阅读说明：本技术 海上风电防冲刷基础 (Offshore wind power anti-scouring foundation ) 是由 邱旭 张波 刘鑫 薛文超 刘磊 朱宇晨 于 2021-09-16 设计创作，主要内容包括：本发明提供了一种海上风电防冲刷基础,包括桩基础和注浆管,桩基础包括在其长度方向上相连的第一部分和第二部分,第二部分埋入海床中,海床具有海床面,第一部分位于海床面上方。注浆管与第一部分的外周面相连,注浆管从上向下延伸,注浆管的顶部设有灌浆口且其底部设有出浆口,注浆管用于向桩基础附近的海床面上浇灌防冲刷材料以保护桩基础附近的海床面。本发明具有保护桩基础周围的海床,防止桩基础因周围的海床被冲刷侵蚀而失去稳定性的优点。(The invention provides an offshore wind power anti-scouring foundation which comprises a pile foundation and a grouting pipe, wherein the pile foundation comprises a first part and a second part which are connected in the length direction of the pile foundation, the second part is buried in a seabed, the seabed is provided with a seabed surface, and the first part is positioned above the seabed surface. The grouting pipe is connected with the outer peripheral surface of the first part, extends from top to bottom, is provided with a grouting opening at the top and a grout outlet at the bottom, and is used for pouring anti-scouring materials on the sea bed surface near the pile foundation to protect the sea bed surface near the pile foundation. The invention has the advantages of protecting the seabed around the pile foundation and preventing the pile foundation from losing stability due to scouring erosion of the seabed around the pile foundation.)

1. The utility model provides an offshore wind power scour prevention basis which characterized in that includes:

a pile foundation including a first portion and a second portion connected 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 grouting pipe is connected with the outer peripheral face of the first portion, the grouting pipe extends from top to bottom, a grouting opening is formed in the top of the grouting pipe, a grout outlet is formed in the bottom of the grouting pipe, and the grouting pipe is used for pouring anti-scouring materials on the sea bed face near the pile foundation to protect the sea bed face near the pile foundation.

2. An offshore wind power erosion protection foundation according to claim 1, further comprising a cage that is sleeved over and connected to said first section, a plurality of said grouting pipes being connected to said cage so as to be connected to said first section through said cage.

3. An offshore wind power erosion protection foundation according to claim 1, wherein said grouting pipes are plural, said grouting pipes being spaced around said first section.

4. An offshore wind power erosion prevention foundation according to claim 3, wherein the grouting pipes comprise a first grouting pipe and a second grouting pipe, and a distance between the grout outlet of the first grouting pipe and an outer circumferential surface of the first portion is smaller than a distance between the grout outlet of the second grouting pipe and an outer circumferential surface of the first portion.

5. An offshore wind power erosion prevention foundation according to claim 2, wherein said first grouting pipe is plural, said second grouting pipe is plural, and said first grouting pipe and said second grouting pipe are alternately arranged in a circumferential direction of said first section.

6. An offshore wind power erosion protection foundation according to claim 1, wherein the outer diameter of the first section is D and the distance between the grout outlet and the outer peripheral surface of the first section is 0.05D-5D.

7. An offshore wind power erosion protection foundation according to any one of claims 1-6, wherein said grouting pipe comprises a first pipe section extending in the length direction of said pile foundation and a second pipe section connected to the bottom end of said first pipe section and extending away from said first section.

8. An offshore wind power erosion protection foundation according to any one of claims 1-6, wherein the outer diameter of the first section is D and the distance of the slurry outlet in vertical direction to the surface of the sea bed is 0.1D-5D.

9. Offshore wind power erosion protection foundation according to any one of claims 1-6, wherein said grouting opening is located above sea level.

10. Offshore wind power erosion protection foundation according to any one of claims 1-6, characterized in that said erosion protection material is fine-grained concrete.

Technical Field

The invention relates to the technical field of offshore wind power, in particular to an anti-scouring foundation for offshore wind power.

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. 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 foundation which has the advantages of protecting the seabed around the pile foundation and preventing the pile foundation from losing stability due to scouring erosion of the seabed around the pile foundation.

According to the embodiment of the invention, the offshore wind power anti-scouring foundation comprises the following components: a pile foundation including a first portion and a second portion connected 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 grouting pipe is connected with the outer peripheral face of the first portion, the grouting pipe extends from top to bottom, a grouting opening is formed in the top of the grouting pipe, a grout outlet is formed in the bottom of the grouting pipe, and the grouting pipe is used for pouring anti-scouring materials on the sea bed face near the pile foundation to protect the sea bed face near the pile foundation.

In some embodiments, the offshore wind power anti-scour foundation further comprises a cage, the cage is sleeved on the first portion and connected with the first portion, and the grouting pipes are connected with the cage so as to be connected with the first portion through the cage.

In some embodiments, the plurality of grout tubes is spaced around the first portion.

In some embodiments, the grout pipe includes a first grout pipe and a second grout pipe, and a distance between the grout outlet of the first grout pipe and an outer circumferential surface of the first portion is smaller than a distance between the grout outlet of the second grout pipe and an outer circumferential surface of the first portion.

In some embodiments, the first grouting pipe is provided in plurality, the second grouting pipe is provided in plurality, and the first grouting pipe and the second grouting pipe are alternately arranged in a circumferential direction of the first portion.

In some embodiments, the outer diameter of the first part is D, and the distance between the slurry outlet and the outer peripheral surface of the first part is 0.05D-5D.

In some embodiments, the grout pipe comprises a first pipe section extending along the length of the pile foundation and a second pipe section connected to the bottom end of the first pipe section and extending away from the first portion.

In some embodiments, the first portion has an outer diameter D, and the slurry outlet is vertically spaced from the surface of the sea bed by a distance of 0.1D to 5D.

In some embodiments, the grout port is located above sea level.

In some embodiments, the erosion-resistant material is fine-grained concrete.

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

FIG. 1 is a schematic diagram of an offshore wind power erosion prevention foundation according to an embodiment of the invention;

FIG. 2 is a schematic diagram of an offshore wind power erosion prevention foundation according to another embodiment;

fig. 3 is a top view of the offshore wind turbine erosion prevention foundation of fig. 2.

Reference numerals:

pile foundations 1; a first portion 11; a second portion 12; a grouting pipe 2; a first grout pipe 201; a second grout pipe 202; a first tube section 21; a second tube segment 22; a grout port 23; a slurry outlet 24; a cage 3; sea bed surface 4.

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.

As shown in fig. 1, an embodiment of the present invention provides an offshore wind power anti-erosion foundation, which includes a pile foundation 1 and a grouting pipe 2.

The pile foundation 1 comprises a first part 11 and a second part 12 which are connected in the length direction, the second part 12 is buried in the seabed, the seabed is provided with a seabed surface 4, and the first part 11 is positioned above the seabed surface 4;

specifically, the pile foundation 1 is cylindrical, the pile foundation 1 extends in the up-down direction, the length direction is the up-down direction, the second part 12 is located at the lower end of the second part 12, the second part 12 is a part of the pile foundation 1 extending into the lower side of the seabed surface 4, and the first part 11 is a part of the pile foundation 1 above the sea level.

The grouting pipe 2 is connected with the outer peripheral surface of the first part 11, the grouting pipe 2 extends from top to bottom, a grouting opening 23 is formed in the top of the grouting pipe 2, a grout outlet 24 is formed in the bottom of the grouting pipe, and the grouting pipe 2 is used for pouring anti-scouring materials on the seabed surface 4 near the pile foundation 1 to protect the seabed surface 4 near the pile foundation 1.

Specifically, the plurality of grouting pipes 2 are arranged along the circumference of the outer circumferential surface of the first portion 11. The grouting pipe 2 is a hollow round pipe, a grouting opening 23 is formed at the upper end of the grouting pipe 2, and a grout outlet 24 is formed at the lower end of the grouting pipe 2. Thereby, the erosion-preventing material can enter the grout pipe 2 from the grout outlet 23 and flow out of the grout pipe 2 from the grout outlet 24.

In some embodiments, the offshore wind power anti-scour foundation further comprises a cage 3, the cage 3 is sleeved on the first portion 11 and connected with the first portion 11, and the plurality of grouting pipes 2 are connected with the cage 3 so as to be connected with the first portion 11 through the cage 3.

Specifically, the cage 3 is provided on the outer peripheral side of the first portion 11, and the cage 3 extends in the up-down direction. The cage 3 comprises two circular rings and a plurality of connecting rods, the circular rings extend along the outer periphery of the first part 11, and the two circular rings are arranged in parallel at intervals; the plurality of connecting rods extend along the up-down direction, are arranged at equal intervals along the circumference of the first part 11, are arranged between the two circular rings, and are respectively connected with the two circular rings at the upper end and the lower end. The inner side of the injection pipe 2 is thereby connected to the outer edge of the ring, and the shroud 3 fixes the outlet 24 to the outside of the first part 11.

In some embodiments, the plurality of grout tubes 2 is provided, and the plurality of grout tubes 2 are spaced around the first portion 11.

Specifically, there are four grouting pipes 2, and a plurality of grouting pipes 2 are circumferentially arranged at equal intervals along the outer circumferential side of the first portion 11, that is, the plurality of grouting pipes 2 are circumferentially arrayed along the central axis of the first portion 11. It should be noted that the plurality of grouting pipes 2 are arranged at equally spaced circumferential positions along the outer circumferential side of the first portion 11, and the plurality of grouting pipes 2 are also arranged at equally spaced circumferential positions along the outer circumferential side of the first portion 11 in the extending direction. Thereby, a plurality of grouting pipes 2 arranged uniformly can feed the erosion preventing material uniformly around the pile foundation 1.

In some embodiments, the grouting pipe 2 includes a first grouting pipe 201 and a second grouting pipe 202, and a distance between the grout outlet 24 of the first grouting pipe 201 and the outer circumferential surface of the first portion 11 is smaller than a distance between the grout outlet 24 of the second grouting pipe 202 and the outer circumferential surface of the first portion 11.

Specifically, as shown in fig. 2 and 3, the upper half of the grouting pipe 2 extends in the vertical up-down direction, and the lower half of the grouting pipe 2 extends while being bent away from the first portion 11. So that the outlet 24 at the lower end of the grouting pipe 2 is distant from the outer circumferential surface of the first part 11, i.e. there is a distance between the outlet 24 at the lower end of the grouting pipe 2 and the outer circumferential surface of the first part 11. The distance between the grout outlet 24 at the lower end of the first grout pipe 201 and the outer circumferential surface of the first part 11 is smaller than the distance between the grout outlet 24 at the lower end of the second grout pipe 202 and the outer circumferential surface of the first part 11. That is, the lower half of the first grout pipe 201 is bent less than the lower half of the second grout pipe 202.

In some embodiments, the first grouting pipe 201 is plural, the second grouting pipe 202 is plural, and the first grouting pipe 201 and the second grouting pipe 202 are alternately arranged in the circumferential direction of the first portion 11.

Specifically, as shown in fig. 2, there are two first grout pipes 201 and two second grout pipes 202. The first grouting pipes 201 and the second grouting pipes 202 are alternately arranged at intervals of 90 ° in the outer circumference of the first part 11, that is, two first grouting pipes 201 are respectively arranged at the front and rear sides of the first part 11, and two second grouting pipes 202 are respectively arranged at the left and right sides of the first part 11.

In some embodiments, the outer diameter of the first portion 11 is D, and the distance between the slurry outlet 24 and the outer peripheral surface of the first portion 11 is 0.05D-5D. Alternatively, the distance between the grout outlet 24 and the outer circumferential surface of the first portion 11 is any one of 0.05D, 1.0D, 2.0D, 3.0D, 4.0D, and 5.0D.

Specifically, the distance between the slurry outlet 24 and the outer peripheral surface of the first portion 11 is the distance between the geometric center of the outermost end of the slurry outlet 24 and the outer peripheral surface of the first portion 11. Thus, the distance between the grout outlet 24 and the outer peripheral surface of the first portion 11 is the distance from the pile foundation 1 when the erosion preventing material falls.

In some embodiments, the grouting pipe 2 comprises a first pipe section 21 and a second pipe section 22, the first pipe section 21 extending in the length direction of the pile foundation 1, and the second pipe section 22 being connected to the bottom end of the first pipe section 21 and extending away from the first part 11.

Specifically, the first pipe section 21 is disposed at the upper end of the second pipe section 22, the first pipe section 21 extends in the vertical up-down direction, and the second pipe section 22 is bent and tilted in a direction away from the first portion 11. The second pipe section 22 can thereby bring the scour protection material in the first pipe section 21 to a position at a distance from the pile foundation 1.

In some embodiments, the first section 11 has an outer diameter D and the slurry outlet 24 is vertically spaced from the surface of the sea bed by a distance of 0.1D to 5D. Optionally, the distance between the slurry outlet 24 and the surface of the seabed is any one of 0.1D, 1.0D, 2.0D, 3.0D, 4.0D, and 5.0D.

In some embodiments, grout port 23 is located above sea level.

Specifically, grout hole 23 is located the upside of the highest sea level position of offshore wind power scour prevention basic position, can directly follow grout hole 23 and pour the scour prevention material into slip casting pipe 2.

In some embodiments, the erosion-resistant material is fine-grained concrete.

In particular, the fine aggregate concrete can effectively reduce the probability that the erosion resistant material is rolled up by the water flow. Thereby effectively protecting the seabed and 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.