CN213625674U - Offshore wind power polygonal cylinder foundation - Google Patents
Offshore wind power polygonal cylinder foundation Download PDFInfo
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- CN213625674U CN213625674U CN202022210662.5U CN202022210662U CN213625674U CN 213625674 U CN213625674 U CN 213625674U CN 202022210662 U CN202022210662 U CN 202022210662U CN 213625674 U CN213625674 U CN 213625674U
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- 230000007704 transition Effects 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 46
- 239000010959 steel Substances 0.000 claims description 46
- 239000004567 concrete Substances 0.000 claims description 27
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 6
- 238000007667 floating Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000004927 clay Substances 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000009415 formwork Methods 0.000 abstract 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The utility model relates to a polygonal cylindrical foundation for offshore wind power, which comprises a transition section, a polygonal bottom plate, a bottom plate beam system and a polygonal cylinder, 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 of the traditional cylindrical foundation, has the advantages of no buckling of the cylindrical wall and an outer bin plate, convenient formwork support for reducing the span of the bottom plate, low floating gravity center of the foundation, good stability, low cost of a jig frame, convenient manufacture of a template, high repeated utilization rate and the like, improves the stability of foundation sinking construction, can reduce the comprehensive cost by 10 to 25 percent compared with the conventional composite cylindrical foundation in the same field, has certain angle difference between the corresponding directions of the polygonal inner bin plate and the polygonal cylindrical wall, solves the problem that the connection node of the cylindrical wall and the outer bin plate of the original polygonal cylindrical foundation is greatly stressed and is easily, the length of the outer warehouse board is greatly reduced, and the problem that the outer warehouse board is easy to bend when inflated and sunk is reduced.
Description
Technical Field
The utility model relates to an offshore wind power foundation structure, concretely relates to offshore wind power polygon section of thick bamboo type basis.
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 barrel foundation solves the problem that the connection node of the barrel wall of the original polygonal barrel foundation and an outer bin plate is large in stress and easy to damage, 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 easy to buckle when 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.
SUMMERY OF THE UTILITY MODEL
For solving the above problem, the utility model provides an offshore wind power polygon cylinder type basis, this basis adopt one-step integral erection technology, and economic nature is good, is applicable to weak foundations such as silt, mucky soil and silt soil.
The utility model adopts the technical proposal that: the utility model provides an offshore wind power polygon section of thick bamboo 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 bin wall and the inner bin plate are both of polygonal structures, the outer bin plate is arranged between the outer bin wall and the inner bin plate, one end of the outer bin plate is connected with the middle point of the corresponding edge of the outer bin wall, and the other end of the outer bin plate is connected with the top point of the polygonal inner bin plate. The corresponding directions of the inner bin plate and the outer bin wall are different by a certain angle instead of being simply parallel, so that the problem that the connection node of the bin wall and the outer bin plate of the original polygonal bin type foundation is damaged easily due to stress is solved, 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 easy to bend when being inflated and sunk is solved.
The bearing steel column is connected with the polygonal bottom plate, and reinforced concrete, steel bar meshes or plain concrete can be filled in the bearing steel column so as to improve the compression resistance and 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, the outer cylinder wall is of a regular polygonal concrete structure, the inner side and the outer side of the outer cylinder wall are respectively provided 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 inner bin plates surround to form a regular polygon structure, and a connecting line of the centers of the inner bin plates of the regular polygon structure and the circle center of the bearing steel column is perpendicular to the outer cylinder wall.
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 is filled in the bearing steel column. The inner and outer bin dividing plates are formed by splicing 100-500 mm thick steel plates, and the joints of the inner and outer bin dividing plates and the steel-clad bearing steel columns are welded together in a groove mode by submerged arc welding. The bearing steel column is connected with the polygonal bottom plate by adopting the anchoring or embedded part of the steel bar. The outer cylinder wall is used for enhancing the shearing resistance of a steel-concrete interface, and the steel-coated outer cylinder wall and the all-steel bin distribution plate are connected in a welding mode. The steel-clad outer cylinder wall can be used as a permanent template of the concrete of the outer cylinder wall, rivets can be arranged on the steel-clad to enhance the shearing resistance of a steel-concrete interface, and the steel-clad outer cylinder wall, the all-steel bin plates and the steel-clad bottom plate are connected by welding.
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 regular polygon enclosed by the inner bin plates 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.
Preferably, the transition section and the bottom plate beam system are connected by adopting anchoring or embedded parts of steel bars. Rivets may be placed on the steel clad to enhance the shear resistance of the steel-concrete interface.
The utility model discloses the beneficial effect who gains is: the utility model solves the problems that the traditional cylinder type foundation steel cylinder wall is easy to bend, the connecting node of the cylinder wall and the outer chamber plate is stressed greatly, the outer chamber plate is too long and easy to bend, the bottom plate span is too large and can not support a mould, a moulding bed is required 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, not only has the advantages of the traditional cylinder type foundation of large bearing area, negative pressure sinking, one-step installation, good stability in site and the like, but also has the advantages that the cylinder wall and the outer chamber plate can not bend, the bottom plate span is reduced, the mould is convenient to support, the gravity center of the foundation floating transportation is low, the stability is good, the cost of the moulding bed is saved, the template is convenient to manufacture, the repeated utilization rate is high and the like, the stability of foundation sinking construction is improved, the comprehensive cost can be reduced by, the problem of the wall of original polygon section of thick bamboo type basis and outer storehouse board connected node atress big easy production destroy is solved, the outer storehouse board length has been reduced greatly, reduces outer storehouse board and aerifys easy bucking when sinking problem. Is suitable for most offshore areas with weak overburden 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 the polygonal cartridge of the present invention;
FIG. 5 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; 42. an outer deck; 43. an inner deck plate; 44. a load bearing steel column; 45. filling concrete; 411. the wall of the outer cylinder is coated with steel; 412. concrete for the outer cylinder wall; 413. and (4) riveting.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the utility model discloses an offshore wind power polygon cylindrical foundation, including changeover portion 1, polygon bottom plate 2, bottom plate girder system 3 and a polygon section of thick bamboo 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 cylinder 4 includes an outer cylinder wall 41, an outer chamber plate 42 and an inner chamber plate 43, the polygonal cylinder 4 and the polygonal bottom plate 2 enclose a cylinder-shaped cavity with a closed upper end and an open lower end, the outer chamber plate 42 and the inner chamber plate 43 are disposed in the cylinder-shaped cavity, the cylinder-shaped cavity is divided into a plurality of sub-chambers along an axis, the outer chamber plate 42 and the inner chamber plate 43 are connected by a circular bearing steel column 44, the bearing steel column 44 is filled with reinforced concrete, steel mesh concrete, and plain concrete, which is determined according to engineering conditions, and fig. 4 shows a condition of filling concrete 45. The line connecting the center of the inner chamber plate 43 (forming the polygonal area) and the center of the bearing steel column 44 is perpendicular to the outer cylinder wall 41. The outer cylinder wall 41 surrounds a regular hexagon structure, the side length is 18.5m, and the opposite side distance of the regular hexagon is 32.0 m; the inner bin plates 43 are parallel to the outer bin wall 41 and also surround into a regular hexagon structure, and six outer bin plates are arranged between the 43 connecting lines of the adjacent inner bin plates and the connecting lines of the corresponding outer bin wall 41; the height of the polygonal cylinder 4 is 16.0m, the thickness of the outer cylinder wall 41 is 300mm, and the thickness of the outer bin plate 42 and the inner bin plate 43 is 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.
As shown in fig. 5, the polygonal bottom plate 2 is disposed on the polygonal cylinder 4, has a thickness of 0.5m, and has an outer periphery in the shape of a regular hexagon having the same shape and size as the outer cylinder wall 41. 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.
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 invention. The present invention is not limited by the above-mentioned examples, and the present invention can be modified in various ways without departing from the spirit and scope of the present invention, and these modifications and improvements fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022210662.5U CN213625674U (en) | 2020-09-30 | 2020-09-30 | Offshore wind power polygonal cylinder foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022210662.5U CN213625674U (en) | 2020-09-30 | 2020-09-30 | Offshore wind power polygonal cylinder foundation |
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| Publication Number | Publication Date |
|---|---|
| CN213625674U true CN213625674U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022210662.5U Active CN213625674U (en) | 2020-09-30 | 2020-09-30 | Offshore wind power polygonal cylinder foundation |
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| Country | Link |
|---|---|
| CN (1) | CN213625674U (en) |
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- 2020-09-30 CN CN202022210662.5U patent/CN213625674U/en active Active
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