CN116292125A

CN116292125A - Marine three-floating-body full-submersible type fan foundation structure

Info

Publication number: CN116292125A
Application number: CN202310267808.5A
Authority: CN
Inventors: 祝磊; 陈宇; 王美; 孙海林
Original assignee: Beijing University of Civil Engineering and Architecture
Current assignee: Beijing University of Civil Engineering and Architecture
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-06-23
Anticipated expiration: 2043-03-14

Abstract

The invention relates to the technical field of offshore wind power generation, in particular to an offshore three-floating-body full-submerged fan foundation structure, which comprises a floating body structure, wherein the floating body structure comprises upright posts, three foundation posts, a plurality of lateral floating cylinders, a lower supporting rod and an upper supporting rod; the base columns are consistent with the upright columns in length direction, the three base columns are distributed in a circumferential array around the upright columns, and two adjacent base columns are connected through a lateral pontoon; the upper part of each foundation column is connected with the upper part of the upright column through an upper supporting rod, and the lower part of each foundation column is connected with the lower part of the upright column through a lower supporting rod. The design of this application, fan foundation structure overall structure is more regular, the atress is more steady even, the wholeness is strong, lies in below the surface of water when its operating condition, and fan foundation structure's water plane area is little for wave load greatly reduced can reduce the fan and move by the degree respectively under the wave action, promotes wind-powered electricity generation platform's overall rigidity and stability.

Description

Marine three-floating-body full-submersible type fan foundation structure

Technical Field

The invention relates to the technical field of offshore wind power generation, in particular to an offshore three-floating-body full-submersible type fan foundation structure.

Background

The limitation of energy resources and the severity of environmental pollution make optimizing energy structures and developing clean energy become the most important work at present, and wind energy is a new clean energy and is widely valued in all countries of the world. The coastline of over 1.8 ten thousand kilometers is owned in China, the available sea area reaches 300 ten thousand square kilometers, the offshore wind energy resources are rich, the limitation of topography and urban planning is avoided, and the utilization and development of wind power are gradually changed from land to sea and the trend of accelerating development is presented because the offshore wind power is usually close to an energy consumption center and the wind resource condition is superior to that of land wind power.

According to the different sea areas and the influence of economic factors, the offshore wind turbine foundation is divided into a fixed foundation and a floating foundation, the offshore fixed wind turbine is high in construction cost, complex in installation process and large in disassembly engineering quantity, and is only suitable for shallow water areas close to the coast. Under the same generating capacity, the floating generating capacity can be improved by 10 to 20 percent compared with a fixed type, so that the exploration of wind energy in the deep sea field is further quickened in all countries of the world, and meanwhile, the floating fans of corresponding types are designed aiming at different sea areas and functions, and deep researches are continuously developed.

At present, the development of the offshore wind power technology in China mainly relates to shallow water fixed fans, but the wind speed is stable enough and the wind energy density is high in deep sea areas, and in addition, the space requirements and the acoustic influence on residents further push the requirements of the offshore wind power field from the shallow water areas to deeper coastal deep water areas. The offshore floating type wind turbine mainly comprises a floating type foundation, an anchoring system, a wind turbine and a tower, wherein the design concept of the floating type foundation is derived from the platform design of the petroleum development technology, and at present, several floating type foundations can be adopted, namely: column, semi-submersible, tension leg platform and barge. However, the existing floating foundation has large motion of each degree under the action of waves, and the overall rigidity and stability of the wind power platform are insufficient.

Disclosure of Invention

The invention aims to provide an offshore three-floating-body full-submerged fan foundation, which can reduce the degree of freedom motion of a fan under the action of waves and improve the overall rigidity and stability of a wind power platform.

The technical scheme of the invention is realized as follows:

the offshore three-floating-body full-submersible type fan foundation structure comprises a floating body structure, wherein the floating body structure comprises upright posts, three foundation posts, a plurality of lateral floating cylinders, a lower supporting rod and an upper supporting rod;

the base columns are consistent with the upright columns in length direction, three base columns are distributed in a circumferential array around the upright columns, and two adjacent base columns are connected through the lateral pontoon;

the upper part of each base column is connected with the upper part of the upright column through the upper supporting rod, and the lower part of each base column is connected with the lower part of the upright column through the lower supporting rod.

When in a working state, the top of the upright post is higher than the top of the base post, and the bottom of the upright post is higher than the bottom of the base post.

Further, three of the upper support bars are distributed around the circumferential array of the upright, and three of the lower support bars are distributed around the circumferential array of the upright.

Further, the number of the lateral buoys is six, two adjacent tops of the base columns are connected through the lateral buoys, and two adjacent bottoms of the base columns are connected through the lateral buoys, and the lateral buoys positioned above and the lateral buoys positioned below are parallel to each other and perpendicular to the base columns.

Further, the base column, the lateral pontoon and the lower supporting rod are hollow structures, the inner cavity of the base column, the inner cavity of the lateral pontoon positioned below and the inner cavity of the lower supporting rod are mutually communicated to form a sealing cavity, and ballast water is filled in the sealing cavity.

Further, a cable guide hole group is arranged at the bottom of each base column, and each cable guide hole group comprises at least one cable guide hole.

Further, the mooring system comprises a plurality of mooring ropes, one ends of the mooring ropes are connected with the base column, and the other ends of the mooring ropes are connected with anchor piles on the sea bottom.

Further, the mooring system further comprises ballast means, each of the mooring lines having the ballast means suspended thereon.

Further, the mooring rope is selected as an anchor chain.

Further, the number of the anchor chains ranges from 3 to 9.

Compared with the prior art, the invention has the beneficial effects that:

the offshore three-floating-body full-submerged fan foundation structure comprises a floating body structure, wherein the floating body structure comprises a stand column, three base columns, a plurality of lateral floating cylinders, a lower supporting rod and an upper supporting rod, when in a working state, the base columns and the stand columns are all vertically arranged, the three base columns are distributed in a circumferential array around the stand columns, two adjacent base columns are connected through the lateral floating cylinders, the upper part of each base column is connected with the upper part of the stand column through the upper supporting rod, and the lower part of each base column is connected with the lower part of the stand column through the lower supporting rod; the utility model discloses a design like this for fan foundation structure overall structure distributes around the center pin circumference array of stand for overall structure is more regular, the atress is more steady even, the wholeness is strong, lies in below the surface of water when its operating condition, and fan foundation structure's water plane area is little, makes wave load greatly reduced, can reduce the fan and move by the degree respectively under the wave action, promotes wind-powered electricity generation platform's whole rigidity and stability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a three-float full submersible wind turbine foundation construction of the present disclosure;

FIG. 2 is a top view of a three-float all-submersible wind turbine foundation of the present disclosure;

FIG. 3 is an arrangement of the mooring system disclosed in the present invention;

fig. 4 shows an arrangement of the anchor chain disclosed in the present invention.

In the figure: (description of the reference numerals)

101-an upright post; 102-base column; 103-side pontoons; 104-a lower support bar; 105-upper support bar; 106-mooring system; 107-mooring lines; 108-a ballast device; 109-a cable guiding hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Example 1

The embodiment provides a full submerged fan foundation structure of three body in sea, has considered corrosion resistance through modified fan foundation to reduced the area of contact of basis and surface of water to a certain extent, reduced the each degree of freedom motion of fan under the wave action, made the platform have good anti-roll stability, heave performance (heave motion) and hydrodynamic performance, specifically as follows:

referring to fig. 1-4, the present embodiment provides an offshore three-floating-body full submersible fan foundation structure, which comprises a floating body structure and a mooring system, wherein the floating body structure comprises a column 101, three foundation columns 102, a plurality of lateral pontoons 103, a lower supporting rod 104 and an upper supporting rod 105, and the column 101, the three foundation columns 102, the lateral pontoons 103, the lower supporting rod 104 and the upper supporting rod 105 can be made of light materials to ensure the buoyancy of seawater during operation. In the preferred embodiment of the present application, the columns 101, the three columns 102, the plurality of lateral pontoons 103, the lower support bar 104 and the upper support bar 105 are all configured as hollow structures that ensure the desired buoyancy in the water.

The base posts 102 are consistent with the length direction of the upright posts 101, the three base posts 102 are distributed in a circumferential array around the upright posts 101, two adjacent base posts 102 are connected through the lateral floating pontoons 103, the included angle between the two adjacent base posts 102 is 120 degrees, the upper end and the lower end of the outer portion of each base post 102 are fixedly connected and mutually communicated through the lateral floating pontoons 103, the inner portions of the base posts 102, the lateral floating pontoons 103 below and the inner cavities of the lower supporting rods 104 are mutually communicated to adjust the water consumption, so that the gravity center of a foundation is reduced, and the integral stability of the floating foundation is improved.

In the operation state in sea water, the top of the upright post 101 is higher than the top of the base post 102, and the bottom of the upright post 101 is higher than the bottom of the base post 102, and the following will describe in detail the operation state in sea water with the fan foundation structure.

The upper part of each base column 102 is connected with the upper part of the upright column 101 through the upper supporting rod 105, and the lower part of each base column 102 is connected with the lower part of the upright column 101 through the lower supporting rod 104.

The included angle between the lower support rod 104 and the central shaft of the upright post 101 is 60 degrees; the top of stand 101 and foundation 102 is connected jointly at upper portion bracing piece 105 both ends, wherein, upper portion bracing piece 105 is less than the size of lower part bracing piece 104, when upper portion bracing piece 105 and stand 101 part subside below the surface of water, its part is located near the surface of water, can adopt corrosion resistant material, improve the corrosion resistance of fan, in order to prolong the life of fan, simultaneously, make the fan foundation less near the surface of water, can reduce the platform to a certain extent and move by the degree of each under the effect of stormy waves, guarantee the operation effect of fan, improve the productivity.

The top and the bottom of foundation post 102, the bottom of stand 101 all belong to sealing state, and upper portion bracing piece 105, lower part bracing piece 104, side direction flotation pontoon 103 and foundation post 102, stand 101's junction adopts fixed connection simultaneously, ensures that the fan foundation when meetting complicated wave environment, does not have the inside that the sea water enters into the fan foundation structure to ensure the stability of fan foundation post 102.

The utility model discloses a design like this for fan foundation structure overall structure distributes around the center pin circumference array of stand 101 for overall structure is more regular, the atress is more steady even, the wholeness is strong, lies in below the surface of water when its operating condition, and fan foundation structure's water plane area is little, makes wave load greatly reduced, can reduce the fan and move by degree respectively under the wave action, promotes wind-powered electricity generation platform's whole rigidity and stability.

The top and the bottom of the base column 102 and the bottom of the upright column 101 are all in a sealing state, so that instability of the fan caused by internal water filling of a fan foundation structure can be prevented under the action of complex stormy waves; the fan foundation structure is wholly immersed below the water surface, and the transition section of the upper fan and the foundation structure can be made of corrosion-resistant materials so as to reduce corrosion of seawater and prevent performance from being reduced; in addition, the cavities in the floating body structure are communicated with each other, so that the height of the floating center of the fan foundation can be conveniently adjusted through ballast water.

In this embodiment, the specific implementation manner is as follows: as shown in fig. 1, preferably, the top of the pillar 101 is higher than the top of the base pillar 102, and the bottom of the pillar 101 is higher than the bottom of the base pillar 102. Thus, when the upper portion of each of the base posts 102 and the upper portion of the upright post 101 are connected by the upper support bar 105, each of the upper support bars 105 is inclined. When the lower part of each base column 102 is connected with the lower part of the upright 101 through the lower support rods 104, each lower support rod 104 is inclined.

Preferably, three upper support rods 105 are distributed around the circumferential array of the upright 101, three lower support rods 104 are distributed around the circumferential array of the upright 101, and the benefits of the circumferential array distribution of both the upper support rods 105 and the lower support rods 104 are: when the fan foundation structure is used, all positions are stressed in water identically, so that the stress uniformity and the stability are improved.

The lateral pontoons 103 are hollow barrels, the tops of two adjacent base columns 102 are connected through the lateral pontoons 103, the number of the lateral pontoons 103 can be three, six or nine, etc., the number of the lateral pontoons 103 is set according to three floating bodies, the number of the lateral pontoons 103 is an integer multiple of three, and the number of the lateral pontoons is three, six or nine, for example, the following three situations are taken:

1. when the number of the lateral pontoons 103 is three, two adjacent tops of the base columns 102 are connected by one lateral pontoon 103, the lateral pontoons 103 can be arranged at will, for example, in an inclined or horizontal manner, but the same arrangement mode of the three lateral pontoons 103 is ensured, so that the three lateral pontoons 103 are distributed around the circumferential array of the upright column 101 after being arranged, the stress of each part is uniform, and the stability is improved.

2. When the number of the lateral pontoons 103 is six, two adjacent top portions of the base columns 102 are connected by two lateral pontoons 103, and two lateral pontoons 103 between two adjacent base columns 102 are a group, each group of lateral pontoons 103 can be arranged at will, for example, obliquely, crosswise, parallel or horizontally, but three groups of lateral pontoons 103 are required to be ensured to be arranged in the same manner, so that the three groups of lateral pontoons 103 are distributed around the circumference array of the upright column 101 after being arranged, so that stress uniformity of each place is ensured, and stability is improved.

3. When the number of the lateral pontoons 103 is nine, the tops of two adjacent base columns 102 are connected by three lateral pontoons 103, and three lateral pontoons 103 between two adjacent base columns 102 are a group, each group of lateral pontoons 103 can be arranged at will, for example, obliquely, crosswise, parallel or horizontally, but three groups of lateral pontoons 103 are required to be ensured to be arranged in the same manner, so that the three groups of lateral pontoons 103 are distributed around the circumference array of the upright column 101 after being arranged, so that stress uniformity of each part is ensured, and stability is improved.

In summary, in this embodiment, as shown in fig. 1, the number of the lateral pontoons 103 is six, two adjacent top portions of the base columns 102 are all connected by the lateral pontoons 103, and two adjacent bottom portions of the base columns 102 are all connected by the lateral pontoons 103, and the upper lateral pontoons 103 and the lower lateral pontoons 103 are all horizontally arranged and parallel to each other.

In this embodiment, the inner cavity of the base column 102, the inner cavity of the lateral pontoon 103 located below, and the inner cavity of the lower support bar 104 are communicated with each other to form a sealed cavity, and ballast water is filled in the sealed cavity. The three-floating-body full-submersible type fan foundation structure is integrally positioned at a certain depth below the water surface in the working state, and the water plane area of the fan foundation structure is small, so that the wave load is greatly reduced; the ballast water is used for realizing the operation draft, the lateral pontoons 103 positioned below are completely filled with the ballast water, the distance from the pressure water head to the top of the ballast water of each base column 102 can be adjusted according to more detailed analysis, the inner cavities of the base columns 102, the lower lateral pontoons 103 and the lower supporting rods 104 are communicated with each other, the dynamic adjustment of the ballast water can be realized, and the balance of a fan foundation is facilitated.

In a specific example, the center of gravity of the offshore three-floating-body full-submersible foundation structure is-13.877 m, and the floating center is-14.541 m. The base column 102 has a diameter of 12m, the column 101 has a diameter of 6.5m, the lateral pontoon 103 and the lower support bar 104 have a diameter of 4m, and the upper support bar 105 has a diameter of 2m. The mass of the fan foundation structure is 2392.21t and the drainage is 9649.87t.

It should be noted that: the specific parameters of the offshore three-floating-body fully submerged foundation structure can be analyzed and adjusted in detail according to the conditions of different sea areas, and proper mooring system arrangement can be selected according to requirements, so that the specific size data in the example are not required to be limited.

In addition, considering that the fan foundation structure needs corrosion protection in seawater use, two situations need to be considered when the fan foundation structure is selected: (1) When the upright post 101 is completely submerged in water, common steel materials are adopted, and the upper fan and the fan foundation structure transition section can be made of corrosion-resistant materials. (2) When the upright post 101 and the upper support rod 105 are partially submerged in water, both are made of corrosion resistant materials. Meanwhile, a corrosion-resistant material is adopted for a structure near the water surface, the corrosion-resistant requirement of the wind turbine in the ocean complex environment is considered, and the wind resistance and the stability of the full-submerged wind power platform are further improved through the mooring system 106. It should be noted that the corrosion-resistant material may be selected from corrosion-resistant materials such as weather-resistant steel and fiber reinforced composite (FRP), and the selected corrosion-resistant materials are not limited to the two materials, and other applicable corrosion-resistant materials are also within the scope of the present application.

In this embodiment, as shown in fig. 3, the mooring system 106 includes a plurality of mooring lines 107, one end of each mooring line 107 is connected to the foundation column 102, and the other end is connected to an anchor pile on the sea floor, and the mooring system 106 further includes a ballast device 108, and each mooring line 107 is suspended with the ballast device 108. The ballast means 108 preferably use ballast blocks and the mooring lines 107 preferably use anchor chains in a number in the range of 3-9. The whole foundation structure (or wind power platform) is conveniently fixed under water through the mooring system 106, wind wave load is reduced, and the overall stability of the three-floating-body full-submersible foundation structure is improved.

The mooring system 106 is formed by arranging a group of cable guide holes 109 at the bottom of each foundation column 102, wherein the group of cable guide holes comprises at least one cable guide hole 109, preferably one to three cable guide holes 109, connecting one end of the anchor chain with the corresponding cable guide hole 109, fixing the other end of the anchor chain on the seabed, and arranging a ballast block with certain mass at the lower part of the anchor chain; preferably, the group of cable guiding holes comprises three cable guiding holes 109 and corresponds to nine anchor chains in total, and nine anchor chains are symmetrically arranged at the same time, as shown in fig. 4, three anchor chains are connected with the cable guiding holes 109 corresponding to the bottom of the base column 102, the included angle between any two adjacent anchor chains is 40 degrees, and restoring force is provided for the fan foundation structure from all directions, so that the stability of the fan is ensured.

The three-floating-body full-submerged foundation floating body structure is arranged in an equilateral triangle shape, has good stability, is simple in structural arrangement, and meanwhile, a plurality of anchor chains in the mooring system are arranged circumferentially around the upright post 101, so that the foundation has good vertical and horizontal rigidity, the connection strength of the mooring system and the foundation floating body structure is improved, and the overall stability of the three-floating-body full-submerged foundation is further improved.

In the working state, the three-floating-body full-submersible type fan foundation is integrally positioned at a certain depth below the water surface, and the area of the water plane of the fan foundation is small, so that the wave load is greatly reduced; the ballast water is used for realizing operation draft, the lower side pontoon 103 is fully filled with the ballast water, the distance from the pressure water head to the top of the ballast water of each base column 102 can be adjusted according to more detailed analysis, the base columns 102, the lower side pontoon 103 and the lower supporting rods 104 are communicated with each other, dynamic adjustment of the ballast water can be realized, and the balance of a fan foundation is facilitated.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An offshore three-floating-body full-submersible type fan foundation structure comprises a floating body structure and is characterized by comprising upright posts (101), three foundation posts (102), a plurality of lateral pontoons (103), a lower supporting rod (104) and an upper supporting rod (105);

the length directions of the base posts (102) and the upright posts (101) are consistent, the three base posts (102) are distributed in a circumferential array around the upright posts (101), and two adjacent base posts (102) are connected through the lateral floating pontoons (103);

the upper part of each base column (102) is connected with the upper part of the upright column (101) through the upper supporting rod (105), and the lower part of each base column (102) is connected with the lower part of the upright column (101) through the lower supporting rod (104).

2. The offshore three floating body full submersible wind turbine foundation structure according to claim 1, wherein in an operational state the top of the column (101) is higher than the top of the base column (102), and the bottom of the column (101) is higher than the bottom of the base column (102).

3. The offshore three floating body full submersible wind turbine foundation construction according to claim 2, wherein three of the upper support rods (105) are distributed around the circumferential array of columns (101) and three of the lower support rods (104) are distributed around the circumferential array of columns (101).

4. An offshore triple-floating body full submersible wind turbine foundation structure according to claim 3, wherein the number of the lateral floating bodies (103) is six, the tops of two adjacent base columns (102) are connected through the lateral floating bodies (103), the bottoms of two adjacent base columns (102) are connected through the lateral floating bodies (103), and the upper lateral floating bodies (103) and the lower lateral floating bodies (103) are parallel to each other and perpendicular to the base columns (102).

5. The offshore three floating body full submerged fan foundation structure of claim 4, characterized in that the base column (102), the lateral pontoon (103) and the lower supporting rod (104) are all hollow structures, and the inner cavity of the base column (102), the inner cavity of the lateral pontoon (103) positioned below and the inner cavity of the lower supporting rod (104) are mutually communicated to form a sealed cavity, and ballast water is filled in the sealed cavity.

6. The offshore three floating body full submersible wind turbine foundation structure of claim 1, wherein the bottom of each base column (102) is provided with a set of cable guide holes, each set of cable guide holes comprising at least one cable guide hole (109).

7. The offshore three buoy full submerged foundation construction according to any one of claims 1-6, further comprising a mooring system (106), the mooring system (106) comprising a plurality of mooring lines (107), one end of the mooring lines (107) being connected to the foundation column (102) and the other end being connected to an anchor pile at the sea floor.

8. The offshore three buoy full submerged foundation construction according to claim 7, characterized in that the mooring system (106) further comprises ballast means (108), each mooring line (107) having the ballast means (108) suspended thereon.

9. The offshore three buoy full submerged foundation construction of claim 8, characterized in that the mooring lines (107) are selected as anchor chains.

10. The offshore three floating body full submersible wind turbine foundation structure of claim 9, wherein the number of anchor chains ranges from 3-9.