CN111493006B - Device for preventing basic scour by utilizing fishing net in offshore wind farm - Google Patents

Device for preventing basic scour by utilizing fishing net in offshore wind farm Download PDF

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Publication number
CN111493006B
CN111493006B CN202010322342.0A CN202010322342A CN111493006B CN 111493006 B CN111493006 B CN 111493006B CN 202010322342 A CN202010322342 A CN 202010322342A CN 111493006 B CN111493006 B CN 111493006B
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foundation
net
fishing net
fishing
pile
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CN111493006A (en
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朱嵘华
王恒丰
涂智圣
喻旭明
刘寒秋
冯茹鸣
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/10—Culture of aquatic animals of fish
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/44—Foundations for machines, engines or ordnance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/22—Foundations specially adapted for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish
    • 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
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/60—Fishing; Aquaculture; Aquafarming

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Foundations (AREA)

Abstract

The invention discloses a device for preventing a foundation from scouring by utilizing a fishing net in an offshore wind farm: the wind turbine foundation is a single-pile foundation, and the fishing net is arranged around the single-pile foundation. The invention also provides a device for preventing the scouring of the foundation by using the fishing net in the offshore wind farm: the wind turbine foundation is a jacket foundation or a high pile cap foundation, the jacket foundation or the high pile cap foundation comprises a plurality of pile legs, the fishing net comprises a plurality of side fishing nets and a bottom fishing net, the side fishing nets are fixed between two adjacent pile legs through net lacing lines respectively, the bottom fishing net is flatly laid on the contact surface of the jacket foundation or the high pile cap foundation and the seabed, the bottom fishing net is fixed on the seabed in an anchoring mode and is bound with the side fishing nets through the net lacing lines. The device provided by the invention achieves the effect of preventing the erosion of the fan foundation by utilizing the fishing net structure of the offshore wind farm, and reduces the cost of preventing the erosion of the fan foundation.

Description

Device for preventing basic scour by utilizing fishing net in offshore wind farm
Technical Field
The invention relates to the field of offshore wind power engineering, in particular to a device for preventing scouring of a foundation by using a fishing net in an offshore wind power farm.
Background
The offshore wind farm is characterized in that a marine farm and an offshore wind farm are combined, the advantages of the marine farm and the offshore wind farm are taken, and the marine wind farm and the offshore wind farm are developed in a fusion mode. For example, chinese patent publication No. CN107100186A discloses a land-based integrated assembling method for an offshore wind-electricity coupling aquaculture net cage, which comprises the following steps: detecting the depth of the seawater according to the preset building position of the offshore wind driven generator; determining the construction depth of the aquaculture net cage and the height of the aquaculture net cage assembled to a foundation column of the wind driven generator according to the detected seawater depth; according to the determined assembly height, constructing a net cage on the foundation column of the wind driven generator or the foundation column of the wind driven generator and the foundation thereof in a set fixed point and connection mode, and completing land installation and fixation of the culture net cage; and integrally transporting the fan coupled with the aquaculture net cage to a preset position on the sea, and building the foundation column of the wind driven generator with the aquaculture net cage on the seabed.
On the other hand, local scouring of the offshore wind power foundation is a problem in offshore wind power development, the marine meteorological hydrological conditions of the offshore wind turbine are complex and changeable, extreme waves and current sea conditions are frequent, and silt near the pile is easy to start under the combined action of wind, waves and currents of the wind turbine foundation, so that the foundation structure is exposed. On one hand, the bearing capacity and stability of the pile foundation are reduced, and on the other hand, the reduction of the burial depth weakens the lateral constraint of the structure, so that the integral natural vibration frequency is reduced, and the fatigue failure is easier to occur. Therefore, it is necessary to adopt corresponding scour prevention measures, the existing scour prevention measures mainly comprise riprap, sand bags, sand quilts and concrete soft-row scour prevention, the scour prevention cost is extremely high, if the existing fishing nets of the offshore wind farm can be utilized for proper transformation, the scour prevention effect is achieved, the putting amount of scour prevention objects can be reduced, even other scour prevention measures are completely cancelled, and the early-stage investment cost of offshore wind farm construction is greatly reduced.
Disclosure of Invention
The invention discloses a device for preventing scouring of a foundation by using a fishing net of an offshore wind farm, which achieves the effect of preventing scouring of a fan foundation by using a fishing net structure of the offshore wind farm and reduces the cost of preventing scouring of the fan foundation.
The invention provides the following technical scheme:
the utility model provides an utilize marine wind power pasture fishing net to carry out device of basis scour protection, the device includes fan basis and fishing net, the fan basis is the single pile basis, the fishing net is arranged around the single pile basis.
The fishing net is fixed on a single-pile foundation 1-2 meters above the sea level through net ropes.
The method for arranging the fishing net around the single-pile foundation comprises the following steps: cutting a round hole with the diameter equal to the diameter of the single pile in the middle of a fishing net, then sleeving the fishing net into the single pile, stringing the edge of the round hole by a net rope, fixing the round hole at the position 1-2 meters higher than the sea level by the net rope, and fixing the lower edge of the fishing net on the seabed by an anchoring method.
The invention also provides a device for preventing the scouring of the foundation by using the fishing net in the offshore wind farm, which comprises a fan foundation and the fishing net, wherein the fan foundation is a jacket foundation, the jacket foundation comprises a plurality of pile legs, the fishing net comprises a plurality of side fishing nets and a bottom fishing net, the side fishing nets are respectively fixed between two adjacent pile legs by using net ropes, the bottom fishing net is flatly laid on the contact surface of the jacket foundation and the seabed, and the bottom fishing net is fixed on the seabed in an anchoring mode and is mutually bound with the side fishing nets by using the net ropes.
The area of the bottom fishing net is larger than the overlook projection area of the jacket.
The invention also provides a device for preventing the scouring of the foundation by utilizing the fishing net in the offshore wind farm, which comprises a fan foundation and the fishing net, wherein the fan foundation is a high pile cap foundation, the high pile cap foundation comprises a plurality of pile legs, the fishing net comprises a plurality of side fishing nets and a bottom fishing net, the side fishing nets are respectively fixed between two adjacent pile legs by net ropes, the bottom fishing net is flatly laid on the contact surface between the high pile cap foundation and the seabed, and the bottom fishing net is fixed on the seabed in an anchoring mode and is bound with the side fishing nets by net ropes.
The area of the bottom fishing net is larger than the overlooking projection area of the high pile cap foundation.
The local scouring phenomenon can take place for the fan foundation so because wave and rivers are when bypassing the pile structure, under the synergistic action of complicated whirlpool structure around bottom water particle velocity gradient and the pile, bed shear stress increases, make this department silt reach critical starting condition, thereby form obvious towards the hole, and the existence of fishing net can reach choked flow's effect around fan foundation 1, reduce the velocity of flow of near fan foundation 1 rivers, can also play the effect of destroying wake vortex and horseshoe vortex integrality, the bed shear stress has been reduced, thereby can reduce the foundation and erode the hole degree of depth, realize the effect of scouring protection, the cost that is used for scouring protection in the construction of offshore wind-powered electricity generation field has been reduced.
Compared with the traditional method for protecting the foundation of the offshore wind turbine from scouring, the method has the following advantages:
1) the marine ranch is combined with the offshore wind farm, the fishery development space is developed, and the high-quality and multi-production fusion development is realized;
2) the fishing net structure of the offshore wind farm is utilized to achieve the effect of preventing the scour of the fan foundation, and the cost of preventing the scour of the fan foundation is reduced.
Drawings
FIG. 1 is a schematic structural view of an apparatus provided in example 1;
FIG. 2 is a schematic view of the structure of the apparatus provided in example 2;
FIG. 3 is a schematic view of the structure of the apparatus provided in example 3;
FIG. 4 is a schematic view of the structure of the fishing net.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the device that utilizes marine wind power pasture fishing net to carry out basis scour protection that this embodiment provided includes single pile basis 1 and fishing net 2, and fishing net 2 centers on around single pile basis 1, and fishing net 2 covers to the sea bed face from the above certain distance department of high tide position, and fishing net 2 prolongs certain surplus to sea bed face department again, has reached the effect that prevents the fish and flee. The fishing net 2 is fixed on the single-pile foundation 1 which is 1-2 meters higher than the sea level.
As shown in figure 4, the fishing net 2 comprises a net 21, a net edge 22 and a net 23, wherein the net 23 is an 18mm ultrahigh molecular weight polyethylene braided rope.
The method for arranging the fishing net around the single-pile foundation comprises the following steps: a round hole with the diameter equal to that of the single pile 1 is cut in the middle of a fishing net 2, then the fishing net 2 is sleeved into the single pile 1, the edge of the round hole is stringed by a net rope 23, then the round hole is fixed at the position, 1-2 meters above the sea level, of the single pile 1 by the net rope 23, and the lower edge of the fishing net 2 is fixed on the seabed by an anchoring method.
Example 2
As shown in fig. 2, the device for preventing scour of the foundation by using the fishing net in the offshore wind farm provided by the embodiment includes four jacket foundations 1 and fishing nets 2, each fishing net 2 includes four side fishing nets and a bottom fishing net, the side fishing nets are respectively fixed between two adjacent spud legs by net ropes, the bottom fishing net is laid on the contact surface of the jacket foundation 1 and the seabed, and the bottom fishing net is fixed on the seabed in an anchoring manner and is bound with the side fishing nets by the net ropes.
Wherein, the area of the bottom fishing net is larger than the overlooking projection area of the jacket.
Example 3
As shown in fig. 3, the device for preventing scour of the foundation by using the fishing net in the offshore wind farm provided by this embodiment includes an eight-high pile cap foundation 1 and a fishing net 2, the fishing net 2 includes eight pieces of side fishing nets and a bottom fishing net, the side fishing nets are respectively fixed between two adjacent pile legs by net ropes, the bottom fishing net is laid on the contact surface between the eight-high pile cap foundation 1 and the seabed, and the bottom fishing net is fixed on the seabed in an anchoring manner and is bound with the side fishing nets by the net ropes.
Wherein, the area of the bottom fishing net is larger than the overlooking projection area of the eight-high pile cap foundation.
The above-mentioned embodiments are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only the most preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions, equivalents, etc. made within the scope of the principles of the present invention should be included in the scope of the present invention.

Claims (3)

1. A device for preventing scouring of a foundation by utilizing a fishing net in an offshore wind farm is characterized by comprising a fan foundation and the fishing net, wherein the fan foundation is a single-pile foundation, and the fishing net is arranged around the single-pile foundation; the fishing net comprises a net, net edges and net lines; the fishing net is fixed on a single-pile foundation 1-2 meters above the sea level through a net head line, and the lower edge of the fishing net is fixed on the seabed by an anchoring method.
2. A device for preventing scouring of a foundation by utilizing a fishing net in an offshore wind farm is characterized by comprising a fan foundation and a fishing net, wherein the fan foundation is a jacket foundation, the jacket foundation comprises a plurality of pile legs, the fishing net comprises a plurality of side fishing nets and a bottom fishing net, the side fishing nets are respectively fixed between two adjacent pile legs by using net ropes, the bottom fishing net is flatly laid on the contact surface of the jacket foundation and a seabed, and the bottom fishing net is fixed on the seabed in an anchoring mode and is bound with the side fishing nets by using the net ropes; the area of the bottom fishing net is larger than the overlook projection area of the jacket.
3. A device for preventing scouring of a foundation by utilizing a fishing net in a marine wind farm is characterized by comprising a fan foundation and a fishing net, wherein the fan foundation is a high pile cap foundation which comprises a plurality of pile legs, the fishing net comprises a plurality of side fishing nets and a bottom fishing net, the side fishing nets are respectively fixed between two adjacent pile legs by net ropes, the bottom fishing net is flatly laid on the contact surface between the high pile cap foundation and a seabed, and the bottom fishing net is fixed on the seabed in an anchoring mode and is bound with the side fishing nets by net ropes; the area of the bottom fishing net is larger than the overlooking projection area of the high pile cap foundation.
CN202010322342.0A 2020-04-22 2020-04-22 Device for preventing basic scour by utilizing fishing net in offshore wind farm Active CN111493006B (en)

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CN112049147B (en) * 2020-09-14 2021-10-12 浙江大学 Cultivation net cage construction method based on built offshore wind power multi-pile bearing platform foundation
WO2022166535A1 (en) * 2021-02-04 2022-08-11 中国长江三峡集团有限公司 Combined offshore wind power foundation capable of being quickly assembled and preventing scour, and method
CN112942405B (en) * 2021-02-04 2022-06-07 中国长江三峡集团有限公司 Quickly-assembled and anti-scouring combined offshore wind power foundation and method
CN113062345B (en) * 2021-03-27 2021-11-23 华北电力大学 Underwater pile foundation scouring protection device with scouring prevention hole
CN113186967A (en) * 2021-05-18 2021-07-30 华能国际电力江苏能源开发有限公司 Offshore wind power single-pile foundation device capable of preventing scouring
CN113202130A (en) * 2021-06-04 2021-08-03 中国华能集团清洁能源技术研究院有限公司 High-rise-network-format offshore wind power foundation anti-scouring system and method
CN113700047A (en) * 2021-08-30 2021-11-26 舟山市海大科学技术研究院有限责任公司 Scouring protection device for ocean wind power generation single-pile foundation
CN114304026B (en) * 2022-01-13 2022-08-19 中国海洋大学 Offshore wind power scouring pit self-repairing device with micro-ecological breeding function
CN114847207B (en) * 2022-07-08 2022-09-30 浙江大学 Offshore wind power jacket foundation and marine ranching net cage construction method thereof
CN115450820A (en) * 2022-10-13 2022-12-09 上海能源科技发展有限公司 Offshore wind power pile foundation anti-scouring device and method considering wake effect

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EP3228754A1 (en) * 2016-04-05 2017-10-11 SPT Equipment BV Scour protection for suction pile, e.g. pile lowering operated
CN206284122U (en) * 2016-12-23 2017-06-30 马丽萍 A kind of ocean grazing forest
CN207607612U (en) * 2017-11-15 2018-07-13 清华大学深圳研究生院 A kind of offshore floating type Wind turbines and the integration unit of fishery cage culture
CN207897690U (en) * 2018-01-02 2018-09-25 天津大学 A kind of electric hydraulic elevation type aquaculture net cage based on compound bucket foundation
CN108589755A (en) * 2018-04-11 2018-09-28 东海县港慧环保科技有限公司 A kind of Oversea wind power generation Anti-scouring device
DE102018121749A1 (en) * 2018-09-06 2020-03-12 Innogy Se Offshore wind farm system with network
CN110258611A (en) * 2019-06-28 2019-09-20 重庆大学 A kind of offshore wind farm and aquafarm integral structure system
CN110886325A (en) * 2019-10-22 2020-03-17 江苏华蕴海洋科技有限公司 Porous turbulent offshore wind power foundation anti-scouring device and installation method thereof

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