Floating foundation construction method, floating foundation and wind turbine generator unit

Abstract

This application provides a floating foundation construction method, a floating foundation, and a wind turbine generator set. The floating foundation construction method involves prefabricating a floating body and a first and second connecting frame assembly. The floating body has a top wall and a bottom wall opposite each other along a first direction, as well as a side wall connecting the top and bottom walls. The floating body, the first connecting frame, and the second connecting frame are transferred to a predetermined area for the floating foundation before being connected, achieving on-site assembly of the floating foundation within the predetermined area and avoiding the overall hoisting and transportation of the floating foundation in existing technologies. By transferring the multiple separately configured components that make up the floating foundation to the construction site for assembly, the requirements for hoisting sites and equipment are reduced, the workload on the construction site is simplified, and the construction difficulty is reduced, thus shortening the construction period.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a floating foundation construction method, a floating foundation, and a wind turbine generator set. Background Technology

[0002] Wind energy, as a clean energy source, is attracting increasing attention. Compared to land, offshore wind resources are more abundant, making offshore wind power projects increasingly advantageous.

[0003] As offshore wind turbines are transported further and further from shore, floating wind turbines are attracting increasing attention. The foundation of a wind turbine supports heavy structures such as the nacelle, generator, rotor, and tower. It not only needs to withstand significant loads but also possess excellent stability. In related technologies, floating foundations are typically fabricated on steel floating platforms at the dock, then hoisted into the water and transported to the construction site. This process not only consumes a large amount of steel but also involves a long construction period and considerable difficulty. Summary of the Invention

[0004] In view of the above problems, this application provides a floating foundation construction method, a floating foundation and a wind turbine generator set. The floating foundation construction method is beneficial to reducing construction difficulty and shortening the construction period.

[0005] In a first aspect, this application provides a method for constructing a floating foundation, which includes the following steps:

[0006] The transfer step involves transferring the separately configured float, the first connecting frame, and the second connecting frame to a predetermined area where a floating foundation is set. The float has a top wall and a bottom wall that are arranged opposite each other along a first direction, as well as a side wall connecting the top wall and the bottom wall.

[0007] The assembly process involves connecting the top walls of two adjacent floats using a first connecting frame and connecting the side walls of two adjacent floats using a second connecting frame.

[0008] In the floating foundation construction method provided in some embodiments of this application, the assembly step includes:

[0009] Place at least two buoys on the water surface in the designated area;

[0010] The first connecting frame is stacked on the top wall of each float and connected to the top wall of each float;

[0011] The second connecting frame is placed between two adjacent floats and connected to the side walls of the two adjacent floats.

[0012] The floating foundation construction method provided in some embodiments of this application also includes a mooring step, which includes:

[0013] Install fixed piles on the seabed in the designated area;

[0014] The second connecting frame is connected to the fixed pile by anchor chains.

[0015] In the floating foundation construction method provided in some embodiments of this application, the top wall of the float is provided with a first connecting hole, and the first connecting frame is provided with a first prestressed tendon;

[0016] The steps of stacking the first connecting frame on the top wall of each float and connecting it to the top wall of each float include:

[0017] The first connecting frame is stacked on the top wall of each float;

[0018] The first prestressed tendon of the first connecting frame is inserted into and connected to the first connecting hole on the top wall.

[0019] In the floating foundation construction method provided in some embodiments of this application, a second connecting hole is provided on the side wall of the float, and a second prestressing tendon is provided in the second connecting frame;

[0020] The steps of placing the second connecting frame between two adjacent floats and connecting it to the sidewalls of the two adjacent floats include:

[0021] The second connecting frame is placed between two adjacent floats, and the second prestressed tendon of the second connecting frame is inserted and connected to the second connecting hole on the side wall.

[0022] In the floating foundation construction method provided in some embodiments of this application, the first connecting frame includes a first support and a second support;

[0023] Prior to the step of stacking the first connecting frame on the top wall of each float and connecting it to the top wall of each float, the following is also included:

[0024] The first bracket and the second bracket are connected to each other to form the first connecting frame.

[0025] In some embodiments of the floating foundation construction method provided in this application, the method further includes the following steps before the transfer step:

[0026] The prefabrication process involves prefabricating a separate floating body, a first support, a second support, and a second connecting frame.

[0027] In the floating foundation construction method provided in some embodiments of this application, the prefabrication step includes:

[0028] Provide molds for forming the float, the first support, the second support, and the second connecting frame;

[0029] Concrete slurry is poured into the molds of the float, the first support, the second support, and the second connecting frame, respectively, and solidified to form the float, the first support, the second support, and the second connecting frame.

[0030] Secondly, this application also provides a floating foundation, which includes:

[0031] At least two floats are arranged at intervals, and the floats have opposing top walls, bottom walls and side walls connecting the top walls and bottom walls along a first direction;

[0032] The connecting frame assembly includes a first connecting frame and a second connecting frame. The first connecting frame is connected to the top wall of each float, and the second connecting frame is connected between the side walls of two adjacent floats. The first connecting frame is used to connect the tower body.

[0033] According to some embodiments of the present application, a floating foundation is provided in which an overflow port is formed in the first connecting frame, and the overflow port is polygonal in shape.

[0034] According to some embodiments of this application, the floating foundation includes at least two spaced-apart first supports, at least two spaced-apart second supports, and a plurality of reinforcing supports. The two ends of the first supports are respectively connected to two adjacent second supports, and the reinforcing supports are connected between the first supports and the second supports to form a flow port.

[0035] According to some embodiments of this application, the floating foundation has a second support arranged along the length of the floating body, with both ends of the second support connected to two first supports stacked on each floating body, and the tower body connected to the first support.

[0036] According to some embodiments of this application, the floating foundation has a cavity in the float and ballast material is disposed at the bottom of the cavity.

[0037] According to some embodiments of this application, the floating foundation is configured as a fluid, and a connecting channel is provided in the second connecting frame, which connects the cavities of two adjacent floats.

[0038] According to some embodiments of this application, the floating foundation has a cavity with a partition that divides the cavity into at least two independently configured compartments.

[0039] According to some embodiments of this application, the floating foundation is configured as a cuboid structure, with both ends of the floating body being cone-shaped structures.

[0040] Thirdly, some embodiments of this application also provide a wind turbine generator set, which includes:

[0041] The floating foundation provided by any of the above technical solutions;

[0042] The tower body is connected to the first connecting frame of the floating foundation;

[0043] The fixed piles are connected to the seabed, and the second connecting frame of the floating foundation is connected to the fixed piles via anchor chains.

[0044] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0045] This application provides a method for constructing a floating foundation. This method involves prefabricating a floating body and a first and second connecting frame assembly. The floating body has a top wall and a bottom wall opposite each other along a first direction, as well as a side wall connecting the top and bottom walls. The floating body, the first connecting frame, and the second connecting frame are transferred to a predetermined area for the floating foundation before being connected, achieving on-site assembly of the floating foundation within the predetermined area and avoiding the overall hoisting and transportation of the floating foundation as in existing technologies. By transferring the multiple separately configured components that make up the floating foundation to the construction site for assembly, the requirements for hoisting sites and equipment are reduced, the workload on the construction site is simplified, and the construction difficulty is reduced, thus shortening the construction period.

[0046] This application provides a floating foundation in which a first connecting frame is connected to the top wall of each float, and a second connecting frame is connected between the side walls of two adjacent floats. The first connecting frame is used to connect the tower body, so that the tower body can be connected to the top wall of the float through the first connecting frame. This allows the load transmitted from the tower body in the vertical direction to be transferred to the entire side wall after acting on the top wall of the float, rather than acting on a certain part of the side wall of the float, thereby reducing the concentration of side wall load and improving the stress condition of the floating foundation.

[0047] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0049] In the attached diagram:

[0050] Figure 1 A flowchart illustrating a floating foundation construction method provided in some embodiments of this application;

[0051] Figure 2 A flowchart of the assembly steps in a floating foundation construction method provided in some embodiments of this application;

[0052] Figure 3 A flowchart of the mooring steps in a floating foundation construction method provided in some embodiments of this application;

[0053] Figure 4 This is a top view of the floating body in the floating foundation construction method provided in some embodiments of this application;

[0054] Figure 5 This is a schematic diagram of the first prestressed tendon in the first connecting frame of the floating foundation construction method provided in some embodiments of this application;

[0055] Figure 6 An exploded view of the first connecting frame in the floating foundation construction method provided in some embodiments of this application;

[0056] Figure 7 This is a flowchart of the prefabrication step in the floating foundation construction method provided in some embodiments of this application;

[0057] Figure 8 This is a schematic diagram of the structure of a floating foundation provided in some embodiments of this application;

[0058] Figure 9 A schematic diagram of the compartments in a floating body within a floating foundation provided in some embodiments of this application;

[0059] Figure 10 This is a schematic diagram of the structure of a wind turbine generator set provided in some embodiments of this application.

[0060] 1. Floating body; 11. Bulkhead; 12. Cavity; 121. Compartment; 13. Connecting hole; 14. First prestressed tendon; 15. Top wall; 16. Bottom wall; 17. Side wall; 21. First connecting frame; 211. First support; 212. Second support; 213. Reinforcing support; 22. Second connecting frame; 221. Mooring structure; 23. Flow outlet; 20. Tower body; 30. Fixed pile; 40. Seabed; 50. Anchor chain. Detailed Implementation

[0061] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0062] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0063] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0064] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0065] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0066] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] As people increasingly value environmental protection, clean energy is gaining more and more attention. Wind energy, as a clean energy source, has attracted particular interest. Compared to onshore wind power, offshore wind resources are more abundant, making offshore wind power projects increasingly advantageous.

[0068] In order to better capture abundant wind energy, offshore wind turbines are being moved further and further away from the shore, and floating wind turbines that can be located far from the shore are attracting more and more attention.

[0069] In related technologies, the foundations of wind turbine generators are used to support heavy structures such as the nacelle, generator, rotor, and tower. They not only need to withstand large loads but also require good stability. Currently, the fabrication of floating foundations typically involves building a steel floating platform at a dock, then hoisting it into the water and transporting it to the designated construction site. The applicant notes that the fabrication of floating foundations not only consumes a large amount of steel but also involves a long construction period and significant challenges.

[0070] To reduce the construction difficulty and shorten the construction period of floating foundations, the applicant, through in-depth research, discovered that the construction method of floating foundations can be divided into transfer and assembly steps. The floating body, the first connecting frame, and the second connecting frame are set up separately. They are then connected after being transferred to the predetermined area. This allows for on-site assembly of the floating foundation in the predetermined area, avoiding the overall hoisting and transportation of the floating foundation in the existing technology. It can reduce the requirements for hoisting sites and equipment, simplify the workload on the construction site, and help reduce construction difficulty and shorten the construction period.

[0071] The following provides a further explanation of the floating foundation construction method, floating foundation, and wind turbine generator set technical solutions provided in the specific embodiments of this application.

[0072] Some embodiments of this application provide a floating foundation construction method, such as... Figure 1 As shown, the floating foundation construction method includes a transfer step and an assembly step.

[0073] S100. Transfer step: Transfer the separately configured float 1, first connecting frame 21 and second connecting frame 22 to a predetermined area for setting the floating foundation. The float 1 has a top wall 15 and a bottom wall 16 arranged opposite to each other along a first direction, and a side wall 17 connecting the top wall 15 and the bottom wall 16.

[0074] S200, Assembly step: Connect the top walls 15 of two adjacent floats 1 through the first connecting frame 21, and connect the side walls 17 of two adjacent floats 1 through the second connecting frame 22.

[0075] The floating body 1 refers to a component that floats on the water surface, providing buoyancy to the floating foundation and allowing it to float. The floating body 1 can be made of a material with a density less than water, enabling it to not only float on the water surface but also provide buoyancy to the floating foundation. Alternatively, the floating body 1 can have a cavity 12 structure within its own structure, making its own weight less than the buoyancy it experiences, thus allowing it to not only float on the water surface but also provide buoyancy to the floating foundation.

[0076] The first direction can refer to the vertical direction when the floating foundation is placed on the water surface. The float 1 has a top wall 15 and a bottom wall 16 positioned opposite each other along this first direction. When the floating foundation is placed on the water surface, the top wall 15 and bottom wall 16 are spaced apart vertically, giving the float 1 a certain height. This allows the float 1 to have a sufficiently large volume, thus providing greater buoyancy. The top wall 15, bottom wall 16, and side wall 17 can all refer to the structures of the float 1, which are interconnected to form a single structure. The top wall 15 can refer to the wall structure with the highest height when the floating foundation is placed on the water surface. The bottom wall 16 can refer to the wall structure spaced parallel to the top wall 15 along the first direction. The side wall 17 can refer to the wall structure extending along the first direction and connecting the bottom wall 16 and the top wall 15.

[0077] The transfer step involves moving the separately configured float 1, first connecting frame 21, and second connecting frame 22 to a predetermined area for setting up the floating foundation. This can refer to transferring the float 1, first connecting frame 21, and second connecting frame 22 separately and individually to the predetermined area for setting up the floating foundation. By separating the float 1, first connecting frame 21, and second connecting frame 22, they can be hoisted and transported individually, rather than as a single structure. This significantly reduces the weight required for hoisting and transportation, greatly lowers the requirements for hoisting sites and equipment, and helps reduce construction difficulty.

[0078] The assembly process involves connecting the top walls 15 of two adjacent floats 1 using a first connecting frame 21, and connecting the side walls 17 of two adjacent floats 1 using a second connecting frame 22. Specifically, the first connecting frame 21 connects the top walls 15 of two adjacent floats 1, and the second connecting frame 22 connects the side walls 17 of two adjacent floats 1. By connecting the first connecting frame 21 and the second connecting frame 22 at different positions on the floats 1, and distributing them at intervals in the height direction, it helps reduce the swaying of two adjacent floats 1 in a direction perpendicular to the first direction. This reduces the swaying of the floating foundation on the horizontal plane when it is placed on the water surface, thereby reducing the possibility of the floating foundation capsizing and improving its safety.

[0079] In some embodiments, such as Figure 2 As shown, the assembly steps include:

[0080] S201. Place at least two buoys 1 on the water surface of the predetermined area.

[0081] S202, The first connecting frame 21 is stacked on the top wall 15 of each float 1 and connected to the top wall 15 of each float 1.

[0082] S203. The second connecting frame 22 is placed between two adjacent floats 1 and connected to the side wall 17 of the two adjacent floats 1.

[0083] In the above assembly steps, placing at least two floats 1 on the water surface of the predetermined area can mean that when the floats 1 are to be transported to the predetermined area where the floating foundation is to be set, at least two floats 1 are to be floated on the water surface of the predetermined area, and then the first connecting frame 21 and the second connecting frame 22 are to be connected, so that the floating foundation can be installed on the water surface of the predetermined area.

[0084] Stacking the first connecting frame 21 on the top wall 15 of each float 1 and connecting it to the top wall 15 of each float 1 can mean that the first connecting frame 21 is first placed on the top wall 15 of at least two floats 1 by means of hoisting or other methods, so that the at least two floats 1 floating on the water surface support the first connecting frame 21, and then the first connecting frame 21 is connected to the top wall 15 of the at least two floats 1 that it contacts. In some embodiments, the first connecting frame 21 can be connected to the top wall 15 of the at least two floats 1 that it contacts using a connector, or the first connecting frame 21 can be connected to the top wall 15 of the at least two floats 1 that it contacts using an adhesive, so that the first connecting frame 21 is firmly connected to the top wall 15 of the floats 1 that it contacts. Those skilled in the art can choose the connection method between the first connecting frame 21 and the top wall 15 of the float 1 according to the actual situation, as long as the connection between the first connecting frame 21 and the top wall 15 of the float 1 is firm.

[0085] The placement of the second connecting frame 22 between two adjacent floats 1 and its connection to the side walls 17 of the two adjacent floats 1 can mean that the second connecting frame 22 is first placed between the side walls 17 of the two adjacent floats 1 by means of hoisting or other methods, and then the second connecting frame 22 is respectively connected to the side walls 17 of the two adjacent floats 1. In some embodiments, the second connecting frame 22 can be connected to the side walls 17 of the two floats 1 in contact with it using a connector, or the second connecting frame 22 can be connected to the side walls 17 of the two floats 1 in contact with it using an adhesive, so that the second connecting frame 22 is firmly connected to the side walls 17 of the two adjacent floats 1. Those skilled in the art can choose the connection method between the second connecting frame 22 and the side walls 17 of the floats 1 according to the actual situation, as long as the connection between the second connecting frame 22 and the side walls 17 of the floats 1 is firm.

[0086] In some embodiments, the floating foundation construction method further includes a mooring step, such as... Figure 3 As shown, the mooring steps include:

[0087] S301. Install fixed piles 30 on the seabed 40 in the predetermined area.

[0088] S302. The second connecting frame 22 is connected to the fixed pile 30 by the anchor chain 50.

[0089] The fixed pile 30 can refer to the pile used to fix the floating foundation. It is set in the seabed 40 of the predetermined area and connected to the rocks of the seabed 40. It can provide a large force to the floating foundation through the anchor chain 50, so that the floating foundation is confined to the predetermined area.

[0090] Anchor chain 50 can refer to a chain used to connect the fixed pile 30 and the floating foundation. In some embodiments, the second connecting frame 22 is provided with a mooring structure 221, and the anchor chain 50 is connected between the mooring structure 221 and the fixed pile 30 to fix the floating foundation.

[0091] The floating foundation can employ three-point mooring, meaning it is equipped with three fixed piles 30 and three anchor chains 50 corresponding to the floating foundation. The second connecting frame 22 has three mooring structures 221, and the three anchor chains 50 are connected to the three fixed piles 30 and the three mooring structures 221 respectively. In some embodiments, the floating foundation employs single-point mooring, meaning it is equipped with one fixed pile 30 and one anchor chain 50 corresponding to the floating foundation, and the second connecting frame 22 has one mooring structure 221. This reduces the number of seabed fixed piles 30 and anchor chains 50, which helps to reduce material and construction costs.

[0092] In the above steps, by setting up fixed piles 30 on the seabed 40 and connecting the second connecting frame 22 to the fixed piles 30 via anchor chains 50, the floating foundation is restricted to a predetermined area.

[0093] In some embodiments of the floating foundation construction method, the top wall 15 of the float 1 is provided with a first connecting hole 13, and the first connecting frame 21 is provided with a first prestressed tendon 14.

[0094] like Figure 4 As shown, the first connecting hole 13 can refer to the hole-like structure provided on the top wall 15 of the float 1. It is a through hole structure, which allows the first prestressing tendon 14 to be inserted, so as to facilitate the connection between the first prestressing tendon 14 and the top wall 15 of the float 1.

[0095] like Figure 5 As shown, the first prestressed tendon 14 can be a structure composed of a single or bundled steel wire, steel strand or steel bar. After it is inserted into the first connecting hole 13 and connected to the top wall 15 of the float 1, it can firmly connect the top wall 15 of the float 1 and the first connecting frame 21.

[0096] The steps of stacking the first connecting frame 21 on the top wall 15 of each float 1 and connecting it to the top wall 15 of each float 1 include:

[0097] The first connecting frame 21 is stacked on the top wall 15 of each float 1;

[0098] The first prestressed tendon 14 of the first connecting frame 21 is inserted into and connected to the first connecting hole 13 on the top wall 15.

[0099] In the above steps, the first connecting frame 21 is first stacked on the top wall 15 of the float 1, so that the first connecting frame 21 is supported by the float 1, making subsequent installation of the first connecting frame 21 convenient. The first prestressing tendon 14 of the first connecting frame 21 is inserted into and connected to the first connecting hole 13 on the top wall 15. Specifically, the first prestressing tendon 14 of the first connecting frame 21 is first inserted into the first connecting hole 13, and then the first prestressing tendon 14 is connected to the top wall 15 of the float 1 with the first connecting hole 13 using the first connecting member. In some embodiments, the first connecting member can be an anchor with an anchor plate, or a connector or other components, which can be selected by those skilled in the art according to the actual situation.

[0100] In some embodiments, during the process of connecting the first prestressed tendon 14 of the first connecting frame 21 to the first connecting hole 13 on the top wall 15, adhesive material can be applied to the contact positions of the first connecting frame 21 and the top wall 15 respectively. After the first connecting frame 21 and the top wall 15 are connected, the adhesive material can also bond the first connecting frame 21 and the top wall 15 together, which helps to enhance the connection strength between the first connecting frame 21 and the top wall 15.

[0101] In some embodiments of the floating foundation construction method, the side wall 17 of the float 1 is provided with a second connecting hole, and the second connecting frame 22 is provided with a second prestressing tendon.

[0102] The second connecting hole can refer to a hole-like structure provided on the side wall 17 of the float 1. It is a through hole structure that allows the second prestressing tendon to be inserted, facilitating the connection between the second prestressing tendon and the side wall 17 of the float 1.

[0103] The second prestressing tendon can be a structure composed of a single or bundled steel wire, steel strand or steel bar. After it is inserted into the second connecting hole and connected to the side wall 17 of the float 1, it can firmly connect the side wall 17 of the float 1 and the second connecting frame 22.

[0104] The step of placing the second connecting frame 22 between two adjacent floats 1 and connecting it to the sidewall 17 of the two adjacent floats 1 includes:

[0105] The second connecting frame 22 is disposed between two adjacent floats 1, and the second prestressed tendon of the second connecting frame 22 is inserted and connected to the second connecting hole on the side wall 17.

[0106] In the above steps, the second connecting frame 22 is first placed between two adjacent floats 1 to facilitate subsequent installation of the second connecting frame 22. The second prestressing tendon of the second connecting frame 22 is inserted into and connected to the second connecting hole on the side wall 17. Specifically, the second prestressing tendon of the second connecting frame 22 is first inserted into the second connecting hole, and then the second connecting member is used to connect the second prestressing tendon to the side wall 17 of the float 1 with the second connecting hole. In some embodiments, the second connecting member can be an anchor with an anchor plate, or a connector, etc., which can be selected by those skilled in the art according to the actual situation.

[0107] In some embodiments, during the process of connecting the second prestressed tendon of the second connecting frame 22 to the second connecting hole on the side wall 17, adhesive material can be applied to the contact position of the second connecting frame 22 and the side wall 17 respectively. After the second connecting frame 22 and the side wall 17 are connected, the adhesive material can also bond the second connecting frame 22 and the side wall 17, which is beneficial to enhance the connection strength between the second connecting frame 22 and the side wall 17.

[0108] Preferably, such as Figure 6 As shown, the first connecting frame 21 includes a first bracket 211 and a second bracket 212.

[0109] The first support 211 and the second support 212 are both components used to connect with each other to form the first connecting frame 21, making the first connecting frame 21 a split structure. This allows the first connecting frame 21 to be split during hoisting and transportation, which helps to reduce the requirements for hoisting sites and equipment, and also helps to reduce the difficulty of construction.

[0110] In some embodiments of the floating foundation construction method, before the step of stacking the first connecting frame 21 on the top wall 15 of each float 1 and connecting it to the top wall 15 of each float 1, the method further includes:

[0111] The first bracket 211 and the second bracket 212 are connected to each other to form the first connecting frame 21.

[0112] Through the above steps, after transporting the split first bracket 211 and second bracket 212 to the predetermined area, the first bracket 211 and second bracket 212 are then connected to each other to form the first connecting frame 21.

[0113] Preferably, the first connecting frame 21 further includes a reinforcing bracket 213, which is connected between the first bracket 211 and the second bracket 212 and can enhance the overall structural strength of the first connecting frame 21.

[0114] In some embodiments, the first support 211, the second support 212 and the reinforcing support 213 can be connected by a third prestressed tendon, which is beneficial to improve the connection strength between the first support 211, the second support 212 and the reinforcing support 213, thereby improving the overall strength of the first connecting frame 21.

[0115] In some embodiments of the floating foundation construction method, the method further includes the following steps prior to the transfer step:

[0116] The prefabrication process involves prefabricating a separate floating body 1, a first support 211, a second support 212, and a second connecting frame 22.

[0117] The prefabrication step can refer to the process of manufacturing each component of the floating foundation separately before the transfer step. Specifically, the float 1, the first support 211, the second support 212, and the second connecting frame 22 are prefabricated in a factory. Since the factory has the advantage of complete equipment compared to the dock or the predetermined area on the sea surface where the floating foundation is set up, it is beneficial to facilitate the fabrication of each component of the floating foundation.

[0118] Specifically, such as Figure 7 As shown, the prefabrication steps include:

[0119] S401, Provide a mold for forming a float 1, a first support 211, a second support 212 and a second connecting frame 22.

[0120] S402, pour concrete slurry into the mold of the float 1, the mold of the first support 211, the mold of the second support 212, and the mold of the second connecting frame 22 respectively, and solidify to form the float 1, the first support 211, the second support 212, and the second connecting frame 22.

[0121] In the above steps, the mold can refer to a structure of cavity 12 that can form the shape of float 1, first support 211, second support 212 and second connecting frame 22, so that after the predetermined material is poured into the mold and solidified, float 1, first support 211, second support 212 and second connecting frame 22 are formed.

[0122] Concrete slurry is poured into the corresponding molds, and after the concrete solidifies, it forms a float 1, a first support 211, a second support 212, and a second connecting frame 22. All of these components are made of concrete, which greatly reduces the cost of the floating foundation compared to steel materials.

[0123] Some embodiments of this application also provide a floating foundation, which can be manufactured using the floating foundation construction method provided by the above-described technical solutions, such as... Figure 8As shown, the floating foundation includes at least two floats 1 and a connecting frame assembly. The at least two floats 1 are spaced apart. Each float 1 has a top wall 15, a bottom wall 16, and a side wall 17 connecting the top wall 15 and the bottom wall 16 along a first direction. The connecting frame assembly includes a first connecting frame 21 and a second connecting frame 22. The first connecting frame 21 is connected to the top wall 15 of each float 1, and the second connecting frame 22 is connected between the side walls 17 of two adjacent floats 1. The first connecting frame 21 is used to connect the tower body 20.

[0124] The float 1, serving as a component floating on the water surface, provides buoyancy to the floating foundation. At least two floats 1 are provided to ensure sufficient buoyancy for the floating foundation to float stably on the water surface. The at least two floats 1 are spaced apart, allowing water flow between them, which helps reduce the impact of water flow on the floating foundation.

[0125] The float 1 has a top wall 15 and a bottom wall 16 spaced apart along a first direction, and a side wall 17 connecting the top wall 15 and the bottom wall 16, forming a sealed structure. This ensures that the float 1 has a certain height when the floating foundation is placed on the water surface, thus providing greater buoyancy. The top wall 15, bottom wall 16, and side wall 17 can all refer to the structures of the float 1, which are interconnected to form a single structure. The first direction can be the vertical direction when the floating foundation is placed on the water surface. When the floating foundation is placed on the water surface, the top wall 15 can refer to the tallest wall structure, and the bottom wall 16 can refer to the wall structure spaced parallel to the top wall 15 along the first direction. The side wall 17 can refer to the wall structure extending along the first direction and connecting the bottom wall 16 and the top wall 15. In some embodiments, the relative positions of the first connecting frame 21 and the second connecting frame 22 can be configured such that when the floating foundation is placed on the water surface, the first connecting frame 21 is above the water surface, and the second connecting frame 22 is below the water surface.

[0126] Preferably, both the float 1 and the connecting frame assembly are concrete structures, which can greatly reduce the cost of the floating foundation.

[0127] In some embodiments, the float 1 is provided with a cavity 12, and ballast material is provided at the bottom of the cavity 12.

[0128] The cavity 12 can refer to the space formed within the float 1, making the float 1 a hollow structure, thereby enabling the float 1 to provide sufficient buoyancy. Preferably, ballast material is provided at the bottom of the cavity 12. The ballast material has a preset mass and can provide damping for the float 1, which helps to reduce the swaying of the floating foundation in the water and improve the stability of the floating foundation.

[0129] In some embodiments, the ballast material is configured as a fluid, and the second connecting frame 22 is provided with a connecting channel that connects the cavities 12 of two adjacent floats 1.

[0130] The connecting channel can refer to the perforated structure provided in the second connecting frame 22, which makes the second connecting frame 22 a hollow structure. When the second connecting frame 22 is connected between the side walls 17 of two adjacent floats 1, the connecting channel connects the cavities 12 of the two adjacent floats 1. By setting the ballast material to be fluid, the ballast material can flow between the two adjacent floats 1 through the connecting channel of the second connecting frame 22, which helps to keep the ballast material between each float 1 balanced and helps to reduce the possibility of the floating foundation tilting.

[0131] In some embodiments, such as Figure 9 As shown, a partition 11 is provided in the cavity 12, which divides the cavity 12 into at least two independently arranged compartments 121.

[0132] The partition 11 can refer to a plate-shaped component with a certain thickness, which is disposed in the cavity 12 and sealed to the inner wall of the cavity 12, dividing the cavity 12 into at least two independently disposed compartments 121. Preferably, the partition 11 divides the cavity 12 into at least two independent compartments 121 of equal size, and each compartment 121 is independent of each other. When the float 1 is partially damaged and some compartments 121 are flooded, the float 1 still has buoyancy and will not sink, which helps to improve the safety of the floating foundation.

[0133] Preferably, the float 1 is configured as a cuboid structure, and both ends of the float 1 are configured as conical structures.

[0134] The float 1 is configured as a cuboid structure, which eliminates the need for a special template during manufacturing, thus reducing template production costs and lowering the overall cost of the floating foundation. In some embodiments, the float 1 can also be configured as a cylindrical structure, and those skilled in the art can customize the structural shape of the float 1 according to the specific circumstances.

[0135] Preferably, both ends of the float 1 are designed as cone structures, so that when water flows over the float 1, the impact force on the float 1 is small, which is beneficial to improving the stability of the floating foundation.

[0136] The connecting frame assembly can refer to the frame assembly used to connect the floating bodies 1, which includes a first connecting frame 21 and a second connecting frame 22. The first connecting frame 21 is connected to the top wall 15 of each floating body 1 of the floating foundation, and the second connecting frame 22 is connected between the side walls 17 of two adjacent floating bodies 1. The first connecting frame 21 is used to connect the tower body 20, so that the tower body 20 can be connected to the top wall 15 of the floating body 1 through the first connecting frame 21. When the floating foundation is placed on the water surface, the load transmitted from the tower body 20 in the vertical direction is transferred to the entire side wall 17 after acting on the top wall 15 of the floating body 1, rather than acting on a certain part of the side wall 17 of the floating body 1, thereby reducing the concentration of load on the side wall 17 and improving the stress condition of the floating foundation.

[0137] In some embodiments, an overflow port 23 is formed in the first connecting frame 21, and the overflow port 23 is polygonal in shape.

[0138] The overflow port 23 can refer to the space within the first connecting frame 21, where no components are installed. Since the first connecting frame 21 is connected to the top wall 15 of the float 1, when the floating foundation is placed on the water surface, the first connecting frame 21 is above the water surface. The overflow port 23 is used to allow airflow or splashing water waves on the water surface to pass through, which helps to reduce the effect of airflow or water waves on the floating foundation, helps the floating foundation to remain stable, and reduces the possibility of the floating foundation overturning.

[0139] Specifically, the first connecting frame 21 includes at least two spaced first supports 211, at least two spaced second supports 212, and a plurality of reinforcing supports 213. The two ends of the first supports 211 are respectively connected to two adjacent second supports 212, and the reinforcing supports 213 are connected between the first supports 211 and the second supports 212 to form an outlet 23.

[0140] At least two first supports 211 are provided, and at least two first supports 211 are arranged in parallel and spaced apart. At least two second supports 212 are provided, and at least two second supports 212 are arranged in parallel and spaced apart. The two ends of the first supports 211 are respectively connected between two adjacent second supports 212, so that the first connecting frame 21 formed by the connection of the first supports 211 and the second supports 212 is a rectangular structure, which facilitates the connection of the first connecting frame 21 with at least two floats 1.

[0141] The reinforcing bracket 213 is connected between the first bracket 211 and the second bracket 212, which can enhance the structural strength of the first connecting frame 21 and the load-bearing capacity of the first connecting frame 21, so that the first connecting frame 21 can bear the load transmitted from the tower body 20.

[0142] In some embodiments, the second support 212 is arranged along the length of the float 1, and the two ends of the second support 212 are connected to two first supports 211 respectively stacked on the two floats 1, and the tower body 20 is connected to the first support 211.

[0143] The second support 212 is arranged along the length of the float 1, so that the entire second support 212 is completely stacked on the top wall 15 of the float 1. The two ends of the second support 212 are respectively connected to the two first supports 211 stacked on each float 1, which helps to improve the connection strength between the first connecting frame 21 and the top wall 15 of the float 1. The tower body 20 is connected to the first support 211, so that the tower body 20 is located in the middle of at least two floats 1, which helps to maintain the balance of the floating foundation and improve the stability of the floating foundation.

[0144] Some embodiments of this application also provide a wind turbine generator set, such as... Figure 10 As shown, it includes a floating foundation, a tower body 20, and a fixed pile 30 provided by any of the above technical solutions. The tower body 20 is connected to the first connecting frame 21 of the floating foundation. The fixed pile 30 is connected to the seabed 40. The second connecting frame 22 of the floating foundation is connected to the fixed pile 30 through an anchor chain 50.

[0145] The tower body 20 can refer to the tower frame composed of multiple tower sections in a wind turbine generator set. It is used to support heavy structures such as the nacelle, generator, and rotor. It is connected to the first connecting frame 21 of the floating foundation and can withstand large loads and transfer the loads to the floating foundation.

[0146] The fixed pile 30 connected to the seabed 40 can provide a large force to the floating foundation through the anchor chain 50, so that the floating foundation is moored in a predetermined area. Specifically, at least one mooring structure 221 is provided on the second connecting frame 22 of the floating foundation. The mooring structure 221 is connected to the fixed pile 30 through the anchor chain 50 to achieve mooring of the floating foundation.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for constructing a floating foundation, characterized in that, Includes the following steps: The prefabrication step involves prefabricating a float, a first support, a second support, and a second connecting frame that are separately configured. The prefabrication step includes: providing molds for forming the float, the first support, the second support, and the second connecting frame; pouring concrete slurry into the molds for the float, the first support, the second support, and the second connecting frame, respectively, and solidifying them to form the float, the first support, the second support, and the second connecting frame. The transfer step involves transferring the separately configured float, the first connecting frame, and the second connecting frame to a predetermined area where a floating foundation is installed. The float has a top wall and a bottom wall arranged opposite each other along a first direction, as well as a side wall connecting the top wall and the bottom wall. The first connecting frame includes a first support and a second support. The assembly step involves connecting the top walls of two adjacent floats using the first connecting frame, and connecting the side walls of two adjacent floats using the second connecting frame. The assembly steps include: placing at least two of the floats on the water surface of the predetermined area; connecting the first support and the second support to form the first connecting frame; stacking the first connecting frame on the top wall of each of the floats and connecting it to the top wall of each of the floats; and placing the second connecting frame between two adjacent floats and connecting it to the side walls of the two adjacent floats.

2. The floating foundation construction method according to claim 1, characterized in that, It also includes a mooring step, which includes: Fixed piles were installed on the seabed in the predetermined area; The second connecting frame is connected to the fixed pile by an anchor chain.

3. The floating foundation construction method according to claim 1, characterized in that, The top wall of the float is provided with a first connecting hole, and the first connecting frame is provided with a first prestressing rib. The step of stacking the first connecting frame on the top wall of each of the floats and connecting it to the top wall of each of the floats includes: The first connecting frame is stacked on the top wall of each of the floats; The first prestressed tendon of the first connecting frame is inserted into and connected to the first connecting hole on the top wall.

4. The floating foundation construction method according to claim 1, characterized in that, The side wall of the float is provided with a second connecting hole, and the second connecting frame is provided with a second prestressing rib. The step of placing the second connecting frame between two adjacent floats and connecting it to the sidewalls of the two adjacent floats includes: The second connecting frame is placed between two adjacent floats, and the second prestressed tendon of the second connecting frame is inserted and connected to the second connecting hole on the side wall.

5. A floating foundation, characterized in that... The floating foundation is constructed using the floating foundation construction method as described in any one of claims 1 to 4, wherein the floating foundation comprises: At least two floats are provided at intervals, and the floats have opposing top walls, bottom walls and side walls connecting the top walls and the bottom walls along a first direction; The connecting frame assembly includes a first connecting frame and a second connecting frame. The first connecting frame is connected to the top wall of each of the floats, and the second connecting frame is connected between the side walls of two adjacent floats. The first connecting frame is used to connect the tower body. The first connecting frame includes at least two spaced-apart first supports and at least two spaced-apart second supports. The two ends of the first supports are respectively connected to two adjacent second supports.

6. The floating foundation according to claim 5, characterized in that, The first connecting frame has an overflow port, which is polygonal in shape.

7. The floating foundation according to claim 6, characterized in that, The first connecting frame also includes a plurality of reinforcing brackets, which are connected between the first bracket and the second bracket to form the flow port.

8. The floating foundation according to claim 5, characterized in that, The second support is arranged along the length of the float, and the two ends of the second support are respectively connected to the two first supports stacked on each of the floats. The tower body is connected to the first support.

9. The floating foundation according to claim 5, characterized in that, The float has a cavity, and ballast material is placed at the bottom of the cavity.

10. The floating foundation according to claim 9, characterized in that, The ballast material is configured as a fluid, and the second connecting frame is provided with a connecting channel that connects the cavities of two adjacent floats.

11. The floating foundation according to claim 9, characterized in that, The cavity is provided with a partition, which divides the cavity into at least two independently configured compartments.

12. The floating foundation according to any one of claims 5 to 11, characterized in that, The float is configured as a cuboid structure, with both ends of the float being set as conical structures.

13. A wind turbine generator set, characterized in that, include: The floating foundation as described in any one of claims 5 to 12; The tower body is connected to the first connecting frame of the floating foundation; A fixed pile is attached to the seabed, and the second connecting frame of the floating foundation is connected to the fixed pile via an anchor chain.

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