CN220058112U - Single pile foundation protection structure - Google Patents

Abstract

The utility model relates to the technical field of offshore wind power foundation protection, in particular to a single pile foundation protection structure. The single pile foundation protection structure comprises a buffer cylinder body and an anti-scouring cylinder body, wherein the inner ring of the buffer cylinder body is attached to the periphery of the single pile foundation, and the outer ring of the buffer cylinder body is attached to the inner ring of the anti-scouring cylinder body. The single pile foundation protection structure is characterized in that the buffer cylinder body is arranged at the position close to the single pile foundation for buffering, and the scour protection of the single pile foundation is carried out by the scour protection cylinder body of the outer ring, so that the scour protection effect of the single pile foundation protection structure is ensured while the damage of the scour protection cylinder body to the single pile foundation is avoided.

Description

Single pile foundation protection structure

Technical Field

The utility model relates to the technical field of offshore wind power foundation protection, in particular to a single pile foundation protection structure.

Background

Along with the rapid development of offshore wind power development, a large-diameter single pile foundation is widely applied, and when the diameter of the single pile foundation is larger, the pile sinking construction difficulty of the single pile foundation is correspondingly increased, and the scouring condition after pile sinking is also more severe.

Specifically, under the influence of tidal or ocean current, the single pile foundation forms vortex around after pile sinking, and the larger the diameter of the single pile foundation is, the larger the flow blocking area is, and the vortex flow velocity is correspondingly accelerated along with the increase of the flow blocking area. The water flow speed is higher as the water flow is closer to the single pile foundation, so that the sediment scouring is easier to form at the place close to the single pile foundation. The scouring of the sediment not only can reduce the rigidity of the single pile foundation and change the self-vibration frequency of the single pile foundation, but also can reduce the storm resistance of the single pile foundation and even directly lead the single pile foundation to incline. Therefore, in order to ensure long-term stable operation of the single pile foundation, the single pile foundation needs to be scour-proof.

At present, the scour protection of the single pile foundation is mainly implemented by constructing a beach boat, throwing stones around the single pile foundation, and realizing the scour protection of sediment around the single pile foundation by throwing net bags around the single pile foundation. However, the scour protection, on one hand, because the net bag stone must be thrown close to the single pile foundation position in order to ensure the scour protection effect, the net bag stone can damage the single pile foundation; on the other hand, in the construction process of the beach boat, the water surface continuously becomes shallow along with the continuous stone throwing into the water, so that the draft of the beach boat is gradually reduced and finally in a stranded state, and at the moment, the hull of the beach boat is in direct contact with the net bag stone, so that irreversible damage is easily generated to the hull due to large concentrated load, and safety accidents are easily generated in the subsequent use of the beach boat.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a single pile foundation protection structure which does not damage a single pile foundation.

The utility model adopts the following technical scheme:

the utility model provides a single pile foundation protection structure which comprises a buffer cylinder body and an anti-scouring cylinder body, wherein the inner ring of the buffer cylinder body is attached to the periphery of a single pile foundation, and the outer ring of the buffer cylinder body is attached to the inner ring of the anti-scouring cylinder body.

Preferably, the buffer cylinder includes a plurality of buffer layers stacked in order from high to low.

Preferably, the scour protection barrel comprises a major arc barrel section and a minor arc barrel section, wherein the major arc barrel section comprises a plurality of scour protection layers which are stacked in sequence, and the minor arc barrel section comprises a plurality of buffer layers which are stacked in sequence.

Preferably, the central angle of the major arc cylinder section is within 270 degrees, and the major arc cylinder section is higher than the original seabed surface by more than 3 meters.

Preferably, two submarine cables on the single pile foundation are arranged below the inferior arc tube section in a pressure equalizing mode.

Preferably, the scour protection comprises a plurality of stones covered by the net bag, the stones abutting each other.

Preferably, in the two adjacent anti-scouring layers, the overlapping length of the upper stone layer and the lower stone layer is more than 200 mm.

Preferably, the buffer layer comprises a plurality of sand bags filled with sand grains, the plurality of sand bags abutting each other.

Preferably, the tensile strength at the sand bag seam is above 70% of the tensile strength of the fabric used.

Compared with the prior art, the utility model has the beneficial effects that:

the single pile foundation protection structure is characterized in that the buffer cylinder body is arranged at the position close to the single pile foundation for buffering, and the anti-scouring cylinder body of the outer ring is used for anti-scouring protection of the single pile foundation, so that the single pile foundation is prevented from being damaged by the anti-scouring cylinder body, and the anti-scouring effect of the single pile foundation protection structure is ensured.

Drawings

Fig. 1 is a schematic top view of a monopile foundation guard structure in an embodiment of the utility model.

Wherein reference numerals are as follows:

1. buffer cylinder

2. Scour prevention cylinder

21. Major arc section of cylinder

22. Inferior arc section of thick bamboo

3. Single pile foundation

31. Submarine cable

Detailed Description

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present utility model and are not intended to be limiting.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Referring to fig. 1, the embodiment provides a single pile foundation protection structure, which comprises a buffer cylinder 1 and an anti-scouring cylinder 2, wherein the inner ring of the buffer cylinder 1 is attached to the periphery of a single pile foundation 3, and the outer ring of the buffer cylinder 1 is attached to the inner ring of the anti-scouring cylinder 2.

The single pile foundation protection structure of the embodiment is characterized in that the buffer cylinder body 1 is arranged at the position close to the single pile foundation 3 for buffering, and the scour protection of the single pile foundation 3 is carried out by the scour protection cylinder body 2 of the outer ring, so that the scour protection effect of the single pile foundation protection structure is ensured while the damage to the single pile foundation 3 caused by the scour protection cylinder body 2 is avoided.

Preferably, the buffer cylinder 1 includes a plurality of buffer layers stacked in order from high to low. The stacked arrangement of the multiple buffer layers is adopted, so that the height of the buffer cylinder body 1 can be reasonably adjusted, the buffer effect of the buffer cylinder body 1 is ensured, and the construction cost of the buffer cylinder body 1 is reasonably controlled.

Preferably, referring to fig. 1, the scour protection cylinder 2 comprises a major arc cylinder section 21 and a minor arc cylinder section 22, the major arc cylinder section 21 comprising a plurality of scour protection layers stacked in sequence, and the minor arc cylinder section 22 comprising a plurality of buffer layers stacked in sequence. Because the single pile foundation protection structure of the embodiment still needs to be realized through the beach boat during construction, the scour prevention cylinder body 2 is provided with the inferior arc cylinder section 22 which comprises a plurality of buffer layers which are stacked in sequence, thereby being beneficial to avoiding the damage to the hull of the beach boat when the beach boat reaches the stranded state during construction.

Preferably, the central angle of the major arc tube section 21 is within 270 degrees, and the major arc tube section 21 is higher than the original seabed surface by more than 3 meters. Since the anti-scouring function of the anti-scouring cylinder 2 is mainly achieved by the major arc cylinder section 21, in order to ensure the anti-scouring effect of the anti-scouring cylinder 2, it is necessary to ensure that the major arc cylinder section 21 has a sufficient area and height.

Specifically, in the present embodiment, the central angle of the major arc barrel section 21 is 270 °.

Preferably, referring to fig. 1, two sea cables 31 on the mono pile foundation 3 are pressure equalized under the minor arc tube section 22. Due to the buffering effect of the minor arc barrel section 22, the protection of the two sea cables 31 on the single pile foundation 3 is facilitated.

Preferably, the scour protection comprises a plurality of stones covered by the net bag, the stones abutting each other. The stones covered by the net bag are net bag stones in the prior art, and the net bag stones are adopted to design the anti-scouring layer, so that the anti-scouring effect of the anti-scouring barrel 2 is guaranteed.

Preferably, in the two adjacent scour prevention layers, the lap joint length of the upper stone layer and the lower stone layer is more than 200mm so as to ensure the structural stability of the scour prevention layers.

Preferably, the buffer layer comprises a plurality of sand bags filled with sand grains, the plurality of sand bags abutting each other. The setting of a plurality of sand bags can simulate the silt condition of original environment on the one hand, provides good buffer protection to single pile foundation 3 and the beach ship, and on the other hand also can provide certain scour protection effect, cooperates jointly with the string bag stone and realizes the scour protection to single pile foundation 3.

Preferably, the tensile strength of the seam of the sand bag is more than 70% of the tensile strength of the used fabric, so that the sand bag is prevented from being broken due to the flushing of water flow, and the internal sand grains are further wrapped and flow along with the water flow, so that the inferior arc barrel section 22 on the buffer barrel 1 and the anti-flushing barrel 2 is disabled.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (9)

1. The utility model provides a single pile foundation protective structure, its characterized in that includes buffering barrel (1) and scour prevention barrel (2), the inner circle of buffering barrel (1) is laminated with the periphery of single pile foundation (3) mutually, the outer lane of buffering barrel (1) with the inner circle of scour prevention barrel (2) is laminated mutually.

2. The single pile foundation protection structure according to claim 1, characterized in that the buffer cylinder (1) comprises a plurality of buffer layers, which are stacked in sequence from high to low.

3. The single pile foundation protection structure according to claim 1, characterized in that the scour protection cylinder (2) comprises a major arc cylinder section (21) and a minor arc cylinder section (22), the major arc cylinder section (21) comprises a plurality of scour protection layers stacked in sequence, and the minor arc cylinder section (22) comprises a plurality of buffer layers stacked in sequence.

4. A monopile foundation protection structure according to claim 3, wherein the central angle of the major arc tube section (21) is within 270 ° and the major arc tube section (21) is above the original seabed surface by more than 3 meters.

5. A monopile foundation protection structure according to claim 3, wherein two sea cables (31) on the monopile foundation (3) are arranged under the minor arc section (22) at equal pressure.

6. A monopile foundation protection structure as set forth in claim 3 wherein said scour protection includes a plurality of stones covered by a net bag, a plurality of said stones abutting each other.

7. The single pile foundation guard structure of claim 6, wherein in two adjacent layers of said scour protection, the overlap length of the stone of the upper layer with the stone of the next layer is above 200 mm.

8. A monopile foundation guard structure as claimed in claim 2 or claim 3 wherein the buffer layer comprises a plurality of sand filled sand bags, a plurality of said sand bags abutting one another.

9. The monopile foundation protection structure of claim 8, wherein the tensile strength of the sand bag seam is greater than 70% of the tensile strength of the fabric used.