CN109578219B - Offshore wind power cylindrical foundation capable of adjusting wind turbine bending moment load distribution - Google Patents
Offshore wind power cylindrical foundation capable of adjusting wind turbine bending moment load distribution Download PDFInfo
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- CN109578219B CN109578219B CN201811558918.2A CN201811558918A CN109578219B CN 109578219 B CN109578219 B CN 109578219B CN 201811558918 A CN201811558918 A CN 201811558918A CN 109578219 B CN109578219 B CN 109578219B
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- steel
- steel pipe
- top cover
- reinforced concrete
- bending moment
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- 238000005452 bending Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 86
- 239000010959 steel Substances 0.000 claims abstract description 86
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 27
- 238000004873 anchoring Methods 0.000 claims abstract description 20
- 230000007704 transition Effects 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims 1
- 238000011161 development Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/22—Foundations specially adapted for wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses an offshore wind torch type foundation capable of adjusting wind turbine bending moment load distribution, which comprises a lower cylindrical structure foundation and an upper transition section structure; the cylinder-type structural foundation is a cylindrical semi-sealing structure with an opening at the lower part, which consists of a steel cylinder and a reinforced concrete top cover; the transition section structure consists of a prestress inhaul cable, an anchoring piece, a steel support arm, a steel sleeve, a steel pipe column and an embedded part; the steel pipe column is positioned in the center of the reinforced concrete top cover, the top is used for installing a fan, and the bottom is buried in the top cover for firm connection; the upper part of the steel pipe upright post is provided with a steel sleeve; 3-9 steel support arms are radially and uniformly arranged in the middle of the steel sleeve; the tail end of the steel support arm is provided with an anchoring piece, and an embedded part is arranged in the reinforced concrete top cover right below the anchoring piece; a prestress inhaul cable is connected between the embedded part and the anchoring part; and the bending moment load distribution of the fan between the steel pipe column and the prestressed cable is realized by adjusting the tension value of the prestressed cable, so that the stress of the connection part of the steel pipe column and the reinforced concrete top cover is reduced.
Description
Technical Field
The invention relates to the field of offshore wind power generation type foundations, in particular to an offshore wind power cylinder type foundation capable of adjusting wind turbine bending moment load distribution.
Background
Wind energy is used as a novel renewable clean energy source and can be well used as a substitute for the traditional high-pollution high-energy consumption power supply resource. The wind power generation is mainly divided into land power generation and sea power generation. The land wind farm generally needs to occupy land resources, and meanwhile, the land wind farm has obvious limitations because of enough strong wind power and enough amount of wind power. In face of the limitations of onshore wind power, as early as seventies of the last century, the european major wind farm country has proposed the idea of building a wind farm offshore and developing offshore wind power. Compared with land wind power, the offshore wind speed is higher than land wind speed, so that the fan can generate more power, land resources are not occupied, and the potential of development of the offshore wind power is higher. Offshore wind power development is the wind power development direction in coastal countries and regions, is a high point and a pushing hand for the progress of wind power technology, and also faces a plurality of challenges.
In the construction of an offshore wind farm, the cost of a foundation structure accounts for a higher proportion of the total manufacturing cost, and different foundation structure types are selected according to the hydrology, geological conditions and use requirements of different fields of the offshore wind farm, so that the foundation structure type is a key for guaranteeing the foundation stability, reliability and economy of the offshore wind turbine. The research on the aspect of basic structures becomes a research key point and a difficulty in the field of offshore wind power due to various structural types, complex environmental conditions and other factors. One of the restrictions of the current large-scale development of offshore wind power in China is the lack of a safe and economic offshore wind power foundation structure type which is suitable for the characteristics of marine geological environment in China.
The basic structure type of the offshore wind turbine mainly comprises four types of pile type foundations, gravity type foundations, negative pressure cylinder type foundations and floating foundations according to the properties, configuration, installation methods, appearance and materials of the basic structure type of the offshore wind turbine. For negative pressure cylinder foundations, the form is an inverted open cylinder, which can be prefabricated from steel or reinforced concrete. The cylinder is connected with the steel cylinder through a shear plate with reinforcing ribs by a central upright post, and the shear plate distributes the load of the central upright post to the cylinder wall and transmits the load into the foundation. For the central upright post on the cylindrical foundation, a manner of inclined support or upper arc transition section is often adopted to bear bending moment generated by wind, wave and current. However, the defects are obvious, and for the arc transition section, the manufacturing process requirement is high and the reinforcement is complex; for the inclined support transition section, the stress at the joint of the inclined support transition section and the cylindrical foundation is large, and fatigue damage is easy to occur.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an offshore wind power cylindrical foundation capable of adjusting wind bending moment load distribution of a fan, which is suitable for a sea area with a seabed surface layer provided with a weak layer with the thickness of more than 10m and the water depth of 5-50 m.
The invention aims at realizing the following technical scheme:
a offshore wind power cylindrical foundation capable of adjusting wind turbine bending moment load distribution comprises an upper part and a lower part, wherein the lower part is a cylindrical structural foundation, and the upper part is a transition section structure; the cylinder-type structural foundation is a cylindrical semi-sealing structure with an opening at the lower part, which consists of a steel cylinder and a reinforced concrete top cover;
the transition section structure consists of a prestress inhaul cable, an anchoring piece, a steel support arm, a steel sleeve, a steel pipe column and an embedded part; the steel pipe column is positioned in the center of the reinforced concrete top cover, the top of the steel pipe column is used for being connected with the fan tower, and the bottom of the steel pipe column is embedded into the reinforced concrete top cover to be firmly connected; the upper part of the steel pipe upright post is provided with a steel sleeve which is sleeved on the steel pipe upright post and welded and connected into a whole; 3-9 steel support arms are arranged at the same height in the middle of the steel sleeve, the steel support arms are uniformly arranged in the radial direction, the steel support arms are of I-shaped steel sections, and the length of the steel support arms is not more than the edge of the outer ring of the reinforced concrete top cover; the tail end of the steel support arm is provided with an anchoring piece, and the anchoring piece is welded with the steel support arm; an embedded part is arranged right below the anchoring part in the reinforced concrete top cover; the anchoring piece at the tail end of the steel support arm is connected with an embedded part which is buried in the reinforced concrete top cover right below the steel support arm through a prestress inhaul cable; the ratio of bending moment loads of the fan is respectively born between the steel pipe stand column and the prestressed cable by adjusting the tension value of the prestressed cable, so that the stress of the connection part of the steel pipe stand column and the reinforced concrete top cover is reduced.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the cylindrical foundation consists of the lower circular cylindrical structural foundation and the upper transition section structure, and the fan bending moment load distribution between the steel pipe upright post and the prestressed cable is realized by adjusting the tension value of the prestressed cable, so that the stress of the connecting part of the steel pipe upright post and the reinforced concrete top cover is reduced, and the design difficulty is reduced. In addition, the whole foundation can be integrally prefabricated on land, has self-floating capacity, and the lower cylindrical structural foundation is quickly installed in a sinking mode through negative pressure during installation.
Drawings
FIG. 1 is a schematic perspective view of a cylindrical foundation for offshore wind power according to the present invention.
FIG. 2 is a schematic top view of the offshore wind turbine foundation of the present invention.
Reference numerals: 1. a steel cylinder; 2. a reinforced concrete top cover; 3. prestress inhaul cable; 4. an anchor; 5. a steel support arm; 6. a steel sleeve; 7. a steel pipe column; 8. built-in fitting
Detailed Description
The invention is described in further detail below with reference to the drawings and the specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment describes an offshore wind power cylindrical foundation capable of adjusting wind turbine bending moment load distribution, the foundation can be divided into an upper part and a lower part, the lower part is a cylindrical structural foundation, and the upper part is a transition section structure;
the cylindrical semi-sealing structure with the lower opening is formed by a steel cylinder 1 and a reinforced concrete top cover 2, the diameter of the steel cylinder is 30m, the wall thickness of the steel cylinder 1 is 25mm, the cylinder height is 12m, and the thickness of the reinforced concrete top cover is 60cm;
the transition section structure consists of a prestress inhaul cable 3, an anchoring piece 4, a steel support arm 5, a steel sleeve 6, a steel pipe column 7 and an embedded part 8; the steel pipe column 7 is positioned in the center of the reinforced concrete top cover, has the wall thickness of 70mm, the height of 35m and the diameter of 6.5m, is embedded into the reinforced concrete top cover 2 and is firmly connected; the upper part of the steel pipe column 7 is provided with a steel sleeve 6, the wall thickness is 40mm, the height is 2m, and the steel sleeve 6 is sleeved on the steel pipe column 7 and welded and connected into a whole; the middle part of the steel sleeve 6 is provided with 6 steel support arms 5 at the same height, the steel support arms 5 are radially and uniformly arranged, the steel support arms 5 are of an I-shaped steel section structure, the height is 1m, the wall thickness of a web plate is 30mm, the width of a flange plate is 0.5, the thickness is 40mm, and the length of the flange plate is not more than the edge of the outer ring of the reinforced concrete top cover 2; the outer side end of the steel support arm 5 is provided with an anchoring piece 4, and the anchoring piece 4 and the steel support arm 5 are welded together; an embedded part 8 is arranged in the reinforced concrete top cover 2 right below the anchoring part 4; 1 prestress inhaul cable 3 is connected between the embedded part 8 and the corresponding anchoring part 4 right above; the fan bending moment load distribution between the steel pipe upright post 7 and the prestressed cable 3 is realized by adjusting the tension value of the prestressed cable 3, so that the stress of the connection part of the steel pipe upright post 7 and the reinforced concrete top cover 2 is reduced.
The concrete construction method of the offshore wind power cylindrical foundation comprises the following steps:
(1) The entire base structure is first manufactured in a land-based factory.
(2) The structural foundation is towed to the designated installation site by floating.
(3) The circular negative pressure cylinder type structural foundation at the lower part is sunk into the seabed by drawing negative pressure to sink, so that the top cover of the circular negative pressure cylinder type structural foundation is tightly contacted with the seabed surface.
(4) And installing a prestress inhaul cable and tensioning.
(5) After the whole foundation structure is constructed, a fan is hoisted on the steel pipe upright post.
The invention is not limited to the embodiments described above. The above description of specific embodiments is intended to describe and illustrate the technical aspects of the present invention, and is intended to be illustrative only and not limiting. Numerous specific modifications can be made by those skilled in the art without departing from the spirit of the invention and scope of the claims, which are within the scope of the invention.
Claims (6)
1. The offshore wind power cylinder foundation capable of adjusting the bending moment load distribution of the fan is characterized by being divided into a cylinder structure foundation at the lower part and a transition section structure at the upper part, wherein the cylinder structure foundation is a cylinder semi-sealing structure with an opening at the lower part and composed of a steel cylinder and a reinforced concrete top cover;
the transition section structure consists of a prestress inhaul cable, an anchoring piece, a steel support arm, a steel sleeve, a steel pipe column and an embedded part; the steel pipe column is positioned in the center of the reinforced concrete top cover, the top of the steel pipe column is used for being connected with the fan tower, and the bottom of the steel pipe column is embedded into the reinforced concrete top cover for fixing; the steel sleeve is fixedly sleeved on the upper part of the steel pipe upright post; 3-9 steel support arms are radially and uniformly arranged in the middle of the steel sleeve; the tail end of the steel support arm is fixedly connected with the anchoring piece, and an embedded part is correspondingly arranged on the reinforced concrete top cover right below the anchoring piece; each anchoring piece is connected with an embedded part positioned right below the anchoring piece through a prestress inhaul cable; the fan bending moment load proportion born between the steel pipe stand column and the prestressed cable respectively is realized by adjusting the tension value of the prestressed cable, so that the stress of the connection part of the steel pipe stand column and the reinforced concrete top cover is reduced.
2. The offshore wind power cylinder foundation with adjustable fan bending moment load distribution according to claim 1, wherein the steel sleeve is sleeved on the steel pipe upright post and is connected into a whole in a welding mode.
3. The offshore wind power cylinder foundation with adjustable fan bending moment load distribution according to claim 1, wherein the steel support arm is of an I-shaped steel section structure, and the length of the steel support arm does not exceed the edge of the outer ring of the reinforced concrete top cover.
4. The offshore wind turbine foundation with adjustable fan bending moment load distribution according to claim 1, wherein the anchoring piece is welded and fixed with the steel support arm.
5. The offshore wind power cylinder foundation capable of adjusting wind turbine bending moment load distribution according to claim 1, wherein the diameter of the steel cylinder is 20-40m, and the wall thickness is 15-40mm.
6. The offshore wind power cylinder foundation capable of adjusting wind turbine bending moment load distribution according to claim 1, wherein the wall thickness of the steel pipe upright post is 50-120mm, and the diameter of the steel pipe upright post is 5-15m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811558918.2A CN109578219B (en) | 2018-12-19 | 2018-12-19 | Offshore wind power cylindrical foundation capable of adjusting wind turbine bending moment load distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811558918.2A CN109578219B (en) | 2018-12-19 | 2018-12-19 | Offshore wind power cylindrical foundation capable of adjusting wind turbine bending moment load distribution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109578219A CN109578219A (en) | 2019-04-05 |
| CN109578219B true CN109578219B (en) | 2023-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811558918.2A Active CN109578219B (en) | 2018-12-19 | 2018-12-19 | Offshore wind power cylindrical foundation capable of adjusting wind turbine bending moment load distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109578219B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798815A (en) * | 2010-01-29 | 2010-08-11 | 道达(上海)风电投资有限公司 | Marine wind turbine foundation for steel-concrete combined structure |
| CN106948362A (en) * | 2017-03-20 | 2017-07-14 | 天津大学 | A kind of compound cartridge type foundation immersion unstability drag-line sub-controlling unit and control method |
| CN108860495A (en) * | 2017-05-09 | 2018-11-23 | 上海绿色环保能源有限公司 | Applied to the floatation type blower between shallow water and deep water |
| CN209398542U (en) * | 2018-12-19 | 2019-09-17 | 天津大学 | A kind of offshore wind farm bucket foundation of adjustable blower moment load distribution |
-
2018
- 2018-12-19 CN CN201811558918.2A patent/CN109578219B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798815A (en) * | 2010-01-29 | 2010-08-11 | 道达(上海)风电投资有限公司 | Marine wind turbine foundation for steel-concrete combined structure |
| CN106948362A (en) * | 2017-03-20 | 2017-07-14 | 天津大学 | A kind of compound cartridge type foundation immersion unstability drag-line sub-controlling unit and control method |
| CN108860495A (en) * | 2017-05-09 | 2018-11-23 | 上海绿色环保能源有限公司 | Applied to the floatation type blower between shallow water and deep water |
| CN209398542U (en) * | 2018-12-19 | 2019-09-17 | 天津大学 | A kind of offshore wind farm bucket foundation of adjustable blower moment load distribution |
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| Publication number | Publication date |
|---|---|
| CN109578219A (en) | 2019-04-05 |
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