CN112177031B - Offshore wind turbine single pile foundation with radiation rib plates and anti-scouring cover - Google Patents
Offshore wind turbine single pile foundation with radiation rib plates and anti-scouring cover Download PDFInfo
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- CN112177031B CN112177031B CN202011026802.1A CN202011026802A CN112177031B CN 112177031 B CN112177031 B CN 112177031B CN 202011026802 A CN202011026802 A CN 202011026802A CN 112177031 B CN112177031 B CN 112177031B
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- rib plate
- cover body
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- tubular pile
- conical cover
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective 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 provides an offshore wind turbine single pile foundation with a radiation rib plate and an anti-scouring cover, which comprises: the tubular pile is a hollow cylinder, the outer side wall of the tubular pile is provided with a plurality of rib plates, and the plurality of rib plates are radially distributed outwards along the outer side wall of the tubular pile; the cylindrical component is sleeved on the outer side of the rib plate, the cylindrical component is connected with the tubular pile through the rib plate, the inner wall of the cylindrical component is connected with the upper edge of the rib plate, and the integrity of the single pile foundation is enhanced; the conical cover body is sleeved on the tubular pile and positioned above the cylindrical component, the large end of the conical cover body is contacted with the cylindrical component, the outer diameter of the large end of the conical cover body is matched with that of the cylindrical component, and the inner diameter of the small end of the conical cover body is matched with that of the tubular pile. The invention improves the bearing capacity and the anti-sliding and anti-overturning stability of the single pile foundation, and simultaneously can avoid scouring by arranging the tapered cover body, thereby increasing the stability and the anti-scouring capability of the pile foundation.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to an offshore wind turbine single-pile foundation with radiation rib plates and an anti-scouring cover.
Background
Energy is the basis of modern society and economic development, however, with the increase of population and the increasing development of social economy, the consumption of energy is also rapidly increased, and the energy crisis is gradually appeared. The development of clean and efficient renewable energy is a strategic target of vigorous development of all countries in the world, and wind energy is one of the important new energy sources developed by all countries as renewable energy. The offshore wind power generation is one of wind power utilization, is developed rapidly in recent years, has most advantages of onshore wind power generation, and has the advantages of large power generation amount, less use limitation, no land occupation and the like.
In the event of a claim for an offshore wind power project, the problems associated with a single pile foundation account for 35%, most of which occur in deep sea areas. This is due in part to the fact that developers are overly confident in the construction process, and still employ a basic monopile foundation for cost reduction, regardless of reliability and applicability.
The major diameter single pile basis is the mainstream of offshore wind power basis, and construction convenience and economic benefits are better, but the single pile basis is generally suitable for the sea area that the depth of water is less than 25m, and along with the development gradually of coastal waters wind power resource, deep water sea area wind power development is tendency greatly, and the main following factor that exists that restricts the application of single pile basis to deep water sea area: the single pile foundation needs to have larger bearing capacity and anti-skid and anti-overturning stability; when the construction ship is used for pile sinking construction, the verticality of a single pile is difficult to control due to the influence of waves, sea wind and the like; the soil around the pile is seriously washed by the ocean, so that the stability is reduced and the inclination of the pile is promoted to cause accidents.
In the prior art, many people have improved the traditional single pile, for example, the chinese patent with application No. 201910633302.5 discloses an offshore wind turbine generator reinforced composite single pile foundation and a construction method, and the chinese patent with application No. 201810001208.3 discloses an offshore wind turbine composite single pile foundation and a construction method. The patent technologies make some improvements on the single pile foundation, which can bring certain effects, but the overall bearing capacity, the stability of skid resistance and overturn resistance, the scour resistance and other performances need to be further improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an offshore wind turbine single-pile foundation with a radiation rib plate and an anti-scouring cover.
In order to achieve the above object, the present invention provides an offshore wind turbine single pile foundation with radiation rib plates and an erosion shield, comprising:
the tubular pile is a steel hollow cylinder, a plurality of rib plates are arranged on the outer side wall of the steel hollow cylinder, and the plurality of rib plates are radially distributed outwards along the outer side wall of the steel hollow cylinder;
the tubular pile comprises a tubular component, a rib plate and a tubular pile, wherein the tubular component is sleeved on the outer side of the rib plate and connected with the tubular pile through the rib plate, the inner wall of the tubular component is connected with the upper edge of the rib plate, and the length of the tubular component is the same as that of the upper edge of the rib plate;
a cone cover body for dispersion water impact, the cone cover body cover is located on the tubular pile, and is located the top of drum part, the main aspects of the cone cover body with drum part contacts, just the main aspects's of the cone cover body external diameter with the external diameter phase-match of drum part, the cone cover body the tip the internal diameter with the external diameter phase-match of tubular pile.
Preferably, through holes are formed in the rib plate and the conical cover body, so that the rib plate and the conical cover body form a communicating vessel.
Preferably, the rib plate is provided with at least one first through hole, and the first through hole penetrates through the thickness direction of the rib plate;
the conical cover body is at least provided with a second through hole, and the second through hole penetrates through the thickness direction of the conical cover body;
the rib plate and the conical cover body form a communicating vessel structure convenient for driving the pile body into the seabed through the first through hole and the second through hole.
Preferably, when the rib plate is provided with a plurality of first through holes, the plurality of first through holes are uniformly distributed along the length direction of the rib plate.
Preferably, when the conical cover body is provided with a plurality of second through holes, the second through holes are uniformly distributed along the axial direction of the conical cover body.
Preferably, the floor is the right trapezoid floor, wherein, the lower base of right trapezoid floor with the lateral wall of tubular pile is connected, the acute angle end of right trapezoid floor sets up downwards, and is a plurality of the right trapezoid floor is followed the lateral wall of tubular pile outwards is radial distribution, and is a plurality of the acute angle end of right trapezoid floor forms and is located the toper portion of the lateral wall of tubular pile.
Preferably, a cavity is formed among the conical cover body, the cylindrical part and the tubular pile, the right-angle end of the right-angle trapezoidal rib plate is located in the cavity, and the acute-angle end of the right-angle trapezoidal rib plate is located below the cavity.
Preferably, the size of the acute angle end of the right-angle trapezoidal rib plate is adjusted according to the penetration resistance of the pile body driven into the seabed.
Preferably, a plurality of right trapezoid floor centers on the lower extreme circumference of tubular pile evenly sets up the lower extreme of tubular pile forms the toper portion.
Preferably, the conical cover body, the cylindrical part and the tubular pile are connected in a smooth transition mode.
Compared with the prior art, the invention has at least one of the following beneficial effects:
the single-pile foundation is simple in structure and suitable for deep sea areas; the protective cover body is formed by arranging the conical cover body (the protective cover body is positioned above a seabed), so that water flow impact can be dispersed, scouring can be avoided, the integrity of a pile foundation can be increased, and the condition that stability is reduced due to scouring to cause accidents due to inclination of the pile can be effectively avoided; the rib plates distributed in a radial manner are arranged on the periphery of the pipe pile, so that the horizontal bearing capacity of the steel pile is improved, the displacement and bending moment of a pile body are reduced, the verticality of a single pile foundation during construction is ensured, the bearing capacity and the anti-slip and anti-overturning stability of the single pile foundation are improved, and the problem that the verticality of the single pile is difficult to control due to the influence of waves, sea wind and the like when a construction ship is driven to sink the pile is solved; and the cylindrical part is sleeved on the outer wall of the rib plate, so that the integrity of the rib plate is increased, and the cylindrical part is used as the skirt edge of the whole single pile and is half exposed outside the seabed, so that water flow impact can be dispersed, scouring can be avoided, and the stability and the scouring resistance are improved. The structure aims at the complex marine environment of the offshore wind turbine, has multiple effects, has the characteristics of low construction difficulty and strong geological condition adaptability, reduces the possibility of accidents caused by the influence of the complex marine environments such as waves, sea wind and the like on the offshore wind turbine, and has wide application prospect in the marine wind turbine.
According to the structure of the single-pile foundation, the rib plates and the protective cover are provided with the through holes to form the communicating vessel structure, so that the steel piles can be conveniently driven into a seabed.
According to the structure of the single-pile foundation, the rib plate is designed into a right-angle trapezoidal rib plate structure, the acute-angle end of the right-angle trapezoidal rib plate faces downwards, the lower end of the tubular pile forms the conical part, the pile-soil contact pressure is increased, and accordingly the penetration resistance is reduced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a single-pile foundation of an offshore wind turbine with radial ribs and an erosion shield according to a preferred embodiment of the present invention;
FIG. 2 is a bottom perspective view of FIG. 1;
FIG. 3 is a schematic view of a construction state of a single pile foundation of an offshore wind turbine with radial ribs and an erosion shield according to a preferred embodiment of the present invention;
the scores in the figure are indicated as: 1 is a tubular pile, 2 is a ribbed plate, 3 is a conical cover body, 4 is a cylindrical part, 5 is a first through hole, 6 is a second through hole, and 7 is a seabed.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Referring to fig. 1, a schematic structural view of a single pile foundation of an offshore wind turbine with radial ribs and an anti-erosion shield according to a preferred embodiment of the present invention is shown in fig. 2, which includes a tubular pile 1, and the tubular pile 1 is provided with a plurality of ribs 2, a cylindrical member 4 and a conical cover 3. The tubular pile 1 is a steel hollow cylinder, and the diameter and the wall thickness of the steel hollow cylinder can be selected according to actual working conditions. Accordingly, the rib plate 2 may be a steel plate.
A plurality of floor 2 set up on tubular pile 1's lateral wall to outwards be radial distribution along tubular pile 1's lateral wall. Preferably, the bottom edge of each rib plate 2 is welded to the outer side wall of the tubular pile 1, and the other end of the rib plate 2 is a free end and extends outwards. The ribbed slab 2 is arranged perpendicular to the tubular pile 1. Through set up floor 2 on tubular pile 1's lateral wall, improve the horizontal bearing capacity of steel pile, can reduce the displacement and the moment of flexure of pile body, the single pile straightness that hangs down when ensureing the construction has improved single pile basis bearing capacity and anti-skidding antidumping stability.
The cylindrical component 4 is sleeved on the outer side of the rib plate 2, the cylindrical component 4 is connected with the tubular pile 1 through the rib plate 2, and the inner wall of the cylindrical component 4 is connected with the upper edge of the rib plate 2. The cylindrical part 4 is sleeved on the outer wall of the rib plate 2, integrity of the rib plate 2 is improved, the cylindrical part 4 is used as the skirt edge of the whole single pile and is half exposed outside the seabed, water flow impact can be dispersed, scouring is avoided, and stability and anti-scouring capability are improved.
The conical cover body 3 is sleeved on the tubular pile and is positioned above the cylindrical component 4, the large end of the conical cover body 3 is contacted with the cylindrical component 4, the outer diameter of the large end of the conical cover body 3 is matched with that of the cylindrical component 4, and the inner diameter of the small end of the conical cover body 3 is matched with that of the tubular pile 1, so that the small end of the conical cover body 3 is tightly matched with the tubular pile 1. The conical cover body 3 is used for dispersing water flow impact and plays a role in protection. The height of the conical cover body 3 extending along the tubular pile 1 is generally less than the height of the cylindrical part 4 extending along the tubular pile 1. The conical cover body 3 can be formed into a conical structure by a steel plate around the circumference of the tubular pile 1, and the upper part of the seabed is wrapped by the steel plate to be welded and sealed to form a protective cover structure. Set up the toper cover body and form the protecting shield body in the top of floor 2 (be located the seabed top promptly), can disperse water impact, avoid scouring, increase the wholeness of pile foundation, solved the pile soil body and washed seriously by the ocean, can reduce stability and impel the problem that the stake slope takes place the accident. Preferably, the circular open end of the conical cover 3 and the outer side wall of the tubular pile 1 are integrally formed, and the bottom of the conical cover 3 and the circumferential surface of the upper end of the cylindrical member 4 are integrally formed. The conical cover 3 may be made of steel.
In the above embodiment, the inner wall of the cylindrical member 4 is integrally formed with the upper edge of the rib 2; the bottom edge of the rib plate 2 and the outer side wall of the tubular pile 1 can also be integrally formed. During specific construction, the cylindrical part 4 is half exposed out of the seabed, and the sandstone is laid, so that the stability of the sandstone is improved. The cylinder member 4 may be made of a steel material.
The structure aims at the complex marine environment of the offshore wind turbine, has multiple effects and has wide application prospect in marine wind power. In the specific implementation, four or eight ribs 2 can be provided, and other numbers can be adopted.
In other partially preferred embodiments, through holes are formed in the rib plate 2 and the conical cover 3, so that the rib plate 2 and the conical cover 3 form a communicating vessel, and steel piles can be conveniently driven into the seabed. At least one first through hole 5 is provided in the rib plate 2, and the first through hole 5 penetrates the thickness direction of the rib plate 2. The conical cover body 3 is provided with at least one second through hole 6, and the second through hole 6 penetrates through the thickness direction of the conical cover body 3. As a preferred embodiment, referring to fig. 1 and 2, when the rib 2 is provided with a plurality of first through holes 5, the plurality of first through holes 5 are uniformly distributed along the longitudinal direction of the rib 2. When the plurality of second through holes 6 are formed in the conical cover body 3, the plurality of second through holes 6 are uniformly distributed along the axial direction of the conical cover body 3. The volume flow of the seawater is increased by additionally arranging the first through holes 5 and the second through holes 6. The second through hole 6 may have the same or different diameter from the first through hole 5. In the process of sinking and driving the single pile foundation into the seabed, seawater can be communicated through the first through hole 5 and the second through hole 6, so that the marine scouring of soil bodies around the pile is reduced, the stability is improved, and the inclination of the pile is promoted to cause accidents.
In other parts preferred embodiment, floor 2 is the right trapezoid floor, wherein, the lower base of right trapezoid floor is connected with tubular pile 1's lateral wall, can adopt the welding, the acute angle end of right trapezoid floor sets up downwards, a plurality of right trapezoid floors outwards are radial distribution along tubular pile 1's lateral wall, a plurality of right trapezoid floors evenly set up around tubular pile 1's lower extreme circumference, the acute angle end of a plurality of right trapezoid floors forms the toper portion that is located tubular pile 1's lateral wall, form the toper portion at tubular pile 1's lower extreme. A cavity is formed among the conical cover body 3, the cylindrical part 4 and the tubular pile 1, the right-angle end of the right-angle trapezoidal rib plate is positioned in the cavity, and the acute-angle end of the right-angle trapezoidal rib plate is positioned below the cavity. The contact pressure of the pile soil is increased, so that the penetration resistance is reduced, and the downward driving is facilitated in the construction process. Preferably, the acute angle end of the right-angle trapezoidal rib plate is adjusted according to the penetration resistance of the pile body into the seabed.
In other preferred embodiments, the height of the right-angle trapezoidal rib is less than the height of the tubular pile 1, and can be adjusted according to practical situations, for example, the height (i.e. the length of the lower bottom) of the right-angle trapezoidal rib occupies 1/4-1/2 of the height of the tubular pile 1.
In the other preferred embodiments, the right-angle end of the right-angle trapezoidal rib plate is connected with the tubular pile 1, and the upper ends of the right-angle trapezoidal rib plate and the cylindrical component 4 are flush; the size of the acute angle end of the right-angle trapezoidal rib plate is adjusted according to the penetration resistance of the pile body into the seabed, generally, the smaller the acute angle is, the more favorable the penetration resistance is, but the smaller the acute angle is, the stability is influenced to a certain extent.
The offshore wind turbine single pile foundation with the radiation rib plates and the anti-scouring cover adopts the following construction steps:
prefabricating a rib plate, a tubular pile, a cylindrical part and a conical cover body on land; and punching through holes on the rib plate and the conical cover body, and welding the radial rib plate, the tubular pile and the cylindrical part into an integrated structure.
Lifting the integrated structure, inserting the lower end of the integrated structure into the deep sea area below the seabed 7 to a certain depth, specifically inserting the rib plate 2 into the seabed 7, as shown in fig. 3, and exposing the cylindrical member to the surface of the seabed.
Then, the impact protection weight is thrown and filled to the periphery of the integral structure cylinder component and the inside of the cylinder component, and the cylinder component is filled.
And binding a heavy object on the conical cover body, lifting the conical cover body, penetrating the tubular pile, enabling the conical cover body to freely fall to the bottom end to be in contact with the cylindrical component, and completing the installation of the single-pile foundation.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (4)
1. The utility model provides a take offshore wind turbine single pile basis of radiation floor and scour prevention cover which characterized in that includes:
the tubular pile is a steel hollow cylinder, a plurality of rib plates are arranged on the outer side wall of the steel hollow cylinder, and the plurality of rib plates are radially distributed outwards along the outer side wall of the steel hollow cylinder;
the tubular pile comprises a tubular component, a rib plate and a tubular pile, wherein the tubular component is sleeved on the outer side of the rib plate and connected with the tubular pile through the rib plate, the inner wall of the tubular component is connected with the upper edge of the rib plate, and the length of the tubular component is the same as that of the upper edge of the rib plate;
the conical cover body is used for dispersing water flow impact, the conical cover body is sleeved on the tubular pile and is positioned above the cylindrical component, the large end of the conical cover body is contacted with the cylindrical component, the outer diameter of the large end of the conical cover body is matched with that of the cylindrical component, and the inner diameter of the small end of the conical cover body is matched with that of the tubular pile;
through holes are formed in the rib plate and the conical cover body, so that the rib plate and the conical cover body form a communicating vessel;
the rib plate is provided with a plurality of first through holes which penetrate through the thickness direction of the rib plate; a plurality of second through holes are formed in the conical cover body, and the second through holes penetrate through the conical cover body in the thickness direction; the rib plate and the conical cover body form a communicating vessel structure which is convenient for the pile body to be driven into the seabed through the first through hole and the second through hole; the first through holes are uniformly distributed along the length direction of the rib plate; the second through holes are uniformly distributed along the axial direction of the conical cover body;
the rib plate is a right-angled trapezoid rib plate, wherein the lower bottom edge of the right-angled trapezoid rib plate is connected with the outer side wall of the tubular pile, the acute-angle end of the right-angled trapezoid rib plate faces downwards, a plurality of right-angled trapezoid rib plates are distributed outwards in a radial shape along the outer side wall of the tubular pile, and the acute-angle ends of the right-angled trapezoid rib plates form a conical part located on the outer side wall of the tubular pile;
the conical cover body, the cylinder part and a cavity is formed between the tubular piles, the right-angle end of the right-angle trapezoidal rib plate is located in the cavity, and the acute-angle end of the right-angle trapezoidal rib plate is located below the cavity.
2. The offshore wind turbine monopile foundation with the radial ribs and the erosion shield as claimed in claim 1, wherein the acute angle end of the right-angled trapezoidal rib is adjusted according to the penetration resistance of the pile body into the seabed.
3. The offshore wind turbine single pile foundation with the radial rib plates and the anti-scouring cover according to claim 1, wherein a plurality of right-angled trapezoidal rib plates are evenly arranged around the circumference of the lower end of the tubular pile, and the conical portion is formed at the lower end of the tubular pile.
4. The offshore wind turbine single pile foundation with the radial ribs and the anti-scouring cover according to any one of claims 1 to 3, wherein the connection among the conical cover body, the cylindrical part and the tubular pile is in smooth transition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011026802.1A CN112177031B (en) | 2020-09-25 | 2020-09-25 | Offshore wind turbine single pile foundation with radiation rib plates and anti-scouring cover |
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| CN202011026802.1A CN112177031B (en) | 2020-09-25 | 2020-09-25 | Offshore wind turbine single pile foundation with radiation rib plates and anti-scouring cover |
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| CN112177031A CN112177031A (en) | 2021-01-05 |
| CN112177031B true CN112177031B (en) | 2021-10-19 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112854313A (en) * | 2021-01-15 | 2021-05-28 | 天津水运工程勘察设计院 | Assembled offshore wind power pile foundation scouring protection device and installation method thereof |
| CN112922015A (en) * | 2021-01-22 | 2021-06-08 | 上海电气风电集团股份有限公司 | Offshore wind turbine single pile foundation and wind turbine |
| CN113356811A (en) * | 2021-06-09 | 2021-09-07 | 门万龙 | Oil well is with joining in marriage notes ware in pit |
| CN113718840A (en) * | 2021-09-16 | 2021-11-30 | 中国华能集团清洁能源技术研究院有限公司 | Offshore wind power multi-pile foundation |
| CN113718861A (en) * | 2021-09-16 | 2021-11-30 | 中国华能集团清洁能源技术研究院有限公司 | Offshore wind power anti-scouring composite device |
| CN113718835A (en) * | 2021-09-16 | 2021-11-30 | 中国华能集团清洁能源技术研究院有限公司 | Marine wind power basis scour prevention device |
| CN113789817B (en) * | 2021-11-16 | 2022-02-08 | 中国海洋大学 | Vortex-type maritime work foundation comprehensive scouring protection device based on multistage vortex breaking device |
| CN114457773B (en) * | 2022-01-21 | 2023-11-14 | 西南石油大学 | Novel jacket platform suitable for offshore oil and gas exploitation |
| CN115404918B (en) * | 2022-08-08 | 2023-06-06 | 江苏科技大学 | Anti-scouring and levelness adjusting device for offshore wind power negative pressure barrel and operation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203487564U (en) * | 2013-09-30 | 2014-03-19 | 山东电力工程咨询院有限公司 | Anti-flushing device of offshore wind power base structure |
| 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 |
| CN208219598U (en) * | 2018-04-10 | 2018-12-11 | 王世加 | A kind of assembled offshore pile scour protection device |
| JP6905495B2 (en) * | 2018-09-03 | 2021-07-21 | 東電設計株式会社 | Pile foundation and construction method of pile foundation |
| 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 |
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