CN111058471A - Scour prevention's offshore wind turbine basis - Google Patents

Scour prevention's offshore wind turbine basis Download PDF

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Publication number
CN111058471A
CN111058471A CN201811203891.5A CN201811203891A CN111058471A CN 111058471 A CN111058471 A CN 111058471A CN 201811203891 A CN201811203891 A CN 201811203891A CN 111058471 A CN111058471 A CN 111058471A
Authority
CN
China
Prior art keywords
scouring
foundation
wind turbine
offshore wind
erosion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811203891.5A
Other languages
Chinese (zh)
Inventor
刘博�
郑荣坤
刘旭东
吴海航
杨雪雯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
Original Assignee
China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd filed Critical China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
Priority to CN201811203891.5A priority Critical patent/CN111058471A/en
Publication of CN111058471A publication Critical patent/CN111058471A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • E02D27/32Foundations for special purposes
    • E02D27/52Submerged foundations, i.e. submerged in open water
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/06Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water

Abstract

The invention relates to an anti-scouring offshore wind turbine foundation which comprises a foundation body, an anti-scouring coating layer and an anti-scouring retainer ring. The anti-scouring retainer ring is sleeved on the base body and is arranged at intervals with the anti-scouring coating layer. The anti-scouring coating is covered on the surface of the seabed, so that the seabed around the foundation body is protected. Furthermore, when water flows around the base body, the anti-scouring retainer ring can damage a turbulent flow field and reduce the shear stress of the water flow around the base body, so that the scouring capacity of the water flow is greatly weakened. On the one hand, the scouring action of the water flow on the seabed itself is weakened. On the other hand, the water flow scouring capability is weakened, so that the anti-scouring coating layer can be prevented from being rapidly scoured, the anti-scouring coating layer can be kept for a long time, and the continuous protection effect on the seabed is achieved. Therefore, the anti-scouring effect of the anti-scouring offshore wind turbine foundation is good.

Description

Scour prevention's offshore wind turbine basis
Technical Field
The invention relates to the technical field of offshore wind power, in particular to an anti-scouring offshore wind turbine foundation.
Background
In recent years, with the gradual increase of the development speed of domestic offshore wind energy resources, various forms of offshore wind turbine foundations are continuously appeared, and the offshore wind turbine foundations mainly comprise high pile cap foundations, jacket foundations, single pile foundations, barrel foundations and the like. Researches find that the periphery of a single-pile foundation and a single-bucket foundation is easy to have a relatively serious scouring phenomenon because the surface soil of the seabed is mostly loose fine sand or silt in a flow molding state and has lower strength. During the long-term service period of the wind turbine generator, the scouring phenomenon can cause the foundation of the wind turbine to be unstable, and the normal work of the wind turbine is influenced.
At present, the anti-scouring treatment is required to be carried out on the foundation of the fan during the construction of the fan. However, the existing anti-scouring scheme has the defects of unreasonable structural form, insufficient integral rigidity and the like, so that the anti-scouring effect is poor. After the fan is used for a long time, the foundation of the fan still has the unstable risk caused by excessive scouring.
Disclosure of Invention
On the basis, the offshore wind turbine foundation with a good anti-scouring effect is provided for solving the problem that the anti-scouring effect of the existing wind turbine foundation is poor.
An erosion-resistant offshore wind turbine foundation for installation on a seabed, the erosion-resistant offshore wind turbine foundation comprising:
the seabed, and a waterline is arranged in the region of the seabed;
the anti-scouring coating is arranged on the surface of the seabed in a covering mode and arranged along the circumferential direction of the foundation body; and
scour prevention rand is annular platelike structure, scour prevention rand cover is located on the basis body and be located the waterline with between the scour prevention cladding, the scour prevention rand with the surface interval on scour prevention cladding sets up.
In one embodiment, the erosion protection coating is a sand coating.
In one embodiment, the sand quilt is distributed in a circle, and the diameter of the sand quilt is more than or equal to three times of the diameter of the base body.
In one embodiment, the anti-scour collar is annular in shape.
In one embodiment, the distance between the scour prevention collar and the seabed surface is one quarter of the distance between the seabed surface and the waterline.
In one embodiment, the surface of the base body is provided with a plurality of limiting blocks along the circumference, and the anti-scouring clamping ring is abutted to the limiting blocks.
In one embodiment, the middle part of the anti-scouring clamp ring is provided with a through hole, and the diameter of the through hole is larger than that of the base body.
In one embodiment, the diameter of the base body increases in a direction from the top end to the bottom end.
In one embodiment, the anti-scouring clamp further comprises a J-shaped pipe arranged on the surface of the base body, an arc-shaped notch is formed in the anti-scouring clamp ring, and the J-shaped pipe penetrates through the arc-shaped notch.
In one embodiment, the water-level-adjustable water-level assembly further comprises a ladder stand and a steel platform arranged on the top end, wherein one end of the ladder stand is connected with the steel platform, and the other end of the ladder stand points to the water line.
According to the anti-scouring offshore wind turbine foundation, the anti-scouring coating layer is arranged on the surface of the seabed in a covering mode, and therefore the seabed around the foundation body is protected. Furthermore, when water flows around the base body, the anti-scouring retainer ring can damage a turbulent flow field and reduce the shear stress of the water flow around the base body, so that the scouring capacity of the water flow is greatly weakened. On the one hand, the scouring action of the water flow on the seabed itself is weakened. On the other hand, the water flow scouring capability is weakened, so that the anti-scouring coating layer can be prevented from being rapidly scoured, the anti-scouring coating layer can be kept for a long time, and the continuous protection effect on the seabed is achieved. Therefore, the anti-scouring effect of the anti-scouring offshore wind turbine foundation is good.
Drawings
FIG. 1 is a schematic structural view of an anti-scour offshore wind turbine foundation according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of an anti-erosion collar in the anti-erosion offshore wind turbine foundation shown in fig. 1.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an anti-erosion offshore wind turbine foundation 100 according to a preferred embodiment of the present invention includes a foundation body 110, an anti-erosion coating 120, and an anti-erosion collar 130.
The foundation body 110 is generally a concrete structure, a steel frame structure, or the like. The base body 110 is fixed to the seabed to support the whole wind turbine. The foundation body 110 may be a high pile cap foundation, a jacket foundation, a single pile foundation, a bucket foundation, and the like, according to the type of the wind turbine. The foundation body 110 in this embodiment mainly refers to a single pile foundation and a bucket foundation.
The foundation body 110 includes opposite top and bottom ends (not shown) and is buried in the seabed. The single pile foundation and the barrel type foundation are generally cylindrical and tubular. In addition, a water line (not shown) is provided in a region of the base body 110 between the top end and the bottom end.
The waterline refers to a location of the water surface when the foundation body 110 is installed on the seabed. The waterline may be an actual presence identifier or may be a virtual identifier. Thus, the water line reflects the depth of water at the installation site of the foundation body 110. For fans of different types and installation positions, the position of the waterline on the base body 110 can be adjusted accordingly.
The erosion protection coating 120 is coated on the surface of the seabed and is disposed along the circumferential direction of the foundation body 110. The erosion protection coating 120 mainly protects the seabed around the foundation body 100 from being washed by water flow to cause the foundation body 100 to be unstable. Specifically, the erosion protection coating 120 may be a riprap, sand, or geotextile structure.
Referring also to fig. 2, the anti-erosion retainer 130 is an annular plate-shaped structure. The anti-erosion retainer 130 is generally a metal structure, and can be pre-formed. The anti-erosion retainer 130 is disposed on the base body 100 and located between the water line and the anti-erosion coating 120. Also, an anti-erosion collar 130 is spaced from the surface of the anti-erosion coating 120.
When water flows around the foundation body 100, the anti-scouring retainer ring 130 can destroy the turbulent flow field and reduce the shear stress of the water flow around the foundation body, thereby greatly weakening the scouring capability of the water flow. Therefore, the seabed around the foundation body 110 is not easily washed. Furthermore, the erosion-resistant coating 120 may also remain for a longer period of time due to the reduced water scour, thereby providing a long-lasting protection to the seabed.
In this embodiment, the erosion protection coating 120 is a sand coating. Due to the turbulent flow of the anti-erosion retainer 130, the erosion capacity of the water flow is reduced, and the impact on the anti-erosion outlet 120 is reduced. Accordingly, a stone-throwing operation may not be required in molding the erosion prevention coating 120, thereby reducing costs and facilitating later maintenance.
Further, in the present embodiment, the sand quilt is distributed in a circular shape, and the diameter of the sand quilt is greater than or equal to three times the diameter of the base body 110.
The round sand quilt has smooth boundary, so that local part can be prevented from being excessively washed. And through measurement and calculation, when the diameter of the sand quilt is more than or equal to three times of the diameter of the base body 110, the sand prevention effect of the sand quilt is better. Here, the diameter of the base body 110 at this time refers to the diameter of the area of the base body 110 surrounded by the sand.
Specifically, in this embodiment, the anti-erosion collar 130 is annular in shape. The circular anti-scouring collar 130 can achieve a balanced turbulence effect from all directions, thereby facilitating the promotion of the anti-scouring effect. It is understood that in other embodiments, the anti-scour collar 130 may be quadrilateral, hexagonal, etc.
In this embodiment, the distance between the scour prevention collar 130 and the seabed surface is one quarter of the distance between the seabed surface and the waterline.
Specifically, the distance between the seabed surface and the waterline is the water depth of the position of the foundation body 110. The diameter of the anti-scour collar 130 is typically three times the diameter of the base body 110. Thus, the projection of the anti-scour collar 130 onto the seabed substantially overlaps the anti-scour coating 120. The thickness of the anti-erosion collar 130 is adjustable, typically between 200 mm and 400 mm. According to measurement and calculation, when the distance between the anti-scouring retainer ring 130 and the surface of the seabed is one fourth of the water depth, the turbulent flow effect of the anti-scouring retainer ring 130 is optimal.
It should be noted that the distance between the scour collar 130 and the surface of the seabed is approximately one-fourth of the water depth, as a result of being influenced by tides, waves and the like. Furthermore, in other embodiments, the distance between the scour collar 130 and the surface of the seabed is not limited to one-quarter of the water depth.
Referring to fig. 1 again, in the present embodiment, a plurality of limiting blocks 111 are disposed on the surface of the base body 110 along the circumferential direction, and the anti-erosion retainer ring 130 abuts against the limiting blocks 111.
Specifically, the limiting block 111 may be a rectangular parallelepiped structure, and is generally welded to the surface of the base body 110. The plurality of stoppers 111 may be disposed at equal intervals or at unequal intervals. In this embodiment, the number of the limiting holes 111 is 8, and a limiting block 111 is disposed at an angle of 45 degrees.
Further, the center of the anti-erosion collar 130 has a through hole 131, and the base body 110 passes through the through hole 131. After the base body 110 is fixed, the pre-formed anti-scouring retainer ring 130 can be lifted and sleeved on the top end of the base body 110, and then the anti-scouring retainer ring 130 slides to abut against the limiting block 111. Therefore, the convenience of assembling the wind driven generator can be improved.
Further, in the present embodiment, the diameter of the through hole 131 is larger than that of the base body 110. Specifically, the diameter of the through hole 131 is generally 200 mm larger than the diameter of the base body 110. Therefore, when hoisting, the anti-scouring retainer ring 130 can be ensured to be smoothly lowered to the position of the limiting block 111.
Further, in the present embodiment, the diameter of the base body 110 is sequentially increased in a direction along the top end to the bottom end.
Therefore, the base body 110 is substantially tapered and has a structure with a thin upper part and a thick lower part. Therefore, the through hole 131 can be aligned with the top end of the base body 110, thereby facilitating the lifting operation of the anti-erosion retainer ring 130.
In this embodiment, the erosion resistant offshore wind turbine foundation 100 further comprises a J-shaped pipe 140 disposed on the foundation body surface 110. The anti-scouring retainer ring 130 is provided with an arc-shaped notch 133, and the J-shaped pipe 140 is arranged in the arc-shaped notch 133 in a penetrating way.
Specifically, the J-shaped tube 140 is generally a steel tube for passing a cable therethrough and protecting the cable. The arc-shaped notch 133 can form a clearance for the J-shaped tube 140, so as to prevent the J-shaped tube 140 from protruding out of the edge of the anti-erosion retainer 130 and causing adverse effects on the turbulent flow function of the anti-erosion retainer 130. The number of the J-shaped tubes 140 is two, and the number of the arc notches 133 is two accordingly.
In this embodiment, the erosion-resistant offshore wind turbine foundation 100 further includes a steel platform 150 and a ladder 160. Steel platform 150 sets up in the top of basic body 110, and the one end and the steel platform 150 of cat ladder 160 are connected, the directional waterline of the other end.
The steel platform 150 is load bearing and may have a variety of electrical equipment disposed thereon and provide a work site for an operator who may reach the steel platform 150 by climbing the ladder 160.
The anti-erosion offshore wind turbine foundation 100 and the anti-erosion coating layer 120 are coated on the surface of the seabed, so that the seabed around the foundation body 110 is protected. Further, when water flows around the base body 110, the anti-scouring retainer ring 130 can destroy the turbulent flow field and reduce the shear stress of the water flow around the base body 110, thereby greatly weakening the scouring capability of the water flow. On the one hand, the scouring action of the water flow on the seabed itself is weakened. On the other hand, the reduction of the water flow scouring capability can also prevent the anti-scouring coating layer 120 from being rapidly scoured, so that the anti-scouring coating layer 120 is kept for a long time, and the continuous protection effect on the seabed is achieved. Therefore, the erosion prevention effect of the erosion prevention offshore wind turbine foundation 100 is good.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides an offshore wind turbine foundation of scour prevention, installs in the seabed which characterized in that, offshore wind turbine foundation of scour prevention includes:
the seabed, and a waterline is arranged in the region of the seabed;
the anti-scouring coating is arranged on the surface of the seabed in a covering mode and arranged along the circumferential direction of the foundation body; and
scour prevention rand is annular platelike structure, scour prevention rand cover is located on the basis body and be located the waterline with between the scour prevention cladding, the scour prevention rand with the surface interval on scour prevention cladding sets up.
2. An erosion resistant offshore wind turbine foundation according to claim 1, wherein the erosion resistant coating is a sand quilt.
3. An erosion resistant offshore wind turbine foundation according to claim 2, wherein the sand quilt is distributed in a circle and has a diameter greater than or equal to three times the diameter of the foundation body.
4. An erosion prevention offshore wind turbine foundation according to claim 1, wherein the erosion prevention collar is ring shaped.
5. An erosion prevention offshore wind turbine foundation according to claim 1, wherein the distance between the erosion prevention collar and the seabed surface is one quarter of the distance between the seabed surface and the waterline.
6. The offshore wind turbine foundation of claim 1, wherein the surface of the foundation body is provided with a plurality of limiting blocks along the circumferential direction, and the anti-erosion retainer ring abuts against the limiting blocks.
7. An erosion prevention offshore wind turbine foundation according to claim 6 wherein the erosion prevention collar has a through hole in the middle and the diameter of the through hole is larger than the diameter of the foundation body.
8. An erosion resistant offshore wind turbine foundation according to claim 6, wherein the diameter of the foundation body increases in order in a direction from the top end to the bottom end.
9. The anti-scouring offshore wind turbine foundation of claim 1, further comprising a J-shaped pipe arranged on the surface of the foundation body, wherein an arc-shaped notch is formed in the anti-scouring clamping ring, and the J-shaped pipe penetrates through the arc-shaped notch.
10. The erosion-preventing offshore wind turbine foundation of claim 1, further comprising a ladder and a steel platform arranged on the top end, wherein one end of the ladder is connected with the steel platform, and the other end of the ladder points to the waterline.
CN201811203891.5A 2018-10-16 2018-10-16 Scour prevention's offshore wind turbine basis Pending CN111058471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811203891.5A CN111058471A (en) 2018-10-16 2018-10-16 Scour prevention's offshore wind turbine basis

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Application Number Priority Date Filing Date Title
CN201811203891.5A CN111058471A (en) 2018-10-16 2018-10-16 Scour prevention's offshore wind turbine basis

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CN111058471A true CN111058471A (en) 2020-04-24

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101638900A (en) * 2009-07-15 2010-02-03 浙江海洋学院 Erosion protection device of offshore pile foundation
KR20130090070A (en) * 2012-02-03 2013-08-13 주식회사신화기공 Reinforcing structure of hydraulic structures
CN103243639A (en) * 2013-05-13 2013-08-14 牟献友 Annular-wing pier capable of preventing scouring
KR20160057198A (en) * 2014-11-13 2016-05-23 목포해양대학교 산학협력단 Apparatus and Method of Scouring of Foundation
CN206706811U (en) * 2017-03-06 2017-12-05 中国电建集团华东勘测设计研究院有限公司 A kind of offshore wind turbine single-pile foundation
CN108104065A (en) * 2017-12-27 2018-06-01 浙江大学 A kind of offshore wind turbine single-pile foundation protective device for weakening current scour effect
CN108239971A (en) * 2016-12-26 2018-07-03 大连理工大学 A kind of single pile formula offshore wind turbine platform and its construction method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101638900A (en) * 2009-07-15 2010-02-03 浙江海洋学院 Erosion protection device of offshore pile foundation
KR20130090070A (en) * 2012-02-03 2013-08-13 주식회사신화기공 Reinforcing structure of hydraulic structures
CN103243639A (en) * 2013-05-13 2013-08-14 牟献友 Annular-wing pier capable of preventing scouring
KR20160057198A (en) * 2014-11-13 2016-05-23 목포해양대학교 산학협력단 Apparatus and Method of Scouring of Foundation
CN108239971A (en) * 2016-12-26 2018-07-03 大连理工大学 A kind of single pile formula offshore wind turbine platform and its construction method
CN206706811U (en) * 2017-03-06 2017-12-05 中国电建集团华东勘测设计研究院有限公司 A kind of offshore wind turbine single-pile foundation
CN108104065A (en) * 2017-12-27 2018-06-01 浙江大学 A kind of offshore wind turbine single-pile foundation protective device for weakening current scour effect

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
任致贤等: "多个环翼式桥墩冲刷影响研究 ", 《水力发电》 *

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