CN113073672B - Offshore wind turbine composite skirt type foundation structure with active control system and construction method - Google Patents
Offshore wind turbine composite skirt type foundation structure with active control system and construction method Download PDFInfo
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- CN113073672B CN113073672B CN202110255800.8A CN202110255800A CN113073672B CN 113073672 B CN113073672 B CN 113073672B CN 202110255800 A CN202110255800 A CN 202110255800A CN 113073672 B CN113073672 B CN 113073672B
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- 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
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- 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
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/40—Miscellaneous comprising stabilising elements
Abstract
The invention relates to an offshore wind turbine composite skirt type foundation structure with an active control system and a construction method, wherein the offshore wind turbine composite skirt type foundation structure comprises a wind turbine tower barrel, a transition section tower barrel, an inclined leg support and a skirt type suction barrel, wherein a plurality of anchor rods which are uniformly distributed and embedded into a rock layer are arranged on the skirt type suction barrel in the circumferential direction, and prestress is applied to the anchor rods through anchor tensioning devices arranged on the skirt type suction barrel so as to prevent the skirt type suction barrel from inclining; the wind turbine tower is provided with the acceleration sensor and the master control device, wherein the acceleration sensor is used for recording the acceleration of the wind turbine tower and transmitting the signal to the master control device, and the master control device receives the signal and then adjusts the pretension of the anchor rod by controlling the anchoring tensioning device, so that the overall stability of the foundation structure is ensured. According to the invention, through a set of active control technology, the system rigidity and the natural vibration frequency of the fan foundation are adjusted, the efficient and stable grid-connected power generation of the fan under the condition of strong wind is realized, the verticality and the displacement of the fan are corrected in time, and the power generation efficiency of the fan is improved.
Description
Technical Field
The invention relates to the field of offshore wind turbine foundation installation equipment, in particular to an offshore wind turbine composite skirt type foundation structure with an active control system and a construction method.
Background
In recent years, the development of renewable energy has been receiving attention in the face of increasingly severe environmental and resource problems. The traditional fossil energy in the energy consumption of China has large proportion, low energy utilization efficiency and large waste and pollution, so the development of novel renewable energy is particularly urgent, wherein the influence of offshore wind power on the environment is small, the resource utilization rate is high, the technology is relatively mature, and the development is rapid in recent years.
At present, pile foundations are widely adopted as offshore wind turbine foundations, and in seabed with a deep covering layer, the balance of upper load is realized through large size and long burial depth. However, in part of offshore wind power plants in China, geological conditions are complex, the buried depth of the base rock surface is shallow and the foundation rock surface has large fluctuation, and most of covering soil is mucky soil and soft clay, so that the requirement on the bearing performance of a large-diameter single pile of an offshore wind turbine cannot be met. If the design of the rock-socketed pile is adopted, the engineering difficulty of drilling or blasting construction is high, and the cost is greatly increased. Aiming at different sea conditions of the offshore wind turbine, the skirt type suction bucket foundation has better applicability, the material installation cost is lower than that of a pile foundation, and the marine transportation and installation are easy. However, compared with the pile foundation, the skirt type suction bucket foundation is shallow in embedment depth and cannot be embedded into a rock stratum, so that the horizontal bearing capacity and the lateral overturning resistance need to be further improved.
Under the comprehensive effects of environmental load such as long-term stormy waves and currents, environmental corrosion and marine organism adhesion, the plastic deformation of the traditional fixed offshore wind turbine structure is gradually accumulated, and unrecoverable displacement and corners are generated to influence the normal operation of the wind turbine. In addition, the long-term evolution of the foundation structure and the seabed foundation causes the change of the natural vibration frequency of the whole fan structure. Meanwhile, in order to avoid the resonance of the wind turbine, the natural vibration frequency of the wind power foundation must be avoided from 1P frequency (generator rotation frequency) and 3P frequency (wind turbine blade rotation frequency), and the 1P frequency and the 3P frequency are greatly changed by wind power. When wind power is small, the base natural vibration frequency is between 1P frequency and 3P frequency, and the structure is relatively safe; however, when the wind power is large, the 1P frequency is large, or the stiffness of the foundation becomes small under the action of cyclic load, and the natural vibration frequency of the foundation may approach the 1P frequency, resulting in resonance. The traditional fan is changed oar through driftage system and blade for guaranteeing structure safety when strong typhoon crosses the border, reduces self windage and 1P frequency, consequently the unable full power electricity generation of fan or select directly to shut down, leads to aerogenerator work efficiency lower. With the increase of the power of the single machine of the offshore wind turbine and the upsizing of the basic structure, besides the first-order resonance, the condition of high-order frequency resonance also occurs in part of offshore wind turbines, and the allowable frequency range in the basic design of the traditional wind turbine is further reduced. According to the invention, through a set of active control technology, the system rigidity and the natural vibration frequency of the fan foundation are adjusted, the efficient and stable grid-connected power generation of the fan under the condition of strong wind is realized, the verticality and the displacement of the fan are corrected in time, the power generation efficiency of the fan is improved, and the service life of the fan is prolonged.
Based on the situation, the invention provides the offshore wind turbine composite skirt type foundation structure with the active control system and the construction method, and the problems can be effectively solved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an offshore wind turbine composite skirt type foundation structure with an active control system and a construction method. Aiming at the geological conditions of a soft bearing stratum and a shallow covering layer, the anchor rods and the rock-socketed anchoring ends around the foundation provide tension in an inclined direction, the load transmitted by the upper part of the fan is balanced, and the large-diameter rock-socketed single pile operation is not required to be carried out. In the invention, the vertical force borne by the skirt type suction barrel is mainly borne by the soft soil layer, and the horizontal load is borne by the surrounding soil body, the anchor rod and the rock-socketed anchoring end thereof.
In order to solve the technical problems, the invention is realized by the following technical scheme:
in a first aspect, the invention provides an offshore wind turbine composite skirt type foundation structure with an active control system, which comprises a wind turbine tower, a transition section tower, an inclined leg support and a skirt type suction barrel which are sequentially connected from top to bottom, wherein a plurality of anchor rods which are uniformly distributed and embedded into a rock layer are circumferentially arranged on the skirt type suction barrel, and prestress is applied to the anchor rods through anchor tensioning devices arranged on the skirt type suction barrel so as to prevent the skirt type suction barrel from inclining; the wind turbine tower is provided with an acceleration sensor and a main control device, wherein the acceleration sensor is used for recording the acceleration of the wind turbine tower and transmitting the signal to the main control device, and the main control device receives the signal and then adjusts the pretension of the anchor rod by controlling the anchoring and tensioning device, so that the overall stability of the foundation structure is ensured.
As a preferable technical scheme of the invention, negative pressure electromagnetic valves are symmetrically arranged at the top of the skirt type suction bucket, and the skirt type suction bucket is penetrated into a soft soil layer by applying negative pressure through installing a barge.
As a preferred technical scheme of the invention, the anchor rods are arranged in a central symmetry mode by using the central point of the skirt type suction barrel, and a fixed included angle is formed between each anchor rod and the skirt type suction barrel.
As a preferable technical scheme of the invention, the end part of each anchor rod embedded in the rock layer is grouted to form a rock embedding anchoring end.
As a preferred technical scheme of the present invention, the anchor rods and the inclined leg supports are arranged in a one-to-one correspondence, and projections of the correspondingly arranged anchor rods and the inclined leg supports on a horizontal plane are on the same straight line.
The anchor tensioning device comprises an anchor for connecting the anchor rod and a tensioning device for adjusting the prestress of the anchor rod, and the anchor tensioning device is controlled by a main control device and used for adjusting the pretension of the anchor rod.
As a preferred technical scheme of the invention, a plurality of acceleration sensors are arranged at intervals along the height direction of the wind turbine tower and are used for recording the acceleration of the wind turbine tower at different positions.
As a preferred technical scheme of the invention, the transition section tower drum and the fan tower drum are fixedly connected through a foundation top flange.
In a second aspect, the present invention provides a construction method for an offshore wind turbine composite skirt type foundation structure with an active control system, the construction method comprising the steps of:
the self-weight of the skirt type suction bucket sinks: installing a barge to hoist the skirt type suction bucket to the seabed level of a specified position, connecting a negative pressure electromagnetic valve with a vacuum pump of the barge, opening the negative pressure electromagnetic valve, and penetrating into a soft soil layer by means of the self weight of the skirt type suction bucket;
skirt suction bucket negative pressure is penetrated: after the skirt type suction barrel is stably penetrated by the dead weight, starting a vacuum pump to apply negative pressure, gradually increasing the negative pressure in the skirt type suction barrel, maintaining the negative pressure for a period of time to ensure that the skirt type suction barrel is penetrated to a specified depth, and closing a negative pressure electromagnetic valve;
drilling grouting and anchor rod implanting: drilling a rock layer by using drilling equipment, implanting an anchor rod into the drilling position, embedding deep bedrock with higher bearing capacity, and then injecting a high-strength grouting material to fill a gap so as to form a rock-embedded anchoring end;
anchor rod connection and prestressing force application: after the rock-socketed anchoring end and the skirt type suction barrel are installed, the anchor rod is fixedly installed on the skirt type suction barrel through the anchoring tensioning device, the relative positions of the anchor rod and the skirt type suction barrel are adjusted, and the anchoring tensioning device which is symmetrically distributed is used for applying prestress of the anchor rod to ensure that the horizontal stress of the skirt type suction barrel is balanced;
Hoisting and fixing a fan: hoisting a tower drum of the offshore wind turbine by using a barge, centering the tower drum with a transition section tower drum, and fixing the transition section tower drum and the wind turbine tower drum together by using a foundation top flange through anchor bolts;
the active control of the fan: the wind and wave load and the working frequency of the fan of the wind power plant are monitored through the acceleration sensor, proper foundation rigidity and natural vibration frequency are determined, the anchoring tensioning device at the top of the skirt type suction bucket is actively controlled and adjusted through the main control equipment, and the stability of the whole structure is guaranteed.
As a preferred technical scheme of the invention, a counterweight can be added at the top of the skirt type suction bucket to increase the penetration speed and depth of the skirt type suction bucket in the self-weight sinking process.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. compared with the prior art, the invention has wider application range and is convenient for construction and installation. According to the invention, through a set of active control technology, the system rigidity and the natural vibration frequency of the fan foundation are adjusted, the halt or half-power generation of the traditional fan under the condition of strong wind is avoided, the efficient and stable grid-connected power generation of the fan is realized, the verticality and the displacement of the fan are corrected in time, the power generation efficiency of the fan is improved, and the service life of the fan is prolonged.
2. The invention researches an offshore wind turbine combined foundation with a skirt type suction barrel and anchor rods, and aims at the sea condition that bedrock is buried in a shallow depth, the skirt type suction barrel is not required to be integrally embedded into a bedrock surface, and the anchor rods and the rock embedding anchoring ends around the foundation are used for providing inclined tension so as to balance the load transmitted by the upper part of a wind turbine and the load of an offshore environment.
3. In the invention, the vertical force born by the skirt type suction bucket is mainly born by the soft soil layer, and the horizontal load born by the skirt type suction bucket is balanced by the counter force of the surrounding soil body and the tension of anchor rods and rock-socketed anchoring ends thereof in different directions.
4. The skirt type suction bucket avoids the integral embedding of the submarine bedrock, and increases the horizontal bearing capacity and the integral stability by adding the anchor rods and the embedded anchoring ends.
5. The combined foundation designed by the invention integrates the advantages of two types of foundation types, namely the skirt type suction bucket and the anchor rod, the skirt type suction bucket is simple in stress, stable in bearing capacity, convenient to construct and install, higher in rigidity, and good stability of the upper structure of the offshore wind turbine is guaranteed. Meanwhile, the anchor rod can be drilled into deep bedrock through the offshore drilling machine and anchored in the bedrock through grouting, the anchor rod and the rock-socketed anchoring end are adopted to increase the level and the uplift bearing capacity of the foundation, the problem that a large-diameter single pile needs to be embedded and fixed in a hard rock layer in a shallow soil layer sea condition is avoided, the level bearing capacity and the anti-overturning capacity of the skirt type suction bucket foundation are improved, the construction difficulty and the engineering cost can be effectively reduced, and the structural safety of an offshore wind turbine is guaranteed.
Drawings
FIG. 1 is a schematic view of an apparatus of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a partial schematic view of the apparatus of the present invention.
In the figure: 1. the device comprises a fan tower barrel 1-1, a main control device 1-2, an acceleration sensor 2, a transition section tower barrel 3, an inclined leg support 4, a skirt type suction barrel 4-1, a negative pressure electromagnetic valve 4-2, an anchoring tensioning device 5, an anchor rod 6 and a rock embedding anchoring end.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.
The invention will be further illustrated with reference to the following figures 1-3 and examples, without however being restricted thereto.
As shown in fig. 1, the offshore wind turbine composite skirt foundation structure with an active control system according to this embodiment mainly includes six parts, i.e., a wind turbine tower 1, a transition section tower 2, an inclined leg support 3, a skirt suction bucket 4, an anchor rod 5, and a rock-socketed anchoring end 6. The foundation top flange is used for fixing the fan tower barrel 1, is fixed in a bolt or welding mode, transmits upper load and maintains the structural stability of the fan; the skirt type suction bucket 4 is a main stress facility, the vertical force borne by the skirt type suction bucket is transmitted to the surrounding soil body and a rock layer at the end part of the foundation, and the horizontal load is transmitted to the soil body and the anchor rod 5; the inclined leg support 3, the anchor rod 5 and the rock-socketed anchoring end 6 are auxiliary facilities of the fan combined foundation and are used for keeping the skirt type suction bucket 4 and the upper structure thereof stable and bearing horizontal and vertical loads.
As shown in fig. 1, acceleration sensors 1-2 are respectively mounted at the top, the middle and the bottom of a fan tower cylinder 1 and used for recording the acceleration of the fan tower cylinder 1 at different positions, so as to identify the multistage vibration mode and the frequency of the whole structure, meanwhile, a main control device 1-1 is mounted in the tower cylinder, and the rigidity and the natural frequency of a system are controlled by adjusting the pretension of an anchor rod 5, so that the efficient and stable grid-connected power generation of a fan under the condition of strong wind is realized, and the verticality and the displacement of the fan are corrected in time.
As shown in fig. 1 and 2, the transition section tower barrel 2 is used for connecting and fixing the skirt type suction barrel 4 and the fan tower barrel 1, the transition section tower barrel 2 is fixed at the top of the skirt type suction barrel 4 through four symmetrically distributed inclined leg supports 3, the angle between the inclined leg supports 3 and the anchor rod 5 is close to 180 degrees, and load can be better transferred.
As shown in figure 2, the arrangement mode of the anchor rods 5 and the rock-socketed anchoring ends 6 can be observed from the top view of the rock-socketed anchor rod, in figure 2, the four inclined leg supports 3, the anchor rods 5 and the rock-socketed anchoring ends 6 thereof are uniformly distributed along a foundation at an included angle of 90 degrees, and the top views of the four inclined leg supports 3, the anchor rods 5 and the rock-socketed anchoring ends 6 thereof are on the same straight line, so that the structure can be guaranteed to efficiently and stably transmit load. In actual working conditions, the inclined leg supports 3 and the number and the positions of the anchor rods 5 can be adjusted according to ocean currents and wind power, and the stability of the upper structure is ensured.
As shown in fig. 3, the skirt-type suction bucket of the present invention comprises three parts: the device comprises a negative pressure electromagnetic valve 4-1, an anchoring tensioning device 4-2 and a skirt type suction barrel 4, wherein the anchoring tensioning device 4-2 is installed on the skirt type suction barrel 4 and used for fixing the relative position of an anchor rod 5, load is transmitted to the anchor rod 5 through the tensioning device, prestress is applied, and meanwhile, the length of the anchor rod 5 can be adjusted. In the actual construction process, in order to ensure that the horizontal stress of the skirt type suction barrel 3 is balanced, the two anchor rods 5 in opposite directions need to be simultaneously prestressed, so that the skirt type suction barrel is prevented from inclining, and the prestress of the anchor rods in all directions is determined according to actual engineering. The negative pressure electromagnetic valves 4-1 are arranged at the top of the skirt type suction barrel, and the four valves are distributed in a central symmetry mode and used for controlling the air pressure inside the skirt type suction barrel and filling the skirt type suction barrel into a soft soil layer. In order to increase the structural rigidity and the overall stability of the skirt type suction bucket, the structure is reinforced by adopting a mode of locally welding stiffening ribs, and the mode is shown by dotted lines in the figure.
The invention relates to a construction method of an offshore wind turbine composite skirt type foundation structure with an active control system. The construction and construction steps are as follows:
(1) the self-weight of the skirt type suction bucket sinks: hoisting the skirt type suction bucket to the seabed level of a specified position by using an installation barge, connecting a negative pressure electromagnetic valve 4-1 with a vacuum pump of the barge, opening the negative pressure electromagnetic valve 4-1, and penetrating a soft soil layer by relying on the self weight of the skirt type suction bucket 4, so that a balance weight can be added at the top of the skirt type suction bucket to increase the self weight penetration speed and depth;
(2) skirt suction bucket negative pressure is penetrated: after the self-weight penetration of the skirt type suction bucket is stable, starting a vacuum pump, pumping out the seawater in the skirt type suction bucket, and starting to apply negative pressure; gradually increasing the negative pressure in the skirt type suction barrel, maintaining the negative pressure for a period of time to ensure that the skirt type suction barrel penetrates to a specified depth, and closing the negative pressure electromagnetic valve 4-1;
(3) drilling grouting and anchor rod implanting: the rock stratum is drilled through the drilling equipment, the anchor rod 5 is implanted into the drilling position, deep bedrock with high bearing capacity is embedded, and then high-strength grouting material is injected to fill the gap, so that the rock-embedded anchoring end 6 is formed and is used for bearing the load transmitted by the anchor rod. The skirt type suction barrel is sunk firstly, and then the anchor rod is installed, so that the position of the rock-socketed anchoring end 6 can be accurately positioned;
(4) Anchor rod connection and prestressing force application: after the rock-socketed anchoring end 6 and the skirt type suction barrel 4 are installed, the anchor rod 5 is fixedly installed on the skirt type suction barrel 4 through the anchoring tensioning device 4-2, the relative positions of the anchor rod and the skirt type suction barrel are adjusted, the anchor tensioning device 4-2 which are symmetrically distributed are used for exerting prestress of the anchor rod, the combined foundation can be guaranteed to function well, and the horizontal bearing capacity of the foundation is increased. When the anchoring tensioning device 4-2 is used, prestress is applied to the two anchor rods 5 in the opposite direction, so that the horizontal stress balance of the skirt type suction bucket 4 is ensured, and the skirt type suction bucket is prevented from laterally inclining;
(5) hoisting and fixing a fan: a barge is used for hoisting the tower barrel of the offshore wind turbine and aligning the tower barrel with the transition section tower barrel 2, and the foundation top flange 1 fixes the transition section tower barrel 2 and the wind turbine tower barrel together through anchor bolts.
(6) The active control of the fan: the wind wave load and the working frequency of a fan of a wind power plant are monitored through an acceleration sensor 1-2, proper foundation rigidity and natural vibration frequency are determined, and an anchoring tensioning device 4-2 at the top of a skirt type suction bucket 4 is actively controlled and adjusted through a main control device 1-1. When the wind speed is high on the sea, the pretightening force of the anchor rod is improved, and further the structural natural vibration frequency of the foundation is improved; when the wind speed is at a normal level, the pretightening force of the anchor rod and the natural vibration frequency of the foundation are reduced, and the natural vibration frequency of the foundation is ensured to be between 1P frequency and 3P frequency. When the tower barrel of the wind turbine is inclined and displaced under extreme conditions, the active control technology can be used for correcting the inclination and displacement. Meanwhile, the negative pressure electromagnetic valve 4-1 can work in cooperation with the main control equipment 1-1, and the stability of the whole structure is further ensured.
Technical features (components/elements of the main control device, the acceleration sensor, the negative pressure electromagnetic valve, the anchoring and tensioning device, and the like) of the present invention are all obtained from conventional commercial sources or manufactured by a conventional method, if no special description is made, specific structures, working principles, control modes and spatial arrangement modes which may be involved are all conventional choices in the field, and should not be regarded as innovative points of the present invention, and it is understood by those skilled in the art that the present invention is not specifically described in detail.
Compared with the prior art, the invention combines the advantages of the skirt type suction bucket and the prestressed anchor rod, and the advantages of the skirt type suction bucket are obvious when the skirt type suction bucket foundation is not enough to meet the design requirements especially in the shallow soft soil layer sea area. Meanwhile, the rigidity and the natural vibration frequency of the fan foundation are adjusted through a set of active control technology, and efficient and stable grid-connected power generation of the fan under the condition of strong wind is realized. The vertical force borne by the skirt type suction barrel is mainly borne by a soft soil layer, the horizontal load is borne by the surrounding soil body, the anchor rods and the rock-socketed anchoring ends of the anchor rods, the bearing capacity is stable, and the skirt type suction barrel has larger structural rigidity. This device can be better resist the level and the vertical load that offshore wind turbine superstructure transmitted, effectively improve fan generating efficiency and life, have advantages such as the construction is simple and convenient, extensive applicability.
According to the description of the invention and the attached drawings, a person skilled in the art can easily make or use the offshore wind turbine composite skirt infrastructure with active control system of the invention and can produce the positive effects described in the invention.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are used for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art by referring to the drawings as appropriate.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modifications and equivalent variations of the above embodiment according to the technical spirit of the present invention are within the scope of the present invention.
Claims (8)
1. Offshore wind turbine composite skirt type foundation structure with active control system, this foundation structure support and skirt type suction bucket including the fan tower section of thick bamboo, a changeover portion tower section of thick bamboo, oblique leg that from top to bottom connect gradually, its characterized in that: a plurality of anchor rods which are uniformly distributed and embedded into the rock layer are circumferentially arranged on the skirt type suction barrel, and prestress is applied to the anchor rods through an anchor tensioning device arranged on the skirt type suction barrel so as to prevent the skirt type suction barrel from inclining; the wind turbine tower is provided with an acceleration sensor and a main control device, wherein the acceleration sensor is used for recording the acceleration of the wind turbine tower and transmitting a signal to the main control device, and the main control device receives the signal and then adjusts the pretension of the anchor rod by controlling the anchoring and tensioning device, so that the integral stability of the foundation structure is ensured;
grouting the end parts of the anchor rods embedded into the rock layer to form rock-embedded anchoring ends;
a plurality of acceleration sensors are arranged at intervals along the height direction of the wind turbine tower.
2. The offshore wind turbine composite skirt infrastructure with active control system of claim 1, wherein: negative pressure electromagnetic valves are symmetrically arranged at the top of the skirt type suction bucket, and the skirt type suction bucket is penetrated into a soft soil layer by applying negative pressure through installing a barge.
3. The offshore wind turbine composite skirt infrastructure with active control system of claim 1, wherein: each stock is central symmetry with the central point of skirt suction bucket and arranges to the stock with be fixed contained angle between the skirt suction bucket.
4. The offshore wind turbine composite skirt infrastructure with active control system of claim 1, wherein: the anchor rods and the inclined leg supports are arranged in one-to-one correspondence, and the projections of the anchor rods and the inclined leg supports which are arranged correspondingly on the horizontal plane are on the same straight line.
5. The offshore wind turbine composite skirt infrastructure with active control system of claim 1, wherein: the anchoring and tensioning device comprises an anchorage device used for connecting the anchor rod and a tensioning device used for adjusting the prestress of the anchor rod, and the anchoring and tensioning device is controlled by the main control equipment and used for adjusting the pretension of the anchor rod.
6. The offshore wind turbine composite skirt infrastructure with active control system of claim 1, wherein: the transition section tower barrel is fixedly connected with the fan tower barrel through a foundation top flange.
7. A construction method of the offshore wind turbine composite skirt based structure with the active control system according to any of claims 1 to 6, characterized in that the construction method comprises the following steps:
the self-weight of the skirt type suction bucket sinks: installing a barge to hoist the skirt type suction bucket to the seabed level of a specified position, connecting a negative pressure electromagnetic valve with a vacuum pump of the barge, opening the negative pressure electromagnetic valve, and penetrating into a soft soil layer by means of the self weight of the skirt type suction bucket;
skirt suction bucket negative pressure is penetrated: after the skirt type suction barrel is stably penetrated by the dead weight, starting a vacuum pump to apply negative pressure, gradually increasing the negative pressure in the skirt type suction barrel, maintaining the negative pressure for a period of time to ensure that the skirt type suction barrel is penetrated to a specified depth, and closing a negative pressure electromagnetic valve;
drilling grouting and anchor rod implanting: drilling a rock layer by using drilling equipment, implanting an anchor rod into the drilling position, embedding deep bedrock with higher bearing capacity, and then injecting a high-strength grouting material to fill a gap so as to form a rock-embedded anchoring end;
Anchor rod connection and prestressing force application: after the rock-socketed anchoring end and the skirt type suction barrel are installed, the anchor rod is fixedly installed on the skirt type suction barrel through the anchoring tensioning device, the relative positions of the anchor rod and the skirt type suction barrel are adjusted, and the anchoring tensioning device which is symmetrically distributed is used for applying prestress of the anchor rod to ensure that the horizontal stress of the skirt type suction barrel is balanced;
hoisting and fixing a fan: hoisting a tower drum of the offshore wind turbine by using a barge, centering the tower drum with the transition section tower drum, and fixing the transition section tower drum and the wind turbine tower drum together by using a foundation top flange through anchor bolts;
active control of a fan: the wind and wave load and the working frequency of the fan of the wind power plant are monitored through the acceleration sensor, proper foundation rigidity and natural vibration frequency are determined, the anchoring tensioning device at the top of the skirt type suction bucket is actively controlled and adjusted through the main control equipment, and the stability of the whole structure is guaranteed.
8. The method of constructing an offshore wind turbine composite skirt infrastructure with an active control system according to claim 7, wherein: the top of the skirt type suction barrel is additionally provided with a balance weight so as to increase the penetration speed and depth of the skirt type suction barrel in the self-weight sinking process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110255800.8A CN113073672B (en) | 2021-03-09 | 2021-03-09 | Offshore wind turbine composite skirt type foundation structure with active control system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110255800.8A CN113073672B (en) | 2021-03-09 | 2021-03-09 | Offshore wind turbine composite skirt type foundation structure with active control system and construction method |
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| Publication Number | Publication Date |
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| CN113073672A CN113073672A (en) | 2021-07-06 |
| CN113073672B true CN113073672B (en) | 2022-06-28 |
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| CN114855865B (en) * | 2022-05-20 | 2024-03-29 | 中国电建集团华东勘测设计研究院有限公司 | Tensioning type fan foundation anchored on rock-based seabed and arrangement method |
| CN115404897A (en) * | 2022-10-08 | 2022-11-29 | 中国电建集团成都勘测设计研究院有限公司 | Construction method of marine composite foundation |
| CN115787706B (en) * | 2023-02-03 | 2023-04-07 | 中国船舶重工集团国际工程有限公司 | Corrosion-resistant structure system for base of jacket fan of suction bucket and manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539118A (en) * | 2009-05-08 | 2009-09-23 | 中国海洋大学 | Passive antiscour base of basic structure of gravity-type offshore wind turbine |
| CN101608504A (en) * | 2008-06-16 | 2009-12-23 | 杨建良 | The friendly building that the energy-saving, emission-reducing, environment friendly technology is integrated in one |
| CN105970998A (en) * | 2016-06-16 | 2016-09-28 | 江苏海上龙源风力发电有限公司 | Box type gravitational offshore wind turbine foundation with bulkheads |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608504A (en) * | 2008-06-16 | 2009-12-23 | 杨建良 | The friendly building that the energy-saving, emission-reducing, environment friendly technology is integrated in one |
| CN101539118A (en) * | 2009-05-08 | 2009-09-23 | 中国海洋大学 | Passive antiscour base of basic structure of gravity-type offshore wind turbine |
| CN105970998A (en) * | 2016-06-16 | 2016-09-28 | 江苏海上龙源风力发电有限公司 | Box type gravitational offshore wind turbine foundation with bulkheads |
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