CN114575390B - Offshore wind power single pile scour protection bottom based on junked tires - Google Patents

Abstract

The present invention discloses an offshore wind power monopile anti-scour bottom protection based on waste tires, wherein the monopile foundation is fixedly connected to a base, and an anti-scour bottom protection mechanism is detachably connected above the base and around the monopile foundation; the anti-scour bottom protection mechanism includes a plurality of groups of tires, and adjacent tires are connected to each other through flexible connectors; a plurality of buoyancy rings are arranged circumferentially on the monopile foundation, and an anti-scour net is arranged between each group of buoyancy rings and the base. The present invention adopts easily available waste tires as filler, and is convenient to construct and has low economic cost; the method of staggered superposition of tire strings is adopted to strengthen the connectivity between each monomer component, and ensure the stability of the protective body structure, and at the same time, compared with the traditional block stone bottom protection, the stable weight is increased, and compared with the filling sand quilt and the soft row bottom protection, it is less likely to be damaged and failed, and the stability of the base bed is ensured; it is suitable for the bottom protection repair after the original offshore monopile foundation scour measures fail.

Description

An offshore wind power monopile anti-scour bottom protection based on waste tires

Technical Field

The invention relates to the technical field of offshore wind power, and in particular to an offshore wind power monopile anti-scour bottom protection based on waste tires.

Background technique

The single pile foundation has low cost, simple design, easy construction technology, and has been widely used as the foundation structure of bridge piers, high-pile docks, and offshore wind power. The existence of the single pile foundation affects the surrounding flow field, forming strong turbulent water flow and vortex, causing local scour around the single pile foundation. When the scour depth reaches a certain level, the bearing capacity of the structural foundation decreases, the stability of the single pile foundation will be threatened, and the safety of the buried deep components around the single pile foundation (such as submarine cables) will also be affected. Traditional local scour protection measures around the single pile foundation include riprap, sinking, gabion, bagged sand and other protection measures. These protection measures have been widely used in the anti-scour protection of bridges. However, the block stone bottom protection often requires a large weight of block stone, and the riprap loses its protective effect on the single pile after moving and dispersing; the durability of the filling sand quilt and the soft row bottom protection is short, and it is easy to cause greater scour after damage; the wire gabion has poor protection effect around the single pile when the water depth is large.

Summary of the invention

The purpose of the present invention is to provide an offshore wind power single pile anti-scour bottom protection based on waste tires to solve the problems existing in the above-mentioned prior art, and to provide a single pile anti-scour bottom protection based on waste tires, which has the characteristics of convenient construction, good durability, strong terrain adaptability, waste utilization, low economic cost, etc., and has important engineering practical value.

To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides an offshore wind power monopile anti-scour bottom protection based on waste tires, including a monopile foundation and a base, the monopile foundation is fixedly connected to the base, and an anti-scour bottom protection mechanism is detachably connected above the base and around the monopile foundation; the anti-scour bottom protection mechanism includes several groups of tires, and adjacent tires are connected to each other by flexible connectors; several buoyancy rings are arranged on the circumference of the monopile foundation, and an anti-scour net is provided between each group of buoyancy rings and the base.

Preferably, the tires adjacent to each other in the same horizontal plane are connected to each other by flexible connectors, and the tires adjacent to each other at different heights are connected to each other by flexible connectors and arranged in a staggered manner; and several groups of tires form a circular area with the single pile foundation as the center.

Preferably, the diameter of the tires is 60-150 cm, and the distance between two adjacent groups of tires is the radius of the group of tires close to the monopile foundation.

Preferably, the tires are connected in series via the flexible connector, and the number of the tires connected in series in the same straight line direction on the same horizontal plane is 5-8.

Preferably, no less than three groups of support rods are arranged between the buoyancy ring and the base, one end of each group of support rods is fixedly connected to the buoyancy ring, and the other end of the support rods is fixedly connected to the base.

Preferably, the buoyancy ring comprises two groups of semicircular buoyancy blocks, the two groups of buoyancy blocks are detachably connected, and the connecting parts of the two groups of buoyancy blocks are provided with locking pieces; and the buoyancy ring is circumferentially fixed with a plurality of groups of connecting rings.

Preferably, a side of the anti-scour net close to the buoyancy ring is detachably connected to the connecting ring, and a side of the anti-scour net close to the base is fixedly connected to the base via an anchor.

Preferably, energy-dissipating balls are rotatably connected to the mesh wires of adjacent meshes on the anti-scour net; and energy-dissipating balls are rotatably connected to the flexible connecting pieces between adjacent tires.

Preferably, the energy dissipation ball includes a sphere and a baffle, the sphere is elliptical, a through hole is longitudinally opened on the sphere, the baffle is fixedly arranged on the circumference of the sphere, four groups of baffles are arranged, and the distance between each two adjacent groups of baffles is equal.

Preferably, the flexible connector is a steel wire or a high-strength nylon rope.

The present invention discloses the following technical effects:

(1) The present invention adopts a single pile anti-scour bottom protection based on waste tires, which can use easily available waste tires as filling, is easy to construct, and has low economic cost;

(2) The present invention adopts the method of staggered stacking of tire strings to strengthen the connectivity between the individual components, thereby ensuring the stability of the protective structure. At the same time, compared with the traditional block stone bottom protection, the stable weight is increased, and compared with the sand filling quilt and the soft bottom protection, it is less likely to be damaged and failed, thereby ensuring the stability of the base bed;

(3) The present invention uses a flexible string of waste tires to protect the bottom. After the single pile scouring measures at sea fail, the bottom protection can be repaired according to the changes in the terrain after the scouring to stabilize the structure, and has high applicability.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a schematic diagram of an anti-scour bottom protection structure of the present invention;

FIG2 is a schematic diagram of the positional relationship between the tire and the monopile foundation of the present invention;

FIG3 is a top view of the tire net of the present invention;

FIG4 is a top view of the anti-scour net of the present invention;

FIG5 is a schematic diagram of the position of a single set of anti-scour nets and a single column foundation of the present invention;

FIG6 is a partial enlarged view of A in FIG5 ;

FIG7 is a schematic diagram of the structure of the energy dissipation ball of the present invention;

FIG. 8 is a top view of the buoyancy ring of the present invention.

Among them: 1. Single column foundation; 2. Base; 3. Tire; 4. Anti-scour net; 401. First anti-scour net; 402. Second anti-scour net; 403. Third anti-scour net; 5. Support rod; 6. Anchor; 7. Buoyancy ring; 71. Buoyancy block; 701. First buoyancy ring; 702. Second buoyancy ring; 703. Third buoyancy ring; 8. Flexible connector; 9. Energy dissipation ball; 901. Sphere; 902. Baffle; 903. Through hole; 10. Locking piece; 11. Fixing rod; 12. Net cable.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1:

1-8, this embodiment provides an offshore wind power single pile anti-scour bottom protection based on waste tires, including a single pile foundation 1 and a base 2, the single pile foundation 1 is fixedly connected to the base 2, and an anti-scour bottom protection mechanism is detachably connected above the base 2 and located around the single pile foundation 1; the anti-scour bottom protection mechanism includes a plurality of groups of tires 3, and adjacent tires 3 are connected to each other by flexible connectors 8; a plurality of buoyancy rings 7 are arranged circumferentially of the single pile foundation 1, and an anti-scour net is arranged between each group of buoyancy rings 7 and the base 2. The present invention adopts a single pile anti-scour bottom protection based on waste tires 3, which can use easily available waste tires as filling, is convenient to construct and has low economic cost; the tire string staggered superposition method is adopted to strengthen the connectivity between the individual components, ensure the stability of the protective body structure, and at the same time increase the stable weight compared with the traditional block stone bottom protection, and compared with the filled sand quilt and the soft row bottom protection, the present invention is less likely to be damaged and failed, ensuring the stability of the base bed; the flexible waste tire string bottom protection is adopted, and after the offshore single pile scour measures fail, the bottom protection can be repaired according to the terrain changes after the scour to stabilize the structure, and has high applicability. The anti-scour measures adopt soft connections to avoid the adverse effects of construction on the exposed cables around the single pile foundation 1. At the same time, it can adapt to different foundation types and is suitable for the bottom protection repair after the original offshore single pile foundation 1 scour measures fail. This method is easy to construct and provides an effective solution for the bottom protection of my country's offshore wind power single pile foundation 1.

The flexible connectors 8 are interconnected between the tires 3 adjacent to each other in the same horizontal plane; the flexible connectors 8 are steel wires or high-strength nylon ropes, and the tires 3 adjacent to each other at different heights are interconnected and arranged in a staggered manner through the flexible connectors 8; a plurality of groups of tires 3 form a circular area around the monopile foundation 1 as the center of the circle; the flexible connectors 8 can make the waste tires more resistant to scouring after connection, and can prevent soil loss in the base 2; and the circular protection area can protect the base 2 in time no matter which direction turbulence is formed around the monopile foundation 1; and the device uses waste tires 3 as bottom protection materials. Since the tires 3 are elastic and there are grooves inside the tires 3, the flowing water can be buffered, and there are gaps between the tires 3 of the device, so the water flow passing through the tire net can be guided by the gaps between the tires 3, so that the water flow direction is slowed down on this basis, and the complex turbulence is reduced; the protection of the base 2 and the protection of the cable are improved.

The diameter of the tire 3 is 60-150cm, and the distance between two adjacent groups of tires 3 is the radius of a group of tires 3 close to the monopile foundation 1. The tires 3 are connected in series through flexible connectors 8, and the number of tires 3 connected in series in the same straight line direction on the same horizontal plane is 5-8. From the plane, the bottom protection is mainly arranged within 10m around the monopile structure. From the elevation, the tire strings are staggered and superimposed, and the thickness and elevation are about 50cm higher than the original mud surface, forming a stable anti-scour structure.

There are no less than 3 groups of support rods 5 between the buoyancy ring 7 and the base 2, one end of each group of support rods 5 is fixedly connected to the buoyancy ring 7, and the other end of the support rods 5 is fixedly connected to the base 2; the buoyancy ring 7 includes two groups of semicircular buoyancy blocks 71, the two groups of buoyancy blocks 71 are detachably connected, and the connection parts of the two groups of buoyancy blocks 71 are provided with locking members 10; the buoyancy ring 7 is circumferentially fixed with several groups of connecting rings. The diameter of the buoyancy ring 7 is larger than the diameter of the single pile foundation 1, and due to the support of the support rods 5, the buoyancy ring 7 will not collide with the single pile foundation 1 even when the seawater scouring force is large; the buoyancy ring 7 can be made of compressed foam board, plastic board, or lightweight material. The locking member 10 can be fixed by bolts, nylon rope binding, or mandarin duck buckle. The support rod 5 can be made of steel bars, corrosion-resistant steel pipes, etc. The support rod 5 supports the anti-scouring net, which can ensure that the anti-scouring net will not be greatly sunken when the seawater scours the anti-scouring net, thereby improving the practicality of the anti-scouring net. The buoyancy ring 7 includes a first buoyancy ring 701, a second buoyancy ring 702 and a third buoyancy ring 703, and the anti-scouring net includes a first anti-scouring net 401, a second anti-scouring net 402 and a third anti-scouring net 403, wherein the first buoyancy ring 701 is connected to the first anti-scouring net 401, the second buoyancy ring 702 is connected to the second anti-scouring net 402, and the third buoyancy ring 703 is connected to the third anti-scouring net 403; the three-layer anti-scouring net can effectively play the role of anti-scouring, and the design of the multi-layer anti-scouring net is also conducive to improving the degree of anti-scouring, and the first anti-scouring net 401 is arranged with the most inclination, and the third anti-scouring net 403 has the smallest inclination, but both can withstand different degrees of seawater scouring.

The side of the anti-scour net 4 close to the buoyancy ring 7 is detachably connected to the connecting ring, and the side of the anti-scour net 4 close to the base 2 is fixedly connected to the base 2 through the anchor 6; the energy dissipation ball 9 is rotatably connected to the mesh wire 12 of the adjacent meshes on the anti-scour net 4; the energy dissipation ball 9 is rotatably connected to the flexible connecting piece 8 between the adjacent tires 3. The energy dissipation ball 9 includes a sphere 901 and a baffle 902. The sphere 901 is elliptical, and a through hole 903 is longitudinally opened on the sphere 901. The baffle 902 is fixedly arranged on the circumference of the sphere 901. Four groups of baffles 902 are arranged, and the spacing between each two adjacent groups of baffles 902 is equal. The energy dissipation ball 9 can rotate when seawater flows through the sphere 901. During the rotation, the baffle 902 can dissipate the energy of the washed seawater. Moreover, since the energy dissipation ball 9 is connected to the anti-scouring net, when the seawater scours the anti-scouring net, the anti-scouring net will be deformed. At this time, the rotation direction of the energy dissipation ball 9 will also change accordingly, and the stirring of the water flow will be changed. Therefore, the anti-scouring net equipped with the energy dissipation ball 9 has a better energy dissipation effect. Moreover, the energy dissipation ball 9 is also installed on the flexible connecting member 8 between the tires 3, and its principle is consistent with the above.

Working process: During installation, a tire 3 with a smaller diameter is arranged near the monopile foundation 1, and then extended outward from there. The diameters of the tires 3 are arranged in order from small to large. Adjacent tires 3 are connected with steel wires or high-strength nylon ropes, and are connected in series to form tire chains of different lengths according to the diameters of the tires 3. During construction, the tire chains are arranged around the monopile foundation 1, and tire chains of different heights are arranged side by side in a staggered manner. After being superimposed, the tire chains form a tire net, and a good water-permeable structure is formed between the tire nets.

After installation, from the plane, each string of tires 3 has 5-8 pieces, the diameter of the tire 3 is 60-150cm, the distance between adjacent tires 3 is about the radius of the tire 3, and the total length does not exceed 10m. From the elevation, the tire strings are staggered and stacked, and the thickness is about 50cm higher than the base 2 (original mud surface), forming a stable anti-scour structure; the tires 3 close to the single pile foundation 1 are fixed by the fixing rod 11; the tires 3 of different layers do not need to be connected, and the tires 3 of different layers only need to be overlapped.

After the tires 3 are placed, the anti-scour net is placed; the two matching buoyancy blocks 71 are separated, and then buckled around the single pile foundation 1, one end of the anti-scour net is tied to the connecting ring of the buoyancy ring 7, and the other end of the anti-scour net is connected to the base 2 through the anchor 6. The anchor 6 needs to be inserted into the base 2 from the gap between the tires 3. The contact part of the anti-scour net and the tire 3 can be overlapped or in contact, and no additional fixing parts are required for fixing.

Embodiment 2: The difference between this embodiment and embodiment 1 is that: in this embodiment, the tires 3 at different heights are connected by nylon ropes or steel wires, and the tire 3 nets in the plane close to the base 2 are all fixedly connected to the base 2 by fixing rods 11. At this time, the tires 3 are more fixed and suitable for sea areas with uneven bases 2. By changing the connection method between the tires 3 and the base 2, the practicality of the base 2 can be effectively improved.

In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims (8)

1. An offshore wind power monopile anti-scour protection bottom protection based on waste tires, characterized in that: it comprises a single column foundation (1) and a base (2), the single column foundation (1) is fixedly connected to the base (2), and an anti-scour protection bottom protection mechanism is detachably connected above the base (2) and located around the single column foundation (1); the anti-scour protection bottom protection mechanism comprises a plurality of groups of tires (3), and adjacent tires (3) are connected to each other through flexible connectors (8); the single column foundation (1) is circumferentially arranged with a plurality of buoyancy rings (7), and an anti-scour net (4) is arranged between each group of buoyancy rings (7) and the base (2); Energy dissipation balls (9) are rotatably connected to the mesh wires (12) of adjacent meshes on the anti-scour net (4); energy dissipation balls (9) are rotatably connected to the flexible connecting pieces (8) between each two adjacent groups of tires (3); The energy dissipation ball (9) comprises a sphere (901) and a baffle (902); the sphere (901) is elliptical in shape; a through hole (903) is longitudinally provided on the sphere (901); the baffle (902) is fixedly arranged in the circumferential direction of the sphere (901); four groups of baffles (902) are arranged, and the intervals between two adjacent groups of baffles (902) are equal. 2. According to claim 1, an offshore wind power single pile anti-scour bottom protection based on waste tires is characterized in that: the adjacent tires (3) in the same horizontal plane are connected to each other through flexible connectors (8), and the adjacent tires (3) at different heights are connected to each other through flexible connectors (8) and arranged in a staggered manner; a plurality of groups of tires (3) form a circular area around the single column foundation (1) as the center. 3. An offshore wind power single pile anti-scour bottom protection based on waste tires according to claim 2, characterized in that: the diameter of the tire (3) is 60-150 cm, and the distance between two adjacent groups of tires (3) is the radius of a group of tires (3) close to the single column foundation (1). 4. An offshore wind power monopile anti-scour bottom protection based on waste tires according to claim 2, characterized in that: the tires (3) are connected in series through the flexible connector (8), and the number of the tires (3) connected in series in the same straight line direction on the same horizontal plane is 5-8. 5. The offshore wind power monopile anti-scour bottom protection based on waste tires according to claim 1 is characterized in that: no less than 3 groups of support rods (5) are arranged between the buoyancy ring (7) and the base (2), one end of each group of support rods (5) is fixedly connected to the buoyancy ring (7), and the other end of the support rod (5) is fixedly connected to the base (2). 6. The offshore wind power monopile anti-scour bottom protection based on waste tires according to claim 1 is characterized in that: the buoyancy ring (7) includes two groups of semicircular buoyancy blocks (71), the two groups of buoyancy blocks (71) are detachably connected, and the connecting parts of the two groups of buoyancy blocks (71) are provided with locking pieces (10); the buoyancy ring (7) is fixedly provided with a plurality of groups of connecting rings in the circumferential direction. 7. An offshore wind power monopile anti-scour bottom protection based on waste tires according to claim 6, characterized in that: the side of the anti-scour net (4) close to the buoyancy ring (7) is detachably connected to the connecting ring, and the side of the anti-scour net (4) close to the base (2) is fixedly connected to the base (2) through an anchor (6). 8. The offshore wind power monopile anti-scour bottom protection based on waste tires according to claim 1, characterized in that the flexible connecting member (8) is a steel wire or a nylon rope.