylene rubber, urethane, or polyurea, and may be appropriately selected depending on the purpose. For example, a sticky polymer material to which chips and debris adhere may be a thermoplastic resin, wax, grease, or other oily substance, and a semi-fluid polymer material that encases chips and debris may be a wax, grease, or other oily substance. For example, a polymer material that covers the outside of the wind turbine blade 90 and prevents fragments from scattering even if the inside of the wind turbine blade 90 is shattered may be rubber, elastomer, or a sheet-like polymer material, and a polymer material that is extensible and flexible (shock-absorbing) may be polyurea, etc.

[0055] Methods for covering the portion 94 of the wind turbine blade 90 to be damaged with the polymer material 96 include, but are not limited to, painting or spraying the polymer material 96 onto the wind turbine blade 90, or attaching or wrapping a sheet of the polymer material 96 around the wind turbine blade 90.

[0056] Therefore, when the polymer material 96 is a sheet-like polymer material, as shown in FIG. 15 , the step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with the polymer material 96 may include a step of covering the portion 94 to be damaged with the sheet-like polymer material.

[0057] When the wind turbine blade 90 is hollow, the step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with the polymer material 96 may include a step of covering at least one of the outer surface or inner surface of the portion 96 to be damaged with the polymer material 96, as shown in Fig. 16. Since at least one is covered, only the outer surface of the portion 96 to be damaged may be covered, or only the inner surface of the portion 96 to be damaged may be covered. Alternatively, both the outer surface and the inner surface of the portion 96 to be damaged may be covered.

[0058] Furthermore, when the wind turbine blade 90 is hollow, the step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with the polymer material 96 may include a step of pouring the polymer material 96 from the outside to the inside of the portion 94 to be damaged, as shown in Fig. 17. For example, the hole 110 through which the polymer material 96 is poured from the outside to the inside of the portion 94 to be damaged may be a pre-existing hole, or may be a hole that is opened specifically for pouring the polymer material 96. Furthermore, the polymer material 96 poured from the outside to the inside of the portion 94 of the wind turbine blade 90 to be damaged is, for example, an oily substance such as wax, grease, or the like.

[0059] The step (S23) of damaging the portion 94 to be damaged of the wind turbine blade 90 covered with the polymer material 96 is a step of cutting or bending the wind turbine blade 90 in two at the portion 94 to be damaged of the wind turbine blade 90 covered with the polymer material 96. In the step (S23) of damaging the portion 94 to be damaged of the wind turbine blade 90 covered with the polymer material 96, the wind turbine blade 90 may be completely cut in two, or the portion covered with the polymer material 96 may be cut and bent.

[0060] The step (S23) of damaging the portion 94 to be damaged of the wind turbine blade 90 covered with the polymer material 96 may include a step of sandwiching the portion 94 to be damaged and separating the tip side 112 of the wind turbine blade 90 from the base side 114. The step of sandwiching the portion 94 to be damaged and separating the tip side 112 of the wind turbine blade 90 from the base side 114 may, for example, involve cutting the tip side 112 of the wind turbine blade 90 from the base side 114 and dropping the tip side.

[0061] The method for dismantling a wind turbine 70 shown in FIG. 11 includes a step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with a polymer material 96. Therefore, the portion 94 of the wind turbine blade 90 to be damaged is covered with the polymer material 96, and the scattering of dust generated at the portion 94 can be suppressed.

[0062] If the step (S21) of identifying the portion 94 of the wind turbine blade 90 to be damaged includes a step of creating a defect that will serve as a starting point in the portion 94 to be damaged, a defect that will serve as a starting point is created in the portion of the wind turbine blade 90 to be damaged, and the wind turbine blade 90 can be damaged using this defect as a starting point.

[0063] When the polymer material 96 is a sheet-like polymer material, and the step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with the polymer material 96 includes the step of covering the portion 94 to be damaged with the sheet-like polymer material, the portion 96 to be damaged is covered with the sheet-like polymer material, thereby making it possible to suppress the scattering of dust generated at the portion 94.

[0064] When the wind turbine blade 90 is hollow and the step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with a polymer material 96 includes a step of covering at least one of the outer surface or inner surface of the portion 94 to be damaged with the polymer material 96, at least one of the outer surface or inner surface of the portion 94 to be damaged is covered with the polymer material 96, thereby making it possible to suppress the scattering of dust generated in the portion 94.

[0065] When the wind turbine blade 90 is hollow and the step (S22) of covering the portion 94 of the wind turbine blade 90 to be damaged with the polymer material 96 includes a step of pouring the polymer material 96 from the outside to the inside of the portion 94 to be damaged, the polymer material 96 is poured from the outside to the inside of the portion 94 to be damaged, and the inside of the portion 94 to be damaged is covered with the polymer material 96, so that the scattering of dust generated in the portion 94 can be suppressed.

[0066] When the step (S23) of damaging the portion 94 to be damaged of the wind turbine blade 90 covered with the polymer material 96 includes a step of separating the tip side 112 of the wind turbine blade 90 from the base side 114 across the portion 94 to be damaged, the tip side 112 of the wind turbine blade 90 is separated from the base side 114 across the portion 94 to be damaged, and the wind turbine blade 90 is dismantled.

[0067] As described above, the method for dismantling the wind turbine 70 shown in FIG. 11 is a method for dismantling the wind turbine blades 90, but the method for dismantling the tower 80 is also carried out in the same manner as the method for dismantling the wind turbine blades 90, so the explanation of the method for dismantling the tower 80 will be omitted.

[0068] The contents described in the above embodiment can be understood, for example, as follows.

[0069] [1] A method for dismantling a structure (10) according to one embodiment is a method for dismantling a structure (10), comprising a step (S1) of identifying a portion (12) of the structure (10) to be damaged, a step (S2) of covering the portion (12) to be damaged with a polymer material (14), and a step (S3) of damaging the portion (12) to be damaged that is covered with the polymer material (14).

[0070] According to the method for dismantling a structure (10) disclosed herein, there is a step (S3) of covering the portion (12) of the structure (10) to be damaged with a polymer material (14), so that the portion (12) of the structure (10) to be damaged is covered with the polymer material (14), and scattering of dust generated in the portion (12) can be suppressed.

[0071] [2] In another aspect of the method for dismantling a structure (10), in the method [1] above, the step (S1) of identifying the area (12) to be damaged includes a step of creating a flaw (20) that serves as a starting point in the area (12) to be damaged.

[0072] According to this method, a flaw (20) is provided as a starting point in the portion (12) to be damaged, and the structure (10) can be damaged from this flaw (20) as a starting point.

[0073] [3] In yet another aspect, the method for dismantling a structure (10) is the method [1] or [2] above, wherein the polymer material (14) is a sheet-like polymer material, and the step (S2) of covering with the polymer material (14) includes a step of covering the area (12) to be damaged with the sheet-like polymer material.

[0074] According to this method, the area to be damaged (12) is covered with a sheet-like polymer material, so that scattering of dust generated at the area can be suppressed.

[0075] [4] In yet another aspect, the method for dismantling a structure is any one of the methods [1] to [3] above, wherein the structure (10) is hollow, and the step (S2) of covering with a polymer material includes a step of covering at least one of the outer surface or the inner surface of the portion (12) to be damaged with a polymer material (14).

[0076] According to this method, at least one of the outer surface and the inner surface of the area (12) to be damaged is covered with the polymer material (14), so that scattering of dust generated at the area (12) can be suppressed.

[0077] [5] In yet another aspect, a method for dismantling a structure (10) is any one of the methods [1] to [3] above, wherein the structure (10) is hollow, and the step (S2) of covering with the polymer material (14) includes a step of pouring the polymer material (14) from the outside to the inside of the area (12) to be damaged.

[0078] According to this method, the polymer material (14) is poured from the outside to the inside of the area (12) to be damaged, and the inside of the area (12) to be damaged is covered with the polymer material (14), thereby making it possible to suppress the scattering of dust generated in the area (12).

[0079] [6] In yet another aspect of the method for dismantling a structure (10), in any one of the methods [1] to [5] above, the damaging step (S3) includes a step of sandwiching the portion (12) to be damaged and separating one side (the lower side 28 in the direction of gravity) from the other side (the upper side 30 in the direction of gravity).

[0080] According to this method, one side (the lower side 28 in the direction of gravity) of the damaged portion (12) is separated from the other side (the upper side 30 in the direction of gravity), and the structure (10) is dismantled.

[0081] [7] In yet another aspect, a method for dismantling a structure (10) is any one of the methods [1] to [6] above, wherein the portion to be damaged is a portion having a smaller thickness than other portions, and the step (S1) of identifying the portion to be damaged includes a step of detecting the portion.

[0082] According to this method, the area to be damaged can be a portion that is thinner than other portions.

[0083] 10 Structure 12 Part of the structure to be damaged 14 Polymer material 16 Part where the structure is cut or bent in two 20 Defect 22 Groove 24 Hole 26 Hole where the polymer material is poured 28 Lower side of the structure in the direction of gravity 30 Upper side of the structure in the direction of gravity 40 Meteorological observation tower 42 Foundation 44 Tower 46 Reinforcement bar 48 Tower body 50 Protrusion 52, 54 Measuring equipment 56 Part where the structure is to be damaged 58 Polymer material 60 Part where the tower body is to be cut or bent in two 70 Wind turbine 72 Support / structural part 74 Generator part 76 Rotor part 78 Foundation 80 Tower 82 Drive shaft 84 Reducer 86 Generator 88 Housing 90 Wind turbine blade 92 Rotor head 94 Part where the structure is to be damaged 96 Polymer material 98 Portion where wind turbine blade is cut or bent in two 102 Portion that breaks when wind turbine blade is cut or bent 104 Defect 106 Groove 108 Hole 110 Hole into which polymer material is poured 112 Tip side of wind turbine blade 114 Base side of wind turbine blade

Claims

1. A method for dismantling a structure, comprising the steps of: Identifying a portion of the structure to be damaged; covering the damaged area with a polymeric material; damaging the damaged area covered with the polymeric material; having The step of identifying the portion to be damaged includes a step of identifying a portion that is expected to be damaged when the portion to be damaged is impacted on the ground or water surface after one side is separated from the other side by sandwiching the portion to be damaged; the damaging step includes separating the one side from the other side; How to demolish a structure.

2. 2. The method for dismantling a structure according to claim 1, wherein the step of identifying the portion to be damaged includes the step of providing a flaw that serves as a starting point in the portion to be damaged.

3. The polymer material is a sheet-shaped polymer material, 3. The method for dismantling a structure according to claim 1, wherein the step of covering with the polymer material includes a step of covering the area to be damaged with the sheet-like polymer material.

4. The structure is hollow, 3. The method for dismantling a structure according to claim 1, wherein the step of covering with a polymer material includes a step of covering at least one of an outer surface or an inner surface of the portion to be damaged with a polymer material.

5. The structure is hollow, 3. The method for dismantling a structure according to claim 1, wherein the step of covering with the polymeric material includes a step of pouring the polymeric material from the outside to the inside of the portion to be damaged.

6. The damaged portion is a portion having a smaller thickness than other portions, The method for dismantling a structure according to claim 1 or 2, wherein the step of identifying the portion to be damaged includes a step of detecting the portion.