Jacket structure system for offshore wind turbine, and method for transporting jacket structure for offshore wind turbine

Abstract

To provide a jacket structure system for an offshore wind turbine and a method for transporting a jacket structure for an offshore wind turbine, capable of stably transporting a jacket structure for an offshore wind turbine using a transport carriage.SOLUTION: A jacket structure system for an offshore wind turbine comprises a jacket structure for an offshore wind turbine having a plurality of legs. During transportation of the jacket structure for an offshore wind turbine, a first leg 11 included in the plurality of legs is placed on each of a first transport carriage D1 and a second transport carriage D2. The first leg 11 is sandwiched between the first transport carriage D1 and the second transport carriage D2.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a jacket structure system for an offshore wind turbine and a transportation method for a jacket structure for an offshore wind turbine. [Background technology]

[0002] Conventionally, jacket structures for offshore wind turbines have been transported by means of transport carriages. Patent Document 1 discloses providing stabbing for legs in a jacket structure for an offshore wind turbine on a support member and transporting the lower jacket using a dolly. Patent Document 2 discloses transporting a transition piece of a monopile foundation using a multi-axle cart. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-46721 [Patent Document 2] Patent Publication No. 2022-40823 Summary of the Invention [Problem to be solved by the invention]

[0004] However, Patent Document 1 does not disclose how to use a dolly to transport the lower jacket. Furthermore, Patent Document 2 does not assume that the jacket structure will be transported by a multi-axle dolly.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide an offshore wind turbine jacket structure system capable of stably transporting an offshore wind turbine jacket structure using a transport cart, and a method for transporting an offshore wind turbine jacket structure. [Means for solving the problem]

[0006] <1> A jacket structure system for an offshore wind turbine according to aspect 1 of the present disclosure is a jacket structure system for an offshore wind turbine comprising an offshore wind turbine jacket structure having a plurality of legs, characterized in that, during transportation of the offshore wind turbine jacket structure, a first leg included in the plurality of legs is placed on each of a first transport cart and a second transport cart, and the first leg is sandwiched between the first transport cart and the second transport cart. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide an offshore wind turbine jacket structure system capable of stably transporting an offshore wind turbine jacket structure using a transport cart, and a transport method for an offshore wind turbine jacket structure. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of an offshore wind turbine jacket structure system according to a first embodiment. [Diagram 2] FIG. 2 is an enlarged view of part II shown in FIG. [Diagram 3] FIG. 11 is a first side view showing a state in which the first leg is placed on the first placement table. [Figure 4] FIG. 2 is a second side view showing a state in which the first leg is placed on the first placement table. [Diagram 5] FIG. 5 is an enlarged view of a portion V in FIG. [Figure 6] FIG. 5 is a plan view of FIG. [Figure 7] FIG. 2 is a front view showing a state in which the first leg is sandwiched between the first transporting carriage and the second transporting carriage. [Figure 8] FIG. 8 is a plan view of FIG. [Figure 9] FIG. 11 is a perspective view of an offshore wind turbine jacket structure system according to a second embodiment. [Figure 10] FIG. 10 is an enlarged view of part IX in FIG. [Figure 11] 11 is a view taken in the direction of the arrow X in FIG. 10. [Figure 12] FIG. 10 is an enlarged view of a portion XI in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (First embodiment) Hereinafter, an offshore wind turbine jacket structure system according to an embodiment of the present disclosure will be described with reference to the drawings. The jacket structure system for an offshore wind turbine includes a jacket structure for an offshore wind turbine having a plurality of legs. In this embodiment, the jacket structure for an offshore wind turbine included in the jacket structure system for an offshore wind turbine may be in a completed state or may be in the process of being manufactured. The jacket structure system for an offshore wind turbine includes, for example, one or more jacket structures for an offshore wind turbine. The jacket structure for an offshore wind turbine is installed offshore by being connected to steel pipe piles driven into the seabed. The jacket structure for an offshore wind turbine supports an offshore wind turbine (not shown) offshore. In addition, when the offshore wind turbine jacket structure system includes a plurality of offshore wind turbine jacket structures, the structures or shapes of the plurality of offshore wind turbine jacket structures may all be the same or different from each other.

[0010] Hereinafter, a configuration of the first offshore wind turbine jacket structure 10, which is one of the offshore wind turbine jacket structures included in the offshore wind turbine jacket structure system 1 according to this embodiment, will be described. FIG. 1 is a perspective view of an offshore wind turbine jacket structure system 1 according to a first embodiment. FIG. 2 is an enlarged view of part II shown in FIG. FIG. 3 is a first side view showing a state in which the first leg 11 is placed on the first placement stand S1. FIG. 4 is a second side view showing the state in which the first leg 11 is placed on the first placement stand S1. FIG. 5 is an enlarged view of part V in FIG. FIG. 6 is a plan view of FIG. FIG. 7 is a front view showing a state in which the first leg 11 is sandwiched between the first transporting carriage D1 and the second transporting carriage D2. FIG. 8 is a plan view of FIG.

[0011] (Configuration of first offshore wind turbine jacket structure 10) As shown in FIG. 1, a first offshore wind turbine jacket structure 10 includes a first leg 11, a brace 12, and a transition piece 13. The first leg 11 is a leg included in the first offshore wind turbine jacket structure 10. The first leg 11 extends in the up-down direction. In this embodiment, the first leg 11 is a cylindrical member. In other words, the first leg 11 is a hollow member. A lower part of the first leg 11 is connected to an upper end of a steel pipe pile (not shown). An upper end of the first leg 11 is connected to a transition piece 13. At this time, the first leg 11 may be bent or curved as appropriate according to the dimensions of the transition piece 13 connected to the upper end and the spacing between the steel pipe piles connected to the lower ends. In this embodiment, the first offshore wind turbine jacket structure 10 includes a plurality of first legs 11. Specifically, the first offshore wind turbine jacket structure 10 has four first legs 11.

[0012] In this embodiment, the first leg 11 and the steel pipe pile are connected by inserting the lower part of the first leg 11 into the inside of the steel pipe pile from the upper end of the steel pipe pile. After the connection, the first leg 11 and the steel pipe pile are fixed by filling grout between the outer circumferential surface of the first leg 11 and the inner circumferential surface of the steel pipe pile. Here, if grout flows into the inside of the first leg 11, this will cause extra grout to be required to fix the first leg 11 and the steel pipe pile. To prevent this, a cover member 11C (see FIG. 3) is provided at the bottom of the first leg 11 to close the opening of the cylindrical first leg 11 and prevent grout from flowing into the inside of the first leg 11. This makes it possible to reduce the amount of grout required to fix the first leg 11 and the steel pipe pile.

[0013] In this embodiment, the diameter of the cover member 11C is larger than the diameter of the lower part of the first leg 11. As a result, the cover member 11C forms a flange-shaped portion at the lower part of the first leg 11. Hereinafter, this portion is referred to as a flange portion 11f. A claw portion S1c of the first installation stand S1, which will be described later, engages with the flange portion 11f. This makes it possible to prevent the first leg 11 from floating up from the first installation stand S1 (details will be described later).

[0014] When inserting the first leg 11 into the inside of the steel pipe pile or when installing the lower part of the first leg 11 on the first installation stand S1, it is necessary to appropriately align the lower end of the first leg 11. To facilitate this alignment, a cross-shaped member 11G is provided at the lower end of the first leg 11. The cross-shaped member 11G functions as a guide that leads the lower end of the first leg 11 to the upper end of the steel pipe pile or a hole S1h (see FIG. 6) of the first installation stand S1 described later. The cross-shaped member 11G is formed in a cross shape when viewed along the axial direction of the lower end of the first leg 11. The cross-shaped member 11G is formed, for example, by combining and arranging a plurality of plate-shaped members in a cross shape.

[0015] 3 and 4, the cross-shaped member 11G is preferably shaped to have an apex 11Gt that protrudes downward at the center in the radial direction of the first leg 11. With this, for example, when aligning the first leg 11 with the steel pipe pile, after the apex 11Gt of the cross-shaped member 11G is inserted into the steel pipe pile, the cross-shaped member 11G continues to abut against the steel pipe pile as the first leg 11 moves downward, so that the central axis of the first leg 11 can be guided to coincide with the central axis of the steel pipe pile. In order to provide the apex 11Gt to the cross-shaped member 11G, each of the plate-like members forming the cross-shaped member 11G is preferably trapezoidal or triangular, for example. In addition, in order to facilitate the alignment of the first leg 11 with the steel pipe pile or the first installation base S1 by the cross-shaped member 11G, the dimension of the cross-shaped member 11G in a direction perpendicular to the axial direction of the lower end of the first leg 11 is preferably approximately the same as the diameter of the cover member 11C, for example. Alternatively, the dimension of the cross-shaped member 11G in a direction perpendicular to the axial direction of the lower end of the first leg 11 may be larger than the diameter of the cover member 11C as shown in FIG. 6, as long as the cross-shaped member 11G can be accommodated inside the steel pipe pile.

[0016] The braces 12 connect the four first legs 11 to each other along the circumferential direction of the first offshore wind turbine jacket structure 10. The braces 12 are joined to the first legs 11 by, for example, welding. In this way, the braces 12 reinforce the structure made up of the four first legs 11. The transition piece 13 is a portion of the first offshore wind turbine jacket structure 10 to which the offshore wind turbine is connected. Specifically, a lower end of the offshore wind turbine tower is connected to the transition piece 13. In addition, the transition piece 13 is supported by the four legs described above. With each of the above configurations, the first offshore wind turbine jacket structure 10 supports the offshore wind turbine.

[0017] (Aspects of the first offshore wind turbine jacket structure during production and transportation) The first offshore wind turbine jacket structure 10 according to this embodiment is manufactured by assembling the above-mentioned components in an onshore yard (factory), and then transported to an offshore installation site. Then, it is installed on the sea by connecting it to steel pipe piles that have been driven into the seabed in advance. Also, the first offshore wind turbine jacket structure 10 is transported on land by a transport platform D according to each process during the manufacturing process, as shown in Figs. 1 and 2.

[0018] Hereinafter, the manner in which the first offshore wind turbine jacket structure 10 according to this embodiment is manufactured and transported will be described. That is, for example, when the first offshore wind turbine jacket structure 10 is manufactured, each of the multiple first legs 11 is installed on a first installation stand S1 as shown in Fig. 3 or Fig. 4. The first offshore wind turbine jacket structure 10 being manufactured is transported by moving the first installation stand S1 on which the first legs 11 are installed by a transport carriage D as shown in Figs. 1 and 2. At this time, the first installation stand S1 and the transport carriage D are connected by a horizontal member H (see Fig. 7). This makes it possible to move the first installation stand S1 and the first legs 11 by the transport carriage D.

[0019] (1st installation stand) In the first offshore wind turbine jacket structure 10, the work of connecting the first legs 11 together with the braces 12 is performed in a state in which the first legs 11 are leaned against a jig (not shown). At this time, the lower part of the first leg 11 is placed on a first installation stand S1 (installation stand) placed on the ground. As shown in FIG. 3 or 4, the first installation stand S1 includes a first leg portion S1a, a first beam portion S1b, a claw portion S1c, and a contact member S1d. The first leg S1a is a portion that comes into contact with the ground. The first leg S1a extends, for example, horizontally along the ground. At this time, the first leg S1a extends, for example, along the traveling direction when the first offshore wind turbine jacket structure 10 is transported. This allows the transport carriage D to be placed along the longitudinal direction of the first leg S1a. The first leg S1a may be, for example, a known H-beam or I-beam. In this case, the first leg S1a is arranged, for example, so that the web portion is perpendicular to the ground and the flange portion is in contact with the ground. On the first installation stand S1, two first legs S1a are provided substantially parallel to each other. In this embodiment, substantially parallel means that the relative angle is 5° or less. In this way, when the first leg 11 is installed on the first installation stand S1, the lower part of the first leg 11 is positioned between the two first legs S1a. As shown in Fig. 3 to Fig. 6, each of the two first legs S1a has a joint S1a1 to which a horizontal member H described later can be pin-joined. The joint S1a1 is provided on the upper part of each of the first legs S1a. Two joints S1a1 are provided on each of the two first legs S1a.

[0020] The first beam S1b connects the two first legs S1a to each other. That is, the first beam S1b extends in a direction perpendicular to the direction in which the first leg S1a extends among directions along the ground. Then, both ends of the first beam S1b are respectively joined to the two first legs S1a provided substantially in parallel. For example, a known H-shaped steel or I-shaped steel is used for the first beam S1b. At this time, the first beam S1b is arranged, for example, such that the web portion is perpendicular to the ground and the flange portion is in contact with the ground. In the first installation stand S1, two first beams S1b are provided substantially in parallel. Thereby, when the first leg 11 is installed on the first installation stand S1, the lower part of the first leg 11 is positioned between the two first beams S1b.

[0021] As described above, when the first leg 11 is installed on the first installation stand S1, the lower part of the first leg 11 is located between the two first legs S1a and between the two first beams S1b. In other words, the first installation stand S1 has a hole S1h formed by the two first legs S1a and the two first beams S1b, and the first leg 11 is installed on the first installation stand S1 such that the lower part of the first leg 11 is inserted into the hole S1h. At this time, as shown in Figs. 3 and 4, the cross-shaped member 11G is inserted into the hole S1h. In this way, the cross-shaped member 11G functions as a guide when the first leg 11 is installed on the first installation stand S1. In this embodiment, the lower end of the cross-shaped member 11G inserted into the hole S1h does not contact the ground or the first installation base S1. That is, in this embodiment, as shown in FIG. 4, the height h1 of the first leg S1a and the first beam S1b is equal to or greater than the height h2 of the cross-shaped member 11G. Also, as shown in FIG. 6, the size of the hole S1h in plan view is such that the cross-shaped member 11G can be accommodated without interfering with the hole S1h. This makes it possible to prevent a load such as the weight of the first leg 11 from acting on the cross-shaped member 11G.

[0022] When the cross-shaped member 11G of the first leg 11 is inserted into the hole S1h of the first installation stand S1, the cover member 11C of the first leg 11 abuts against the upper surface of the first leg S1a and the first beam S1b of the first installation stand S1, as shown in Figs. 3 to 6. This allows the first leg 11 to be installed on the first installation stand S1. At this time, it is preferable that the first leg S1a and the first beam S1b are the same height so that the contact area of ​​the cover member 11C of the first leg 11 with the two first leg S1a and the two first beam S1b is equalized to allow the load of the first leg 11 to act evenly. In addition, it is preferable that the hole S1h formed by the two first leg S1a and the two first beam S1b is square-shaped, with the length of one side being smaller than the diameter of the cover member 11C and large enough to accommodate the cross-shaped member 11G. Moreover, the length of one side of hole S1h is preferably long enough to accommodate cross-shaped member 11G without interfering with hole S1h. That is, even if the dimension of cross-shaped member 11G in a direction perpendicular to the axial direction of the lower end of first leg 11 is greater than the diameter of cover member 11C, it is preferable that the length be long enough to accommodate cross-shaped member 11G by arranging the plates forming cross-shaped member 11G along the diagonal lines of hole S1h in a plan view as shown in FIG.

[0023] The claw portion S1c is a plate-like member attached to the first leg portion S1a or the first beam portion S1b by welding or the like. The claw portion S1c is in a state where it stands on the upper surface of the first leg portion S1a or the first beam portion S1b, and the edge of the plate surface is joined to the first leg portion S1a or the first beam portion S1b. This can, for example, reduce the welding surface of the claw portion S1c to the first leg portion S1a or the first beam portion S1b, thereby improving the workability of welding. 5, the claw portion S1c has a notch S1c1. When the notch S1c1 comes into contact with the cover member 11C of the first leg 11, the claw portion S1c engages with the cover member 11C of the first leg 11. In this way, the claw portion S1c prevents the first leg 11 placed on the first placement stand S1 from lifting up from the first placement stand S1.

[0024] As shown in Fig. 5, the notch S1c1 is provided by cutting out an end of a portion where the claw portion S1c abuts against the first leg portion S1a or the first beam portion S1b. The dimension d1 of the notch S1c1 in a direction along the upper surface of the first leg portion S1a or the first beam portion S1b is large enough to engage with the flange portion 11f formed by the cover member 11C at the lower portion of the first leg 11. The dimension d2 of the notch S1c1 in a direction perpendicular to the upper surface of the first leg portion S1a or the first beam portion S1b is equal to the thickness of the cover member 11C. Here, as described above, the flange portion 11f is formed at the lower portion of the first leg 11 by the cover member 11C having a diameter larger than that of the lower portion of the first leg 11. Therefore, as shown in Fig. 3, after the lower portion of the first leg 11 is inserted into the hole S1h of the first installation stand S1, when the claw portion S1c is attached to the upper surface of the first leg portion S1a and the first beam portion S1b as shown in Fig. 4, the notch S1c1 of the claw portion S1c engages with the cover member 11C. This makes it possible to prevent the first leg 11 installed on the first installation stand S1 from floating up from the first installation stand S1 by the claw portion S1c. The claws S1c are provided evenly on each of the two first legs S1a and the two first beams S1b, for example. That is, as shown in Fig. 6, the claws S1c are provided at two locations near both ends in the longitudinal direction of the contact surface A between the cover member 11C of the first leg 11 and the first leg S1a or the first beam S1b. This preferably ensures that the claws S1c reliably prevent the first leg 11 from lifting up from the first installation base S1.

[0025] 6, the abutment member S1d abuts against the cover member 11C to determine the horizontal position of the lower part of the first leg 11 relative to the first installation stand S1. In this embodiment, the abutment member S1d is, for example, a plate-shaped member attached to each of the first leg S1a and the first beam S1b by welding or the like. Hereinafter, the abutment member S1d provided on one of the two first legs S1a will be described, but the abutment member S1d is also provided in the other first leg S1a and the two first beams S1b in the same manner.

[0026] The contact member S1d is provided in a portion of one of the first legs S1a that corresponds to the middle of one side of the hole S1h. The contact member S1d includes, for example, a contact plate S1d1 that contacts the cover member 11C, and a reinforcing plate S1d2 that reinforces the contact plate S1d1. The abutment plate S1d1 is placed upright on the upper surface of the first leg S1a, and the edge of the plate surface is joined to the first leg S1a. Two abutment plates S1d1 are arranged at an interval on the upper surface of the first leg S1a. The two abutment plates S1d1 have the same shape. Of the edges of the abutment plate S1d1 along the vertical direction, the edge facing the hole S1h preferably has an inclined portion S1ds that inclines away from the hole S1h as it moves from the bottom to the top, as shown in FIG. 3, for example. This allows the cover member 11C in contact with the inclined portion S1ds to be guided toward the center of the hole S1h as it moves downward when the first leg 11 is placed on the first installation stand S1. As shown in Fig. 3 and Fig. 6, the reinforcing plate S1d2 is provided to connect the vertical edges of the first legs 11 of the two abutment plates S1d1, i.e., the horizontal edges that do not face the hole S1h. In other words, when the reinforcing plate S1d2 is placed upright on the upper surface of the first leg S1a, the edges of the plate surface are joined to the upper surface of the first leg S1a and the vertical edges of the two abutment plates S1d1 that do not face the hole S1h. In this way, the reinforcing plate S1d2 prevents the abutment plate S1d1 placed upright on the upper surface of the first leg S1a from falling or deforming due to contact with the cover member 11C or the like. The contact member S1d is not limited to the above-mentioned configuration, and may be, for example, a block-shaped member having a portion equivalent to the inclined portion S1ds.

[0027] (Transport cart) As shown in Fig. 2, the transporting platform D transports the first offshore wind turbine jacket structure 10. The transporting platform D includes a platform Dc on which an object to be transported can be placed, and a plurality of wheels Dt for moving the platform Dc. For example, a known dolly is preferably used as the transporting platform D. The platform Dc is movable in the vertical direction. The transport carriages D are arranged on each of the multiple first legs 11 of the first offshore wind turbine jacket structure 10. For example, when the first offshore wind turbine jacket structure 10 is moved straight, the transport carriages D arranged on each of the first legs 11 move simultaneously in the same direction at the same speed. Alternatively, when the traveling direction of the first offshore wind turbine jacket structure 10 is turned, the speed of each of the transport carriages D is appropriately changed. In this way, the transport carriages D transport the first legs 11 through the first offshore wind turbine jacket structure 10.

[0028] When the first offshore wind turbine jacket structure 10 is transported, the first leg 11 is placed on each of the first transport vehicle D1 and the second transport vehicle D2. At this time, the first leg 11 is sandwiched between the first transport vehicle D1 and the second transport vehicle D2. That is, one first leg 11 is transported by two transport vehicles D. In this embodiment, the first transport vehicle D1 and the second transport vehicle D2 have the same configuration. Hereinafter, in this embodiment, when there is no need to distinguish between the first transport vehicle D1 and the second transport vehicle D2, they will be referred to as the transport vehicle D.

[0029] When the first leg 11 is transported by the transporting platform D, the first leg 11 is transported in a state where it is placed on the first installation stand S1. In this embodiment, the transporting platform D transports the first leg 11 by moving the first installation stand S1. In this embodiment, when the first installation stand S1 is moved by the transporting platform D, one first installation stand S1 is moved by two transporting platforms D. That is, the first installation stand S1 is engaged with each of the first transporting platform D1 and the second transporting platform D2, and is sandwiched between the first transporting platform D1 and the second transporting platform D2. At this time, the transporting platform D is arranged so as to be aligned along the longitudinal direction of the first leg S1a of the first installation stand S1. This allows the first installation stand S1 to move in the direction in which the first leg S1a extends. In this embodiment, the transport vehicle D is locked to the first installation stand S1 via a horizontal member H, which will be described next.

[0030] (horizontal material) The horizontal member H engages the transportation carriage D and the first installation stand S1. The horizontal member H is attached to the first installation stand S1 when the first offshore wind turbine jacket structure 10 is transported, that is, when the first installation stand S1 is moved by the transportation carriage D. The lower surfaces of the first horizontal member H1 and the second horizontal member H2 abut against the upper surfaces of the first transporting carriage D1 and the second transporting carriage D2. That is, the transporting carriage D is arranged so that the loading platform Dc is located under the horizontal member H attached to the first installation stand S1, and the loading platform Dc is moved upward to lift the horizontal member H. In this manner, the transporting carriage D lifts the first installation stand S1 via the horizontal member H. In this embodiment, the term "engagement between the transporting carriage D and the first installation stand S1" refers to a state in which the first installation stand S1 is lifted by the transporting carriage D. In addition, in this embodiment, the term "the first leg 11 is placed on the first transporting carriage D1 and the second transporting carriage D2" refers to the first installation stand S1 on which the first leg 11 is placed being placed on the first transporting carriage D1 and the second transporting carriage D2.

[0031] When the transport cart D and the first installation stand S1 are engaged, a first horizontal member H1 and a second horizontal member H2 are provided on the upper part of the first installation stand S1. The first horizontal member H1 and the second horizontal member H2 have the same configuration. The first horizontal member H1 and the second horizontal member H2 are members that extend along the horizontal direction. At this time, the first horizontal member H1 and the second horizontal member H2 each extend in a direction perpendicular to the direction in which the first leg S1a extends. As shown in FIG. 7, each of the first horizontal member H1 and the second horizontal member H2 is removably pin-joined to the first installation stand S1 by a pin Pi. Specifically, each of the first horizontal member H1 and the second horizontal member H2 is pin-joined to each of the joints S1a1 provided on the two first legs S1a, as shown in FIG. 7. At this time, the first horizontal member H1 is arranged so as to be located on the opposite side of the second horizontal member H2 across the tube axis of the first leg 11. The position where the first horizontal member H1 and the first installation stand S1 are pin-joined is symmetrical to the position where the second horizontal member H2 and the first installation stand S1 are pin-joined across the first leg 11. With this arrangement, the first installation stand S1 can be stably lifted by the transport cart D.

[0032] (Method of transporting jacket structure for offshore wind turbine) Next, a method for transporting the jacket structure for an offshore wind turbine according to this embodiment will be described. That is, in this embodiment, the first jacket structure for an offshore wind turbine 10 is transported by moving the multiple first legs 11 using each of the above-mentioned configurations. At this time, the first legs 11 are placed on the first transport vehicle D1 and the second transport vehicle D2, respectively, and the first legs 11 included in the multiple legs are sandwiched between the first transport vehicle D1 and the second transport vehicle D2. This makes it possible to transport each of the multiple first legs 11 stably.

[0033] As described above, according to the offshore wind turbine jacket structure system 1 of this embodiment, when the first offshore wind turbine jacket structure 10 is transported, the first leg 11 is placed on each of the first transport carriage D1 and the second transport carriage D2. Moreover, the first leg 11 is sandwiched between the first transport carriage D1 and the second transport carriage D2. That is, when the first offshore wind turbine jacket structure 10 is transported, the first leg 11 is positioned between the first transport carriage D1 and the second transport carriage D2. This allows the first offshore wind turbine jacket structure 10 to be stably transported by the multiple transport carriages D.

[0034] Moreover, the first installation stand S1 on which the lower part of the first leg 11 is installed is engaged with each of the first transport carriage D1 and the second transport carriage D2. This allows the first leg 11 to be moved by moving the first installation stand S1 with the first transport carriage D1 and the second transport carriage D2. Therefore, the first installation stand S1 can function as an erection stand when manufacturing the first offshore wind turbine jacket structure 10, and also as a transport stand when transporting the manufactured first offshore wind turbine jacket structure 10. Moreover, the first installation stand S1 is sandwiched between the first transporting carriage D1 and the second transporting carriage D2. This allows the first installation stand S1 to be stably transported by the first transporting carriage D1 and the second transporting carriage D2. Therefore, the first offshore wind turbine jacket structure 10 can be stably transported.

[0035] In addition, the cover member 11C suppresses the flow of grout into the inside of the first leg 11. This makes it possible to suppress the need for extra grout when fixing the steel pipe pile and the first leg 11, which would otherwise be caused by the flow of grout into the inside of the first leg 11. Furthermore, the claw portion S1c engages with the cover member 11C to prevent the first leg 11 from floating up from the first installation stand S1. This allows the cover member 11C to function to suppress the inflow of grout into the first leg 11, as well as to suppress the first leg 11 from floating up from the state in which the first leg 11 is placed on the first installation stand S1.

[0036] Furthermore, the contact member S1d provided on the first installation stand S1 contacts the cover member 11C to determine the horizontal position of the lower part of the first leg 11 relative to the first installation stand S1. This allows the cover member 11C to function to align the first leg 11 relative to the first installation stand S1 in addition to the above-mentioned two functions.

[0037] The lower end of the first leg 11 is provided with a cross-shaped member 11G, and the first installation stand S1 has a hole S1h into which the cross-shaped member 11G is inserted. That is, the cross-shaped member 11G is inserted into the hole S1h of the first installation stand S1. This allows the cross-shaped member 11G to be used as a guide for placing the first leg 11 on the first installation stand S1, for example. This makes it easier to place the first leg 11 on the first installation stand S1. Furthermore, the lower end of the cross-shaped member 11G inserted into the hole S1h does not contact the ground or the first installation base S1. This prevents the weight of the first leg 11 from being applied to the cross-shaped member 11G. This prevents the cross-shaped member 11G from having more strength than necessary. This, for example, can reduce the cost of the cross-shaped member 11G.

[0038] Moreover, during transportation of the first offshore wind turbine jacket structure 10, the first horizontal member H1 is located on the opposite side of the second horizontal member H2 across the tube axis of the first leg 11. That is, the first leg 11 is sandwiched between the first horizontal member H1 and the second horizontal member H2. The lower surfaces of the first horizontal member H1 and the second horizontal member H2 abut against the upper surfaces of the first transporting carriage D1 and the second transporting carriage D2. This allows, for example, the first installation stand S1 and the first leg 11 arranged on the first installation stand S1 to be lifted by lifting the first horizontal member H1 and the second horizontal member H2 with the first transporting carriage D1 and the second transporting carriage D2. Therefore, by providing the first horizontal member H1 and the second horizontal member H2, it is possible to easily lift the first installation stand S1 and the first leg 11.

[0039] In addition, each of the first horizontal member H1 and the second horizontal member H2 is removably pin-joined to the first installation stand S1. This prevents the first horizontal member H1 and the second horizontal member H2 from being attached to the first installation stand S1 when the first installation stand S1 is used as a construction stand, thereby making it possible to reduce the size of the first installation stand S1. In addition, compared to a case in which the first horizontal member H1 and the second horizontal member H2 are joined to the first installation stand S1 by welding or the like in a state in which they cannot move relative to each other, for example, when the postures of the first transporting cart D1 and the second transporting cart D2 change depending on the shape of the road surface on which the first transporting cart D1 and the second transporting cart D2 run, it is possible to more flexibly respond to the change. In addition, when the first installation stand S1 is used as a transport stand, by attaching the first horizontal member H1 and the second horizontal member H2, the first installation stand S1 can be easily lifted by the first transport cart D1 and the second transport cart D2. Furthermore, the position where the first horizontal member H1 and the first installation stand S1 are pin-joined is symmetrical with the position where the second horizontal member H2 and the first installation stand S1 are pin-joined across the first leg 11. This allows the first leg 11 to be transported in a state where it is stably supported by the first transporting carriage D1 and the second transporting carriage D2.

[0040] Moreover, according to the transportation method of the first offshore wind turbine jacket structure 10 according to this embodiment, the first leg 11 is placed on each of the first transport carriage D1 and the second transport carriage D2. At this time, the first leg 11 is sandwiched between the first transport carriage D1 and the second transport carriage D2. That is, when the first offshore wind turbine jacket structure 10 is transported, the first leg 11 is positioned between the first transport carriage D1 and the second transport carriage D2. This allows the first offshore wind turbine jacket structure 10 to be stably transported by the multiple transport carriages D.

[0041] Second embodiment Next, an offshore wind turbine jacket structure system 1 according to a second embodiment of the present disclosure will be described with reference to Figs. FIG. 9 is a perspective view of an offshore wind turbine jacket structure system 1 according to the second embodiment. FIG. 10 is an enlarged view of part IX in FIG. FIG. 11 is a view taken along the X direction of FIG. FIG. 12 is an enlarged view of a portion XI in FIG. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted, with only the differences being described.

[0042] As shown in Fig. 9, the offshore wind turbine jacket structure system 1 according to this embodiment includes a first offshore wind turbine jacket structure 10, a second offshore wind turbine jacket structure 20, and a third offshore wind turbine jacket structure 30. These offshore wind turbine jacket structures have different structures. That is, these offshore wind turbine jacket structures differ from each other in, for example, their heights and the manner of connection with the steel pipe piles. The structures of these offshore wind turbine jacket structures will be specifically described below.

[0043] The first offshore wind turbine jacket structure 10 is the same as that in the above-mentioned first embodiment, and therefore a description thereof will be omitted. In the second embodiment, the steel pipe pile to which the first leg 11 is connected is referred to as a first steel pipe pile (not shown). That is, in the second embodiment, the first offshore wind turbine jacket structure 10 includes the first leg 11 that is inserted into the first steel pipe pile.

[0044] The second offshore wind turbine jacket structure 20 has a similar configuration to the first offshore wind turbine jacket structure 10, but differs from the first offshore wind turbine jacket structure 10 in that the second offshore wind turbine jacket structure 20 is taller than the first offshore wind turbine jacket structure 10, as shown in Fig. 9. In the second embodiment, the leg provided in the second offshore wind turbine jacket structure 20 is referred to as the second leg 21. Also, the steel pipe pile to which the second leg 21 is connected is referred to as the second steel pipe pile (not shown). That is, in the second embodiment, the second offshore wind turbine jacket structure 20 includes the second leg 21 that is inserted into the second steel pipe pile.

[0045] The third offshore wind turbine jacket structure 30 differs from the first offshore wind turbine jacket structure 10 and the second offshore wind turbine jacket structure 20 in that the third offshore wind turbine jacket structure 30 further includes a connection member 32 in addition to the components of the first offshore wind turbine jacket structure 10 and the second offshore wind turbine jacket structure 20. In the second embodiment, the leg included in the third offshore wind turbine jacket structure 30 is referred to as a third leg 31. The third leg 31 is connected to a third steel pipe pile and a fourth steel pipe pile (both not shown) via the connection member 32. That is, in the second embodiment, the third offshore wind turbine jacket structure 30 includes the third leg 31 connected to the third steel pipe pile and the fourth steel pipe pile, and the connection member 32 connecting the third steel pipe pile and the fourth steel pipe pile to the third leg 31. The connection member 32 will be described in detail below.

[0046] The connection member 32 is provided at the lower end of the third leg 31. This enables the connection member 32 to connect the third leg 31 to the third steel pipe pile and the fourth steel pipe pile. As shown in FIG. 12, the connection member 32 includes a third sheath tube 32a, a fourth sheath tube 32b, a connection plate 32c, and a reinforcing member 32d. The third sheath pipe 32a is a cylindrical member extending in the vertical direction. The third steel pipe pile is inserted into the third sheath pipe 32a. After the third steel pipe pile is inserted into the third sheath pipe 32a, the third sheath pipe 32a and the third steel pipe pile are fixed together by, for example, grout. The fourth sheath pipe 32b is a cylindrical member extending in the up-down direction. The fourth steel pipe pile is inserted into the fourth sheath pipe 32b. After the fourth steel pipe pile is inserted into the fourth sheath pipe 32b, the fourth sheath pipe 32b and the fourth steel pipe pile are fixed together by, for example, grout.

[0047] Here, in the third offshore wind turbine jacket structure 30, the third leg 31 is connected to the third and fourth steel pipe piles as follows. That is, first, the fourth sheath 32b is positioned above the fourth steel pipe pile that has been driven into the seabed beforehand, and the third offshore wind turbine jacket structure 30 is moved downward to insert the fourth steel pipe pile into the fourth sheath 32b, and the fourth sheath 32b and the fourth steel pipe pile are fixed by grout. That is, the fourth steel pipe pile is a so-called pre-driven pile, and the fourth sheath 32b corresponds to the pre-driven pile. Thereafter, the third steel pipe pile is inserted into the third sheath 32a from above, and the third steel pipe pile is driven into the seabed in that state. After the driving of the third steel pipe pile is completed, the third sheath 32a and the third steel pipe pile are fixed by grout. That is, the third steel pipe pile is a so-called post-driven pile, and the third sheath 32a corresponds to the post-driven pile. In order to facilitate the above-mentioned operations, i.e., connecting the third sheath pipe 32a to the third steel pipe pile and connecting the fourth sheath pipe 32b to the fourth steel pipe pile, it is preferable that a third enlarged diameter portion 32ae and a fourth enlarged diameter portion 32be are formed at the upper end of the third sheath pipe 32a and the lower end of the fourth sheath pipe 32b, respectively.

[0048] The connecting plate 32c is a plate-shaped member that connects the lower end of the third leg 31 to the third sheath tube 32a and the fourth sheath tube 32b. As shown in Fig. 12, the connecting plate 32c is provided on the upper and lower sides of the third sheath tube 32a and the fourth sheath tube 32b. The reinforcing member 32d is a plate-like member that reinforces the connection between the lower end of the third leg 31 and the third sheath tube 32a and the fourth sheath tube 32b by the connecting plate 32c. The reinforcing member 32d is provided between the third leg 31 and the third sheath tube 32a and the fourth sheath tube 32b, and between the third sheath tube 32a and the fourth sheath tube 32b. The reinforcing member 32d is joined to the connecting plate 32c, the third sheath tube 32a, and the fourth sheath tube 32b, respectively, by welding, for example. In this way, the reinforcing member 32d reinforces the structure of the connecting member 32.

[0049] (Manufacturing and transportation of jacket structure for offshore wind turbines) The second offshore wind turbine jacket structure 20 and the third offshore wind turbine jacket structure 30 are fabricated in a yard (factory) on land, similar to the first offshore wind turbine jacket structure 10 described in the first embodiment, and then transported to an offshore installation site and arranged on the sea. In addition, the second offshore wind turbine jacket structure 20 and the third offshore wind turbine jacket structure 30 are transported on land in accordance with each process during fabrication.

[0050] Hereinafter, the manner in which the second offshore wind turbine jacket structure 20 and the third offshore wind turbine jacket structure 30 are manufactured and transported will be described. The aspects of the first offshore wind turbine jacket structure 10 during production and transportation are the same as those described in the first embodiment, and therefore will not be described again. In the second embodiment, during transportation of the first offshore wind turbine jacket structure 10, the first installation stand S1 is engaged with each of the two first transport carriages D1 and is sandwiched between the two first transport carriages D1.

[0051] (Aspects of the second offshore wind turbine jacket structure during production and transportation) When the second offshore wind turbine jacket structure 20 is manufactured, each of the multiple second legs 21 is mounted on the second installation stand S2. The transportation of the second offshore wind turbine jacket structure 20 being manufactured is performed, for example, when the second offshore wind turbine jacket structure 20 is moved straight, by simultaneously moving each of the second installation stands S2 on which the second legs 21 are mounted at the same speed in the same direction by the second transport carriage D2. Alternatively, when the traveling direction of the second offshore wind turbine jacket structure 20 is turned, the speed of each of the second transport carriages D2 is appropriately changed. The second transport carriage D2 has a configuration similar to that of the first transport carriage D1 of the first embodiment. When the second offshore wind turbine jacket structure 20 is transported, the second leg 21 is installed on the second installation stand S2. At this time, the second installation stand S2 is supported by one second transport carriage D2. This makes it possible to move the second installation stand S2 and the second leg 21 by the second transport carriage D2.

[0052] (Second installation stand) In the second offshore wind turbine jacket structure 20, the work of connecting the second legs 21 to each other with the braces 12 is performed, for example, with the second legs 21 leaning against a jig (not shown). At this time, the lower part of the second leg 21 is placed on a second installation stand S2 placed on the ground. As shown in FIGS. 10 and 11, the second installation stand S2 includes a second top plate S2a and a second leg portion S2b. The second top plate S2a is a square or rectangular member on which the lower end of the second leg 21 is placed. At this time, two sides of the second top plate S2a are arranged along the traveling direction of the second transporting carriage D2. The second top plate S2a is supported by the second legs S2b. Here, the second leg 21 has a cross-shaped member 11G at its lower end, similar to the first leg 11 of the first offshore wind turbine jacket structure 10. For this reason, it is preferable that the top plate has a configuration (hole S2h) similar to the hole S1h of the first installation stand S1. Also, it is preferable that the thickness of the second top plate S2a is equal to or greater than the height of the cross-shaped member 11G provided at the lower end of the second leg 21.

[0053] The second leg S2b is a portion of the second installation stand S2 that comes into contact with the ground. The second leg S2b is provided on both ends of the second tabletop S2a. Here, as described above, two sides of the square or rectangular second tabletop S2a are arranged along the traveling direction of the second transporting carriage D2. In the second embodiment, the second leg S2b is provided in pair on both ends of the second tabletop S2a arranged as described above in a direction perpendicular to the traveling direction of the second transporting carriage D2.

[0054] As described above, each of the pair of second legs S2b includes a support portion S2b1 and a support reinforcement portion S2b2. Only one of the pair of second legs S2b will be described below, and the other will not be described since it has the same configuration as the other. The support pillars S2b1 extend in a direction perpendicular to the ground. The second legs S2b are provided at the corners of the square or rectangular second top board S2a, as shown in Figs. 10 and 11, for example. In other words, two support pillars S2b1 are provided along the traveling direction of the second transporting carriage D2. Alternatively, without being limited thereto, three or more support pillars S2b1 may be provided along the traveling direction of the second transporting carriage D2. The support pillar reinforcement portion S2b2 is provided to reinforce the support pillar portion S2b1. That is, the support pillar reinforcement portion S2b2 connects the lower ends of the support pillar portions S2b1 provided as described above. The support pillar reinforcement portion S2b2 is provided so as to be in contact with the ground. This prevents the support pillar portion S2b1 from being deformed by the weight of the second leg 21, for example. In addition, the support pillar reinforcement portion S2b2 in contact with the ground increases the surface area of ​​the second leg portion S2b in contact with the ground compared to the case where only the support pillar portion S2b1 is in contact. This reduces the load on the ground caused by the weight of the second leg 21.

[0055] The second installation stand S2 having the above-mentioned configuration is supported by one second transporting carriage D2. That is, when the second installation stand S2 on which the second leg 21 is installed is lifted by the second transporting carriage D2, the second transporting carriage D2 enters under the second top plate S2a from between the pair of second legs S2b. The second transporting carriage D2 lifts the second installation stand S2 and the second leg 21 by moving the loading platform Dc upward in a state in which the second transporting carriage D2 is positioned under the second top plate S2a. This makes it possible for the second transporting carriage D2 to transport the second leg 21 through the second offshore wind turbine jacket structure 20. That is, when transporting the second offshore wind turbine jacket structure 20, one second transporting carriage D2 is sandwiched between the second legs S2b provided at both ends of the second installation stand S2.

[0056] (Third offshore wind turbine jacket structure during manufacturing and transportation) As shown in FIG. 12, when the third offshore wind turbine jacket structure 30 is manufactured, each of the multiple third legs 31 is supported by the third installation stand S3. More specifically, the third legs 31 are supported by the third installation stand S3 by installing the third sheath pipe 32a of the connection member 32 provided at the lower end of the third leg 31 on the third installation stand S3. The transportation of the third offshore wind turbine jacket structure 30 being manufactured is performed, for example, when the third offshore wind turbine jacket structure 30 is moved straight, by moving each of the third installation stands S3 on which the third sheath pipe 32a is installed, in the same direction at the same speed at the same time by the third transport carriage D3. Alternatively, when the traveling direction of the third offshore wind turbine jacket structure 30 is turned, the speed of each of the third transport carriages D3 is appropriately changed. The third transport carriage D3 has a configuration similar to that of the first transport carriage D1 of the first embodiment. When the third offshore wind turbine jacket structure 30 is transported, the connection member 32 is supported by the third installation stand S3. At this time, the third installation stand S3 is supported by one third transport carriage D3. This makes it possible to move the third installation stand S3 and the third leg 31 by the third transport carriage D3.

[0057] (3rd installation stand) In the third offshore wind turbine jacket structure 30, the work of connecting the third legs 31 to each other with the braces 12 is performed in a state in which the third legs 31 are leaned against a jig (not shown). At this time, the third legs 31 are supported by a third installation stand S3 placed on the ground. As shown in FIG. 12, the third installation stand S3 includes a third tabletop S3a and a third leg portion S3b (leg). The third top plate S3a is a square or rectangular member on which the lower end of the third sheath tube 32a is placed. At this time, two sides of the third top plate S3a are arranged along the traveling direction of the third transporting carriage D3. The third top plate S3a is supported by the third legs S3b. Here, as described above, the third sheath tube 32a has the third enlarged diameter portion 32ae at the upper end, but does not have an enlarged diameter portion at the lower end. The fourth enlarged diameter portion 32be provided on the fourth sheath tube 32b has a lower strength than the lower end of the third sheath tube 32a. If the fourth sheath tube 32b having the fourth enlarged diameter portion 32be at the lower end is placed on the third top plate S3a, the burden on the fourth enlarged diameter portion 32be increases. For this reason, as shown in FIG. 12, it is preferable that the fourth enlarged diameter portion 32be is not placed directly on the third installation table S3. In other words, it is preferable that the third sheath tube 32a is placed on the third top plate S3a. In addition, the third sheath tube 32a is a cylindrical member and does not have a cross-shaped member 11G at the lower end. Therefore, the third top plate S3a does not need to have a hole. In addition, the thickness of the third top plate S3a may be determined arbitrarily as long as the strength capable of withstanding the weight applied from the third sheath tube 32a is ensured.

[0058] The third leg S3b is a portion that comes into contact with the ground. The third leg S3b is provided on both ends of the third tabletop S3a. Here, as described above, two sides of the square or rectangular third tabletop S3a are arranged along the traveling direction of the third transporting carriage D3. In the second embodiment, the third leg S3b is provided in pair on both ends of the third tabletop S3a arranged as described above in a direction perpendicular to the traveling direction of the third transporting carriage D3. The third leg S3b has a similar configuration to the second leg S2b, that is, each of the pair of third legs S3b as described above includes a support portion S2b1 and a support reinforcement portion S2b2. The third installation stand S3 having the above-mentioned configuration is supported by one third transport vehicle D3. That is, when the third installation stand S3 on which the third sheath tube 32a is installed is lifted by the third transport vehicle D3, the third transport vehicle D3 enters under the third top plate S3a from between the pair of third leg parts S3b. The third transport vehicle D3 lifts the third installation stand S3 and the third leg 31 by moving the loading platform Dc upward in a state in which the third transport vehicle D3 is positioned under the third top plate S3a. This makes it possible for the third transport vehicle D3 to transport the third leg 31 through the third offshore wind turbine jacket structure 30 via the third sheath tube 32a. That is, when transporting the third offshore wind turbine jacket structure 30, one third transport vehicle D3 is sandwiched between the third leg parts S3b provided at both ends of the third installation stand S3.

[0059] As described above, according to the offshore wind turbine jacket structure system 1 according to the second embodiment, the first installation stand S1 on which the first leg 11 of the first offshore wind turbine jacket structure 10 is installed is engaged with each of the two first transport carriages D1, and is sandwiched between the two first transport carriages D1. The second installation stand S2 on which the second leg 21 of the second offshore wind turbine jacket structure 20 is installed is supported by one second transport carriage D2. The third installation stand S3 on which the connection member 32 of the third offshore wind turbine jacket structure 30 is installed is supported by one third transport carriage D3. In this way, by providing an individual installation stand for each of the multiple types of offshore wind turbine jacket structures included in the offshore wind turbine jacket structure system 1, it is possible to provide an installation stand more suitable for each offshore wind turbine jacket structure. Therefore, it is possible to more efficiently manufacture and transport the offshore wind turbine jacket structure. Further, a third sheath pipe 32a provided with the connection member 32 is installed on the third installation stand S3. Third legs S3b (legs) are provided on both ends of the third installation stand S3, and one third transport vehicle D3 is sandwiched between the third legs S3b provided on both ends. This makes it possible to easily transport the third offshore wind turbine jacket structure 30 provided with the connection member 32.

[0060] The technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure. For example, the second top plate S2a of the second placement stand S2 may be provided with configurations corresponding to the contact members S1d and the claw portions S1c of the first placement stand S1. Furthermore, a configuration equivalent to the contact member S1d of the first placement stand S1 may be provided on the third top plate S3a of the third placement stand S3.

[0061] In addition, within the scope of the present disclosure, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0062] 1 Jacket structure system for offshore wind turbines 10. Jacket structure for the first offshore wind turbine 11 First leg 11C Lid member 11G Cross-shaped member 12 Braces 13 Transition Piece 20. Jacket structure for the second offshore wind turbine 21 2nd Leg 30. Jacket structure for the third offshore wind turbine 31 Third Leg 32 Connection parts 32a Third sheath 32b 4th sheath 32c Connection board 32d Reinforcement member D Transport cart D1 First transport cart D2 Second transport cart D3 Third transport cart H Horizontal material H1 1st horizontal member H2 2nd horizontal member S1 1st installation stand S1a 1st leg S1a1 joint S1b 1st beam part S1c claw part S1d Contact member S2 2nd installation stand S2a 2nd top plate S2b 2nd leg S2b1 Support column S2b2 Pillar reinforcement S3 3rd installation stand S3a 3rd Top S3b 3rd leg

Claims

1. An offshore wind turbine jacket structure system comprising an offshore wind turbine jacket structure having a plurality of legs, During transportation of the offshore wind turbine jacket structure, A first leg included in the plurality of legs is placed on each of a first transporting carriage and a second transporting carriage, The first leg is sandwiched between the first transport vehicle and the second transport vehicle. A jacket structure system for an offshore wind turbine.

2. The lower portion of the first leg is installed on a mounting base that is placed on the ground, the installation stand is engaged with each of the first transporting carriage and the second transporting carriage, and is sandwiched between the first transporting carriage and the second transporting carriage; The jacket structure system for an offshore wind turbine according to claim 1 .

3. The installation base includes a claw portion, The first leg further includes a cover member provided on the lower portion and having a diameter larger than a diameter of the lower portion, The cover member prevents grout from flowing into the first leg, The claw portion engages with the cover member to prevent the first leg from lifting up from the installation base. The jacket structure system for an offshore wind turbine according to claim 2 .

4. The installation base further includes an abutment member, The abutment member abuts against the lid member to determine a horizontal position of the lower portion relative to the installation base. The jacket structure system for an offshore wind turbine according to claim 3 .

5. The lower end of the leg includes a cross-shaped member that is cross-shaped when viewed along the axial direction of the lower end, the installation base has a hole into which the cross-shaped member is inserted, The lower end of the cross-shaped member inserted into the hole does not contact the ground or the installation base. The jacket structure system for an offshore wind turbine according to any one of claims 2 to 4.

6. A first horizontal member and a second horizontal member are provided on the upper portion of the installation base, During transportation of the offshore wind turbine jacket structure, The first horizontal member is located on the opposite side of the second horizontal member across the pipe axis of the first leg, The lower surfaces of the first horizontal member and the second horizontal member abut against the upper surfaces of the first transporting carriage and the second transporting carriage. The jacket structure system for an offshore wind turbine according to claim 2 .

7. Each of the first horizontal member and the second horizontal member is removably connected to the installation base by a pin, The position where the first horizontal member and the installation base are pin-joined is symmetrical with the position where the second horizontal member and the installation base are pin-joined across the first leg. The jacket structure system for an offshore wind turbine according to claim 6.

8. a first offshore wind turbine jacket structure including a first leg inserted into a first steel pipe pile; A second offshore wind turbine jacket structure including a second leg inserted into the second steel pipe pile; and A third offshore wind turbine jacket structure including a third leg connected to a third steel pipe pile and a fourth steel pipe pile, and a connection member connecting the third steel pipe pile and the fourth steel pipe pile to the third leg; A jacket structure system for an offshore wind turbine comprising: When the first offshore wind turbine jacket structure is transported, the first leg is installed on a first installation stand, When the second offshore wind turbine jacket structure is transported, the second leg is installed on a second installation stand, When the third offshore wind turbine jacket structure is transported, the connection member is installed on a third installation stand, the first installation table is engaged with each of the two first transporting carriages and is sandwiched between the two first transporting carriages; The second installation table is supported by one second transport carriage, The third installation table is supported by one third transport carriage, The connection member includes a third sheath pipe into which the third steel pipe pile is inserted, The third installation stand has the third sheath pipe installed thereon, The third mounting base has legs at both ends, The one third transport vehicle is sandwiched between the legs provided at both ends. A jacket structure system for an offshore wind turbine.

9. A transportation method for an offshore wind turbine jacket structure having a plurality of legs, comprising: A first leg included in the plurality of legs is placed on each of a first transporting carriage and a second transporting carriage, A first leg included in the plurality of legs is sandwiched between the first transporting vehicle and the second transporting vehicle. A method for transporting a jacket structure for an offshore wind turbine, comprising:

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