CN114293584A - Offshore wind power damping energy consumption single pile foundation and construction method thereof - Google Patents
Offshore wind power damping energy consumption single pile foundation and construction method thereof Download PDFInfo
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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Abstract
The invention provides an offshore wind power damping energy consumption single-pile foundation and a construction method thereof, wherein the offshore wind power damping energy consumption single-pile foundation comprises a single-pile foundation body and an inserting section, wherein the inserting section is inserted into an offshore soil body; the shock absorption and energy dissipation device sleeved on the insertion section comprises a cylindrical shell, wherein the inner wall of the cylindrical shell is provided with a plurality of groups of elastic parts, the plurality of groups of elastic parts are distributed along the axial direction of the cylindrical shell, each group of elastic parts is distributed along the cross section of the cylindrical shell in an annular shape, one end of each elastic part is connected with the inner wall of the cylindrical shell, the other end of each elastic part is contacted with the outer wall of the insertion section, and the elastic parts can elastically deform along the radial direction of the cylindrical shell; the cylindrical shell is internally provided with a damping component inserted into the upper end of the cylindrical shell, so that the upper end of the cylindrical shell is closed. The invention fully utilizes the elastic component and the damping component for shock absorption and energy dissipation, optimizes the stress of the body inserted into the soil body section, ensures that the stress is more reasonable, plays a role in protecting the body, avoids the body from directly acting with the ocean soil body, generates the separation of the body and the soil body, and simultaneously slows down the erosion of ocean currents.
Description
Technical Field
The invention relates to the field of offshore wind power, in particular to an offshore wind power damping energy consumption single pile foundation and a construction method.
Background
The offshore wind energy has the advantages of rich resources, stable wind speed, small negative influence on the environment, large installed capacity, no occupation of cultivated land and the like, and is one of the key new energy sources for development of various countries. The offshore wind power generation is vigorously developed, and renewable generated energy is provided for national power grids, so that a large amount of fossil energy is saved for the country, the emission of a large amount of harmful substances and carbon dioxide is reduced, and the environmental pollution and the greenhouse effect are reduced.
The offshore wind power foundation supports the upper structure, bears offshore strong wind load, seawater corrosion and wave impact, and has the advantages of complex structure, high technical requirement and high construction cost compared with the structure on land. Among them, the single pile foundation has been most widely used due to its relatively low cost, but it has been still insufficient in terms of reducing the wave impact. Therefore, the development of an effective and durable offshore wind power single pile foundation is of great significance.
The major diameter single pile foundation is the mainstream of the offshore wind power foundation, and has convenient construction and better economic benefit. The mono-pile foundation still has problems in mitigating wave impact, especially in deep water sea areas. The problems restricting the wider application of the single-pile foundation mainly include: the single pile foundation needs to have larger bearing capacity and anti-skid and anti-overturning stability; when the construction ship is used for pile sinking construction, the verticality of a single pile is difficult to control due to the influence of waves, sea wind and the like; the soil around the pile is seriously washed by the ocean, so that the stability is reduced and the inclination of the pile is promoted to cause accidents.
According to the retrieval discovery, the Chinese patent with the application number of 201310420301.5 provides an offshore wind power single-pile foundation wave current excitation reducing method, a movable vibration damping device is arranged outside the wall surface of a single-pile foundation, the wing-shaped wall surface with a short head and a long tail is adopted to smooth the wave current and improve the flow state, various hydrodynamic excitation is reduced from the vibration source, and meanwhile, viscoelastic damping materials are adopted to separate and absorb the transmitted load, so that the aim of reducing the vibration of the pile foundation is fulfilled. The vibration damper is a hollow columnar structure with an equal cross section and plane symmetry, is sleeved on a single pile foundation and consists of a supporting component, a damping component and a balance water tank from inside to outside. Through changing the weight of the water body in the balance water tank, the relative position of the adjusting device and the water surface is adjusted, under the combined action of gravity and buoyancy, the vibration damping device automatically ascends and descends along with the change of the water level, and is always in the main excitation area of the wave flow, under the combined action of the head pressure and the tail suction of the wing-shaped overflowing wall surface, the vibration damping device can flexibly follow the change of the wave flow direction, the head and the tail of the wing-shaped overflowing wall surface are always consistent with the wave flow direction, and the vibration damping function is exerted all the time.
However, the 201310420301.5 patent has the following disadvantages: (1) the main structure is a balance water tank, and the height of the filled water body needs to be adjusted according to waves and tide to play a good vibration reduction role. However, the actual marine hydrodynamic environment is extremely complex and constantly changes, the wave and tidal current phenomena are irregular, the actual application is difficult to ensure that the balance water tank is accurately positioned in the main wave and tidal current excitation area, and the damping effect is difficult to achieve the expected effect; (2) the wing section wall surface with short head and long tail is difficult to process, and the installation difficulty is increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an offshore wind power damping energy consumption single pile foundation and a construction method thereof.
In a first aspect of the present invention, an offshore wind power damping energy consumption single pile foundation is provided, including:
a mono-pile foundation body including an insertion section for insertion into a marine soil mass;
the shock absorption and energy dissipation device is sleeved on the insertion section;
wherein, the energy absorber includes:
a cylindrical housing into which the insertion section is inserted; a plurality of groups of elastic components are arranged on the inner wall of the cylindrical shell, the elastic components are distributed along the axial direction of the cylindrical shell, each group of elastic components are distributed along the cross section of the cylindrical shell in an annular shape, one end of each elastic component is welded with the inner wall of the cylindrical shell, the other end of each elastic component is in contact with the outer wall of the insertion section, and the elastic components can elastically deform along the radial direction of the cylindrical shell;
and the damping component is arranged between the upper end of the cylindrical shell and the single-pile foundation body, so that the upper end of the cylindrical shell and the single-pile foundation body are closed.
Preferably, the damping member is a damping ring, wherein:
the inner diameter of the damping ring is matched with the outer diameter of the insertion section, so that the damping ring can be sleeved on the outer wall of the insertion section;
the outer diameter of the damping ring is matched with the inner diameter of the upper end of the cylindrical shell, so that the damping ring can be positioned between the insertion section and the cylindrical shell to form a closed structure.
Preferably, the lower end of the insertion section is a tapered portion, and the large end of the tapered portion is connected with the lower end of the cylindrical shell.
Preferably, the bottom of the insertion section is spherical surface rubber. The lower extreme of tube-shape shell is filled concrete, and the upper surface that the concrete was filled is spherical surface, with the spherical surface phase-match of the bottom of inserting the section contacts.
Preferably, the single-pile foundation body is a steel hollow cylinder.
In a second aspect of the present invention, a construction method of the offshore wind power damping energy consumption single pile foundation is provided, including:
prefabricating a single pile foundation body and a damping and energy dissipating device;
installing the single-pile foundation body and the shock absorption and energy dissipation device into an integral foundation structure: inserting the insertion end of the single-pile foundation body into the cylindrical shell of the shock absorption and energy dissipation device, enabling the outer wall of the insertion end to abut against the elastic component in the cylindrical shell, inserting the damping component into the upper end of the cylindrical shell, and sealing the upper end of the cylindrical shell;
and hoisting the integral foundation structure, and sinking the insertion end and the cylindrical shell to a preset depth of the marine soil body by utilizing the self weight of the integral foundation structure and the power ballast action of a pile driver.
Compared with the prior art, the embodiment of the invention has at least one of the following beneficial effects:
according to the offshore wind power damping energy dissipation single-pile foundation, the cylindrical shell with the elastic component and the damping component arranged inside is sleeved outside the insertion end of the single-pile foundation body, so that the shock absorption and energy dissipation are well realized, the integral structure is simple, the installation and processing difficulty is low, and the offshore wind power damping energy dissipation single-pile foundation is particularly suitable for large-diameter single-pile foundations, especially in deep sea areas.
According to the offshore wind power damping energy dissipation single-pile foundation, the stress condition of the single-pile foundation body inserted into the soil body section is optimized by using the elastic component and the damping component for damping and energy dissipation, so that the stress is more reasonable, the single-pile foundation body is protected, the single-pile foundation body is prevented from directly acting with a marine soil body, the phenomenon that the single-pile foundation body is separated from the soil body is avoided, the scouring effect of ocean currents is reduced, the load uncertainty of an upper structure borne by the single-pile foundation of a wind turbine generator is fully considered, and the offshore wind power damping energy dissipation single-pile foundation can be suitable for a more severe marine environment.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of an offshore wind power damping and energy dissipating single-pile foundation according to a preferred embodiment of the invention;
FIG. 2 is a cross-sectional view of an offshore wind power damping and energy dissipating mono-pile foundation according to a preferred embodiment of the present invention;
FIG. 3 is a top view of an offshore wind power damping and energy dissipating mono-pile foundation according to a preferred embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an offshore wind power damping and energy dissipating mono-pile foundation according to a preferred embodiment of the invention;
the scores in the figure are indicated as: the single pile foundation comprises a single pile foundation body 1, an insertion section 101, a conical part 102, spherical surface rubber 103, concrete 104, a cylindrical shell 2, an elastic component 3 and a damping component 4.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
The major diameter single pile foundation is the mainstream of offshore wind power foundation, but the single pile foundation still has the problem in the aspect of reducing the wave impact, especially in deep sea areas. The problems restricting the wider application of the single-pile foundation mainly include: the single pile foundation needs to have larger bearing capacity and anti-skid and anti-overturning stability; when the construction ship is used for pile sinking construction, the verticality of a single pile is difficult to control due to the influence of waves, sea wind and the like; the soil around the pile is seriously washed by the ocean, so that the stability is reduced and the inclination of the pile is promoted to cause accidents. In order to solve the problems, the embodiment of the invention provides an offshore wind power damping energy consumption single pile foundation.
Fig. 1 is a schematic structural diagram of an offshore wind power damping energy consumption single pile foundation according to a preferred embodiment of the invention. Referring to fig. 1, the offshore wind power damping energy consumption single pile foundation in the preferred embodiment includes: a single pile foundation body 1 and the shock attenuation energy absorber that sets up on single pile foundation body 1. Specifically, a single-pile foundation body 1 includes an insertion section 101 inserted into the marine soil body, the insertion section 101 is generally located in the lower half portion of the single-pile foundation body 1, and the upper half portion of the single-pile foundation body 1 is a portion located on the marine soil body. The shock absorption and energy dissipation device is sleeved outside the insertion section 101.
As shown in fig. 1, the shock absorbing and energy dissipating device in this embodiment includes: a cylindrical housing 2 and a damping member 4, wherein an insertion section 101 is inserted into the cylindrical housing 2. A plurality of groups of elastic components 3 are arranged on the inner wall of the cylindrical shell 2, the plurality of groups of elastic components 3 are distributed along the axial direction of the cylindrical shell 2, each group of elastic components 3 is distributed along the cross section of the cylindrical shell 2 in an annular shape, one end of each elastic component 3 is welded with the inner wall of the cylindrical shell 2, the other end of each elastic component 3 is in contact with the outer wall of the insertion section 101, and after the cylindrical shell 2 and the insertion section 101 of the single-pile foundation body 1 are installed, the elastic components 3 can elastically deform along the radial direction of the cylindrical shell 2, so that the fixation and the shock absorption between the two are realized; the damping part 4 is arranged between the upper end of the cylindrical shell 2 and the single-pile foundation body 1, so that the upper end of the cylindrical shell 2 and the single-pile foundation body 1 are in a closed state, and the energy dissipation of the damping part 4 is utilized to optimize the stress condition of the single-pile foundation body 1 inserted into an earth section.
The marine wind power damping energy consumption single pile basis of this embodiment, realize the shock attenuation energy dissipation through the specific shock attenuation energy dissipater cooperation damping part 4 of design, promptly, put into tubular shell 2 with traditional single pile basis, and fix with shock attenuation energy dissipater, it is tubular shell 2 actually with the contact of the ocean soil body, dissipate the energy through shock attenuation energy dissipater, thereby reduce the disturbance of tubular shell 2 to the soil body, make the atress more reasonable, thereby play the effect of protection single pile basis body 1. The load uncertainty of the upper structure borne by the single-pile foundation of the wind turbine generator is fully considered, so that the wind turbine generator is suitable for a more severe marine environment.
Referring to fig. 1 and 2, the lower end of the insertion section 101 of the mono pile foundation body 1 is a tapered portion 102, and the large end of the tapered portion 102 is connected to the lower end of the cylindrical shell 2. The conical part 102 can be conveniently inserted into the marine soil body, and the resistance in the insertion process is reduced.
Fig. 2 is a cross-sectional view of an offshore wind power damping and energy dissipating mono-pile foundation according to a preferred embodiment of the invention. Referring to fig. 2, the mono-pile foundation body 1 is a hollow cylinder made of steel. In a preferred embodiment, the bottom of the insertion section 101 is a spherical rubber 103. The lower end of the cylindrical shell 2 is filled with concrete 104, and the upper surface filled with the concrete 104 is a spherical concave surface which is matched and contacted with the spherical surface at the bottom of the insertion section 101. The lower end of the cylindrical shell 2 is filled with concrete 104 to increase the self-weight to improve the stability of the single pile foundation, and the upper surface of the filling of the concrete 104 is also processed into a spherical surface.
In this embodiment, the bottom of the insertion section 101 is spherical rubber 103, wherein the spherical rubber is designed to facilitate the rotation of the bottom of the insertion section 101 caused by the external force acting on the single pile foundation, so as to perform the function similar to "ball joint"; the spherical rubber 103 has good elasticity, can adapt to the rotation of the bottom of the insertion section 101 when being subjected to external force, has good shock insulation effect, can reduce the impact effect of vertical load component and reduce the disturbance to the seabed.
Fig. 3 is a top view of an offshore wind power damping and energy dissipating mono-pile foundation according to a preferred embodiment of the invention. Referring to fig. 3, each group of elastic members 3 includes a plurality of elastic members 3, the plurality of elastic members 3 are uniformly disposed on the circumference of the inner wall of the cylindrical housing 2 at the same horizontal height, and the plurality of groups of elastic members 3 are uniformly spaced in the vertical direction. The elastic member 3 may be a spring.
Fig. 4 is a schematic cross-sectional view of an offshore wind power damping and energy dissipating mono-pile foundation according to a preferred embodiment of the invention. Referring to fig. 4, the damping member 4 may be a damping ring, in which: the inner diameter of the damping ring is matched with the outer diameter of the insertion section 101, so that the damping ring can be sleeved on the outer wall of the insertion section 101; the outer diameter of the damping ring is matched with the inner diameter of the upper end of the cylindrical shell 2, so that the damping ring can be positioned between the insertion section 101 and the cylindrical shell 2 to form a closed structure.
The offshore wind power damping energy dissipation single pile foundation mainly receives horizontal load effects such as wind power, waves and tides for a long time, and effective shock absorption and energy dissipation can be carried out on the horizontal load received by the single pile foundation by arranging a plurality of groups of elastic parts 3 and matching with the damping parts 4 in the embodiment. And the integral structure is simple, the installation and processing difficulty is small, and the method is particularly suitable for large-diameter single-pile foundations, especially in deep sea areas.
In another embodiment, the invention further provides a construction method of the offshore wind power damping energy consumption single pile foundation, which comprises the following steps:
s1, prefabricating the single-pile foundation body 1 and the shock absorption and energy dissipation device;
s2, divide single pile foundation body 1 and shock attenuation energy absorber installation into an integral foundation structure: inserting the insertion end of a single pile foundation body 1 into a cylindrical shell 2 of the shock absorption and energy dissipation device, enabling the outer wall of the insertion end to abut against an elastic component 3 in the cylindrical shell 2, inserting a damping component 4 into the upper end of the cylindrical shell 2, and enabling the upper end of the cylindrical shell 2 to be sealed;
and S3, hoisting the integral foundation structure, and sinking the insertion end and the cylindrical shell 2 to a preset depth of the marine soil body by using the self weight of the integral foundation structure and the power ballast action of the pile driver.
According to the offshore wind power damping energy dissipation single pile foundation in the embodiment of the invention, the tubular shell 2 with the elastic component 3 and the damping component 4 arranged inside is sleeved outside the insertion end of the single pile foundation body 1, and the stress condition of the single pile foundation body 1 inserted into the soil body section is optimized by utilizing the damping energy dissipation of the elastic component 3 and the damping component 4, so that the stress is more reasonable, the single pile foundation body 1 is protected, the single pile foundation body 1 is prevented from directly acting with an ocean soil body, the phenomenon that the foundation of the single pile foundation body 1 is separated from the soil body is avoided, and the ocean current scouring effect is reduced.
Therefore, the invention expands the applicability of the single-pile foundation, so that the single-pile foundation can be suitable for the sea areas with deep overlying sludge layers, serious seabed scouring, shallow bedrock burial depth and other natural conditions, and the working risk of the single-pile foundation under special geological conditions and complex marine environments is greatly reduced. In addition, the design of the invention is more concise.
In the drawings of the above embodiments, like reference numerals represent like parts or equivalent parts, and terms like "upper", "lower", "front", "rear", "left", "right", and the like used in the description are simply referred to with respect to the drawings for convenience of describing the present invention.
All the drawings of the above embodiments are only for convenience of explaining technical contents of the present invention; the numbers, positions of the components, interrelationships between the components, and dimensions of the components used to construct the preferred embodiment do not limit the technical solution itself, but extend to the entire area covered by the technical field.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. The utility model provides an offshore wind power damping power consumption single pile basis which characterized in that includes:
a mono-pile foundation body including an insertion section for insertion into a marine soil mass;
the shock absorption and energy dissipation device is sleeved on the insertion section;
wherein, the energy absorber includes:
a cylindrical housing into which the insertion section is inserted; a plurality of groups of elastic components are arranged on the inner wall of the cylindrical shell, the elastic components are distributed along the axial direction of the cylindrical shell, each group of elastic components are distributed along the cross section of the cylindrical shell in an annular shape, one end of each elastic component is welded with the inner wall of the cylindrical shell, the other end of each elastic component is in contact with the outer wall of the insertion section, and the elastic components can elastically deform along the radial direction of the cylindrical shell;
and the damping component is arranged between the upper end of the cylindrical shell and the single-pile foundation body, so that the upper end of the cylindrical shell and the single-pile foundation body are closed.
2. The offshore wind power damping and energy consumption single pile foundation of claim 1, wherein the cylindrical shell is a hollow steel pipe.
3. Offshore wind power damping energy dissipating mono-pile foundation according to claim 1, characterized in that the damping means is a damping ring, wherein:
the inner diameter of the damping ring is matched with the outer diameter of the insertion section, so that the damping ring can be sleeved on the outer wall of the insertion section;
the outer diameter of the damping ring is matched with the inner diameter of the upper end of the cylindrical shell, so that the damping ring can be positioned between the insertion section and the cylindrical shell to form a closed structure.
4. The offshore wind power damping energy consumption single pile foundation of claim 1, wherein each of the plurality of sets of elastic members comprises a plurality of elastic members, the plurality of elastic members are uniformly arranged on the circumference of the inner wall of the cylindrical shell at the same horizontal height, and the plurality of sets of elastic members are vertically distributed at intervals.
5. The offshore wind power damping energy dissipation monopile foundation of claim 4, wherein the elastic member is a spring.
6. The offshore wind power damping and energy consumption single pile foundation of claim 1, wherein the lower end of the insertion section is a conical portion, and the large end of the conical portion is connected with the lower end of the cylindrical shell.
7. The offshore wind power damping energy dissipation mono-pile foundation of claim 6, wherein the bottom of the insertion section is spherical rubber.
8. The offshore wind power damping energy dissipation mono-pile foundation of claim 7, wherein the lower end of the cylindrical shell is filled with concrete, and the upper surface filled with concrete is a spherical surface which is matched and contacted with the spherical surface at the bottom of the insertion section.
9. An offshore wind power damping and energy dissipating mono-pile foundation according to any one of claims 1 to 8, characterised in that the mono-pile foundation body is a steel hollow cylinder.
10. A construction method of an offshore wind power damping and energy dissipation single pile foundation according to claims 1-9, characterized by comprising:
prefabricating a single pile foundation body and a damping and energy dissipating device;
installing the single-pile foundation body and the shock absorption and energy dissipation device into an integral foundation structure: inserting the insertion end of the single-pile foundation body into the cylindrical shell of the shock absorption and energy dissipation device, enabling the outer wall of the insertion end to abut against the elastic component in the cylindrical shell, inserting the damping component into the upper end of the cylindrical shell, and sealing the upper end of the cylindrical shell;
and hoisting the integral foundation structure, and sinking the insertion end and the cylindrical shell to a preset depth of the marine soil body by utilizing the self weight of the integral foundation structure and the power ballast action of a pile driver.
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| CN202210186294.6A CN114293584B (en) | 2022-02-28 | 2022-02-28 | Offshore wind power damping energy consumption single pile foundation and construction method thereof |
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| CN116240929A (en) * | 2023-04-18 | 2023-06-09 | 重庆大学 | Scour-resistant energy dissipation and ecological protection structure for offshore wind turbine single pile foundation |
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| CN114293584B (en) | 2023-03-14 |
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