CN113774964A - Offshore wind power anti-scouring device with energy dissipation nail - Google Patents
Offshore wind power anti-scouring device with energy dissipation nail Download PDFInfo
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- CN113774964A CN113774964A CN202111089025.XA CN202111089025A CN113774964A CN 113774964 A CN113774964 A CN 113774964A CN 202111089025 A CN202111089025 A CN 202111089025A CN 113774964 A CN113774964 A CN 113774964A
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- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 139
- 238000009991 scouring Methods 0.000 title claims abstract description 32
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 14
- 230000003628 erosive effect Effects 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 8
- 239000004575 stone Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000013535 sea water Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 2
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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
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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
Abstract
The invention discloses an offshore wind power anti-scouring device with energy dissipation nails, which comprises a pile foundation, a sleeve and the energy dissipation nails, wherein the pile foundation comprises a first part and a second part which are mutually connected in the axial direction of the pile foundation, the second part is embedded in a seabed, the seabed is provided with a seabed surface, and the first part is positioned above the seabed surface; the sleeve is sleeved on the first portion, the bottom of the sleeve is supported on the seabed surface, energy dissipation nails protruding outwards are arranged on the outer peripheral surface of the sleeve, the ratio of the axial dimension of each energy dissipation nail to the circumferential dimension of the sleeve is greater than or equal to 1/2 and smaller than or equal to 2, the energy dissipation nails are multiple, the energy dissipation nails are distributed in the axial direction of the sleeve and/or in the circumferential direction of the sleeve at intervals, the outer diameter of the sleeve is De, and the interval between every two adjacent energy dissipation nails is greater than or equal to 0.25De and smaller than or equal to 1.0 De. The offshore wind power anti-scouring device with the energy dissipation nail provided by the embodiment of the invention has the advantages of good turbulent flow effect, higher stability and the like.
Description
Technical Field
The invention relates to the field of offshore wind power, in particular to an offshore wind power anti-scouring device with energy dissipation nails.
Background
Wind energy is increasingly regarded by human beings as a clean and harmless renewable energy source. Compared with land wind energy, offshore wind energy resources not only have higher wind speed, but also are far away from a coastline, are not influenced by a noise limit value, and allow the unit to be manufactured in a larger scale.
The offshore wind power foundation is the key point for supporting the whole offshore wind power machine, the cost accounts for 20-25% of the investment of the whole offshore wind power, and most accidents of offshore wind power generators 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 addition, the water flow mixed with silt near the surface of the seabed continuously washes the pile foundation, corrodes and destroys the surface of the pile foundation, and can cause the collapse of the offshore wind turbine unit in serious cases. The anti-scouring device of the currently adopted offshore wind power pile foundation is mainly a riprap protection method. However, the integrity of the riprap protection is poor, and the maintenance cost and the workload in the application process are large.
Disclosure of Invention
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 embodiment of the invention provides an offshore wind power anti-scouring device with energy dissipation nails.
According to the embodiment of the invention, the offshore wind power anti-scouring device with the energy dissipation nail comprises:
a pile foundation including a first portion and a second portion connected to each other in an axial direction thereof, the second portion being buried in a seabed having a seabed surface above which the first portion is located;
the energy dissipation nail sleeve comprises a sleeve, the sleeve is sleeved on the first portion, the bottom of the sleeve is supported on the seabed surface, energy dissipation nails protruding outwards are arranged on the outer peripheral surface of the sleeve, the ratio of the dimension of the energy dissipation nails in the axial direction of the sleeve to the dimension of the energy dissipation nails in the circumferential direction surrounding the sleeve is greater than or equal to 1/2 and less than or equal to 2, the energy dissipation nails are arranged in the axial direction of the sleeve and/or in the circumferential direction surrounding the sleeve at intervals, the outer diameter of the sleeve is De, and the interval between every two adjacent energy dissipation nails is greater than or equal to 0.25De and less than or equal to 1.0 De.
The offshore wind power anti-scouring device with the energy dissipation nail provided by the embodiment of the invention has the advantages of good turbulent flow effect, higher stability and the like.
In some embodiments, the density of the energy dissipating nails increases towards the surface of the seabed.
In some embodiments, the outer circumferential surface of the sleeve comprises a front surface facing in the direction of the flow of the water, a back surface opposite to the front surface, and two side surfaces, the density of the energy dissipating nails distributed on the front surface and the back surface being greater than the density of the energy dissipating nails distributed on the two side surfaces.
In some embodiments, two adjacent energy dissipation nails in the axial direction of the sleeve are staggered, the distance between the two adjacent energy dissipation nails in the circumferential direction around the sleeve is greater than or equal to 0.25De and less than or equal to 1.0De,
and/or two adjacent energy dissipation nails are staggered in the circumferential direction around the sleeve, and the distance between the two adjacent energy dissipation nails in the axial direction of the sleeve is greater than or equal to 0.1De and smaller than or equal to 0.4 De.
In some embodiments, the plurality of energy dissipation nails are divided into a plurality of rows, each row of energy dissipation nails includes a plurality of energy dissipation nails arranged at equal intervals in the axial direction of the sleeve, the plurality of rows of energy dissipation nails are arranged in the circumferential direction of the sleeve, and two adjacent rows of energy dissipation nails are staggered in the circumferential direction of the sleeve.
In some embodiments, the size of some of the energy dissipation nails is different from that of the rest of the energy dissipation nails, and the energy dissipation nails of different sizes are alternately arranged on the outer circumferential surface of the sleeve.
In some embodiments, the energy dissipating pins protrude in a first direction orthogonal to the axial direction of the sleeve, the dimension of the energy dissipating pins in the first direction being the thickness of the energy dissipating pins, the thickness of the energy dissipating pins being 0.1 to 0.4 m.
In some embodiments, the bottom of the sleeve has an anti-sink plate extending along the seabed surface, the bottom surface of the anti-sink plate is against the seabed surface,
the bottom of the sleeve is provided with a soil cutting plate extending towards the seabed along the axial direction of the pile foundation, and the bottom end of the soil cutting plate is of a knife-edge structure.
In some embodiments, the outer circumferential surface of the sleeve is a curved surface that is concave in a direction toward the first portion, and the outer diameter of the sleeve increases in a direction toward the sea bed surface.
In some embodiments, the distance from the top end of the sleeve to the surface of the sea bed in the axial direction of the pile foundation is greater than or equal to 0.3 De.
Additional aspects and advantages of the invention 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 invention.
Drawings
Figure 1 is a schematic view of an offshore wind power scour protection having energy dissipating nails, according to an embodiment of a first aspect of the present invention.
Figure 2 is a schematic view of an offshore wind power scour protection having energy dissipating nails, according to an embodiment of a second aspect of the present invention.
Figure 3 is a schematic view of an arrangement of energy dissipating nails according to an embodiment of the invention.
Reference numerals:
an offshore wind power erosion prevention device 100 with energy dissipation nails; pile foundations 1; a first portion 11; a second portion 12; an energy dissipation nail 2; a sleeve 3; an anti-settling plate 31; a cutting plate 32.
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 invention and are not to be construed as limiting the invention.
An offshore wind turbine erosion protection device 100 with energy dissipating pins according to an embodiment of the present invention is described below with reference to fig. 1-3, and the offshore wind turbine erosion protection device 100 with energy dissipating pins comprises a pile foundation 1, a sleeve 3 and energy dissipating pins 2.
The pile foundation 1 comprises a first portion 11 and a second portion 12 connected to each other in the axial direction thereof, the second portion 12 being buried in a seabed having a seabed surface above which the first portion 11 is located;
the sleeve 3 is sleeved on the first portion 11, the bottom of the sleeve is supported on a seabed surface, energy dissipation nails 2 protruding outwards are arranged on the outer peripheral surface of the sleeve 3, the ratio of the axial dimension of the energy dissipation nails 2 in the sleeve 3 to the circumferential dimension of the sleeve 3 is greater than or equal to 1/2 and less than or equal to 2, the energy dissipation nails 2 are multiple, the energy dissipation nails 2 are arranged in the axial direction of the sleeve 3 and/or in the circumferential direction of the sleeve 3 at intervals, the outer diameter of the sleeve 3 is De, and the interval between adjacent energy dissipation nails 2 is greater than or equal to 0.25De and less than or equal to 1.0 De.
As can be seen by those skilled in the art, the conventional pile foundations 1 are hollow cylindrical structures, and the sea bed surface is the interface between seawater and underwater sand. A first part 11 and a second part 12 connected to each other are provided in order in the up-down direction of the pile foundation 1. The first part 11 of the pile foundation 1 is located in the sea water above the surface of the sea bed and the second part 12 of the pile foundation 1 is buried in the sand below the surface of the sea bed.
In order to make the technical solution of the present application easier to understand, the technical solution of the present application is further described below by taking as an example that the radial direction of the sleeve 3 coincides with the inside-outside direction, and the axial direction of the sleeve 3 coincides with the up-down direction, where the up-down direction and the inside-out direction are shown in fig. 1.
The sleeve 3 is fixed on the peripheral surface of the first part 11, the bottom of the sleeve 3 is contacted with the surface of the sea bed, and the sleeve 3 supports the gravity of the sleeve by the surface of the sea bed. The outer circumferential surface of the sleeve 3 is provided with energy dissipation nails 2 capable of dissipating tidal current energy, and the energy dissipation nails 2 protrude outwards.
The dimension of the energy dissipation nail 2 in the vertical direction is the length L of the energy dissipation nail 2, the dimension of the energy dissipation nail 2 in the circumferential direction of the pile foundation 1 is the width M of the energy dissipation nail 2, and L is 0.5 to 2 times of M, for example, L can be 0.5, 1, 1.5, 1.8, 2 times of M.
The plurality of energy dissipation nails 2 are arranged at intervals in the outer circumferential direction of the sleeve 3 and/or in the vertical direction of the pile foundation 1. The outer diameter of the sleeve 3 is De, which ranges from 5 to 8 meters. For example, De may be 5 meters, 6 meters, 6.5 meters, 7 meters, 8 meters, etc., preferably De is 6 meters.
As shown in fig. 3, the interval between two adjacent energy dissipation nails 2 is e, and e refers to the straight line distance of the central position o point of two adjacent energy dissipation nails 2 in the space. e is 0.25 to 1 times De. For example, e can be 0.25De, 0.3De, 0.45De, 0.9De, etc.
According to the offshore wind power erosion prevention device 100 with the energy dissipation nail provided by the embodiment of the invention, the sleeve 3 with the energy dissipation nail 2 is arranged on the pile foundation 1, and as the energy dissipation nail 2 protrudes outwards on the outer peripheral surface of the sleeve 3, when tide contacts the energy dissipation nail 2, the energy dissipation nail 2 can 'break up' the tide and locally change the flow speed and direction of the tide, so that the energy of the tide can be dissipated to a certain extent, larger horseshoe-shaped vortexes cannot be generated near the sleeve 3, the formation of the horseshoe-shaped vortexes is restrained from the source, the purpose of active erosion prevention is achieved, and the soil around the sleeve 3 is effectively protected. Compared with the stone throwing protection method in the related art, the stone throwing protection method has the advantages of stronger stability, better anti-scouring effect and better reliability.
Therefore, the offshore wind power anti-scouring device 100 with the energy dissipation nails provided by the embodiment of the invention has the advantages of good turbulence effect, higher stability and the like.
In the related art, the position of the pile foundation 1 close to the surface of the sea bed is the main place where the vortex is formed, the impact force of the tide on the pile foundation 1 is also larger, and the number of scouring pits caused by the vortex is larger.
In some embodiments, the density of the energy dissipating nails 2 increases towards the surface of the seabed.
For example, as shown in fig. 2, the density of the energy dissipating nails 2 gradually increases in the vicinity of the surface of the sea bed. Therefore, the design can carry out tidal current on the tidal current in a targeted manner so as to dissipate the energy of the vortex, and further the energy of the vortex can be dissipated before reaching the surface of the sea bed, so that the formation of a scouring pit can be greatly reduced.
In the related art, the offshore power generation facility is mainly disposed in a shallow water region where the tidal current mainly approaches the coastline or moves away from the coastline in a direction approximately perpendicular to the coastline when the tidal current rises and falls, so that the side of the offshore power generation facility facing the coastline and the side facing away from the coastline are where the tidal current mainly impacts. In the two places of the offshore power generation equipment, the impact force of the borne tide is larger, and the number of scouring pits caused by the vortex is larger. The remaining two sides of the offshore unit extend in a direction substantially corresponding to the direction of the current, so that the offshore unit is subjected to mainly frictional forces and small impact forces of the current.
In some embodiments, the outer circumferential surface of the sleeve 3 includes a front surface facing the direction of the flow of the water, a back surface opposite to the front surface, and two side surfaces, and the density of the energy dissipating nails 2 distributed on the front surface and the back surface is greater than the density of the energy dissipating nails 2 distributed on the two side surfaces.
For example, in a shallow water region, the front surface of the sleeve 3 is a surface facing away from the coastline, the surface facing away from the coastline receives the greatest tidal current impact, and the back surface of the sleeve 3 is a surface facing the coastline.
The density of the energy dissipating nails 2 arranged on the front and back of the sleeve 3 is greater with respect to the remaining two sides of the sleeve 3. For example, the density of the energy dissipating nails 2 arranged on the front and side faces of the sleeve 3 is 2 times that of the remaining two side faces. Therefore, the offshore wind power anti-scouring device 100 with the energy dissipation nail can not only have strong anti-scouring capacity, but also reduce the manufacturing cost and reduce the manufacturing difficulty.
It will be appreciated that the front and back faces of the sleeve 3 are exemplary. In many sea areas, the direction of the current is not uniform, for example, in some sea areas, the current flows east and west year after year, and the current flows north and south rarely occur. When the sleeve 3 is subjected to the tide of the flow of things, the sea beds on the east and west sides of the sleeve 3 are most likely to produce larger scour pits, while the sea beds on the south and north sides produce smaller scour pits. At this time, the density of the energy dissipating nails 2 arranged on the east and west sides of the sleeve 3 is large.
In some embodiments, two adjacent energy dissipation nails 2 are staggered in the axial direction of the sleeve 3, the distance between the two adjacent energy dissipation nails 2 in the circumferential direction around the sleeve 3 is greater than or equal to 0.25De and less than or equal to 1.0De,
and/or two adjacent energy dissipation nails 2 are staggered in the circumferential direction around the sleeve 3, and the distance between the two adjacent energy dissipation nails 2 in the axial direction of the sleeve 3 is greater than or equal to 0.1De and smaller than or equal to 0.4 De.
For example, the plurality of energy dissipating nails 2 are spaced apart in the vertical direction, the plurality of energy dissipating nails 2 on the same straight line in the vertical direction are one row of energy dissipating nails 2, the number of the energy dissipating nails 2 in each row is the same, and the plurality of rows of energy dissipating nails 2 are spaced apart and distributed on the outer circumferential surface of the sleeve 3.
The uppermost energy dissipation nail 2 in each row of the energy dissipation nails 2 is not at the same level as the uppermost energy dissipation nail 2 in the adjacent row of the energy dissipation nails 2, thereby forming a plurality of rows of the energy dissipation nails 2 which are arranged in a staggered way on the outer peripheral surface of the sleeve 3. For example, one row of the energy dissipation nails 2 is an a row, the row of the energy dissipation nails 2 adjacent to the a row of the energy dissipation nails 2 is a B row, the uppermost energy dissipation nail 2 of the row a of the energy dissipation nails 2 is numbered a1, the rows below the row a of the energy dissipation nails 2 are sequentially a2, A3 and a4 …, the uppermost energy dissipation nail 2 of the row B of the energy dissipation nails 2 is numbered B1, the rows below the row B of the energy dissipation nails 2 are sequentially B2, B3 and B4 …, a1 and B1 are not at the same horizontal height, and then a2 and B2 are not at the same horizontal height, the rows a1 and B1 are staggered in the circumferential direction of the sleeve 3, so that the rows a of the energy dissipation nails 2 and the rows B of the energy dissipation nails 2 are staggered in the circumferential direction of the sleeve 3.
Further, in the circumferential direction of the liner 3, there are columns C, D, E, F, and the like. A1, B1, C1, D1, E1, F1, etc. may be arranged in a regular pattern, for example, a1, B1, C1, D1, E1, F1, etc. are arranged spirally rising on the outer circumferential surface of the sleeve 3. Alternatively, a1, B1, C1, D1, E1, F1, etc. may also be randomly arranged.
The distance between two adjacent energy dissipating nails 2 in the circumferential direction of the surrounding sleeve 3 is equal to or greater than 0.25De and equal to or less than 1.0De, that is, the distance between a1 and B1 in the circumferential direction of the surrounding sleeve 3 is equal to or greater than 0.25De and equal to or less than 1.0De, for example, the distance between a1 and B1 is 0.25De, 0.5De, 0.85De, 1.0De, etc.
It should be noted that, in each row of the energy dissipation nails 2, two adjacent energy dissipation nails 2 may be arranged at equal intervals, may also be arranged according to a certain rule, or may be arranged at random intervals. For example, in column A, the spacing between A1 and A2 is one value and the spacing between A2 and A3 is another value, which may or may not be equal.
It should be noted that in other embodiments, the number of the two adjacent rows of the energy dissipating nails 2 may not be the same. For example, one row is provided with X energy dissipating nails 2, and the other row is provided with Y energy dissipating nails 2. Alternatively, a plurality of the energy dissipating nails 2 are closely arranged together.
In other embodiments, two energy dissipating nails 2 adjacent in the circumferential direction around the sleeve 3 are staggered, and this arrangement is substantially the same as the above arrangement and will not be described in detail here.
The distance between two adjacent energy dissipation nails 2 in the axial direction of the sleeve 3 is equal to or greater than 0.1De and equal to or less than 0.4De, which means that the distance between two adjacent energy dissipation nails 2 in the vertical direction of the sleeve 3 is equal to or greater than 0.1De and equal to or less than 0.4De, and for example, the distance between two adjacent energy dissipation nails 2 in the vertical direction of the sleeve 3 is equal to or greater than 0.1De, 0.25De, 0.35De, 0.4De, or the like.
From this, can be according to certain law staggered arrangement between a plurality of energy dissipation nail 2, also can arrange at random between a plurality of energy dissipation nail 2, and then form diversified crisscross form on the surface of sleeve 3 to can choose for use the energy dissipation nail 2 of different crisscross forms according to the waters of difference, and then more effectually carry out the vortex to the trend, realize the marine wind power anti-scouring device 100's that has the energy dissipation nail diversification.
In some embodiments, the plurality of energy dissipation nails 2 are divided into a plurality of rows, each row of energy dissipation nails 2 includes a plurality of energy dissipation nails 2 arranged at equal intervals in the axial direction of the sleeve 3, the plurality of rows of energy dissipation nails 2 are arranged in the circumferential direction of the sleeve 3, and two adjacent rows of energy dissipation nails 2 are staggered in the circumferential direction of the sleeve 3.
For example, as shown in fig. 1, a plurality of rows of energy dissipating nails 2 such as A, B, C, D, E, F are provided on the sleeve 33, and the intervals between two adjacent energy dissipating nails 2 in each row of energy dissipating nails 2 are equal. The spacing between a1 and a2, the spacing between a2 and A3, the spacing between A3 and a4, etc. are all equal. The multiple rows of energy dissipation nails 2 are regularly and alternately arranged, the distances from A1, C1 and E1 to the center line of the pile foundation 1 are first set distances, and the distances from B1, D1 and F1 to the center line of the pile foundation 1 are second set distances. The first set distance and the second set distance are different, and the interval between a1 and B1, the interval between B1 and C1, the interval between C1 and D1, and the like are equal. Therefore, the energy dissipation nails 2 are regularly and uniformly distributed on the outer peripheral surface of the sleeve 3, so that workers can conveniently process the energy dissipation nails 2.
In some embodiments, the size of some of the energy dissipating nails 2 is different from that of the rest of the energy dissipating nails 2, and the energy dissipating nails 2 of different sizes are alternately arranged on the outer circumferential surface of the sleeve 3.
For example, as shown in fig. 3, the dimensions of the energy dissipating nail 2 are length, width, height, etc. of the energy dissipating nail 2. The size of the energy dissipation nail 2 in the up-down direction of the sleeve is the length L of the energy dissipation nail 2, the size of the energy dissipation nail 2 in the circumferential direction surrounding the pile foundation 1 is the width M of the energy dissipation nail 2, and the thickness N of the energy dissipation nail 2 in the radial direction of the pile foundation is the size of the energy dissipation nail 2. On the sleeve, the dissipaters 2 in different positions have different sizes.
From this, through setting up different sizes, increase the irregularity of the energy dissipation nail 2 that sets up, energy dissipation nail 2 is when facing trend and horseshoe vortex, can break up the rule of flow of trend and horseshoe vortex better and break up in disorder, the bigger degree changes rivers flow direction and velocity of flow upwards, the reinforcing has the marine wind power anti-scouring device 100's of energy dissipation nail scour prevention ability, and make the marine wind power anti-scouring device 100 that has the energy dissipation nail can deal with the trend and the horseshoe vortex of multiple energy gradient, the adaptability of marine wind power anti-scouring device 100 with the energy dissipation nail has been strengthened.
In some embodiments, the energy dissipating nails 2 protrude in a first direction orthogonal to the axial direction of the sleeve 3, the dimension of the energy dissipating nails 2 in the first direction is the thickness of the energy dissipating nails 2, and the thickness of the energy dissipating nails 2 is 0.1m to 0.4m, so that the energy dissipating nails 2 have a good turbulent energy dissipating effect.
As shown in fig. 3, the first direction is the radial direction of the sleeve 3, the thickness dimension of the energy dissipation nail 2 is denoted by N, and when the energy dissipation nail 2 is a regular geometric body, the thickness of the energy dissipation nail 2 is the dimension of the energy dissipation nail 2 in the radial direction; when the energy dissipating nails 2 are irregular geometric bodies, the thickness of the energy dissipating nails 2 is the maximum dimension of the energy dissipating nails 2 in the radial direction.
For example, the thickness of the energy dissipation nail 2 is 0.1m, 0.2m, 0.3m, 0.4m, etc., so as to make the turbulent flow energy dissipation effect of the energy dissipation nail 2 better.
In some embodiments, the bottom of the sleeve 3 has an anti-settling plate 31 extending along the surface of the sea bed, the bottom surface of the anti-settling plate 31 being against the surface of the sea bed,
the bottom of the sleeve 3 is provided with a soil cutting plate 32 extending inwards to the seabed along the axial direction of the pile foundation 1, and the bottom end of the soil cutting plate 32 is of a knife-edge structure.
For example, as shown in fig. 1-2, the lower end of the sleeve 3 is provided with an outward extending anti-sinking plate 31, whereby the dust-proof plate can increase the bearing area of the sleeve 3 and prevent the sleeve 3 from sinking under the sea floor.
Alternatively, the diameter of the outer circumferential surface of the anti-settling plate 31 is 1.2De to 3 De. Optionally, the bottom area of the anti-sinking plate 31 is 0.1 pi De2To 2.5 pi De2. The anti-sinking plate 31 can better play an anti-sinking function by the arrangement, and the sleeve 3 is prevented from sinking under the surface of the sea bed.
It should be noted that, in some embodiments, stones are also thrown on the outer peripheral side of the sleeve 3, a part of the stones are located on the anti-sinking plate 31 to prevent the sleeve 3 from tilting due to seawater impact, and another part of the stones are located on the outer peripheral side of the anti-sinking plate 31, so that due to the action of tide, a scouring pit is easily formed on the sea bed surface around the pile foundation 1, and the part of stones thrown in advance can fall into the scouring pit in an overturning manner, thereby avoiding the enlargement of the scouring pit and enhancing the anti-scouring effect. In addition, when the stone throwing operation is carried out, the sleeve 3 and the anti-sinking plate 31 can also prevent the thrown stone from smashing the pile foundation 1, and the pile foundation has the characteristics of safety and reliability.
For example, the sleeve extends to the lower surface of the anti-sinking plate 31, the soil cutting plate 32 extending in the vertical direction is arranged below the anti-sinking plate 31, the lower end surface of the soil cutting plate 32 is of a blade-shaped structure, so that the soil cutting plate 32 can be conveniently inserted into soil of a sea bed surface, and the lower end surface of the anti-sinking plate 31 is abutted to the upper side of the sea level, therefore, the lower end of the sleeve 3 is fixed by the anti-sinking plate 31 and the soil cutting plate 32, the sleeve 3 can be prevented from shaking, the sleeve 3 can be prevented from being inserted below the sea level, and the energy dissipation nail 2 is ensured to be located above the sea level.
Alternatively, the length of the soil cutting plate 32 in the vertical direction is 0.02De to 0.5De, for example, the length of the soil cutting plate 32 in the vertical direction is 0.02De, 0.1De, 0.3De, 0.4De, 0.5De, or the like. So set up and make soil cutting plate 32 can fix sleeve 3 better, improve sleeve 3's stability.
In some embodiments, the outer circumference of the sleeve 3 is curved in a concave shape in a direction approaching the first portion 11, and the outer diameter of the sleeve 3 increases in a direction approaching the surface of the sea bed. For example, the outer peripheral surface of the sleeve 3 is a curved surface, the outer peripheral surface of the sleeve 3 is recessed toward the direction close to the center line of the sleeve 3, and the cross-sectional area of the sleeve 3 is gradually increased from top to bottom, so that the formation of large vortexes can be reduced, and the anti-scouring capability and the practicability of the offshore wind power anti-scouring device 100 with the energy dissipation nail are further improved.
In some embodiments, the distance from the top end of the sleeve 3 to the surface of the sea bed in the axial direction of the pile foundation 1 is greater than or equal to 0.3 De. For example, the distances from the distal end of the sleeve 3 to the sea floor surface in the vertical direction are 0.3De, 0.4De, 0.5De, and the like. If the distance from the top end of the sleeve 3 to the sea bed surface is too small, the tide directly rushes to the pile foundation 1, and the tide dissipating effect cannot be achieved. Therefore, the sleeve 3 must have a certain length to ensure that the sleeve 3 can dissipate the tidal current to the maximum extent in various conditions such as flood or heavy rain, thereby protecting the pile foundation 1.
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 invention 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 invention.
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 (10)
1. The utility model provides an offshore wind power anti-scouring device with energy dissipation nail which characterized in that includes:
a pile foundation including a first portion and a second portion connected to each other in an axial direction thereof, the second portion being buried in a seabed having a seabed surface above which the first portion is located;
the energy dissipation nail sleeve comprises a sleeve, the sleeve is sleeved on the first portion, the bottom of the sleeve is supported on the seabed surface, energy dissipation nails protruding outwards are arranged on the outer peripheral surface of the sleeve, the ratio of the dimension of the energy dissipation nails in the axial direction of the sleeve to the dimension of the energy dissipation nails in the circumferential direction surrounding the sleeve is greater than or equal to 1/2 and less than or equal to 2, the energy dissipation nails are arranged in the axial direction of the sleeve and/or in the circumferential direction surrounding the sleeve at intervals, the outer diameter of the sleeve is De, and the interval between every two adjacent energy dissipation nails is greater than or equal to 0.25De and less than or equal to 1.0 De.
2. Offshore wind turbine scour protection with energy dissipation spikes according to claim 1, wherein the density of the energy dissipation spikes increases towards the surface of the seabed.
3. Offshore wind power scour protection with energy dissipating pins according to claim 1, wherein the outer circumferential surface of the sleeve comprises a front surface facing in the direction of the current, a back surface opposite the front surface and two side surfaces, the density of the energy dissipating pins distributed over the front surface and the back surface being greater than the density of the energy dissipating pins distributed over the two side surfaces.
4. Offshore wind power scour protection with energy dissipating pins according to claim 1, wherein two adjacent energy dissipating pins in the axial direction of the sleeve are staggered with a distance of 0.25De or more and 1.0De or less in the circumferential direction around the sleeve,
and/or two adjacent energy dissipation nails are staggered in the circumferential direction around the sleeve, and the distance between the two adjacent energy dissipation nails in the axial direction of the sleeve is greater than or equal to 0.1De and smaller than or equal to 0.4 De.
5. An offshore wind power erosion prevention device with energy dissipation pins according to claim 4, wherein the plurality of energy dissipation pins are divided into a plurality of rows, each row of energy dissipation pins comprises a plurality of energy dissipation pins arranged at equal intervals along the axial direction of the sleeve, the plurality of rows of energy dissipation pins are arranged along the circumferential direction of the sleeve, and two adjacent rows of energy dissipation pins are staggered along the circumferential direction of the sleeve.
6. An offshore wind power erosion prevention device with energy dissipation pins according to claim 1, wherein a part of the energy dissipation pins have a different size from the rest of the energy dissipation pins, and the energy dissipation pins having different sizes are alternately arranged on the outer circumferential surface of the sleeve.
7. Offshore wind power scour protection with energy dissipation spikes according to claim 1, wherein the energy dissipation spikes protrude in a first direction orthogonal to the axial direction of the sleeve, the dimension of the energy dissipation spikes in the first direction being the thickness of the energy dissipation spikes, the thickness of the energy dissipation spikes being 0.1 to 0.4 m.
8. Offshore wind power scour protection with energy dissipation nails according to any one of claims 1 to 7, wherein the bottom of the sleeve has a sinkproof extending along the seabed surface, the bottom surface of the sinkproof abutting against the seabed surface,
the bottom of the sleeve is provided with a soil cutting plate extending towards the seabed along the axial direction of the pile foundation, and the bottom end of the soil cutting plate is of a knife-edge structure.
9. An offshore wind turbine erosion protection device with energy dissipating nails according to any one of claims 1 to 7, wherein the outer circumference of the sleeve is curved concave towards the first section, the outer diameter of the sleeve increasing towards the surface of the sea bed.
10. Offshore wind turbine scour protection with energy dissipating pins according to any one of claims 1 to 7, wherein the distance of the top end of the sleeve in the axial direction of the pile foundation to the sea bed surface is equal to or greater than 0.3 De.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111089025.XA CN113774964A (en) | 2021-09-16 | 2021-09-16 | Offshore wind power anti-scouring device with energy dissipation nail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111089025.XA CN113774964A (en) | 2021-09-16 | 2021-09-16 | Offshore wind power anti-scouring device with energy dissipation nail |
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| CN113774964A true CN113774964A (en) | 2021-12-10 |
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| CN202111089025.XA Pending CN113774964A (en) | 2021-09-16 | 2021-09-16 | Offshore wind power anti-scouring device with energy dissipation nail |
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| CN216156661U (en) * | 2021-09-16 | 2022-04-01 | 盛东如东海上风力发电有限责任公司 | Offshore wind power anti-scouring device with energy dissipation nail |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101831891A (en) * | 2010-04-08 | 2010-09-15 | 重庆交通大学 | Hydropower station bank slope and stilling pool combined energy dissipation method |
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| AU2015258319A1 (en) * | 2014-11-21 | 2016-06-09 | Colin Simpson | Erosion prevention arrangement |
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Application publication date: 20211210 |