CN105862907B - Circular combined super-large diameter offshore wind farm single-pile foundation and its construction technology - Google Patents

Circular combined super-large diameter offshore wind farm single-pile foundation and its construction technology Download PDF

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Publication number
CN105862907B
CN105862907B CN201610386511.0A CN201610386511A CN105862907B CN 105862907 B CN105862907 B CN 105862907B CN 201610386511 A CN201610386511 A CN 201610386511A CN 105862907 B CN105862907 B CN 105862907B
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China
Prior art keywords
pile
junction steel
diameter
foundation
steel plate
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CN201610386511.0A
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Chinese (zh)
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CN105862907A (en
Inventor
宋启明
陈强
赖福梁
王磊
吴昀
丁欢欢
吴海涛
范夏玲
魏兵
张辉
张俊财
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Fujian Yongfu Power Engineering Co Ltd
Fujian Xinneng Offshore Wind Power R & D Center Co Ltd
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Fujian Yongfu Power Engineering Co Ltd
Fujian Xinneng Offshore Wind Power R & D Center Co Ltd
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Priority to CN201610386511.0A priority Critical patent/CN105862907B/en
Publication of CN105862907A publication Critical patent/CN105862907A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • E02D27/425Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations

Abstract

The present invention relates to a kind of circular combined super-large diameter offshore wind farm single-pile foundation and its construction technologies, it is characterised in that:Including the first single pile and the second single pile being mutually nested with, first, second single pile is steel-pipe pile, and two single piles weld to form an annular entirety by several junction steel plates being located between the two.The basis solve the problems, such ass that super-large diameter pile foundation construction is installed, improve pile foundation level bearing capacity and resistance to capsizing, the dynamic response of foundation structure is reduced, expands the scope of application of single-pile foundation, makes it possible 6MW, 8MW even Wind turbines of more capacity using single pile.Therefore, which there is high practical implementation to be worth.

Description

Circular combined super-large diameter offshore wind farm single-pile foundation and its construction technology
Technical field:
The present invention relates to a kind of circular combined super-large diameter offshore wind farm single-pile foundation and its construction technologies.
Background technology:
Due to the exacerbation of increasingly serious energy crisis and problem of environmental pollution, the utilization of regenerative resource is increasingly becoming people Research and development emphasis.Land wind-powered electricity generation has large-scale exploitation in recent years, but it has the shortcomings that many and restrictive condition, Therefore Oversea wind power generation initially enters people's sight with its unique advantage.The advantages of Oversea wind power generation, has:Wind energy on the sea provides Also more stable during the storage capacity Datong District of source, sea surface roughness is small, sea turn turbulence intensity is small, wind trimming is small, development efficiency higher, no There are the problem of environmental pollutions such as noise jamming, landscape destruction, are very suitable for developing on a large scale.
But the construction of marine wind electric field faces bigger difficulty, offshore wind turbine foundation design-build is considered as to cause sea An important factor for upper wind power cost is higher.
The structural shape of offshore wind plant wind turbine foundation can be divided into gravity type foundation, single-pile foundation, multicolumn basis, suction type Basis etc..
Single-pile foundation refers generally to single steel pipe pile foundation, is structurally characterized in that convenient and quick construction, good economy performance.Single pile base Plinth is made of a steel-pipe pile, and length of embedment is determined by the depth of water and geological conditions.Single-pile foundation is because at low cost, easy for construction And be applied widely in foreign countries, in Europe using the ratio of single-pile foundation up to more than 70%.Single-pile foundation be primarily subjected to wind, The horizontal loads such as wave, whether horizontal bearing performance is the key that it is applicable in.Since overall stiffness is relatively small, pile body position For migration toward larger, the structural dynamic response under wave, wind action is larger, easily generates fatigue damage and even fails.With The exploitation of offshore wind farm scale, Wind turbine single-machine capacity is increasing, 6MW, 8MW even offshore wind farm of more capacity Unit has been researched and developed successfully and has gradually put into application, and using traditional single pile pattern, the diameter and wall thickness of stake will dramatically increase, Diameter is likely to be breached 10 meters or more, both increases cost, simultaneously because the shortage of super-large diameter pile driving equipment, it can smooth construction It is implemented as the key of its application.
Invention content:
The purpose of the present invention is to provide circular combined super-large diameter offshore wind farm single-pile foundation and its construction technologies, should Single-pile foundation solve the problems, such ass super-large diameter single pile construction and installation, while significantly enhances the control to horizontal displacement It makes and uses, improve the load-carrying properties on basis, greatly reduce the horizontal displacement of structure, relative to simple increase diameter or thickness Degree has better economic benefit and application prospect.
The circular combined super-large diameter offshore wind farm single-pile foundation of the present invention, it is characterised in that:Including be mutually nested with One single pile and the second single pile, first, second single pile are steel-pipe pile, and two single piles are by being located between the two several Junction steel plate welds to form an annular entirety.
Further, above-mentioned first single pile diameter is less than 8 meters, the second single pile a diameter of 8 meters, 9 meters or the bigger.
Further, above-mentioned first single pile length is 30-100 meters, and second single pile is outside the first single pile, upper part Highly it is less than the first single pile, junction steel plate upper end extends at the top of the first single pile and plays distortion, and the second single pile lower part is comparable First single pile is short, and junction steel plate lower end can equally make stiffener pattern.
Further, above-mentioned junction steel plate is 3,4,5 or more.
Further, the space formed between above-mentioned two single pile with junction steel plate is perfused with concrete or embedding rock concrete Stake.
The construction technology of the circular combined super-large diameter offshore wind farm single-pile foundation of the present invention, the circular combined super large Diameter offshore wind farm single-pile foundation includes the first single pile and the second single pile that are mutually nested with, and first, second single pile is steel Pile pile, two single piles weld to form an annular entirety by several junction steel plates being located between the two;Construction procedure:
1) after the accurate setting-out of factory, the first single pile and the second single pile are made, it is single by junction steel plate welding first, second Stake combination is integral;
2) site operation marine site determines installation site where the basis;
3) prefabricated single-pile foundation is transported to corresponding position, lifting is had good positioning;
4) pile driving equipment is set on the first single pile top, piling operation is carried out to the first single pile, then the single-pile foundation is whole Accordingly squeeze into sea bed;
5) silt particle inside the annular space that cleaning single-pile foundation is formed, is irrigated concrete or drilling pours into embedding rock Stake;
6) blower fan tower barrel is installed in the first single pile upper end.
The present invention gives a kind of novel offshore wind farm super-large diameter single-pile foundation pattern, by large-diameter pile(First Single pile)With super-large diameter single pile(Second single pile)It is welded and fused by junction steel plate, when piling only hits large-diameter pile (First single pile), by the junction steel plate of annular space by super-large diameter single pile(Second single pile)Sea bed is squeezed into together.Squeeze into one After depthkeeping degree, the penetration concrete or according to the several embedding rocks of actual demands of engineering choice arrangement in the multiple annular spaces separated Paxilla does not need to penetration concrete or embedding rock in large-diameter pile, is greatly reduced while increase basic overall stiffness Concrete amount.Meanwhile the basis solve the problems, such ass that super-large diameter pile foundation construction is installed, and improves pile foundation level and holds Loading capability and resistance to capsizing reduce the dynamic response of foundation structure, expand the scope of application of single-pile foundation, make 6MW, The Wind turbines of 8MW even more capacities are possibly realized using single pile.Therefore, which has high engineering is practical should With value.
Description of the drawings:
Fig. 1 is the organigram of the present invention;
Fig. 2 is a kind of embodiment schematic diagram of junction steel plate;
Fig. 3 is junction steel plate another kind embodiment schematic diagram;
Fig. 4 is the A-A sectional views of Fig. 1;
Fig. 5 is the B-B sectional views of Fig. 1.
1 is large-diameter pile in figure(First single pile);2 be super-large diameter single pile(Second single pile);3 be junction steel plate;4 are Concrete perfusion or embedded rock pile;5 be blower fan tower barrel.
Specific embodiment:
The circular combined super-large diameter offshore wind farm single-pile foundation of the present invention, including the first single pile 1 for being mutually nested with and the Two single piles 2, first, second single pile are steel-pipe pile, and two single piles are by being located at several junction steel plates 3 between the two It is whole that welding forms an annular.
Further, above-mentioned first single pile diameter is less than 8 meters, the second single pile a diameter of 8 meters, 9 meters or the bigger.
Further, above-mentioned first single pile length is 30-100 meters, and second single pile is outside the first single pile, upper part Highly it is less than the first single pile, junction steel plate upper end extends at the top of the first single pile and plays distortion, and the second single pile lower part is comparable First single pile is short, and junction steel plate lower end can equally make stiffener pattern.
Further, above-mentioned junction steel plate is 3,4,5 or more.
Further, the space formed between above-mentioned two single pile with junction steel plate is perfused with concrete or embedding rock concrete-pile 4。
Junction steel plate 3 is an elongated plates, and upper and lower end has bevel edge, strong between the first single pile, the second single pile to increase Degree;Junction steel plate 3 or jagged thin slice, including multiple continuous inclined tab 301 and transverse sheet 302.It is closed to design First single pile and the second single pile, can be designed tapering by reason, 6 degree of the top-down taper of the first single pile, and the second single pile is from upper 3 degree of taper under and.In order to increase junction steel plate 3 and concrete or the bonding strength of embedding rock concrete-pile 4, in junction steel plate 3 One or two metal wires can be equipped on side surface along its length.
The construction technology of the circular combined super-large diameter offshore wind farm single-pile foundation of the present invention, the circular combined super large Diameter offshore wind farm single-pile foundation includes the first single pile and the second single pile that are mutually nested with, and first, second single pile is steel Pile pile, two single piles weld to form an annular entirety by several junction steel plates being located between the two;Construction procedure:
1) after the accurate setting-out of factory, the first single pile and the second single pile are made, it is single by junction steel plate welding first, second Stake combination is integral;
2) site operation marine site determines installation site where the basis;
3) prefabricated single-pile foundation is transported to corresponding position, lifting is had good positioning;
4) pile driving equipment is set on the first single pile top, piling operation is carried out to the first single pile, then the single-pile foundation is whole Accordingly squeeze into sea bed;
5) silt particle inside the annular space that cleaning single-pile foundation is formed, is irrigated concrete or drilling pours into embedding rock Stake 4;
6) blower fan tower barrel 5 is installed in the first single pile upper end.
The present invention gives a kind of novel offshore wind farm super-large diameter single-pile foundation pattern, by large-diameter pile(First Single pile)With super-large diameter single pile(Second single pile)It is welded and fused by junction steel plate, when piling only hits large-diameter pile (First single pile), by the junction steel plate of annular space by super-large diameter single pile(Second single pile)Sea bed is squeezed into together.Squeeze into one After depthkeeping degree, the penetration concrete or according to the several embedding rocks of actual demands of engineering choice arrangement in the multiple annular spaces separated Paxilla does not need to penetration concrete or embedding rock in large-diameter pile, is greatly reduced while increase basic overall stiffness Concrete amount.Meanwhile the basis solve the problems, such ass that super-large diameter pile foundation construction is installed, and improves pile foundation level and holds Loading capability and resistance to capsizing reduce the dynamic response of foundation structure, expand the scope of application of single-pile foundation, make 6MW, The Wind turbines of 8MW even more capacities are possibly realized using single pile.Therefore, which has high engineering is practical should With value.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with Modification should all belong to the covering scope of the present invention.

Claims (1)

1. a kind of construction technology of circular combined super-large diameter offshore wind farm single-pile foundation, it is characterised in that:It is circular combined Super-large diameter offshore wind farm single-pile foundation includes the first single pile and the second single pile that are mutually nested with, and first, second single pile is equal For steel-pipe pile, two single piles weld to form an annular entirety by several junction steel plates being located between the two;Described One single pile diameter is less than 8 meters, the second single pile a diameter of 8 meters, 9 meters or the bigger;The first single pile length is 30-100 meters, Second single pile is outside the first single pile, and upper part height is less than the first single pile, and junction steel plate upper end extends to the first single pile Distortion is played at top, and the second single pile lower part is short than the first single pile, and junction steel plate lower end can equally make stiffener pattern; Junction steel plate is jagged thin slice, and including multiple continuous inclined tab and transverse sheet, the first single pile and the second single pile are designed to bore Degree, 6 degree of the top-down taper of the first single pile, 3 degree of the top-down taper of the second single pile, in junction steel plate side surface upper edge its Length direction is equipped with one or two metal wires;The junction steel plate is 3,4,5 or more;Between two single pile The space formed with junction steel plate is perfused with concrete or embedding rock concrete-pile;Construction procedure:
1) after the accurate setting-out of factory, the first single pile and the second single pile are made, first, second single pile group is welded by junction steel plate Synthesis is whole;
2) site operation marine site determines installation site where the basis;
3) prefabricated single-pile foundation is transported to corresponding position, lifting is had good positioning;
4) pile driving equipment is set on the first single pile top, piling operation is carried out to the first single pile, then the single-pile foundation is integrally corresponding Squeeze into sea bed;
5) silt particle inside the annular space that cleaning single-pile foundation is formed, is irrigated concrete or drilling pours into embedded rock pile;
6) blower fan tower barrel is installed in the first single pile upper end.
CN201610386511.0A 2016-06-04 2016-06-04 Circular combined super-large diameter offshore wind farm single-pile foundation and its construction technology Active CN105862907B (en)

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CN106812152A (en) * 2017-03-01 2017-06-09 南通庞源机械工程有限公司 A kind of water surface pours the installation method of foundation for tower crane
CN108505533B (en) * 2018-04-19 2020-04-14 广东工业大学 Offshore wind power single-pile foundation mechanism and construction method thereof
CN109457719B (en) * 2018-10-25 2021-02-09 中国能源建设集团广东省电力设计研究院有限公司 Single pile foundation and foundation pile structure thereof
CN110080272A (en) * 2019-04-25 2019-08-02 上海交通大学 Offshore wind farm single-pile foundation and offshore wind farm device suitable for greater coasting area
CN112627223A (en) * 2020-12-18 2021-04-09 中国能源建设集团广东省电力设计研究院有限公司 Double-shell single-pile foundation and installation method thereof

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JP4713297B2 (en) * 2005-10-20 2011-06-29 新日本製鐵株式会社 Foundation structure and construction method of foundation structure
CN201506979U (en) * 2009-09-14 2010-06-16 中国水利水电科学研究院 Grouting connection structure for pile foundation and jacket leg of offshore wind turbine
CN102733407A (en) * 2011-04-01 2012-10-17 上海同济启明星科技发展有限公司 Two-ring grouted single pile foundation
CN103967036B (en) * 2014-05-07 2016-12-07 中国水电顾问集团华东勘测设计研究院有限公司 Stake and sleeve grouting attachment structure and construction method thereof for offshore wind farm
CN104153384A (en) * 2014-08-22 2014-11-19 熊翱 On-sea sandwich steel pipe pile foundation and construction method
CN205776312U (en) * 2016-06-04 2016-12-07 福建省新能海上风电研发中心有限公司 Circular combined super-large diameter offshore wind farm single-pile foundation

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