CN110080272A - Offshore wind farm single-pile foundation and offshore wind farm device suitable for greater coasting area - Google Patents
Offshore wind farm single-pile foundation and offshore wind farm device suitable for greater coasting area Download PDFInfo
- Publication number
- CN110080272A CN110080272A CN201910339672.8A CN201910339672A CN110080272A CN 110080272 A CN110080272 A CN 110080272A CN 201910339672 A CN201910339672 A CN 201910339672A CN 110080272 A CN110080272 A CN 110080272A
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- wind farm
- upper segment
- offshore wind
- pile foundation
- steel pipe
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Classifications
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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
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
- Foundations (AREA)
Abstract
The present invention provides a kind of offshore wind farm single-pile foundations and offshore wind farm device suitable for greater coasting area, including single-column base matrix, the single-column base matrix includes external steel pipe, internal steel pipe and concrete-filled double skin steel tube, wherein: the external steel pipe includes the upper segment set gradually from top to bottom, changeover portion and lower section, the upper segment, changeover portion and lower section coaxial arrangement, the diameter of upper segment are less than the diameter of lower section；The internal steel pipe is arranged in the upper segment, and is coaxially disposed with upper segment；The concrete-filled double skin steel tube setting is between upper segment and internal steel pipe.The present invention reduces the diameters for being located at single-pile foundation in seawater, pure steel-tube construction is replaced by concrete-filled double skin steel tube, guarantee the enough strength and stiffness of structure simultaneously, without more increasing Master Cost, compared to pure steel-tube construction, have the characteristics that the jolt capacity of big bending stiffness, big, the anti-sea ice of damping or ship is strong.
Description
Technical field
The present invention relates to offshore wind farm fields, and in particular, to suitable for the offshore wind farm single-pile foundation of greater coasting area and sea
Upper wind generator.
Background technique
In recent years, offshore wind farm was at home and abroad rapidly progressed, and gradually by shallow sea (0-30m) Xiang Jinhai (30-
50m) extended with deep-sea (> 50m).But it is that construction cost is expensive and lead that offshore wind farm development at present, which encounters a stern challenge,
Valence is sent a telegraph much higher than the electricity prices such as thermoelectricity, water power and land wind-powered electricity generation in the market, and more prominent with sea water advanced increase, if
There is no government finance subsidy, is difficult sustainable development and goes down.Therefore, reducing electricity price becomes one that global offshore wind farm development faces
Critical issue.At sea in wind-powered electricity generation total investment for construction, basic cost accounts for about 20-35%, therefore passes through innovation offshore wind power foundation, drop
Its low construction cost is to reduce one of the effective means of offshore wind farm electricity price, is had very to promotion offshore wind farm sustainable development
Important meaning.
Currently, in built domestic and international marine wind electric field, due to traditional single-pile foundation structure form is simple, processing and
It is easy for installation, different geological conditions are applicable to, are widely used in offshore wind farm construction.Its basic structure is mainly by big straight
Diameter steel-pipe pile and linkage section composition, stake and linkage section generally use flanged joint using grouting connection, linkage section and top pylon.
Currently, the offshore wind farm in the whole world about 75% selects single-pile foundation, it is all located at neritic province domain, diameter generally about 3-8m greatly, stake is buried
Depth is 20-40m, is usually master control design load by wave and wind-induced long-term horizontal whirl-sprayed pile.In recent years, with sea
Enlarging of the upper wind-powered electricity generation from shallow sea to greater coasting area, sea water advanced increase cause a diameter and embedded depth further to increase, material,
Manufacture and installation cost can all be significantly increased.Sea water advanced to increase to 40-50m from 10-20m, foundation cost increases about twice.
The external environment load that offshore wind farm single-pile foundation is born mainly includes wind load and wave load.Wherein, wind lotus
Load is determined by wind field environmental condition and fan parameter, is not directly dependent upon with sea water advanced.And wave load not only with wind field ring
Border condition is related, and has direct relationship with the diameter of single-pile foundation.Such as according to offshore wind farm design specification DNV Wave power meter
Calculation method is it is found that wave force is made of inertia force and drag two parts, wherein square directly proportional, the towing of inertia force and stake diameter
Power is directly proportional to the first power of stake diameter, and inertia force often occupies larger specific gravity.
F in formulaMFor inertia force, FDFor drag, D is single pile diameter, and ρ is density of sea water,For velocity of wave translation,For wave
Unrestrained acceleration, d are sea water advanced；CMAnd CDRespectively inertia force and towing force coefficient.
Therefore, with sea water advanced increase, in order to meet wanting for offshore wind farm overall structural strength, rigidity and dynamic characteristics
It asks, just will definitely increase the diameter of pile foundation, the load for the wave for causing foundation structure to be born can increase rapidly.Load increases
Afterwards, will lead to single pile diameter, length and wall thickness will increase, and substantially increase material, processing and the peace of traditional single-pile foundation
The expenses such as dress.
Therefore, traditional view thinks that single-pile foundation is not suitable for being built in wind field of the depth of water greater than 30m.
Application No. is 201610386511.0 patents of invention to disclose a kind of circular combined super-large diameter offshore wind farm
Single-pile foundation and its construction technology, it is characterised in that: including the first single pile and the second single pile being mutually nested with, described first,
Two single piles are steel-pipe pile, and two single piles pass through several junction steel plates for being located between the two and weld that form an annular whole
Body.The basis solves the problems, such as that super-large diameter pile foundation construction is installed, and improves pile foundation level bearing capacity and inclines with anti-
Ability is covered, the dynamic response of foundation structure is reduced, expands the scope of application of single-pile foundation, makes 6MW, 8MW even more great Rong
The Wind turbines of amount are possibly realized using single pile.Therefore, which there is high practical implementation to be worth.But
Above-mentioned patent has following defects that in sea water advanced deeper marine wind field, wave load is often the master control load designed,
And formerly patent is by the way that on single pile inside, the structure type of a piece single pile of peripheral hardware makes single-pile foundation be located at the diameter in seawater
Increase, so as to greatly increase the wave load of its receiving, to need to increase the embedded depth of stake, to increase pile material
Expense and construction cost.First patent is set with by two steel pipes, then the mode of intermediate concrete perfusion, it is desirable to increase pile foundation
Its ultimate bearing capacity and resistance to capsizing.But most of large diameter single pile foundation, typically belong to rigid pile, horizontal bearing energy
Power and resistance to capsizing are not determined by stake strength and stiffness itself, are determined by the intensity of periphery soil, so improving stake
Intensity itself helps its Its ultimate bearing capacity and resistance to capsizing limited.The part of first patent of invention stake is buried diameter increasing
Add, not only increase the dosage of material, simultaneously because diameter increases, leads to increased costs of driving piles.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of offshore wind farm single piles suitable for greater coasting area
Basis.
A kind of offshore wind farm single-pile foundation suitable for greater coasting area provided according to the present invention, including single-column base matrix,
The single-column base matrix includes external steel pipe, internal steel pipe and concrete-filled double skin steel tube, in which:
The external steel pipe includes the upper segment set gradually from top to bottom, changeover portion and lower section, the upper segment,
Changeover portion and lower section coaxial arrangement, the diameter of upper segment are less than the diameter of lower section；
The internal steel pipe is arranged in the upper segment, and is coaxially disposed with upper segment；
The concrete-filled double skin steel tube setting is between upper segment and internal steel pipe.
Preferably, the lower section and changeover portion are arranged below sea level, and the lower section is embedded in below sea bed face.
Preferably, the upper end of the upper segment is higher than sea level.
Preferably, upper segment, changeover portion and lower section integrated setting.
Preferably, the concrete-filled double skin steel tube is identical as the internal length of steel pipe.
Preferably, the internal length of steel pipe is less than the length of the upper segment.
Preferably, the upper end of the upper segment is flanged ends.
Preferably, the lower part 25m-45m of the single-pile foundation ontology is embedded under sea bed face；The sea level is apart from sea bed
Face 30m-50m.
The present invention also provides a kind of offshore wind farm device, including Wind turbines, pylon, connecting flange and single-pile foundation,
Wherein:
The single-pile foundation bottom is embedded under sea bed face；
The flange welding is at the top of the single-pile foundation；
The pylon is threadedly coupled with the connecting flange；
The Wind turbines are arranged on the pylon.
Preferably, the tower height is 100m.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, The present invention reduces the diameters for being located at single-pile foundation in seawater, and then the wave of basis receiving is greatly reduced
Load, and wave load is usually master control design load in the deeper wind field of seawater, load reduction, which is meant that, can reduce
Pile foundation embedded depth, wall thickness and diameter reduce material, processing and construction cost to reach；
2, the present invention replaces pure steel-tube construction by concrete-filled double skin steel tube, after diameter reduction, guarantees structure foot
Enough strength and stiffness simultaneously, do not have to more increase Master Costs, while concrete structure with hollow sandwich compares clean steel pipe
Structure has the characteristics that the jolt capacity of big bending stiffness, big, the anti-sea ice of damping or ship is strong.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the offshore wind farm structural schematic diagram of single-pile foundation support；
Fig. 2 is the structural schematic diagram of single-pile foundation；
Fig. 3 is the structural schematic diagram of connecting flange；
Fig. 4 is the structural schematic diagram of external steel pipe；
Fig. 5 is the structural schematic diagram of internal steel pipe；
Fig. 6 is the structural schematic diagram of concrete-filled double skin steel tube.
It is shown in figure:
Single-pile foundation 1
Upper segment 101
Changeover portion 102
Lower section 103
Connecting flange 2
Pylon 3
Wind turbines 4
Internal steel pipe 5
Concrete-filled double skin steel tube 6
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
As shown in Figures 1 to 6, the present invention provides a kind of offshore wind farm single-pile foundations and sea turn suitable for greater coasting area
Electric installation, the offshore wind farm device of single-pile foundation support is referring to Fig. 1.Wind turbines are mounted on tower top, and tower height is general
It can reach 100m, depth of water 30-50m, single-pile foundation embedded depth is generally in 25-45m, according to blower single-machine capacity, wind field ring
Border and geological conditions determine.Single-pile foundation proposed by the present invention is shown in Fig. 2.Basic top surface is connecting flange (see Fig. 3), connecting flange
It is welded as a whole with the upper segment top of single-pile foundation, is connected by screw bolts with pylon.The external steel pipe of single-pile foundation is shown in Fig. 4.
It include upper segment, changeover portion and lower section according to location, upper segment, changeover portion and lower section are coaxial from top to bottom
Integrated setting.Lower section is embedded to part under sea bed mud face, this section diameter remains unchanged；It is then within part on mud face, is led to
Crossing changeover portion makes a diameter become smaller, and the length of changeover portion is related with sea water advanced and design parameter, and reduced diameter portion is divided into top
Section, upper segment extend on sea level, and extended position highest wave height corresponding with design wind field is related, then pass through company
Acting flange is connect with pylon.The parameters such as pile body total length, wall thickness and the diameter of upper segment, according to supported fan capacity, environment
Geological conditions determines.Fig. 5 is steel pipe inside the concrete-filled double skin steel tube of single-pile foundation part, and diameter does not change, and is grown
It spends identical as concrete segment length.Fig. 6 is high performance concrete section among concrete-filled double skin steel tube, and the self-compaction of use is high
Performance concrete.Concrete thickness and intensity are determined according to the geological conditions and fan design load of practical wind field.It is hollow
Interlayer steel tube concrete is arranged between internal steel pipe and upper segment.
If traditional steel canalis spinalis single-pile foundation is applied in the marine wind field of the 30-50m depth of water, the wave load of receiving compared with
Greatly, cause its diameter, length and wall thickness to increase, increase the expenses such as material, processing and construction.The present invention is located at sea by reducing
The diameter of the diameter of single-pile foundation in water, stake below mud face remains unchanged；Using concrete-filled double skin steel tube and steel pipe combination
Offshore wind farm single-pile foundation is made, single-pile foundation cost is reduced.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of offshore wind farm single-pile foundation suitable for greater coasting area, which is characterized in that including single-column base matrix, the single-column
Base matrix includes external steel pipe, internal steel pipe and concrete-filled double skin steel tube, in which:
The external steel pipe includes the upper segment set gradually from top to bottom, changeover portion and lower section, the upper segment, transition
Section and lower section coaxial arrangement, the diameter of upper segment are less than the diameter of lower section；
The internal steel pipe is arranged in the upper segment, and is coaxially disposed with upper segment；
The concrete-filled double skin steel tube setting is between upper segment and internal steel pipe.
2. the offshore wind farm single-pile foundation according to claim 1 suitable for greater coasting area, which is characterized in that the lower section
It is arranged below sea level with changeover portion, the lower section is embedded in below sea bed face.
3. the offshore wind farm single-pile foundation according to claim 1 suitable for greater coasting area, which is characterized in that the upper segment
Upper end be higher than sea level.
4. the offshore wind farm single-pile foundation according to claim 1 suitable for greater coasting area, which is characterized in that upper segment, mistake
Cross section and lower section integrated setting.
5. the offshore wind farm single-pile foundation according to claim 1 suitable for greater coasting area, which is characterized in that the hollow folder
Layer concrete filled steel tube is identical as the internal length of steel pipe.
6. the offshore wind farm single-pile foundation according to claim 1 suitable for greater coasting area, which is characterized in that the internal steel
Length of tube is less than the length of the upper segment.
7. the offshore wind farm single-pile foundation according to claim 1 suitable for greater coasting area, which is characterized in that the upper segment
Upper end be flanged ends.
8. the offshore wind farm single-pile foundation according to claim 2 suitable for greater coasting area, which is characterized in that the single pile base
The lower part 25m-45m of plinth ontology is embedded under sea bed face；The sea level is apart from sea bed face 30m-50m.
9. a kind of offshore wind farm device, which is characterized in that including Wind turbines, pylon, connecting flange and such as claim 1-8
Described in any item single-pile foundations, in which:
The single-pile foundation bottom is embedded under sea bed face；
The flange welding is at the top of the single-pile foundation；
The pylon is threadedly coupled with the connecting flange；
The Wind turbines are arranged on the pylon.
10. offshore wind farm device according to claim 9, which is characterized in that the tower height is 100m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910339672.8A CN110080272A (en) | 2019-04-25 | 2019-04-25 | Offshore wind farm single-pile foundation and offshore wind farm device suitable for greater coasting area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910339672.8A CN110080272A (en) | 2019-04-25 | 2019-04-25 | Offshore wind farm single-pile foundation and offshore wind farm device suitable for greater coasting area |
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| CN201910339672.8A Pending CN110080272A (en) | 2019-04-25 | 2019-04-25 | Offshore wind farm single-pile foundation and offshore wind farm device suitable for greater coasting area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236296A (en) * | 2019-12-18 | 2020-06-05 | 长江勘测规划设计研究有限责任公司 | Offshore wind power hollow interlayer concrete filled steel tube single pile foundation structure and construction method |
| CN113374649A (en) * | 2021-06-23 | 2021-09-10 | 同济大学 | Single-pile type offshore floating type fan vibration reduction control structure |
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| CN111236296A (en) * | 2019-12-18 | 2020-06-05 | 长江勘测规划设计研究有限责任公司 | Offshore wind power hollow interlayer concrete filled steel tube single pile foundation structure and construction method |
| CN113374649A (en) * | 2021-06-23 | 2021-09-10 | 同济大学 | Single-pile type offshore floating type fan vibration reduction control structure |
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