Offshore wind power foundation and offshore wind power system

Abstract

The invention discloses an offshore wind power foundation and an offshore wind power system, and relates to the technical field of offshore wind power. The offshore wind power foundation comprises a fixed foundation, supporting piles, traction piles and traction cables, the fixed foundation comprises a bottom plate used for being buried in a seabed and a fixed plate at least partially used for being buried in the seabed, inserting grooves are formed in the fixed plate, and the supporting piles are inserted into the inserting grooves in a matched mode and matched with the bottom plate in a stopping mode; the ends, away from the fixed foundation, of the supporting piles are used for installing a wind turbine generator set, the multiple traction piles are arranged in the circumferential direction of the fixed foundation at intervals and used for being at least partially buried in a seabed, the traction cables correspond to the traction piles, and the two ends of each traction cable are connected with the corresponding traction pile and the corresponding supporting pile correspondingly. According to the offshore wind power foundation, the dependence on the pile foundation embedding depth can be reduced, the construction difficulty of the fixed foundation is reduced, the construction efficiency of the fixed foundation is improved, and the construction cost of the fixed foundation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and in particular to an offshore wind power foundation and an offshore wind power system. Background Art

[0002] Offshore wind power is an important renewable energy source, and my country is vigorously developing offshore wind power in coastal areas. Currently, the commonly used foundation types include single pile foundation, jacket foundation, barrel foundation and floating foundation. Among them, the single pile foundation has the advantages of simple structure, good construction and construction technology, short construction period, good economy, etc. After the wind turbine is built, it occupies a small sea area and has less impact on the marine environment. It is currently the most widely used wind turbine foundation type in offshore wind farms.

[0003] However, with the gradual development of offshore wind power, the development area is bound to move from the nearshore to the deep sea. The ocean depth continues to increase, and traditional fixed pile foundation wind turbines require longer and longer pile foundations. In deep water environments, due to higher requirements for construction equipment and technology, the process of deep piling becomes more complicated, which not only increases the difficulty of construction, but also significantly increases costs. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes an offshore wind power foundation, which can reduce the dependence on the buried depth of the pile foundation, reduce the construction difficulty of the fixed foundation, improve the construction efficiency of the fixed foundation, and reduce the construction cost of the fixed foundation.

[0006] An embodiment of the present invention further provides an offshore wind power system.

[0007] The offshore wind power foundation of the embodiment of the present invention includes:

[0008] A fixed foundation, the fixed foundation comprising a bottom plate and a fixed plate, the bottom plate being used to be buried in the seabed, at least a portion of the fixed plate being used to be buried in the seabed, and the fixed plate being provided with an insertion slot extending in a vertical direction;

[0009] A support pile, the support pile is plugged into the insertion slot and is matched with the bottom plate stopper, and the end of the support pile away from the fixed foundation is used for installing the wind turbine;

[0010] A traction pile and a traction rope, wherein a plurality of traction piles are arranged at intervals along the circumference of the fixed foundation, and the traction piles are used to be at least partially buried in the seabed, the traction rope is arranged corresponding to the traction piles, and the two ends of the traction rope are respectively connected to the traction piles and the support piles.

[0011] The offshore wind power foundation of the embodiment of the present invention can reduce the dependence on the buried depth of the pile foundation, reduce the construction difficulty of the fixed foundation, improve the construction efficiency of the fixed foundation, and reduce the construction cost of the fixed foundation.

[0012] In some embodiments, the insertion slot is a tapered slot, the cross-sectional diameter of the insertion slot decreases in a direction approaching the bottom plate, and the diameter of one end of the insertion slot close to the bottom plate is not less than the diameter of the support pile.

[0013] In some embodiments, a filling layer is included, a filling cavity is limited between the insertion groove and the side wall of the supporting pile, and the filling layer is arranged in the filling cavity to fill the filling cavity.

[0014] In some embodiments, the fixing plate includes a vertical section and a connecting section, the insertion slot coaxially passes through the vertical section and the connecting section, the connecting section is connected to the base plate and has a conical structure, and the outer cross-sectional diameter of the connecting section increases in a direction approaching the base plate.

[0015] In some embodiments, the outer diameter of one end of the connecting section connected to the vertical section is not less than the outer diameter of the vertical section, and the outer diameter of one end of the connecting section connected to the bottom plate is not greater than the diameter of the bottom plate.

[0016] In some embodiments, the outer diameter of the vertical section is not less than 1.5 times the diameter of the support pile, and the diameter of the bottom plate is not less than 3 times the diameter of the support pile.

[0017] In some embodiments, the vertical section, the connecting section and the base plate are integrally formed, and / or the minimum wall thickness of the vertical section is not less than one quarter of the diameter of the support pile, and the thickness of the base plate is not less than one fifth of the diameter of the support pile.

[0018] In some embodiments, the difference between the diameter of the end of the insertion slot away from the bottom plate and the diameter of a section of the insertion slot close to the bottom plate is no more than 100 mm, and the slot depth of the insertion slot is no less than 0.8 times of the supporting pile.

[0019] In some embodiments, the traction piles are suction cylinders, and at least three traction piles are provided and are evenly spaced around the fixed foundation.

[0020] The offshore wind power system of the embodiment of the present invention includes the offshore wind power foundation of any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of an offshore wind power foundation according to an embodiment of the present invention.

[0022] Figure 2It is a cross-sectional view of a fixed foundation in an offshore wind power foundation according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Fixed base 1; bottom plate 11; fixed plate 12; insertion slot 121; vertical section 122; connecting section 123;

[0025] Support pile 2;

[0026] Traction pile 3;

[0027] Towing rope 4;

[0028] Seabed 5. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figure 1 and Figure 2 As shown, the offshore wind power foundation of the embodiment of the present invention includes a fixed foundation 1, a supporting pile 2, a traction pile 3 and a traction rope 4. The fixed foundation 1 includes a bottom plate 11 and a fixed plate 12. The bottom plate 11 is used to be buried in the seabed 5, and at least a part of the fixed plate 12 is used to be buried in the seabed 5. The fixed plate 12 is provided with an insertion groove 121 extending in the vertical direction. The supporting pile 2 is plugged into the insertion groove 121 and is stopped by the bottom plate 11. The end of the supporting pile 2 away from the fixed foundation 1 is used to install a wind turbine. A plurality of traction piles 3 are arranged at intervals along the circumference of the fixed foundation 1, and the traction piles 3 are used to be at least partially buried in the seabed 5. The traction rope 4 is arranged corresponding to the traction pile 3, and the two ends of the traction rope 4 are respectively connected to the traction pile 3 and the supporting pile 2.

[0031] When installing the offshore wind power foundation of the embodiment of the present invention, first determine the buried positions of the fixed foundation 1 and the multiple traction piles 3 on the seabed 5, dig a foundation pit corresponding to the installation position of the fixed foundation 1, place the fixed foundation 1 horizontally in the foundation pit, and then backfill the foundation pit to fix the installation foundation, so as to ensure that the bottom plate 11 is buried in the seabed 5, and the fixed plate 12 is partially or completely buried in the seabed 5. When the fixed plate 12 is completely buried in the seabed 5, the top of the fixed plate 12 is flush with the surface of the seabed 5, and the support pile 2 is inserted and assembled in the insertion groove 121. The bottom of the support pile 2 is stopped by the bottom plate 11, and the support pile 2 is supported by the bottom plate 11 to ensure the stability of the support pile 2 after installation. At the same time, the traction pile 3 is buried on the surrounding side of the fixed foundation 1, and the traction cable 4 is connected between the traction pile 3 and the support pile 2, and the traction cable 4 is pre-tightened. The multiple traction cables 4 and the traction pile 3 traction and fix the support pile 2 to ensure the stability of the support pile 2 installed in the seawater.

[0032] The offshore wind power foundation of the embodiment of the present invention provides support for the supporting piles 2 by setting a fixed foundation 1, and increases the contact area with the seabed 5 through the fixed foundation 1, reduces the pressure on the contact surface with the seabed 5, improves the bearing capacity of the supporting piles 2, and thus reduces the length of the supporting piles 2 buried in the seabed 5. Compared with the traditional single pile foundation, it reduces the dependence on the buried depth of the pile foundation, reduces the pile driving depth, reduces the construction difficulty of the fixed foundation 1, and effectively reduces the construction cost caused by the pile foundation fixation, reduces the damage to the ocean, and at the same time, the support piles 2 are further fixed by the traction piles 3 and the traction ropes 4, so as to ensure the stability of the pile foundation after installation, improve the construction efficiency of the offshore wind power foundation, and reduce the construction cost of the offshore wind power foundation.

[0033] In some embodiments, Figure 1 and Figure 2 As shown, the insertion slot 121 is a tapered slot, and the cross-sectional diameter of the insertion slot 121 decreases in the direction approaching the base plate 11, and the diameter of the end of the insertion slot 121 close to the base plate 11 is not less than the diameter of the support pile 2. By setting the insertion slot 121 as a tapered slot, when installing the support pile 2, the diameter of the side of the insertion slot 121 away from the base plate 11 is larger than the diameter of the support pile 2, so as to facilitate initial plug-in. At the same time, the cross-sectional diameter of the insertion slot 121 gradually decreases in the direction approaching the base plate 11, so as to guide and constrain the installation of the support pile 2, so that the projection of the center of gravity of the support pile 2 on the fixed foundation 1 coincides with the center of gravity of the fixed foundation 1, thereby increasing the stability of the fixed foundation 1 and the support pile 2 after fixation, reducing the construction difficulty, and facilitating rapid construction.

[0034] In some embodiments, a filling layer is included, a filling cavity is limited between the insertion groove 121 and the side wall of the supporting pile 2, and the filling layer is arranged in the filling cavity to fill the filling cavity.

[0035] Specifically, after the support pile 2 is assembled in the insertion groove 121, since the insertion groove 121 is a conical groove, the gap between the insertion groove 121 and the side wall of the support pile 2 forms a filling cavity that can be filled with fillers. Concrete is filled into the filling cavity through underwater concrete grouting technology. After the concrete solidifies, a filling layer is formed in the filling cavity to ensure the firmness of the connection between the support pile 2 and the fixed foundation 1, thereby increasing the stability of the support pile 2 after being fixed in the seabed 5.

[0036] In some embodiments, Figure 1 and Figure 2As shown, the fixed plate 12 includes a vertical section 122 and a connecting section 123, and the insertion groove 121 coaxially penetrates the vertical section 122 and the connecting section 123. The connecting section 123 is connected to the base plate 11 and has a conical structure. The outer diameter of the cross section of the connecting section 123 increases in the direction approaching the base plate 11. By setting the fixed plate 12 as the vertical section 122 and the connecting section 123, the volume of the fixed plate 12 can be reduced while the cross-sectional area of ​​the base plate 11 remains unchanged, so as to reduce the material cost. At the same time, by setting the conical connecting section 123 and ensuring the connection strength and reliability between the vertical section 122 and the base plate 11, it is avoided that the vertical section 122 is broken relative to the base plate 11 due to the large force during use, thereby ensuring the overall structural strength of the fixed foundation 1.

[0037] In some embodiments, the outer diameter of one end where the connecting section 123 is connected to the vertical section 122 is not less than the outer diameter of the vertical section 122, and the outer diameter of one end where the connecting section 123 is connected to the base plate 11 is not greater than the diameter of the base plate 11. The outer dimensions of both ends of the connecting section 123 are restricted to ensure the connection strength between the vertical section 122 and the base plate 11, and to reduce the overall volume of the fixed foundation 1 to reduce engineering costs while meeting the requirements of the overall bearing capacity and stability of the fixed foundation 1.

[0038] Optionally, the outer diameter of one end where the connecting section 123 is connected to the vertical section 122 is equal to the outer diameter of the vertical section 122 , and the outer diameter of one end where the connecting section 123 is connected to the bottom plate 11 is equal to the diameter of the bottom plate 11 .

[0039] In some embodiments, the outer diameter of the vertical section 122 is not less than 1.5 times the diameter of the supporting pile 2, and the diameter of the bottom plate 11 is not less than 3 times the diameter of the supporting pile 2. The outer diameter of the vertical section 122 is limited to ensure the radial bearing capacity of the vertical section 122 in the insertion slot 121, and to ensure the fixing effect of the fixed foundation 1 on the supporting pile 2 after the supporting pile 2 is assembled. The diameter of the bottom plate 11 is limited to ensure the force-bearing area of ​​the bottom plate 11, so as to ensure the bearing capacity of the fixed foundation 1 and improve the stability of the supporting pile 2 after installation.

[0040] In some embodiments, the vertical section 122, the connecting section 123 and the bottom plate 11 are integrally formed. By integrally forming the vertical section 122, the connecting section 123 and the bottom plate 11, the overall strength of the fixed foundation 1 is improved, and the stability in the seabed 5 during use is ensured.

[0041] In some embodiments, the minimum wall thickness of the vertical section 122 is not less than one-fourth of the diameter of the supporting pile 2, and the thickness of the bottom plate 11 is not less than one-fifth of the diameter of the supporting pile 2. The wall thickness of the vertical section 122 and the thickness of the bottom plate 11 are controlled to ensure the minimum consumables required to fix the foundation 1 while ensuring the bearing capacity and overall structural strength, thereby facilitating the control of material costs.

[0042] Specifically, when the diameter of the support pile 2 is less than 500 mm, the minimum wall thickness of the vertical section 122 is not less than 150 mm and less than 200 mm, and the thickness of the bottom plate 11 is not less than 150 mm; when the diameter of the support pile 2 is not less than 500 mm and less than 800 mm, the minimum wall thickness of the vertical section 122 is not less than 200 mm, and the thickness of the bottom plate 11 is not less than 200 mm; when the diameter of the support pile 2 is not less than 800 mm and less than 1000 mm, the minimum wall thickness of the vertical section 122 is not less than 300 mm, and the thickness of the bottom plate 11 is not less than 200 mm; When the diameter of the supporting pile 2 is not less than 1000mm and less than 1500mm, the minimum wall thickness of the vertical section 122 is not less than 350mm, and the thickness of the bottom plate 11 is not less than 250mm; when the diameter of the supporting pile 2 is not less than 1500mm and less than 2000mm, the minimum wall thickness of the vertical section 122 is not less than 400mm, and the thickness of the bottom plate 11 is not less than 300mm; when the diameter of the supporting pile 2 is not less than 2000mm, the minimum wall thickness of the vertical section 122 is not less than one-fourth of the diameter of the supporting pile 2, and the thickness of the bottom plate 11 is not less than one-fifth of the diameter of the supporting pile 2.

[0043] In some embodiments, the difference between the diameter of the end of the insertion slot 121 away from the base plate 11 and the diameter of a section of the insertion slot 121 close to the base plate 11 is no more than 100 mm, and the difference in diameter between the two ends of the insertion slot 121 is limited to facilitate guiding and constraining the installation of the support pile 2 and ensure that the support pile 2 is fixed by the fixed foundation 1. The groove depth of the insertion slot 121 is no less than 0.8 times that of the support pile 2, and the groove depth of the insertion slot 121 is limited to ensure the fixing and connection effect of the fixed plate 12 on the support pile 2.

[0044] Specifically, the groove depth of the insertion groove 121 is determined according to the diameter of the supporting pile 2. When the diameter of the supporting pile 2 is less than 500mm, the groove depth of the insertion groove 121 can range from 1 times to 1.2 times the diameter of the supporting pile 2. When the diameter of the supporting pile 2 is not less than 500 and less than 800mm, the groove depth of the insertion groove 121 is equal to the diameter of the supporting pile 2. When the diameter of the supporting pile 2 is not less than 800 and not greater than 1000mm, the groove depth of the insertion groove 121 is equal to 0.9 times the diameter of the supporting pile 2, if the calculated value is less than 800mm and the value is 800mm, when the diameter of the supporting pile 2 is greater than 1000mm, the groove depth of the insertion groove 121 is equal to 0.8 times the diameter of the supporting pile 2, if the calculated value is less than 1000mm and the value is 1000mm.

[0045] Optionally, the difference between the diameter of the end of the insertion slot 121 away from the base plate 11 and the diameter of the support pile 2 is 150 mm, the difference between the diameter of a section of the insertion slot 121 close to the base plate 11 and the diameter of the support pile 2 is 100 mm, and the difference between the diameter of the end of the insertion slot 121 away from the base plate 11 and the diameter of a section of the insertion slot 121 close to the base plate 11 is 50 mm.

[0046] In some embodiments, the traction piles 3 are suction cylinders, and at least three traction piles 3 are provided and are evenly spaced around the fixed foundation 1. By providing the suction cylinders, the connection strength between the traction piles 3 and the seabed 5 is increased. By providing at least three traction piles 3, it is ensured that multiple traction cables 4 apply balanced traction force to the lateral support piles 2 around the fixed foundation 1, thereby preventing the support piles 2 from tilting during use.

[0047] An offshore wind power system according to an embodiment of the present invention is described below.

[0048] The offshore wind power system of the embodiment of the present invention includes the offshore wind power foundation of any one of the above embodiments.

[0049] The offshore wind power system of the embodiment of the present invention can reduce the dependence on the buried depth of the pile foundation, reduce the construction difficulty of the fixed foundation, improve the construction efficiency of the fixed foundation, and reduce the construction cost of the fixed foundation.

[0050] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An offshore wind power foundation, characterized in that: include: A fixed foundation, the fixed foundation comprising a bottom plate and a fixed plate, the bottom plate being used to be buried in the seabed, at least a portion of the fixed plate being used to be buried in the seabed, and the fixed plate being provided with an insertion slot extending in a vertical direction; A support pile, the support pile is plugged into the insertion slot and is matched with the bottom plate stopper, and the end of the support pile away from the fixed foundation is used for installing the wind turbine; A traction pile and a traction rope, wherein a plurality of traction piles are arranged at intervals along the circumference of the fixed foundation, and the traction piles are used to be at least partially buried in the seabed, the traction rope is arranged corresponding to the traction piles, and the two ends of the traction rope are respectively connected to the traction piles and the support piles.

2. The offshore wind power foundation according to claim 1, characterized in that: The insertion slot is a tapered slot, the cross-sectional diameter of the insertion slot decreases in a direction approaching the bottom plate, and the diameter of one end of the insertion slot close to the bottom plate is not less than the diameter of the support pile.

3. The offshore wind power foundation according to claim 2, characterized in that: A filling layer is included, a filling cavity is limited between the insertion groove and the side wall of the support pile, and the filling layer is arranged in the filling cavity to fill the filling cavity.

4. The offshore wind power foundation according to claim 2, characterized in that: The fixing plate includes a vertical section and a connecting section, the insertion slot coaxially passes through the vertical section and the connecting section, the connecting section is connected to the bottom plate and has a conical structure, and the outer diameter of the cross section of the connecting section increases in a direction approaching the bottom plate.

5. The offshore wind power foundation according to claim 4, characterized in that: The outer diameter of one end of the connecting section connected to the vertical section is not less than the outer diameter of the vertical section, and the outer diameter of one end of the connecting section connected to the bottom plate is not greater than the diameter of the bottom plate.

6. The offshore wind power foundation according to claim 5, characterized in that: The outer diameter of the vertical section is not less than 1.5 times the diameter of the supporting pile, and the diameter of the bottom plate is not less than 3 times the diameter of the supporting pile.

7. The offshore wind power foundation according to claim 4, characterized in that: The vertical section, the connecting section and the bottom plate are integrally formed, and / or the minimum wall thickness of the vertical section is not less than one quarter of the diameter of the supporting pile, and the thickness of the bottom plate is not less than one fifth of the diameter of the supporting pile.

8. The offshore wind power foundation according to claim 2, characterized in that: The difference between the diameter of the end of the insertion slot away from the bottom plate and the diameter of a section of the insertion slot close to the bottom plate is not greater than 100 mm, and the slot depth of the insertion slot is not less than 0.8 times of the supporting pile.

9. The offshore wind power foundation according to claim 1, characterized in that: The traction piles are suction cylinders, and at least three traction piles are provided and are arranged at equal intervals in the circumferential direction of the fixed foundation.

10. An offshore wind power system, characterized in that: An offshore wind power foundation comprising any one of claims 1-9.

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