CN216041358U - Anti-scouring structure for single pile foundation of offshore wind turbine generator system - Google Patents
Anti-scouring structure for single pile foundation of offshore wind turbine generator system Download PDFInfo
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- CN216041358U CN216041358U CN202120538711.XU CN202120538711U CN216041358U CN 216041358 U CN216041358 U CN 216041358U CN 202120538711 U CN202120538711 U CN 202120538711U CN 216041358 U CN216041358 U CN 216041358U
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Abstract
The utility model discloses an anti-scouring structure for a single pile foundation of an offshore wind turbine, and relates to the field of scouring protection of offshore wind turbine foundations. The structure comprises a single-pile foundation, integrated auxiliary components and curing piles annularly arranged around the single-pile foundation, wherein gaps are formed between the single-pile foundation and the curing piles; and arranging a plurality of shear keys on the outer wall of the single-pile foundation in the height range of the curing pile close to the single-pile foundation, densely filling a curing agent in the gap to form a curing gap, and mutually acting between the curing gap and the shear keys to strengthen the connection between the single-pile foundation and the curing gap. The utility model is suitable for scouring protection of offshore wind power single-pile foundations, has the characteristics of convenient construction, good scouring prevention effect and the like, ensures the safety of the single-pile foundations, and improves the economic benefit and the social benefit of engineering.
Description
Technical Field
The utility model relates to the technical field of offshore wind power engineering development, in particular to an anti-scouring structure of a single pile foundation of an offshore wind power generation unit.
Background
Offshore wind power is a green and clean renewable energy source and has become an important component of the sustainable development strategy of many countries. The importance of an offshore wind turbine foundation as a structure for supporting the entire wind turbine is self-evident. Common foundation forms include single pile foundation, jacket foundation, high pile cap foundation and various novel foundation forms. The single-pile foundation has the advantages of simple manufacture, clear stress, convenient and quick construction, lower manufacturing cost and the like, and is widely applied to various offshore wind power projects.
Due to the fact that the environment of offshore wind power is severe, the wind turbine foundation is subjected to the action of waves and tidal currents in a complex sea state environment for a long time, soil around the foundation is eroded continuously to generate scouring, and particularly in strong-current areas such as river mouths or tidal channels, the scouring phenomenon is obvious. Because the diameter of the single-pile foundation is larger, the single-pile foundation has large disturbance to water flow, and the scouring range and depth around the single-pile foundation are larger than those of other foundation types. And the resistance attenuation of the offshore wind turbine foundation can be further caused by the reduction of the soil body strength caused by the scouring of the seabed around the single pile foundation, and the operation safety of the wind turbine is reduced. The instability of the wind turbine foundation can not only cause great economic loss, but also cause serious social influence.
At present, the common single-pile foundation scour prevention is provided with scour prevention schemes such as stone throwing and sand quilt. Although the stone throwing scheme is simple in construction, a sinking path cannot be controlled during stone throwing, and the anti-corrosion coating of the fan foundation is easy to damage due to impact, so that the service life of a pile foundation is influenced; the geotextile for manufacturing the sand bag is easy to age to cause the damage of the sand quilt, so that the sand is lost, and the single-pile foundation cannot be effectively protected. Therefore, the research on the scouring protection measures of the single-pile foundation has obvious economic and social benefits.
Based on the situation, the utility model provides an anti-scouring structure of a single pile foundation of an offshore wind turbine generator system, which can effectively solve the problems.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: aiming at the problems in the prior art, the utility model aims to provide an anti-scouring structure for a single-pile foundation of an offshore wind power generation unit, which has the characteristics of convenience in construction, good anti-scouring effect and the like and is suitable for scouring protection of the single-pile foundation of offshore wind power generation.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model provides an anti-scouring structure of a single-pile foundation of an offshore wind turbine, which comprises a single-pile foundation, integrated auxiliary components and curing piles annularly arranged around the single-pile foundation, wherein a gap is formed between the single-pile foundation and the curing piles; and arranging a plurality of shear keys on the outer wall of the single-pile foundation in the height range of the curing pile close to the single-pile foundation, densely filling a curing agent in the gap to form a curing gap, and mutually acting between the curing gap and the shear keys to strengthen the connection between the single-pile foundation and the curing gap.
The utility model innovatively adopts an anti-scouring mode of combining the curing piles and the curing seams, leads the cable to the fan single-pile foundation from the upper part of the curing piles, arranges the bending limiter on the cable and protects the cable by the protective sand, and integrally realizes scouring protection of the offshore wind power single-pile foundation by the curing piles and the curing seams, thereby being particularly suitable for foundation protection of a muddy field.
The single-pile foundation main body structure is used for supporting the wind turbine generator and is connected with a flange at the bottom of a tower barrel of the wind turbine generator through a pile top flange and a bolt to form a whole. The single-pile foundation is erected on the seabed, and the foundation is embedded into seabed soil to provide bearing capacity for the integral structure. The integrated auxiliary component is arranged on the single-pile foundation, is an integral structure including an outer platform structure, a ship berthing structure, a ladder stand structure, a cable pipe structure for protecting a wind turbine foundation cable and a foundation anticorrosion anode system which are required by the integrated single-pile foundation, and has the advantages of convenience and quickness in construction and the like.
As a preferable technical scheme of the utility model, a bending limiter is arranged on the cable between the mud laying surface of the cable and the cable pipe leading into the integrated accessory component, and a cable protective sand cover is arranged above the bending limiter.
As a preferred solution of the utility model, the entire length of cable equipped with the bending limiter and the cable protection sand cover rests on the curing stake.
As a preferable technical scheme of the utility model, the cable protection sand quilt is formed by mutually connecting a plurality of sands.
The cable protection sand quilt is formed by mutually connecting a plurality of sand quilts into a whole and is used for covering the cable section above the solidified soil, and the bending limiter arranged on the cable is combined to further prevent the cable structure from swinging under the action of waves and currents, so that the purpose of protecting the cable is achieved. The number, size, filling material, weight, connection mode and the like of each sand quilt in the cable protection sand quilt can be designed according to specific conditions in a field area.
As a preferable aspect of the present invention, the length of the cured pile decreases in the range from the inside to the outside of the circumference of the single pile foundation pile.
As a preferred technical scheme of the utility model, the elevations of the tops of all the curing piles are consistent and are all constructed to the original mud surface.
As a preferred technical scheme of the utility model, the curing pile is formed by injecting the prepared curing agent into a certain depth below the surface of the sea bed around the single-pile foundation and fully blending the curing agent and soil around the single-pile foundation through full stirring.
As a preferred technical scheme of the utility model, a gap is arranged between the single pile foundation and the solidified pile; and (4) densely filling a curing agent in the gap to form a curing gap, wherein the top and bottom elevations of the curing gap are consistent with those of the adjacent curing piles.
As a preferred technical scheme of the utility model, the shear keys are annularly arranged at equal intervals along the height direction of the single-pile foundation, and the arrangement range of the shear keys is consistent with the height range of the solidified pile adjacent to the single-pile foundation.
In a preferred embodiment of the present invention, the curing agent is a soil curing agent or soil cement.
The solidified piles are anti-scouring main structures and are distributed around the single-pile foundation. During construction, the curing agent which is well designed and prepared is injected into a certain depth below the surface of the sea bed around the single-pile foundation by using the curing equipment and the device on a specific ship, and the curing agent is fully fused with soil around the single-pile foundation by fully stirring to form a cured pile, so that the in-situ consolidation of the seabed foundation is realized, and the purpose of preventing the surrounding of the single-pile foundation from being washed is achieved.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. by adopting a novel solidified pile scouring protection mode, construction is facilitated, and the problems that the stone track is difficult to control, sand is easily broken under a long-term service state and the like in a traditional stone throwing and sand scouring protection scheme are solved;
2. the utility model can design the protection range of the curing pile, the length, the shape and the size of the curing pile according to the specific marine hydrological environment of an engineering field area, can effectively optimize the engineering quantity of scouring protection and reduce the engineering cost;
3. arranging a plurality of shear keys at a gap between the single-pile foundation and the curing pile along the outer wall of the single-pile foundation, densely filling a curing seam formed by a curing agent in the gap, and reinforcing the connection between the single-pile foundation and the curing seam through the interaction between the curing seam and the shear keys;
4. the utility model more effectively protects the scouring development around the single pile foundation, has simple structure and convenient construction, and improves the economic benefit and the social benefit of the engineering.
Drawings
FIG. 1 is an overall front view of the present invention;
FIG. 2 is a partial front view of the present invention;
FIG. 3 is a partial top view of the present invention;
FIG. 4 is a top view of a mono-pile foundation and shear key of the present invention;
fig. 5 is a front view of a mono-pile foundation and shear key of the present invention.
In the figure: 1-single pile foundation, 2-integrated auxiliary component, 3-curing seam, 4-curing pile, 5-bending limiter, 6-cable protective sand cover and 7-shear bond.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The utility model will be further illustrated with reference to the following figures 1-5 and examples, without however being restricted thereto.
As shown in figure 1, the anti-scouring structure of the single-pile foundation of the offshore wind turbine mainly comprises the single-pile foundation 1, a curing seam 3, a curing pile 4 and a cable protective sand quilt 6. The integrated auxiliary member 2 is installed on the single pile foundation 1, the bending limiter 5 is installed on the cable between the mud laying surface of the cable and the cable leading-in pipe before the cable is led to the cable pipe in the integrated auxiliary member 2, and the cable protection sand 6 is directly placed on the bending limiter 5.
As shown in fig. 2, the curing piles 4 are arranged to a certain extent outside the mono pile foundation 1. Considering that the depth of the scoured pit is reduced from the outer side of the circumferential direction of the pile, in order to reduce the curing amount, the curing pile 4 can be implemented in a form of combining a long pile, a transition pile and a short pile. The long piles are arranged close to the periphery of the piles, so that scouring is prevented, and the overall stability of the curing piles 4 is guaranteed. The short piles are arranged on the outermost side of the scouring pit and mainly play a role in preventing scouring, and transition piles are arranged between the long piles and the short piles. The diameter X1-X5, the length Y1-Y5 and the like of the curing pile 4 need to be designed according to the estimated scouring depth and range of a specific engineering field area or the scouring depth and scouring range of the periphery of a single pile foundation before the curing pile 4 is implemented. The solidified piles can be polygonal or circular, the top elevations of each solidified pile 4 are consistent, and the solidified piles are all constructed to the original mud surface. When the solidified pile 4 is to be constructed, the construction of the solidified pile 4 is completed by repeating the procedure of drilling down, stirring, drilling up, and guniting and stirring, and by following the procedure of "from the outside to the inside of the pile". Before the curing pile 4 is implemented, the curing agent suitable for the wind power plant can be prepared according to the specific environment condition of the field, and the curing agent can be cement soil or a soil curing agent and the like.
As shown in fig. 3, the curing seam 3 is located between the mono pile foundation 1 and the curing pile 4. After the construction of the curing pile 4 and the pile sinking of the single-pile foundation 1 are finished, filling the prepared curing agent into the gap between the single pile 1 and the curing pile 4 to form a curing gap 3, and reinforcing the original soil at the gap. The curing seam 3 can be made of grouting material, curing soil and other materials with curing and reinforcing functions. The distance X6 between the curing seam 3 and the mono pile foundation can be specifically designed according to the arrangement of the curing piles 4 and the specific situation of the field area.
As shown in fig. 4 and 5, a plurality of shear keys 7 are circumferentially arranged on the outer wall of the single-pile foundation 1 at equal intervals in the height range of the solidified pile close to the single-pile foundation, and the connection between the single-pile foundation 1 and the solidified seam 3 is strengthened through the interaction between the shear keys 7 and the solidified seam 3. The size, shape, number and arrangement mode of the shear keys 7 can be determined according to specific conditions, and the arrangement range is consistent with the height range of the solidified pile adjacent to the single-pile foundation.
After the construction of the curing piles 4 and the curing seams 3 is completed, the field cables are laid and led up to the cable ducts of the integrated auxiliary members 2, and the bending limiters 5 are installed at the cable suspended sections. The entire cable and bend limiter 5 rest on the curing stake 4. The cable protective sand quilt 6 is directly placed on the bending limiter 5, and the overall motion of the suspended section of the submarine cable under the strong hydrodynamic environment is reduced to the maximum extent under the action of the self gravity of the sand quilt.
According to the description and the drawings of the utility model, a person skilled in the art can easily manufacture or use the offshore wind turbine single-pile foundation anti-scouring structure and can produce the positive effects recorded in the utility model.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. The utility model provides an offshore wind turbine single pile basis scour prevention structure which characterized in that: the single pile foundation structure comprises a single pile foundation, integrated auxiliary components and curing piles annularly arranged on the periphery of the single pile foundation, wherein gaps are formed between the single pile foundation and the curing piles; and arranging a plurality of shear keys on the outer wall of the single-pile foundation in the height range of the curing pile close to the single-pile foundation, densely filling a curing agent in the gap to form a curing gap, and strengthening the connection between the single-pile foundation and the curing gap through the interaction between the curing gap and the shear keys.
2. An offshore wind turbine unit mono-pile foundation anti-scouring structure according to claim 1, characterized in that: a bending limiter is arranged on the cable between the mud laying surface of the cable and a cable pipe leading in the integrated accessory component, and a cable protective sand cover is arranged above the bending limiter.
3. An offshore wind turbine unit mono-pile foundation anti-scouring structure according to claim 2, characterized in that: the entire length of cable, equipped with the bend limiter and cable protection sand cover, rests on the curing stake.
4. An offshore wind turbine unit mono-pile foundation anti-scouring structure according to claim 2, characterized in that: the cable protection sand quilt is formed by mutually connecting a plurality of sands.
5. An offshore wind turbine unit mono-pile foundation anti-scouring structure according to claim 1, characterized in that: the length of the solidified piles in the range from the inner side to the outer side of the periphery of the single-pile foundation pile is reduced in sequence.
6. An offshore wind turbine unit mono-pile foundation anti-scouring structure according to claim 1, characterized in that: and (4) the elevations of the tops of all the curing piles are consistent and all the curing piles are constructed to the original mud surface.
7. An offshore wind turbine unit mono-pile foundation anti-scouring structure according to claim 1, characterized in that: a gap is formed between the single pile foundation and the solidified pile; and (4) densely filling a curing agent in the gap to form a curing gap, wherein the top and bottom elevations of the curing gap are consistent with those of the adjacent curing piles.
8. An offshore wind turbine unit mono-pile foundation anti-scouring structure according to claim 1, characterized in that: the shear keys are annularly arranged at equal intervals along the height direction of the single-pile foundation, and the arrangement range of the shear keys is consistent with the height range of the solidified pile adjacent to the single-pile foundation.
9. An offshore wind turbine unit mono-pile foundation anti-scouring structure according to claim 1, characterized in that: the curing agent is a soil curing agent or cement soil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120538711.XU CN216041358U (en) | 2021-03-16 | 2021-03-16 | Anti-scouring structure for single pile foundation of offshore wind turbine generator system |
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| CN202120538711.XU CN216041358U (en) | 2021-03-16 | 2021-03-16 | Anti-scouring structure for single pile foundation of offshore wind turbine generator system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075283A (en) * | 2021-03-16 | 2022-09-20 | 中国电建集团华东勘测设计研究院有限公司 | Anti-scouring structure for single pile foundation of offshore wind turbine generator and construction method of anti-scouring structure |
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2021
- 2021-03-16 CN CN202120538711.XU patent/CN216041358U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075283A (en) * | 2021-03-16 | 2022-09-20 | 中国电建集团华东勘测设计研究院有限公司 | Anti-scouring structure for single pile foundation of offshore wind turbine generator and construction method of anti-scouring structure |
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