CN115772910B - Scour prevention device for pile foundation of offshore wind turbine generator - Google Patents
Scour prevention device for pile foundation of offshore wind turbine generator Download PDFInfo
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- CN115772910B CN115772910B CN202111052378.2A CN202111052378A CN115772910B CN 115772910 B CN115772910 B CN 115772910B CN 202111052378 A CN202111052378 A CN 202111052378A CN 115772910 B CN115772910 B CN 115772910B
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- offshore wind
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- 230000002265 prevention Effects 0.000 title claims description 24
- 230000001681 protective effect Effects 0.000 claims abstract description 20
- 239000000945 filler Substances 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 6
- 238000009991 scouring Methods 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 5
- 241001474374 Blennius Species 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000001112 coagulating effect Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 239000010802 sludge Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Wind Motors (AREA)
Abstract
本发明公开了一种海上风电机组桩基防冲刷装置，包括防护堤，所述防护堤为环绕桩基设置的环状结构，所述防护堤与所述桩基之间形成环形空间，所述环形空间内设置有填充物。该防冲刷装置具有良好的防冲刷效果，提高了桩基的稳定性。
The present invention discloses an offshore wind turbine pile foundation anti-scour device, comprising a protective dike, the protective dike is an annular structure arranged around the pile foundation, an annular space is formed between the protective dike and the pile foundation, and a filler is arranged in the annular space. The anti-scour device has a good anti-scour effect and improves the stability of the pile foundation.
Description
Technical Field
The invention relates to the technical field of offshore wind power generation equipment, in particular to a pile foundation scour prevention device of an offshore wind turbine.
Background
The pile foundation of the offshore wind generating set is fixed on the sea floor, and along with the scouring of ocean currents, scouring pits are easy to appear on the periphery of the pile foundation, so that the contact surface of the pile foundation on a seabed mud layer is small, the rigidity and frequency of the pile foundation can be adversely affected, and the stability of wind power generation equipment is affected.
In order to prevent sludge around the pile foundation from being washed away by ocean currents, the method is adopted at present to throw stones around the pile foundation, but the stones are not fixed, so that the sludge can be washed away by the ocean currents for a long time, a large amount of sludge around the pile foundation is taken away, and the pile foundation is still unstable.
Disclosure of Invention
The invention aims to provide a scour prevention device for a pile foundation of an offshore wind turbine, which has good scour prevention effect and improves the stability of the pile foundation.
In order to solve the technical problems, the invention provides a pile foundation scour prevention device of an offshore wind turbine, which comprises a protective dike, wherein the protective dike is of a ring-shaped structure which is arranged around the pile foundation, an annular space is formed between the protective dike and the pile foundation, and a filler is arranged in the annular space.
According to the pile foundation scour prevention device for the offshore wind turbine, the protective dike is arranged around the pile foundation in a surrounding mode, the protective dike is of an annular structure, so that an annular space is formed between the protective dike and the pile foundation, and after the annular space is filled with the filler, the filler filled around the pile foundation is not easy to wash away by ocean currents under the blocking and protecting effects of the protective dike, and accordingly sludge around the pile foundation is prevented from being taken away.
According to the pile foundation scour prevention device of the offshore wind turbine, the edge part of the breakwater, which is far away from the pile foundation, is of an inclined structure, and the height of the edge part is gradually increased from the edge part to the pile foundation.
According to the pile foundation scour prevention device for the offshore wind turbine, the angle between the inclined structure and the seabed mud surface is 0-45 degrees.
According to the pile foundation scour prevention device for the offshore wind turbine, the bottom surface of the protective dike is provided with the protruding part structure protruding downwards.
The pile foundation scour prevention device of the offshore wind turbine comprises a plurality of annular convex ribs.
The pile foundation scour prevention device of the offshore wind turbine generator comprises the split-type embankment, wherein the split-type embankment comprises more than two embankment blocks, and the embankment blocks are spliced to form the embankment.
According to the pile foundation scour prevention device for the offshore wind turbine, the protection dyke is provided with the hanging ring for hanging.
According to the scour prevention device for the pile foundation of the offshore wind turbine, the annular step protruding upwards is arranged on the top surface of the part, close to the pile foundation, of the breakwater.
The pile foundation scour prevention device of the offshore wind turbine generator comprises the framework and the casting body, wherein the casting body and the framework form an integrated structure in a casting mode.
According to the pile foundation scour prevention device for the offshore wind turbine, the casting body is concrete or is a mixture of particles and coagulation materials after the fan blades are crushed.
According to the pile foundation scour prevention device for the offshore wind turbine, the framework comprises the reinforcement cage.
The offshore wind turbine pile foundation scour prevention device comprises at least one of stones, sand bags and seaweed organisms.
According to the scour prevention device for the pile foundation of the offshore wind turbine, the distance between the inner wall of the protective dike and the pile foundation is 2-3 times of the pile diameter of the pile foundation.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a pile foundation anti-scour device for an offshore wind turbine provided by the invention;
FIG. 2 is a schematic diagram of the structure of FIG. 1 from a top view;
fig. 3 is a schematic structural view of a embankment block in an embodiment;
Fig. 4 is a schematic view in the A-A direction of fig. 3.
Reference numerals illustrate:
Pile foundation 10;
Dykes 20, dykes 21, skeletons 201, circumferential ribs 211, radial ribs 212, erection ribs 213, convex structures 202, hanging rings 203, backing plates 231, inclined surfaces 204, annular steps 205;
And a filler 30.
Detailed Description
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
The scour prevention device provided by the embodiment is suitable for the application environment of a fixed pile foundation of a wind turbine generator set, including a single pile, a multi-pile, a fixed pile foundation of a gravity foundation or a jacket, and the like, and can be applied to any pile foundation fixed on the seabed.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an embodiment of a pile foundation anti-scour device for an offshore wind turbine according to the present invention, and fig. 2 is a schematic structural diagram of the pile foundation anti-scour device for an offshore wind turbine according to fig. 1 in a top view.
In this embodiment, the scour protection includes a breakwater 20, the breakwater 20 is an annular structure disposed around the pile foundation 10, and an annular space is formed between the breakwater 20 and the pile foundation 10, and is filled with a filler 30.
As shown in fig. 1, pile foundation 10 of the wind turbine is fixed on the seabed during actual installation, and extends into the seabed mud surface, and a protective dike 20 is arranged around pile foundation 10, and protective dike 20 is supported by the seabed mud surface.
After the arrangement, the filler 30 filled around the pile foundation 10 is not easy to be washed away by ocean currents under the blocking and protecting effects of the protective dike 20, and the sludge around the pile foundation 10 is not taken away by the ocean currents, so that the pile foundation has a good scour prevention effect. It will be appreciated that the protective handle 20 has a weight that is not easily washed away by seawater to protect the filling 30.
In the example shown in fig. 1 and 2, the embankment 20 has a circular ring structure, and it is understood that the shape of the embankment 20 is not limited to this, and may be a square ring, an elliptical ring, a polygonal ring, or a ring of other irregular shape, so long as it has a ring-shaped closed structure, and a space for installing the filler 30 can be formed between the ring-shaped closed structure and the pile foundation 10.
In practical application, the diameter of pile foundation 10 of offshore wind turbine generator system is usually great, and the height is also higher, for the convenience install the dyke 20 around pile foundation 10 that has installed, the dyke 20 can be for split type structure, including two at least dyke pieces 21, these dyke pieces 21 can splice and form the dyke 20, so, when installing, adopt hoisting equipment with the dyke piece 21 splice around pile foundation 10 can, also need not special connection between the adjacent dyke piece 21, easy to assemble and implement.
Of course, in the initial construction stage, an integrated breakwater 20 can be arranged, after the breakwater 20 is installed, the pile foundation 10 is installed again, and in the later operation and maintenance stage, if the breakwater 20 is to be newly added, the breakwater 20 can adopt a split structure, so that the construction is convenient.
In the embodiment shown in fig. 2, the embankment 20 is divided into four embankment blocks 21, which are assembled to form one embankment 20.
In this embodiment, the protection dike 20 includes a skeleton 201 and a casting body, the casting body forms an integral structure with the skeleton 201 by way of casting, specifically, the protection dike 20 may adopt a reinforced concrete structure, that is, the skeleton 201 is made of reinforced steel bars, and the casting material is reinforced concrete. Of course, for the divided structure of the embankment 20, each embankment block 21 is also integrally cast from the skeleton 201 and the casting material.
Referring to fig. 3 and fig. 4 together, fig. 3 is a schematic structural view of a dike block according to an embodiment, and fig. 4 is a schematic A-A of fig. 3.
In this embodiment, the framework 201 of the embankment block 21 includes circumferential ribs 211 extending in the circumferential direction, radial ribs 212 extending in the radial direction, and standing ribs 213 extending in the height direction, and the density of the circumferential ribs 211, the density of the radial ribs 212, and the density of the standing ribs 213 may be set according to practical application requirements, which are only exemplarily described in the drawings, and it is understood that the rib arrangement adaptability of the framework 201 varies when the embankment 20 takes other shapes.
For hoist and mount during convenient installation, still be equipped with hoist and mount usefulness rings 203 on the embankment 20, for convenient hoist and mount and follow-up installation, rings 203 set up the top surface at the embankment 20, on the basis that embankment 20 is reinforced concrete structure, rings 203 can be fixed through the backing plate 231 with reinforced concrete structure's skeleton 201 rigid coupling, can adopt threaded connection between rings 203 and the backing plate 231.
In a specific arrangement, the number and positions of the hanging rings 203 arranged on the top surface of the embankment 20 are based on the balance of the embankment 20 after being lifted. Of course, for the embankment blocks 21, it is considered that the balance of lifting of each embankment block 21 is provided with the lifting ring 203 thereon.
The framework 201 of the protective dike 20 adopts the structural form of the reinforcement cage, has better strength, can avoid cracking due to self weight after hoisting, and can play a good role in protection after construction and installation.
In order to avoid corrosion of the framework 201 of the steel bar structure by seawater on the sea floor, after concrete is poured, the concrete forms a protective layer with a certain thickness on the outer surface of the framework 201, and generally, the thickness of the protective layer is not less than 100mm, and can be adjusted according to practical application.
In addition to the above-described embankment 20 with a concrete structure, in other embodiments, the casting of the embankment 20 may be made of a mixture of particles and condensation materials crushed by fan blades, and the crushed fan blades may be retired blades. Other materials may be used for the casting body.
In this embodiment, the outer edge portion of the breakwater 20 far away from the pile foundation 10 is of an inclined structure, and is provided with an inclined surface 204, as shown in fig. 1, from the outer edge portion of the breakwater 20 to the direction of the pile foundation 10, the height of the inclined structure is gradually increased, so that when the breakwater 20 is arranged, after the breakwater 20 is washed out by seawater, the inclined surface 204 is contacted, the resistance of ocean currents is small, the stability of the breakwater 20 is facilitated, the mud surface of the outer edge portion of the breakwater 20 is prevented from being washed out, and long-term good contact between the breakwater 20 and the seabed mud surface is ensured.
The angle between the inclined surface 204 and the seabed mud surface may be set between 0 and 45 degrees. Is set according to the speed of ocean currents and the thickness of the seabed sludge.
In this embodiment, a protruding portion 202 protruding downward is provided on the bottom surface of the embankment 20, and when the embankment 20 is installed, the protruding portion 202 may extend into the mud on the sea floor, so that the friction between the embankment 20 and the mud surface on the sea floor may be enhanced, and the embankment 20 may be prevented from being displaced on the mud surface on the sea floor.
The form of the convex structure 202 may be varied, and the convex structure 202 may be integrally formed with the embankment 20 when the embankment 20 is manufactured, for example, when the skeleton 201 is manufactured, a protruding beam structure is provided at the bottom, and the convex structure 202 is formed when pouring.
Specifically, the protrusion structure 202 may be a plurality of annular ribs, as shown in fig. 1 and 4, each of which has a reinforcing bar beam fixedly connected to the skeleton 201 of the embankment 20, so as to ensure rigidity and strength of the annular rib. In one example, the annular ribs may be centered on the center of the pile foundation 10, and each 500mm interval is set to 200mm in radial dimension and height dimension, and of course, the interval between the annular ribs and the size of the annular ribs may be set according to practical needs.
The protrusion structure 202 may be in other forms besides the annular rib, for example, a rib extending along the radial direction of the embankment 20, or a plurality of protrusions, etc., as long as the protrusion from the bottom surface of the embankment 20 can be embedded in the seabed sludge, so as to increase the friction between the embankment 20 and the seabed sludge surface.
In this embodiment, the distance between the inner wall of the breakwater 20 and the pile foundation 10 is 2-3 times of the pile diameter of the pile foundation 10, in actual operation, the pile foundation 10 swings to cause sludge disturbance, and in general, the breakwater 20 is arranged within the range of 2-3 times of the pile diameter around the pile foundation 10, so that the influence of the sludge disturbance caused by the swinging of the pile foundation 10 on the breakwater 20 can be avoided, and of course, the distance range can be adjusted according to application requirements.
In this embodiment, the filler 30 filled between the embankment 20 and the pile foundation 10 includes at least one of stones, sand bags, and seaweed organisms. After filling, the top surface of the filler 30 is level with the top surface of the embankment 20.
In order to fill up as much of the packing 30 as possible, to ensure that the periphery of the pile foundation 10 is not affected by the washout, the embankment 20 may be provided with an upwardly protruding annular step 205 on the top surface of the inner edge portion of the pile foundation 10 close thereto, so that the height of the annular space formed between the inner wall of the embankment 20 and the pile foundation 10 is relatively high, and accordingly, more packing 30 may be filled.
The breakwater 20 of the scour protection device has the advantages that the structure is simple, the prefabricated forming is realized, the production and manufacturing difficulty is low, the practicability is high, the construction can be completed by utilizing hoisting equipment, the underwater operation is not needed in the construction process, only the specified position of the submerged seafloor is required to be hoisted by the breakwater blocks 21, and the complete circle of breakwater 20 can be spliced, so that the construction cost is low.
The invention provides the scour prevention device for the pile foundation of the offshore wind turbine. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (11)
1. The scour prevention device for the pile foundation of the offshore wind turbine generator is characterized by comprising a protective dike, wherein the protective dike is of an annular structure arranged around the pile foundation, an annular space is formed between the protective dike and the pile foundation, and a filler is arranged in the annular space;
The edge part of the breakwater, which is far away from the pile foundation, is of an inclined structure, and the height of the edge part is gradually increased from the edge part to the pile foundation;
The breakwater comprises a top surface and a bottom surface which are opposite, wherein the outer edge of the top surface, which is far away from the pile foundation, is connected with the outer edge of the bottom surface, which is far away from the pile foundation, through the inclined surface, and an annular step protruding upwards is arranged on the inner side of the top surface, which is close to the pile foundation.
2. The offshore wind turbine foundation anti-scouring device of claim 1, wherein the angle between the inclined structure and the seabed mud surface is 0-45 degrees.
3. The scour protection apparatus for a pile foundation of an offshore wind turbine according to claim 1, wherein the bottom surface of the embankment is provided with a protruding portion structure protruding downwards.
4. The offshore wind turbine foundation anti-scour device of claim 3, wherein the boss structure comprises a plurality of annular ribs.
5. The pile foundation scour prevention device of an offshore wind turbine generator according to claim 1, wherein the embankment is of a split structure and comprises more than two embankment blocks, and each embankment block is spliced to form the embankment.
6. The offshore wind turbine pile foundation scour protection apparatus of claim 1, wherein the embankment is provided with a lifting ring.
7. The offshore wind turbine foundation anti-scouring device of any one of claims 1-6, wherein the embankment comprises a framework and a casting body, and the casting body and the framework form an integrated structure in a casting manner.
8. The offshore wind turbine foundation anti-scouring device of claim 7, wherein the casting body is concrete or a mixture of crushed particles of fan blades and a coagulating material.
9. The offshore wind turbine foundation anti-scour device of claim 8, wherein the framework comprises a rebar cage.
10. The offshore wind turbine foundation anti-scour device of any one of claims 1-6, wherein the filler comprises at least one of rocks, sandbags, and seaweed organisms.
11. The offshore wind turbine foundation anti-scouring device of any one of claims 1-6, wherein the distance between the inner wall of the embankment and the foundation is 2-3 times the pile diameter of the foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111052378.2A CN115772910B (en) | 2021-09-08 | 2021-09-08 | Scour prevention device for pile foundation of offshore wind turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111052378.2A CN115772910B (en) | 2021-09-08 | 2021-09-08 | Scour prevention device for pile foundation of offshore wind turbine generator |
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| Publication Number | Publication Date |
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| CN115772910A CN115772910A (en) | 2023-03-10 |
| CN115772910B true CN115772910B (en) | 2024-12-20 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985838A (en) * | 2009-10-20 | 2011-03-16 | 中国石油大学(华东) | Method for preventing and controlling pile foundation washout of offshore oil platform |
| CN110397062A (en) * | 2019-07-15 | 2019-11-01 | 河北工业大学 | A reinforced composite single pile foundation for offshore wind turbines and its construction method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469547A (en) * | 2007-12-25 | 2009-07-01 | 周升融 | Device for preventing foundation from being hollowed |
| KR101662063B1 (en) * | 2016-05-18 | 2016-10-04 | 이신원 | Bridges and bridge scour scour prevention methods to prevent the ball |
| CN110886326A (en) * | 2019-11-11 | 2020-03-17 | 浙江大学 | Anti-scouring protection device for offshore wind power pile foundation and installation method |
| CN110984213B (en) * | 2019-12-19 | 2024-08-09 | 中国长江三峡集团有限公司 | Marine wind power single pile-friction cone composite foundation and construction method thereof |
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2021
- 2021-09-08 CN CN202111052378.2A patent/CN115772910B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985838A (en) * | 2009-10-20 | 2011-03-16 | 中国石油大学(华东) | Method for preventing and controlling pile foundation washout of offshore oil platform |
| CN110397062A (en) * | 2019-07-15 | 2019-11-01 | 河北工业大学 | A reinforced composite single pile foundation for offshore wind turbines and its construction method |
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| CN115772910A (en) | 2023-03-10 |
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