CN110397061A - A kind of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation and construction method - Google Patents

A kind of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation and construction method Download PDF

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Publication number
CN110397061A
CN110397061A CN201910633296.3A CN201910633296A CN110397061A CN 110397061 A CN110397061 A CN 110397061A CN 201910633296 A CN201910633296 A CN 201910633296A CN 110397061 A CN110397061 A CN 110397061A
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China
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pile foundation
rotary table
offshore wind
assistant reinforcement
wind farm
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王雪菲
李家乐
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Hebei University of Technology
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Hebei University of Technology
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations
    • 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
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/44Foundations for machines, engines or ordnance

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  • Engineering & Computer Science (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)
  • Structural Engineering (AREA)
  • Foundations (AREA)
  • Piles And Underground Anchors (AREA)
  • Wind Motors (AREA)

Abstract

The present invention relates to a kind of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation and construction methods, single-pile foundation includes single-pile foundation ontology, for hollow steel tubular pole, it is made of soil body inserting paragraph and soil body revealed section, it is equipped with peripheral rotary table two sections of interface upper ends, peripheral rotary table top end diameter is greater than single-pile foundation body diameter;Peripheral rotary table is the concrete rotary table of moulding by casting, interior to be equipped with stiffener, and stiffener and the weldering of single-pile foundation outer body face connect.Construction procedure are as follows: S1 land formation rotary table assistant reinforcement formula single-pile foundation;S2 lifts by crane pile foundation, so that pile foundation lower end is penetrated sea bed following depth using the self weight of hollow steel tubular pole and the ballast effect of peripheral rotary table;S3 piling is in close contact peripheral rotary table lower end and sea bed to predetermined depth.The single-pile foundation low cost, can suitable for deeper sea area and severeer marine environmental conditions, can reduce or prevent basis local scour, reinforcement effect is played to pile foundation;The construction method construction is simple, construction cost are low.

Description

A kind of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation and construction method
Technical field
The invention belongs to pile foundation protection technology fields, are related to pile foundation antiscour technology, and in particular to a kind of sea turn motor Group rotary table assistant reinforcement formula single-pile foundation and construction method.
Background technique
With people constantly increasing to offshore wind energy resource demand, Oversea wind unit is in the Enlargement Tendency, sea turn Electric field is promoted to deeper farther sea area, and blower is by the coupling from wind, wave, stream and ice load, service condition More complicated, this has higher requirement for the stability and adaptability of blower fan structure.At sea in Wind Power Project, blower base The construction of plinth part, transport, installation cost usually account for the 20%-40% of totle drilling cost, and this than regular meeting with the increasing of the depth of water Add and sustainable growth.The most common two kinds of base forms of offshore wind turbine are single-pile foundation and gravity type foundation at present.Wherein single pile Foundation construction work progress is relatively easy, and technology is more mature, but its adaptation depth of water is limited, and cost can be with the increase of the depth of water It is sharply increased.As the base form built earliest for offshore wind turbine, being usually used in single-pile foundation can not work gravity type foundation Region, but since its volume is big, weight is big, and must carry out the pretreatment in seabed in a pre-installation, so that transport installation It is sufficiently complex, lead to greatly improving for total cost.Therefore, economical and broad applicability offshore wind turbine foundation shape is designed Formula is very necessary.Some novel foundation forms are paid close attention in recent years, such as bucket foundation, and this foundation construction is easy, recycling Relatively easily, but previous design specification is not used in the construction of bucket foundation, and this basis is caused to be not yet received extensively Using.
It retrieves, does not retrieve and this patent analogous technical scheme through the prior art.
Summary of the invention
It is an object of the invention in place of overcome the deficiencies in the prior art, provide a kind of offshore wind farm unit rotary table auxiliary plus Strong formula single-pile foundation and construction method, the single-pile foundation low cost, convenient for construction, deeper sea area and severeer can be suitable for Marine environmental conditions in, can reduce or prevent basis local scour, so as to play reinforcement effect to pile foundation;The single pile base The construction method construction is simple of plinth, construction cost are low.
Above-mentioned purpose of the invention is realized by following technical solution:
A kind of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation, it is characterised in that: single including single-pile foundation ontology Pile foundation ontology uses hollow steel pipe pilework, and single-pile foundation ontology is by extending into the soil body inserting paragraph of sea bed lower part and exposing to Soil body revealed section above sea bed is constituted, and the interface upper end of soil body inserting paragraph and soil body revealed section is provided with peripheral rotary table, The periphery rotary table is fixedly and coaxially connected with single-pile foundation ontology, and the top end diameter of the periphery rotary table is greater than single-pile foundation The outer diameter of ontology;The periphery rotary table is the concrete frustum cone structure of moulding by casting, and reinforcement steel is provided in concrete rotary table The lateral surface of muscle, stiffener and single-pile foundation ontology, which welds, to be connected.
And, the stiffener is upper layer and lower layer, two layers of stiffener along the circumferential direction radial arrangement.
And, the lower part outside diameter of the periphery rotary table is 1.5-3 times of single-pile foundation ontology diameter.
A kind of construction method of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation, which is characterized in that single-pile foundation Using the above structure, construction method are as follows:
S1 land formation rotary table assistant reinforcement formula single-pile foundation, specific:
A, preferred selected setting diameter and the hollow steel tubular pole of setting length are as single-pile foundation ontology;
B, the position welding stiffener set on hollow steel tubular pole lateral wall;
C, the position of hollow steel tubular pole welding stiffener is placed in prefabricated rotary table molding die;
D, it is poured concrete in rotary table molding die, after concrete curing, forms peripheral rotary table;
S2 lifts by crane single-pile foundation, uses gravitational settling first, utilizes the self weight of hollow steel tubular pole and the ballast of peripheral rotary table Effect makes pile foundation lower end penetrate sea bed following depth;
S3 then drives piles to predetermined depth, is in close contact the lower end of peripheral rotary table and sea bed, needs during the installation process The tilt angle of monitoring single-pile foundation, strict control are horizontal closely.
And, in S2 before lifting by crane single-pile foundation, along the circumferential direction lays and multiple incline in the upper surface of peripheral rotary table Angle instrument, inclinator are connect by data line with the display equipment being arranged on piling construction platform.
The present invention has the advantage that and good effect:
1, the present invention reinforces offshore wind turbine single-pile foundation using concrete frustum cone structure, has preferably carrying special Property, it can be suitable for deeper sea area and severeer marine environmental conditions.
2, the present invention is the combination of traditional single-pile foundation and gravity type foundation, and the mature design of two kinds of traditional infrastructure forms is quasi- It then can be used in design and construction of the invention, can reduce initial stage scientific research cost, there are good economic benefits.
3, concrete rotary table of the present invention is seated on sea bed, using the section feature of rotary table, can effectively disperse rushing for ocean current It hits, reduces undermining, avoid the formation of scour hole, pier bottom scour, so that the local scour on basis is reduced or prevented, to pile foundation Play reinforcement effect.
4, the construction method of single-pile foundation of the present invention, using the knot of gravitational settling and existing single-pile foundation piling mode It closes, realization can be facilitated by existing construction means, have the advantages that construction is simple, construction cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of single-pile foundation of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawing and by specific embodiment, and following embodiment is descriptive , it is not restrictive, this does not limit the scope of protection of the present invention.
A kind of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation, referring to Figure 1, inventive point are as follows:
Including single-pile foundation ontology, single-pile foundation ontology uses large-diameter hollow steel tube pile structure, single-pile foundation ontology 1 by The soil body revealed section 1-1 for extending into the soil body inserting paragraph 1-2 of 4 lower part of sea bed and exposing to above sea bed is constituted, and is inserted into the soil body The interface upper end of section and soil body revealed section is provided with peripheral rotary table 2, and the periphery rotary table is coaxially fixed with single-pile foundation ontology The top end diameter of connection, the periphery rotary table is greater than the outer diameter of single-pile foundation ontology.The periphery rotary table is moulding by casting Concrete frustum cone structure, stiffener 3, the lateral surface of stiffener and single-pile foundation ontology are provided in concrete rotary table Weldering connects.The stiffener is further upper layer and lower layer, two layers of stiffener along the circumferential direction radial arrangement.It is described outer The lower part outside diameter for enclosing rotary table is further 1.5-3 times of single-pile foundation ontology diameter.
The construction method of this offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation, including following construction procedure:
S1 land formation rotary table assistant reinforcement formula single-pile foundation, specific:
A, preferred selected setting diameter and the hollow steel tubular pole of setting length are as single-pile foundation ontology;
B, the position welding stiffener set on hollow steel tubular pole lateral wall;
C, the position of hollow steel tubular pole welding stiffener is placed in prefabricated rotary table molding die;
D, it is poured concrete in rotary table molding die, after concrete curing, forms peripheral rotary table;
S2 lifts by crane single-pile foundation, uses gravitational settling first, utilizes the self weight of hollow steel tubular pole and the ballast of peripheral rotary table Effect makes pile foundation lower end penetrate sea bed following depth;
S3 is then driven piles by pile driving equipment to predetermined depth, is in close contact the lower end of peripheral rotary table and sea bed, is being pacified Need to monitor the tilt angle on basis during dress closely, strict control is horizontal, and adoptable mode is preferred are as follows: in lifting pile foundation Before plinth, multiple inclinators are along the circumferential direction laid in the upper surface of peripheral rotary table, inclinator is existed by data line and setting Display equipment connection on piling construction platform.By showing that equipment can obtain the tilt condition of single-pile foundation in time, to adjust Whole piling position, will be under single-pile foundation adjustment control to horizontality.
Although disclosing the embodiment of the present invention and attached drawing for the purpose of illustration, those skilled in the art can be managed Solution: do not departing from the present invention and spirit and scope of the appended claims in, various substitutions, changes and modifications be all it is possible, Therefore, the scope of the present invention is not limited to the embodiment and attached drawing disclosure of that.

Claims (5)

1. a kind of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation, it is characterised in that: including single-pile foundation ontology, single pile Base matrix use hollow steel pipe pilework, single-pile foundation ontology by be located at lower part soil body inserting paragraph and the superposed soil body Revealed section is constituted, and the partial cross-section upper end of soil body inserting paragraph and soil body revealed section is provided with peripheral rotary table, the periphery rotary table with Single-pile foundation ontology is fixedly and coaxially connected, and the top end diameter of the periphery rotary table is greater than the outer diameter of single-pile foundation ontology;Institute State the concrete frustum cone structure that peripheral rotary table is moulding by casting, be provided with stiffener in concrete rotary table, stiffener with The lateral surface of single-pile foundation ontology, which welds, to be connected.
2. offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation according to claim 1, it is characterised in that: described to add Strong reinforcing bar is upper layer and lower layer, two layers of stiffener along the circumferential direction radial arrangement.
3. offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation according to claim 1, it is characterised in that: described outer The lower part outside diameter for enclosing rotary table is 1.5-3 times of single-pile foundation ontology diameter.
4. a kind of construction method of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation, which is characterized in that single-pile foundation is adopted With above structure, construction method are as follows:
S1 land formation rotary table assistant reinforcement formula single-pile foundation, specific:
A, preferred selected setting diameter and the hollow steel tubular pole of setting length are as single-pile foundation ontology;
B, the position welding stiffener set on hollow steel tubular pole lateral wall;
C, the position of hollow steel tubular pole welding stiffener is placed in prefabricated rotary table molding die;
D, it is poured concrete in rotary table molding die, after concrete curing, forms peripheral rotary table;
S2 lifts by crane single-pile foundation, uses gravitational settling first, is acted on using the self weight of hollow steel tubular pole and the ballast of peripheral rotary table Pile foundation lower end is set to penetrate sea bed following depth;
S3 then drives piles to predetermined depth, is in close contact the lower end of peripheral rotary table and sea bed, needs during the installation process closely The tilt angle of single-pile foundation is monitored, strict control is horizontal.
5. the construction method of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation according to claim 4, feature It is: in S2 before lifting by crane pile foundation, along the circumferential direction lays multiple inclinators in the upper surface of peripheral rotary table, inclinator is logical Data line is crossed to connect with the display equipment being arranged on piling construction platform.
CN201910633296.3A 2019-07-15 2019-07-15 A kind of offshore wind farm unit rotary table assistant reinforcement formula single-pile foundation and construction method Pending CN110397061A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110984214A (en) * 2019-12-19 2020-04-10 中国长江三峡集团有限公司 Offshore wind power single pile-wing plate-rockfill composite foundation and construction method thereof
CN111501814A (en) * 2020-03-23 2020-08-07 河北工业大学 Offshore wind turbine composite foundation and foundation reinforcement construction method
CN112813970A (en) * 2019-11-15 2021-05-18 中国石油化工集团有限公司 Method for reinforcing pile foundation by offshore inclined directional grouting

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Publication number Priority date Publication date Assignee Title
CN101545462A (en) * 2009-05-08 2009-09-30 中国海洋大学 A steel-concrete combined weight type offshore wind fan foundation structure
CN102444140A (en) * 2011-10-21 2012-05-09 天津大学 Combination base of wind power generator set foundation on sea
CN202500078U (en) * 2012-02-14 2012-10-24 长安大学 A hollow steel tube cylindrical structure based on externally-installed stiffeners and externally-wrapped concrete
CN204059342U (en) * 2014-08-13 2014-12-31 上海勘测设计研究院有限公司 Be applicable to the marine wind electric field fan single-pile foundation of deep soft layer
CN104818727A (en) * 2015-05-05 2015-08-05 福建永福工程顾问有限公司 Single pile and gravity combined offshore wind power foundation
CN204803907U (en) * 2015-04-07 2015-11-25 江苏海上龙源风力发电有限公司 Marine wind power steel constructs gravity type fan basis
KR20160143599A (en) * 2016-09-20 2016-12-14 김현기 Hybrid type concrete foundation of offshore wind turbine using composite of concrete and steel sleevee and fabrication method thereof
CN206646538U (en) * 2017-03-30 2017-11-17 福建省水利水电勘测设计院(水利部福建水利水电勘测设计研究院) Single-pile foundation for batholith sea bed soft overburden
CN108867688A (en) * 2018-07-18 2018-11-23 上海勘测设计研究院有限公司 A kind of offshore wind turbine gravity type foundation and its installation method
CN210482350U (en) * 2019-07-15 2020-05-08 河北工业大学 Auxiliary reinforced single pile foundation for circular truncated cone of offshore wind turbine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101545462A (en) * 2009-05-08 2009-09-30 中国海洋大学 A steel-concrete combined weight type offshore wind fan foundation structure
CN102444140A (en) * 2011-10-21 2012-05-09 天津大学 Combination base of wind power generator set foundation on sea
CN202500078U (en) * 2012-02-14 2012-10-24 长安大学 A hollow steel tube cylindrical structure based on externally-installed stiffeners and externally-wrapped concrete
CN204059342U (en) * 2014-08-13 2014-12-31 上海勘测设计研究院有限公司 Be applicable to the marine wind electric field fan single-pile foundation of deep soft layer
CN204803907U (en) * 2015-04-07 2015-11-25 江苏海上龙源风力发电有限公司 Marine wind power steel constructs gravity type fan basis
CN104818727A (en) * 2015-05-05 2015-08-05 福建永福工程顾问有限公司 Single pile and gravity combined offshore wind power foundation
KR20160143599A (en) * 2016-09-20 2016-12-14 김현기 Hybrid type concrete foundation of offshore wind turbine using composite of concrete and steel sleevee and fabrication method thereof
CN206646538U (en) * 2017-03-30 2017-11-17 福建省水利水电勘测设计院(水利部福建水利水电勘测设计研究院) Single-pile foundation for batholith sea bed soft overburden
CN108867688A (en) * 2018-07-18 2018-11-23 上海勘测设计研究院有限公司 A kind of offshore wind turbine gravity type foundation and its installation method
CN210482350U (en) * 2019-07-15 2020-05-08 河北工业大学 Auxiliary reinforced single pile foundation for circular truncated cone of offshore wind turbine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112813970A (en) * 2019-11-15 2021-05-18 中国石油化工集团有限公司 Method for reinforcing pile foundation by offshore inclined directional grouting
CN110984214A (en) * 2019-12-19 2020-04-10 中国长江三峡集团有限公司 Offshore wind power single pile-wing plate-rockfill composite foundation and construction method thereof
CN111501814A (en) * 2020-03-23 2020-08-07 河北工业大学 Offshore wind turbine composite foundation and foundation reinforcement construction method
CN111501814B (en) * 2020-03-23 2021-03-16 河北工业大学 Offshore wind turbine composite foundation and foundation reinforcement construction method

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