CN114991221A - Novel stone throwing shaft collar protective structure's offshore wind power pile foundation - Google Patents
Novel stone throwing shaft collar protective structure's offshore wind power pile foundation Download PDFInfo
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- CN114991221A CN114991221A CN202210425572.9A CN202210425572A CN114991221A CN 114991221 A CN114991221 A CN 114991221A CN 202210425572 A CN202210425572 A CN 202210425572A CN 114991221 A CN114991221 A CN 114991221A
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- Prior art keywords
- pile foundation
- wind power
- riprap
- offshore wind
- collar
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- 239000004575 stone Substances 0.000 title claims abstract description 9
- 230000001681 protective effect Effects 0.000 title claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 11
- 239000010959 steel Substances 0.000 abstract description 11
- 238000009991 scouring Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 2
- 230000001012 protector Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 8
- 238000009412 basement excavation Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
Classifications
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- 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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- 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
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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
- Y02E10/727—Offshore wind turbines
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Wind Motors (AREA)
- Foundations (AREA)
Abstract
The invention discloses an offshore wind power pile foundation protection measure for reducing scouring, introduces a new shaft collar design on the basis of stone throwing protection, and relates to the technical field of offshore pile foundations. This erode protector includes: the riprap assembly surrounds a pile within a certain range and is partially arranged in the groove of the collar. The shaft collar assembly is arranged on the outer side of the offshore wind power steel pipe pile and below the surface of the sea bed based on a balance scour pit design. The offshore wind power pile foundation provided by the invention is a method for reducing scouring in a certain range around the pile and controlling the horseshoe vortex to a certain extent, so that the offshore wind power steel pipe pile is protected, and the service life of the offshore wind power steel pipe pile is prolonged.
Description
Technical Field
The invention relates to the technical field of offshore wind power generation, in particular to a scouring protection device based on an offshore wind power steel pipe pile.
Background
The steel pipe pile is widely applied to ocean and offshore engineering such as a cross-sea bridge, a port and a dock, an offshore oil platform, offshore wind power and the like due to the characteristics of high bearing capacity, good flexibility, high construction speed and the like, and develops into an important basic form of a building on water. However, many problems are often encountered during the use of the steel pipe pile. Under the influence of factors such as ocean waves, ocean currents, tidal currents and the like, the steel pipe piles block the flow of seawater, the water flow on the incident surface flows downwards, the flow velocity is accelerated, and horseshoe-shaped vortexes are formed; the back flow surface forms a tail vortex due to the streaming action of the seawater. When the surface of the seabed is mainly sandy soil, the U-shaped vortex and the tail vortex cause the soil mass around the pile to swell, the sand digging phenomenon occurs, and a larger scouring pit is formed. The formation of the scouring pit reduces the depth of the pile into the soil, and the friction force and resistance loss of the pile side soil finally result in the reduction of the horizontal bearing capacity and the vertical bearing capacity of the pile foundation, so that the safety problem of the fan structure is caused.
The existing scouring protection comprises active protection and passive protection, but most of the existing scouring protection is carried out on bridges and river bank structures, the active protection cannot achieve the expected scouring protection effect yet under the influence of the ocean complex environment, the passive protection is mostly used for constructing surface soil mass filling protection structures, and the durability of the protection structures is worthy of deep consideration.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a scouring protection device based on an offshore wind power steel pipe pile.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a erode protector based on offshore wind power steel-pipe pile, includes: the ring collar component is arranged on the outer side of the offshore wind power steel pipe pile on the side wall of the offshore wind power steel pipe pile, and the riprap component is filled in the groove between the periphery of the offshore wind power steel pipe pile and the ring collar component.
Further, the riprap is covered on the surface of the seabed around the pile.
Further, the riprap covers the seabed in a trapezoidal shape, and forms an included angle of 60 degrees with the seabed.
Further, the top surface of the shaft ring is flush with the surface of the sea bed.
Further, the collar groove is filled with riprap.
Compared with the prior art, the invention has the beneficial effects that: a circular area is first dug around the pile foundation to embed the collar into the seabed surface. After excavation is completed, the collar is assembled around the pile foundation seabed surface within the excavation range (full-scale field installation). It must be ensured that the top surface of the collar is level with the surrounding seabed, and then a seamless transition can be made by filling undisturbed soil around the collar. By designing the shape of the collar with symmetry, the mounting can be facing any direction, and the multi-directional flow can be accommodated. In addition, as a precaution, the collar sides are inclined outwardly. This is done to help reduce the occurrence of flushing around the collar. Riprap covering the seabed around the pile can also reduce the scour around the pile.
Drawings
Fig. 1 is a schematic structural diagram of a front view of an offshore wind power pile foundation with a riprap collar protection structure.
Fig. 2 is a schematic side view of a stone throwing component of the offshore wind power pile foundation with the stone throwing collar protection structure.
Fig. 3 is a schematic top view of the offshore wind power pile foundation with the riprap collar protection structure.
Fig. 4 is a schematic side view of a collar assembly of an offshore wind power pile foundation with a riprap collar protection structure according to the invention.
In the figure: 1. a pile foundation; 2. a riprap assembly; 3. a collar assembly.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1-4, the present invention provides an offshore wind power pile foundation with a protective structure, comprising: pile foundation 1, riprap subassembly 2, collar subassembly 3. In the present invention, a circular area is first dug around the pile foundation to embed the collar assembly 3 into the seabed. After excavation is finished, the shaft collar is assembled around the pile foundation seabed surface in an excavation range (full-size field installation), and the shaft collar component 3 is fixedly connected with the pile foundation 1. As shown in FIG. 4, the collar assembly is designed to have a symmetrical shape and can be installed facing any direction to accommodate the multi-directional flow of the wash-out. At the same time it must be ensured that the top surface of the collar is level with the surrounding seabed and that the collar can then be filled with excavated undisturbed soil to ensure a seamless transition to the seabed. In addition, as a precaution, the collar sides are inclined outwardly. This is done to help reduce the occurrence of flushing around the collar. The description of fig. 2 and 4 regarding the dimensions of the riprap assembly and the collar assembly are designed based on the corresponding offshore wind power pile foundation diameter D. The riprap component 2 of the invention surrounds the pile foundation 1 within the range of 1.5 times of the pile diameter, is distributed in a trapezoidal shape, has the thickness of 0.5 times of the pile diameter, and is filled in the groove of the collar component 3. The vortex that trapezoidal distribution's riprap subassembly protection caused drops is the most important rivers characteristic, and the deposit in pile foundation 1 and riprap protection subassembly 2 low reaches department is carried the upper reaches and riprap protection subassembly top, reaches the pile bottom, and the part is moved to the low reaches, forms two counter-rotating eddies, has reduced to a certain extent and has erodeed harm, has played the guard action to pile foundation 1.
The use process of the offshore wind power pile foundation with the protective structure comprises the following steps:
firstly, a circular area is excavated around a pile foundation 1, the diameter of the circular area is 4 times of the pile diameter, the depth of the circular area is 0.5 times of the pile diameter, then a shaft collar component 3 is assembled around a pile foundation seabed surface in an excavation range (full-size field installation), the shaft collar component 3 is designed to be in a symmetrical shape and can be installed facing any direction and adapt to the scouring of multi-directional flow, the rest pile foundations 1 of the shaft collar component 3 are fixedly connected, then seamless transition is carried out between the undisturbed soil 1 filled around the shaft collar component 3 and the seabed surface, and the top surface of the shaft collar is flush with the surrounding seabed. The riprap component 2 surrounds the pile foundation within the range of 1.5 times of the pile diameter, is distributed in a trapezoidal shape, has the thickness of 0.5 times of the pile diameter, and is filled in the groove of the shaft collar component 3, so that the direct impact of seawater on the pile foundation 1 is reduced. The offshore wind power pile foundation with the protection structure greatly prolongs the service life.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an offshore wind power pile foundation with stone throwing collar protective structure which characterized in that includes: pile foundation (1), riprap subassembly (2), axle collar subassembly (3) and pile foundation (1) fixed connection set up on the lateral wall of marine wind power steel-pipe pile (1) and below the sea bed surface, riprap subassembly (2) distribute more than the sea bed surface along pile foundation (1) circumference, riprap subassembly (2) are filled on axle collar (3) recess.
2. Offshore wind power pile foundation with riprap collar protection according to claim 1, characterised in that the riprap assembly (2) is a ladder-shaped arrangement of stones.
3. Offshore wind power pile foundation with a riprap collar protection structure according to claim 1, characterised in that the riprap components (2) are distributed above the sea bed surface over a certain range centered on the pile foundation (1).
4. Offshore wind power pile foundation with riprap collar protection structure according to claim 1, characterised in that the angle of the riprap assembly (2) to the sea bed surface is 60 °.
5. Offshore wind power pile foundation with riprap collar protection structure according to claim 1, characterised in that the riprap assembly (2) is filled within 1.5 times the pile diameter around the pile foundation (1).
6. Offshore wind power pile foundation with riprap collar protection structure according to claim 1, characterised in that the riprap assembly (2) covers 0.5 times the pile diameter height above the sea bed surface.
7. Offshore wind power pile foundation with riprap collar protection according to claim 1, characterised in that the collar assembly (3) is embedded below the surface of the sea bed around the pile foundation (1).
8. Offshore wind power pile foundation with riprap collar protection structure according to claim 1, characterised in that the collar assembly (3) top surface is level with the surrounding seabed.
9. Offshore wind power pile foundation with stone throwing collar protection structure according to claim 1, characterised in that the stone throwing assembly (2) is filled in the collar assembly (3) groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210425572.9A CN114991221A (en) | 2022-04-22 | 2022-04-22 | Novel stone throwing shaft collar protective structure's offshore wind power pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210425572.9A CN114991221A (en) | 2022-04-22 | 2022-04-22 | Novel stone throwing shaft collar protective structure's offshore wind power pile foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114991221A true CN114991221A (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210425572.9A Pending CN114991221A (en) | 2022-04-22 | 2022-04-22 | Novel stone throwing shaft collar protective structure's offshore wind power pile foundation |
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| Country | Link |
|---|---|
| CN (1) | CN114991221A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205980A (en) * | 2013-04-24 | 2013-07-17 | 中国水电顾问集团华东勘测设计研究院 | Large-diameter mono-pile foundation of offshore wind turbine and construction method of large-diameter mono-pile foundation |
| CN206599803U (en) * | 2017-03-27 | 2017-10-31 | 北京科技大学 | A kind of device for suppressing marine structure pile foundation seafloor scour |
| CN110984214A (en) * | 2019-12-19 | 2020-04-10 | 中国长江三峡集团有限公司 | Offshore wind power single pile-wing plate-rockfill composite foundation and construction method thereof |
| CN210857255U (en) * | 2019-07-15 | 2020-06-26 | 河北工业大学 | Reinforced composite single-pile foundation for offshore wind turbine generator system |
| CN111636404A (en) * | 2020-06-05 | 2020-09-08 | 中交第三航务工程局有限公司 | Construction method of offshore wind power compacted sand pile foundation bed |
| CN112343092A (en) * | 2020-11-24 | 2021-02-09 | 华能灌云清洁能源发电有限责任公司 | Underwater pile foundation scouring protection device with scouring prevention hole |
| CN212612601U (en) * | 2020-08-27 | 2021-02-26 | 中交第三航务工程局有限公司 | Pile box barrel composite foundation for offshore wind power |
| CN112627225A (en) * | 2020-12-25 | 2021-04-09 | 中国长江三峡集团有限公司 | Composite foundation structure of offshore wind power single pile, supporting disc and small suction bucket and construction method thereof |
| CN113266034A (en) * | 2021-06-25 | 2021-08-17 | 盛东如东海上风力发电有限责任公司 | Scouring protection reinforcing structure and method for offshore wind power single-pile foundation |
| WO2022037707A1 (en) * | 2021-03-08 | 2022-02-24 | 中国长江三峡集团有限公司 | Monopile foundation using cemented vibroflotation pile to reinforce soft soil foundation for use in offshore wind power generation, and construction method |
| CN114197512A (en) * | 2021-12-01 | 2022-03-18 | 中国长江三峡集团有限公司 | Offshore wind power composite double-pile foundation suitable for shallow covering soil layer and construction method thereof |
-
2022
- 2022-04-22 CN CN202210425572.9A patent/CN114991221A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205980A (en) * | 2013-04-24 | 2013-07-17 | 中国水电顾问集团华东勘测设计研究院 | Large-diameter mono-pile foundation of offshore wind turbine and construction method of large-diameter mono-pile foundation |
| CN206599803U (en) * | 2017-03-27 | 2017-10-31 | 北京科技大学 | A kind of device for suppressing marine structure pile foundation seafloor scour |
| CN210857255U (en) * | 2019-07-15 | 2020-06-26 | 河北工业大学 | Reinforced composite single-pile foundation for offshore wind turbine generator system |
| CN110984214A (en) * | 2019-12-19 | 2020-04-10 | 中国长江三峡集团有限公司 | Offshore wind power single pile-wing plate-rockfill composite foundation and construction method thereof |
| CN111636404A (en) * | 2020-06-05 | 2020-09-08 | 中交第三航务工程局有限公司 | Construction method of offshore wind power compacted sand pile foundation bed |
| CN212612601U (en) * | 2020-08-27 | 2021-02-26 | 中交第三航务工程局有限公司 | Pile box barrel composite foundation for offshore wind power |
| CN112343092A (en) * | 2020-11-24 | 2021-02-09 | 华能灌云清洁能源发电有限责任公司 | Underwater pile foundation scouring protection device with scouring prevention hole |
| CN112627225A (en) * | 2020-12-25 | 2021-04-09 | 中国长江三峡集团有限公司 | Composite foundation structure of offshore wind power single pile, supporting disc and small suction bucket and construction method thereof |
| WO2022037707A1 (en) * | 2021-03-08 | 2022-02-24 | 中国长江三峡集团有限公司 | Monopile foundation using cemented vibroflotation pile to reinforce soft soil foundation for use in offshore wind power generation, and construction method |
| CN113266034A (en) * | 2021-06-25 | 2021-08-17 | 盛东如东海上风力发电有限责任公司 | Scouring protection reinforcing structure and method for offshore wind power single-pile foundation |
| CN114197512A (en) * | 2021-12-01 | 2022-03-18 | 中国长江三峡集团有限公司 | Offshore wind power composite double-pile foundation suitable for shallow covering soil layer and construction method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20220902 |