CN112127385A - Self-supporting polygonal cylindrical foundation for offshore wind power - Google Patents
Self-supporting polygonal cylindrical foundation for offshore wind power Download PDFInfo
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- CN112127385A CN112127385A CN202011066466.3A CN202011066466A CN112127385A CN 112127385 A CN112127385 A CN 112127385A CN 202011066466 A CN202011066466 A CN 202011066466A CN 112127385 A CN112127385 A CN 112127385A
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- polygonal
- bottom plate
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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
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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
-
- 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
- E02D27/44—Foundations for machines, engines or ordnance
-
- 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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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a self-supporting polygonal cylindrical foundation for offshore wind power, which comprises a transition section and a polygonal cylinder arranged at the lower end of the transition section, wherein the upper end of the transition section is butted with a tower cylinder; the lower end of the transition section is connected with the polygonal bottom plate through a bottom plate beam system. The invention solves the defects that the traditional cylinder type foundation steel cylinder wall is easy to bend, the bottom plate span is too large, the formwork can not be supported, the bed jig needs to be arranged, the stability during floating transportation is not good, and the like, is suitable for the marine geological condition with a thick soft clay layer, has the advantages of large bearing area, negative pressure sinking, one-step installation, good stability in place and the like, has the advantages of no bending of the cylinder wall, convenient formwork support by reducing the bottom plate span, low gravity center of the foundation floating transportation, good stability, low cost of the bed jig, convenient template manufacture, high repeated utilization rate and the like, improves the stability of foundation sinking construction, and can reduce the comprehensive cost by 10 to 25 percent compared with the conventional composite cylinder type foundation.
Description
Technical Field
The invention relates to an offshore wind power foundation structure, in particular to an offshore wind power self-supporting polygonal cylindrical foundation.
Background
Based on the condition that the offshore area in China is mostly soft foundation such as silt, silty clay and the like, the requirements of foundation bearing capacity and foundation deformation are generally met, the traditional pile foundation such as a single-pile foundation and a jacket foundation is usually adopted, the two foundation forms need large-scale hoisting ships and piling ships for auxiliary construction, and the piles penetrate through a soft soil layer to enter a better bearing layer through hammering piling, so that the traditional pile type foundation is higher in manufacturing cost and long in construction period.
With the increase of the capacity of a single machine of an offshore wind turbine, the size and the material consumption of a foundation are required to be increased by adopting a traditional single pile and jacket foundation, and the problem that large-diameter single pile driving is limited by construction equipment to be difficult to exceed is solved. However, the cylindrical foundation still has the following disadvantages: (1) the lower barrel body is made of a thin-wall steel plate, and a jig frame is required to be arranged in the barrel to avoid buckling of the barrel wall when the transition section is manufactured on the lower barrel body, so that the construction cost of the foundation is increased; (2) the thin-wall steel cylinder structure is easy to buckle during transportation and negative pressure sinking, and the sinking risk is large; (3) the load transmission mode of the transition section and the bottom plate is complex, and the lower part structure of the cylinder foundation cannot be fully utilized for bearing.
The suction tube foundation solves the problem that the connection node of the tube wall of the original polygonal tube foundation and an outer bin plate is highly stressed and easily damaged, the outer bin plate reaches the minimum length, the steel consumption is reduced, the rigidity of the outer bin plate is increased, and the problem that the outer bin plate is easily bent when being inflated and sunk is solved. And does not need to set up the bed-jig, saved installation, transportation, construction and bed-jig hoist and mount expense of sinking, not only have the bearing area big concurrently, but also the negative pressure sinks, the installation is convenient and fast and stability advantage such as being good when on the spot traditional tube foundation, and it can also be built with the seat not to set up the bed-jig alone to have unique, the structural on-site intensity and stability are good, the compressive property of concrete and the tensile property of steel can be fully exerted under the on-site state, the wall of a section of thick bamboo and outer storehouse board connected node atress is little, outer storehouse board length reduces in a large number, advantages such as barrel buckling can not be buckled when sinking, be of value to reduce the basis size, further reduce the basis cost, be applicable to soft foundations such as silt.
Disclosure of Invention
In order to solve the problems, the invention provides a self-supporting polygonal cylindrical foundation for offshore wind power, which adopts a one-step integral installation process, has good economy and is suitable for soft foundations such as silt, mucky soil, silt soil and the like.
The technical scheme adopted by the invention is as follows: the utility model provides an offshore wind power self-supporting polygon cylinder type basis which characterized in that: the tower comprises a transition section, a polygonal bottom plate, a bottom plate beam system and a polygonal cylinder, wherein the transition section is of an internal cavity structure, the upper end of the transition section is in butt joint with a tower cylinder, and the lower end of the transition section is provided with the polygonal cylinder; a polygonal bottom plate and a bottom plate beam system are arranged between the transition section and the polygonal cylinder;
the polygonal barrel and the polygonal bottom plate are enclosed to form a barrel-shaped cavity with a closed upper end and an open lower end, the polygonal barrel comprises an outer barrel wall, an outer bin plate and an inner bin plate, the outer bin plate and the inner bin plate are arranged in the barrel-shaped cavity, the barrel-shaped cavity is divided into a plurality of sub-bin cavities along the axis, and the outer bin plate and the inner bin plate are connected through a circular bearing steel column; the outer barrel wall and the inner bin plate are the same in shape, the cross section of each outer barrel wall is polygonal, the corresponding surfaces of the outer barrel wall and the inner bin plate are parallel, and the outer bin plate is arranged between the lateral edge of the outer barrel wall and the lateral edge corresponding to the inner bin plate.
Preferably, the outer cylinder wall encloses a concrete structure with a regular polygon section, the inner side and the outer side of the outer cylinder wall are respectively covered with a layer of steel plate, the thickness of the concrete is 100-500 mm, the thickness of the steel plate is 3-20 mm, the number of sides is 4-12, and the side length is 10-30 m.
Further, the polygonal bottom plate is arranged at the upper end of the polygonal cylinder and is of a concrete structure with a steel-clad bottom surface; the shape and the size of the outer edge of the polygonal bottom plate are consistent with those of the outer cylinder wall of the polygonal cylinder.
Preferably, the thickness of the outer bin plate and the thickness of the inner bin plate are 100-500 mm, the diameter of the bearing steel column is 100-800 mm, the wall thickness is 5-80 mm, the top of the bearing steel column is connected with the polygonal bottom plate, and reinforced concrete, a reinforcing mesh or plain concrete are filled in the bearing steel column to improve the compression resistance and the stability of the structure. The bearing steel column can improve the air tightness of the structure in the process of floating transportation and sinking installation of the foundation, improve the stability of transportation and installation links, fully exert the compression resistance of concrete and the tensile resistance of steel in an in-place state, and have good in-place strength and stability.
Preferably, a bottom plate beam system is arranged on the polygonal bottom plate and comprises an outer edge ring beam, an inner ring beam, a main beam and a secondary beam, wherein the inner ring beam is circular and is connected with the bottom of the transition section; the main beams are intersected at the center of the polygonal bottom plate, connecting pieces are arranged at the intersections of the main beams, and secondary beams are uniformly arranged between the adjacent main beams in a radially-encrypted manner; the secondary beam is connected between the outer edge ring beam and the inner ring beam, and the extension lines of the secondary beam and the inner ring beam are intersected at the center of the polygonal bottom plate.
Preferably, the heights of the outer edge ring beam, the inner ring beam, the main beam, the secondary beam and the connecting piece are the same and are all 0.2-3.0 m; the width of the outer edge ring beam, the width of the inner ring beam and the width of the main beam are 0.2-3.0 m, and the diameter of the connecting piece is 2-10 m.
Furthermore, the projection of the inner bin plate on the horizontal plane needs to be inscribed on the projection of the inner ring beam on the horizontal plane.
Preferably, the transition section wall thickness is not less than 0.5 m.
The beneficial effects obtained by the invention are as follows: the invention solves the defects that the traditional cylinder foundation steel cylinder wall is easy to bend, the bottom plate span is too large, the formwork can not be supported, the jig frame needs to be arranged, the stability during floating transportation is not good, and the like, is suitable for the marine geological condition with a thick soft clay layer, has the advantages of large bearing area, negative pressure sinking, one-step installation, good stability in situ and the like of the traditional cylinder foundation, has the advantages of no bending of the cylinder wall, convenient formwork support by reducing the bottom plate span, low gravity center of foundation floating transportation, good stability, low cost of the jig frame, convenient template manufacture, high repeated utilization rate and the like, improves the stability of foundation sinking construction, can reduce the comprehensive cost by 10-25 percent compared with the conventional composite cylinder foundation in the same field, and is suitable for most offshore areas with soft covering layers in China.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of a polygonal base plate and base plate beam system;
FIG. 3 is a top view of a polygonal cartridge;
FIG. 4 is a top view of a load bearing steel column;
FIG. 5 is a schematic structural view of the outer cartridge wall;
FIG. 6 is a schematic view of the relative positions of the inner deck plate and the inner ring beam in a plane;
reference numerals: 1. a transition section; 2. a polygonal base plate; 3. a floor beam system; 31. an outer edge ring beam; 32. an inner ring beam; 33. a main beam; 34. a secondary beam; 35. a connecting member; 4. a polygonal cylinder; 41. an outer cylinder wall; 411. the wall of the outer cylinder is coated with steel; 412. concrete for the outer cylinder wall; 413. riveting; 42. an outer deck; 43. an inner deck plate; 44. a load bearing steel column; 45. and filling concrete.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
As shown in fig. 1 to 6, the self-supporting polygonal cylindrical foundation for offshore wind power of the present invention comprises a transition section 1, a bottom-clad steel concrete polygonal bottom plate 2, a bottom plate beam system 3 and a polygonal cylinder 4, wherein: the transition section 1 is of an internal cavity structure, the wall thickness can be freely selected and is not smaller than 0.5m, reinforcing steel bars are arranged in concrete to enhance the tensile strength of the concrete, and the diameter of an opening at the upper part can be adjusted according to the diameter of the tower barrel, so that the transition section 1 can be in butt joint with the tower barrel; the lower end of the transition section 1 is provided with a polygonal cylinder 4, and a polygonal bottom plate 2 and a bottom plate beam system 3 are arranged between the transition section 1 and the polygonal cylinder 4.
Referring to fig. 3, in this embodiment, the polygonal tubular structure includes a steel-clad concrete outer tubular wall 41, an outer panel 42 (steel outer panel) and an inner panel 43 (steel inner panel), the polygonal tube 4 and the polygonal bottom plate 2 enclose a tubular cavity with a closed upper end and an open lower end, the outer panel 42 and the inner panel 43 are disposed in the tubular cavity, the tubular cavity is divided into a plurality of sub-cavities along an axis, and the outer panel 42 and the inner panel 43 are connected by a circular bearing steel column 44. The outer cylinder wall 41 encloses a regular hexagon (the section of the outer cylinder wall is formed into a regular hexagon) structure, the side length is 18.5m, and the distance between opposite sides of the regular hexagon is 32.0 m; the inner chamber plates 43 are parallel to the outer chamber wall 41 (the corresponding surfaces are parallel), and also form a regular hexagon (the cross section is formed into a regular hexagon) structure, six outer chamber plates 42 are arranged between the inner chamber plates 43 and the outer chamber wall 41, and six outer chamber plates 42 are arranged between six side edges of the outer chamber wall 41 and six side edges corresponding to the inner chamber plates 43. The height of the polygonal cylinder 4 is 16.0m, the thicknesses of the inner surface and the outer surface of the steel-clad outer cylinder wall 411 are both 10mm, the thickness of concrete of the outer cylinder wall is 300mm, and the thicknesses of the outer bin plate 42 and the inner bin plate 43 are 200 mm; the outer bin plate 42 and the inner bin plate 43 are connected through a circular bearing steel column 44 with the diameter of 400mm, the wall thickness of the bearing steel column 44 can be freely selected and is not suitable to be smaller than 15mm, and reinforced concrete, a steel bar mesh or plain concrete can be filled inside the bearing steel column 44 and is determined according to engineering conditions. Fig. 4 shows the case of the filled concrete 45.
Referring to fig. 5, the polygonal bottom plate 2 is disposed on the polygonal cylinder 4, and its outer edge is a regular hexagon with the same shape and size as the outer cylinder wall, wherein the bottom plate concrete thickness is 0.5m, and the bottom plate bottom surface is coated with steel 22 with a thickness of 10 mm. A bottom plate beam system is arranged on the polygonal bottom plate 2 and consists of an outer edge ring beam 31, an inner ring beam 32, a main beam 33, a secondary beam 34 and connecting pieces; wherein, the inner ring beam 32 is circular and is connected with the bottom of the upper transition section 1; 3 main beams 33 are intersected at the center of the polygonal bottom plate 2, and connecting pieces are arranged at the intersections of the main beams 33; 2 secondary beams 34 are uniformly arranged between the adjacent main beams in a radially-encrypted manner, the secondary beams are connected with the outer edge ring beam and the inner ring beam, and the extension lines of the secondary beams are intersected at the center of the polygonal bottom plate 2; the heights of the outer edge ring beam 31, the inner ring beam 32, the main beam 33, the secondary beam 34 and the connecting piece 35 are all 1.0m, the widths of the inner ring beam 32 and the main beam 33 are 1.0m, the width of the outer edge ring beam 31 is 0.2m, the width of the secondary beam 34 is 0.5m, and the diameter of the circular connecting piece 35 is 6.0 m.
The projection of the regular hexagon enclosed by the inner bin plates 43 of the polygonal cylinder 4 on the horizontal plane needs to be inscribed on the projection of the central line of the circular inner ring beam 32 on the polygonal bottom plate 2 on the horizontal plane.
The transition section 1 is of an internal cavity structure, the wall thickness is not less than 0.5m, reinforcing steel bars are arranged in concrete to enhance the tensile strength of the concrete, the upper part of the transition section is in butt joint with a tower, and the lower part of the transition section is connected with an inner ring beam 32 on the polygonal bottom plate 2.
The transition section 1, the polygonal bottom plate 2, the bottom plate beam system 3 and the polygonal cylinder 4 are all made of cast-in-place concrete, and the components are connected by adopting anchoring or embedded parts of reinforcing steel bars. As shown in fig. 5, the steel-clad outer cylinder wall 411 can be used as a permanent formwork for the concrete 412 of the outer cylinder wall, and the steel-clad outer cylinder wall 411 and the all-steel partition plates (the outer chamber plate 42 and the inner chamber plate 43) are connected by welding.
When the foundation is sunk and installed, the angle edge is aligned with the main wind direction, so that the bearing performance of the structure can be exerted to the maximum extent, the size of the foundation is reduced beneficially, and the economy is improved.
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 (5)
1. The utility model provides an offshore wind power self-supporting polygon cylinder type basis which characterized in that: comprises a transition section (1), a polygonal bottom plate (2), a bottom plate beam system (3) and a polygonal cylinder (4),
the transition section (1) is of an internal cavity structure, the upper end of the transition section is in butt joint with the tower barrel, and the lower end of the transition section is provided with a polygonal barrel (4); a polygonal bottom plate (2) and a bottom plate beam system (3) are arranged between the transition section (1) and the polygonal cylinder (4);
the polygonal barrel (4) and the polygonal bottom plate (2) are enclosed to form a barrel-shaped cavity with a closed upper end and an open lower end, the polygonal barrel (4) comprises an outer barrel wall (41), an outer bin plate (42) and an inner bin plate (43), the outer bin plate (42) and the inner bin plate (43) are arranged in the barrel-shaped cavity, the barrel-shaped cavity is divided into a plurality of sub-bin cavities along the axis, and the outer bin plate (42) and the inner bin plate (43) are connected through a circular bearing steel column (44); the outer cylinder wall (41) and the inner bin plate (43) are identical in shape, the cross section of the outer cylinder wall is polygonal, the corresponding surfaces of the outer cylinder wall (41) and the inner bin plate (43) are parallel, and the outer bin plate (42) is arranged between the lateral edge of the outer cylinder wall (41) and the lateral edge corresponding to the inner bin plate (43);
the outer cylinder wall (41) is enclosed to form a concrete structure with a regular polygon section, the inner side and the outer side of the outer cylinder wall (41) are respectively covered with a layer of steel plate, wherein the thickness of the concrete is 100-500 mm, the thickness of the steel plate is 3-20 mm, the number of sides is 4-12, and the side length is 10-30 m; the polygonal bottom plate (2) is arranged at the upper end of the polygonal cylinder (4) and is of a concrete structure with a steel-clad bottom surface; the shape and the size of the outer edge of the polygonal bottom plate (2) are consistent with those of the outer cylinder wall (41) of the polygonal cylinder (4);
a bottom plate beam system (3) is arranged on the polygonal bottom plate (2), the bottom plate beam system (3) comprises an outer edge ring beam (31), an inner ring beam (32), a main beam (33) and a secondary beam (34), and the inner ring beam (32) is circular and is connected with the bottom of the transition section (1); the main beams (33) are intersected at the center of the polygonal bottom plate (2), connecting pieces (35) are arranged at the intersections of the main beams (33), and secondary beams (34) are uniformly arranged between the adjacent main beams (33) in a radially encrypted manner; the secondary beam (34) is connected between the outer edge ring beam (31) and the inner ring beam (32), and the extension line of the secondary beam is intersected at the center of the polygonal bottom plate (2).
2. An offshore wind power self-standing polygonal tubular foundation as claimed in claim 1, wherein: the thickness of the outer bin plate (42) and the thickness of the inner bin plate (43) are 100-500 mm, the diameter of the bearing steel column (44) is 100-800 mm, the wall thickness is 5-80 mm, the top of the bearing steel column (44) is connected with the polygonal bottom plate (2), and reinforced concrete, a steel bar mesh or plain concrete are filled in the bearing steel column (44).
3. An offshore wind power self-standing polygonal tubular foundation as claimed in claim 1, wherein: the outer edge ring beam (31), the inner ring beam (32), the main beam (33), the secondary beam (34) and the connecting piece (35) are the same in height and are all 0.2-3.0 m; the width of the outer edge ring beam (31), the width of the inner ring beam (32) and the width of the main beam (33) are 0.2-3.0 m, and the diameter of the connecting piece (35) is 2-10 m.
4. An offshore wind power self-standing polygonal tubular foundation as claimed in claim 1, wherein: the projection of the inner bin plate (43) on the horizontal plane needs to be inscribed on the projection of the inner ring beam (32) on the horizontal plane.
5. An offshore wind power self-standing polygonal tubular foundation as claimed in claim 1, wherein: the wall thickness of the transition section (1) is not less than 0.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011066466.3A CN112127385A (en) | 2020-09-30 | 2020-09-30 | Self-supporting polygonal cylindrical foundation for offshore wind power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011066466.3A CN112127385A (en) | 2020-09-30 | 2020-09-30 | Self-supporting polygonal cylindrical foundation for offshore wind power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112127385A true CN112127385A (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011066466.3A Withdrawn CN112127385A (en) | 2020-09-30 | 2020-09-30 | Self-supporting polygonal cylindrical foundation for offshore wind power |
Country Status (1)
| Country | Link |
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| CN (1) | CN112127385A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914357A (en) * | 2021-10-26 | 2022-01-11 | 长江勘测规划设计研究有限责任公司 | Offshore wind power truss concrete cylindrical foundation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049525A (en) * | 2016-07-27 | 2016-10-26 | 天津大学 | Polygonal offshore wind power barrel-shaped foundation |
| CN110016930A (en) * | 2018-12-14 | 2019-07-16 | 上海勘测设计研究院有限公司 | Offshore wind turbine single pile-suction tube combination foundation and its construction method |
| CN209397619U (en) * | 2018-09-27 | 2019-09-17 | 天津大学 | A kind of built-in more offshore wind power foundations |
-
2020
- 2020-09-30 CN CN202011066466.3A patent/CN112127385A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049525A (en) * | 2016-07-27 | 2016-10-26 | 天津大学 | Polygonal offshore wind power barrel-shaped foundation |
| CN209397619U (en) * | 2018-09-27 | 2019-09-17 | 天津大学 | A kind of built-in more offshore wind power foundations |
| CN110016930A (en) * | 2018-12-14 | 2019-07-16 | 上海勘测设计研究院有限公司 | Offshore wind turbine single pile-suction tube combination foundation and its construction method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914357A (en) * | 2021-10-26 | 2022-01-11 | 长江勘测规划设计研究有限责任公司 | Offshore wind power truss concrete cylindrical foundation |
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Application publication date: 20201225 |
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