Jacket structure system

Abstract

To provide a jacket structure system allowing a jacket structure to be safely transported on a transport cart.SOLUTION: A jacket structure system is provided with: a jacket structure having a plurality of leg; a transport cart; and an installation base, wherein a first leg included in the plurality of legs is installed on the installation base installed on the ground, and the installation base is transported on the transport cart in a state the first leg is loaded thereon.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] Conventionally, a jacket structure for an offshore wind turbine has been transported by a carrier vehicle. Patent Document 1 discloses providing a leg stabbing in a jacket structure for an offshore wind turbine on a support member and transporting a lower jacket using a dolly. Patent Document 2 discloses transporting a transition piece of a monopile foundation by a multi-axle vehicle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, Patent Document 1 does not disclose how to use a dolly to transport a lower jacket. Further, Patent Document 2 does not assume transporting a jacket structure by a multi-axle vehicle.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a jacket structure system for an offshore wind turbine capable of stably transporting a jacket structure for an offshore wind turbine by a carrier vehicle, and a method for transporting a jacket structure for an offshore wind turbine.

Means for Solving the Problems

[0006] <1>The jacket structure system for an offshore wind turbine according to Embodiment 1 of the present disclosure is a jacket structure system for an offshore wind turbine having a plurality of legs, wherein, when the jacket structure for the offshore wind turbine is being transported, a first leg included in the plurality of legs is placed on each of a first transport carriage and a second transport carriage, and the first leg is sandwiched between the first transport carriage and the second transport carriage.

Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a jacket structure system for an offshore wind turbine that can stably transport a jacket structure for an offshore wind turbine using a transport carriage, and a method for transporting a jacket structure for an offshore wind turbine.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0009] (First Embodiment) Hereinafter, with reference to the drawings, a jacket structure system for an offshore wind turbine according to an embodiment of the present disclosure will be described. 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 in the middle 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 ground. The jacket structure for an offshore wind turbine supports an offshore wind turbine (not shown) offshore. Note that when the jacket structure system for an offshore wind turbine includes a plurality of jacket structures for an offshore wind turbine, the structures or shapes of the respective plurality of jacket structures for an offshore wind turbine may all be the same or may be different from each other.

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

[0011] (Structure of the First Offshore Wind Turbine Jacket Structure 10) As shown in FIG. 1, the first offshore wind turbine jacket structure 10 includes a first leg 11, braces 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 vertical direction. In this embodiment, the first leg 11 is a cylindrical member. In other words, the first leg 11 is a hollow member. The lower part of the first leg 11 is connected to the upper end of a steel pipe pile (not shown). The upper end of the first leg 11 is connected to the transition piece 13. At this time, the first leg 11 may be appropriately bent or curved according to the dimensions of the transition piece 13 connected to the upper end and the distance between the steel pipe piles connected to the lower end. 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 connection, the first leg 11 and the steel pipe pile are fixed by filling grout between the outer peripheral surface of the first leg 11 and the inner peripheral surface of the steel pipe pile. Here, when grout flows into the inside of the first leg 11, it causes an extra need for grout to fix the first leg 11 and the steel pipe pile. To suppress this, a lid member 11C (see FIG. 3) is provided at the lower part of the first leg 11 to block the opening of the cylindrical first leg 11 and suppress the inflow of grout into the inside of the first leg 11. Thereby, the amount of grout required to fix the first leg 11 and the steel pipe pile can be suppressed.

[0013] In this embodiment, the diameter of the lid member 11C is larger than the diameter of the lower part of the first leg 11. As a result, a flange-like portion is formed at the lower part of the first leg 11 by the lid member 11C. Hereinafter, this portion is referred to as the flange portion 11f. The claw portion S1c of the first installation base S1 described later is engaged with the flange portion 11f. This can prevent the first leg 11 from rising from the first installation base S1 (details will be described later).

[0014] When inserting the first leg 11 into the inside of the steel pipe pile or installing the lower part of the first leg 11 on the first installation base S1, it is necessary to appropriately align the lower end of the first leg 11. In order 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 for guiding the lower end of the first leg 11 to the upper end of the steel pipe pile or the hole S1h (see FIG. 6) of the first installation base 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 arranging a plurality of plate-like members in a cross shape combination.

[0015] The cross-shaped member 11G preferably has a shape having a vertex 11Gt protruding downward at the center in the radial direction of the first leg 11, as shown in FIGS. 3 and 4, for example. As a result, for example, when aligning the first leg 11 with the steel pipe pile, after the vertex 11Gt of the cross-shaped member 11G is inserted into the inside of the steel pipe pile, when the first leg 11 moves downward, the cross-shaped member 11G continues to contact the steel pipe pile, 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 cruciform member 11G, each of the plate-like members forming the cruciform member 11G is preferably, for example, trapezoidal or triangular. Further, in order to make it easier to align the first leg 11 with the steel pipe pile or the first installation base S1 by the cruciform member 11G, the dimension of the cruciform member 11G in the direction perpendicular to the axial direction of the lower end of the first leg 11 is preferably, for example, about the same as the diameter of the lid member 11C. Alternatively, the dimension of the cruciform member 11G in the direction perpendicular to the axial direction of the lower end of the first leg 11 may be larger than the diameter of the lid member 11C as shown in FIG. 6, as long as the cruciform member 11G can be accommodated inside the steel pipe pile.

[0016] The brace 12 connects the four first legs 11 to each other along the circumferential direction of the first offshore wind turbine jacket structure 10. The brace 12 is joined to the first leg 11 by welding, for example. By this, the brace 12 reinforces the structure composed of the four first legs 11. The transition piece 13 is the part of the first offshore wind turbine jacket structure 10 to which the offshore wind turbine is connected. Specifically, the lower end of the offshore wind turbine tower is connected to the transition piece 13. Further, the transition piece 13 is supported by the four legs described above. With the above-described respective configurations, the first offshore wind turbine jacket structure 10 supports the offshore wind turbine.

[0017] (Aspects during manufacturing and transportation of the first offshore wind turbine jacket structure) The first offshore wind turbine jacket structure 10 according to the present embodiment is manufactured by assembling the above-described respective configurations at a land yard (factory), and then transported to an offshore installation location. Then, it is installed offshore by being connected to a steel pipe pile previously driven into the seabed ground. Further, the first offshore wind turbine jacket structure 10 is transported on the ground by a transport carriage D as shown in FIGS. 1 and 2 in accordance with each process during manufacturing.

[0018] Hereinafter, aspects during manufacturing and transportation of the first offshore wind turbine jacket structure 10 according to the present embodiment will be described. That is, for example, when manufacturing the first offshore wind turbine jacket structure 10, each of the plurality of first legs 11 is installed on the first installation base S1 as shown in FIG. 3 or FIG. 4. The transportation of the first offshore wind turbine jacket structure 10 during manufacturing is carried out by moving the first installation base S1 on which the first leg 11 is installed by a transport cart D as shown in FIGS. 1 and 2. At this time, the first installation base S1 and the transport cart D are connected by a horizontal member H (see FIG. 7). This enables the first installation base S1 and the first leg 11 to be moved by the transport cart D.

[0019] (First installation base) In the first offshore wind turbine jacket structure 10, the operation of connecting the first legs 11 with braces 12 is carried out with the first legs 11 leaned against a jig (not shown). At this time, the lower part of the first leg 11 is installed on the first installation base S1 (installation base) arranged on the ground. As shown in FIG. 3 or FIG. 4, the first installation base S1 includes a first leg portion S1a, a first beam portion S1b, a claw portion S1c, and a contact member S1d. The first leg portion S1a is the part in contact with the ground. The first leg portion S1a extends, for example, horizontally along the ground. At this time, the first leg portion S1a extends, for example, along the traveling direction when the first offshore wind turbine jacket structure 10 is transported. This enables the transport cart D to be arranged along the longitudinal direction of the first leg portion S1a. For example, known H-shaped steel or I-shaped steel is used for the first leg portion S1a. At this time, the first leg portion S1a is arranged such that, for example, the web part is perpendicular to the ground and the flange part is in contact with the ground. In the first installation base S1, two first leg portions S1a are provided substantially in parallel. In this embodiment, substantially in parallel means that the relative angle is 5° or less. This enables the lower part of the first leg 11 to be positioned between the two first leg portions S1a when the first leg 11 is installed on the first installation base S1. As shown in FIGS. 3 to 6, each of the two first leg portions S1a has a joint portion S1a1 to which a horizontal member H to be described later can be pin-jointed. The joint portion S1a1 is provided at the upper part of each of the first leg portions S1a. The joint portion S1a1 is provided at two positions respectively for the two first leg portions S1a.

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

[0021] As described above, when the first leg 11 is installed on the first installation base S1, the lower part of the first leg 11 is positioned between the two first leg portions S1a and between the two first beam portions S1b. In other words, the first installation base S1 has a hole S1h formed by the two first leg portions S1a and the two first beam portions S1b, and the first leg 11 is installed on the first installation base 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, a cross-shaped member 11G is inserted into the hole S1h. By this, the cross-shaped member 11G functions as a guide when the first leg 11 is installed on the first installation base S1. In addition, in the present embodiment, the lower end of the cross-shaped member 11G inserted into the hole S1h does not contact the ground and the first installation base S1. That is, in the present embodiment, as shown in FIG. 4, the height h1 of the first leg portion S1a and the first beam portion S1b is equal to or greater than the height h2 of the cross-shaped member 11G. Further, 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 can 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 base S1, the lid member 11C of the first leg 11 abuts on the upper surfaces of the first leg portion S1a and the first beam portion S1b of the first installation base S1 as shown in FIGS. 3 to 6. Thereby, the first leg 11 is installed on the first installation base S1. At this time, in order to evenly apply the load of the first leg 11 by making the contact areas of the lid member 11C of the first leg 11 with respect to the two first leg portions S1a and the two first beam portions S1b equal, the first leg portion S1a and the first beam portion S1b are preferably at the same height as each other. Further, the hole S1h formed by the two first leg portions S1a and the two first beam portions S1b is preferably square, and the length of one side is smaller than the diameter of the lid member 11C and is square enough to accommodate the cross-shaped member 11G. Further, the length of one side of the hole S1h is preferably such that the cross-shaped member 11G can be accommodated without interfering with the hole S1h. That is, for example, even when the dimension in the direction perpendicular to the axial direction of the lower end of the first leg 11 in the cross-shaped member 11G is larger than the diameter of the lid member 11C, as shown in FIG. 6, the plates forming the cross-shaped member 11G in plan view are arranged along the diagonal lines of the hole S1h, respectively, so that the length is preferably such that the cross-shaped member 11G can be accommodated.

[0023] The claw part S1c is a plate-shaped member attached to the first leg part S1a or the first beam part S1b by welding or the like. The claw part S1c stands on the upper surface of the first leg part S1a or the first beam part S1b, and the edge of the plate surface is joined to the first leg part S1a or the first beam part S1b. By this, for example, the welding surface of the claw part S1c to the first leg part S1a or the first beam part S1b can be made smaller, and the workability of welding can be improved. As shown in FIG. 5, the claw part S1c has a notch S1c1. When the notch S1c1 abuts against the lid member 11C of the first leg 11, the claw part S1c engages with the lid member 11C of the first leg 11. By this, the claw part S1c prevents the first leg 11 installed on the first installation base S1 from lifting off the first installation base S1.

[0024] As shown in FIG. 5, the notch S1c1 is provided by notching the end of the portion where the claw part S1c and the first leg part S1a or the first beam part S1b abut. The dimension d1 of the notch S1c1 in the direction along the upper surface of the first leg part S1a or the first beam part S1b is such that it can engage with the flange part 11f formed by the lid member 11C at the lower part of the first leg 11. The dimension d2 of the notch S1c1 in the direction orthogonal to the upper surface of the first leg part S1a or the first beam part S1b is equal to the thickness of the lid member 11C. Here, as described above, a flange part 11f is formed by a lid member 11C having a larger diameter than the lower part of the first leg 11 at the lower part of the first leg 11. Therefore, as shown in FIG. 3, after the lower part of the first leg 11 is inserted into the hole S1h of the first installation base S1, as shown in FIG. 4, when the claw part S1c is attached to the upper surfaces of the first leg part S1a and the first beam part S1b, the notch S1c1 of the claw part S1c engages with the lid member 11C. Thereby, the claw part S1c can prevent the first leg 11 installed on the first installation base S1 from lifting off the first installation base S1. The claw portions S1c are equally provided on, for example, each of the two first leg portions S1a and the two first beam portions S1b. That is, as shown in FIG. 6, for example, the claw portions S1c are provided at two locations near both ends in the longitudinal direction of the contact surface A between the lid member 11C of the first leg 11 and the first leg portion S1a or the first beam portion S1b. In this way, it is preferable to ensure that the first leg 11 is prevented from lifting off the first installation base S1 by the claw portions S1c.

[0025] As shown in FIG. 6, the contact member S1d contacts the lid member 11C to determine the horizontal position of the lower part of the first leg 11 with respect to the first installation base S1. In the present embodiment, the contact member S1d is, for example, a plate-like member attached to each of the first leg portion S1a and the first beam portion S1b by welding or the like. Hereinafter, the contact member S1d provided on one of the two first leg portions S1a will be described, but the same applies to the other first leg portion S1a and the two first beam portions S1b.

[0026] The contact member S1d is provided at a portion corresponding to the middle of one side of the hole S1h in one of the first leg portions S1a. The contact member S1d includes, for example, a contact plate S1d1 that contacts the lid member 11C and a reinforcing plate S1d2 that reinforces the contact plate S1d1. The contact plate S1d1 is erected on the upper surface of the first leg portion S1a, and the edge of the plate surface is joined to the first leg portion S1a. Then, on the upper surface of the first leg portion S1a, two contact plates S1d1 are arranged at intervals. The two contact plates S1d1 have the same shape as each other. Among the edges of the contact 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 goes from bottom to top, as shown in FIG. 3, for example. In this way, when the first leg 11 is installed on the first installation base S1, the lid member 11C that contacts the inclined portion S1ds can be guided toward the center side of the hole S1h as it moves downward. As shown in FIGS. 3 and 6, the reinforcing plate S1d2 is provided to connect the edges along the vertical direction of the first leg 11 in the two contact plates S1d1, that is, the edges facing horizontally and not facing the hole S1h. That is, the reinforcing plate S1d2 is in a state of standing on the upper surface of the first leg portion S1a, and the edge of the plate surface is joined to the upper surface of the first leg portion S1a and the edge not facing the hole S1h among the edges along the vertical direction of the two contact plates S1d1. By this, the reinforcing plate S1d2 suppresses the contact plate S1d1 standing on the upper surface of the first leg portion S1a from falling or deforming due to contact with the lid member 11C or the like. Note that the contact member S1d is not limited to the above-described configuration, and may be, for example, a block-shaped member including a portion corresponding to the inclined portion S1ds.

[0027] (Transport trolley) As shown in FIG. 2, the transport trolley D transports the first offshore windmill jacket structure 10. The transport trolley D includes a loading platform Dc on which an object to be transported can be placed and a plurality of wheels Dt for moving the loading platform Dc. For the transport trolley D, for example, a known dolly is preferably used. Note that the loading platform Dc is movable in the vertical direction. The transport trolley D is arranged on each of the plurality of first legs 11 in the first offshore windmill jacket structure 10. Each of the transport trolleys D arranged on each of the first legs 11 moves in the same direction at the same speed simultaneously, for example, when the first offshore windmill jacket structure 10 is moved straight ahead. Alternatively, when bending the traveling direction of the first offshore windmill jacket structure 10, the speed of each of the transport trolleys D is appropriately changed. By this, the transport trolley D transports the first leg 11 to the first offshore windmill jacket structure 10.

[0028] When the first offshore windmill jacket structure 10 is being transported, the first leg 11 is placed on each of the first transport cart D1 and the second transport cart D2. At this time, the first leg 11 is sandwiched between the first transport cart D1 and the second transport cart D2. That is, one first leg 11 is transported by two transport carts D. In this embodiment, the first transport cart D1 and the second transport cart D2 have the same configuration as each other. Hereinafter, in this embodiment, when the first transport cart D1 and the second transport cart D2 are not distinguished, they are referred to as the transport cart D.

[0029] When the first leg 11 is being transported by the transport cart D, the first leg 11 is transported in a state of being installed on the first installation base S1. In this embodiment, the transport cart D transports the first leg 11 by moving the first installation base S1. In this embodiment, when moving the first installation base S1 by the transport cart D, one first installation base S1 is moved by two transport carts D. That is, the first installation base S1 is locked to each of the first transport cart D1 and the second transport cart D2 and is sandwiched between the first transport cart D1 and the second transport cart D2. At this time, the transport cart D is arranged along the longitudinal direction of the first leg S1a of the first installation base S1. By this, the first installation base S1 can move in the direction in which the first leg S1a extends. In this embodiment, the transport cart D is locked to the first installation base S1 via the horizontal member H described below.

[0030] (Horizontal member) The horizontal member H locks the transport cart D and the first installation base S1. The horizontal member H is attached to the first installation base S1 when the first offshore windmill jacket structure 10 is being transported, that is, when moving the first installation base S1 by the transport cart D. The lower surfaces of the first horizontal member H1 and the second horizontal member H2 abut against the upper surfaces of the first carrier truck D1 and the second carrier truck D2. That is, the carrier truck D is arranged such that the loading platform Dc is positioned below the horizontal member H attached to the first installation base S1, and the loading platform Dc is moved upward to lift the horizontal member H. By this, the carrier truck D lifts the first installation base S1 via the horizontal member H. In this embodiment, locking the carrier truck D and the first installation base S1 means the state in which the first installation base S1 is lifted by the carrier truck D. Further, in this embodiment, placing the first leg 11 on the first carrier truck D1 and the second carrier truck D2 means that the first installation base S1 provided with the first leg 11 is placed on the first carrier truck D1 and the second carrier truck D2.

[0031] When locking the carrier truck D and the first installation base S1, the first horizontal member H1 and the second horizontal member H2 are provided on the upper part of the first installation base S1. The first horizontal member H1 and the second horizontal member H2 have the same configuration as each other. The first horizontal member H1 and the second horizontal member H2 are members extending along the horizontal direction. At this time, the first horizontal member H1 and the second horizontal member H2 extend in directions perpendicular to the direction in which the first leg part S1a extends, respectively. As shown in FIG. 7, each of the first horizontal member H1 and the second horizontal member H2 is removably pinned to the first installation base S1 by a pin Pi. Specifically, as shown in FIG. 7, each of the first horizontal member H1 and the second horizontal member H2 is pinned to each of the joint parts S1a1 provided on the two first leg parts S1a, respectively. At this time, the first horizontal member H1 is arranged to be located on the opposite side of the second horizontal member H2 with the pipe axis of the first leg 11 interposed therebetween. The position where the first horizontal member H1 is pinned to the first installation base S1 is symmetric with the position where the second horizontal member H2 is pinned to the first installation base S1 with the first leg 11 interposed therebetween. By setting such an arrangement, the first installation base S1 can be stably lifted by the carrier truck D.

[0032] (Transportation method of jacket structure for offshore wind turbine) Next, a method for transporting the jacket structure for an offshore wind turbine according to the present embodiment will be described. That is, in the present embodiment, the first jacket structure 10 for an offshore wind turbine is transported by moving a plurality of first legs 11 using the above-described respective components. At this time, the first legs 11 are placed on each of the first transport cart D1 and the second transport cart D2, and the first legs 11 included in the plurality of legs are sandwiched between the first transport cart D1 and the second transport cart D2. This enables each of the plurality of first legs 11 to be stably transported.

[0033] As described above, according to the jacket structure system 1 for an offshore wind turbine according to the present embodiment, when the first jacket structure 10 for an offshore wind turbine is transported, the first leg 11 is placed on each of the first transport cart D1 and the second transport cart D2. Further, the first leg 11 is sandwiched between the first transport cart D1 and the second transport cart D2. That is, when the first jacket structure 10 for an offshore wind turbine is transported, the first leg 11 is positioned between the first transport cart D1 and the second transport cart D2. Thereby, the first jacket structure 10 for an offshore wind turbine can be stably transported by a plurality of transport carts D.

[0034] In addition, the first installation base S1 on which the lower portion of the first leg 11 is installed is locked to each of the first transport cart D1 and the second transport cart D2. Thereby, by moving the first installation base S1 by the first transport cart D1 and the second transport cart D2, the first leg 11 can be moved. Therefore, in addition to functioning as a construction scaffold when manufacturing the first jacket structure 10 for an offshore wind turbine, the first installation base S1 can also function as a transport scaffold when transporting the manufactured first jacket structure 10 for an offshore wind turbine. Further, the first installation base S1 is sandwiched between the first transport cart D1 and the second transport cart D2. Thereby, the first installation base S1 can be stably transported by the first transport cart D1 and the second transport cart D2. Therefore, the first jacket structure 10 for an offshore wind turbine can be stably transported.

[0035] In addition, the lid member 11C suppresses the inflow of grout into the first leg 11. Thereby, when fixing the steel pipe pile and the first leg 11 by the inflow of grout into the first leg 11, it is possible to suppress the need for an excessive amount of grout. In addition, the claw portion S1c engages with the lid member 11C in order to prevent the first leg 11 from lifting off the first installation base S1. Thereby, in addition to causing the lid member 11C to function to suppress the inflow of grout into the first leg 11, it can function to suppress the first leg 11 from lifting off from the state where the first leg 11 is placed on the first installation base S1.

[0036] In addition, the contact member S1d provided on the first installation base S1 contacts the lid member 11C in order to determine the horizontal position of the lower portion of the first leg 11 with respect to the first installation base S1. Thereby, in addition to the two functions described above, the lid member 11C can function to align the first leg 11 with respect to the first installation base S1.

[0037] In addition, the lower end of the first leg 11 is provided with a cross-shaped member 11G, and the first installation base 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 base S1. Thereby, the cross-shaped member 11G can be used, for example, as a guide for arranging the first leg 11 on the first installation base S1. Therefore, it is possible to facilitate the arrangement of the first leg 11 on the first installation base S1. In addition, the lower end of the cross-shaped member 11G inserted into the hole S1h does not contact the ground and the first installation base S1. Thereby, it is possible to prevent the self-weight of the first leg 11 from being applied to the cross-shaped member 11G. Therefore, it is possible to suppress the cross-shaped member 11G from having more strength than necessary. Therefore, for example, the cost of the cross-shaped member 11G can be suppressed.

[0038] Also, when the first jacket structure 10 for an offshore wind turbine is being transported, the first horizontal member H1 is located on the opposite side of the second horizontal member H2 with the pipe axis of the first leg 11 in between. That is, the first leg 11 is sandwiched between the first horizontal member H1 and the second horizontal member H2. And the lower surfaces of the first horizontal member H1 and the second horizontal member H2 abut against the upper surfaces of the first transport cart D1 and the second transport cart D2. Thereby, for example, by lifting the first horizontal member H1 and the second horizontal member H2 with the first transport cart D1 and the second transport cart D2, the first installation base S1 and the first leg 11 arranged on the first installation base S1 can be lifted. Therefore, by providing the first horizontal member H1 and the second horizontal member H2, it is possible to make it easier to lift the first installation base S1 and the first leg 11.

[0039] Also, each of the first horizontal member H1 and the second horizontal member H2 is removably pin - joined to the first installation base S1. Thereby, when the first installation base S1 is used as a construction gantry, by preventing the first horizontal member H1 and the second horizontal member H2 from being attached to the first installation base S1, the size of the first installation base S1 can be suppressed. Also, compared with the case where the first horizontal member H1 and the second horizontal member H2 are joined to the first installation base S1 in a state where they cannot relatively move with respect to each other by welding or the like, for example, when the postures of the first transport cart D1 and the second transport cart D2 change according to the shape of the road surface on which the first transport cart D1 and the second transport cart D2 travel, it is possible to more easily and flexibly respond. Also, when the first installation base S1 is used as a transport gantry, by attaching the first horizontal member H1 and the second horizontal member H2, it is possible to make it easier to lift the first installation base S1 with the first transport cart D1 and the second transport cart D2. Furthermore, the position where the first horizontal member H1 is pin - joined to the first installation base S1 is symmetric with the position where the second horizontal member H2 is pin - joined to the first installation base S1 with the first leg 11 in between. Thereby, the first leg 11 can be transported in a state of being stably supported by the first transport cart D1 and the second transport cart D2.

[0040] Moreover, according to the transportation method of the jacket structure 10 for the first offshore wind turbine according to the present embodiment, the first leg 11 is placed on each of the first transportation cart D1 and the second transportation cart D2. At this time, the first leg 11 is sandwiched between the first transportation cart D1 and the second transportation cart D2. That is, when the jacket structure 10 for the first offshore wind turbine is transported, the first leg 11 is in a state of being located between the first transportation cart D1 and the second transportation cart D2. Thereby, the jacket structure 10 for the first offshore wind turbine can be stably transported by a plurality of transportation carts D.

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

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

[0043] The jacket structure 10 for the first offshore wind turbine is the same as that of the above-described first embodiment, and thus the description thereof is 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 jacket structure 10 for the first offshore wind turbine includes a first leg 11 inserted into the interior of the first steel pipe pile.

[0044] The jacket structure 20 for the second offshore wind turbine has the same configuration as the jacket structure 10 for the first offshore wind turbine, but is different from the jacket structure 10 for the first offshore wind turbine in that, as shown in FIG. 9, the height is higher than that of the jacket structure 10 for the first offshore wind turbine. In the second embodiment, the leg included in the jacket structure 20 for the second offshore wind turbine is referred to as a second leg 21. Further, the steel pipe pile to which the second leg 21 is connected is referred to as a second steel pipe pile (not shown). That is, in the second embodiment, the jacket structure 20 for the second offshore wind turbine includes a second leg 21 inserted into the interior of the second steel pipe pile.

[0045] The jacket structure 30 for the third offshore wind turbine is different from the jacket structure 10 for the first offshore wind turbine and the jacket structure 20 for the second offshore wind turbine in that, in addition to each configuration included in the jacket structure 10 for the first offshore wind turbine and the jacket structure 20 for the second offshore wind turbine, it further includes a connecting member 32. In the second embodiment, the leg included in the jacket structure 30 for the third offshore wind turbine 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 connecting member 32. That is, in the second embodiment, the jacket structure 30 for the third offshore wind turbine includes a third leg 31 connected to the third steel pipe pile and the fourth steel pipe pile, and a connecting member 32 that connects the third steel pipe pile and the fourth steel pipe pile to the third leg 31. Hereinafter, the details of the connecting member 32 will be described.

[0046] The connecting member 32 is provided at the lower end of the third leg 31. This enables the connecting 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 connecting member 32 includes a third sheath pipe 32a, a fourth sheath pipe 32b, a connection plate 32c, and a reinforcing member 32d. The third sheath pipe 32a is a cylindrical member extending along the vertical direction. A 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 by, for example, grout. The fourth sheath pipe 32b is a cylindrical member extending along the vertical direction. A 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 by, for example, grout.

[0047] Here, in the third offshore windmill jacket structure 30, the connection between the third leg 31, the third steel pipe pile, and the fourth steel pipe pile is performed as follows. That is, first, with the fourth sheath pipe 32b positioned above the fourth steel pipe pile previously driven into the seabed ground, the third offshore windmill jacket structure 30 is moved downward to insert the fourth steel pipe pile into the fourth sheath pipe 32b, and the fourth sheath pipe 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 pipe 32b corresponds to the pre-driven pile. Thereafter, the third steel pipe pile is inserted into the third sheath pipe 32a from above the third sheath pipe 32a, and in this state, the third steel pipe pile is driven into the seabed ground. After the driving of the third steel pipe pile is completed, the third sheath pipe 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 pipe 32a corresponds to the post-driven pile. In order to facilitate the above-described operations, that is, the connection between the third sheath pipe 32a and the third steel pipe pile and the connection between the fourth sheath pipe 32b and the fourth steel pipe pile, it is preferable that a third enlarged diameter portion 32ae and a fourth enlarged diameter portion 32be are respectively formed at the upper end of the third sheath pipe 32a and the lower end of the fourth sheath pipe 32b.

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

[0049] (Modes during fabrication and transportation of the offshore wind turbine jacket structure) Similar to the first offshore wind turbine jacket structure 10 described in the first embodiment, the second offshore wind turbine jacket structure 20 and the third offshore wind turbine jacket structure 30 are fabricated at a ground yard (factory), then transported to an offshore installation location and arranged offshore. Also, the second offshore wind turbine jacket structure 20 and the third offshore wind turbine jacket structure 30 are transported on the ground according to each process during fabrication.

[0050] Hereinafter, the modes during fabrication and transportation of the second offshore wind turbine jacket structure 20 and the third offshore wind turbine jacket structure 30 will be described respectively. Since the modes during fabrication and transportation of the first offshore wind turbine jacket structure 10 are the same as those described in the first embodiment, the description thereof is omitted. In the second embodiment, during transportation of the first offshore wind turbine jacket structure 10, the first installation base S1 is locked to each of the two first transport trolleys D1 and is sandwiched between the two first transport trolleys D1.

[0051] (Modes during fabrication and transportation of the second offshore wind turbine jacket structure) When manufacturing the second offshore windmill jacket structure 20, each of the plurality of second legs 21 is installed on the second installation base S2. When transporting the second offshore windmill jacket structure 20 during manufacturing, for example, when moving the second offshore windmill jacket structure 20 straight, each of the second installation bases S2 on which the second legs 21 are installed is moved in the same direction at the same speed simultaneously by the second transport trolley D2. Alternatively, when bending the advancing direction of the second offshore windmill jacket structure 20, the speeds of the respective second transport trolleys D2 are appropriately changed. The second transport trolley D2 has the same configuration as the first transport trolley D1 of the first embodiment. When transporting the second offshore windmill jacket structure 20, the second leg 21 is installed on the second installation base S2. At this time, the second installation base S2 is supported by one second transport trolley D2. This enables the second installation base S2 and the second leg 21 to be moved by the second transport trolley D2.

[0052] (Second installation base) In the second offshore windmill jacket structure 20, the operation of connecting the second legs 21 with the brace 12 is performed, for example, with the second leg 21 leaned against a jig (not shown). At this time, the lower part of the second leg 21 is installed on the second installation base S2 arranged on the ground. As shown in FIGS. 10 and 11, the second installation base S2 includes a second top plate S2a and a second leg part S2b. The second top plate S2a is a square or rectangular member on which the lower end of the second leg 21 is installed. At this time, two sides of the second top plate S2a are arranged along the advancing direction of the second transport trolley D2. The second top plate S2a is supported by the second leg part S2b. Here, the second leg 21 is provided with a cross-shaped member 11G at the lower end, similar to the first leg 11 of the first offshore windmill jacket structure 10. Therefore, it is preferable that the top plate has the same configuration (hole S2h) as the hole S1h provided in the first installation base S1. Also, the thickness of the second top plate S2a is preferably 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 portion S2b is the portion of the second mounting base S2 that contacts the ground. The second leg portion S2b is provided at both ends of the second top plate S2a. Here, as described above, two sides of the square or rectangular second top plate S2a are arranged along the traveling direction of the second transport cart D2. In the second embodiment, the second leg portion S2b is provided in a pair at both ends of the second top plate S2a in the direction orthogonal to the traveling direction of the second transport cart D2 arranged as described above.

[0054] The second leg portions S2b provided in a pair as described above each include a column portion S2b1 and a column reinforcing portion S2b2. Hereinafter, only one of the second leg portions S2b provided in a pair will be described, and the description of the other will be omitted because it has the same configuration as the one. The column portion S2b1 extends along the direction orthogonal to the ground. The second leg portion S2b is provided at each corner of the square or rectangular second top plate S2a as shown in FIGS. 10 and 11, for example. In other words, two column portions S2b1 are provided along the traveling direction of the second transport cart D2. Alternatively, the column portions S2b1 may be provided in three or more along the traveling direction of the second transport cart D2. The column reinforcing portion S2b2 is provided to reinforce the column portion S2b1. That is, the column reinforcing portion S2b2 connects the lower ends of the plurality of column portions S2b1 provided as described above. Also, the column reinforcing portion S2b2 is provided so as to contact the ground. By this, the column reinforcing portion S2b2 suppresses the deformation of the column portion S2b1 due to the weight of the second leg 21, for example. Also, since the column reinforcing portion S2b2 contacts the ground, the surface area of the second leg portion S2b contacting the ground is increased as compared with the case where only the column portion S2b1 contacts. By this, the load on the ground due to the weight of the second leg 21 is reduced.

[0055] The second installation base S2 having the foregoing configuration is supported by one second transport carriage D2. That is, when lifting the second installation base S2 provided with the second legs 21 by the second transport carriage D2, the second transport carriage D2 enters under the second top plate S2a from between the pair of second leg portions S2b. The second transport carriage D2 lifts the second installation base S2 and the second legs 21 by moving the loading platform Dc upward with the second transport carriage D2 positioned under the second top plate S2a. This enables the second transport carriage D2 to transport the second legs 21 to the second offshore wind turbine jacket structure 20. That is, when transporting the second offshore wind turbine jacket structure 20, one second transport carriage D2 is sandwiched between the second leg portions S2b provided at both ends of the second installation base S2.

[0056] (Modes during manufacturing and transportation of the third offshore wind turbine jacket structure) As shown in FIG. 12, during the manufacturing of the third offshore wind turbine jacket structure 30, each of the plurality of third legs 31 is supported by the third installation base S3. More specifically, the third leg 31 is supported by the third installation base S3 when the third sleeve pipe 32a of the connecting member 32 provided at the lower end of the third leg 31 is installed on the third installation base S3. The transportation of the third offshore wind turbine jacket structure 30 during manufacturing is performed, for example, when moving the third offshore wind turbine jacket structure 30 straight, by simultaneously moving each of the third installation bases S3 provided with the third sleeve pipes 32a in the same direction at the same speed by the third transport carriages D3. Alternatively, when bending the advancing direction of the third offshore wind turbine jacket structure 30, the speeds of the respective third transport carriages D3 are appropriately changed. The third transport carriage D3 has the same configuration as the first transport carriage D1 of the first embodiment. During the transportation of the third offshore wind turbine jacket structure 30, the connecting member 32 is supported by the third installation base S3. At this time, the third installation base S3 is supported by one third transport carriage D3. This enables the third transport carriage D3 to move the third installation base S3 and the third legs 31.

[0057] (The third installation base) In the jacket structure 30 for the third offshore windmill, the operation of connecting the third legs 31 to each other with the brace 12 is performed with the third legs 31 propped against a jig (not shown). At this time, the third legs 31 are supported by a third installation base S3 disposed on the ground. As shown in FIG. 12, the third installation base S3 includes a third top plate S3a and third leg portions S3b (legs). The third top plate S3a is a square or rectangular member on which the lower end of the third sheath pipe 32a is installed. At this time, two sides of the third top plate S3a are arranged along the traveling direction of the third transport carriage D3. The third top plate S3a is supported by the third leg portions S3b. Here, as described above, the third sheath pipe 32a has a 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 in the fourth sheath pipe 32b has lower strength than the lower end of the third sheath pipe 32a. When the fourth sheath pipe 32b having the fourth enlarged diameter portion 32be at the lower end is installed 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 directly placed on the third installation base S3. In other words, it is preferable that the third sheath pipe 32a is installed on the third top plate S3a. Further, the third sheath pipe 32a is a cylindrical member and does not include a cross-shaped member 11G at the lower end. For this reason, holes do not need to be provided in the third top plate S3a. Also, the thickness of the third top plate S3a may be arbitrarily determined as long as the strength capable of supporting the weight acting from the third sheath pipe 32a can be ensured.

[0058] The third leg portions S3b are portions in contact with the ground. The third leg portions S3b are provided at both ends of the third top plate S3a. Here, as described above, two sides of the square or rectangular third top plate S3a are arranged along the traveling direction of the third transport carriage D3. In the second embodiment, the third leg portions S3b are provided in a pair at both ends in the direction orthogonal to the traveling direction of the third transport carriage D3 of the third top plate S3a arranged as described above. The third leg part S3b has the same configuration as the second leg part S2b. That is, as described above, the pair of third leg parts S3b each include a support column part S2b1 and a support column reinforcement part S2b2. The third mounting base S3 having the above-described configuration is supported by one third transport cart D3. That is, when lifting the third mounting base S3 on which the third sheath pipe 32a is installed by the third transport cart D3, the third transport cart D3 enters under the third top plate S3a from between the pair of third leg parts S3b. The third transport cart D3 lifts the third mounting base S3 and the third leg 31 by moving the loading platform Dc upward while the third transport cart D3 is positioned under the third top plate S3a. Thus, the third transport cart D3 can transport the third leg 31 to the third offshore wind turbine jacket structure 30 via the third sheath pipe 32a. That is, when transporting the third offshore wind turbine jacket structure 30, one third transport cart D3 is sandwiched between the third leg parts S3b provided at both ends of the third mounting base S3.

[0059] As described above, according to the offshore wind turbine jacket structure system 1 according to the second embodiment, the first mounting base S1 on which the first leg 11 of the first offshore wind turbine jacket structure 10 is installed is locked to each of the two first transport carts D1 and is sandwiched between the two first transport carts D1. The second mounting base S2 on which the second leg 21 of the second offshore wind turbine jacket structure 20 is installed is supported by one second transport cart D2. The third mounting base S3 on which the connecting member 32 of the third offshore wind turbine jacket structure 30 is installed is supported by one third transport cart D3. In this way, by providing a mounting base individually for each of the plurality of types of offshore wind turbine jacket structures included in the offshore wind turbine jacket structure system 1, a mounting base more suitable for each offshore wind turbine jacket structure can be obtained. Therefore, it is possible to more efficiently manufacture and transport the offshore wind turbine jacket structure. Further, a third sheath tube 32a provided in the connecting member 32 is installed on the third installation base S3. Third leg portions S3b (legs) are provided at both ends of the third installation base S3, and one third transport carriage D3 is sandwiched between the third leg portions S3b provided at both ends. Thereby, it is possible to facilitate the transport of the third offshore windmill jacket structure 30 including the connecting member 32.

[0060] Note that the technical scope of the present disclosure is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present disclosure. For example, a configuration corresponding to the contact member S1d and the claw portion S1c of the first installation base S1 may be provided on the second top plate S2a of the second installation base S2. Further, a configuration corresponding to the contact member S1d of the first installation base S1 may be provided on the third top plate S3a of the third installation base S3.

[0061] In addition, without departing from the spirit of the present disclosure, it is possible to appropriately replace the components in the above-described embodiment with well-known components, and the above-described modified examples may be appropriately combined.

Explanation of Reference Numerals

[0062] 1 Jacket structure system for offshore windmill 10 First jacket structure for offshore windmill 11 First leg 11C Cover member 11G Cross-shaped member 12 Brace 13 Transition piece 20 Second jacket structure for offshore windmill 21 Second leg 30 Third jacket structure for offshore windmill 31 Third leg 32 Connecting member 32a Third sheath tube 32b Fourth sheath tube 32c Connection plate 32d Reinforcing member D Transport carriage D1 First transport carriage D2 Second Transfer Cart D3 Third Transfer Cart H Horizontal Member H1 First Horizontal Member H2 Second Horizontal Member S1 First Installation Table S1a First Leg Portion S1a1 Joint Portion S1b First Beam Portion S1c Claw Portion S1d Contact Member S2 Second Installation Table S2a Second Top Plate S2b Second Leg Portion S2b1 Support Column Portion S2b2 Support Column Reinforcement Portion S3 Third Installation Table S3a Third Top Plate S3b Third Leg Portion

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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