CN101545462B - A steel-concrete combined weight type offshore wind fan foundation structure - Google Patents

A steel-concrete combined weight type offshore wind fan foundation structure Download PDF

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Publication number
CN101545462B
CN101545462B CN2009101365825A CN200910136582A CN101545462B CN 101545462 B CN101545462 B CN 101545462B CN 2009101365825 A CN2009101365825 A CN 2009101365825A CN 200910136582 A CN200910136582 A CN 200910136582A CN 101545462 B CN101545462 B CN 101545462B
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China
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steel
reinforced concrete
offshore wind
steel reinforced
weight type
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Expired - Fee Related
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CN2009101365825A
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CN101545462A (en
Inventor
黄维平
赵战华
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Ocean University of China
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Ocean University of China
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/727Offshore wind turbines

Abstract

The present invention discloses a steel-concrete combined weight type offshore wind turbine foundation structure, relating to foundation structure of offshore wind turbine. The steel pipe vertical column is provided with steel bearing platform on the top; several section bar concrete rib boards are uniformly disposed at outer surface of lower end of steel pipe vertical column; outer end of section steel concrete rib board is fixed in inner surface of polygonal section steel concrete base; Several rib boards are uniformly and radially distributed around center origin of bottom surface of section steel concrete base; adjacent two rib boards has skirt at outer edge, height of rib board is identical with that of rib boards; bottom surface of section steel concrete base is provided with several grouting holes and anchor rod holes. The steel-concrete combined weight type offshore wind turbine foundation structure provided by the present invention has reasonable structure, increases water depth applicability of weight type offshore wind turbine foundation structure, develops seabed applicability of weight type offshore wind turbine foundation structure and enables to adapt to soft base seabed and scouring seabed, reduces cost of offshore wind turbine foundation structure for 10-30 m depth adjacent sea. Compared with pile foundation structure, the offshore wind fan foundation structure has few construction difficulty and short construction period.

Description

A kind of steel-concrete combined weight type offshore wind fan foundation structure
Technical field
The present invention relates to the fondational structure of offshore wind farm unit, a kind of specifically steel-concrete combined weight type offshore wind fan foundation structure.
Background technique
Offshore wind farm unit fondational structure is the key structure that marine wind electric field is built, its cost determination marine wind electric field can realize generating electricity by way of merging two or more grid systems, become the alternative energy source of traditional energy.
At present, offshore wind farm unit fondational structure mainly contains gravity structure, single pile structure, tripod structure, jacket structure and floating structure.Wherein, the maximum water depth that gravity structure is suitable for is 10m, and the suitable depth of water of single pile structure is 10~30m, and the suitable depth of water of tripod structure is 30~40m, and the suitable depth of water of jacket structure is 40~50m, and the suitable depth of water of floating structure then is more than the 50m.Its cost also increases with structural type and two factors of the depth of water, as: under the same depth of water condition, the cost of single pile structure is greater than gravity structure, and the cost of tripod structure is greater than the single pile structure, the cost of jacket structure is greater than tripod structure, and the cost of floating structure is greater than jacket structure.
The cost of offshore wind farm unit fondational structure is the bottleneck of restriction marine wind electric field development, it accounts for 14~16% of marine wind electric field gross investment, and the cost of land wind energy turbine set fondational structure only accounts for 3~5%, this shows, reducing offshore wind farm unit fondational structure cost is extremely important, to a certain extent, determined the development of offshore wind farm cause.Therefore, developing cheaply, offshore wind farm unit fondational structure is the most important thing of offshore wind farm industry.Both at home and abroad all dropped into great amount of manpower and carried out relevant research work with material resources, European then developing focus is placed on the research of concrete gravity formula fondational structure because the cost of concrete structure is lower than steel structure, emphasis is a method of construction.
At present, marine wind electric field both domestic and external is all built the marine site of the following depth of water of 20m in, and the suitable depth of water of concrete gravity formula structure is 10m to the maximum.Its reason is that the column and the cushion cap of concrete gravity formula structure is heavier, and along with the increase of the depth of water, the height of column and cushion cap increases, thereby center of gravity improves, and stability of structure is reduced.In addition, therefore the inapplicable soft basic seabed of traditional gravity structure and wash away the seabed, makes the application of gravity structure be subjected to great restriction.At present, the marine wind electric field of the following depth of water of 20m adopts the single pile structure more, makes the cost of investment of marine wind electric field high.
The single pile structure adopts hydraulic pile hammer with steel pipe pile injection seabed, and the upper end is exposed the sea and adjusted the perpendicularity of stake with pile cover, and is connected with pylon.Pile cover adopts grouting to be connected with stake.It mainly is because the steel column length change in its suitable depth of water scope only be the increase of ocean environment load to the influence of fondational structure that the single pile structure can be used the bigger depth of water (comparing with gravity structure), and the unstability of structure itself does not have very big variation.And the increase of environmental load can solve by the embedded depth that increases stake, and conventional concrete gravity structure is can't be obtained just for this.
The construction cost of single pile structure is than concrete gravity formula structure height, long, required construction equipment complexity of marine guidance piling engineering time, thereby construction cost is also higher, the grouting process of pile cover is complicated, has also increased the cost of single pile structure.But, be still the main structure form of shallow sea marine wind electric field at present because of its good scour resistance.
As seen by above-mentioned, there is following shortcoming in prior art:
1, the suitable depth of water scope of concrete gravity formula structure is little;
2, concrete gravity formula structure only is suitable for the hard seabed, and inapplicable soft basic seabed and wash away the seabed;
3, the steel structure cost height of coastal waters offshore wind farm fondational structure;
4, the construction difficulty of single pile structure is big, long in time limit.
Summary of the invention
At the defective that exists in the prior art, the object of the present invention is to provide a kind of steel-concrete combined weight type offshore wind fan foundation structure, rational in infrastructure, increase the suitable depth of water of weight type offshore wind fan foundation structure, expand the suitable sub sea conditions of weight type offshore wind fan foundation structure, make its suitable soft basic seabed and wash away the seabed, reduced the cost of the offshore wind farm unit fondational structure in 10~30m depth of water coastal waters, compare little, the short construction period of its offshore construction difficulty with pile foundation structure.
For reaching above purpose, the technological scheme that the present invention takes is:
A kind of steel-concrete combined weight type offshore wind fan foundation structure, comprise steel pipe post 1, steel pipe post 1 top is provided with steel cushion cap 2, it is characterized in that: the outer surface of steel pipe post 1 lower end is provided with some steel reinforced concrete gussets 3 uniformly, the outer end of steel reinforced concrete gusset 3 is fixed on the internal surface of polygonal steel reinforced concrete pedestal 4, the bottom surface of steel reinforced concrete pedestal 4 is initial point with the center, be provided with some floors 5 radially equably, the outer end of two adjacent floors 5 is provided with shirt rim 6, the height of floor 5 is identical with shirt rim 6, and the bottom surface of steel reinforced concrete pedestal 4 is provided with some grout holes 7 and bolthole 8.
On the basis of technique scheme, the bottom surface of the bottom surface of steel reinforced concrete gusset 3 and steel reinforced concrete pedestal 4 maintains an equal level, the end face of steel reinforced concrete gusset 3 is the inclined-plane, and with the end face of steel pipe post 1 joint on earth identity distance from maximum, with the end face of steel reinforced concrete pedestal 4 joints on earth identity distance from minimum.
On the basis of technique scheme, the shaped steel skeleton and the steel pipe post 1 of steel reinforced concrete gusset 3 are welded to connect, and the shaped steel skeleton of steel reinforced concrete gusset 3 and the shaped steel skeleton of steel reinforced concrete pedestal 4 are welded to connect.
On the basis of technique scheme, the bottom surface of the steel reinforced concrete pedestal 4 that two adjacent floors are 5 is provided with a grout hole 7 and bolthole 8, and near shirt rim 6, grout hole 7 is than the bottom center of bolthole 8 near steel reinforced concrete pedestal 4 than grout hole 7 for bolthole 8.
Steel-concrete combined weight type offshore wind fan foundation structure of the present invention, rational in infrastructure, increase the suitable depth of water of weight type offshore wind fan foundation structure, expand the suitable sub sea conditions of weight type offshore wind fan foundation structure, make its suitable soft basic seabed and wash away the seabed, reduced the cost of the offshore wind farm unit fondational structure in 10~30m depth of water coastal waters, compared, little, the short construction period of its offshore construction difficulty with pile foundation structure.
Description of drawings
The present invention has following accompanying drawing:
The structural representation of Fig. 1 steel-concrete combined weight type offshore wind fan foundation structure
Fig. 2 steel reinforced concrete pedestal 4 look up structural representation
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As Fig. 1, shown in 2, steel-concrete combined weight type offshore wind fan foundation structure of the present invention, comprise steel pipe post 1, steel pipe post 1 top is provided with steel cushion cap 2, the outer surface of steel pipe post 1 lower end is provided with some steel reinforced concrete gussets 3 uniformly, the outer end of steel reinforced concrete gusset 3 is fixed on the internal surface of polygonal steel reinforced concrete pedestal 4, the bottom surface of steel reinforced concrete pedestal 4 is initial point with the center, be provided with some floors 5 radially equably, the outer end of two adjacent floors 5 is provided with shirt rim 6, the height of floor 5 is identical with shirt rim 6, and the bottom surface of steel reinforced concrete pedestal 4 is provided with some grout holes 7 and bolthole 8.
On the basis of technique scheme, the bottom surface of the bottom surface of steel reinforced concrete gusset 3 and steel reinforced concrete pedestal 4 maintains an equal level, the end face of steel reinforced concrete gusset 3 is the inclined-plane, and with the end face of steel pipe post 1 joint on earth identity distance from maximum, with the end face of steel reinforced concrete pedestal 4 joints on earth identity distance from minimum.
On the basis of technique scheme, the shaped steel skeleton and the steel pipe post 1 of steel reinforced concrete gusset 3 are welded to connect, and the shaped steel skeleton of steel reinforced concrete gusset 3 and the shaped steel skeleton of steel reinforced concrete pedestal 4 are welded to connect.
On the basis of technique scheme, the bottom surface of the steel reinforced concrete pedestal 4 that two adjacent floors are 5 is provided with a grout hole 7 and bolthole 8, and near shirt rim 6, grout hole 7 is than the bottom center of bolthole 8 near steel reinforced concrete pedestal 4 than grout hole 7 for bolthole 8.
Technological scheme of the present invention adopts steel pipe post to add the steel suspended deck structure as the linkage section of basis with wind-driven generator tower frame as mentioned above, and the concrete column that has substituted existing gravity structure adds the structure of concrete bearing platform; Adopt the pedestal of reinforced concrete composite structure to substitute reinforced concrete plinth, to increase the whole anti-bending strength of pedestal, for soft basic seabed, can adopt anchor rod anchored method to increase the resistance to capsizing of structure, make the suitable depth of water of structure extend to 30m by 10m; Simultaneously, protection against erosion and antiskid structure that floor and skirtboard are formed, the suitable sub sea conditions that makes structure is expanded to soft basic seabed and is washed away sub sea conditions by the hard sub sea conditions of traditional gravity structure.It is to be convenient to being connected of pedestal and steel pipe post that the present invention adopts the reason of reinforced concrete composite structure pedestal, reduces the difficulty of construction of pedestal.Pedestal adopts with being connected of column and is welded to connect, specifically---the shaped steel skeleton of the shaped steel skeleton of steel reinforced concrete gusset and steel pipe post, steel reinforced concrete gusset and the shaped steel skeleton of steel reinforced concrete pedestal all adopt and are welded to connect, thereby make steel pipe post, steel reinforced concrete pedestal and steel reinforced concrete gusset form whole steel frame construction.Steel cushion cap and steel pipe post adopt and are welded to connect, and leave flange hole on the steel cushion cap, so that be connected with the generator pylon.The steel reinforced concrete pedestal is provided with bolthole and grout hole, increases the resistance to capsizing of pedestal and the bearing capacity in soft basic seabed by corresponding construction process.
Principle of the present invention can be summarized as follows:
1, since the weight of steel structure well below the concrete structure weight of equality strength, therefore, steel pipe post of the present invention adds the steel suspended deck structure and can solve owing to the depth of water increases the concrete gravity formula fondational structure center of gravity cause and raise, the shortcoming that structure stability reduces, thus the suitable depth of water of gravity type foundation structure increased.It is 10m that the maximum of tradition gravity structure is suitable for the depth of water, and the suitable depth of water of maximum of the present invention is 30m.
2, the present invention is increased to 30m with the suitable depth of water of gravity type foundation structure, and the existing solution of this depth of water is single pile structure or tripod structure.These two kinds of structures are the pile foundation steel structure, and not only construction cost height, and construction difficulty is big, long construction period.And the construction cost of technological scheme of the present invention is low, construction technology is simple, short construction period, therefore, the present invention substitutes the pile foundation steel structure of this depth of water with gravity structure, greatly reduce construction cost, difficulty of construction and the construction period of offshore wind farm unit fondational structure, thereby reduced the construction cost of marine wind electric field.Gravity type foundation structure construction technology difficulty of the present invention is little, by gravity and negative pressure method structure is kept flat to the seabed, and the perpendicularity of steel pipe post can be adjusted by the negative pressure method, and the technical difficulty of grouting and anchor bolt construction is little, therefore, short construction period, construction cost is low.
3, the present invention can adopt pedestal protection against erosion structure (floor adds shirt rim, grouting and anchor pole), the sub sea conditions that gravity structure is suitable for is expanded to soft basic seabed by original hard seabed and is washed away sub sea conditions, make the marine site of original only suitable pile foundation steel structure can adopt gravity structure, thereby greatly reduce the construction cost of marine wind electric field.

Claims (5)

1. steel-concrete combined weight type offshore wind fan foundation structure, comprise steel pipe post (1), steel pipe post (1) top is provided with steel cushion cap (2), it is characterized in that: the outer surface of steel pipe post (1) lower end is provided with some steel reinforced concrete gussets (3) uniformly, the outer end of steel reinforced concrete gusset (3) is fixed on the internal surface of polygonal steel reinforced concrete pedestal (4), the bottom surface of steel reinforced concrete pedestal (4) is initial point with the center, be provided with some floors (5) radially equably, the outer end of adjacent two floors (5) is provided with shirt rim (6), the height of floor (5) is identical with shirt rim (6), and the bottom surface of steel reinforced concrete pedestal (4) is provided with some grout holes (7) and bolthole (8).
2. steel-concrete combined weight type offshore wind fan foundation structure as claimed in claim 1, it is characterized in that: the bottom surface of the bottom surface of steel reinforced concrete gusset (3) and steel reinforced concrete pedestal (4) maintains an equal level, the end face of steel reinforced concrete gusset (3) is the inclined-plane, and with the end face of steel pipe post (1) joint on earth identity distance from maximum, with the end face of steel reinforced concrete pedestal (4) joint on earth identity distance from minimum.
3. steel-concrete combined weight type offshore wind fan foundation structure as claimed in claim 1 or 2, it is characterized in that: the shaped steel skeleton of steel reinforced concrete gusset (3) and steel pipe post (1) are welded to connect, and the shaped steel skeleton of the shaped steel skeleton of steel reinforced concrete gusset (3) and steel reinforced concrete pedestal (4) is welded to connect.
4. steel-concrete combined weight type offshore wind fan foundation structure as claimed in claim 1 or 2, it is characterized in that: the bottom surface of the steel reinforced concrete pedestal (4) between adjacent two floors (5) is provided with a grout hole (7) and bolthole (8), and bolthole (8) is than the close shirt rim (6) of grout hole (7), and grout hole (7) is than the bottom center of the close steel reinforced concrete pedestal (4) of bolthole (8).
5. steel-concrete combined weight type offshore wind fan foundation structure as claimed in claim 3, it is characterized in that: the bottom surface of the steel reinforced concrete pedestal (4) between adjacent two floors (5) is provided with a grout hole (7) and bolthole (8), and bolthole (8) is than the close shirt rim (6) of grout hole (7), and grout hole (7) is than the bottom center of the close steel reinforced concrete pedestal (4) of bolthole (8).
CN2009101365825A 2009-05-08 2009-05-08 A steel-concrete combined weight type offshore wind fan foundation structure Expired - Fee Related CN101545462B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102338046A (en) * 2010-07-15 2012-02-01 陈文渊 Offshore type wind power generation device and base thereof
CN102878028A (en) * 2012-09-26 2013-01-16 广东明阳风电产业集团有限公司 Structure for connecting tower of wind driven generator and fishplates of foundation
CN105201008B (en) * 2015-07-22 2020-04-03 清华大学 Pin type bending-resistant longitudinal connecting joint and construction method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1867769A (en) * 2003-10-17 2006-11-22 爱罗丁工程有限公司 Foundation for an offshore wind energy plant
CN101169108A (en) * 2006-10-25 2008-04-30 天津市海恩海洋工程技术服务有限公司 Oversea wind power generation tower structure and its mounting method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1867769A (en) * 2003-10-17 2006-11-22 爱罗丁工程有限公司 Foundation for an offshore wind energy plant
CN101169108A (en) * 2006-10-25 2008-04-30 天津市海恩海洋工程技术服务有限公司 Oversea wind power generation tower structure and its mounting method

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