CN214194682U

CN214194682U - A prefabricated offshore wind power foundation anti-scour energy dissipation structure

Info

Publication number: CN214194682U
Application number: CN202023064444.1U
Authority: CN
Inventors: 张二林; 王广原; 吴昊旭; 董海军
Original assignee: Tianjin Water Transport Engineering Survey and Design Institute
Current assignee: Tianjin Water Transport Engineering Survey and Design Institute
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-09-14
Anticipated expiration: 2030-12-18

Abstract

The utility model discloses an assembled offshore wind power basis scour prevention dissipation structure, be equipped with the center that encircles around the single pile basis and detain the annular sphere roof of cover in the center protects a section of thick bamboo outside, the centre of sphere of annular sphere roof is in the structure below, be equipped with the protection pad at center protects a section of thick bamboo inboard, annular sphere roof and center protect a section of thick bamboo upper end fixed, the lower extreme passes through annular bottom plate to be connected, be equipped with radial baffle and circumference baffle in the energy dissipation cavity chamber that constitutes by them, all be equipped with the energy dissipation hole on circumference baffle, radial baffle and annular sphere roof, be fixed with the energy dissipation piece on annular sphere roof; the energy dissipation structure is formed by splicing at least two assembling units, the assembling units are of a reinforced concrete structure, two sides of each assembling unit are respectively provided with a radial partition plate, and a top spherical panel is connected with a hanging ring. The utility model discloses an energy dissipation structure can effectively protect the soil body around the marine wind power basis to the simple installation, the cost is low.

Description

Assembled marine wind power basis scour prevention dissipation structure

Technical Field

The utility model relates to an ocean engineering field, in particular to assembled marine wind power basis scour prevention dissipation structure.

Background

The wind energy is a clean renewable energy source and has quite wide application prospect. After decades of development, the application and development of land wind energy and offshore wind energy have achieved remarkable achievement. Among them, offshore wind power has its unique advantages. The wind power plant is built on the sea, wide space and wind resources which are originally thick on the sea can be utilized, large-scale benefits are achieved, and the cost of wind power generation is reduced. The offshore wind power foundation structure comprises a single-pile foundation, a high-pile cap foundation, a jacket foundation, a tripod foundation, a cylindrical foundation, a floating foundation and the like, wherein the single-pile foundation is the most widely applied foundation form due to the advantages of simple structure and the like. The main problem faced by mono pile foundations in engineering applications is to solve the adverse effects of scour on them.

The soil around the single pile foundation is flushed under the action of waves and ocean currents, and the horizontal bearing capacity of the pile foundation is greatly weakened. Especially for the pile foundation with relatively shallow initial burial depth, the horizontal bearing weakening effect caused by scouring is particularly remarkable. The depth of the pile foundation is reduced by scouring, and meanwhile, the horizontal load acting force arm is increased (namely, the moment load is increased relative to the pile-soil interface), so that the deformation of the pile foundation and the distribution of the acting force between pile soils are influenced. In addition, the scouring will cause a larger area of the pile foundation to be exposed to the seawater environment, increasing the chance of corrosion, which is another major cause of accelerated aging failure of the wind turbine foundation.

At present, three methods are mainly adopted for preventing the erosion of the fan foundation. The first is a traditional riprap structure, the construction of the method is simple, but the scour prevention effect is often poor due to poor riprap grading; the second type is sand quilt and sand bag, which have poor durability; the third is sludge solidification, which achieves the purpose of scour prevention by changing the properties of the sludge, but this way will kill benthic organisms, destroy the environment, and the durability of which is yet to be tested by engineering.

Therefore, the scouring-prevention energy dissipation device for the offshore wind power foundation is needed to be invented, so that the soil around the offshore wind power foundation can be effectively protected for a long time, and the economy and the installation convenience can be guaranteed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the technical problem who exists among the known art and provide an assembled marine wind power basis scour prevention dissipation structure, this structure can effectively protect the soil body around the marine wind power basis to the simple installation, the cost is low.

The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: an anti-scouring energy dissipation structure of an assembled offshore wind power foundation is provided with a central pile casing surrounding a single pile foundation and an annular spherical top plate buckled and sleeved on the outer side of the central pile casing, the center of a sphere of the annular spherical top plate is arranged below the energy dissipation structure, a protection pad is arranged on the inner side of the central pile casing, the annular spherical top plate and the upper end of the central pile casing are fixed, the lower end of the central pile casing is connected through an annular bottom plate, a radial partition plate and a circumferential partition plate are arranged in an energy dissipation cavity formed by the annular bottom plate, the annular spherical top plate and the central pile casing, energy dissipation holes are formed in the circumferential partition plate, the radial partition plate and the annular spherical top plate, and energy dissipation blocks are fixed on the annular spherical top plate; the energy dissipation structure is formed by splicing at least two assembling units which are uniformly distributed along the circumferential direction, the assembling units are of a reinforced concrete structure, two sides of each assembling unit are respectively provided with one radial partition plate, and a top spherical panel of each assembling unit is connected with a hanging ring.

The upper end tangent direction of the annular spherical top plate is horizontal, and the included angle between the lower end of the annular spherical top plate and the seabed is 120-150 degrees.

The outer diameter of the lower end of the annular spherical top plate is 2-5 times of the diameter of a pile foundation, and the vertical height of the annular spherical top plate is 2-5 meters.

The energy dissipation block is a cube reinforced concrete block with the side length of 0.1-0.3 m.

The utility model has the advantages and positive effects that: through setting up the energy dissipation cavity to set up the circumference baffle and the radial baffle that have the energy dissipation hole in the energy dissipation cavity and combine energy dissipation piece on the annular sphere roof and energy dissipation hole to carry out the dissipation of wave energy, can effectively protect the soil body around the pile foundation, avoid erodeing. By adopting the structure that the assembly units are used for hoisting and splicing, the site construction is convenient, the efficiency is high, the working time can be saved, and the cost is reduced; the assembly unit is prefabricated on land, and the manufacturing is convenient, the efficiency is high, and the quality is convenient to guarantee.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a longitudinal sectional view of the middle portion of FIG. 1;

fig. 4 is a bottom view of the assembly unit of the present invention with the bottom plate removed;

fig. 5 is a plan view of the assembly unit of the present invention.

In the figure: 1. annular spherical top plate, 2 energy dissipation holes, 3 energy dissipation blocks, 4 hanging rings, 5 radial partition plates, 6 circumferential partition plates, 7 central protective cylinders, 8 protective pads, 9 annular bottom plates, 10 single-pile foundations.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified in conjunction with the accompanying drawings as follows:

referring to fig. 1 to 5, an anti-scouring energy dissipation structure for an assembled offshore wind power foundation is provided with a central pile casing 7 surrounding a single pile foundation and an annular spherical top plate 1 buckled and sleeved outside the central pile casing 7, wherein the spherical center of the annular spherical top plate 1 is below the energy dissipation structure, a protection pad 8 is arranged inside the central pile casing 7, and the protection pad 8 is usually made of a rubber plate and used for protecting a pile foundation 10 from being collided by the energy dissipation structure. The upper ends of the annular spherical top plate 1 and the central protective cylinder 7 are fixed, the lower ends of the annular spherical top plate and the central protective cylinder are connected through an annular bottom plate 9, a radial partition plate 5 and a circumferential partition plate 6 are arranged in an energy dissipation cavity formed by the annular bottom plate 9, the annular spherical top plate 1 and the central protective cylinder 7, energy dissipation holes 2 are formed in the circumferential partition plate 6, the radial partition plate 5 and the annular spherical top plate 1, and energy dissipation blocks 3 are fixed on the annular spherical top plate 1.

The energy dissipation structure is formed by splicing at least two assembling units which are uniformly distributed along the circumferential direction, each assembling unit is of a reinforced concrete structure, two radial partition plates 5 are arranged on two sides of each assembling unit, two adjacent assembling units are convenient to connect, and a lifting ring 4 is connected to a spherical top plate of each assembling unit.

The number of the assembly units is determined according to factors such as the size of an on-site energy dissipation structure, the lifting capacity of lifting equipment and the like.

In this embodiment, it is recommended that the tangential direction of the upper end of the annular spherical top plate 1 is horizontal, and the included angle between the lower end and the seabed is 120-150 °. The outer diameter of the lower end of the annular spherical top plate 1 is recommended to be 2-5 times of the diameter of a pile foundation, and the vertical height is 2-5 m. The energy dissipation block 3 is recommended to be a square reinforced concrete block with the side length of 0.1-0.3 m. The energy dissipation holes 2 are round holes with the radius of 0.1-0.2 m. The thickness of the circumferential partition plate 6, the radial partition plate 5, the annular spherical top plate 1, the radial partition plate 5, the circumferential partition plate 6 and the protection pad 8 is 0.1-0.2 m.

The installation method of the anti-scouring energy dissipation structure of the fabricated offshore wind power foundation comprises the following steps: the assembly unit is prefabricated on land and then transported to a fan site through a ship; broken stones are paved in the area where the energy dissipation structures are arranged around the single-pile foundation 10 to level the sea bottom surface, the offshore hoisting equipment is adopted to hoist the assembly units to complete assembly, and then broken stone protection feet are paved on the outer side of the lower end of the annular spherical top plate 1.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.

Claims

1. a prefabricated offshore wind power foundation anti-scour energy dissipation structure, is characterized in that, this energy dissipation structure is provided with the central protective tube that surrounds the single pile foundation and the annular spherical top plate buckled on the outside of the described central protective tube, The spherical center of the annular spherical top plate is below the energy dissipating structure, and a protective pad is arranged on the inner side of the central protective cylinder. The energy dissipation chamber formed by the annular bottom plate, the annular spherical top plate and the central shield is provided with a radial partition plate and a circumferential partition plate. The annular spherical top plate is provided with energy dissipation holes, and energy dissipation blocks are fixed on the annular spherical top plate;

The energy dissipation structure is formed by splicing assembly units with at least two petals equally divided along the circumferential direction. The assembly unit adopts a steel-concrete structure, and a radial partition is provided on each side of the assembly unit. A lifting ring is connected to the spherical top plate of the assembling unit.

2 . The prefabricated offshore wind power foundation anti-scour energy dissipation structure according to claim 1 , wherein the tangential direction of the upper end of the annular spherical roof is horizontal, and the angle between the lower end and the seabed is 120°-150°. 3 .

3. The prefabricated offshore wind power foundation anti-scour energy dissipation structure according to claim 1, wherein the outer diameter of the lower end of the annular spherical roof is 2 to 5 times the diameter of the pile foundation, and the vertical height is 2 to 5 meters .

4 . The prefabricated offshore wind power foundation anti-scour energy dissipation structure according to claim 1 , wherein the energy dissipation block is a cube reinforced concrete block with a side length of 0.1-0.3 meters. 5 .