CN216156653U

CN216156653U - Offshore wind power foundation with turbulence strips

Info

Publication number: CN216156653U
Application number: CN202122251551.3U
Authority: CN
Inventors: 邱旭; 曾崇济; 刘鑫; 邵斌田; 刘立勋; 桂洪波; 孙小军
Original assignee: Huaneng Clean Energy Research Institute; Clean Energy Branch of Huaneng International Power Jiangsu Energy Development Co Ltd Clean Energy Branch; Huaneng International Power Jiangsu Energy Development Co Ltd; Shengdong Rudong Offshore Wind Power Co Ltd
Current assignee: Huaneng Clean Energy Research Institute; Clean Energy Branch of Huaneng International Power Jiangsu Energy Development Co Ltd Clean Energy Branch; Huaneng International Power Jiangsu Energy Development Co Ltd; Shengdong Rudong Offshore Wind Power Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-04-01
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses an offshore wind power foundation with turbulence strips, which comprises a pile foundation and the turbulence strips, wherein the pile foundation comprises a first part and a second part, the turbulence strips are at least arranged on the outer peripheral surface of the first part in the pile foundation and protrude from the outer peripheral surface of the pile foundation along a first direction vertical to the axial direction of the pile foundation, and the extension length of the turbulence strips is smaller than the outer diameter of the first part. According to the utility model, the turbulence strips are arranged on the pile foundation, and the turbulence strips are utilized to disturb the flow of sea waves and tides, so that the effect of dissipating tidal current energy is achieved, the purpose of active scour prevention is achieved, the soil around the pile foundation is effectively protected, and the formation of scour pits is avoided.

Description

Offshore wind power foundation with turbulence strips

Technical Field

The utility model relates to the technical field of new energy, in particular to an offshore wind power foundation with a turbulence strip.

Background

The offshore wind power foundation is the key place for supporting the whole offshore wind power generator, and most accidents of the offshore wind power generator are caused by unstable pile foundation. Due to the action of waves and tide, silt around the offshore wind power pile foundation can be flushed and form a flushing pit, and the flushing pit can influence the stability of the pile foundation. In the related technology, a riprap protection method is mainly adopted to protect the foundation, but the riprap protection has poor integrity and large maintenance cost and workload in the application process.

SUMMERY OF THE UTILITY MODEL

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

due to the action of sea waves and tides, a phenomenon of scouring pits occurs around the foundation of the offshore wind power pile. The scouring phenomenon is a complex coupling process involving the interaction of water flow, sediment and structures. The main reason of causing the scouring is horseshoe-shaped vortex generated around the pile foundation, the horseshoe-shaped vortex is generated due to the obstruction of the pile foundation when seawater flows, when the sea water flows towards the pile foundation, the wave current presents a downward rolling and excavating vortex structure, the vortex structure lifts up the sediment on the seabed, and further brings the sediment away from the place around the pile foundation, a scouring pit is formed, the depth of the pile foundation is shallow due to the formation of the scouring pit, the vibration frequency of a cylinder is reduced, the pile foundation is over-fatigue is caused slightly, and the fracture accident is caused seriously.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the offshore wind power foundation provided by the utility model has good anti-scouring performance.

The offshore wind power foundation according to the utility model comprises: pile foundations and turbulence bars;

the pile foundation includes a first portion and a second portion connected to each other in a length direction thereof, the second portion being buried in a seabed having a seabed surface above which the first portion is located;

the vortex strip spiral sets up on the outer peripheral face of pile foundation, the vortex strip is followed the outer peripheral face of pile foundation is outstanding along first direction, first direction quadrature in the axial of pile foundation, the vortex strip is established at least on the first portion, the external diameter of first portion is D, the extension length more than or equal to 0.1D of vortex strip.

According to the utility model, the turbulence strips are arranged on the pile foundation, and the turbulence strips are utilized to disturb the flow of sea waves and tides, so that the effect of dissipating tidal current energy is achieved, the purpose of active scour prevention is achieved, the soil around the pile foundation is effectively protected, and the formation of scour pits is avoided.

In some embodiments, the spoiler helical wraps at least two times around the first portion.

In some embodiments, the upper and lower ends of the spoiler strip are opposite in the axial direction of the pile foundation.

In some embodiments, an included angle between a connecting line between one end and the other end of the turbulence strip and a central axis of the pile foundation along a radial direction of the pile foundation is θ, θ is greater than or equal to 20 ° and less than or equal to 180 °, and a dimension of the turbulence strip in an axial direction of the pile foundation is 0.5D to 3.0D.

In some embodiments, the spoiler includes a plurality of strips, and the plurality of strips are parallel to each other.

In some embodiments, θ is less than or equal to 90 °, the plurality of spoiler strips are arranged at intervals in the circumferential direction of the pile foundation, and the distance between adjacent spoiler strips in the circumferential direction is greater than or equal to 0.1D and less than or equal to 0.7D.

In some embodiments, the plurality of turbulence strips are arranged in the circumferential direction in a flush manner, or adjacent turbulence strips are arranged in a staggered manner in the axial direction of the pile foundation.

In some embodiments, θ is less than or equal to 90 °, the plurality of spoiler strips are arranged at intervals in the axial direction of the pile foundation, and the distance between adjacent spoiler strips in the axial direction is greater than or equal to 0.1D and less than or equal to 1.5D.

In some embodiments, the outer circumferential surface of the first portion includes a front surface facing the direction of the tidal current, a back surface opposite to the front surface, and two side surfaces, and a distance between adjacent spoiler strips distributed on the front surface and the back surface is smaller than a distance between adjacent spoiler strips distributed on the two side surfaces.

In some embodiments, the distance between two adjacent spoiler strips decreases towards the direction close to the surface of the sea bed.

In some embodiments, the spoiler strips spirally surround the first portion for at least three turns, and the distance between axially adjacent sections of the pile foundations of the spoiler strips decreases toward the seabed surface.

In some embodiments, the spoiler is further disposed on the second portion.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural view of a spoiler arranged axially along a pile foundation according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is a schematic structural view of a spoiler arranged axially along a pile foundation according to another embodiment of the present invention.

Fig. 4 is an enlarged schematic view of a portion B in fig. 3.

Fig. 5 is a schematic structural view of a spoiler arranged axially along a pile foundation according to yet another embodiment of the present invention.

Fig. 6 is an enlarged schematic view of a portion C of fig. 5.

Fig. 7 is a schematic structural diagram of spoiler strips arranged along the circumferential direction of a pile foundation according to an embodiment of the present invention.

Fig. 8 is an enlarged schematic view of a portion D in fig. 7.

Fig. 9 is a schematic structural view of spoiler strips arranged along the circumferential direction of a pile foundation according to another embodiment of the present invention.

Fig. 10 is an enlarged schematic view of a portion E of fig. 9.

Reference numerals:

a pile foundation 001;

a first portion 10, a spoiler strip 20, a second portion 30.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

Referring now to fig. 1-10, an offshore wind power foundation with spoiler in accordance with an embodiment of the present invention is described, comprising a pile foundation 001 and a spoiler strip 20, the pile foundation 001 comprising a first section 10 and a second section 20 interconnected in the length direction thereof, the second section 20 being embedded in a seabed, the seabed having a seabed surface, the first section 10 being located above the seabed surface; that is, the first section 10 of the pile foundation 001 is buried in the seabed, the first section 10 is exposed above the surface of the seabed, the first section 10 and the second section 30 integrally constitute the pile foundation 001, and the pile foundation 001 is used to support an offshore power generating unit.

The turbulence strips 20 are at least spirally arranged on the outer peripheral surface of the first part 10 in the pile foundation 001, the turbulence strips 20 protrude from the outer peripheral surface of the pile foundation 001 along a first direction, the first direction is orthogonal to the axial direction of the pile foundation 001, the first direction is the radial direction of the pile foundation 001 in the embodiment, namely, the turbulence strips 20 are spirally and annularly arranged on the outer peripheral surface of the pile foundation 001, the turbulence strips 20 protrude outwards along the radial direction of the pile foundation 001, turbulence channels are formed between the protruding parts of the adjacent turbulence strips 20, active turbulence is carried out by the aid of the flow of the turbulence strips 20 which are spirally arranged towards the pile foundation 001, the flow speed and the direction of the flow are locally changed, and energy of the flow can be dissipated to a certain degree.

Further, the outer diameter of the first portion 10 is D, the extension length of the spoiler strip 20 is greater than or equal to 0.1D, the value range of D in this embodiment is 6m to 8m, specifically, D may be selected as 7m, the extension length of the corresponding spoiler strip 20 in the axial direction of the pile foundation 001 is at least 0.7m, and the extension length of the spoiler strip 20 in this embodiment may be selected as 1.2 m.

As shown in fig. 1 and 2, in other embodiments, the turbulence strips 20 spirally surround the first portion for at least two circles, that is, at least two circles of the turbulence strips 20 which are spiral are arranged on the first portion 10 in the pile foundation 001, in this embodiment, three circles of the turbulence strips 20 which are spiral are arranged on the pile foundation 001 in parallel, the adjacent turbulence strips 20 are connected end to end, that is, the upper end of the turbulence strip 20 which is positioned at the bottommost portion is connected with the lower end of the adjacent turbulence strip 20, and so on, and then the three circles of the turbulence strips 20 integrally form a spiral turbulence fluid, so that the turbulence capability of the sea waves or tide waves is greatly improved through the spiral turbulence body, and the protection strength of the pile foundation is enhanced.

It should be noted that, the three circles of turbulence strips 20 in the above embodiment may also be arranged at intervals along the axial direction of the pile foundation 001 at a certain distance, and the three circles of turbulence strips 20 disturb the waves or tides at different depth positions respectively, thereby increasing the protection area of the pile foundation 001 to a certain extent.

Further, the upper end and the lower end of the turbulence bar 20 are opposite in the axial direction of the pile foundation 001, that is, the starting end and the stopping end of the turbulence bar 20 arranged on the pile foundation 001 are positioned on the same vertical straight line, and when the turbulence bar 20 is wound on the pile foundation 001, the starting end and the stopping end of the turbulence bar 20 are positioned on the same vertical straight line, so that the starting end of the next turbulence bar 20 can be conveniently wound by taking the stopping end as the starting end of the next turbulence bar, and the continuous position adjustment of a construction tool is avoided.

It should be noted that the upper and lower ends of the spoiler 20 in the above-mentioned embodiment may also be disposed in a staggered manner, that is, the originating end and the terminating end of the spoiler 20 may also be disposed on different vertical lines.

In other embodiments, an included angle between a connection line between one end and the other end of each turbulence strip 20 along a radial direction of the pile foundation 001 and a central axis of the pile foundation 001 is θ, it can also be understood that one end of each turbulence strip 20 is a fixed base point, the other end of each turbulence strip 20 is rotatably offset at a certain angle on the pile foundation 001, for example, when one end and the other end of the spoiler 20 are aligned with each other, the arrangement form of the spoiler 20 includes a vertical arrangement and a horizontal arrangement, when one end and the other end of the spoiler 20 are not in the same straight line, the spoiler 20 is disposed in a bent manner, that is, vortex strip 20 can be vertical or the level winding sets up on stake basis 001, also can buckle vortex strip 20 and set up after certain angle on stake basis 001, along with the continuous grow of theta value, vortex strip 20 is set up the change to buckling by initial vertical setting, forms the level setting after reaching the certain degree at last.

Further, theta is greater than or equal to 20 degrees and less than or equal to 180 degrees, when theta is 20 degrees, one end and the other end of the turbulence strip 20 are located on the same vertical straight line, when theta is 180 degrees, one end and the other end of the turbulence strip 20 are located on the same horizontal straight line, and when theta is greater than 180 degrees and is greater than 20 degrees, the turbulence strip 20 is arranged on the pile foundation 001 in a bent mode.

Further, the vortex strip 20 includes many, and many vortex strips 20 are parallel to each other, and many vortex strips 20 set up on vortex strip 20 along vortex strip 20 circumference parallel according to certain distance at an interval, and interval more than or equal to 0.1D and less than or equal to 0.7D between the adjacent vortex strip 20 in the circumference, that is to say, the interval more than or equal to 0.1D and less than or equal to 0.7D between the vortex strip of controlling adjacent arrangement.

It should be noted that the plurality of turbulence strips 20 are arranged in a bent manner on the pile foundation 001, and the setting angle θ of the turbulence strips 20 is smaller than or equal to 90 °, and at this time, the turbulence strips 20 are the turbulence strips 20 which do not completely surround the pile foundation by one turn.

Further, many vortex strips 20 are at circumference upper parallel and level, and many vortex strips 20 that buckle the setting set up along the parallel interval setting of pile foundation circumference for form a plurality of vortex passageways between the adjacent vortex strip 20 in the pile foundation circumference, break up the trend through a plurality of adjacent vortex strips 20 and a plurality of vortex passageways, can change the velocity of flow and direction of trend, make the energy of trend can dissipate to a certain extent.

It should be noted that, in the above embodiment, the plurality of turbulence strips 20 may also be staggered in the axial direction of the pile foundation, and the adjacent turbulence strips 20 are staggered in the axial direction of the pile foundation 001, that is, the adjacent turbulence strips 20 in the plurality of turbulence strips 20 are staggered end to end, and a step shape is formed between the adjacent turbulence strips 20, so that the turbulence steps between the turbulence strips 20 and the adjacent turbulence strips 20 may be used for shunting the sea waves and the tides, thereby changing the directions of the sea waves and the tides, playing a role in dispersing the impact force of the sea waves and the tides, and reducing the scouring strength of the pile foundation 001.

Further, the outer peripheral face of first part is including the front towards the trend direction, the front relative back and two sides, the interval of the adjacent vortex strip 20 that distributes on front and back is less than the interval of the adjacent vortex strip 20 that distributes on two sides, that is to say, the vortex strip 20 that sets up on the front towards the trend direction on stake basis 001 first part 10 and the stake basis 001 back sets up the vortex strip 20 that quantity will be higher than stake basis 001 both sides sets up quantity, so make marine wind power basis can enough have stronger scour prevention ability, can reduce its manufacturing cost again, reduce the manufacturing difficulty.

In other embodiments, the setting angle θ of the turbulence strips 20 is equal to or less than 90 °, that is, the setting form of the turbulence strips 20 is a bending setting, the plurality of turbulence strips 20 are arranged on the pile foundation 001 at bending intervals along the axial direction of the pile foundation 001, the plurality of turbulence strips 20 arranged at the bending intervals form a plurality of turbulence channels, the flow velocity and direction of the tidal current can be changed by using the plurality of turbulence strips 20 and the turbulence channels, the scouring force of the tidal current is dispersed, the pile foundation 001 is protected, the distance between the axially adjacent turbulence strips 20 is equal to or greater than 0.1D and equal to or less than 1.5D, that is, the distance between the vertically adjacent turbulence strips is equal to or greater than 0.1D and equal to or less than 1.5D.

It should be noted that many in the above-mentioned embodiment the vortex strip 20 sets up along stake basis 001 axial parallel and level, that is to say, can correspond the winding of parallel and level with many vortex strips 20 and set up on stake basis 001, and the upper end of many vortex strips 20 is in same horizontal plane, and the upper end that many vortex strips 20 correspond is in same horizontal plane.

It should be noted that many vortex strips 20 still can follow pile foundation 001 axial interval crisscross setting each other in above-mentioned embodiment, that is to say, can set up many vortex strips 20 crisscross end to end on

pile foundation

001, 20 crisscross settings of a plurality of adjacent vortex strips end to end form a plurality of vortex ladders and vortex channels, utilize vortex strip, vortex ladder and vortex channel to change the velocity of flow and the direction of trend, make pile foundation the place ahead can not produce great horseshoe vortex, thereby the formation of horseshoe vortex has been suppressed in the source.

Further, adjacent two the interval of vortex strip 20 reduces to the direction of being close to the sea bed face, that is to say, the interval between a plurality of vortex strips 20 that set up on stake basis 001 on the first portion 10 diminishes gradually on to the second portion 30, the setting interval of being close to the adjacent vortex strip 20 of sea bed face position department just is littleer more, can understand that, the setting quantity that is close to sea bed face vortex strip 20 on stake basis 001 first portion 10 more just is more, the protection intensity of reinforcing sea level position department stake basis, five vortex strips are selected in this embodiment, and the interval that sets up between the adjacent vortex strip is 1m, 0.8m, 0.55m, 0.2m from top to bottom in proper order.

In other embodiments, the vortex strip 20 spiral encircles first part is three rings at least, vortex strip 20 is in interval between the axial upper adjacent section of stake basis 001 reduces to the direction of being close to the sea bed face, that is to say at least winding three rings of vortex strip 20 on stake basis 001 first part, and interval between the adjacent vortex strip 20 reduces to being close to the sea bed face direction gradually, can understand, it is more to set up quantity at the vortex strip 20 that is close to sea bed face department more, can strengthen the protective strength who is close to sea bed face position department stake basis 001 through the quantity that sets up that increases vortex strip 20, choose three rings of vortex strips in this example for use, specifically set up the interval and be 1m and 0.6 m.

In other embodiments, the spoiler strips 20 are further disposed on the second portion 30, that is, the spoiler strips 20 may be disposed not only on the first portion 10, but also on the second portion 30, so as to enhance the overall anti-erosion capability of the pile foundation 001.

Further, the plurality of spoiler strips 20 may have different cross-sectional shapes, for example, a triangular, rectangular or semicircular cross-sectional shape, and the protruding heights of the portions protruding in the first direction on the adjacent spoiler strips 20 may be set differently, so that the flow direction of sea waves and tides may be effectively changed by using the combined arrangement of the spoiler strips 20 having different cross-sectional shapes and different protruding heights, and the impact force of the sea waves and the tides may be weakened.

As shown in fig. 1 and fig. 2, it should be noted that in this embodiment, a spoiler having a triangular cross-sectional shape may be selected, and the triangular spoiler 20 is disposed on the pile foundation 001 at intervals in parallel along the circumferential direction of the pile foundation 001.

As shown in fig. 7 and 8, it should be noted that, in the above embodiment, the cross-sectional shape of the spoiler 20 is a triangle, and the triangle spoiler 20 may also be arranged on the pile foundation 001 axially at intervals and in parallel.

As shown in fig. 3 to 6 and fig. 9 to 10, it should be noted that the spoiler strips 20 may also be single spoiler strips 20 with a rectangular or semicircular cross section, and the spoiler strips 20 with a rectangular or semicircular cross section are arranged along the circumferential direction or the axial direction of the pile foundation 001.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. An offshore wind power foundation with spoiler strips, comprising:

a pile foundation including a first portion and a second portion interconnected in a length direction thereof, the second portion being buried in a seabed, the seabed having a seabed surface, the first portion being located above the seabed surface;

the vortex strip, vortex strip spiral setting is in on the outer peripheral face of pile foundation, the vortex strip is followed the outer peripheral face of pile foundation is outstanding along the first direction, the first direction quadrature in the axial of pile foundation, the vortex strip is established at least on the first portion, the external diameter of first portion is D, the extension length more than or equal to 0.1D of vortex strip.

2. Offshore wind foundation with spoiler strips according to claim 1, characterized in that the spoiler strips spiral around the first part at least two turns.

3. The offshore wind power foundation with the spoiler strips as recited in claim 1, wherein an included angle between a connecting line between one end and the other end of the spoiler strips along a radial direction of the pile foundation and a central axis of the pile foundation is θ, θ is greater than or equal to 20 ° and less than or equal to 180 °, and a dimension of the spoiler strips in an axial direction of the pile foundation is 0.5D to 3.0D.

4. Offshore wind farm with spoiler strips according to claim 3, characterized in that the spoiler strips comprise a plurality of strips, which are parallel to each other.

5. The offshore wind power foundation with spoiler strips according to claim 4, wherein θ is less than or equal to 90 °, the plurality of spoiler strips are arranged at intervals in the circumferential direction of the pile foundation, and the distance between adjacent spoiler strips in the circumferential direction is greater than or equal to 0.1D and less than or equal to 0.7D.

6. The offshore wind power foundation with turbulators of claim 5, wherein the outer peripheral surface of the first portion comprises a front surface facing the direction of the current, a back surface opposite to the front surface, and two side surfaces, and the distance between adjacent turbulators distributed on the front surface and the back surface is smaller than the distance between adjacent turbulators distributed on the two side surfaces.

7. The offshore wind power foundation with spoiler strips according to claim 4, wherein θ is less than or equal to 90 °, the plurality of spoiler strips are arranged at intervals in the axial direction of the pile foundation, and the distance between adjacent spoiler strips in the axial direction is greater than or equal to 0.1D and less than or equal to 1.5D.

8. The offshore wind turbine foundation with spoiler strips according to claim 7, wherein the distance between two adjacent spoiler strips decreases towards the direction close to the surface of the seabed.

9. The offshore wind turbine foundation with turbulator bars of claim 1, wherein the turbulator bars helically encircle the first portion for at least three turns, and the distance between axially adjacent sections of the turbulator bars decreases in a direction towards the sea bed surface.

10. Offshore wind foundation with spoiler strips according to claim 1, characterized in that the spoiler strips are also arranged on the second part.