Connecting structure and tension leg foundation assembly

Abstract

The utility model provides a connecting structure and a tension leg foundation assembly. Through the arrangement of the connecting structure, connection between a tension rib key and a foundation pile is achieved. The connecting structure comprises an upper connecting part, a middle connecting piece and a lower connecting part, the upper connecting part is used for being connected with a tension rib key of the tension leg foundation assembly, and the lower connecting part is fixed to a foundation pile of the tension leg foundation assembly; the upper connecting part is hinged to the middle connecting piece and can rotate around a first rotating axis relative to the middle connecting piece, the lower connecting part is also hinged to the middle connecting piece, and the middle connecting piece can rotate around a second rotating axis relative to the lower connecting part. The first rotation axis and the second rotation axis are perpendicular to each other on the same projection plane.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power, in particular to a connection structure and a tension leg foundation assembly. Background Art

[0002] With the transformation of the global energy structure and the enhancement of environmental protection awareness, offshore wind power, as a clean and renewable energy form, has received more and more attention. In the construction of deep-sea wind farms, floating wind turbines have become the inevitable choice for waters with a water depth of more than 60 meters due to their unique advantages. Floating wind turbines are connected to the seabed through a mooring system, which can get rid of the limitations of complex seabed terrain and geological conditions. Their design is less affected by water depth and has a wider range of applications. Among the various forms of floating wind turbines, the tension leg foundation assembly has become the most competitive choice due to its low cost and good applicability.

[0003] As one of the main deep-sea floating foundation forms in marine engineering, the key technology of the tension leg foundation assembly lies in the connection between the tension bar and the foundation pile. As an important component connecting the foundation pile and the floating platform, the tension bar bears the buoyancy of the platform in the water, environmental loads such as wind and waves, and dynamic loads generated by the movement of the platform. How to achieve the connection between the tension bar and the foundation pile has always been a technical problem in this field. Utility Model Content

[0004] The purpose of the utility model is to provide a connection structure and a tension leg foundation assembly, and the connection between the tension tendon key and the foundation pile is achieved by setting the connection structure.

[0005] To achieve the above object, the utility model provides a connection structure, comprising an upper connection part, an intermediate connection member and a lower connection part, wherein the upper connection part is used to connect with the tension tendon key of the tension leg foundation assembly, and the lower connection part is fixed to the foundation pile of the tension leg foundation assembly;

[0006] The upper connecting part is hinged to the middle connecting member and can rotate around a first rotation axis relative to the middle connecting member. The lower connecting part is also hinged to the middle connecting member, and the middle connecting member can rotate around a second rotation axis relative to the lower connecting part. The first rotation axis and the second rotation axis are perpendicular to each other on the same projection plane.

[0007] By adopting the method in this embodiment, the tension bar key can be connected to the foundation pile; the upper connection part can rotate around the first rotation axis relative to the lower connection part under the action of the intermediate connection part, so that the central axis of the upper connection part and the central axis of the lower connection part are set at a certain angle; at the same time, the intermediate connection part can also rotate around the second rotation axis relative to the lower connection part, and by setting the first rotation axis and the second rotation axis at 90°, the connection structure can respond to the horizontal movement of the floating platform; at the same time, under the action of buoyancy, the connection structure can also quickly return to its initial state after the wind and waves pass.

[0008] Optionally, the intermediate connecting member includes a supporting body, the supporting body is a solid box-shaped structure, the supporting body of the box-shaped structure can provide greater structural strength, and the supporting body has two first side surfaces and two second side surfaces arranged opposite to each other;

[0009] The two first side surfaces are both provided with a first rotating shaft, and the two second side surfaces are both provided with a second rotating shaft; the first rotating shaft is used to be hinged to the upper connecting portion, and the second rotating shaft is used to be hinged to the lower connecting portion.

[0010] By arranging two oppositely disposed first rotating shafts and two oppositely disposed second rotating shafts on the supporting body of the box-type structure, the upper connecting part and the lower connecting part are connected with the corresponding first rotating shafts and the second rotating shafts, which not only facilitates the processing of the upper connecting part, the lower connecting part and the intermediate connecting part, but also can improve the tensile bearing range of the connecting structure, thereby meeting the force transmission requirements of thousand-ton alternating loads.

[0011] Optionally, the upper connecting portion is provided with two upper suspension arms, and the lower connecting portion is provided with two lower suspension arms;

[0012] During the rotation of the upper connecting portion, the two upper hanging arms can be inserted into the space defined by the two lower hanging arms, and the two lower hanging arms can pass through the space defined by the two upper hanging arms.

[0013] In this way, the rotation angle of the upper connection part relative to the lower connection part can be increased, so that the connection structure has better adaptability to the floating platform against wind and waves.

[0014] Optionally, the upper connecting portion has an upper base, and the upper suspension arm is arranged on the lower end surface of the upper base;

[0015] The upper base is provided with a mounting hole, which extends axially and passes through the upper end surface of the upper base; the upper base is also provided with a pin hole, which radially passes through the side wall of the upper base and is connected with the mounting hole. In this embodiment, the tension bar key is inserted into the upper base of the upper connecting part through the mounting hole, and then the tension bar key is fixed in the mounting hole through the pin shaft. By extending the tension bar key from the upper end surface of the upper base, it can be ensured that there is no interference when the tension bar key moves on the surface where the upper end surface is located. Since the floating platform will move under the action of the marine environmental load, the movement is irregular. In this way, it is possible to achieve unconstrained movement of the tension bar key on the plane where the upper end surface is located.

[0016] Optionally, the lower connecting portion includes a lower base, and the lower base is used to connect with the top wall of the foundation pile;

[0017] The connection structure includes a plurality of first reinforcing ribs, which are evenly distributed around the lower base and are used to be fixedly connected to the pile top wall. In this way, it is possible to adapt to the pulling force of the upper connection part and the intermediate connection member on the lower connection part in any direction in the circumferential direction, increase the connection strength between the lower connection part and the pile top wall, and at the same time increase the compressive strength of the lower connection part in a direction perpendicular to the pile top wall.

[0018] Optionally, the connection structure further includes a plurality of second reinforcing ribs; the plurality of second reinforcing ribs are all used to fix to the side of the pile top wall of the foundation pile opposite to the first reinforcing rib, and are also used to fix to the pile side wall of the foundation pile. Since the pile top wall and the pile side wall are welded, in order to increase the pull-out strength of the pile top wall, a plurality of second reinforcing ribs are provided between the pile top wall and the pile inner wall.

[0019] Optionally, the first reinforcing rib is aligned with the second reinforcing rib in the axial direction. By aligning the first reinforcing rib with the second reinforcing rib, the pull-out strength of the pile top wall relative to the pile side wall can be further increased.

[0020] Optionally, a weight-reducing hole is provided in the middle of the lower base body, and the weight-reducing hole axially penetrates the lower base body. By providing the weight-reducing hole, the weight of the lower base body can be reduced while increasing the structural strength of the lower base body.

[0021] Optionally, the top surface of the lower base is provided with two lower suspension arms, the weight-reducing hole penetrates the top surface to form an opening, and the two lower suspension arms are radially symmetrically arranged relative to the opening. In this way, the radial compression resistance of the two lower suspension arms can be increased.

[0022] The present application also provides a tension leg foundation assembly, comprising a tension bar key, a foundation pile and a floating platform, wherein the foundation pile is used to connect to the seabed, the floating platform is used to support an offshore wind turbine, and the foundation pile and the floating platform are connected via the tension bar key;

[0023] The tension leg foundation assembly further comprises the above-mentioned connection structure, and the tension tendon key is connected to the foundation pile via the connection structure. By providing the above-mentioned connection structure, the tension tendon key can be connected to the foundation pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0025] Figure 1 It is a schematic diagram of the structure in which the tension bar key, the connection structure and the foundation pile are connected in the embodiment of the utility model;

[0026] Figure 2 yes Figure 1 sectional view of

[0027] Figure 3 It is a structural schematic diagram of the upper connecting portion of the connecting structure in the embodiment of the utility model;

[0028] Figure 4 It is a structural schematic diagram of an intermediate connecting member of a connecting structure in an embodiment of the utility model;

[0029] Figure 5 It is a structural schematic diagram of the lower connecting portion of the connecting structure in the embodiment of the utility model;

[0030] Figure 6 It is a schematic diagram of the connection state of the tension leg foundation assembly in the embodiment of the utility model.

[0031] Figure 1-Figure 6 middle:

[0032] 100. Connection structure;

[0033] 110, upper connecting portion; 111, upper base; 111a, upper end surface; 111b, lower end surface; 112, upper suspension arm; 112a, first shaft hole; 113, pin hole; 114, mounting hole;

[0034] 120, intermediate connecting member; 121, supporting body; 121a, first side surface; 121b, second side surface; 122, first rotating shaft; 123, second rotating shaft;

[0035] 130, lower connecting part; 131, lower base; 131a, top end surface; 131b, bottom end surface; 132, lower suspension arm; 132a, second shaft hole; 133, weight reduction hole;

[0036] 140, first reinforcement rib;

[0037] 150, second reinforcement rib;

[0038] 200. Floating platform;

[0039] 300, foundation pile; 310, pile top wall; 320, pile side wall;

[0040] 400, tension tendon key;

[0041] L1, first rotation axis; L2, second rotation axis. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0043] Relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0044] Please refer to Figures 1 to 6 , Figure 1 It is a structural schematic diagram of the connection between the tension bar key 400, the connection structure 100 and the foundation pile 300 in the embodiment of the utility model; Figure 2 yes Figure 1 sectional view of Figure 3 1 is a schematic structural diagram of the upper connecting portion 110 of the connecting structure 100 in the embodiment of the present utility model; Figure 4 1 is a schematic structural diagram of an intermediate connecting member 120 of a connecting structure 100 in an embodiment of the present utility model; Figure 5 1 is a schematic structural diagram of the lower connecting portion 130 of the connecting structure 100 in the embodiment of the present utility model; Figure 6 Schematic diagram of the connection state of the tension leg foundation assembly in the embodiment of the utility model. Figure 6 The position indicated by the arrow A is the position where the connection structure 100 in the present application is arranged.

[0045] The utility model provides a connection structure 100, including an upper connection part 110, an intermediate connection part 120 and a lower connection part 130. The upper connection part 110 is used to connect with the tension bar key 400 of the tension leg foundation assembly, and the lower connection part 130 is fixed to the foundation pile 300 of the tension leg foundation assembly. Among them, one end of the tension bar key 400 is connected to the foundation pile 300, and the other end is connected to the floating platform 200 supporting the offshore wind turbine. The tension bar key 400 can be a strong tensioning structure such as a wire rope, an anchor chain or high molecular polyethylene, aramid, etc. The foundation pile 300 is a driven or suction cylinder pile foundation structure, which can obtain stable pull-out resistance from the seabed.

[0046] The upper connecting portion 110 is hinged to the intermediate connecting member 120 and can rotate around the first rotation axis L1 relative to the intermediate connecting member 120. The lower connecting portion 130 is also hinged to the intermediate connecting member 120, and the intermediate connecting member 120 can rotate around the second rotation axis L2 relative to the lower connecting portion 130. The first rotation axis L1 and the second rotation axis L2 both pass through the intermediate connecting member 120, and the first rotation axis L1 and the second rotation axis L2 are perpendicular to each other on the same projection plane; the projection plane can be a projection plane formed by projection in the vertical direction, or it can be a projection plane formed by projection in the horizontal direction, and technical personnel in this field can set it by themselves.

[0047] By adopting the method in this embodiment, the tension bar key 400 can be connected to the foundation pile 300; the upper connection part 110 can rotate around the first rotation axis L1 relative to the lower connection part 130 under the action of the intermediate connection member 120, so that the central axis of the upper connection part 110 and the central axis of the lower connection part 130 are set at a certain angle; at the same time, the intermediate connection member 120 can also rotate around the second rotation axis L2 relative to the lower connection part 130, and by setting the first rotation axis L1 and the second rotation axis L2 at 90°, the connection structure 100 can respond to the horizontal movement of the floating platform 200; at the same time, under the action of buoyancy, the connection structure 100 can also quickly return to its initial state after the wind and waves pass.

[0048] In the above-mentioned embodiment, the intermediate connecting member 120 includes a supporting body 121, and the supporting body 121 is a solid box-type structure. The corner positions of the box-type structure can be provided with chamfers, thereby simplifying the clearance fit design between the upper connecting part 110, the intermediate connecting member 120 and the lower connecting part 130; the supporting body 121 of the box-type structure can provide greater structural strength. At the same time, the supporting body 121 has two first side surfaces 121a and two second side surfaces 121b that are arranged opposite to each other; the first side surface 121a and the second side surface 121b are connected in sequence, that is, the first side surface 121a and the second side surface 121b surround and form the side wall of the box-type structure, and the center line of the space enclosed by the first side surface 121a and the second side surface 121b can also extend vertically or horizontally.

[0049] Both first side surfaces 121a are provided with a first rotating shaft 122, and the central axes of the two first rotating shafts 122 coincide with each other; both second side surfaces 121b are provided with a second rotating shaft 123, and the central axes of the two second rotating shafts 123 coincide with each other; the first rotating shaft 122 is used to be hinged to the upper connecting part 110, and the second rotating shaft 123 is used to be hinged to the lower connecting part 130.

[0050] By arranging two oppositely disposed first rotating shafts 122 and two oppositely disposed second rotating shafts 123 on the support body 121 of the box-type structure, the upper connecting part 110 and the lower connecting part 130 are connected with the corresponding first rotating shafts 122 and second rotating shafts 123, which not only facilitates the processing of the upper connecting part 110, the lower connecting part 130 and the intermediate connecting part 120, but also can improve the tensile bearing range of the connecting structure 100, thereby meeting the force transmission requirements of kiloton alternating loads.

[0051] In an optional embodiment, the upper connecting portion 110 is provided with two upper hanging arms 112, and the lower connecting portion 130 is provided with two lower hanging arms 132, the two upper hanging arms 112 are arranged radially opposite to each other, and the two lower hanging arms 132 are arranged radially opposite to each other; during the rotation of the upper connecting portion 110, the two upper hanging arms 112 can be inserted into the space defined by the two lower hanging arms 132, and the two lower hanging arms 132 can pass through the space defined by the two upper hanging arms 112. Both the upper hanging arms 112 are provided with a first shaft hole 112a adapted to the first rotating shaft 122; and both the lower hanging arms 132 are provided with a second shaft hole 132a adapted to the second rotating shaft 123.

[0052] In this way, the rotation angle of the upper connection part 110 relative to the lower connection part 130 can be increased, so that the connection structure 100 has better adaptability to the floating platform 200 against wind and waves.

[0053] In an optional embodiment, the upper connecting portion 110 has an upper base 111, which is a cylindrical structure, and the upper suspension arm 112 is arranged on the lower end surface 111b of the upper base 111; the lower end surface 111b is the end surface of the upper base 111 that is axially closer to the lower connecting portion 130, and the upper base 111 also has an upper end surface 111a, which is axially opposite to the lower end surface 111b and is located on the side away from the lower connecting portion 130.

[0054] The upper base 111 is provided with a mounting hole 114, which extends axially and penetrates the upper end surface 111a of the upper base 111; the upper base 111 is also provided with a pin hole 113, which penetrates the side wall of the upper base 111 in the radial direction and communicates with the mounting hole 114. In this embodiment, the tension bar key 400 is inserted into the upper base 111 of the upper connecting part 110 through the mounting hole 114, and then the tension bar key 400 is fixed in the mounting hole 114 by a pin shaft. By extending the tension bar key 400 from the upper end surface 111a of the upper base 111, it can be ensured that there is no interference when the tension bar key 400 moves on the surface where the upper end surface 111a is located. Since the floating platform 200 will move under the action of the marine environmental load, the movement is irregular. In this way, the tension bar key 400 can be realized to move without constraint on the plane where the upper end surface 111a is located.

[0055] In another optional embodiment, the lower connecting portion 130 includes a lower base 131, which is also a cylindrical structure, and the lower base 131 is used to be fixedly connected to the pile top wall 310 of the foundation pile 300; specifically, the surface of the lower base 131 away from the upper base 111 is the bottom end surface 131b of the lower base 131, and the bottom end surface 131b is pressed against the pile top wall 310 of the foundation pile 300 and welded to the pile top wall 310, thereby enabling the lower base 131 to be fixedly connected to the foundation pile 300.

[0056] The connection structure 100 includes a plurality of first reinforcing ribs 140, which are evenly distributed around the lower base 131 and are used to be fixedly connected to the pile top wall 310. The first reinforcing ribs 140 are plate-shaped structures, the first reinforcing ribs 140 are perpendicular to the pile top wall 310 and are welded to the pile top wall 310, the side walls of the first reinforcing ribs 140 are attached to and welded to the outer side walls of the lower base 131, and extend a certain length in the axial direction. The first reinforcing ribs 140 can be 2, 3, 4 or 6, or more, and those skilled in the art can select the number of the first reinforcing ribs 140 by themselves.

[0057] In this way, the upper connecting part 110 and the intermediate connecting member 120 can adapt to the pulling force on the lower connecting part 130 in any circumferential direction, thereby increasing the connection strength between the lower connecting part 130 and the pile top wall 310 and increasing the compressive strength of the lower connecting part 130 in a direction perpendicular to the pile top wall 310.

[0058] In this embodiment, the connection structure 100 also includes a plurality of second reinforcing ribs 150, which extend radially along the foundation pile 300 and intersect with each other, and the positions where the second reinforcing ribs intersect are located at the position where the center of the pile top wall 310 is located; the plurality of second reinforcing ribs 150 are all used to fix to the pile top wall 310 of the foundation pile 300, and are also used to fix to the pile side wall 320 of the foundation pile 300. That is, the pile top wall 310 has an upper surface and a lower surface, the upper surface serves as a part of the outer wall of the foundation pile 300, and the lower surface serves as a part of the inner wall of the foundation pile 300, the first reinforcing rib 140 is welded to the upper surface of the pile top wall 310, the second reinforcing rib 150 is arranged on the lower surface of the pile top wall 310, the second reinforcing rib 150 extends along the radial direction of the pile top wall 310, and both ends of the second reinforcing rib 150 are welded to the pile side wall 320, the top end surface 131a of the second reinforcing rib 150 is attached to the lower surface of the pile top wall 310 to form a weld, and since the pile top wall 310 and the pile side wall 320 are welded, in order to increase the pull-out strength of the pile top wall 310, a plurality of second reinforcing ribs 150 are arranged between the pile top wall 310 and the pile inner wall.

[0059] Furthermore, the first reinforcing rib 140 and the second reinforcing rib 150 are aligned in the axial direction, that is, the first reinforcing rib 140 and the second reinforcing rib 150 are located in the same plane; by aligning the first reinforcing rib 140 and the second reinforcing rib 150, the pull-out strength of the pile top wall 310 relative to the pile side wall 320 can be further increased.

[0060] In the above embodiment, a weight-reducing hole 133 is provided in the middle of the lower base 131, and the weight-reducing hole 133 axially penetrates the lower base 131. The weight-reducing hole 133 can reduce the weight of the lower base 131 and increase the structural strength of the lower base 131.

[0061] Optionally, the top surface 131a of the lower base 131 is provided with two lower suspension arms 132, the weight-reducing hole 133 penetrates the top surface 131a to form an opening, and the two lower suspension arms 132 are radially symmetrically arranged relative to the opening. In this way, the radial compression resistance of the two lower suspension arms 132 can be increased.

[0062] In the above embodiment, the first rotating shaft 122 and the support body 121 can be threadedly connected, and the second rotating shaft 123 and the support body 121 can also be threadedly connected. Of course, the first rotating shaft 122, the second rotating shaft 123 and the support body 121 can also adopt other connection methods. This part is the existing technology and will not be further explained here.

[0063] The present application also provides a tension leg foundation assembly, including a tension bar key 400, a foundation pile 300 and a floating platform 200, wherein the foundation pile 300 is used to connect to the seabed, the floating platform 200 is used to support an offshore wind turbine, and the foundation pile 300 and the floating platform 200 are connected via the tension bar key 400; the tension leg foundation assembly also includes the above-mentioned connection structure 100, and the tension bar key 400 is connected to the foundation pile 300 via the connection structure 100. By providing the above-mentioned connection structure 100, the tension bar key 400 can be connected to the foundation pile 300.

[0064] The connection structure 100 provided by the present invention is introduced in detail above. The principle and implementation method of the present invention are described in detail using specific examples herein. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A connection structure, characterized in that: It comprises an upper connection part (110), an intermediate connection piece (120) and a lower connection part (130), wherein the upper connection part (110) is used to connect with a tension tendon key (400) of a tension leg foundation assembly, and the lower connection part (130) is fixed to a foundation pile (300) of the tension leg foundation assembly; The upper connecting part (110) is hingedly connected to the intermediate connecting member (120) and can rotate relative to the intermediate connecting member (120) around a first rotation axis. The lower connecting part (130) is also hingedly connected to the intermediate connecting member (120), and the intermediate connecting member (120) can rotate relative to the lower connecting part (130) around a second rotation axis. The first rotation axis and the second rotation axis are perpendicular to each other on the same projection plane.

2. The connection structure according to claim 1, characterized in that: The intermediate connecting member (120) comprises a supporting body (121), wherein the supporting body (121) is a solid box-shaped structure having two first side surfaces (121a) and two second side surfaces (121b) arranged opposite to each other; The two first side surfaces (121a) are each provided with a first rotating shaft (122), and the two second side surfaces (121b) are each provided with a second rotating shaft (123); the first rotating shaft (122) is used to be hingedly connected to the upper connecting portion (110), and the second rotating shaft (123) is used to be hingedly connected to the lower connecting portion (130).

3. The connection structure according to claim 2, characterized in that: The upper connecting portion (110) is provided with two upper suspension arms (112), and the lower connecting portion (130) is provided with two lower suspension arms (132); During the rotation of the upper connecting portion (110), the two upper suspension arms (112) can be inserted into the space defined by the two lower suspension arms (132), and the two lower suspension arms (132) can pass through the space defined by the two upper suspension arms (112).

4. The connection structure according to claim 3, characterized in that: The upper connecting portion (110) comprises an upper base (111), and the upper suspension arm (112) is arranged on a lower end surface (111b) of the upper base (111); The upper base (111) is provided with a mounting hole (114), the mounting hole (114) extending axially and penetrating the upper end surface (111a) of the upper base (111); the upper base (111) is also provided with a pin hole (113), the pin hole (113) radially penetrating the side wall of the upper base (111) and communicating with the mounting hole (114).

5. The connection structure according to any one of claims 1 to 4, characterized in that: The lower connecting portion (130) comprises a lower base (131), and the lower base (131) is used to be fixedly connected to the pile top wall (310) of the foundation pile (300); The connection structure (100) comprises a plurality of first reinforcing ribs (140), wherein the plurality of first reinforcing ribs (140) are evenly distributed around the lower base body (131) and are used for fixed connection with the pile top wall (310).

6. The connection structure according to claim 5, characterized in that: The connection structure (100) further comprises a plurality of second reinforcing ribs (150); the plurality of second reinforcing ribs (150) are all used to be fixed to the pile top wall (310) of the foundation pile (300), and are also used to be fixed to the pile side wall (320) of the foundation pile (300).

7. The connection structure according to claim 6, characterized in that: The first reinforcing rib (140) and the second reinforcing rib (150) are aligned in the axial direction.

8. The connection structure according to claim 5, characterized in that: A weight-reducing hole (133) is provided in the middle of the lower base body (131), and the weight-reducing hole (133) axially penetrates the lower base body (131).

9. The connection structure according to claim 8, characterized in that: The top end surface (131a) of the lower base body (131) is provided with two lower suspension arms (132), the weight-reducing hole (133) penetrates the top end surface (131a) to form an opening, and the two lower suspension arms (132) are symmetrically arranged in the radial direction relative to the opening.

10. A tension leg foundation assembly, characterized in that: It comprises a tension bar key (400), a foundation pile (300) and a floating platform (200), wherein the foundation pile (300) is used to be connected to the seabed, the floating platform (200) is used to support an offshore wind turbine, and the foundation pile (300) and the floating platform (200) are connected via the tension bar key (400); The tension leg foundation assembly further comprises a connection structure (100) as claimed in any one of claims 1 to 9, and the tension tendon key (400) is connected to the foundation pile (300) via the connection structure (100).

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