Temporary floaters and temporary floater installation method

Abstract

This paper proposes a temporary floater and a method for installing it that can temporarily reduce the draft of floating structures, thereby suppressing the increase in the size of floating structures. [Solution] A temporary floater 4 for increasing the buoyancy of a floating foundation 3, comprising a floater body 41 attached to a beam 33 of the floating foundation 3, and a wire 42 for securing the floater body 41 to the beam 33. Multiple floater bodies 41 are provided facing each other on either side of the beam 33, and the wire 42 is connected to the floater bodies 41.

Description

Technical Field

[0001] The present invention relates to a temporary float for increasing the buoyancy of a floating structure and a method for installing the temporary float.

Background Art

[0002] For example, when installing a windmill or the like using a crane or the like from a quay wall in a port, the draft of a floating foundation of a wind power generation facility tends to increase due to the weight of the windmill or the like. Therefore, when the water depth in the port is shallower than the draft, it is necessary to increase the buoyancy of the floating foundation to suppress the increase in the draft.

[0003] Patent Document 1 discloses a semi-submersible floating structure having a center column and side columns, wherein an opening for ballast loading and unloading is provided in the side columns, and the draft of the floating structure is adjusted by loading and unloading ballast into and from the side columns through this opening.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The floating structure of Patent Document 1 needs to be sized to ensure the necessary buoyancy by itself (the side columns). Therefore, as the windmill becomes larger, the floating structure also becomes larger, which may be uneconomical.

[0006] <G An object of the present invention is to propose a temporary float and a method for installing the temporary float that can temporarily reduce the draft of a floating structure and suppress the enlargement of the floating structure.

Means for Solving the Problems

[0007] The temporary floater of the present invention, which solves the aforementioned problems, is for increasing the buoyancy of a floating structure and comprises a floater body attached to the floating structure and a wire for securing the floater body to the floating structure. The wire is connected to the floater body. With such a temporary floater, the buoyancy of the floating structure can be temporarily increased, thereby temporarily reducing the draft of the floating structure and suppressing the enlargement of the floating structure. The wire connected to the floater body can be used as a tow rope when towing the floater body or attaching it to the floating structure, so that the temporary floater can be installed efficiently.

[0008] By arranging the floater bodies so as to face each other on either side of the floating structure, the buoyancy can be increased in a balanced manner. The multiple floater bodies arranged so as to face each other on either side of the floating structure may be connected to the same wire or to different wires. In the case where the floater bodies are arranged on only one side of the floating structure, the buoyancy can be increased in a balanced manner relative to the floating structure if the wire is connected below the floating structure to the wire of other temporary floaters facing the floater bodies on either side of the floating structure.

[0009] The first temporary floater installation method of the present invention comprises the steps of: arranging a towing wire along the side, bottom, and other side of the floating structure; connecting the towing wire to one end of the wire; pulling the towing wire to attach the floater body to one side of the floating structure and to attach the wire to the bottom and other side of the floating structure; and connecting one end of the wire to the other end of the wire on the top surface of the floating structure.

[0010] Furthermore, the second temporary floater installation method includes the steps of: temporarily fixing one end of the wire, which has been pulled up from one side of the floating structure, to the upper surface of the floating structure; passing an unmanned submersible holding the other end of the wire below the floating structure to guide the other end of the wire to the other side of the floating structure; and pulling up the other end of the wire from the other side of the floating structure and connecting it to the one end of the wire.

[0011] Furthermore, the third method for installing a temporary floater includes the steps of: submerging the temporary floater in a deflated state, the floater body being expandable and contractible; positioning the temporary floater so that the floater body is positioned to the side of the floating structure in a plan view; pulling up both ends of the wire and raising the floater body; and connecting both ends of the wire on the upper surface of the floating structure. [Effects of the Invention]

[0012] According to the temporary floater and temporary floater installation method of the present invention, it is possible to temporarily reduce the draft of the floating structure, thereby suppressing the need to enlarge the floating structure. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view showing a wind power generation facility. [Figure 2] This is a perspective view showing a floating foundation with temporary floats installed. [Figure 3] This is a plan view showing a temporary floater of the first embodiment. [Figure 4] This is a flowchart showing the procedure for installing a temporary floater according to the first embodiment. [Figure 5] This is a cross-sectional view showing the temporary floater launching process. [Figure 6] This is a cross-sectional view showing the process of arranging traction wires and connecting traction wires. [Figure 7] This is a cross-sectional view showing the wire attachment process and the wire fixing process. [Figure 8] It is a plan view showing a provisional float of the second embodiment. [Figure 9] It is a flowchart showing the procedure of the method for installing a provisional float of the second embodiment. [Figure 10] It is a cross-sectional view showing the temporary fixing process. [Figure 11] It is a cross-sectional view showing the process of attaching a wire, where (a) is before the wire is guided by an unmanned underwater vehicle, and (b) is after the guidance. [Figure 12] It is a cross-sectional view showing the process of fixing a wire, where (a) is when positioning the float body, and (b) is when connecting the ends of the wires. [Figure 13] It is a plan view showing a provisional float of the third embodiment. [Figure 14] It is a flowchart showing the procedure of the method for installing a provisional float of the third embodiment. [Figure 15] It is a cross-sectional view showing the process of the provisional float taking in water. [Figure 16] It is a view showing the process of sinking and positioning the provisional float, where (a) is a cross-sectional view and (b) is a plan view. [Figure 17] It is a cross-sectional view showing the process of the provisional float surfacing. [Figure 18] It is a cross-sectional view showing the process of fixing a wire.

Mode for Carrying Out the Invention

[0014] <First Embodiment> In the first embodiment, the case of constructing the wind power generation facility 1 will be described. Fig. 1 shows the wind power generation facility 1 of this embodiment. The wind power generation facility 1 is an offshore wind power generation facility, and includes an upper structure 2 having a windmill 21 and a support column 22 that supports the windmill 21, and a floating foundation (floating structure) 3 that supports the upper structure 2. The upper structure 2 is provided at a position higher than the water surface via a floating foundation (float) 3 moored on the water.

[0015] The wind turbine 21 comprises a nacelle 23 provided at the upper end of a support column 22, a rotor 24 provided at the tip of the nacelle 23, and a plurality of blades 25, 25, 25 (three in this embodiment) arranged radially around the rotor 24. The rotor 24 (blades 25) is rotatable around a horizontal axis and is supported by the nacelle 23. The nacelle 23 is rotatable around a vertical axis and is supported by the support column 22. The support column (tower) 22 is erected on a floating foundation 3.

[0016] The floating foundation 3 of this embodiment includes a center column 31 that supports the support columns 22 of the wind turbine 21, four side columns 32, 32, 32 arranged at intervals around the center column 31, and beams 33, 33, 33 that connect the center column 31 and each of the side columns 32.

[0017] As shown in Figure 1, the center column 31 has a frustoconical shape and is positioned in the center of the floating foundation 3. The side columns 32 are cylindrical in shape and three are arranged around the center column 31. The spacing between adjacent side columns 32 is the same. The side columns 32 are connected to the center column 31 via beams 33.

[0018] The beam 33 connects the center column 31 and the side column 32. One end of the beam 33 is connected to the center column 31, and the other end of the beam 33 is connected to the side column 32. In this embodiment, the beam 33 has the shape of a rectangular prism turned on its side, but the cross-sectional shape of the beam 33 is not limited.

[0019] The construction procedure for wind power generation facility 1 is as follows: First, a floating foundation 3 is fabricated in a dry area such as the ground level or a dry dock. In this embodiment, the floating foundation 3 (center column 31, side columns 32, and beam 33) is fabricated by connecting divided parts fabricated in various ways. Note that the method of fabricating the floating foundation 3 is not limited to the method of fabricating by combining precast members.

[0020] Next, the floating foundation 3, which was fabricated in the dry area, is launched. The method of launching the floating foundation 3 (launching procedure) is not limited; for example, the floating foundation 3 may be launched from the quay using a crane or the like, or it may be loaded onto a barge or the like, moved to the designated location, and then launched. If the floating foundation 3 was fabricated in a dry dock, the floating foundation 3 may be launched by filling the dry dock with water. After launching, the floating foundation 3 is towed or otherwise positioned in the designated location.

[0021] Once the floating foundation 3 is positioned in the predetermined location, temporary floaters 4 are installed on the floating foundation 3 (floating structure) to increase buoyancy. Figure 2 shows the floating foundation 3 with the temporary floaters 4 installed. As shown in Figure 2, in this embodiment, the temporary floaters 4 are installed on the beam 33. The temporary floater 4 comprises a floater body 41 attached to the beam 33 and wires 42 that secure the floater body 41 to the beam 33.

[0022] The floater body 41 is a flexible bag. Air is injected into the inside of the floater body 41. When inflated, the floater body 41 is cylindrical and attached to the side of the beam 33. In this embodiment, two floater bodies 41, 41 are arranged vertically on each side of the beam 33. The shape, dimensions, and number of floater bodies 41 are not limited. Furthermore, the material constituting the floater body 41 is not limited; for example, it may be made of non-breathable resin or rubber, or it may be made of cloth with a coating to enhance airtightness. In addition, the bag constituting the floater body 41 may have a multi-layer structure.

[0023] The wire 42 is arranged around the beam 33 and connected to the upper and lower two-tiered floater bodies 41, 41. The wire 42 has a length that can enclose the beam 33 and the floater bodies 41. Figure 3 shows the temporary floater 4. As shown in Figure 3, multiple wires 42 are connected to the floater body 41. The material constituting the wire 42 is not limited as long as it is flexible and has a predetermined strength; in this embodiment, a strip-shaped belt material is used. The wire 42 is fixed to the floating foundation 3 by connecting both ends via a connecting jig 43 (see Figure 7) on the upper surface of the beam 33. The wire 42 is also connected to the wires 42 of other temporary floaters 4 facing the floater body 41 across the beam 33 via connecting devices (not shown), such as jigs or connecting wires, below the beam 33.

[0024] Figure 4 shows the procedure for installing a temporary floater. As shown in Figure 4, the temporary floater installation method comprises a temporary floater launching step S11, a towing wire arrangement step S12, a towing wire connection step S13, a wire attachment step S14, a wire fixing step S15, and a wire joining step S16.

[0025] Figure 5 shows the temporary floater launching process S11. In the temporary floater launching process S11, as shown in Figure 5, the temporary floater 4 is launched and moved (towed) to the vicinity of the floating foundation 3. At this time, the floater bodies 41, 41 are filled with air (so that they float on the water). In addition, a buoy 44 is attached to the wire 42 to prevent the wire 42 from being submerged.

[0026] Figure 6 shows the traction wire arrangement process S12 and the traction wire connection process S13. As shown in Figure 6, in the traction wire arrangement process S12, the traction wire 5 is arranged along one side, bottom, and the other side of the beam 33. The traction wire 5 is made of a material that is flexible and has a predetermined strength, and in this embodiment, wire is used. Wire insertion fittings 45 through which the traction wire 5 and wire 42 can be inserted are pre-installed on the upper and lower sides of the beam 33, and the traction wire 5 is inserted into the wire insertion fittings 45. A hoisting machine 6, such as a winch, is installed on top of the beam 33. Then, the end of the traction wire 5 that has been pulled up onto the beam 33 from the other side is connected to the hoisting machine 6.

[0027] In extension wire connection process S13, the base end of the traction wire 5 (the end on one side of the beam 33) is connected to one end of the wire 42. Figure 7 shows the wire attachment process S14 and the wire fixing process S15. As shown in Figure 7, in the wire attachment process S14, the towing wire 5 is pulled using the hoisting machine 6 to insert the wire 42 into the wire insertion fitting 45, attaching the floater body 41 to one side of the beam 33, and attaching the wire 42 to the bottom and other side of the beam 33. At this time, the buoy 44 is removed from the wire 42, and the air inside the floater body 41 located on the lower side is discharged.

[0028] In the wire fixing process S15, one end of the wire 42 and the other end of the wire 42 are connected on the upper surface of the beam 33. Similarly, the temporary floater launching process S11 to the wire fixing process S15 are carried out to attach the floater body 41 to the other side of the beam 33. Once the floater bodies 41 are positioned opposite each other with the beam 33 in between, the wires 42 joined to the floater bodies 41 opposite each other with the beam 33 in between are connected below the beam 33 using connecting devices (not shown), such as jigs or connecting wires (wire connecting process S16).

[0029] When installing the superstructure 2 on the floating foundation 3, air is injected into the floater body 41 to increase the buoyancy of the floating foundation 3 (see Figure 2). This controls the increase in draft due to the weight of the superstructure 2. By installing the superstructure 2 on the floating foundation 3, the wind power generation facility 1 is formed. The wind power generation facility 1 is towed to a predetermined position as needed. Once the wind power generation facility 1 has been towed to the predetermined position, the temporary floater 4 is removed. After the removal of the temporary floater 4, it is moved as needed.

[0030] According to the temporary floater 4 of this embodiment, the buoyancy of the floating structure can be temporarily increased, thus suppressing the need to enlarge the floating structure. The wire 42 connected to the floater body 41 can be used as a tow rope when towing the floater body 41 or attaching it to the floating structure, thus enabling efficient installation of the temporary floater 4.

[0031] If temporary floaters 4 are attached to the floating foundation 3 on the ground, there is a risk that the temporary floaters 4 may come into contact with something and be damaged when the floating foundation 3 is launched into the water. However, in this embodiment, since the temporary floaters 4 are installed on the floating foundation 3 after it has been launched into the water, damage to the temporary floaters 4 can be suppressed. Since the floater body 41 is positioned opposite the beam 33, buoyancy can be increased in a balanced manner.

[0032] Furthermore, since the wire 42 is connected to the wire 42 of other temporary floaters 4 that are opposite the floater body 41 across the beam 33, below the beam 33, the buoyancy of the floating structure can be increased in a balanced manner. If the floater bodies 41 opposite each other across the beam 33 were independently arranged, there would be a risk of displacement due to the buoyancy of the floater bodies 41, but by connecting them below the beam 33, balance can be maintained and displacement of the floater bodies 41 can be suppressed.

[0033] By adjusting the amount of air (gas) inside the floater body 41, the buoyancy of the floating foundation 3 can be adjusted, and consequently, the draft height can be adjusted. Since the floater body 41 is fixed to the floating foundation 3 by wrapping the wire 42 around it, the temporary floater 4 can be installed without performing any major modifications to the floating foundation 3. Because the floater body 41 is a flexible bag, it can be folded when not in use, saving space during transport and storage.

[0034] <Second Embodiment> In the second embodiment, the case in which the wind power generation facility 1 (see Figure 1) is constructed will be described, similar to the first embodiment. Since the details of the wind power generation facility 1 are the same as those of the wind power generation facility 1 in the first embodiment, a detailed explanation will be omitted.

[0035] The construction of wind power generation facility 1 begins with fabricating a floating foundation 3 in a dry area such as above ground. Next, the floating foundation 3 fabricated in the dry area is launched into the water. After launching, the floating foundation 3 is towed or otherwise positioned in the designated location.

[0036] Once the floating foundation 3 is positioned in the predetermined location, temporary floaters 4 are installed on the floating foundation 3 (floating structure) to increase buoyancy. The temporary floaters 4 are installed on the beam 33 (see Figure 2). Figure 8 shows the temporary floater 4. As shown in Figure 8, the temporary floater 4 of this embodiment comprises a floater body 41 attached to the beam 33, a plurality of wires 42 that secure the floater body 41 to the beam 33, and connecting rods 46 attached to the ends of the wires 42. The details of the floater body 41 and wires 42 are the same as those of the temporary floater 4 described in the first embodiment, so a detailed explanation is omitted.

[0037] Figure 9 shows the procedure for installing a temporary floater. As shown in Figure 9, the temporary floater installation method comprises a temporary floater launching step S21, a temporary fixing step S22, a wire attachment step S23, a wire fixing step S24, and a wire joining step S25.

[0038] In the temporary floater launching process S21, the temporary floater 4 is launched and moved (towed) to the vicinity of the floating foundation 3. At this time, the floater bodies 41, 41 are filled with air. Also, as shown in Figure 8, a buoy 44 is attached to the wire 42 to prevent the entire wire 42 from being submerged. Furthermore, both ends of the multiple wires 42, 42, ... are attached to connecting rods 46 (steel rods in this embodiment).

[0039] Figure 10 shows the temporary fastening process S22. As shown in Figure 10, in the temporary fastening process S22, one end of the wire 42, which has been pulled up from one side of the beam 33, is temporarily fastened to the upper surface of the beam 33. When pulling the wire 42 up to the upper surface of the beam 33, this can be done by winding up the towing wire 5 (wire) attached to the connecting rod 46 using a hoisting machine 6 such as a winch that has been pre-installed on the beam 33. In this way, multiple wires 42 can be pulled up at once via the connecting rod 46. At this time, the air inside the floater body 41 is adjusted, and the position is adjusted when attaching it to one side of the beam 33.

[0040] Figure 11 shows the wire attachment process S23. In the wire attachment process S23, as shown in Figure 11(b), the wire 42 is attached to one side, bottom, and the other side of the beam 33. Specifically, as shown in Figure 11(a), first, the unmanned submersible vehicle 7 is attached to a towing wire 5 (wire) extending from a connecting rod 46 to which the other end of the wire 42 is attached. Next, as shown in Figures 11(a) and (b), the unmanned submersible vehicle 7 is guided under the beam 33 to lead the other end of the wire 42 to the other side of the beam 33.

[0041] Figure 12 shows the wire fixing process S24. As shown in Figures 12(a) and (b), in the wire fixing process S24, one end of the wire 42 and the other end of the wire 42 are connected on the upper surface of the beam 33. Specifically, as shown in Figure 12(a), first, the other end of the wire 42 is pulled up from the other side of the beam 33. At this time, the buoy 44 and connecting rod 46 are removed from the wire 42, and the air inside the floater body 41 is discharged. Next, the wire 42 is raised and lowered using a hoisting machine such as a chain block to position the floater body 41. After positioning the floater body 41, as shown in Figure 12(b), the ends of the wire 42 are connected to fix the temporary floater 4.

[0042] Similarly, the temporary floater launching process S21 to the wire fixing process S24 are carried out to attach the floater body 41 to the other side of the beam 33. Once the floater bodies 41 are positioned opposite each other with the beam 33 in between, the wires 42 joined to the floater bodies 41 opposite each other with the beam 33 in between are connected to each other below the beam 33 via connecting devices (not shown), such as jigs or connecting wires (wire connection process S25).

[0043] When installing the superstructure 2 on the floating foundation 3, air is injected into the floater body 41 to increase the buoyancy of the floating foundation 3 (see Figure 2). This controls the increase in draft due to the weight of the superstructure 2. By installing the superstructure 2 on the floating foundation 3, the wind power generation facility 1 is formed. The wind power generation facility 1 is towed to a predetermined position as needed. Once the wind power generation facility 1 has been towed to the predetermined position, the temporary floater 4 is removed. After the removal of the temporary floater 4, it is moved as needed.

[0044] According to the temporary floater 4 and temporary floater installation method of this embodiment, the same effects and advantages as those of the temporary floater 4 of the first embodiment can be obtained. Furthermore, using the unmanned underwater vehicle 7 can reduce the amount of manual labor required from divers and other personnel. Furthermore, since connecting rods 46 are attached to the ends of the wires 42, multiple wires 42 can be pulled simultaneously.

[0045] <Third Embodiment> In the third embodiment, the case in which the wind power generation facility 1 (see Figure 1) is constructed will be described, similar to the first embodiment. Since the details of the wind power generation facility 1 are the same as those of the wind power generation facility 1 in the first embodiment, a detailed explanation will be omitted.

[0046] The construction of wind power generation facility 1 begins with fabricating a floating foundation 3 in a dry area such as the ground. Next, the floating foundation 3 fabricated on the ground is launched into the water. After launching, the floating foundation 3 is towed or otherwise positioned in the designated location.

[0047] Once the floating foundation 3 is positioned in the predetermined location, temporary floaters 4 are installed on the floating foundation 3 (floating structure) to increase buoyancy. In this embodiment, the temporary floaters 4 are installed on the beam 33 (see Figure 2). The temporary floater 4 comprises a floater body 41 attached to the beam 33 and a wire 42 that secures the floater body 41 to the beam 33. Figure 13 shows the temporary floater 40 of the third embodiment. In the temporary floater 40 of the third embodiment, multiple floater bodies 41 are arranged opposite each other on either side of the beam 33 and are joined to the same wire 42. The details of the other floater bodies 41 are the same as those of the floater body 41 of the first embodiment, so a detailed explanation is omitted.

[0048] The wires 42 are connected to two upper and lower (four in total) floater bodies 41, 41, which are arranged on both sides of the beam 33, and are arranged around the beam 33. Figure 3 shows the temporary floater 4. As shown in Figure 13, multiple wires 42 are connected to the floater body 41. The material constituting the wires 42 is not limited as long as it is flexible and has a predetermined strength, and in this embodiment, a strip-shaped belt material is used. The wires 42 are fixed to the floating foundation 3 by connecting both ends via a connecting jig 43 on the upper surface of the beam 33.

[0049] Figure 14 shows the procedure for installing temporary floaters. As shown in Figure 14, the temporary floater installation method comprises a temporary floater launching step S31, a temporary floater sinking step S32, a temporary floater positioning step S33, a temporary floater floating step S34, and a wire fixing step S35.

[0050] Figure 15 shows the temporary floater launching process S31. In the temporary floater launching process S31, as shown in Figure 15, the temporary floater 4 is launched and moved (towed) to the vicinity of the floating foundation 3. At this time, the floater bodies 41, 41 are filled with air. A buoy 44 is attached to the wire 42.

[0051] Figure 16 shows the temporary floater sinking process S32 and the temporary floater positioning process S33. In the temporary floater sinking process S32, as shown in Figure 16(a), the temporary floaters 4 are deflated by exhausting the internal air and then sunk. When sinking the temporary floaters 4, weights (not shown) may be attached as needed. Once a predetermined number of temporary floaters 4 have been sunk, the floating foundation 3 is towed above the temporary floaters 4. In the temporary floater positioning process S33, as shown in Figure 16(b), the floater body 41 is positioned so that it is located to the side of the beam 33 in a plan view.

[0052] Figure 17 shows the temporary floater buoyancy process S34. In the temporary floater buoyancy process S34, as shown in Figure 17, both ends of the wire 42 are pulled up and the floater body 41 is made to float. At this time, the amount of air inside the floater body 41 is adjusted (for example, air is pressurized into the inside of the floater body 41 located in the upper position) to make the floater body 41 float. Also, a buoy 44 is attached to the end of the wire 42.

[0053] Figure 18 shows the wire fixing process S35. In the wire fixing process S35, one end of the wire 42 and the other end of the wire 42 are connected on the upper surface of the beam 33. As a result, the floater bodies 41 are attached to both sides of the beam 33.

[0054] When installing the superstructure 2 on the floating foundation 3, air is injected into the floater body 41 to increase the buoyancy of the floating foundation 3 (see Figure 2). This controls the increase in draft due to the weight of the superstructure 2. By installing the superstructure 2 on the floating foundation 3, the wind power generation facility 1 is formed. The wind power generation facility 1 is towed to a predetermined position as needed. Once the wind power generation facility 1 has been towed to the predetermined position, the temporary floater 40 is removed. After the removal of the temporary floater 40, it is moved further as needed.

[0055] According to the temporary floater 40 and temporary floater installation method of this embodiment, since the floater bodies 41 facing each other across the floating structure (beam 33) are pre-connected to the same wire 42, the floater bodies 41 can be installed efficiently, and the buoyancy of the floating structure can be increased in a balanced manner.

[0056] Furthermore, the effort of connecting the wires 42 connected to the floater bodies 41 facing each other across the floating structure at the bottom of the floating structure can be eliminated. The effects and advantages of the temporary floater 40 and temporary floater installation method of this embodiment are the same as those of the temporary floater 4 and temporary floater installation method of the first embodiment, so a detailed explanation will be omitted.

[0057] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and each of the above-mentioned components can be modified as appropriate without departing from the spirit of the present invention. For example, in the embodiment, the case where the floating foundation 3 is of the semi-submersible type was described, but the structure of the floating foundation 3 is not limited, and it may be of the barge type, for example. Furthermore, the number of side columns 32 constituting the floating foundation 3 is not limited; for example, there may be four. Also, the support columns 22 of the wind turbine 21 may be erected on the side columns 32.

[0058] In the above embodiment, the case in which a temporary floater 4 is used during the manufacture of the wind power generation facility 1 was described, but the floating structure to which the temporary floater 4 is connected is not limited to the floating foundation 3 of the wind power generation facility 1. The material constituting the wire 42 is not limited to those shown in the above embodiment, and may be, for example, wire, rope, or carbon fiber. It may be suppressed. The floater body 41 is not limited to a cylindrical shape; for example, it may be prismatic. Furthermore, the arrangement of the floater body 41 is not limited. In the first and second embodiments, the wires 42 joined to the floater bodies 41 facing each other across the beam 33 are connected below the beam 33 via a connector (not shown). However, the wires 42 do not necessarily need to be connected to each other. For example, the wires 42 may be fixed to the beam 33 so as not to shift due to the buoyancy of the floater body 41. [Explanation of Symbols]

[0059] 1. Wind power generation facilities 2 Superstructure 21 Windmill 22 Posts 23 Nacer 24 rotors 25 blades 3. Floating foundation (floating structure) 31 Center Column 32 Side Columns 33. Beam (Floating Structure) 4,40 Temporary floaters 41 Floater body 42 Wire rod 43. Connecting jig 44 Bu 45 Wire insertion fitting 46 Connecting rod 5 Traction wire 6 Hoisting machine 7 Unmanned underwater vehicle

Claims

1. A temporary floater that increases the buoyancy of a floating structure, A floater body attached to the aforementioned floating structure, The floater body is equipped with wires for securing it to the floating structure, A temporary floater characterized in that the aforementioned wire is connected to the floater body.

2. The temporary floater according to claim 1, characterized in that the wire is connected to the wire of another temporary floater that faces the floater body with the floating structure in between, below the floating structure.

3. The temporary floater according to claim 1, characterized in that a plurality of floater bodies, which are arranged opposite each other on either side of the floating structure, are joined to the same wire.

4. A method for installing a temporary floater according to claim 1 on a floating structure, The process of arranging traction wires along the side, bottom, and other side of the floating structure, A step of connecting the traction wire to one end of the aforementioned wire, The process involves pulling the aforementioned towing wire to attach the floater body to one side of the floating structure, and attaching the wire to the bottom surface and the other side of the floating structure. A method for installing a temporary floater, comprising the step of connecting one end of the wire to the other end of the wire on the upper surface of the floating structure.

5. A method for installing a temporary floater according to claim 1 on a floating structure, The process involves temporarily fixing one end of the wire, which has been pulled up from one side of the floating structure, to the upper surface of the floating structure. The process involves moving an unmanned submersible vehicle, which is holding the other end of the wire, beneath the floating structure to guide the other end of the wire to the other side of the floating structure, A method for installing a temporary floater, characterized by comprising the step of pulling up the other end of the wire from the other side of the floating structure and connecting it to the other end of the wire.

6. The method for installing a temporary floater according to claim 4 or claim 5, further comprising the step of connecting wires joined to floater bodies facing each other across the floating structure below the floating structure.

7. A method for installing a temporary floater according to claim 3 on a floating structure, The floater body is expandable and contractible, The process involves submerging the deflated temporary floater, A step of positioning the temporary floats such that the float body is located to the side of the floating structure in a plan view, The process involves lifting both ends of the wire and raising the floater body, A method for installing a temporary floater, characterized by comprising the step of connecting both ends of the wire on the upper surface of the floating structure.

Images