CN119392748A - A wind power tower beach foundation and construction method thereof - Google Patents
A wind power tower beach foundation and construction method thereof Download PDFInfo
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- CN119392748A CN119392748A CN202510003063.0A CN202510003063A CN119392748A CN 119392748 A CN119392748 A CN 119392748A CN 202510003063 A CN202510003063 A CN 202510003063A CN 119392748 A CN119392748 A CN 119392748A
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- 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
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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
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- 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
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
- F03D13/112—Assembly of wind motors; Arrangements for erecting wind motors of towers; of masts
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- 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
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
- F03D13/126—Offshore
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- 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
- F03D13/201—Towers
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- 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
- F03D13/256—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation on a floating support, i.e. floating wind motors
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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
- Y02E10/72—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
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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a wind power tower drum beach foundation and a construction method thereof, and relates to the field of wind power facilities. The wind power tower cylinder foundation that falls includes first tower cylinder, second tower cylinder, base and regulating part, and first tower cylinder slides and disposes the one end of keeping away from the base at the second tower cylinder, and the regulating part is installed in the second tower cylinder. The wind power generation device comprises a base, a first tower, a second tower and a windmill, wherein the first tower, the second tower and the windmill are assembled at the upper end of the base, the first tower and the second tower are arranged in a sliding mode, the first tower and the windmill are connected together to serve as a moving part, the base and the second tower are fixedly connected, the base and the second tower are used as a foundation part for fixing a falling beach, the first tower is driven by an adjusting piece to slide relative to the second tower so as to lift or subside the windmill, and therefore the height of the first tower and the height of the windmill are flexibly adjusted and changed.
Description
Technical Field
The invention relates to the field of wind power facilities, in particular to a wind power tower drum beach foundation and a construction method thereof.
Background
Due to the stability of sea wind resources and the advantages of large power generation, offshore wind power has become one of important technologies for reducing carbon emission in energy production links, has the characteristic of being highly dependent on technology driving, and has the condition of being used as a core power supply to promote global low-carbon economic development.
The wind power tower drum is used as a tower pole foundation for wind power facility power generation, mainly plays a supporting role in a wind power generator set, and can play a role in absorbing vibration of the wind power generator set. At present, the offshore wind power tower in the shallow sea area is constructed and assembled by adopting a high-pile cap foundation, and the construction difficulty of the structural form is high, the manufacturing cost is high, and the whole construction period is long. In the related art, the offshore wind power tower in the shallow sea area can be designed with a self-lifting system, but the offshore wind power tower can only realize single self-lifting, and because the self-lifting tension is provided by the prestress inhaul cable, the inhaul cable has higher requirements, the actual lifting system has complex operation and large workload, and the wind power facility height is difficult to reasonably adjust according to the change of the ocean environment.
Disclosure of Invention
The invention provides a beach foundation of a wind power tower, which comprises a first tower, a second tower, a base and an adjusting piece, wherein the first tower is provided with a connecting side and an installing side, the connecting side of the first tower is in limit connection with the second tower, the installing side of the first tower is suitable for being connected with a windmill;
the adjusting piece is suitable for driving the first tower barrel to slide relative to the second tower barrel so as to lift the action windmill or subside the action windmill.
As an optimized technical scheme, the adjusting piece is arranged into an air bag structure, the air bag structure is arranged at the bottom of the first tower, the base is provided with a circulation structure, and the circulation structure is suitable for communicating the inner cavity of the second tower with the external seawater environment;
the air bag structure is inflated after water is met, so that the first tower can slide upwards relative to the second tower under the action of expanding and supporting, and the air bag structure is deflated after water is removed, so that the first tower can slide downwards relative to the second tower under the action of dead weight.
As the preferable technical scheme, the base comprises a bulkhead structure and a floating plate, wherein at least one cabin body is jointly configured with the floating plate by the bulkhead structure, a communication hole and a diversion hole are formed in the bulkhead structure, the cabin body and the inner cavity of the second tower barrel are communicated and arranged by the communication hole, and the cabin body and the external seawater environment are communicated and arranged by the diversion hole.
As the preferable technical scheme, the bulkhead structure comprises a connecting section, a transition section and a side wall section, wherein the connecting section is fixedly connected with the second tower barrel, the transition section is connected between the connecting section and the side wall section, the side wall section is fixedly connected with the floating plate, the communication hole is communicated with the connecting section, at least one communication hole is arranged, the diversion hole is communicated with the side wall section, and at least one diversion hole is arranged.
As an optimized technical scheme, the bulkhead structure further comprises a circular pipe wall structure and a baffle plate, wherein one end of the circular pipe wall structure is penetrated through the connecting section, the other end of the circular pipe wall structure is fixedly connected with the floating plate, a plurality of baffle plates are annularly arranged on the periphery side of the circular pipe wall structure so as to isolate and form a plurality of cabins, the cabins are annularly arranged, any cabin is communicated with the communication hole and the diversion hole, and/or
The connecting section is arranged to be of a circular ring structure, the transition section is arranged to be of a cone cylinder structure, and the side wall section is arranged to be of a circular ring structure.
As a preferable technical scheme, the first tower cylinder comprises a first cylinder body and a first connecting section, the first connecting section is fixedly arranged on one side of the first cylinder body, which is close to the second tower cylinder, and one side of the first cylinder body, which is far away from the second tower cylinder, is connected with the windmill;
The second tower cylinder comprises a second cylinder body and a second connecting section, the second connecting section is fixedly arranged on one side, close to the first tower cylinder, of the second cylinder body, and one side, far away from the first tower cylinder, of the second cylinder body is connected with the base;
The second tower cylinder is sleeved outside the first connecting section, and the second connecting section is arranged on a moving path of the first connecting section along with the sliding of the first tower cylinder so as to stop and limit the first connecting section.
The first connecting section is provided with first prestress holes, the second connecting section is provided with second prestress holes, the number of the first prestress holes is the same as that of the second prestress holes, the first prestress holes and the second prestress holes are suitable for being connected through prestress ribs to fix the first connecting section and the second connecting section, and the first prestress holes and the second prestress holes are coaxially arranged.
As a preferable technical scheme, the first connecting section and the second connecting section are both arranged in an annular structure;
The second tower barrel further comprises stiffening ribs, the stiffening ribs are fixed inside the second barrel, the stiffening ribs are arranged in a plurality, the stiffening ribs extend in the axial direction parallel to the second barrel, and the stiffening ribs and the guiding grooves are correspondingly in sliding configuration.
As a preferable technical scheme, the first cylinder is arranged to be of a tube type structure, and the second cylinder is arranged to be of a cone type structure.
The invention also provides a construction method of the wind power tower drum falling beach foundation, which comprises the following steps:
installing an adjusting piece in the second tower barrel;
the first tower cylinder and the second tower cylinder are connected in a sliding configuration, and the adjusting piece is arranged at the bottom of the first tower cylinder;
mounting a second tower on the base;
mounting the windmill on a first tower;
the first tower cylinder is driven to slide relative to the second tower cylinder through the adjusting piece so as to lift the action windmill or the sedimentation action windmill, and the windmill is adjusted to be positioned at a desired position;
The first tower cylinder and the second tower cylinder are fixed through an anchoring mode so as to fix the position of the windmill.
The technical scheme provided by the invention has the following advantages:
The invention provides a wind power tower falling foundation, which comprises a first tower, a second tower, a base and an adjusting piece, wherein the first tower is provided with a connecting side and an installing side, the connecting side of the first tower is in limit connection with the second tower, the installing side of the first tower is suitable for being connected with a windmill, the second tower is fixedly connected with the base, the first tower is arranged at one end, far away from the base, of the second tower in a sliding manner, the adjusting piece is arranged in the second tower, and the adjusting piece is suitable for driving the first tower to slide relative to the second tower so as to lift or subside the windmill.
The wind power tower drum foundation is characterized in that a first tower drum, a second tower drum and a windmill are assembled at the upper end of a base, the first tower drum and the second tower drum are arranged in a sliding mode, the first tower drum is connected with the windmill, the first tower drum and the windmill are used as a moving part, the base is fixedly connected with the second tower drum, and the base is used as a foundation part for the falling of the beach; the first tower drum is driven by the adjusting piece to slide relative to the second tower drum so as to lift or subside to act on the windmill, so that the height of the first tower drum and the height of the windmill are flexibly adjusted and changed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a wind power tower foundation provided by the invention;
FIG. 2 is a schematic cross-sectional view of a wind power tower foundation provided by the invention;
FIG. 3 is a schematic structural view of a first tower in a wind power tower beach foundation provided by the invention;
FIG. 4 is a schematic cross-sectional view of a first tower in a wind turbine tower beach foundation provided by the present invention;
FIG. 5 is a schematic diagram of a second tower in the wind power tower beach foundation according to the present invention;
FIG. 6 is a schematic cross-sectional view of a second tower in the wind turbine tower beach foundation provided by the present invention;
FIG. 7 is a schematic diagram of a connection between a first tower and a second tower in a wind turbine tower beach foundation according to the present invention;
FIG. 8 is a schematic structural diagram of a wind power tower foundation in top view;
FIG. 9 is a schematic structural view of a base in a wind power tower foundation according to the present invention;
FIG. 10 is a schematic cross-sectional view of a base in a wind turbine tower foundation according to the present invention;
FIG. 11 is a cross-sectional perspective view of a foundation of a wind turbine tower in accordance with the present invention;
FIG. 12 is a schematic diagram of a connection between a second tower and a base in a wind turbine tower beach foundation provided by the present invention;
FIG. 13 is a cross-sectional perspective view of a second tower and foundation in a wind turbine foundation provided by the present invention;
FIG. 14 is a schematic diagram of the connection of an adjusting member in a wind turbine tower foundation according to the present invention;
FIG. 15 is a block diagram of a top view of an adjusting member in a wind turbine foundation provided by the invention;
FIG. 16 is a schematic view of a structure of a wind power tower provided by the invention before the foundation of the wind power tower is self-lifted;
FIG. 17 is a schematic structural diagram of a wind turbine tower after the foundation of the falling beach is self-lifted;
FIG. 18 is a schematic view of an assembly of a wind turbine foundation according to the present invention in a shallow water area;
FIG. 19 is an assembled schematic view of a wind turbine foundation according to the present invention in a deep water area;
reference numerals illustrate:
1-a first tower cylinder, 11-a first cylinder, 12-a first connecting section, 121-a first prestress hole, 122-a guide groove, 2-a second tower cylinder, 21-a second cylinder, 22-a second connecting section, 221-a second prestress hole and 23-a stiffening rib;
3-base, 31-bulkhead structure, 311-connection section, 3111-first communication hole, 3112-second communication hole, 312-transition section, 313-side wall section, 3131-first diversion hole, 3132-second diversion hole, 314-circular tube wall structure, 315-baffle, 32-floating plate, 33-cabin;
4-adjusting parts, 5-prestressed tendons and 6-windmills.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
In order to solve the problems that the existing self-lifting system is complex in structure, only one-time self-lifting can be performed, and the cost of the prestressed cable for providing tension is high, the buoyancy is adopted to replace tension of the cable, so that the self-lifting structure system is simplified, multiple times of self-lifting can be realized, and the prestressed cable structure is omitted.
Referring to fig. 1 to 19, the present embodiment provides a wind power tower beach foundation, which includes a first tower 1, a second tower 2, a base 3 and an adjusting member 4, wherein the first tower 1 has a connection side and an installation side, the connection side of the first tower 1 is in limited connection with the second tower 2, the installation side of the first tower 1 is suitable for being connected with a windmill 6, the second tower 2 is fixedly connected with the base 3, and the first tower 1 is slidably arranged at one end of the second tower 2 far away from the base 3.
In this embodiment the adjusting member 4 is mounted in the second tower 2, the adjusting member 4 being adapted to drive the first tower 1 to slide in relation to the second tower 2 to lift the active windmill 6 or to settle the active windmill 6.
The wind power generation device comprises a base 3, a first tower 1, a second tower 2 and a windmill 6, wherein the first tower 1, the second tower 2 and the windmill 6 are assembled at the upper end of the base 3, the first tower 1 and the second tower 2 are arranged in a sliding mode, the first tower 1 and the windmill 6 are connected and serve as moving parts, the base 3 and the second tower 2 are fixedly connected and serve as basic parts for landing, the first tower 1 is driven by an adjusting part 4 to slide relative to the second tower 2 so as to lift or subside the windmill 6, and therefore the height of the first tower 1 and the height of the windmill 6 are flexibly adjusted and changed.
In some embodiments, referring to fig. 3 to 6, the first tower 1 includes a first cylinder 11 and a first connecting section 12, the first connecting section 12 is fixedly disposed on one side of the first cylinder 11 near the second tower 2, one side of the first cylinder 11 far from the second tower 2 is connected with the windmill 6, the second tower 2 includes a second cylinder 21 and a second connecting section 22, the second connecting section 22 is fixedly disposed on one side of the second cylinder 21 near the first tower 1, one side of the second cylinder 21 far from the first tower 1 is connected with the base 3, and the second tower 2 is sleeved outside the first connecting section 12.
In a specific embodiment, the first tower 1 is provided as an upper steel structure first tower 1, which first tower 1 is prefabricated using a steel structure in order to reduce the weight of the upper first tower 1. In a specific embodiment, the first cylinder 11 is configured as a tubular structure with an outer diameter of 6.5-7.5 m, a height of 40-60m and a thickness of 30-35mm. The first connecting section 12 is provided as an annular calf shank section having an outer diameter of 8.5-9.5m and a thickness of 0.6-0.8 m.
In a specific embodiment, the second tower 2 is a reinforced concrete second tower 2, the second cylinder 21 is a cone-shaped structure, the outer diameter of the upper top surface of the second cylinder is 8000-12000mm, the outer diameter of the lower top surface of the second cylinder is 13000-17000mm, the height of the cone-shaped tower is 60-80m, and the thickness of the second cylinder is 220-280mm. The second connecting section 22 is provided as an annular calf shank section having an inner diameter of 6.5-7.5m and a thickness of 0.6-0.8 m.
The second connecting section 22 is disposed on a moving path of the first connecting section 12 sliding along with the first tower 1 to stop and limit the first connecting section 12.
As a preferred embodiment, referring to fig. 3 to 6, the first connection section 12 is provided with a first pre-stressing hole 121, the second connection section 22 is provided with a second pre-stressing hole 221, the number of the first pre-stressing holes 121 is the same as the number of the second pre-stressing holes 221, the first pre-stressing holes 121 and the second pre-stressing holes 221 are suitable for being connected by the pre-stressing tendons 5 to fix the first connection section 12 and the second connection section 22, and the first pre-stressing holes 121 and the second pre-stressing holes 221 are coaxially arranged. The number of the first prestress holes 121 and the second prestress holes 221 of the first and second connection sections 12 and 22 may be 12, respectively.
As a further embodiment, the first connecting section 12 and the second connecting section 22 are both provided with an annular structure, referring to fig. 3, the first connecting section 12 is provided with a plurality of guide grooves 122, the guide grooves 122 extend along an axial direction parallel to the first connecting section 12, and the guide grooves 122 and the first pre-stress holes 121 are arranged at intervals and avoid.
Referring to fig. 6, the second tower 2 further includes a plurality of stiffening ribs 23, the stiffening ribs 23 are fixed inside the second cylinder 21, the stiffening ribs 23 are disposed in a plurality, the stiffening ribs 23 extend along an axial direction parallel to the second cylinder 21, and the stiffening ribs 23 and the guide grooves 122 are correspondingly slidably disposed. The plurality of guide grooves 122 which are uniformly arranged along the circumferential direction on the first connecting section 12 slide through the stiffening ribs 23 and the guide grooves 122, so that the movement precision of the relative sliding of the first tower 1 and the second tower 2 is enhanced, the stability and the smooth passing capacity of the first tower 1 in the lifting process are ensured, the arrangement of the plurality of stiffening ribs 23 is beneficial to increasing the self strength of the second tower 2, ensuring the structural rigidity and playing a role in firmly supporting the first tower 1 and the windmill 6 connected with the first tower 1.
As a preferred embodiment, the width of the guide groove 122 may be set to 80-120mm, the width of the stiffening rib 23 may be set to 80-120mm, the guide groove 122 and the stiffening rib 23 may be conformally arranged, and the guide groove 122 and the stiffening rib 23 may be correspondingly arranged in four.
For the connection cooperation of the first tower 1 and the second tower 2:
The second connecting section 22 at the upper part of the second tower barrel 2 is in butt joint with the first connecting section 12 at the lower part of the first tower barrel 1, specifically, after the first tower barrel 1 is lifted to a preset position, the first connecting section 12 is arranged at the lower part of the second connecting section 22, the outer diameter of the tubular structure at the upper part of the first tower barrel 1 is equal to the inner diameter of the second connecting section 22 and is 6.5-7.5m, and the outer diameter of the first connecting section 12 is equal to the inner diameter of the conical structure of the second barrel 21 at the position and is 8.5-9.5m, so that the first tower barrel 1 can be wrapped and fixed by the second tower barrel 2. The first pre-stressing holes 121 on the first connecting segment 12 and the second pre-stressing holes 221 on the second connecting segment 22 are in one-to-one correspondence in position and size in the direction parallel to the axial direction, and the second pre-stressing holes 221 of the second connecting segment 22 are in anchoring connection with the first pre-stressing holes 121 of the first connecting segment 12 below through the detachable pre-stressing tendons 5. When the first tower 1 is lifted, the guide grooves 122 of the first connecting section 12 which are uniformly arranged along the circumferential direction form limit fit with the stiffening ribs 23 inside the second tower 2, which is beneficial to enhancing the stability of the first tower 1 in the self-lifting process.
As an exemplary embodiment, the adjusting member 4 is provided with an air bag structure, the air bag structure is arranged at the bottom of the first tower 1, the base 3 is provided with a circulation structure, the circulation structure is suitable for communicating the inner cavity of the second tower 2 with the external seawater environment, the air bag structure is inflated after encountering water to expand and support the first tower 1 to slide upwards relative to the second tower 2, and the air bag structure is deflated after withdrawing water to enable the first tower 1 to slide downwards relative to the second tower 2 under the action of dead weight.
In a specific embodiment, the air bag structure has an air charging and discharging end and a deformation telescopic end, and the air bag structure is provided with an air charging and discharging control system (not shown in the figure), the air charging and discharging control system is arranged at the air charging and discharging end, and the deformation telescopic end is arranged towards the bottom of the first tower 1. The inflation and deflation control system comprises an inflation bottle, a liquid level sensor and an exhaust valve, wherein the inflation bottle inflates the air bag structure, the liquid level sensor is suitable for detecting the water surface liquid level in the second tower drum 2, and the exhaust valve is used for exhausting the air bag structure to the outside.
In a specific embodiment, the balloon structure is provided as a cylindrical balloon, which is arranged coaxially with the second tower 2. Lifting or sedimentation is implemented by the first tower 1 under the action of the telescopic buoyancy of the cylindrical air bag, wherein the diameter of the cylindrical air bag is equal to that of the upper first tower 1, and can be set to be 6.5-7.5 meters.
Because the buoyancy is determined by the gravity of the discharged water, the volume of the fine tower below the sea level is smaller and smaller along with the lifting of the upper fine tower, so that the reduced buoyancy cannot be balanced with the gravity of the fine tower. In order to solve the problem of buoyancy decline in the lifting process, in the lifting process of the first tower 1, the inside of the cylindrical air bag is continuously inflated, so that the height of the cylindrical air bag is consistent with the lifting height of the second tower 2, the total volume of water discharged by the cylindrical air bag and the second tower 2 is kept unchanged, and the buoyancy borne by the first tower 1 is always balanced with the gravity thereof.
As a preferred embodiment, referring to fig. 9, the base 3 includes a bulkhead structure 31 and a floating plate 32, where the bulkhead structure 31 and the floating plate 32 are jointly configured with at least one cabin 33, the bulkhead structure 31 is provided with a communication hole and a diversion hole, the cabin 33 and an inner cavity of the second tower 2 are communicated through the communication hole, and the cabin 33 and an external seawater environment are communicated through the diversion hole.
As a preferred embodiment, referring to fig. 9 and 11, the bulkhead structure 31 includes a coupling section 311, a transition section 312, and a side wall section 313, the coupling section 311 is fixedly connected with the second tower 2, the transition section 312 is connected between the coupling section 311 and the side wall section 313, the side wall section 313 is fixedly connected with the floating plate 32, a communication hole is provided through the coupling section 311, at least one communication hole is provided through the side wall section 313, and at least one flow guiding hole is provided through the side wall section 313.
In some embodiments, the coupling section 311 is provided in a circular ring configuration, the transition section 312 is provided in a conical cylinder configuration, and the sidewall section 313 is provided in a circular ring configuration.
As a preferred embodiment, referring to fig. 10 and 11, the bulkhead structure 31 further includes a circular tube wall structure 314 and a partition 315, wherein one end of the circular tube wall structure 314 is disposed through the connecting section 311, the other end of the circular tube wall structure 314 is fixedly connected to the floating plate 32, the partition 315 is annularly disposed on the outer peripheral side of the circular tube wall structure 314 to isolate and form a plurality of cabins 33, the cabins 33 are annularly disposed, and any cabin 33 is configured with a communication hole and a diversion hole in a communicating manner.
Referring to fig. 10 and 11, six cabins 33 are provided, taking one cabin 33 as an example, a first communication hole 3111 and a second communication hole 3112 which are communicated with the cabin 33 are provided on the connection section 311, a first diversion hole 3131 and a second diversion hole 3132 which are communicated with the cabin 33 are provided on the side wall section 313, namely, two small holes are respectively provided on the connection section 311 at the upper end of each cabin and the side wall section 313 at the side part of each cabin so as to perform water injection and water drainage, and the six cabins are not communicated with each other, in a specific control process, flow valves can be respectively arranged at the first communication hole 3111, the second communication hole 3112 and the first diversion hole 3131 at the second diversion hole 3132 so as to open respective water injection and drainage holes, thereby controlling the flow rate of water entering and exiting from the tower, further controlling the speed of buoyancy change, and finally controlling the self-lifting and self-sinking speeds of the first tower 1.
In some structural embodiments, the communication holes are set to 200-250mm in diameter and the pilot holes are set to 150-200mm in diameter.
In some structural embodiments, the compartments are separated by a spacer 315 having a thickness of 280-320mm, the spacer 315 serving both to separate the compartments and to locally strengthen the foundation.
In some structural embodiments, the outer diameter of the tubular wall structure 314 is set to 6.5-7.5m and the thickness is set to 300-350mm, and the tubular wall structure 314 and the bulkhead structure 315 together form the framework of the bulkhead structure 31 to take charge of the load transferred by the upper tower structure.
In some embodiments, the floating plate 32 is arranged at the bottom of the base 3, the floating plate 32 is radially expanded, the diameter of the floating plate 32 is 35-45 m, and the thickness of the floating plate is 0.8-1.2 m, and the floating plate 32 can provide additional hydrodynamic inertia for the whole beach structure, so that the foundation structure can be kept stable under the flow load and the wave load.
In a specific embodiment, the base 3 is integrally provided as a reinforced concrete structure. The second tower 2 and the base 3 can be connected through a cone-shaped transition section 312, and the connection method specifically adopts wet splicing to ensure the integrity and compactness between the base 3 and the second tower 2 and prevent seawater from penetrating into or exiting from the joint of the second tower 2 and the base 3.
The invention provides a beach foundation of a wind power tower, which comprises the following steps:
When the first tower 1 is required to be lifted upwards, the communication holes and the diversion holes are opened, the hydrostatic balance principle is utilized to enable seawater to flow into the second tower 2, the quantity of the communication holes and the diversion holes can be controlled by controlling the quantity of the base 3 to control the flow rate of water inlet and outlet, when the buoyancy of the first tower 1 in water is equal to the gravity of the first tower 1, the first tower 1 can be lifted upwards slowly, at the moment, the air bag structure at the lower part of the first tower 1 can be inflated for ensuring that the buoyancy of the first tower 1 is unchanged due to the reduction of the buoyancy of the first tower 1, the inflated volume is consistent with the reduced volume of the first tower 1 in water, so that the stress balance of the first tower 1 is ensured, and after the first tower 1 is lifted in place, the detachable prestressed tendons 5 are inserted in the prestressed holes of the first connecting section 12 and the second connecting section 22 for anchoring and fixing.
When the first tower 1 needs to be settled, the prestressed tendons 5 on the first connecting section 12 and the second connecting section 22 can be detached firstly, and then the gas in the air bag structure is discharged and released, so that the buoyancy of the first tower 1 is reduced, and the settlement speed of the first tower 1 can be controlled by controlling the speed of releasing the air in the air bag structure. In the process of lifting and settling the first tower 1, the guide groove 122 and the stiffening rib 23 form an axial limit guide structure, which is beneficial to ensuring the stable lifting of the first tower 1.
In order to solve the problem that the existing high pile cap foundation is not matched with the topography of the shallow sea, the invention adopts a multi-cabin gravity beach type foundation to replace the high pile cap foundation. The multi-cabin gravity beach type foundation has low construction difficulty and good stability, and can remarkably reduce the manufacturing cost of the foundation.
The beach foundation of the wind power tower provided by the invention adopts a beach foundation to replace an offshore high pile cap foundation form, and particularly can adopt buoyancy to construct a self-lifting system, and the purpose of lifting the height of the tower is achieved by replacing the tension of a prestress inhaul cable with the buoyancy.
The wind power tower drum falling foundation provided by the invention can reduce the construction cost of the existing wind power foundation structure, improve the stability of the existing wind power foundation structure, simplify a self-lifting structure system, establish a self-lifting system capable of being circularly obtained for multiple times, and protect the tower drum structure by reducing the height of the tower drum under extreme weather conditions.
Example 2
The embodiment provides a method for constructing a beach foundation of a wind power tower, which comprises the following steps:
an adjusting piece 4 is arranged in the second tower drum 2;
The first tower 1 and the second tower 2 are connected in a sliding configuration, and the adjusting piece 4 is arranged at the bottom of the first tower 1;
mounting the second tower 2 on the base 3;
mounting the windmill 6 on the first tower 1;
The first tower 1 is driven to slide relative to the second tower 2 through the adjusting piece 4 so as to lift the action windmill 6 or the sedimentation action windmill 6, and the windmill 6 is adjusted to be in a desired position;
The first tower 1 and the second tower 2 are fixed by an anchoring manner so as to fix the position of the windmill 6.
In the method for constructing the foundation of the wind power tower, the prefabricated floating plate 32 and the base 3 can be placed on the diving buoy in the shallow water area in the construction stage of the structure. With the casting and floating of the base 3, the first tower 1 can be installed and fixed on the base 3, and then the second tower 2 can be installed and fixed and spliced according to the designed position. After the entire substructure is built, the foundation water ballast is added, dragging the substructure to a deeper assembly area. Finally, the engine compartment and the windmill 6 are installed at the design position of the deepwater zone, and the whole structure is assembled.
According to the construction method provided by the embodiment, the structure of the beach foundation can be prefabricated on the shore, the prestress rib 5 can be tensioned in a proper environment by means of standardized design and modularized manufacturing and by means of a flow production line construction process, and therefore the structure quality is improved, and the safety and the economy of the beach foundation are improved.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
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| CN202510003063.0A CN119392748A (en) | 2025-01-02 | 2025-01-02 | A wind power tower beach foundation and construction method thereof |
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| CN202510003063.0A CN119392748A (en) | 2025-01-02 | 2025-01-02 | A wind power tower beach foundation and construction method thereof |
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