Offshore wind power foundation scour protection sleeve structure
By designing a combined structure of reverse arc section and soil-entry section sleeve, combined with limiting blocks and biological barriers, the problem of soil loss caused by ocean currents, waves and tides in offshore wind power foundation piles was solved, thereby improving the stability and adaptability of the piles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RESOURCES NEW ENERGY INVESTMENT CO LTD FUJIAN BRANCH
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-07
AI Technical Summary
Offshore wind turbine foundation piles are affected by ocean currents, waves, and tides, and the soil around the piles is prone to erosion, forming scour pits that threaten the stability of the pile foundation. Traditional riprap protection and concrete retaining walls have poor adaptability.
Design a scour protection sleeve structure for offshore wind power foundations, including a reverse arc sleeve and a soil penetration sleeve. The combination of the reverse arc sleeve and the soil penetration sleeve, by changing the direction of water flow and penetrating deep into the soil layer, combined with limiting blocks, positioning rods and biological barriers, enhances stability and adaptability.
It effectively reduces soil erosion around the piles, enhances the stability of offshore wind power foundation piles, adapts to complex soil conditions, prevents sleeve displacement and corrosion, and forms a stable silt cover layer.
Smart Images
Figure CN224468446U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of power construction technology, and in particular relates to an anti-scouring sleeve structure for offshore wind power foundations. Background Technology
[0002] Against the backdrop of global energy transition, offshore wind power has developed rapidly due to its advantages such as abundant wind energy resources and minimal land occupation.
[0003] However, the current offshore wind power foundation piles are affected by ocean currents, waves and tides, and the soil around the piles is prone to erosion, forming scour pits that threaten the stability of the pile foundation. Although traditional riprap protection and concrete retaining walls can block water, they have poor adaptability. The former is easily washed away by ocean currents, and the latter has poor coordination with soil deformation. Moreover, both are difficult to adapt to complex soil conditions. Utility Model Content
[0004] This utility model aims to provide an anti-scouring sleeve structure for offshore wind power foundations, which solves the problem of soil loss around the piles caused by ocean currents, waves and tides.
[0005] This utility model is implemented as follows: an anti-scour sleeve structure for offshore wind power foundations includes: an anti-scour sleeve body, which is sleeved around the offshore wind power foundation pile; wherein, the anti-scour sleeve body is divided into a continuously connected reverse arc section sleeve and a soil-entry section sleeve; the upper edge tangent of the reverse arc section sleeve is parallel to the axial direction of the offshore wind power foundation pile.
[0006] Preferably, a limiting block is fixedly installed on the sleeve of the soil entry section. Each limiting block has an insertion hole, and a positioning rod for positioning is installed in the insertion hole. The bottom end of the positioning rod is a pointed cone shape for breaking through the soil.
[0007] Preferably, the sleeve for inserting into the soil is vertically inserted below the soil layer; the lower middle part of the anti-erosion sleeve body is provided with regularly distributed circular holes.
[0008] Preferably, the outer wall and inner wall of the anti-erosion sleeve body are respectively coated with a rough coating and an epoxy resin anti-corrosion layer.
[0009] Preferably, the top of the anti-scour sleeve body is provided with a through hole, which is adapted to the offshore wind power foundation pile.
[0010] Preferably, the positioning rod is provided with a spiral protruding rib, which is adapted to the spiral groove opened on the inner wall of the insertion hole.
[0011] Preferably, the angle between the lower edge tangent of the reverse arc sleeve and the axial direction of the soil-entry sleeve is 120°, the inner diameter of the upper edge of the reverse arc sleeve is 10mm larger than the outer diameter of the offshore wind power foundation pile being protected, and the diameter of the lower edge is equal to the diameter of the soil-entry sleeve.
[0012] Preferably, the height of the sleeve in the soil section is 2m, the diameter of the circular pore is 1 / 5 to 1 / 5 of the sleeve diameter, and the pore is evenly distributed along the circumference of the sleeve.
[0013] Compared with related technologies, the scour protection sleeve structure for offshore wind power foundations provided by this utility model has the following advantages:
[0014] Excellent protection is achieved through the unique structural design and functional configuration of the anti-scour sleeve body. The combination of the reverse arc sleeve and the soil-penetrating sleeve effectively guides water flow and reduces soil erosion around the pile. Attached Figure Description
[0015] Figure 1 A front sectional view of an anti-scouring sleeve structure for offshore wind power foundations provided by this utility model;
[0016] Figure 2 This is a three-dimensional structural diagram of the anti-erosion sleeve body in this utility model;
[0017] Figure 3 This is a partial cross-sectional view of the main body of the anti-erosion sleeve in this utility model;
[0018] Figure 4 for Figure 1 The diagram shows an enlarged view of part A.
[0019] Reference numerals in the attached drawings: 1. Anti-erosion sleeve body; 2. Reverse arc sleeve; 3. Soil-entry sleeve; 4. Offshore wind power foundation pile; 5. Circular hole; 6. Limiting block; 7. Insertion hole; 8. Positioning rod. Detailed Implementation
[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0021] This utility model embodiment provides an anti-scouring sleeve structure for offshore wind power foundations, such as... Figure 1-4As shown, the scour protection sleeve structure for offshore wind power foundations includes: a scour protection sleeve body 1, which is sleeved around the offshore wind power foundation pile 4; wherein, the scour protection sleeve body 1 is divided into a continuously connected reverse arc section sleeve 2 and a soil-entry section sleeve 3; the upper edge tangent of the reverse arc section sleeve 2 is parallel to the axial direction of the offshore wind power foundation pile 4.
[0022] In this embodiment, the anti-scour sleeve body 1 is fitted around the offshore wind power foundation pile 4, and it is composed of a continuously connected reverse arc section sleeve 2 and a soil-inserting section sleeve 3. During installation, it is ensured that the upper edge tangent of the reverse arc section sleeve 2 is parallel to the axial direction of the offshore wind power foundation pile 4, and the soil-inserting section sleeve 3 is buried in the soil layer around the pile, thereby completing the installation of the anti-scour sleeve body 1;
[0023] Under the influence of ocean currents, waves, and tides, the anti-scouring sleeve body 1, composed of the reverse arc sleeve 2 and the embedded sleeve 3, plays its role. The reverse arc sleeve 2 changes the direction of water flow, reducing the direct impact on the soil around the pile; the embedded sleeve 3 penetrates deep into the soil layer, stabilizing the entire sleeve. Together, they guide the water flow path, reduce the degree of erosion of the soil around the pile, and effectively alleviate soil loss.
[0024] Compared to traditional methods such as riprap protection and concrete retaining walls, the main structure 1 of this scour protection sleeve has a more rational design. The sleeve 3, which is embedded deep into the soil, avoids the problem of being easily eroded by ocean currents, as is the case with riprap protection. The continuous structure of the sleeve 2 and the sleeve 3, which is in the reverse arc section, can better adapt to soil deformation, solve the drawback of poor coordination between concrete retaining walls and soil deformation, enhance the adaptability to complex soil conditions, and ensure the stability of the offshore wind power foundation piles 4.
[0025] In a further preferred embodiment of this utility model, a limiting block 6 is fixedly installed on the sleeve 3 of the soil entry section. Each limiting block 6 has an insertion hole 7. A positioning rod 8 for positioning is provided in the insertion hole 7. The bottom end of the positioning rod 8 is a pointed cone shape for breaking through the soil.
[0026] In this embodiment, when installing the anti-scour sleeve body 1, the soil-insertion sleeve 3 is first fitted around the offshore wind power foundation pile 4 and initially positioned, with the limiting block 6 already fixedly installed on the soil-insertion sleeve 3. Subsequently, the positioning rod 8 is inserted into the insertion hole 7 of the limiting block 6 with its tip facing down. Utilizing the conical structure at the bottom of the positioning rod 8, it is inserted into the seabed soil layer, achieving precise positioning of the soil-insertion sleeve 3 through the positioning rod 8, thereby completing the installation of the anti-scour sleeve body 1.
[0027] Under the long-term action of ocean currents, waves and tides, the positioning rod 8 penetrates deep into the soil layer with its pointed conical bottom end, providing stable support for the sleeve 3 in the soil section and preventing the sleeve from shifting; the combination of the limiting block 6 and the insertion hole 7 ensures that the positioning rod 8 is fixed in position, and the two work together to maintain the stable state of the sleeve 3 in the soil section, so that the reverse arc sleeve 2 and the sleeve 3 in the soil section can continuously and effectively guide the water flow path and reduce the erosion of the soil around the pile.
[0028] In a further preferred embodiment of this utility model, the soil insertion sleeve 3 is vertically inserted below the soil layer; the lower middle part of the anti-erosion sleeve body 1 is provided with regularly distributed circular holes 5.
[0029] In this embodiment, under the influence of ocean currents, waves, and tides, the embedded section sleeve 3 penetrates vertically into the soil layer, providing stable support for the anti-scour sleeve body 1. The circular pores 5 in the lower part of the anti-scour sleeve body 1 allow water to flow slowly, reducing the local water flow velocity near the pores and promoting the deposition of sediment carried in the water within the pores and around the sleeve, gradually forming a stable sediment cover layer on the inner side of the sleeve, which, together with the embedded section sleeve 3, resists the scour of the soil around the pile by the water flow.
[0030] In a further preferred embodiment of the present invention, the outer wall and inner wall of the anti-erosion sleeve body 1 are respectively coated with a rough coating and an epoxy resin anti-corrosion layer.
[0031] In this embodiment, in a complex marine environment, the rough coating on the outer wall of the anti-scour sleeve body 1 attracts marine organisms such as shellfish and algae to attach and grow. As these organisms multiply, a natural biological barrier is gradually formed. This biological barrier effectively reduces the impact of water flow on the outer wall of the sleeve, lowers the water flow velocity, and stabilizes the seabed. Simultaneously, the epoxy resin anti-corrosion layer on the inner wall isolates seawater from direct contact with the sleeve body. With its excellent corrosion resistance, it resists seawater erosion, preventing damage to the sleeve body due to seawater corrosion and ensuring the integrity and stability of the sleeve structure.
[0032] In a further preferred embodiment of the present invention, the top of the anti-erosion sleeve body 1 is provided with a through hole, which is adapted to the offshore wind power foundation pile 4.
[0033] In this embodiment, when installing the anti-scour sleeve body 1, the through hole at the top of the sleeve is aligned with the offshore wind power foundation pile 4, so that the pile passes through the through hole. Then, the anti-scour sleeve body 1 is fitted onto the outside of the pile, and the sleeve 3 in the soil section is vertically inserted into the seabed. Through the matching relationship between the through hole and the pile, the positioning and installation of the anti-scour sleeve body 1 is completed quickly and accurately, ensuring its stable position.
[0034] In a further preferred embodiment of the present invention, the positioning rod 8 is provided with a spiral protruding rib, which is adapted to the spiral groove opened on the inner wall of the insertion hole 7.
[0035] In this embodiment, the positioning rod 8 with spiral protruding ridges is aligned with the insertion hole 7 and inserted by rotating it along the spiral groove direction, so that the spiral protruding ridges tightly engage with the spiral groove on the inner wall of the insertion hole 7 until the pointed cone-shaped part of the bottom of the positioning rod 8 penetrates deep into the seabed soil layer, completing the positioning and fixing of the soil-inserting section sleeve 3. Under the action of external forces such as ocean currents, waves, and tides, the spiral engagement structure between the positioning rod 8 and the insertion hole 7 plays its role. The spiral protruding ridges and the spiral groove interlock to form a mechanical locking effect, effectively resisting the pulling and shaking of external forces in the horizontal and vertical directions. Even when encountering strong water flow impact, the positioning rod 8 is not easy to loosen or come out, continuously providing stable support for the soil-inserting section sleeve 3, keeping it in the predetermined position, and working together with other structures of the anti-erosion sleeve body to resist seabed erosion.
[0036] In a further preferred embodiment of this utility model, the angle between the lower edge tangent of the reverse arc sleeve 2 and the axial direction of the soil-entry sleeve 3 is 120°, the inner diameter of the upper edge of the reverse arc sleeve 2 is 10mm larger than the outer diameter of the offshore wind power foundation pile 4 it protects, and the diameter of the lower edge is equal to the diameter of the soil-entry sleeve 3.
[0037] In this embodiment, under the impact of ocean currents, waves, and tides, the special structures of the reverse-arc sleeve 2 and the embedded sleeve 3 work synergistically. The upper edge of the reverse-arc sleeve 2 encloses the pile, and its unique 120° angle design changes the direction of water flow, guiding the water flow around the pile and reducing the formation of eddies around the pile; the embedded sleeve 3 extends deep into the seabed, providing stable support for the entire sleeve. The structure of the reverse-arc sleeve 2 and the embedded sleeve 3 having the same diameter ensures a smooth water flow transition, reduces the scouring force of the water flow on the soil around the pile, and effectively protects the pile foundation.
[0038] In a further preferred embodiment of this utility model, the height of the soil-entry section sleeve 3 is 2m, the diameter of the circular orifice 5 is 1 / 5 of the sleeve diameter, and the orifice is evenly distributed along the circumference of the sleeve.
[0039] In this embodiment, under the continuous action of ocean currents, waves, and tides, the embedded section sleeve 3 is firmly rooted in the seabed at a depth of 2m, providing support for the scour-resistant sleeve body 1. The evenly distributed circular pores 5 in the lower part of the sleeve allow some water to flow slowly through. As the water flows through the pores, the flow velocity decreases, reducing the direct impact on the soil around the pile. Simultaneously, the sediment carried by the water, due to the reduced flow velocity, deposits within the pores and around the sleeve, gradually forming a stable sediment cover layer over time, further enhancing the scour resistance of the soil surrounding the pile foundation.
[0040] In summary, compared with related technologies, the unique structural design and functional configuration of the anti-scour sleeve body 1 achieves excellent protection, and the combination of the reverse arc sleeve 2 and the soil-entry sleeve 3 effectively guides water flow and reduces soil erosion around the pile.
[0041] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.
[0042] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.
[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.
Claims
1. A scour-resistant sleeve structure for offshore wind turbine foundations, characterized in that, include: The anti-scouring sleeve body (1) is sleeved around the offshore wind power foundation pile (4); The anti-erosion sleeve body (1) is divided into a continuously connected reverse arc section sleeve (2) and a soil-entry section sleeve (3). The upper edge tangent of the reverse arc sleeve (2) is parallel to the axial direction of the offshore wind power foundation pile (4).
2. The scour protection sleeve structure for offshore wind turbine foundations as described in claim 1, characterized in that, Limiting blocks (6) are fixedly installed on the sleeve (3) of the soil entry section. Each limiting block (6) has an insertion hole (7). A positioning rod (8) for positioning is set in the insertion hole (7). The bottom end of the positioning rod (8) is a cone-shaped hole for breaking the soil.
3. The scour protection sleeve structure for offshore wind turbine foundations as described in claim 1, characterized in that, The sleeve (3) is vertically inserted below the soil layer; the lower middle part of the anti-erosion sleeve body (1) is provided with regularly distributed circular holes (5).
4. The scour protection sleeve structure for offshore wind turbine foundations as described in claim 1, characterized in that, The outer and inner walls of the anti-erosion sleeve body (1) are respectively coated with a rough coating and an epoxy resin anti-corrosion layer.
5. The scour protection sleeve structure for offshore wind turbine foundations as described in claim 1, characterized in that, The top of the anti-scouring sleeve body (1) is provided with a through hole, which is adapted to the offshore wind power foundation pile (4).
6. The scour protection sleeve structure for offshore wind turbine foundations as described in claim 2, characterized in that, The positioning rod (8) is provided with a spiral protruding rib, which is adapted to the spiral groove opened on the inner wall of the insertion hole (7).
7. The scour protection sleeve structure for offshore wind turbine foundations as described in claim 1, characterized in that, The angle between the lower edge tangent of the reverse arc sleeve (2) and the axial direction of the soil-entry sleeve (3) is 120°. The inner diameter of the upper edge of the reverse arc sleeve (2) is 10mm larger than the outer diameter of the offshore wind power foundation pile (4) it protects, and the diameter of the lower edge is equal to the diameter of the soil-entry sleeve (3).
8. The scour protection sleeve structure for offshore wind turbine foundations as described in claim 3, characterized in that, The height of the sleeve (3) in the soil section is 2m, the diameter of the circular hole (5) is 1 / 5 of the diameter of the sleeve, and the hole is evenly distributed along the circumference of the sleeve.