Methods for demolishing structures

Abstract

Provided is a method for dismantling a structure including a resin portion in at least part thereof, said method comprising a step for heating at least one part of the resin portion to soften said one part, and a step for separating one side of the structure from the other side, the softened one part being therebetween.

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses a demolition method for an existing iron tower. Such a demolition method includes a step of cutting the upper tower body at a cutting position to separate the unit tower body from the lower part of the upper tower body, and a step of carrying out the unit tower body to the outside and removing the unit tower body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the demolition method for an existing iron tower disclosed in Patent Document 1, there is a risk that dust such as chips and fragments generated when cutting the upper tower body scatters.

[0005] In view of the above circumstances, at least one embodiment of the present invention aims to provide a method for disassembling a structure capable of suppressing the scattering of dust when disassembling the structure.

Means for Solving the Problems

[0006] A method for disassembling a structure according to at least one embodiment of the present invention is a method for disassembling a structure including a resin part in at least a part thereof, a step of heating at least a part of the resin part to soften the part, a step of separating one side of the structure from the other side by sandwiching the softened part, and has.

Effects of the Invention

[0007] According to at least one embodiment of the present invention, dust scattering can be suppressed when demolishing a structure. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing the structure according to Embodiment 1. [Figure 2] This diagram schematically shows the method for dismantling the structure shown in Figure 1. [Figure 3] This is a schematic diagram showing the structure according to Embodiment 2. [Figure 4] This diagram schematically shows the method for dismantling the structure shown in Figure 3. [Figure 5] This diagram schematically shows the step of heating the resin portion in which the fastener is embedded. [Figure 6] This diagram schematically shows the step of lowering the first member by gravity. [Figure 7] This diagram schematically shows the step of passing an electric current through a heating wire wrapped around at least a portion of the resin part. [Figure 8] This diagram schematically illustrates the steps of exposing a portion of the fastener from the resin part and passing an electric current through the portion of the fastener. [Figure 9] This diagram schematically illustrates the steps of placing a coil close to a fastener and applying a high-frequency current to the coil. [Figure 10] This diagram schematically shows a state in which coils are installed on one and the other sides in the extending direction of the fastener. [Figure 11] This is a schematic diagram of a weather observation tower. [Figure 12] Figure 11 is a schematic diagram illustrating the method for dismantling the weather observation tower shown. [Figure 13] This is a diagram of a windmill. [Figure 14] Figure 5 is a schematic diagram illustrating the method for dismantling the wind turbine shown. [Modes for carrying out the invention]

[0009] Hereinafter, several embodiments of the present invention will be described with reference to the attached drawings. However, the dimensions, materials, shapes, relative arrangements, etc., of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. For example, expressions describing relative or absolute arrangements such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" should not only strictly describe such arrangements, but also describe states of relative displacement with tolerances or angles or distances that allow for the same function to be achieved. Furthermore, expressions describing shapes such as squares and cylinders shall not only represent geometrically precise shapes such as squares and cylinders, but also shapes that include protrusions, chamfers, etc., to the extent that the same effect can be achieved. On the other hand, expressions such as "to possess," "to be equipped with," "to have," "to include," or "to have" a single component are not exclusive expressions that exclude the existence of other components.

[0010] [Method for dismantling a structure according to Embodiment 1] Figure 1 is a schematic diagram showing a structure 10 according to Embodiment 1. Figure 2 is a schematic diagram showing a method for dismantling the structure shown in Figure 1. The structure 10 to which the method for disassembling a structure according to Embodiment 1 is applied is a structure including a resin portion 12 at least partially. As long as the boundary portion to be separated into at least two parts is made of a resin material, the material of the remaining portion is not limited, nor are the shape and structure. Also, although the resin is a non-conductor, it may be one in which the resin portion contains a conductor, such as carbon fiber reinforced plastic (CFRP). The method for disassembling a structure according to Embodiment 1 is applicable to structures such as, for example, a meteorological observation tower, a windmill, an aircraft, a ship, a tank, or an automobile. Here, a method for disassembling a hollow structure 10 extending in the gravitational direction, in which the boundary portion to be separated into at least two parts is made of a resin material, will be described as an example, but it is not limited thereto. The resin material constituting the boundary portion to be separated into at least two parts is, for example, an epoxy resin, a phenol resin, a polyester resin, etc., and is composed of, for example, a fiber reinforced plastic (FRP) such as glass fiber reinforced plastic (GFRP), carbon fiber reinforced plastic, or Kevlar fiber reinforced plastic (KFRP).

[0011] As shown in FIG. 2, the method for disassembling the structure 10 includes a step (S1) of heating at least a part 14 of the resin portion 12 to soften the part 14, and a step (S2) of separating a part 16 on one side of the structure 10 from a part 18 on the other side by sandwiching the softened part 14.

[0012] In the step (S1) of heating at least a part 14 of the resin portion 12 to soften the part 14, it is not necessary to heat the entire resin portion 12 to heat at least a part 14 of the resin portion 12. Heating of at least a part 14 of the resin portion 12 is performed, for example, by passing an electric current through a heating wire 20 wound around the part 14 (resin portion 12). When the resin portion 12 is a 180°C curing type epoxy resin, it softens when it reaches 200°C or more and decomposes at around 500°C.

[0013] Step (S2) of separating one side portion 16 of the structure 10 from the other side portion 18, with the softened portion 14 in between, separates one side portion 16 of the structure from the other side portion 18 with the softened portion 14 as the boundary. For example, if the structure 10 extends along the direction of gravity, the softened portion 14 is used as the boundary to separate the portion 16 on the downward side (one side) in the direction of gravity from the portion 18 on the upward side (the other side) in the direction of gravity, but the separation may also be achieved by applying a load to the portion 16 on one side.

[0014] According to the method for dismantling the structure 10 in Embodiment 1, at least a portion 14 of the resin portion 12 of the structure 10 is heated to soften the portion 14, and the portion 16 on one side of the structure 10 is separated from the portion 18 on the other side by sandwiching the softened portion 14, thereby suppressing the scattering of dust when dismantling the structure 10.

[0015] [Method for dismantling a structure according to Embodiment 2] Figure 3 is a schematic diagram showing structure 30. Figure 4 is a schematic diagram showing the method for dismantling structure 30 shown in Figure 3. The structure 30 to which the structural demolition method according to Embodiment 2 is applied is a structure that includes at least a portion of resin parts 32, 34 and extends in the direction of gravity. The structure 30 includes a first member 40 provided on one side of a portion 36(38) of the resin parts 32, 34 to be softened, and a second member 42 provided on the other side and joined to the first member 40. The first member 40 and the second member 42 are fastened together by a metal fastener 44 embedded in the resin part 32(34) provided on at least one of the first member 40 and the second member 42. The metal fastener 44 is, for example, a bolt and a nut, with one embedded in the first member 40 and the other embedded in the second member 42.

[0016] As shown in Figure 4, the method for dismantling the structure 30 includes the steps of: heating at least a portion 36(38) of the resin parts 32,34 to soften the portion 36(38) (S11); and separating the first member 40, which is provided on one side of the structure 30, from the second member 42, which is provided on the other side, with the softened portion 36(38) in between (S12). The step of heating at least a portion 36(38) of the resin parts 32,34 to soften the portion 36(38) (S11) includes the step of heating the resin part 32(34) in which the fastener 44 is embedded (S13), as shown in Figure 5. Furthermore, the resin portion 32(34) to be heated is a part 36(38) of either the first member 40 or the second member 42 in which the fastener 44 is embedded, and it is not necessary to heat both the first member 40 and the second member 42. In the example shown in Figure 5, the second member 42, which is located on the upper side in the direction of gravity, is heated, but the first member 40, which is located on the lower side, may also be heated.

[0017] In step (S12), which separates the first member 40, provided on one side of the structure 30 with the softened portion 36(38) in between, from the second member 42, provided on the other side, the fastener 44 comes out of the resin portion 32(34) of either the first member 40 or the second member 42 in which the fastener 44 is embedded, and the other of either the first member 40 or the second member 42 is separated.

[0018] The step (S12) of separating the first member 40, which is provided on one side of the structure 30 with the softened portion 36(38) in between, from the second member 42, which is provided on the other side, may include a step (S14) of lowering the first member 40 by gravity G, as shown in Figure 6. If it is a problem for the first member 40 to fall by gravity G, the first member 40 may be held in advance with a hook and wire, etc., and the first member 40 may be slowly lowered onto the ground or sea. Alternatively, the first member 40 may be slowly lowered onto the ground or sea using a wire or rope, etc., which is installed at an angle to the first member 40. In the example shown in Figure 6, the fastener 44 comes off the second member 42 by heating the second member 42, leaving the fastener 44 on the first member 40 provided on the lower side. However, the fastener 44 may come off the first member 40 by heating the first member 40, leaving the fastener 44 on the second member 42.

[0019] The step (S11) of heating at least a portion 36(38) of the resin portion 32(34) to soften the portion 36(38) may also include the step (S15) of passing an electric current through a heating wire 46 wrapped around at least a portion 36(38) of the resin portion 32,34, as shown in Figure 7.

[0020] The step (S11) of heating at least a portion 36(38) of the resin portion 32(34) to soften the portion 36(38) may include, as shown in Figure 8, the step (S16) of exposing a portion of the fastener 44 from the resin portion 32,34 and the step (S17) of passing an electric current through a portion of the fastener 44.

[0021] The step (S11) of heating at least a portion 36(38) of the resin portion 32(34) to soften the portion 36(38) may include, as shown in Figure 9, the step (S18) of placing the coil 48(50) close to the fastener 44 and the step (S19) of passing a high-frequency current through the coil 48(50).

[0022] In step (S18) of placing the coil 48(50) close to the fastener 44, for example, the coil 48(50) may be placed on either the inner or outer circumference of the fastener 44. Furthermore, as long as the fastener 44 can be heated by electromagnetic induction from the coil 48(50), it may be placed on either the inner or outer circumference of the fastener 44, or on both the inner and outer circumferences of the fastener 44.

[0023] In step (S18), where coils 50 and 52 are installed close to the fastener 44, coils 52 and 54 may be installed on one side and the other side in the extending direction of the fastener 44, as shown in Figure 10.

[0024] According to the method for dismantling the structure 30 in Embodiment 2, a portion 36(38) of the resin portion 32(34) in which the fastener 44 is embedded is heated, thereby softening the portion 36(38) of the resin portion 32(34) and separating the first member 40 from the second member 42. This makes it possible to suppress the scattering of dust when separating the first member 40 from the second member 42.

[0025] If a structure 30, which includes at least a portion of a resin part 32 (34), is a structure that extends along the direction of gravity, and the step (S12) of separating one side of the structure 30 from the other side includes the step (S14) of lowering one side by gravity G, then one side can be separated from the other side without using heavy machinery or the like.

[0026] If the step (S11) of heating at least a portion 36(38) of the resin portion 32(34) to soften the portion 36(38) includes the step (S15) of passing an electric current through a heating wire 46 wrapped around at least a portion 36(38) of the resin portion 32,34, then the portion 36(38) can be heated and softened.

[0027] If the step of heating at least a portion 36(38) of the resin portion 32(34) to soften the portion 36(38) (S11) includes the steps of exposing a portion of the fastener 44 from a portion 36,38 of the resin portion 32,34 (S16) and passing an electric current through a portion of the fastener 44 (S17), then the fastener 44 is heated and the resin around the fastener 44 is softened.

[0028] If the step of heating at least a portion 36(38) of the resin portion 32(34) to soften the portion 36(38) (S11) includes the steps of placing the coil 48(50) close to the fastener 44 (S18) and passing a high-frequency current through the coil 48(50) (S19), then the fastener 44 can be heated by electromagnetic induction, and the resin around the fastener 44 can be softened.

[0029] In step (S18), where the coil 48(50) is placed close to the fastener 44, if the coil 48(50) is placed on either the inner or outer circumference of the fastener 44, the fastener 44 can be heated by electromagnetic induction, and the resin around the fastener 44 can be softened.

[0030] In step (S18), where coils 50 and 52 are placed close to the fastener 44, if coils 52 and 54 are placed on one side and the other side in the extending direction of the fastener 44, the fastener 44 is heated by electromagnetic induction, and the resin around the fastener 44 can be softened.

[0031] [Method for dismantling weather observation towers] Figure 11 is a schematic diagram showing the weather observation tower 60. Figure 12 is a schematic diagram showing the method for dismantling the weather observation tower 60 shown in Figure 11. As shown in Figure 10, the weather observation tower 60 comprises a base 62 and a tower 64 built on the base 62. The tower 64 is a structure that includes at least a part of a resin component, and measuring instruments 70, 72 for measuring meteorological parameters (e.g., wind direction, wind speed, temperature, atmospheric pressure, or precipitation) are installed on each of the branch-like projections 68 that branch out from the tower body 66.

[0032] As shown in Figure 12, the tower body 66 includes a first member 82 provided on the upper side, sandwiching a portion 78,80 of the resin parts 74,76, and a second member 84 provided on the ground side and joined to the first member 82. The first member 82 and the second member 84 are fastened together by a metal fastener 86 embedded in the resin part 78(80) provided in at least one of the first member 82 and the second member 84. The metal fastener 86 is, for example, a bolt and a nut, with one embedded in the first member 82 and the other embedded in the second member 84.

[0033] The dismantling method for the weather observation tower 60 shown in Figure 12 is a method for dismantling the tower body 66, wherein the measuring instruments 70, 72 installed on each of the branch-shaped projections 68, and the branch-shaped projections 68 are removed before the dismantling of the tower body 66. The dismantling method for the weather observation tower 60 includes the step (S31) of heating at least a portion 78(80) of the resin portion 74(76) of the tower body 66 to soften the portion 78(80), and the step (S32) of separating the first member 82, which is on one side of the tower body 66, from the second member 84, which is on the other side, with the softened portion 78(80) in between. The step (S31) of heating at least a portion 78(80) of the resin portion 74(76) to soften the portion 78(80) includes the step (S33) of heating the resin portion 78(80) in which the fastener 86 is embedded. Furthermore, the resin portion 78(80) to be heated is a part of the resin portion 78(80) of either the first member 82 or the second member 84 in which the fastener 86 is embedded, and it is not necessary to heat both the first member 82 and the second member 84. In the example shown in Figure 12, the first member 82, which is located on the upper side in the direction of gravity, is heated, but the second member 84, which is located on the lower side, may also be heated.

[0034] In step (S32), which separates the first member 82, located on one side of the tower body 66, from the second member 84, located on the other side, with the softened portion 78(80) in between, the first member 82 may be lifted from the second member 84 by a crane, but is not limited to this. In step (S32), which separates the first member 82 from the second member 84, the fastener 86 may be pulled out from the resin portion 78(80) of either the first member 82 or the second member 84 in which the fastener 86 is embedded, thereby separating the other of the first member 82 or the second member 84. In the example shown in Figure 12, heating the first member 82 located on the upper side in the direction of gravity causes the fastener 86 to detach from the first member 82 and remain in the second member 84 located on the lower side. Alternatively, heating the second member 84 may cause the fastener 86 to detach from the second member 84 and remain in the first member 82.

[0035] The step (S31) of heating at least a portion 78(80) of the resin portion 74(76) to soften the portion 78(80) may include the step of passing an electric current through a heating wire wrapped around at least a portion 78(80) of the resin portion 74(76), similar to the method for dismantling the structure 30 according to Embodiment 2 described above.

[0036] The step (S31) of heating at least a portion 78(80) of the resin portion 74(76) to soften the portion 78(80) may include, in the same way as the method for dismantling the structure 30 according to Embodiment 2 described above, the steps of exposing a portion of the fastener 86 from the resin portion 78,80 and passing an electric current through a portion of the fastener 86.

[0037] The step (S31) of heating at least a portion 78(80) of the resin portion 74(76) to soften the portion 78(80) may include the steps of bringing the coil close to the fastener 86 and passing a high-frequency current through the coil, similar to the method for dismantling the structure 30 according to Embodiment 2 described above.

[0038] In the step of bringing the coil close to the fastener 86 and installing it, the coil may be installed on either the inner or outer circumference of the fastener 86, similar to the method for dismantling the structure 30 according to Embodiment 2 described above. Furthermore, as long as the coil can heat the fastener 86 through electromagnetic induction, it may be installed on either the inner or outer circumference of the fastener 86, or on both the inner and outer circumferences.

[0039] In the step of installing the coil close to the fastener 86, the coil may be installed on one side and the other side in the extending direction of the fastener 86, similar to the method for dismantling the structure 30 according to Embodiment 2 described above.

[0040] According to the dismantling method for the weather observation tower 60 shown in Figure 11, a portion 78(80) of the resin part 74(76) in which the fastener 86 is embedded is heated, thereby softening the portion 78(80) of the resin part 74(76) and separating the first member 82 from the second member 84. This makes it possible to suppress the scattering of dust when separating the first member 82 from the second member 84.

[0041] If the step (S31) of heating at least a portion 78(80) of the resin portion 74(76) to soften the portion 78(80) includes the step of passing an electric current through a heating wire wrapped around at least a portion 78(80) of the resin portion 74(76), then the resin portion 78(80) can be heated and softened.

[0042] If the step (S31) of heating at least a portion 78(80) of the resin portion 74(76) to soften the portion 78(80) includes the steps of exposing a portion of the fastener 86 from a portion of the resin portion 74,76 and passing an electric current through a portion of the fastener 86, then the fastener 86 is heated and the resin portions 78,80 around the fastener 86 can be softened.

[0043] If the step (S31) of heating at least a portion 78(80) of the resin portion 74(76) to soften the portion 78(80) includes the steps of placing a coil close to the fastener 86 and passing a high-frequency current through the coil, then the fastener 86 can be heated by electromagnetic induction, and the resin portions 74,76 around the fastener 86 can be softened.

[0044] If, in the step of placing the coil close to the fastener 86, the coil is placed on either the inner or outer circumference of the fastener 86, the fastener 86 will be heated by electromagnetic induction, and the resin parts 74 and 76 around the fastener 86 will be softened.

[0045] If, in the step of installing the coil close to the fastener 86, the coils are installed on one side and the other side in the extending direction of the fastener 86, the fastener 86 is heated by electromagnetic induction, and the resin around the fastener 86 can be softened.

[0046] [How to dismantle a wind turbine] Figure 13 is a schematic diagram of the wind turbine 100. Figure 14 is a schematic diagram of the dismantling method for the wind turbine 100 shown in Figure 13. As shown in Figure 13, the wind turbine 100 comprises a support / structure section 102, a generator section 104, and a rotor section 106. The support / structure section 102 consists of a foundation 108, a tower 110, a yaw control section (not shown), etc. The generator section 104 consists of a drive shaft 112, a speed increaser 114, a generator 116, control equipment (not shown), etc., and is housed in a housing 118 called a nacelle. The rotor section 106 consists of wind turbine blades 120, a rotor head 122, etc.

[0047] As shown in Figure 13, the wind turbine blade 120 includes a first member 132 provided on the tip side, sandwiching a portion 128, 130 of the resin parts 124, 126, and a second member 134 provided on the rotor head 122 side and joined to the first member 132. The first member 132 and the second member 134 are fastened together by a metal fastener 136 embedded in the resin parts 128, 130 provided on at least one of the first member 132 and the second member 134. The metal fastener 136 is, for example, a bolt and a nut, with one embedded in the first member 132 and the other embedded in the second member 134.

[0048] The dismantling method for the wind turbine 100 shown in Figure 14 is a method for dismantling the wind turbine blades 120, and the yaw control device and control device are removed before the dismantling of the wind turbine blades 120. As shown in Figure 14, the dismantling method for the wind turbine 100 involves sequentially dismantling multiple (three) wind turbine blades 120, and the wind turbine blades 120 to be dismantled are rotated and fixed in line with the direction of gravity.

[0049] The method for dismantling the wind turbine 100 includes the steps of: heating at least a portion 130(128) of the resin portion 126(124) of the wind turbine blade 120 to soften the portion 130(128) (S51); and separating the first member 132, which is provided on the tip side of the wind turbine blade 120, from the second member 134, which is provided on the rotor head 122 side, with the softened portion 130(128) in between (S52). The step of heating at least a portion 130(128) of the resin portion 126(124) to soften the portion 130(128) (S51) includes the step of heating the resin portion 130(128) in which the fastener 136 is embedded (S53). Furthermore, the resin portion 130 (128) to be heated is a part 130 (128) of either the resin portion 126 (124) of the first member 132 or the second member 134 in which the fastener 136 is embedded, and it is not necessary to heat both the first member 132 and the second member 134. In the example shown in Figure 14, a part 130 of the resin portion 126 of the second member 134, which is located on the upper side in the direction of gravity, is heated, but it is also possible to heat a part 128 of the resin portion 124 of the first member 132, which is located on the lower side.

[0050] In step (S52), which separates the first member 132, located on the tip side of the wind turbine blade 120, from the second member 134, located on the rotor head 122 side, with the softened portion 130 (128) in between, the fastener 136 comes out of the resin portion 130 (128) of either the first member 132 or the second member 134 in which the fastener 136 is embedded, and the other of the first member 132 or the second member 134 is separated.

[0051] The step (S52) of separating the first member 132, which is provided on the tip side of the wind turbine blade 120 with the softened portion 130 (128) in between, from the second member 134 provided on the rotor head 122 side, may include a step of lowering the first member 132 by gravity G, similar to the dismantling method of the structure 30 according to Embodiment 2 described above. If it is a problem for the first member 132 to fall by gravity G, the first member 132 may be held in advance with a hook and wire, etc., and the first member 132 may be slowly lowered onto the ground or sea. Alternatively, the first member 132 may be slowly lowered onto the ground or sea using a wire or rope, etc., which is installed at an angle to it. In the example shown in Figure 14, heating a portion 130 of the resin portion 126 of the second member 134, which is located on the upper side in the direction of gravity, causes the fastener 136 to fall out of the second member 134 and remain in the first member 132 located on the lower side. Alternatively, heating a portion 128 of the resin portion 124 of the first member 132 may cause the fastener 136 to fall out of the first member 132 and remain in the second member 134.

[0052] The step (S52) of heating at least a portion 130 (128) of the resin portion 126 (124) to soften the portion 130 (128) may include the step of passing an electric current through a heating wire wrapped around at least a portion 130 (128) of the resin portion 126 (124), similar to the method for dismantling the structure 30 according to Embodiment 2 described above.

[0053] The step (S52) of heating at least a portion 130 (128) of the resin portion 126 (124) to soften the portion 130 (128) may include the steps of exposing a portion of the fastener 136 from the resin portions 128, 130 and passing an electric current through a portion of the fastener 136.

[0054] The step (S52) of heating at least a portion 130 (128) of the resin portion 126 (124) to soften the portion 130 (128) may include the steps of bringing the coil close to the fastener 136 and passing a high-frequency current through the coil, similar to the method for dismantling the structure 30 according to Embodiment 2 described above.

[0055] In the step of placing the coil close to the fastener 136, for example, the coil may be placed on either the inner or outer circumference of the fastener 136. Furthermore, as long as the fastener 136 can be heated by electromagnetic induction from the coil, it may be placed on either the inner or outer circumference of the fastener 136, or on both the inner and outer circumferences of the fastener 136.

[0056] In the step of installing the coil close to the fastener 136, the coil may be installed on one side and the other side in the extending direction of the fastener 136.

[0057] According to the dismantling method for the wind turbine 100 shown in Figure 13, a portion 130 (128) of the resin parts 124 and 126 in which the fastener 136 is embedded is heated, thereby softening the portion 130 (128) of the resin parts 124 and 126 and separating the first member 132 from the second member 134. This makes it possible to suppress the scattering of dust when separating the first member 132 from the second member 134.

[0058] In a wind turbine blade 120 that includes at least some resin parts 124, 126 and extends along the direction of gravity, if the step (S52) of separating a first member 132 provided on the tip side of the wind turbine blade 120 from a second member 134 provided on the rotor head 122 side includes a step of lowering the first member 132 by gravity G, then the first member 132 can be separated from the second member 134 without using heavy machinery or the like.

[0059] If the step (S51) of heating at least a portion 130(128) of the resin portion 124,126 to soften the portion 130(128) includes the step of passing an electric current through a heating wire wrapped around at least a portion 130(128) of the resin portion 124,126, then the resin portion 130(128) can be heated and softened.

[0060] If the step (S51) of heating at least a portion 130 (128) of the resin portion 124, 126 to soften the portion 130 (128) includes the steps of exposing a portion of the fastener 136 from a portion 128, 130 of the resin portion 124, 126 and passing an electric current through a portion of the fastener 136, then the fastener 136 is heated and the resin portion 128, 130 around the fastener 136 can be softened.

[0061] If the step (S51) of heating at least a portion 130 (128) of the resin parts 124, 126 to soften the portion 130 (128) includes the steps of placing a coil close to the fastener 136 and passing a high-frequency current through the coil, then the fastener 136 can be heated by electromagnetic induction, and the resin parts 130 (128) around the fastener 136 can be softened.

[0062] If, in the step of bringing the coil close to the fastener 136 and installing it, the coil is installed on either the inner or outer circumference of the fastener 136, the fastener 136 will be heated by electromagnetic induction, and the resin portion 130 (128) around the fastener 136 will be softened.

[0063] If, in the step of installing the coil close to the fastener 136, the coils are installed on one side and the other side in the extending direction of the fastener 136, the fastener 136 is heated by electromagnetic induction, and the resin portion 130 (128) around the fastener 136 can be softened.

[0064] The contents described in the above embodiment can be understood, for example, as follows:

[0065] [1] A method for dismantling a structure according to one embodiment is a method for dismantling a structure (10) which includes a resin portion (12) in at least part of it, comprising the steps of: (S1) heating at least a portion (14) of the resin portion (12) to soften the portion (14); and (S2) separating a portion (16) that is one side of the structure (10) from a portion (18) that is the other side, with the softened portion (14) in between.

[0066] According to the method for dismantling a structure (10) described herein, at least a portion (14) of the resin portion (12) of the structure (10) is heated to soften the portion (14), and the portion (16) on one side of the structure (10) is separated from the portion (18) on the other side by sandwiching the softened portion (14), thereby suppressing the scattering of dust when dismantling the structure (10).

[0067] [2] A method for dismantling a structure according to another embodiment is the method of [1] above, wherein the structure (30) which includes a resin portion (32(34)) in at least a part of it includes a first member (40) provided on one side and a second member (42) provided on the other side and joined to the first member (40), the first member (40) and the second member (42) are fastened together by a metal fastener (44) embedded in the resin portion (36(38)) provided on at least one of the first member (40) and the second member (42), and the step of softening the portion (S11) includes the step of heating the resin portion (36(38)) in which the fastener (44) is embedded (S13).

[0068] According to this method, the resin portion (36(38)) in which the fastener (44) is embedded is heated, which softens the resin portion (36(38)) and separates the first member (40) from the second member (42). This makes it possible to suppress the scattering of dust when separating the first part (40) from the second member (42).

[0069] [3] A method for dismantling a structure according to yet another embodiment is the method of [1] or [2] above, wherein the structure (30) which includes at least a part of a resin portion (32(34)) is a structure that extends along the direction of gravity, and the step (S12) of separating one side of the structure (30) from the other side includes the step (S14) of lowering the one side by gravity (G).

[0070] This method allows one side to be lowered by gravity (G), thus separating it from the other side without the need for heavy machinery.

[0071] [4] A method for dismantling a structure according to yet another embodiment is one of the methods [1] to [3] above, wherein the step (S11) of softening the portion (36(38)) includes the step (S15) of passing an electric current through a heating wire (46) wrapped around the resin portion (36(38)).

[0072] By this method, an electric current is passed through the heating wire (46) wrapped around the resin part (36(38)), thereby heating the resin part (36(38)) and softening it.

[0073] [5] A method for dismantling a structure according to yet another embodiment is the method in [2] above, wherein the step of heating the resin portion (36, 38) (S11) includes the step of exposing a part of the fastener (44) from the resin portion (36, 38) (S17) and the step of passing an electric current through a part of the fastener (44) (S17).

[0074] This method exposes a portion of the fastener (44) from the resin portion (36,38), and by passing an electric current through a portion of the fastener (44), the fastener (44) is heated, and the resin around the fastener (44) can be softened.

[0075] [6] A method for dismantling a structure according to yet another embodiment is the method in [2] above, wherein the step of heating the resin portion (36(38)) (S11) includes the step of bringing the coil (48(50)) close to the fastener (44) (S18) and the step of passing a high-frequency current through the coil (48(50)) (19).

[0076] According to this method, the coil (48(50)) is placed close to the fastener (44), and a high-frequency current is passed through the coil (48(50)). This causes the fastener (44) to heat up due to electromagnetic induction, and the resin around the fastener (44) can be softened.

[0077] [7] Another method for dismantling a structure, in the method described in [6] above, in step (S18) of bringing the coil (48(50)) close to the fastener (44), the coil (48(50)) is placed on the inner or outer circumference of the fastener (44).

[0078] According to this method, since a coil (48(50)) is placed on the outer or inner circumference of the fastener (44), the fastener (44) is heated by electromagnetic induction, and the resin around the fastener (44) can be softened.

[0079] [8] In yet another embodiment of the method for dismantling a structure, in the method of [6] described above, in the step (S18) of bringing the coil (50(52)) closer together, the coil (50(52)) is installed on one side and the other side in the extending direction of the fastener (44).

[0080] According to this method, since coils (50(52)) are installed on one side and the other side in the extending direction of the fastener (44), the fastener (44) is heated by electromagnetic induction, and the resin around the fastener (44) can be softened. [Explanation of Symbols]

[0081] 10 Structures 12 Resin part 14. Part of the resin section 16. One side of the structure 18. The other side of the structure 20 heating wire 30 Structures 32,34 Resin part 36,38 Part of the resin section 40 First Member 42 Second Member 44 Fastener 46 Heating wire 48, 50 coils 52, 54 coils 60 Weather Observation Tower 62 Basics 64 Tower 66 Tower body 68 Protrusion 70,72 Measuring Instruments 74,76 Resin part 78,80 Part of the resin section 82 First Member 84 Second Member 86 Fastener 100 windmills 102 Support and structure section 104 Generator Section 106 Rotor section 108 Basics 110 Tower 112 Drive shaft 114 Reducer 116 Generator 118 cabinets 120 Windmill blade 122 Rotorhead 124,126 Resin part 128,130 Part of the resin section 132 First Member 134 Second Member 136 Fastener

Claims

1. A method for dismantling a structure that includes at least a portion of a resin component, The structure, which includes at least a portion of a resin part, includes a first member provided on one side of the structure with at least a portion of the resin part in between, and a second member provided on the other side of the structure and joined to the first member. The first member and the second member are fastened together by a metal fastener embedded in the resin portion provided in at least one of the first member and the second member. The steps include: heating at least a portion of the resin portion to soften the portion; The steps include separating the softened portion from the other portion of the structure, It has, The step of softening the aforementioned portion includes the step of heating the resin portion in which the fastener is embedded. Methods for demolishing structures.

2. The aforementioned structure, which includes at least a portion of a resin component, is a structure that extends along the direction of gravity, The method for dismantling a structure according to claim 1, wherein the step of separating one side of the structure from the other side includes the step of lowering the one side by gravity.

3. The method for dismantling a structure according to claim 1 or 2, wherein the step of softening the aforementioned portion includes the step of passing an electric current through a heating wire wrapped around the resin portion.

4. The step of heating the resin portion is: The steps include exposing a part of the fastener from the resin portion, The steps include: passing current through a part of the fastener, A method for dismantling a structure according to claim 1 or 2, including the following:

5. The step of heating the resin portion is: The steps include: installing the coil close to the fastener; The steps include passing a high-frequency current through the coil, A method for dismantling a structure according to claim 1 or 2, including the following:

6. In the step of installing the coil close to the ground, A coil is installed on the inner or outer circumference of the fastener. A method for dismantling a structure according to claim 5.

7. In the step of installing the coil close to the ground, Coils are installed on one side and the other side in the extending direction of the fastener. A method for dismantling a structure according to claim 5.

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