Clamped floating type offshore wind power foundation platform

Abstract

The invention relates to the technical field of offshore wind power generation, and discloses a clamped floating type offshore wind power foundation platform which comprises a floating structure and a clamped structure. The fixed supporting structure is located below the floating structure and arranged underwater in a submerged mode, and the fixed supporting structure is suitable for providing bearing capacity and anti-overturning capacity for the floating structure. The floating structure floats on the water surface so as to be suitable for installing and placing wind power equipment, and the anti-tilting capacity can be improved through the water plane and the gravity center-buoyancy center height difference. The fixed supporting structure limits the horizontal displacement of the floating structure, adjusts the overall gravity center of the offshore wind power foundation and provides the anti-overturning capacity. The clamped floating type offshore wind power foundation platform has multiple composite stability sources, anchor chain mooring structures are reduced on the premise that the foundation stability is guaranteed, then the occupied area is reduced, the composite stability design is adopted, the situation that the structure size is too large due to a single stability source is avoided, steel materials are further reduced, the weight of the structure is reduced, and the cost is reduced. Therefore, the overall cost and the cost per kilowatt-hour are greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to a fixed-support floating offshore wind power foundation platform. Background Art

[0002] As the global demand for clean energy grows, wind power generation has attracted increasing attention as a sustainable energy solution. As an important component of this, offshore wind power has attracted much attention due to its higher wind energy efficiency and smaller environmental impact. As offshore wind farms gradually move deeper into the sea, fixed offshore wind power is gradually losing its technical advantages due to the excessive amount of steel used in underwater structures, and floating wind towers have become a more ideal choice.

[0003] Existing traditional floating foundations usually have only a single source of anti-overturning capacity, such as barges and semi-subs that rely on waterplane area, spars that rely on ballast, and tension leg foundations (TLPs) that rely on tendon support structures. However, a single source of stability will make the floating structure larger in size. For example, a larger waterplane area of ​​the floating body will lead to an increase in the amount of steel used in the floating body; the improved positioning capability of the catenary mooring also requires more steel; and the Spar platform requires a longer pontoon and a larger total amount of ballast to ensure the height difference between the center of gravity and the center of buoyancy. These platform forms all require an increase in the amount of steel used in the floating body or mooring structure to provide anti-overturning moment, which greatly limits the optimization space for steel use and the prospects for commercial promotion. At the same time, the large volume and weight problems caused by the large amount of steel used also lead to challenges in the installation of wind farms. In addition, the catenary mooring form increases the footprint of a single wind turbine, further increasing the cost of electricity for wind farms. Summary of the invention

[0004] In view of this, the present invention provides a fixed-support floating offshore wind power foundation platform to solve the problems in the prior art of large volume and weight caused by the amount of steel used, resulting in high cost of wind farms, complicated installation process, and the catenary mooring form increases the footprint of a single wind turbine, thereby increasing the cost of electricity of the wind farm.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows: The present invention provides a fixed-support floating offshore wind power foundation platform, comprising: a floating structure and a fixed-support structure; the fixed-support structure is rigidly connected to the floating structure, the floating structure floats on the water surface to be suitable for installing and placing wind power equipment, the fixed-support structure is located below the floating structure and is submerged underwater, and the fixed-support structure is suitable for providing bearing capacity and anti-overturning capacity for the floating structure; the fixed-support structure comprises a fixed-support base and a connecting part; one end of the connecting part is connected to the fixed-support base, and the other end of the connecting part is connected to the floating structure, a plurality of cavities are arranged inside the fixed-support base, and a plurality of openings are opened at one end of the fixed-support base away from the connecting part, and the openings are communicated with the cavities.

[0006] It has the following advantages: the floating structure floats on the water surface to be suitable for installing and placing wind power equipment, and the anti-tilting ability can be improved through the waterline and the height difference between the center of gravity and the center of buoyancy; the fixed support structure limits the horizontal displacement of the floating structure, adjusts the overall center of gravity of the offshore wind power foundation, and provides anti-tilting ability. The fixed support floating offshore wind power foundation platform has multiple composite stability sources. Under the premise of ensuring the stability of the foundation, it reduces the anchor chain mooring structure, thereby reducing the floor space, and adopts a composite stability design to avoid the excessive size of the structure caused by a single stability source, further reducing steel materials and reducing the weight of the structure, thereby significantly reducing the overall cost and the cost per kilowatt-hour.

[0007] According to some embodiments of the present invention, the connecting portion is a single column structure, a pipe frame structure or a truss structure.

[0008] According to some embodiments of the present invention, the fixed support base includes an outer cylinder, an inner bulkhead concentrically arranged with the outer cylinder, and a first partition vertically arranged and connected to the outer cylinder and the inner bulkhead. The first partition is provided in plurality and is evenly distributed along the circumference of the inner bulkhead to separate and form a plurality of the cavities. The outer cylinder is a cylindrical structure with one end open and the other end closed.

[0009] According to some embodiments of the present invention, the floating structure includes a connected installation platform and a buoyancy tank, the bottom of the installation platform is rigidly connected to the buoyancy tank, the installation platform is suitable for fixing the wind power equipment, and the bottom of the buoyancy tank is rigidly connected to the fixed structure.

[0010] According to some embodiments of the present invention, the buoyancy tank includes a tank body and a connecting section, one end of the connecting section is connected to the tank body, and the other end is connected to the mounting platform, the internal cavity of the connecting section is connected to the tank body, a plurality of second partitions are horizontally arranged in the tank body, the second partitions are suitable for dividing the interior of the tank body into a plurality of chambers, the plurality of chambers are connected in sequence from top to bottom, a plurality of water holes are provided at the bottom of the tank body, a plurality of ventilation holes are provided on the side wall of the connecting section, and a plurality of connecting holes are provided on the second partitions, so that the plurality of chambers are connected in sequence.

[0011] According to some embodiments of the present invention, the vent holes are opened on the side wall of the cabin body, and are arranged at intervals in the vertical direction, and are arranged corresponding to each of the chambers to be suitable for connecting each of the chambers.

[0012] According to some embodiments of the present invention, the fixed support structure, the buoyancy chamber and the installation platform are concrete structures or steel-concrete structures.

[0013] According to some embodiments of the present invention, the mounting platform includes a central column, a side column, and a bypass piece connecting the central column and the side columns, the lower end of the central column is rigidly connected to the fixed support structure, a plurality of side columns are provided and are evenly arranged along the circumference of the central column, one end of the bypass piece is connected to the central column, and the other end is connected to the side column.

[0014] According to some embodiments of the present invention, the number of the side pillars is consistent with that of the bypass pieces, the distances between the axes of the plurality of side pillars and the central axis of the central pillar are consistent, the plurality of bypass pieces are horizontally arranged, and the angles formed between two adjacent bypass pieces are consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a fixed-support floating offshore wind power foundation platform provided in some embodiments of the present invention; Figure 2 A schematic diagram of a three-dimensional structure of a fixed support structure provided in some embodiments of the present invention; Figure 3 Another schematic diagram of a three-dimensional structure of a fixed support structure provided in some embodiments of the present invention; Figure 4 Schematic diagram of the planar structure of the clamped structure provided in some embodiments of the present invention.

[0017] Description of reference numerals: 1. Fixed structure; 2. Floating structure; 11. Fixed base; 12. Connecting part; 111. Outer cylinder; 112. Inner bulkhead; 113. First bulkhead; 21. Mounting platform; 22. Buoyancy tank; 211. Center column; 212. Side column; 213. Bypass piece; 221. Tank; 222. Connecting section; 223. Second bulkhead. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Reference Figure 1As shown, the present invention provides a fixed-support floating offshore wind power foundation platform, including: a floating structure 2 and a fixed-support structure 1; the fixed-support structure 1 is rigidly connected to the floating structure 2, the floating structure 2 floats on the water surface to be suitable for installing and placing wind power equipment, the fixed-support structure 1 is located below the floating structure 2 and submerged underwater, and the fixed-support structure 1 is suitable for providing bearing capacity and anti-overturning capability for the floating structure 2.

[0023] Specifically, the floating structure 2 floats on the water surface to be suitable for installing and placing wind power equipment, and the anti-tilting ability can be improved through the waterline and the height difference between the center of gravity and the center of buoyancy; the fixed support structure 1 limits the horizontal displacement of the floating structure 2, adjusts the overall center of gravity of the offshore wind power foundation, and provides anti-tilting ability. The fixed support floating offshore wind power foundation platform has multiple composite stability sources. Under the premise of ensuring the stability of the foundation, the anchor chain mooring structure is reduced, thereby reducing the floor space, and the composite stability design is used to avoid the excessive size of the structure caused by a single stability source, further reducing steel materials and reducing the weight of the structure, thereby significantly reducing the overall cost and the cost per kilowatt-hour.

[0024] It can be understood that, in the present invention, according to the actual installation position of the wind power equipment and environmental conditions, the waterplane area of ​​the floating structure 2, the restoring torque generated by the height difference between the center of buoyancy and the center of gravity, and the anti-overturning moment provided by the fixed structure 1 are relied upon to resist the overturning bending moment generated by the external load. The external load mainly includes the overturning moment generated by external loads such as wind, waves and water flow, so that the structure will not capsize when subjected to the overturning moment and the roll angle is within the specification limit.

[0025] Furthermore, in order to meet the vertical bearing stability, that is, the buoyancy and gravity balance of the whole structure, the fixed support structure 1 will be subjected to the uplift load, which is transmitted to the seabed soil through the outer cylinder 111, the inner bulkhead 112, the first partition 113 and the negative pressure generated in the closed cylindrical structure. The seabed soil in the uplift state can be equivalent to the bottom ballast of the structure, which effectively balances the buoyancy and gravity of the whole structure and lowers the center of gravity of the whole structure, so that the restoring moment generated by the height difference between the buoyancy center and the center of gravity is further increased, and the overall anti-overturning ability is enhanced. This makes full use of the uplift bearing capacity of the fixed support foundation and avoids the shortcomings of the column-type structure, such as the need for a large amount of bottom ballast and the restriction on the water depth.

[0026] Reference Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the fixed support structure 1 includes a fixed support base 11 and a connecting portion 12; one end of the connecting portion 12 is connected to the fixed support base 11, and the other end of the connecting portion 12 is connected to the floating structure 2, and the connecting portion 12 is a single column structure, a conductor frame structure or a truss structure.

[0027] Specifically, the fixed support structure 1 is composed of a fixed support base 11 and a connection part 12. The fixed support base 11 is located at the bottom and is connected to the floating structure 2 through the connection part 12. The fixed support base 11 is mainly used to provide bottom support for the platform and can be anchored according to seabed conditions. The connection part 12 can also effectively transfer the load of the wind power equipment and the upper structure to the fixed support base 11 at the bottom, thereby ensuring the stability of the entire platform under different loads.

[0028] Reference Figures 2 to 4 As shown, specifically, the connection part 12 is a single-column steel pipe structure or supported by multiple circular steel pipes. The two ends of the connection part 12 are rigidly connected to the fixed support base 11 and the buoyancy tank 22 respectively. The top of the connection part 12 is passed through the buoyancy tank 22 to extend to connect with the bottom of the installation platform 21. In the buoyancy tank 22, the connection part 12 and the upper and lower end surfaces of the buoyancy tank 22 are provided with stiffening ribs for anchoring to enhance the connection strength and improve the reliability of the structure. The bottom of the connection part 12 is fixedly connected to the top of the fixed support base 11 through a flange.

[0029] It can be understood that the function of the connecting section 222 is to transfer external environmental loads such as wind, waves and currents. The connecting portion 12 can be made of steel tube concrete material to effectively reduce the use of steel. The connecting portion 12 has the advantages of both rigid connection to transfer loads and relatively small hydrodynamic loads. In addition, single-column, conductor frame or truss structure designs that can achieve rigid connection can be used as the connecting portion 12.

[0030] Reference Figure 3 As shown, in some embodiments of the present invention, a plurality of cavities are disposed inside the fixing base 11 , and a plurality of openings are formed at one end of the fixing base 11 away from the connecting portion 12 , and the openings are communicated with the cavities.

[0031] In some embodiments of the present invention, the fixed base 11 includes an outer cylinder 111, an inner bulkhead 112 concentrically arranged with the outer cylinder 111, and a first partition 113 vertically connecting the outer cylinder 111 and the inner bulkhead 112. The first partition 113 is provided in plurality and is evenly distributed along the circumference of the inner bulkhead 112 to separate and form a plurality of cavities. The outer cylinder 111 is a cylindrical structure with one end open and the other end closed.

[0032] Specifically, the outer cylinder 111, the inner bulkhead 112 and the first partition 113 are all made of steel plate structure. The inner bulkhead 112 is arranged in the outer cylinder 111. The outer cylinder 111 and the inner bulkhead 112 are both cylindrical and concentrically arranged. The first partition 113 is vertically placed between the outer cylinder 111 and the inner bulkhead 112. A plurality of first partitions 113 are arranged and are arranged at intervals along the circumference of the inner bulkhead 112, so as to evenly divide the space between the outer cylinder 111 and the inner bulkhead 112 to form a plurality of cavities. The arrangement of the multiple cavities makes the structure of the fixed base 11 compact. The first partition 113 forms ribs, which are suitable for evenly distributing the resistance and avoiding the concentration of the resistance on one side to enhance the structural strength.

[0033] It can be understood that one end of the outer cylinder 111 is open and the other end is closed, and the opening is far away from the connecting part 12. During the installation process, by inserting the opening downward below the mud surface, the soil enters the cavity, so that the gravity of the fixed support base 11 is increased, the center of gravity is lowered, and the height difference between the center of buoyancy and the center of gravity of the structure is further increased, thereby improving the anti-overturning ability.

[0034] In some embodiments of the present invention, the floating structure 2 includes a connected installation platform 21 and a buoyancy cabin 22, the bottom of the installation platform 21 is rigidly connected to the buoyancy cabin 22, the installation platform 21 is suitable for fixing wind power equipment, and the bottom of the buoyancy cabin 22 is rigidly connected to the fixed structure 1.

[0035] Reference Figure 4 As shown, in some embodiments of the present invention, the buoyancy tank 22 includes a cabin 221 and a connecting section 222, one end of the connecting section 222 is connected to the cabin 221, and the other end is connected to the mounting platform 21, the internal cavity of the connecting section 222 is connected to the cabin 221, and a plurality of second partitions 223 are horizontally arranged in the cabin 221, the second partitions 223 are suitable for partitioning the interior of the cabin 221 into a plurality of chambers, and the plurality of chambers are connected in sequence from top to bottom, a plurality of water holes are provided at the bottom of the cabin 221, a plurality of ventilation holes are provided on the side wall of the connecting section 222, and a plurality of connecting holes are provided on the second partition 223, so that the plurality of chambers are connected in sequence.

[0036] The buoyancy chamber 22 is arranged at the upper end of the connection part 12 and is rigidly connected to the bottom of the installation platform 21. During transportation, the buoyancy chamber 22 adjusts its internal water pressure to adjust the buoyancy for easy transportation; after the assembly is confirmed, the buoyancy chamber 22 is filled with mud material with a density greater than seawater to ensure stability. The setting of the buoyancy chamber 22 can ensure that the platform has adjustable buoyancy and balance capabilities under different working conditions.

[0037] Specifically, the connecting section 222 is used to connect the installation platform 21 and the cabin 221. A plurality of second partitions 223 are horizontally arranged in the cabin 221 to divide the cabin 221 into a plurality of chambers. The plurality of chambers are arranged from top to bottom. A plurality of connecting holes are arranged on the second partition 223 to connect the plurality of chambers. A water hole is provided at the bottom of the cabin 221, and an air vent is provided on the side wall of the connecting section 222. During transportation, the water hole and the air vent are both opened, and the floating amount of the buoyancy cabin 22 is controlled by controlling the air intake and water intake, so as to facilitate transportation. When the buoyancy chamber 22 needs to dive, the buoyancy chamber 22 is pressed downward, water enters the chamber from the water through hole, and the air in the chamber is discharged from the vent hole under the pressure of the liquid, thereby increasing the weight of the buoyancy chamber 22 and causing the buoyancy chamber 22 to dive; when the buoyancy chamber 22 needs to float, air is ventilated to the vent hole so that the air squeezes and discharges the liquid in the chamber, thereby reducing the mass of the buoyancy chamber 22 and causing the buoyancy chamber 22 to float. The water volume in the buoyancy chamber 22 can be controlled through the water through hole and the vent hole, which is convenient for controlling the posture and transportation.

[0038] It is understandable that after the fixed support structure 1 is transported to the designated location, the water holes are blocked, grouting is performed from the air holes, and ballast such as mortar and cement is poured in to increase the weight of the buoyancy chamber 22, so that the buoyancy chamber 22 sinks, and the fixed support base 11 is inserted below the mud surface, so that the fixed support structure 1 is placed vertically, and ballast such as mortar and cement is poured into the buoyancy chamber 22 to meet the vertical bearing capacity requirements. After the fixed support structure 1 is installed and fixed, the installation platform 21 is fixed on the fixed support structure 1 to realize the installation of the fixed support floating offshore wind power foundation platform.

[0039] In some embodiments of the present invention, the vent holes are opened on the side wall of the cabin body 221 and are arranged at intervals in the vertical direction and are arranged corresponding to each chamber so as to be suitable for connecting each chamber.

[0040] Specifically, the second partition 223 is used to separate the interior of the cabin 221 into multiple chambers, thereby improving the structural strength and avoiding the use of a single chamber, which causes a dent when the exterior of the buoyancy chamber 22 is hit. Ventilation holes are provided on the side wall of the buoyancy chamber 22, and the multiple vents are evenly distributed along the vertical direction of the buoyancy chamber 22, so that each chamber is connected to the outside, thereby realizing the buoyancy control of a single chamber and improving the convenience of operation.

[0041] In some embodiments of the present invention, the fixed base 11, the buoyancy chamber 22 and the installation platform 21 are steel structures, concrete structures or steel-concrete structures.

[0042] Specifically, in order to reduce the use of steel structures, the fixed base 11, the buoyancy chamber 22, the connection part 12 and / or the installation platform 21 can adopt a concrete structure or a steel-concrete structure to ensure structural strength while reducing costs.

[0043] In some embodiments of the present invention, the mounting platform 21 includes a central column 211, a side column 212, and a bypass piece 213 connecting the central column 211 and the side column 212. The lower end of the central column 211 is rigidly connected to the fixed support structure 1. A plurality of side columns 212 are provided and are evenly arranged along the circumference of the central column 211. One end of the bypass piece 213 is connected to the central column 211, and the other end is connected to the side column 212.

[0044] Specifically, the installation platform 21 provides a restoring moment by relying on the waterline area. The installation platform 21 is subjected to uneven buoyancy, thereby generating a restoring moment, which is the first source of composite stability. In addition, the central column 211 also serves as a connecting section 222 of the upper structure such as the nacelle and the tower, transmitting the aerodynamic load from the tower and the nacelle.

[0045] Specifically, the floating structure composed of the installation platform 21 and the buoyancy tank 22 has a certain displacement, so that the buoyancy center of the overall structure is close to the floating structure 2. Due to the seabed soil driven by the uplift of the fixed structure 1, the center of gravity of the overall structure is biased downward. The height difference formed by the center of buoyancy and the center of gravity makes the overall structure have a higher anti-overturning ability, which is the second source of composite stability. In addition, the fixed base 11 of the fixed structure 1 will also provide anti-overturning ability. Therefore, the first source of composite stability, the second source, and the anti-overturning ability provided by the fixed base 11 constitute the composite stability of the fixed floating offshore wind power foundation platform, which makes full use of the composite characteristics of the structure and does not require additional mooring anchor chains, thereby reducing the cost per kilowatt-hour.

[0046] In some embodiments of the present invention, the number of side columns 212 and bypass pieces 213 is consistent, the distance between the axes of the multiple side columns 212 and the central axis of the central column 211 is consistent, the multiple bypass pieces 213 are all horizontally arranged, and the angles formed between two adjacent bypass pieces 213 are consistent.

[0047] Specifically, the installation platform 21 is a multi-column semi-submersible platform. The bypass piece 213 is horizontally arranged, one end of the bypass piece 213 is connected to the side column 212, and the other end is connected to the center column 211, so that the distance between the axis of the side column 212 and the axis of the center column 211 are consistent, so as to ensure the stability and strength of the structure.

[0048] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A fixed floating offshore wind power foundation platform, It is characterized in that include: A floating structure (2) and a fixed support structure (1); the fixed support structure (1) is rigidly connected to the floating structure (2); the floating structure (2) floats on the water surface to be suitable for installing and placing wind power equipment; the fixed support structure (1) is located below the floating structure (2) and is submerged in the water; the fixed support structure (1) is suitable for providing bearing capacity and anti-overturning capacity for the floating structure (2); The fixed support structure (1) comprises a fixed support base (11) and a connecting portion (12); one end of the connecting portion (12) is connected to the fixed support base (11), and the other end of the connecting portion (12) is connected to the floating structure (2); a plurality of cavities are provided inside the fixed support base (11); and a plurality of openings are provided at one end of the fixed support base (11) away from the connecting portion (12), and the openings are communicated with the cavities.

2. The fixed floating offshore wind power foundation platform according to claim 1, It is characterized in that The connecting portion (12) is a single column structure, a pipe frame structure or a truss structure.

3. The fixed floating offshore wind power foundation platform according to claim 1, It is characterized in that The fixed support base (11) comprises an outer cylinder (111), an inner bulkhead (112) arranged concentrically with the outer cylinder (111), and a first partition (113) arranged vertically and connected to the outer cylinder (111) and the inner bulkhead (112), wherein a plurality of first partitions (113) are provided and are evenly distributed along the circumference of the inner bulkhead (112) to separate and form a plurality of cavities, and the outer cylinder (111) is a cylindrical structure with one end open and the other end closed.

4. The fixed floating offshore wind power foundation platform according to claim 2, It is characterized in that The floating structure (2) comprises a mounting platform (21) and a buoyancy chamber (22) which are connected to each other, the bottom of the mounting platform (21) being rigidly connected to the buoyancy chamber (22), the mounting platform (21) being suitable for fixing the wind power equipment, and the bottom of the buoyancy chamber (22) being rigidly connected to the fixed support structure (1).

5. The fixed floating offshore wind power foundation platform according to claim 4, It is characterized in that The buoyancy tank (22) comprises a tank body (221) and a connecting section (222); one end of the connecting section (222) is connected to the tank body (221), and the other end is connected to the mounting platform (21); an internal cavity of the connecting section (222) is connected to the tank body (221); a plurality of second partitions (223) are horizontally arranged in the tank body (221); the second partitions (223) are suitable for partitioning the interior of the tank body (221) into a plurality of chambers; the plurality of chambers are sequentially connected from top to bottom; a plurality of water holes are arranged at the bottom of the tank body (221); a plurality of air holes are arranged on the side wall of the connecting section (222); and a plurality of connecting holes are arranged on the second partition (223), so that the plurality of chambers are sequentially connected.

6. The fixed floating offshore wind power foundation platform according to claim 5, It is characterized in that The vent holes are opened on the side wall of the cabin (221), and are arranged at intervals in the vertical direction, and are arranged corresponding to each of the chambers, so as to be suitable for connecting each of the chambers.

7. The fixed floating offshore wind power foundation platform according to claim 4, It is characterized in that The fixed support structure (1), the buoyancy chamber (22) and the installation platform (21) are steel structures, concrete structures or steel-concrete structures.

8. The fixed floating offshore wind power foundation platform according to claim 4, It is characterized in that The mounting platform (21) comprises a central column (211), a side column (212), and a bypass piece (213) connecting the central column (211) and the side column (212); the lower end of the central column (211) is rigidly connected to the fixed support structure (1); a plurality of side columns (212) are provided and are evenly arranged along the circumference of the central column (211); one end of the bypass piece (213) is connected to the central column (211), and the other end is connected to the side column (212).

9. The fixed floating offshore wind power foundation platform according to claim 8, It is characterized in that The number of the side columns (212) and the bypass pieces (213) is the same, the plurality of bypass pieces (213) are arranged horizontally, and the angles formed between two adjacent bypass pieces (213) are the same.

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