Scouring protection device for offshore wind power foundation pile
By laying a layer of riprap and an interlaced grid structure of waste tires around the offshore wind turbine foundation piles, the stability problem of offshore wind turbine foundation piles under ocean current scouring was solved, and the ability to resist scouring and absorb vibration was improved.
Patent Information
- Application Number
- CN202511411017.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2025-11-21
AI Technical Summary
Existing offshore wind turbine foundations are prone to displacement and damage under the scouring of waves and currents, leading to continuous damage to the seabed structure and affecting the stability and scouring resistance of the foundations.
A layer of riprap is laid around the offshore wind turbine foundation piles, and then staggered first and second anti-scour layers are set on top of it. A grid structure made of waste tires and connecting cables is used, combined with biomimetic grass and counterweights to enhance anti-scour and vibration absorption capabilities.
It effectively reduces the risk of seabed erosion by ocean currents, enhances the erosion resistance and vibration absorption capacity of offshore wind power foundation piles, prevents the rockfill layer from being eroded into pits, and improves the stability and vibration resistance of the seabed.
Smart Images
Figure CN120990168A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of wind power equipment, in particular to a scour protection device for offshore wind power pile. BACKGROUND
[0002] Wind energy is a renewable green resource, which has the characteristics of abundant resources and relatively stable supply. The utilization of wind energy is conducive to reducing the consumption of fossil fuels and plays a positive role in reducing carbon emissions. Among them, offshore wind power has the characteristics of high energy density and small land occupation, and its influence in the field of green energy power generation is increasingly prominent. At present, the protection measures for offshore wind power piles mainly adopt armored protection, that is, the anti-scouring ability of the sediment around the offshore wind power pile is increased to ensure the stability of the offshore wind power pile. In related technologies, in order to ensure the anti-scouring ability of the offshore wind power pile, a sandstone layer is usually laid around the offshore wind power pile, and an old tire is buried on the sandstone layer to play a role in reinforcing the seabed around the offshore wind power pile. However, under the long-term scouring of waves and currents, the old tire is prone to displacement, and the sandstone is prone to being scoured out of a large number of pits, thereby causing continuous damage to the seabed structure and direct scouring and damage to the offshore wind power pile by the current. SUMMARY
[0003] The purpose of the present application is to provide a scour protection device for offshore wind power pile, which has strong anti-scouring performance and strong vibration absorption capacity.
[0004] To achieve this purpose, the present application adopts the following technical solutions:
[0005] A scour protection device for offshore wind power pile is provided, which comprises a riprap layer, a first anti-scouring layer and a second anti-scouring layer. The riprap layer is arranged around the offshore wind power pile. The riprap layer is sandwiched between the seabed and the offshore wind power pile. The laying radius of the riprap layer gradually decreases from the top surface to the bottom surface. The first anti-scouring layer and the second anti-scouring layer are both arranged around the offshore wind power pile. The second anti-scouring layer is arranged on the top surface of the riprap layer. The second anti-scouring layer comprises a second connecting rope and a plurality of second old tires arranged in a grid shape. The second old tires are connected by the second connecting rope. The first anti-scouring layer is arranged on the top surface of the second anti-scouring layer. The first anti-scouring layer comprises a first connecting rope and a plurality of first old tires arranged in a grid shape. The first old tires are connected by the first connecting rope.
[0006] In one embodiment, the first old tires and the second old tires are arranged alternately, and the first old tires and the second old tires are connected and fixed.
[0007] In one of the embodiments, a connecting assembly is further included, the connecting assembly comprises a first connecting head arranged on the first waste tire and a second connecting head arranged on the second waste tire, and the first connecting head is clamped and fixed with the second connecting head.
[0008] In one of the embodiments, the first scour protection layer comprises a plurality of first sub-modules, the plurality of first sub-modules are arranged around the offshore wind power pile, the first sub-module comprises a first frame and a plurality of first waste tires arranged in the first frame, and the first waste tires located at the periphery of the first sub-module are connected with the first frame through the first connecting ropes.
[0009] The second scour protection layer comprises a plurality of second sub-modules, the plurality of second sub-modules are arranged around the offshore wind power pile, the second sub-module comprises a second frame and a plurality of second waste tires arranged in the second frame, and the second waste tires located at the periphery of the second sub-module are connected with the second frame through the second connecting ropes.
[0010] In one of the embodiments, along the circumferential direction of the offshore wind power pile, two adjacent first frames are connected and fixed, and two adjacent second frames are connected and fixed.
[0011] In one of the embodiments, some of the first waste tires and some of the second waste tires are provided with counterweights.
[0012] In one of the embodiments, in the first scour protection layer, the diameters of the first waste tires located at the outer layer are greater than the diameters of the first waste tires located at the inner layer; and in the second scour protection layer, the diameters of the second waste tires located at the outer layer are greater than the diameters of the second waste tires located at the inner layer.
[0013] In one of the embodiments, the riprap layer comprises gravel and sandbags, and the gravel and the sandbags are interlaced and distributed.
[0014] In one of the embodiments, the first scour protection layer and / or the second scour protection layer is provided with bionic grass.
[0015] In one of the embodiments, the spacing between the peripheral part of the first scour protection layer and the offshore wind power pile is L1, the spacing between the peripheral part of the second scour protection layer and the offshore wind power pile is L2, and L1 < L2.
[0016] The beneficial effects of the present application compared with the prior art are as follows:
[0017] The scour protection device of the offshore wind power pile of the present application is characterized by laying a round-taishaped riprap layer around the offshore wind power pile, which can cover a larger area of seabed, reduce the risk of the surrounding seabed being scoured by the sea current, and make the lower seabed closer to the offshore wind power pile, which is conducive to absorbing the vibration on the offshore wind power pile by using the soft seabed. Meanwhile, the first and second scour protection layers covering the riprap layer can reduce the scouring damage of the riprap layer by the sea current. Therefore, the scour protection device has the characteristics of strong scour protection performance and strong vibration absorption capacity. BRIEF DESCRIPTION OF DRAWINGS
[0018] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.
[0019] Figure 1 The figure is a schematic view of the scour protection device of the offshore wind power pile of the present application.
[0020] Figure 2 The figure is a schematic view of the connection of the first and second waste tires of the present application.
[0021] Figure 3 The figure is a schematic view of the first group module of an embodiment of the present application.
[0022] Figure 4 The figure is a schematic view of the first group module of another embodiment of the present application.
[0023] Figure 5 The figure is a partial schematic view of the first scour protection layer of the present application.
[0024] In the figure:
[0025] 1, first scour protection layer; 11, first waste tire; 12, first connecting cable; 13, first frame; 14, ear plate; 15, U-shaped screw; 16, first fixing pin; 17, mounting hole; 2, second scour protection layer; 21, second waste tire; 22, second connecting cable; 23, second fixing pin; 3, riprap layer; 4, counterweight; 5, connecting assembly; 6, offshore wind power pile; 7, seabed; 8, bionic grass. DETAILED DESCRIPTION
[0026] To make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present application will be further described below with reference to the accompanying drawings and through specific embodiments.
[0027] As Figures 1 to 3As shown, the present application provides a scour protection device for offshore wind power pile (hereinafter referred to as scour protection device), which is used for providing scour protection for offshore wind power pile 6. The scour protection device comprises a first scour protection layer 1, a second scour protection layer 2 and a riprap layer 3. Among them, the riprap layer 3 is arranged around the offshore wind power pile 6, and the riprap layer 3 is clamped between the seabed 7 and the offshore wind power pile 6. The top surface of the riprap layer 3 is flush with the surface of the seabed 7 or close to the surface of the seabed 7. From the top surface to the bottom surface of the riprap layer 3, the laying radius of the riprap layer 3 gradually decreases. It can also be understood that, along the axial direction of the offshore wind power pile 6, the cross section of the riprap layer 3 is circular, the riprap layer 3 is circular truncated cone, and the laying area of the riprap layer 3 presents the state of top large and bottom small. The first scour protection layer 1 and the second scour protection layer 2 are arranged around the offshore wind power pile 6, the second scour protection layer 2 is arranged on the top surface of the riprap layer 3, and the first scour protection layer 1 is arranged on the top surface of the second scour protection layer 2. The first scour protection layer 1 and the second scour protection layer 2 are similar in structure, the first scour protection layer 1 comprises a plurality of first waste tires 11 and a first connecting rope 12, the plurality of first waste tires 11 are distributed in a grid shape, and adjacent first waste tires 11 are connected by the first connecting rope 12. The second scour protection layer 2 comprises a plurality of second waste tires 21 and a second connecting rope 22, the plurality of second waste tires 21 are distributed in a grid shape, and adjacent second waste tires 21 are connected by the second connecting rope 22.
[0028] It can be understood that the riprap layer 3 mainly comprises gravel blocks, which are harder than the seabed 7 and are not easy to be impacted by seawater to form pits. On the one hand, the riprap layer 3 is pressed on the seabed 7 around the offshore wind power pile 6, reducing the risk of scouring the surrounding seabed 7; on the other hand, the riprap layer 3 directly provides protection for the offshore wind power pile 6, blocking the seawater from directly scouring the offshore wind power pile 6. In addition, due to the circular truncated cone shape of the riprap layer 3, and the laying area of the upper layer is larger than that of the lower layer, this structure can press the seabed 7 with a larger area on one hand, reducing the risk of the surrounding seabed 7 being scoured by seawater; on the other hand, the seabed 7 of the lower layer can be closer to the offshore wind power pile 6, so that the strong vibration of the offshore wind power pile 6 caused by strong wind can be better transmitted to the relatively soft seabed 7, thereby improving the vibration absorption capacity of the entire scour protection device, and the offshore wind power pile 6 has strong anti-vibration performance. At the same time, by sequentially arranging the second scour protection layer 2 and the first scour protection layer 1 on the top surface of the riprap layer 3, the first waste tire 11 and the second waste tire 21 are used to provide scour protection for the riprap layer 3. The first waste tire 11 and the second waste tire 21 have certain elasticity and good energy absorption effect. When the waves or currents flow through the surrounding area of the offshore wind power pile 6, their kinetic energy can be consumed by the first scour protection layer 1 and the second scour protection layer 2, thereby avoiding the riprap layer 3 from being scoured into pits, which is conducive to preventing the seabed 7 from being exposed.
[0029] Specifically, the first anti-scour layer 1 is in a net structure, and the second anti-scour layer 2 is in a net structure. The first waste tires 11 in the first anti-scour layer 1 are staggered with the second waste tires 21 in the second anti-scour layer 2. This structure makes the distribution of the first waste tires 11 and the second waste tires 21 on the top surface of the riprap layer 3 more uniform, thereby improving the anti-scour effect. The first waste tires 11 and the second waste tires 21 are connected and fixed. The scour protection device further comprises a connecting assembly 5 for fixing the first waste tires 11 and the second waste tires 21. This structure makes the first anti-scour layer 1 and the second anti-scour layer 2 connected and fixed, which is conducive to improving the overall anti-scour capacity of the first anti-scour layer 1 and the second anti-scour layer 2, and avoiding deformation or displacement caused by too strong sea current scour in local areas. The connecting assembly 5 uses a connecting device that has been maturely applied in the art, and the specific structure and working principle are not described here. The connecting assembly 5 comprises a first connecting head mounted on the first waste tire 11 and a second connecting head mounted on the second waste tire 21, and the first connecting head and the second connecting head are fixed by insertion or clamping. To facilitate installation, the first connecting head is arranged on the outer wall of the first waste tire 11, and the second connecting head is arranged on the inner wall of the second waste tire 21, so as to adapt to the staggered distribution structure of the first waste tire 11 and the second waste tire 21. Of course, in other embodiments, the first anti-scour layer 1 and the second anti-scour layer 2 can also be fixed by using a rope lashing method.
[0030] Specifically, to further reinforce the first anti-scour layer 1 and the second anti-scour layer 2, the first anti-scour layer 1 further comprises a first fixing pin 16, and the second anti-scour layer 2 further comprises a second fixing pin 23. The first fixing pin 16 is arranged at the bottom of the first waste tire 11, and the first fixing pin 16 is inserted in the riprap layer 3. The second fixing pin 23 is arranged at the bottom of the second waste tire 21, and the second fixing pin 23 is inserted in the riprap layer 3 or the seabed 7.
[0031] Specifically, the scour protection device further comprises a counterweight 4, which can be made of concrete. Part of the first waste tires 11 and part of the second waste tires 21 are provided with the counterweight 4. The purpose of installing the counterweight 4 is to increase the overall weight of the first anti-scour layer 1 and the second anti-scour layer 2, and reduce the risk of displacement of the first waste tires 11 and the second waste tires 21 by sea current scour.
[0032] Specifically, in the first scour protection layer 1, the diameter of the first waste tire 11 located at the outer layer is greater than the diameter of the first waste tire 11 located at the inner layer. It can be understood that when the sea current passes through the surrounding area of the offshore wind power pile 6, the sea current moves from the outer layer of the first scour protection layer 1 to the inner layer. The first waste tire 11 with a larger diameter is arranged at the outer layer, which can use the large-diameter tire with relatively stronger stability to resist the strong kinetic energy of the sea current, thereby improving the scour protection performance of the entire first scour protection layer 1. Similarly, in the second scour protection layer 2, the diameter of the second waste tire 21 located at the outer layer is greater than the diameter of the second waste tire 21 located at the inner layer.
[0033] Specifically, the riprap layer 3 includes gravel and sandbags, and the gravel and sandbags are interlaced and distributed. The combination of gravel and sandbags is beneficial to improve the overall scour protection performance of the riprap layer 3. At the same time, since the gravel is mixed with the sandbags, the riprap layer 3 as a whole has a certain elasticity, which is beneficial to absorb the vibration energy on the offshore wind power pile 6. In the embodiment, the laying thickness of the riprap layer 3 is 1.5m-2m.
[0034] Specifically, the scour protection device further comprises a bionic grass 8. The bionic grass 8 is installed on the first scour protection layer 1, or installed on the second scour protection layer 2. Or the bionic grass 8 is installed on both the first scour protection layer 1 and the second scour protection layer 2. The bionic grass 8 can be installed on the periphery of the first scour protection layer 1 and the second scour protection layer 2, or arranged on the top surface of the entire first scour protection layer 1 and the second scour protection layer 2. By arranging the bionic grass 8, it is beneficial to block the silt in the sea current, so that the silt in the sea current is deposited on the first scour protection layer 1 and the second scour protection layer 2, thereby playing a reinforcing role on the scour protection device.
[0035] Specifically, the distance between the periphery of the first scour protection layer 1 and the offshore wind power pile 6 is L1, the distance between the periphery of the second scour protection layer 2 and the offshore wind power pile 6 is L2, and L1
[0036] In one of the optional embodiments, referring to Figure 3 and Figure 5As shown, the first scour protection layer 1 comprises a plurality of first sub-modules, which are arranged around the offshore wind power pile 6. The first sub-module comprises a first frame 13 and a plurality of first waste tires 11, which are arranged in a grid pattern inside the first frame 13 and are connected and fixed by the first connecting ropes 12 between adjacent first waste tires 11. The first frame 13 is a square frame. The first waste tires 11 located at the periphery of the first sub-module are connected with the first frame 13 by the first connecting ropes 12. The purpose of this structure is to modularize the first scour protection layer 1, so that a plurality of first waste tires 11 can be assembled into a first sub-module onshore or on a ship, and then a plurality of first sub-modules can be directly transported to the seabed for installation, which is beneficial to reduce the installation difficulty and improve the installation efficiency. The second scour protection layer 2 has a similar structure to the first scour protection layer 1, and comprises a plurality of second sub-modules arranged around the offshore wind power pile 6. The second sub-module comprises a second frame and a plurality of second waste tires 21 arranged in the second frame. Adjacent second waste tires 21 are connected and fixed by second connecting ropes 22. The second waste tires 21 located at the periphery of the second sub-module are connected with the second frame by the second connecting ropes 22.
[0037] To ensure the overall stability of the first scour protection layer 1 and the second scour protection layer 2, adjacent two first frames 13 are connected and fixed along the circumferential direction of the offshore wind power pile 6, and adjacent second frames are connected and fixed. Specifically, the first scour protection layer 1 further comprises an ear plate 14 and a U-shaped screw 15. The ear plate 14 is arranged on the outer wall of the first frame 13, and the ear plate 14 is provided with a mounting hole 17 for penetrating the U-shaped screw 15. The two ends of the U-shaped screw 15 are respectively penetrated into the ear plates 14 on the adjacent two first frames 13, and then fixed by nuts. The diameter of the mounting hole 17 is larger than the diameter of the U-shaped screw 15, so that the adjacent two first frames 13 can move a certain distance relative to each other, thereby improving the vibration absorption capacity.
[0038] In another embodiment, referring to Figure 4 As shown, the first frame 13 has a fan-shaped structure, a plurality of first waste tires 11 are arranged in a grid pattern inside the first frame 13, adjacent first waste tires 11 are connected by first connecting ropes 12, and the outermost first waste tires 11 are connected with the first frame 13 by the first connecting ropes 12. In this embodiment, the first frame 13 is arranged in a fan-shaped structure to adapt to the requirement of arranging a plurality of first sub-modules in a ring around the offshore wind power pile 6, so that the first sub-modules can be arranged more closely.
[0039] The beneficial effects of the embodiment are: by laying the round-taipan-shaped riprap layer 3 around the offshore wind power pile 6, on the one hand, the riprap layer 3 can cover a larger area of the seabed 7, reducing the risk of the surrounding seabed 7 being eroded by the sea current, on the other hand, the lower seabed 7 can be closer to the offshore wind power pile 6, which is conducive to absorbing the vibration on the offshore wind power pile 6 by using the soft seabed 7. At the same time, the first anti-erosion layer 1 and the second anti-erosion layer 2 are used to cover the riprap layer 3, which can reduce the erosion and damage of the riprap layer 3 by the sea current. Therefore, the erosion protection device has the characteristics of strong anti-erosion performance and strong vibration absorption capacity.
[0040] The above is only the preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed, and the content of the specification should not be understood as a limitation of the present application.
Claims
1. A scour protection device for offshore wind turbine foundation piles, characterized in that, The system includes a riprap layer, a first scour protection layer, and a second scour protection layer. The riprap layer is arranged around the offshore wind turbine foundation piles, sandwiched between the seabed and the offshore wind turbine foundation piles. The riprap layer's laying radius gradually decreases from its top to its bottom surface. Both the first and second scour protection layers surround the offshore wind turbine foundation piles. The second scour protection layer is located on the top surface of the riprap layer and includes a second connecting cable and several second waste tires arranged in a grid pattern. Adjacent second waste tires are connected by the second connecting cable. The first scour protection layer is located on the top surface of the second scour protection layer and includes a first connecting cable and several first waste tires arranged in a grid pattern. Adjacent first waste tires are connected by the first connecting cable.
2. The scour protection device for offshore wind turbine foundation piles according to claim 1, characterized in that, The first waste tire and the second waste tire are distributed alternately, and the first waste tire and the second waste tire are connected and fixedly connected.
3. The scour protection device for offshore wind turbine foundation piles according to claim 2, characterized in that, It also includes a connecting component, which includes a first connector disposed on the first waste tire and a second connector disposed on the second waste tire, wherein the first connector and the second connector are snapped together and fixed.
4. The scour protection device for offshore wind turbine foundation piles according to claim 1, characterized in that, The first anti-scour layer includes multiple first group modules, which are arranged around the offshore wind power foundation pile. Each first group module includes a first frame and multiple first waste tires disposed within the first frame. The first waste tires located outside the first group module are connected to the first frame via the first connecting cable. The second scour protection layer includes multiple second group modules, which are arranged around the offshore wind power foundation pile. Each second group module includes a second frame and multiple second waste tires disposed within the second frame. The second waste tires located on the periphery of the second group module are connected to the second frame via the second connecting cable.
5. The scour protection device for offshore wind turbine foundation piles according to claim 4, characterized in that, Along the circumferential direction of the offshore wind power foundation pile, two adjacent first frames are connected and fixed, and two adjacent second frames are connected and fixed.
6. The scour protection device for offshore wind turbine foundation piles according to claim 1, characterized in that, Some of the first waste tires and some of the second waste tires are equipped with counterweights.
7. The scour protection device for offshore wind turbine foundation piles according to claim 1, characterized in that, In the first anti-erosion layer, the diameter of the first waste tire located on the outer layer is larger than the diameter of the first waste tire located on the inner layer; in the second anti-erosion layer, the diameter of the second waste tire located on the outer layer is larger than the diameter of the second waste tire located on the inner layer.
8. The scour protection device for offshore wind turbine foundation piles according to any one of claims 1 to 7, characterized in that, The riprap layer comprises gravel and sandbags, which are interwoven and distributed together.
9. The scour protection device for offshore wind turbine foundation piles according to any one of claims 1 to 7, characterized in that, The first erosion protection layer and / or the second erosion protection layer are provided with biomimetic grass.
10. The scour protection device for offshore wind turbine foundation piles according to any one of claims 1 to 7, characterized in that, The distance between the periphery of the first scour protection layer and the offshore wind power foundation pile is L1, and the distance between the periphery of the second scour protection layer and the offshore wind power foundation pile is L2, where L1 < L2.