CN112900470A - Offshore wind turbine barrel type foundation underwater floating structure and method - Google Patents
Offshore wind turbine barrel type foundation underwater floating structure and method Download PDFInfo
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- CN112900470A CN112900470A CN202110077397.4A CN202110077397A CN112900470A CN 112900470 A CN112900470 A CN 112900470A CN 202110077397 A CN202110077397 A CN 202110077397A CN 112900470 A CN112900470 A CN 112900470A
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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
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Abstract
The invention relates to a floating structure built in water of a barrel-shaped foundation of an offshore wind turbine and a method thereof, wherein the floating structure built comprises a barrel-shaped foundation, a prefabricated platform and a sinking-bottom platform, the prefabricated platform is fixed in a harbor basin, a steel-clad concrete polygonal barrel is built on the prefabricated platform, the steel-clad concrete polygonal barrel is connected with a buoyancy tank, and the buoyancy tank is inflated or drained to separate the steel-clad concrete polygonal barrel from the prefabricated platform; and transferring the steel-clad concrete polygonal cylinder to a bottom sinking platform fixed on the mud surface, and performing subsequent pouring of the steel-clad concrete polygonal cylinder above the water surface and construction of a concrete bottom plate and a concrete transition section until the construction of the cylindrical foundation is completed. According to the invention, the cylindrical foundation construction site is placed in the harbor basin, so that the dependence on a large wharf is reduced, a large gantry crane is not needed in the construction process, and the cylindrical foundation construction site can be quickly, conveniently and economically towed and transported to a designated machine position for installation after construction. And the construction equipment can be used repeatedly, and the economy is better.
Description
Technical Field
The invention relates to the technical field of offshore wind power, in particular to a floating structure built in water of a cylindrical foundation of an offshore wind turbine and a method.
Background
Under the environment of global high concern on developing low-carbon economy, wind power generation has huge market potential as a renewable energy source. Offshore wind power has the characteristics of stability of sea wind resources, large power generation power, no restriction of land conditions and the like, and is rapidly developed all over the world in recent years. The difficulty and high cost of the foundation construction of the wind turbine are one of the maximum limiting conditions for the construction of offshore wind power plants.
Compared with other foundation forms such as single piles, jacket and the like, the offshore wind turbine barrel type foundation has a wide application prospect in soft foundations such as silt and silty clay. The cylindrical foundation has the advantages of integrated installation, short construction period and low construction cost; however, the construction of the cylindrical foundation requires a large installation dock area and a large gantry crane. After the foundation is built, special transport ships are needed for transporting to the appointed machine position. The main factors restricting the development of the cylindrical foundation at present are high requirement on the area of a wharf construction site and high requirement on special construction equipment.
Disclosure of Invention
In order to solve the problems, the invention provides a floating structure built in water on a cylindrical foundation of an offshore wind turbine and a method thereof, wherein a cylindrical foundation construction site is placed in a harbor basin, so that the dependence on a large wharf is reduced.
The technical scheme adopted by the invention is as follows: the utility model provides an offshore wind turbine shell type foundation aquatic is built and is floated structure, includes shell type basis, its characterized in that: the prefabricated platform is fixed in a harbor basin, the steel-clad concrete polygonal cylinder is built on the prefabricated platform, the steel-clad concrete polygonal cylinder is connected with a buoyancy tank, and the buoyancy tank is inflated or drained to separate the steel-clad concrete polygonal cylinder from the prefabricated platform; and transferring the steel-clad concrete polygonal cylinder to a bottom sinking platform fixed on the mud surface, and performing subsequent pouring of the steel-clad concrete polygonal cylinder above the water surface and construction of a concrete bottom plate and a concrete transition section until the construction of the cylindrical foundation is completed.
Preferably, each side of the steel-clad concrete polygonal cylinder is correspondingly provided with a buoyancy tank, the buoyancy tanks are fixedly connected with the steel-clad concrete polygonal cylinder wall through horizontal truss support rods, one end of each horizontal truss support rod is connected with the buoyancy tank through a connecting steel plate, and the other end of each horizontal truss support rod is connected with the steel-clad concrete polygonal cylinder wall through another connecting steel plate.
Preferably, the upper end of the buoyancy tank is provided with an air charging and discharging port, and the lower end of the buoyancy tank is provided with an air charging and discharging port.
A method for building a cylindrical foundation of an offshore wind turbine in water is characterized by comprising the following steps: the method comprises the following steps:
1) before the construction of the cylindrical foundation, the construction harbor basin is swept, and the area with uneven mud surface is leveled;
2) transporting the prefabricated platform to a construction harbor pool, positioning and anchoring, and floating on the sea surface;
3) the bottom-sinking platform is filled with water in advance and sinks under the water, and the bottom is seated on the leveled mud surface and kept horizontal;
4) building a cylinder wall steel template on the prefabricated platform in a layered mode, pouring concrete in the template to a set height of the cylinder wall, and then sealing a top cover to form a closed space of the steel-clad concrete polygonal cylinder 4;
5) welding a horizontal truss support rod and a buoyancy tank structure on the outer wall of the steel-clad concrete polygonal cylinder through a connecting steel plate;
6) under the condition of proper sea conditions, inflating and exhausting air to an air inflation and exhausting port at the top of the buoyancy tank or draining water to an air inflation and exhausting port at the bottom to enable the steel-clad concrete polygonal cylinder to float upwards and separate from the prefabricated platform; then, transferring the substrate to the upper part of the bottom sinking platform;
7) after the steel-clad concrete polygonal cylinder is hauled to the position above the sinking platform, the steel-clad concrete polygonal cylinder falls on the sinking platform and is stable; and (4) sequentially carrying out steel-clad concrete subsequent pouring and concrete transition section construction on the water surface until the construction of the cylindrical foundation is completed.
Preferably, in the step 2), the prefabricated platform is transported to a construction harbor pool in a wet-dragging mode, and positioning and anchoring stability of the prefabricated platform are realized by a sea anchor and an auxiliary device.
Preferably, in the step 6), after the steel-clad concrete polygonal cylinder is transferred to the bottom sinking platform, the prefabricated platform is inflated and drained, so that the prefabricated platform floats to the water surface, and preparation is made for manufacturing the next steel-clad concrete polygonal cylinder.
The beneficial effects obtained by the invention are as follows: the invention reduces the dependence on a large wharf by placing the cylindrical foundation construction site in the harbor basin. The foundation construction process does not need a large gantry crane, and the foundation can be quickly, conveniently and economically installed after being constructed and towed to a designated machine position. In addition, prefabricated platform, sinking the bottom platform, truss bracing piece and flotation tank all can recycle, and economic nature is better. The invention has the condition of operation implementation, the construction equipment can be repeatedly used, and the construction cost of the foundation is reduced through the integrated processes of construction, floating transportation and the like of the cylindrical foundation.
Drawings
FIG. 1 is a plan view of a truss support member and buoyancy tanks;
FIG. 2 is a schematic view of a cylindrical foundation and a prefabricated platform;
FIG. 3 is a schematic view of a cylindrical foundation and a bottom-sinking platform;
reference numerals: 1. mud surface; 2. prefabricating a platform; 3. a bottom sinking platform; 4. steel-clad concrete polygonal cylinders; 5. connecting steel plates; 6. a horizontal truss support member; 7. a buoyancy tank; 8. an air charging and discharging port; 9. filling and draining water ports; 10. a concrete floor; 11. and (5) a concrete transition section.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
As shown in fig. 1-3, the offshore wind turbine cylinder foundation underwater construction floating structure comprises a cylinder foundation, a prefabricated platform 2 and a sinking-bottom platform 3, wherein the cylinder foundation comprises a steel-clad concrete polygonal cylinder 4, a concrete bottom plate 10 and a concrete transition section 11, the prefabricated platform 2 is fixed in a harbor basin, the steel-clad concrete polygonal cylinder 4 is built on the prefabricated platform 2, a horizontal truss support rod 6 and a buoyancy tank 7 are welded on the outer wall of each side of the steel-clad concrete polygonal cylinder 4 through a connecting steel plate 5, and additional buoyancy is provided for the steel-clad concrete polygonal cylinder 4; the upper end of the buoyancy tank 7 is provided with an air charging and discharging port 8, the lower end of the buoyancy tank 7 is provided with an air charging and discharging port 9, the buoyancy tank 7 is charged with air through the air charging and discharging port 8, or the buoyancy tank 7 is discharged with water through the air charging and discharging port 9, so that the steel-clad concrete polygonal cylinder 4 is separated from the prefabricated platform 2; after the steel-clad concrete polygonal cylinder 4 is separated from the prefabricated platform 2, the steel-clad concrete polygonal cylinder 4 is transferred to the bottom sinking platform 3 fixed on the mud surface 1, and then the steel-clad concrete polygonal cylinder 4 is subsequently poured above the water surface, and the concrete bottom plate 10 and the concrete transition section 11 are constructed until the construction of the cylinder foundation is completed.
The invention relates to a method for building a cylindrical foundation of an offshore wind turbine in water, which comprises the following steps:
1) before the construction of the cylindrical foundation 4, the construction harbor basin is swept, the geological fluctuation and the water depth are known, if the mud surface 1 is obviously uneven, leveling treatment is needed, and the stability of the prefabricated platform 2 and the bottom sinking platform 3 is ensured;
2) the prefabricated platform 2 is transported to a construction harbor pool in a wet-dragging mode, is positioned and anchored stably by a sea anchor, an auxiliary device and the like, and floats on the sea surface;
3) the bottom sinking platform 3 can be filled with water in advance and sink into the water according to the construction arrangement requirements in the harbor basin, and the bottom is seated on the leveled mud surface 1 and kept horizontal as much as possible;
4) building a cylinder wall steel template on the prefabricated platform 2 in a layered mode, pouring concrete in the template to a set height of the cylinder wall, and then sealing a top cover to form a closed space of the steel-clad concrete polygonal cylinder 4; at the moment, the prefabricated platform 2 gradually sinks to the mud surface 1 along with the increase of the construction load;
5) a connecting steel plate 5 is welded on the outer wall of the steel-clad concrete polygonal cylinder 4, the connecting steel plate 5 is rigidly connected with the inner side of a horizontal truss support rod 6, the outer side of the horizontal truss support rod 6 is also rigidly connected with a buoyancy tank 7 through the connecting steel plate 5, and the height and the length of the truss support rod 6 can be adjusted according to the water depth and the size of a cylinder foundation;
6) after the steel-clad concrete polygonal cylinder 4 is capped, the concrete is solidified, and whether the air tightness is good or not is checked; under the condition of proper sea conditions, inflating and exhausting air to an inflating and exhausting port 8 at the top of the buoyancy tank 7 or draining water to an inflating and exhausting port 9 at the bottom to enable the steel-clad concrete polygonal cylinder 4 to float upwards for a certain height to be separated from the prefabricated platform 2; transferring the sludge to a nearby sinking platform 3 in a towing manner by using a towing wheel; after the steel-clad concrete polygonal cylinder 4 is transferred to the bottom sinking platform 3, the prefabricated platform 2 is inflated and drained, so that the prefabricated platform 2 floats to the water surface, and preparation is made for manufacturing the next steel-clad concrete polygonal cylinder 4;
7) after the steel-clad concrete polygonal cylinder 4 is hauled to the position above the sinking platform 3, the foundation falls on the sinking platform 3 through slow deflation, and the height of the foundation is exposed above the water surface of the harbor basin; and then, steel-clad concrete subsequent pouring and construction of the concrete bottom plate 10 and the concrete transition section 11 can be sequentially carried out above the water surface until the construction of the cylindrical foundation is completed.
The foregoing shows and describes the general principles and principal structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides an offshore wind turbine shell type foundation aquatic is built and is floated structure, includes shell type basis, its characterized in that: the prefabricated steel-clad concrete foundation comprises a steel-clad concrete polygonal cylinder (4), a concrete bottom plate (10) and a concrete transition section (11), the prefabricated platform (2) is fixed in a harbor basin, the steel-clad concrete polygonal cylinder (4) is built on the prefabricated platform (2), the steel-clad concrete polygonal cylinder (4) is connected with a buoyancy tank (7), and the buoyancy tank (7) is inflated or drained to separate the steel-clad concrete polygonal cylinder (4) from the prefabricated platform (2); transferring the steel-clad concrete polygonal cylinder (4) to a bottom sinking platform (3) fixed on a mud surface (1), and performing subsequent pouring of the steel-clad concrete polygonal cylinder (4) above the water surface and construction of a concrete bottom plate (10) and a concrete transition section (11) until the construction of a cylinder foundation is completed;
each side of the steel-clad concrete polygonal cylinder (4) is correspondingly provided with a floating box (7), the floating box (7) is fixedly connected with the cylinder wall of the steel-clad concrete polygonal cylinder (4) through a horizontal truss support rod piece (6), one end of the horizontal truss support rod piece (6) is connected with the floating box (7) through a connecting steel plate (5), and the other end of the horizontal truss support rod piece is connected with the cylinder wall of the steel-clad concrete polygonal cylinder (4) through another connecting steel plate (5); the upper end of the buoyancy tank (7) is provided with an air charging and discharging port (8), and the lower end is provided with an air charging and discharging port (9).
2. A method for building a cylindrical foundation of an offshore wind turbine in water is characterized by comprising the following steps: the method comprises the following steps:
1) before the construction of the cylindrical foundation, the construction harbor basin is swept, and the uneven area of the mud surface (1) is leveled;
2) the prefabricated platform (2) is transported to a construction harbor pool, positioned and anchored, and floats on the sea surface;
3) the bottom sinking platform (3) is filled with water in advance and sinks under water, and the bottom is seated on the leveled mud surface (1) and kept horizontal;
4) building a cylinder wall steel template on the prefabricated platform (2) in a layered mode, pouring concrete in the template to a set height of the cylinder wall, and then sealing a top cover to form a closed space of the steel-clad concrete polygonal cylinder (4);
5) welding a horizontal truss support rod piece (6) and a floating box (7) on the outer wall of the steel-clad concrete polygonal cylinder (4) through a connecting steel plate (5);
6) under the condition of proper sea conditions, inflating and discharging air to an air inflation and discharging port (8) at the top of the buoyancy tank (7) or discharging water to an air inflation and discharging port (9) at the bottom to enable the steel-clad concrete polygonal cylinder (4) to float upwards and separate from the prefabricated platform (2); then, transferring the steel-clad concrete polygonal cylinder (4) to the position above the sinking platform (3);
7) after the steel-clad concrete polygonal cylinder (4) is hauled to the position above the sinking platform (3), the steel-clad concrete polygonal cylinder falls on the sinking platform (3) and is stable; and (3) sequentially carrying out steel-clad concrete subsequent pouring and the construction of the concrete bottom plate (10) and the concrete transition section (11) above the water surface until the construction of the cylindrical foundation is completed.
3. The offshore wind turbine drum-type foundation underwater construction floating method according to claim 2, characterized in that: in the step 2), the prefabricated platform (2) is transported to a construction harbor pool in a wet-dragging mode, and positioning and anchoring stability of the prefabricated platform (2) are achieved through a sea anchor and an auxiliary device.
4. The offshore wind turbine drum-type foundation underwater construction floating method according to claim 2, characterized in that: and 6), after the steel-clad concrete polygonal cylinder (4) is transferred to the bottom sinking platform (3), inflating and draining the prefabricated platform (2) to enable the prefabricated platform (2) to float to the water surface, and preparing for manufacturing the next steel-clad concrete polygonal cylinder (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110077397.4A CN112900470A (en) | 2021-01-20 | 2021-01-20 | Offshore wind turbine barrel type foundation underwater floating structure and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110077397.4A CN112900470A (en) | 2021-01-20 | 2021-01-20 | Offshore wind turbine barrel type foundation underwater floating structure and method |
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| CN112900470A true CN112900470A (en) | 2021-06-04 |
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| CN202110077397.4A Pending CN112900470A (en) | 2021-01-20 | 2021-01-20 | Offshore wind turbine barrel type foundation underwater floating structure and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718741A (en) * | 2021-09-15 | 2021-11-30 | 天津大学 | Underwater buoyancy tank separation structure and separation method suitable for water prefabricated platform of hexagonal cylindrical foundation |
| WO2023082754A1 (en) * | 2021-11-10 | 2023-05-19 | 中国华能集团清洁能源技术研究院有限公司 | Customized design method for wind turbine |
| CN116335235A (en) * | 2022-12-05 | 2023-06-27 | 广东华电清远能源有限公司 | Construction method of prefabricated pump house |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158637A (en) * | 2019-06-12 | 2019-08-23 | 长江勘测规划设计研究有限责任公司 | Offshore wind farm bucket foundation constructing structure and construction method |
| CN111926850A (en) * | 2020-08-11 | 2020-11-13 | 天津大学 | Device and method for prefabricating hexagonal offshore wind power cylinder type foundation on water |
-
2021
- 2021-01-20 CN CN202110077397.4A patent/CN112900470A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158637A (en) * | 2019-06-12 | 2019-08-23 | 长江勘测规划设计研究有限责任公司 | Offshore wind farm bucket foundation constructing structure and construction method |
| CN111926850A (en) * | 2020-08-11 | 2020-11-13 | 天津大学 | Device and method for prefabricating hexagonal offshore wind power cylinder type foundation on water |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718741A (en) * | 2021-09-15 | 2021-11-30 | 天津大学 | Underwater buoyancy tank separation structure and separation method suitable for water prefabricated platform of hexagonal cylindrical foundation |
| CN113718741B (en) * | 2021-09-15 | 2022-12-16 | 天津大学 | Underwater buoyancy tank separation structure and separation method suitable for water prefabricated platform of hexagonal cylindrical foundation |
| WO2023082754A1 (en) * | 2021-11-10 | 2023-05-19 | 中国华能集团清洁能源技术研究院有限公司 | Customized design method for wind turbine |
| CN116335235A (en) * | 2022-12-05 | 2023-06-27 | 广东华电清远能源有限公司 | Construction method of prefabricated pump house |
| CN116335235B (en) * | 2022-12-05 | 2023-10-17 | 广东华电清远能源有限公司 | Construction method of prefabricated pump house |
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Application publication date: 20210604 |
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