CN110965569A - Umbrella type anti-scouring structure for offshore wind power single-pile foundation - Google Patents
Umbrella type anti-scouring structure for offshore wind power single-pile foundation Download PDFInfo
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- CN110965569A CN110965569A CN201911386963.9A CN201911386963A CN110965569A CN 110965569 A CN110965569 A CN 110965569A CN 201911386963 A CN201911386963 A CN 201911386963A CN 110965569 A CN110965569 A CN 110965569A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an umbrella-type anti-scouring structure for an offshore wind power single-pile foundation, which aims to solve the problem that the offshore wind power single-pile foundation in the prior art is easily scoured and damaged. The umbrella comprises a single pile, a central ring beam, umbrella ribs and an umbrella fabric, wherein the central ring beam is sleeved outside the single pile, the umbrella ribs are radially connected to the outer side of the central ring beam, the inner ends of the umbrella ribs are rotatably connected with the outer side of the central ring beam, and the umbrella fabric is laid on the top surface of the umbrella ribs. The invention has simple structure, can realize the opening and closing operation, is convenient to transport and install in the closed state, and saves the construction cost; the edges of the umbrella surface structure are likely to be scoured, the outer ends of the umbrella ribs and the edge ballast sand rib rows can automatically adjust the posture to adapt along with the descending of the sea bed surface, the fan foundation is protected for a long time, and the maintenance cost in the operation period is reduced.
Description
Technical Field
The invention relates to the technical field of offshore wind power single pile foundation protection, in particular to an offshore pile foundation anti-scouring device for protecting a pile surrounding soil body by utilizing an umbrella type structure.
Background
The offshore wind power single pile foundation is usually composed of a single large-diameter steel pipe, and the lower part of the offshore wind power single pile foundation is deep into the soil to provide bearing capacity; the middle part is immersed in water to bear the long-term marine environmental effects of waves, ocean currents, tides, marine organism growth and the like; the upper part is connected with a tower cylinder of the wind driven generator through a flange. As an offshore wind turbine foundation type with the simplest structure, a single-pile foundation is the dominant foundation structure type of offshore wind power at present.
After the single-pile foundation is sunk, the motion form of water body particles caused by tide and wave can be obviously influenced. A horseshoe vortex is formed in front of a forward flow position of the single-pile foundation, a vortex karman vortex street is formed behind a backward flow position of the single-pile foundation, and flow lines on two sides of the single-pile foundation shrink. The change of the local flow state can increase the shear stress of the water flow to the bottom bed, thereby improving the sand-carrying capacity of the water flow. If the bottom bed is susceptible to erosion, scour pits may form locally in the mono-pile foundation, thereby affecting the stability of the structure.
Aiming at the problem that the offshore wind power single-pile foundation is easy to be scoured and damaged, most of the existing projects adopt bottom protection and impact reduction protection measures, mainly utilize protective layers mainly comprising riprapping stones, sand bags, sand quilts and the like to carry out gland protection on scouring influence areas on the periphery of a pile foundation, can not effectively isolate water flow around the pile, and is difficult to obtain reliable scouring protection effects.
Disclosure of Invention
The invention aims to overcome the problem that an offshore wind power single pile foundation in the prior art is easy to be scoured and damaged, and provides an umbrella type scour prevention structure for the offshore wind power single pile foundation, which utilizes an umbrella type scour prevention structure to directly cover soil bodies around piles, adjusts the water flow direction through a water-proof umbrella cover structure, prevents the soil bodies around the piles from being scoured by water flow and enhances the protection effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to an offshore wind power single-pile foundation umbrella type anti-scouring structure which comprises a single pile, a central ring beam, umbrella ribs and an umbrella cover, wherein the central ring beam is sleeved outside the single pile, the umbrella ribs are radially connected to the outer side of the central ring beam, the inner ends of the umbrella ribs are rotatably connected with the outer side of the central ring beam, and the umbrella cover is laid on the top surface of the umbrella ribs.
Preferably, a plurality of supporting brackets are arranged around the side face of the single pile, the supporting brackets are all located at the same height, the bottom of the central ring beam is fixed on the supporting brackets, and a plurality of wedge-shaped plugs are inserted into a gap between the inner side of the central ring beam and the single pile.
Preferably, the cross section of the central ring beam is in an inverted L-shaped structure, the opening of the L-shaped structure faces the outside, a plurality of umbrella ribs are arranged around the outside of the central ring beam at equal intervals, and the inner ends of the umbrella ribs are connected with the central ring beam through a horizontal rotating shaft.
Preferably, the central ring beam is provided with a limiting rubber block above the inner end of the umbrella rib.
Preferably, the top surface of the central ring beam is provided with a plurality of lifting lugs.
Preferably, the top surface of each umbrella rib is provided with an unfolding lug.
Preferably, one or more ribs are provided with a plurality of submarine cable supports along the axial direction, one side of each rib is provided with a J-shaped cable pipe, a submarine cable is erected on each submarine cable support and connected with the lower ends of the J-shaped cable pipes, and the outer sides of the submarine cables are sleeved with bending limiters.
Preferably, each submarine cable support comprises two support inclined struts and a support cross strut, the inclined connection rib of the two support inclined struts is of a V-shaped structure, an included angle between the two support inclined struts is 60 degrees, the support cross strut is arranged between the two support inclined struts, and the submarine cable is erected above the support cross strut and located between the two support inclined struts.
Preferably, when the umbrella cover is in an unfolding state, the included angle between the umbrella ribs and the horizontal plane is 5-10 degrees.
The invention has the beneficial effects that: (1) the umbrella type anti-scouring structure directly covers the soil body around the pile, and the water flow direction is adjusted through the water-isolating umbrella cover structure, so that the soil body around the pile is prevented from being scoured by water flow, and the protection effect is enhanced; (2) the invention has simple structure, can realize the opening and closing operation, is convenient to transport and install in the closed state, and saves the construction cost; (3) the edges of the umbrella surface structure are likely to be scoured, the outer ends of the umbrella ribs and the edge ballast sand rib rows can automatically adjust the posture to adapt along with the descending of the sea bed surface, the fan foundation is protected for a long time, and the maintenance cost in the operation period is reduced. (4) The invention also considers the leading-out of the submarine cable of the wind turbine generator, and solves the problem that the submarine cable access end is easy to fatigue and strain under the circulation action of water flow.
Drawings
FIG. 1 is an elevation view of the offshore wind power single pile foundation umbrella type anti-scouring structure.
FIG. 2 is a top view of the offshore wind power single pile foundation umbrella type anti-scouring structure.
FIG. 3 is a detailed connection diagram of a central ring beam of the offshore wind power single-pile foundation umbrella type anti-scouring structure.
FIG. 4 is a detailed view of the cable support of the umbrella type anti-scouring structure of the offshore wind power single pile foundation of the invention
In the figure:
1. single pile; 2. supporting the bracket; 3. a central ring beam; 4. lifting the lifting lug; 5. a horizontal rotating shaft; 6. a limiting rubber block; 7. umbrella ribs; 8. unfolding the lifting lug; 9. a sea cable support; 901. a bracket diagonal bracing; 902. a support cross brace; 10. an umbrella cover; 11. sand rib rows; 12. a wedge block; 13. a cable J-tube; 14. a bending limiter; 15. a sea cable.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in figure 1, the offshore wind power single pile foundation umbrella type anti-scour structure comprises a single pile 1, a central ring beam 3, umbrella ribs 7 and an umbrella cover 10, wherein the central ring beam 3 is sleeved outside the single pile 1, the umbrella ribs 7 are radially connected to the outer side of the central ring beam 3, the inner ends of the umbrella ribs 7 are rotatably connected with the outer side of the central ring beam 3, and the umbrella cover 10 is laid on the top surface of the umbrella ribs 7.
Encircle 1 side of single pile sets up a plurality of support brackets 2, support bracket 2 all is located unified height, 3 bottoms of central circle roof beam are fixed in on the support bracket 2, and a plurality of wedge stopper 12 have been pegged graft in the clearance between 3 inboards of central circle roof beam and the single pile 1.
The cross-sectional shape of center collar tie 3 is "L" shape structure of invering and "L" shape structure opening towards the outside, encircles center collar tie 3 outside equidistance interval sets up a plurality of ribs 7, and rib 7 inner rotates and connects horizontal pivot 5. The central ring beam 3 is provided with a limiting rubber block above the inner end of the umbrella rib 7.
The diameter of the single pile 1 in the embodiment is 6m, and the radius of the flushing influence area at the periphery of the pile foundation is expected to be 14 m. Four supporting brackets 2 are welded on the outer side of the single pile 1 in an annular mode, and the position of each supporting bracket 2 is 1-2 m higher than the original sea bed surface. The inner diameter of the central ring beam 3 is determined according to the outer diameter of the single pile 1 and the size of the rooting part of the upper pile body, and is slightly larger than the peripheral outline of the rooting part, so that the central ring beam 3 can be smoothly hung to the position of the support bracket 2. The limiting rubber block 6 prevents the umbrella ribs 7 from turning upwards. When the umbrella cover 10 is in an unfolded state, the included angle between the umbrella ribs 5 and the horizontal plane is 5-10 degrees.
The umbrella cover structure is made of geotextile or other fabrics with small permeability and high strength, covers the upper part of the umbrella ribs and is an octagonal pyramidal face after being unfolded. The edge of the umbrella fabric structure is sewn with sand rib rows, and the interior of the umbrella fabric structure is filled with medium coarse sand with good gradation. The umbrella cover is required to cover the peripheral scouring influence area of the whole pile foundation.
And a plurality of lifting lugs 4 are arranged on the top surface of the central ring beam 3. The top surface of each umbrella rib 7 is provided with an unfolding lifting lug 8.
A plurality of submarine cable supports 9 are arranged on one of the umbrella ribs 7 along the axial direction of the umbrella rib, a cable J-shaped pipe 13 is arranged on one side of the umbrella rib 7 of the single pile 1, a submarine cable 15 is erected on the submarine cable supports 9, the submarine cable 15 is connected with the lower ends of the cable J-shaped pipes 13, and a bending limiter 14 is sleeved on the outer side of the submarine cable 15.
Each submarine cable support 9 comprises two support inclined struts 901 and a support cross strut 902, the two support inclined struts 901 are obliquely connected with the umbrella ribs 7 to form a V-shaped structure, an included angle between the two support inclined struts 901 is 60 degrees, the support cross strut 902 is arranged between the two support inclined struts 901, and the submarine cable 15 is erected above the support cross strut 902 and located between the two support inclined struts 901.
The specific construction method of the umbrella type anti-scouring structure of the offshore wind power single-pile foundation of the embodiment is as follows: the whole umbrella type anti-scouring structure is prefabricated on the land, anti-corrosion measures need to be made on the surface of steel in advance, and sand filling and sealing are needed to be completed before sand rib discharge and transportation. The umbrella type anti-scouring structure is conveyed to a construction site in a closed state. After the single pile 1 is sunk, hoisting lifting lugs 4 on the central ring beam 3 are hoisted, and the single pile 1 is slowly lowered and sleeved from the position right above the single pile 1. When the umbrella ribs 7 are lowered to be in contact with the seabed surface, the unfolding lifting lugs 8 on the eight umbrella ribs 7 are lifted, so that the umbrella ribs 7 are unfolded, and then the umbrella cover 10 and the sand rib rows 11 are unfolded simultaneously. The umbrella-type scour prevention structure is continuously lowered, and the synchronism of the central ring beam 3 and the umbrella ribs 7 needs to be noticed in the lowering process, so that the lowering process is carried out slowly. After the central ring beam 3 is placed to the position of the support bracket 2, the lifting lugs 8 are continuously placed and unfolded, so that the outer end parts of the umbrella ribs 7 are placed on the surface of the sea bed. Six wedge-shaped blocks 12 are then inserted into the space between the central ring beam 3 and the mono pile 1 for reinforcement. Finally, the submarine cable 15 and the bending limiter 14 of the outer sleeve are pulled to the J-shaped cable pipe 13 from the submarine cable support 9 and are led into the wind generating set. After the final construction is finished, the umbrella ribs 7 and the umbrella cover 10 are in an inclined state, and the anti-scouring protection function is started to be exerted.
The invention is mainly applied to ocean engineering pile foundation structures, is particularly suitable for offshore wind power single pile foundations, but is not limited to the marine wind power single pile foundations. Any type of ocean engineering structure, equivalent changes and improvements made according to the scope of the present invention, should fall within the scope of the present invention.
Claims (9)
1. The utility model provides an offshore wind power single pile basis umbrella formula scour prevention structure, characterized by, includes single pile (1), central circle roof beam (3), rib (7) and umbrella face (10), and single pile (1) outside is located to central circle roof beam (3) cover, rib (7) are radially connected in the central circle roof beam (3) outside, rib (7) inner is rotated with central circle roof beam (3) outside and is connected, and umbrella face (10) lay in rib (7) top surface.
2. The umbrella type anti-scouring structure for the offshore wind and power single-pile foundation according to claim 1, wherein a plurality of supporting brackets (2) are arranged around the side face of the single pile (1), the supporting brackets (2) are all located at a uniform height, the bottom of the central ring beam (3) is fixed on the supporting brackets (2), and a plurality of wedge-shaped plugs (12) are inserted into a gap between the inner side of the central ring beam (3) and the single pile (1).
3. The offshore wind power single pile foundation umbrella type anti-scouring structure according to claim 2, wherein the cross-sectional shape of the central ring beam (3) is an inverted L-shaped structure, the opening of the L-shaped structure faces outwards, a plurality of umbrella ribs (7) are arranged around the outer side of the central ring beam (3) at equal intervals, and the inner ends of the umbrella ribs (7) are connected with the central ring beam (3) through horizontal rotating shafts (5).
4. The umbrella-type anti-scouring structure for the offshore wind power single-pile foundation according to claim 3, wherein a limiting rubber block is arranged above the inner ends of the umbrella ribs (7) of the central ring beam (3).
5. The umbrella-type anti-scouring structure for the offshore wind power single-pile foundation according to claim 1, wherein a plurality of lifting lugs (4) are arranged on the top surface of the central ring beam (3).
6. The umbrella-type anti-scour structure for offshore wind power single-pile foundations according to claim 1, wherein the top surface of each rib (7) is provided with an unfolding lug (8).
7. The umbrella-type anti-scouring structure for the offshore wind power single pile foundation according to claim 1, wherein one or more umbrella ribs (7) are provided with a plurality of submarine cable supports (9) along the axial direction of the umbrella ribs, one side of each umbrella rib (7) of the single pile (1) is provided with a J-shaped cable pipe (13), a submarine cable (15) is erected on each submarine cable support (9), the submarine cable (15) is connected with the lower end of the J-shaped cable pipe (13), and a bending limiter (14) is sleeved on the outer side of the submarine cable (15).
8. The umbrella-type anti-scouring structure for the offshore wind power single pile foundation according to claim 7, wherein each submarine cable support (9) comprises two support diagonal braces (901) and a support cross brace (902), the two support diagonal braces (901) are obliquely connected with umbrella ribs (7) to form a V-shaped structure, an included angle between the two support diagonal braces (901) is 60 degrees, the support cross brace (902) is arranged between the two support diagonal braces (901), and the submarine cable (15) is erected above the support cross brace (902) and located between the two support diagonal braces (901).
9. The umbrella-type anti-scouring structure of the offshore wind power single-pile foundation according to claim 1, wherein when the umbrella cover (10) is in an unfolded state, an included angle between the umbrella ribs (5) and a horizontal plane is 5-10 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911386963.9A CN110965569A (en) | 2019-12-29 | 2019-12-29 | Umbrella type anti-scouring structure for offshore wind power single-pile foundation |
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| CN201911386963.9A CN110965569A (en) | 2019-12-29 | 2019-12-29 | Umbrella type anti-scouring structure for offshore wind power single-pile foundation |
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|---|---|---|---|---|
| CN111663435A (en) * | 2020-06-08 | 2020-09-15 | 西南交通大学 | Foldable topography self-adaptation pier erodees protector |
| CN111764439A (en) * | 2020-07-14 | 2020-10-13 | 李思阅 | Self-maintenance anti-scouring device for offshore wind power pile foundation |
| CN112211215A (en) * | 2020-09-30 | 2021-01-12 | 同济大学建筑设计研究院(集团)有限公司 | Negative pressure ring reinforced rigid short pile foundation and installation method |
| CN112942405A (en) * | 2021-02-04 | 2021-06-11 | 中国长江三峡集团有限公司 | Quickly-assembled and anti-scouring combined offshore wind power foundation and method |
| CN113482060A (en) * | 2021-07-14 | 2021-10-08 | 中国长江三峡集团有限公司 | Anti-scouring device and method for pile foundation of ocean engineering structure |
| CN114108706A (en) * | 2022-01-27 | 2022-03-01 | 中国海洋大学 | Marine foundation erodees multiple protection system |
| CN114606985A (en) * | 2022-02-22 | 2022-06-10 | 中天科技集团海洋工程有限公司 | Anti-scouring device for offshore wind power single-pile foundation |
| CN114687384A (en) * | 2022-05-18 | 2022-07-01 | 江苏交水建智能装备研究院有限公司 | Umbrella-shaped thin film steel pipe pile scour prevention structure |
| CN114855707A (en) * | 2021-06-07 | 2022-08-05 | 喻昕蕾 | Silt-promoting repair device and method for local erosion pit |
| CN115075283A (en) * | 2021-03-16 | 2022-09-20 | 中国电建集团华东勘测设计研究院有限公司 | Anti-scouring structure for single pile foundation of offshore wind turbine generator and construction method of anti-scouring structure |
| CN115198808A (en) * | 2022-06-24 | 2022-10-18 | 广东华蕴海上风电科技有限公司 | Bionic grass installation method for preventing scouring of offshore wind power foundation |
| CN115492155A (en) * | 2022-09-26 | 2022-12-20 | 广东华蕴海上风电科技有限公司 | Construction method of sand gathering device for preventing scouring of offshore wind power foundation |
| CN115613561A (en) * | 2022-10-25 | 2023-01-17 | 中山大学 | Active repairing device for offshore wind power single-pile scouring pit |
| CN116104136A (en) * | 2023-03-20 | 2023-05-12 | 华北电力大学 | Offshore pile foundation scour protection device of umbrella type structure |
| WO2023151318A1 (en) * | 2022-02-11 | 2023-08-17 | 上海勘测设计研究院有限公司 | Self-maintaining anti-scouring device for offshore wind farm pile foundation |
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| CN111764439A (en) * | 2020-07-14 | 2020-10-13 | 李思阅 | Self-maintenance anti-scouring device for offshore wind power pile foundation |
| CN111764439B (en) * | 2020-07-14 | 2021-12-14 | 震兑工业智能科技有限公司 | Self-maintenance anti-scouring device for offshore wind power pile foundation |
| CN112211215A (en) * | 2020-09-30 | 2021-01-12 | 同济大学建筑设计研究院(集团)有限公司 | Negative pressure ring reinforced rigid short pile foundation and installation method |
| CN112942405A (en) * | 2021-02-04 | 2021-06-11 | 中国长江三峡集团有限公司 | Quickly-assembled and anti-scouring combined offshore wind power foundation and method |
| CN112942405B (en) * | 2021-02-04 | 2022-06-07 | 中国长江三峡集团有限公司 | Quickly-assembled and anti-scouring combined offshore wind power foundation and method |
| CN115075283A (en) * | 2021-03-16 | 2022-09-20 | 中国电建集团华东勘测设计研究院有限公司 | Anti-scouring structure for single pile foundation of offshore wind turbine generator and construction method of anti-scouring structure |
| CN114855707A (en) * | 2021-06-07 | 2022-08-05 | 喻昕蕾 | Silt-promoting repair device and method for local erosion pit |
| CN113482060A (en) * | 2021-07-14 | 2021-10-08 | 中国长江三峡集团有限公司 | Anti-scouring device and method for pile foundation of ocean engineering structure |
| CN114108706A (en) * | 2022-01-27 | 2022-03-01 | 中国海洋大学 | Marine foundation erodees multiple protection system |
| CN114108706B (en) * | 2022-01-27 | 2022-04-15 | 中国海洋大学 | Marine foundation erodees multiple protection system |
| WO2023151318A1 (en) * | 2022-02-11 | 2023-08-17 | 上海勘测设计研究院有限公司 | Self-maintaining anti-scouring device for offshore wind farm pile foundation |
| CN114606985A (en) * | 2022-02-22 | 2022-06-10 | 中天科技集团海洋工程有限公司 | Anti-scouring device for offshore wind power single-pile foundation |
| CN114687384A (en) * | 2022-05-18 | 2022-07-01 | 江苏交水建智能装备研究院有限公司 | Umbrella-shaped thin film steel pipe pile scour prevention structure |
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| CN115492155A (en) * | 2022-09-26 | 2022-12-20 | 广东华蕴海上风电科技有限公司 | Construction method of sand gathering device for preventing scouring of offshore wind power foundation |
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| CN115613561B (en) * | 2022-10-25 | 2023-05-23 | 中山大学 | Active repairing device for scouring pit of offshore wind power single pile |
| CN116104136A (en) * | 2023-03-20 | 2023-05-12 | 华北电力大学 | Offshore pile foundation scour protection device of umbrella type structure |
| CN116104136B (en) * | 2023-03-20 | 2023-11-10 | 华北电力大学 | Offshore pile foundation scour protection device of umbrella type structure |
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