阅读说明：本技术 海上风电复合基础 (Offshore wind power composite foundation ) 是由 马文冠 郭小江 刘鑫 邱旭 傅望安 段周朝 夏春辉 梁弘轩 于 2021-09-16 设计创作，主要内容包括：本发明提出了一种海上风电复合基础,包括主桩基础、增强基础和副桩基础。主桩基础用于承载风机,主桩基础的一部分埋入海床中,增强基础与主桩基础的外壁面相连,增强基础的底面与海床面相抵,增强基础上设有开孔。副桩基础的一部分配合在开孔中,另一部分埋入海床中。增强基础避免主桩基础倾斜、倾覆,还具有一定防冲刷的作用。副桩基础能够与海床和增强基础中的每一者相互作用,进一步提高海上风电复合基础的抗倾承载能力。(The invention provides an offshore wind power composite foundation which comprises a main pile foundation, a reinforced foundation and an auxiliary pile foundation. The main pile foundation is used for bearing a fan, a part of the main pile foundation is embedded into a seabed, the reinforced foundation is connected with the outer wall surface of the main pile foundation, the bottom surface of the reinforced foundation is abutted against the surface of the seabed, and the reinforced foundation is provided with an opening. One part of the auxiliary pile foundation is fitted in the opening hole, and the other part is buried in the seabed. The reinforced foundation avoids the inclination and the overturn of the main pile foundation and also has a certain anti-scouring function. The secondary pile foundation is capable of interacting with each of the seabed and the reinforced foundation to further improve the anti-tilt bearing capacity of the offshore wind power composite foundation.)

1. An offshore wind power composite foundation, comprising:

a king pile foundation for carrying a wind turbine, a portion of the king pile foundation being buried in a seabed, the seabed having a seabed surface;

the reinforced foundation is connected with the outer wall surface of the main pile foundation, the bottom surface of the reinforced foundation is abutted against the surface of the sea bed, and the reinforced foundation is provided with an opening;

and a sub-pile foundation, one part of which is fitted in the open hole and the other part of which is buried in the seabed.

2. An offshore wind power composite foundation according to claim 1, wherein said reinforced foundation is a reinforced slab extending along said sea bed surface.

3. An offshore wind power composite foundation according to claim 1 or 2, characterized in that the area of the bottom surface of the reinforcement foundation is equal to or larger than 10 times the cross-sectional area of the main pile foundation.

4. The offshore wind power composite foundation of claim 1, wherein the reinforcement foundation nests the king pile foundation.

5. The offshore wind power composite foundation of claim 1, 2 or 4, wherein the secondary pile foundation comprises a plurality of secondary pile foundations arranged at intervals along the circumference of the main pile foundation.

6. The offshore wind power composite foundation of claim 5, wherein the central axis of the secondary pile foundation and the central axis of the main pile foundation are parallel to each other.

7. The offshore wind power composite foundation of claim 6, wherein the diameter of the primary pile foundation is D, and the distance between the central axis of the secondary pile foundation and the central axis of the primary pile foundation is D-1.5D.

8. The offshore wind power composite foundation of claim 1, wherein the sub-pile foundation is connected to the reinforcement foundation.

9. The offshore wind power composite foundation of claim 1, wherein the ratio of the diameter of the primary pile foundation to the diameter of the secondary pile foundation is 3-5.

10. The offshore wind power composite foundation of claim 2, wherein the opening is a through hole penetrating through the reinforcing plate in a thickness direction, and the sub-pile foundation includes a first portion located above the reinforcing plate, a second portion fitted in the through hole, and a third portion buried in a seabed through the through hole.

Technical Field

The application relates to the technical field of offshore wind power, in particular to an offshore wind power composite foundation.

Background

Wind energy is increasingly regarded by human beings as a clean and harmless renewable energy source. Compared with land wind energy, offshore wind energy resources not only have higher wind speed, but also are far away from a coastline, are not influenced by a noise limit value, and allow the unit to be manufactured in a larger scale.

The offshore wind power foundation is the key point for supporting the whole offshore wind power machine, the cost accounts for 20-25% of the investment of the whole offshore wind power, the offshore wind power foundation generally requires the service life of more than 20 years, and most accidents of the offshore wind power generator are caused by unstable pile foundations. As a main load foundation of an offshore wind turbine, a pile foundation is easy to incline or even topple under the action of wind power and tide. In addition, due to the action of waves and tide, silt around the offshore wind power pile foundation can be flushed and form a flushing pit, the flushing pit can affect the stability of the pile foundation, and collapse of an offshore wind power unit can be caused in severe cases.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides an offshore wind power composite foundation with strong bearing capacity and strong anti-inclination capacity.

The offshore wind power composite foundation comprises a main pile foundation, wherein the main pile foundation is used for bearing a fan, one part of the main pile foundation is buried in a seabed, and the seabed is provided with a seabed surface; the reinforced foundation is connected with the outer wall surface of the main pile foundation, the bottom surface of the reinforced foundation is abutted against the surface of the sea bed, and the reinforced foundation is provided with an opening; and a sub-pile foundation, one part of which is fitted in the open hole and the other part of which is buried in the seabed.

The offshore wind power composite foundation provided by the embodiment of the invention comprises a main pile foundation, a reinforced foundation and an auxiliary pile foundation. The arrangement of the reinforced foundation has the function of avoiding the inclination and the overturning of the main pile foundation. The auxiliary pile foundation is used for further improving the anti-inclination bearing capacity of the offshore wind power composite foundation. Therefore, the offshore wind power composite foundation provided by the embodiment of the invention has the advantages of strong bearing capacity and strong anti-inclination capacity.

In addition, the bottom surface of the reinforced foundation covers a part of the sea bed surface near the main pile foundation, and a certain anti-scouring effect can be achieved, so that the offshore wind power composite foundation provided by the embodiment of the invention also has anti-scouring performance.

In addition, the offshore wind power composite foundation provided by the invention also has the following additional technical characteristics:

in some embodiments, the reinforcing base is a reinforcing plate extending along the deck of the ocean floor.

In some embodiments, the area of the bottom surface of the reinforced foundation is equal to or greater than 10 times the cross-sectional area of the king pile foundation.

In some embodiments, the reinforcing foundation is nested within the pile foundation.

In some embodiments, the secondary pile foundation includes a plurality of the secondary pile foundations arranged at intervals along the circumference of the main pile foundation.

In some embodiments, the central axis of the secondary pile foundation and the central axis of the primary pile foundation are parallel to each other.

In some embodiments, the diameter of the primary pile foundation is D, and the distance between the central axis of the secondary pile foundation and the central axis of the primary pile foundation is D-1.5D.

In some embodiments, the secondary pile foundation is connected to the reinforcement foundation.

In some embodiments, the ratio of the diameter of the primary pile foundation to the diameter of the secondary pile foundation is 3-5.

In some embodiments, the open hole is a through hole penetrating the reinforcing plate in a thickness direction, the sub-pile foundation includes a first portion located above the reinforcing plate, a second portion fitted in the through hole, and a third portion buried in a seabed through the through hole.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of an offshore wind power composite foundation according to an embodiment of the invention.

FIG. 2 is a top view of an offshore wind power composite foundation according to an embodiment of the invention.

Reference numerals:

the main pile foundation 10, the reinforced foundation 20, the through hole 21, the auxiliary pile foundation 30, the first part 31 and the third part 32

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

An offshore wind power composite foundation of an embodiment of the invention is described below with reference to fig. 1 and 2. As shown in fig. 1, the offshore wind power composite foundation includes a main pile foundation 10, a reinforcement foundation 20, and a subsidiary pile foundation 30.

The main pile foundation 10 is used to carry the wind turbine above, and serves as the primary load-bearing foundation for the superstructure of the offshore wind power plant. A part of the main pile foundation 10 is buried downward into the sea bed having a sea bed surface, i.e., a part of the main pile foundation 10 is located below the sea bed surface and the other part is located above the sea bed surface.

The reinforced foundation 20 is connected to the outer wall surface of the main pile foundation 10, and the bottom surface of the reinforced foundation 20 abuts against the surface of the sea bed. Because the bottom surface of the reinforced foundation 20 has a certain area and abuts against the surface of the sea bed, the reinforced foundation 20 can provide a supporting force for the main pile foundation 10, and the bearing capacity of the main pile foundation 10 is enhanced. In addition, since the bottom surface of the reinforced foundation 20 covers a part of the sea bed surface located near the main pile foundation 10, a certain anti-scouring function can be achieved. The arrangement of the reinforced foundation 20 has the function of preventing the main pile foundation 10 from inclining and overturning, and ensures that the main pile foundation 10 has sufficient bearing capacity, anti-inclining capacity and anti-scouring capacity during service.

In addition, the reinforcing base 20 is provided with an opening 21, and a part of the sub-pile base 30 is fitted in the opening 21 and another part is buried in the seabed. It can be understood that, since the reinforcing base 20 is located above the surface of the sea bed, the portion of the sub pile base 30 fitted in the opening hole 21 is located at the portion of the sub pile base 30 buried in the sea bed. It should be noted that the opening 21 may be a through hole or a blind hole. The auxiliary pile foundation 30 is used for further improving the anti-tilting bearing capacity of the offshore wind power composite foundation.

It should be noted that, the wind turbine of the offshore wind power foundation is installed on the main pile foundation 10 to bear wind force, and the wind turbine transmits the force to the main pile foundation 10. The portion of the main pile foundation 10 between the sea level and the surface of the sea bed is subjected to tidal currents. The overturning force of the offshore wind power composite foundation mainly comes from the two situations. When the offshore wind power composite foundation is subjected to overturning force, one part of the auxiliary pile foundation 30 matched in the open hole 21 interacts with the reinforced foundation 20, and the part of the auxiliary pile foundation 30 embedded in the seabed interacts with the seabed, so that the main pile foundation 10 is prevented from inclining and overturning, and the offshore wind power composite foundation has excellent anti-overturning bearing capacity.

The offshore wind power composite foundation provided by the embodiment of the invention comprises a main pile foundation, a reinforced foundation and an auxiliary pile foundation. The arrangement of the reinforced foundation has the function of avoiding the inclination and the overturning of the main pile foundation. The auxiliary pile foundation is used for further improving the anti-inclination bearing capacity of the offshore wind power composite foundation. Therefore, the offshore wind power composite foundation provided by the embodiment of the invention has the advantages of strong bearing capacity and strong anti-inclination capacity.

In addition, because the bottom surface of the reinforced foundation 20 covers a part of the sea bed surface near the main pile foundation 10, a certain anti-scouring effect can be achieved, and therefore the offshore wind power composite foundation provided by the embodiment of the invention also has anti-scouring performance.

One embodiment provided by the present invention is described below with reference to fig. 1.

As shown in fig. 1, the reinforcement base 20 is a reinforcement plate extending along the surface of the sea bed, i.e. the plane of the reinforcement plate is parallel to the surface of the sea bed. The bottom surface of the reinforced foundation 20 is the surface of the reinforced plate facing the seabed, and the bottom surface of the reinforced foundation 20 is abutted against the seabed surface.

In this embodiment, the reinforcing base 20 is provided around the pile base 10. Specifically, a through hole is opened at the middle of the reinforcing base 20, and the main pile base 10 passes through the through hole. Optionally, a reinforcing foundation 20 is welded to the pile foundation 10.

Alternatively, the area of the bottom face of the reinforcing base 20 is equal to or greater than 10 times the cross-sectional area of the main pile base 10. Further optionally, the area of the bottom face of the reinforcing base 20 is equal to or greater than 12 times the cross-sectional area of the main pile base 10. So set up and to make compound basis of offshore wind power have excellent scour protection ability and anti-inclination ability. It should be noted that the cross-sectional area of the main pile foundation 10 refers to the area of a figure surrounded by the outer peripheral outline of the cross-section of the main pile foundation 10, for example, in the present embodiment, the main pile foundation 10 is a hollow cylindrical structure, the outer radius is R, and the cross-sectional area is equal to pi R²。

In other embodiments, the reinforced foundation 20 may have other structures, and the reinforced foundation 20 has a certain bottom area, and the bottom surface of the reinforced foundation can abut against the surface of the sea bed, which all belong to the protection scope of the present application, and are not described herein again. The embodiment adopts the plate structure as the reinforced foundation 20, and has the advantages of less material and low cost.

Also, in other embodiments, the reinforced foundation 20 may not be provided with the main pile foundation 10, for example, the reinforced foundation 20 includes a plurality of reinforcing plates, each of which extends outward from the outer wall surface of the main pile foundation 10 along the sea bed surface, and the plurality of reinforcing plates are radially disposed around the main pile foundation 10, so that the reinforcing and anti-tilt effects can be achieved.

Further, in this embodiment, the reinforcing plate has a square structure, and in other embodiments, the reinforcing plate may also have other structures such as a rectangle, a circle, and an ellipse, which are not described herein.

In some embodiments, the secondary pile foundation 30 may include a plurality, and a plurality of secondary pile foundations 30 are provided at intervals along the circumference of the primary pile foundation 10. The arrangement of the plurality of auxiliary pile foundations 30 around the main pile foundation 10 enables the offshore wind power composite foundation to better withstand forces from various directions, such as tidal currents or wind forces transferred downward from a wind turbine. The offshore wind power composite foundation comprising the plurality of auxiliary pile foundations 30 has stronger anti-tilting bearing capacity.

In the present embodiment, as shown in fig. 1, the number of the sub pile foundations 30 is 4, and 4 sub pile foundations 30 are arranged around the main pile foundation 10 at equal intervals.

Further, the central axis of the sub pile foundation 30 and the central axis of the main pile foundation 10 are parallel to each other. In this embodiment, the central axis of the auxiliary pile foundation 30 and the central axis of the main pile foundation 10 both extend in the vertical direction, so that the structure of the offshore wind power composite foundation is more reasonable.

Alternatively, the diameter (outer diameter) of the main pile foundation 10 is D, and the distance between the central axis of the sub pile foundation 30 and the central axis of the main pile foundation 10 is D-1.5D.

As shown in fig. 1, in the present embodiment, the opening on the reinforcing base 20 is a through hole 21, and the through hole 21 penetrates through the reinforcing base 20 in the thickness direction of the reinforcing base 20. The sub pile foundation 30 includes a first portion 31, a second portion, and a third portion 32. The first portion 31, the second portion and the third portion 32 are sequentially connected in the length direction of the sub-pile foundation 30, the first portion 31 is located above the reinforcing foundation 20, the second portion is fitted in the through hole, and the third portion 32 is buried in the seabed through the through hole 21. The structure of the offshore wind power composite foundation can be further reasonable by the arrangement, and the structural stability and the structural reliability of the offshore wind power composite foundation are improved.

Optionally, the length of the secondary pile foundation 30 is 1/3-1/2 of the length of the primary pile foundation 10.

Optionally, the length of the first portion 31 is 1/3-1/2 of the length of the secondary pile foundation 30.

Optionally, the length of the third portion 32 is 1/2-2/3 of the length of the secondary pile foundation 30.

In order to further improve the stability of the offshore wind power composite foundation, the auxiliary pile foundation 30 is connected with the reinforcement foundation 20. Optionally, the sub pile foundation 30 is welded to the reinforcing foundation 20.

It should be noted that, since the secondary pile foundation 30 does not need to bear a large structure such as a fan, the diameter of the secondary pile foundation 30 may be generally smaller than the diameter of the primary pile foundation 10. Moreover, the arrangement of the reinforced foundation 20 and the auxiliary pile foundation 30 greatly improves the bearing capacity and the anti-tilting capacity of the offshore wind power composite foundation, the diameter and the length of the main pile foundation 10 are reduced, the bearing capacity of the offshore wind power composite foundation is not affected, materials are saved, and the construction difficulty and the construction cost are reduced.

Optionally, the ratio of the diameter of the main pile foundation 10 to the diameter of the subsidiary pile foundation 30 is 3 to 5.

Optionally, the diameter of the primary pile foundation 10 is 5m-8 m.

Optionally, the diameter of the auxiliary pile foundation 30 is 1m-3 m.

In summary, according to the offshore wind power composite foundation provided by the embodiment of the invention, the reinforced foundation connected with the main pile foundation is arranged, so that the inclination and the overturn of the main pile foundation are avoided, and a certain anti-scouring effect is achieved. One part of the auxiliary pile foundation is buried in the seabed, and the other part of the auxiliary pile foundation is matched in the opening of the reinforced foundation and can interact with each of the seabed and the reinforced foundation, so that the anti-inclination bearing capacity of the offshore wind power composite foundation is further improved. The offshore wind power composite foundation provided by the embodiment of the invention has the advantages of strong bearing capacity, good erosion resistance and strong anti-inclination capacity.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.