CN114960739B - Prestressed foundation structure of wind turbine generator and construction method thereof - Google Patents
Prestressed foundation structure of wind turbine generator and construction method thereof Download PDFInfo
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- CN114960739B CN114960739B CN202210771857.8A CN202210771857A CN114960739B CN 114960739 B CN114960739 B CN 114960739B CN 202210771857 A CN202210771857 A CN 202210771857A CN 114960739 B CN114960739 B CN 114960739B
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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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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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- 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
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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
- Y02E10/728—Onshore wind turbines
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- Civil Engineering (AREA)
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Abstract
The invention discloses a prestress foundation structure of a wind turbine and a construction method thereof, the prestress foundation structure comprises an intermediate cylinder formed by up-and-down assembling a plurality of sub intermediate cylinders, the sub intermediate cylinders comprise an upper connecting ring cylinder, a precast concrete cylinder and a lower connecting ring cylinder, the upper connecting ring cylinder is connected with an upper ring plate provided with a jack, the lower connecting ring cylinder is connected with a lower ring plate provided with an inserting block, the connecting block is connected with a steel wire rope which penetrates through a supporting ring plate and extends out of the precast concrete cylinder, the steel wire rope surrounds the outer wall of a liquid storage ring box for a plurality of circles and then extends into the precast concrete cylinder again and is connected with a baffle plate.
Description
Technical Field
The invention relates to the technical field of wind power equipment foundation structures, in particular to a prestress foundation structure of a wind turbine generator and a construction method thereof.
Background
At present, most of the offshore wind farms in China are built in typhoons in multiple sea areas, the power of the adopted wind generating set is larger and larger, the load magnitude of the high-power wind generating set in the typhoons in multiple areas is huge, the requirements on the rigidity and strength of the foundation are higher, and the increase of the single-machine capacity of the fan and the variety of the geological conditions of the seabed in deep water areas provide new requirements and challenges for the basic structure type of the offshore wind generating set.
In the prior art, a prestress gravity foundation of an offshore wind generating set with a publication number of CN108677992A and an installation method thereof. Comprises a bottom plate, a concrete prefabricated shell and a reinforced ring beam; the concrete precast shell is internally provided with a prestressed duct, prestressed tendons penetrate through the prestressed duct, the lower end of the prestressed tendons are anchored in the bottom plate, and the upper end of the prestressed tendons are anchored in the reinforced ring beam; the internal cavity of the concrete prefabricated shell is filled with ballast filler, the concrete prefabricated shell structure is adopted to carry out post-tensioning prestress tensioning on the shell, so that the strength and rigidity of a gravity foundation are greatly improved, the size and weight of the gravity foundation are remarkably reduced, the seawater corrosion prevention effect is good, steel is saved, the land prefabricated mode is built, the offshore site installation workload is small, the construction time and cost are saved, the whole structure has small wave and ocean current action and low gravity center, and the structure has good stability and can be applied to deep sea areas, high-capacity wind turbines and offshore wind farms with geological conditions of shallow coverage.
However, the prior art still has major drawbacks, such as: the precast concrete shell needs to have higher height so as to extend out of the sea level, so the precast concrete shell has larger dead weight and volume, is difficult to integrally manufacture and transport to an installation position, and adopts the long-length prestressed tendons to integrally apply prestress to the precast concrete shell, so that the prestress applied to the whole precast concrete shell is dispersed and smaller, and the precast concrete shell is difficult to have a stronger compression resistance effect.
Disclosure of Invention
The invention aims to provide a prestress foundation structure of a wind turbine and a construction method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the prestress foundation structure of the wind turbine comprises an upper end fixedly connected with a mounting flange and a middle cylinder with a lower end fixedly connected with a concrete slab, wherein the middle cylinder is formed by assembling at least two sub middle cylinders up and down, the sub middle cylinders are integrally cast from top to bottom, an upper connecting ring cylinder, a precast concrete cylinder and a lower connecting ring cylinder are distributed, the precast concrete cylinder for storing ballast filler is of a round platform cylinder structure with a narrow upper part and a wide lower part, the lower connecting ring cylinder of the upper sub middle cylinder is the same as the upper connecting ring cylinder of the lower sub middle cylinder in size, an upper ring plate is fixedly connected to the outer side of the upper connecting ring cylinder, a plurality of jacks which are penetrated up and down are formed in the upper ring plate, a lower ring plate is fixedly connected to the outer side of the lower connecting ring cylinder, and a plurality of inserting blocks which extend into the jacks of the lower sub middle cylinder are fixedly connected to the lower ring plate;
the utility model discloses a concrete prefabricated section of thick bamboo, including prefabricated concrete section of thick bamboo inner wall annular fixedly connected with supports the annular slab, and supports the movable extrusion of annular slab inner wall department and have the connection dog, and connection dog fixedly connected with passes the support annular slab and stretches out the wire rope of prefabricated concrete section of thick bamboo, the jack outside is connected with annular groove, and the annular groove internal fixation is provided with the liquid storage ring case of encircling in the jack outside and inside storage adhesion agent, wire rope stretches out after the prefabricated concrete section of thick bamboo and encircles a plurality of circles of liquid storage ring case outer wall and stretch into the prefabricated concrete section of thick bamboo again, and wire rope stretches into the one end below fixedly connected with baffle of prefabricated concrete section of thick bamboo again.
Preferably, a plurality of puncture blocks with sharp parts are stored in the liquid storage ring box.
Preferably, the prefabricated concrete cylinder outer wall fixedly connected with upwards trompil guide block, and wire rope pass support ring board, prefabricated concrete cylinder and upwards stretch out the guide block and stretch into the annular groove.
Preferably, the support ring plate inner wall department evenly is provided with a plurality of connection dog along its hoop, and arbitrary one connection dog all fixedly connected with stretches out precast concrete section of thick bamboo, encircle the wire rope in the precast concrete section of thick bamboo of stretching into again after a plurality of circles of liquid storage ring case, and wire rope stretches into the one end fixed connection in the precast concrete section of thick bamboo again in same baffle top.
Preferably, the inner wall of the precast concrete cylinder is fixedly connected with at least two supporting ring plates which are distributed at intervals up and down in the circumferential direction, and a steel wire rope which extends out of the precast concrete cylinder and extends into the precast concrete cylinder again after encircling the liquid storage ring box for a plurality of circles passes through any one of the supporting ring plates.
Preferably, the steel wire rope penetrating through the upper supporting annular plate extends downwards in the side wall of the precast concrete cylinder and is fixedly connected with the steel wire rope body penetrating through the lower supporting annular plate and extending into the side wall of the precast concrete cylinder.
Preferably, the outer wall of the insert block is provided with a plurality of concave points.
Preferably, the upper connecting ring barrel of the uppermost terminal middle barrel is fixedly connected with the mounting flange, and the lower connecting ring barrel of the lowermost terminal middle barrel is fixedly connected with the concrete slab.
A construction method is used for the prestress foundation structure of the wind turbine generator, and comprises the following steps:
a, forming a sub-intermediate cylinder embryonic form with an upper connecting ring cylinder, a precast concrete cylinder, a lower connecting ring cylinder, an upper ring plate, a lower ring plate and an inserting block by utilizing casting molding of concrete, and reserving a channel for a steel wire rope to pass through;
b, cutting a jack according to the position of the inserting block, cutting an annular groove on the outer wall of the jack, and fixing the liquid storage annular box on the inner wall of the annular groove;
c, fixing the support ring plate on the inner wall of the precast concrete cylinder, enabling the steel wire rope with the connecting stop block to penetrate through the precast concrete cylinder and extend into the precast concrete cylinder again after extending out of the precast concrete cylinder and encircling the liquid storage ring box for a plurality of circles, and welding a baffle below one end of the steel wire rope extending into the precast concrete cylinder again;
d, fixing the mounting flange on an upper connecting ring barrel of the middle barrel of the uppermost terminal, and fixedly connecting a lower connecting ring barrel of the middle barrel of the lowermost terminal with the concrete slab;
e, conveying the plurality of sub-intermediate cylinders to a preset position through a conveying device such as a traction ship, sequentially downwards putting the sub-intermediate cylinders from large to small, and enabling the inserting blocks of the upper sub-intermediate cylinder to extend into the inserting holes of the lower sub-intermediate cylinder;
f, after the assembly of each sub-intermediate cylinder is completed, filling ballast filler downwards from the mounting flange.
Compared with the prior art, the invention has the beneficial effects that:
according to the prestress foundation structure of the wind turbine and the construction method thereof, the plurality of sub-intermediate cylinders are assembled to form the intermediate cylinders, so that the production and transportation costs are reduced, the supporting ring plates, the connecting stop blocks, the steel wire ropes and the stop plates are arranged in each precast concrete cylinder, the ballast filler is used for pressing the stop plates, the outwards-expanded prestress is applied to each precast concrete cylinder one by one, the precast concrete cylinders are subjected to full and concentrated prestress, the compression resistance effect of the precast concrete cylinders is improved, the steel wire ropes press the liquid storage ring boxes to collapse to release the adhesive when being stretched, the connection stability between the insert blocks and the lower ring plates is improved, and the splicing stability between adjacent sub-intermediate cylinders is further improved.
Drawings
FIG. 1 is a three-dimensional schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional elevation view of the overall structure of the present invention;
FIG. 3 is a schematic cross-sectional elevation of a single sub-intermediate cartridge structure of the present invention;
FIG. 4 is a schematic view of a steel wire rope encircling a reservoir in the present invention;
FIG. 5 is a schematic top view of a single sub-cartridge structure according to the present invention;
FIG. 6 is a schematic top cross-sectional view of the precast concrete segments and support ring attachment of the present invention.
In the figure: the concrete slab comprises a mounting flange 1, a concrete slab 2, a precast concrete cylinder 3, an upper connecting ring cylinder 4, a lower connecting ring cylinder 5, an upper ring plate 6, a jack 61, a ring groove 62, a liquid storage ring box 7, a lower ring plate 8, a plug 9, a supporting ring plate 10, a connecting stop 11, a steel wire rope 12, a baffle 13, a puncture block 14 and a guide block 15.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
Referring to fig. 1-6, the present invention provides a technical solution:
example 1
The prestress foundation structure of the wind turbine comprises an upper end fixedly connected with a mounting flange 1 and a middle barrel of which the lower end is fixedly connected with a concrete slab 2, wherein the middle barrel is formed by assembling three sub middle barrels up and down, the manufacturing and transportation are convenient, the production and transportation costs are reduced, any sub middle barrel is an upper connecting ring barrel 4, a precast concrete barrel 3 and a lower connecting ring barrel 5 which are distributed from top to bottom, the joints of the precast concrete barrel 3, the upper connecting ring barrel 4 and the lower connecting ring barrel 5 are integrally cast and formed, the arc transition is arranged between the joints of the precast concrete barrel 3, the upper connecting ring barrel 4 and the lower connecting ring barrel 5, the internal stress of the sub middle barrel is improved, the precast concrete barrel 3 for storing ballast filler is of a circular truncated cone barrel structure with the upper narrow lower wide, the lower connecting ring barrel 5 of the upper sub middle barrel is the same as the upper connecting ring barrel 4 of the lower sub middle barrel, when the prestress foundation structure of the wind turbine is assembled, the large-sized sub middle barrel is firstly pressed against the small-sized sub middle barrel 2, the small-sized sub middle barrel 5 is pressed against the upper middle barrel 4, and the small-sized middle barrel is then pressed down, and the large-sized middle barrel is sequentially aligned with the small-sized middle barrel 4, and the large-sized middle barrel is sequentially placed into the middle barrel 4, and the middle barrel is sequentially positioned in the middle barrel 1;
the outer side of the upper connecting ring cylinder 4 is fixedly connected with an upper ring plate 6, the upper ring plate 6 is provided with four jacks 61 which are penetrated up and down, the four jacks 61 are uniformly distributed along the circumferential direction of the upper ring plate 6, the outer side of the lower connecting ring cylinder 5 is fixedly connected with a lower ring plate 8, the lower ring plate 8 is fixedly connected with four inserting blocks 9 which are aligned one by one and extend into the jacks 61 of the lower sub-intermediate cylinder, the splicing is completed between the upper sub-intermediate cylinder and the lower sub-intermediate cylinder by inserting the inserting blocks 9 into the jacks 61, the operation is simple and reliable, the underwater operation is convenient, the arrangement of the lower ring plate 8 improves the drainage volume of the sub-intermediate cylinder, so that the conveying convenience of the sub-intermediate cylinder is improved, the upper ring plate 6 is not arranged on the uppermost sub-intermediate cylinder in the embodiment, and the lower ring plate 8 is not arranged on the lowermost sub-intermediate cylinder, so that the production and manufacturing cost of the sub-intermediate cylinder is reduced on the premise of not influencing the installation and use;
the inner wall of the precast concrete cylinder 3 is fixedly connected with a supporting annular plate 10 in an annular manner, the supporting annular plate 10 is an annular steel plate, the supporting annular plate 10 is arranged to provide support for the precast concrete cylinder 3, the compression resistance of the precast concrete cylinder 3 is improved, so that the precast concrete cylinder 3 placed in the sea can bear larger water pressure, the service life of the precast concrete cylinder 3 is prolonged, the inner wall of the supporting annular plate 10 is movably extruded with a connecting stop block 11, the connecting stop block 11 is fixedly connected with a steel wire rope 12 penetrating through the supporting annular plate 10 and extending out of the precast concrete cylinder 3, the outer side of a jack 61 is connected with an annular groove 62, the annular groove 62 is opened at the lower end face of a lower annular plate 8, the subsequent installation of the liquid storage annular box 7 is facilitated, the inner wall of the annular groove 62 is fixedly connected with a plurality of rings surrounding the outer side of the jack 61 and internally storing adhesive liquid storage annular box 7, the steel wire rope 12 extends into the precast concrete cylinder 3 again, the steel wire rope 12 is fixedly connected with a baffle 13 below one end of the precast concrete cylinder 3 again, the three ballast sub-cylinders are filled with a ballast foundation, and the ballast stability of the ballast sub-assembly is improved after the ballast sub-assembly is completed, and the ballast sub-assembly is filled into the ballast sub-assembly;
in the process of filling ballast filler into the inner cavity of the sub-middle cylinder, the ballast filler downwards presses the baffle 13, so that the baffle 13 downwards slides, the steel wire rope 12 is downwards slid and pulled, the steel wire rope 12 is stressed to stretch and press the liquid storage ring box 7, the liquid storage ring box 7 is broken and damaged under the pressing of the steel wire rope 12, the adhesive in the liquid storage ring box 7 flows out and fills in the gaps between the insert block 9, the inserting hole 61 and the annular groove 62, wherein the adhesive is waterproof adhesive, the insert block 9 is fixedly adhered in the upper ring plate 6, the connection strength between adjacent sub-middle cylinders is improved, the steel wire rope 12 is pulled by the baffle 13 along the direction close to the precast concrete cylinder 3, the connection stop 11 presses the supporting ring plate 10 to outwards expand, the supporting ring plate 10 presses the precast concrete cylinder 3 to outwards expand, the supporting ring plate 10 and the precast concrete cylinder 3 have the prestress of outwards expanding, the follow-up water pressure is counteracted to inwards press the precast concrete cylinder 3, and the service life of the precast concrete cylinder 3 is prolonged.
Example two
The second embodiment optimizes the prestress to which the precast concrete segments 3 are subjected on the basis of the first embodiment, namely: four connecting stop blocks 11 are uniformly arranged on the inner wall of the support ring plate 10 along the circumferential direction of the support ring plate, any one connecting stop block 11 is fixedly connected with a steel wire rope 12 which extends out of the precast concrete cylinder 3 and surrounds the liquid storage ring box 7 for a plurality of circles and then extends into the precast concrete cylinder 3 again, one end of the four steel wire ropes 12 which extends into the precast concrete cylinder 3 again is fixedly connected above the same baffle plate 13, the baffle plate 13 is stably and horizontally arranged in the precast concrete cylinder 3 under the traction of the four steel wire ropes 12, the baffle plate 13 is conveniently pressed downwards by the follow-up ballast filler, and the baffle plate 13 slides downwards under the pressure of the ballast filler so that the four connecting stop blocks 11 are pressed to press the support ring plate 10 to expand outwards, and the stability of the outward expansion of the support ring plate 10 is improved;
further, two supporting ring plates 10 which are vertically and alternately distributed are fixedly connected to the inner wall of any precast concrete cylinder 3 in the circumferential direction, and a steel wire rope 12 penetrating through the upper supporting ring plate 10 extends downwards in the side wall of the precast concrete cylinder 3 and is fixedly connected to a steel wire rope 12 penetrating through the lower supporting ring plate 10 and extending into the side wall of the precast concrete cylinder 3, when the baffle 13 slides downwards, the steel wire rope 12 presses the two supporting ring plates 10 to expand outwards through the connecting stop block 11, the supporting ring plates 10 expand outwards and press the precast concrete cylinder 3 to expand outwards, and the stability of the outward expansion of the precast concrete cylinder 3 is improved through the arrangement of the two supporting ring plates 10;
further, the guide block 15 of trepanning upwards is fixedly connected with to the precast concrete section of thick bamboo 3 outer wall, and wire rope 12 pass support ring board 10, precast concrete section of thick bamboo 3 and upwards stretch out in the annular groove 62 after stretching out the guide block 15, the setting of guide block 15 is leading wire rope 12's travel path, and guide block 15 plays the guard action to wire rope 12 and precast concrete section of thick bamboo 3 outer wall, avoid wire rope 12 when the atress tensile with precast concrete section of thick bamboo 3 outer wall take place the problem of extrusion wearing and tearing.
Example III
Embodiment III the adhesion strength between the insert block 9 and the upper ring plate 6 is optimized on the basis of embodiment one, namely: the puncture blocks 14 with sharp parts are stored in the liquid storage ring box 7, the steel wire rope 12 presses the liquid storage ring box 7 to deform and collapse inwards under the action of external force, the inner wall of the liquid storage ring box 7 is in extrusion contact with the puncture blocks 14 in the inward deformation and collapse process, the puncture blocks 14 puncture the liquid storage ring box 7, the cracking degree of the liquid storage ring box 7 is increased, the outflow of adhesive is facilitated, a plurality of pits are formed in the outer wall of the insert block 9, the contact area between the adhesive and the outer wall of the insert block 9 is increased due to the arrangement of the pits, and then the adhesive strength between the insert block 9 and the upper ring plate 6 is improved.
A construction method is used for the prestress foundation structure of the wind turbine generator, and comprises the following steps:
a, pouring and forming concrete to form a sub-intermediate cylinder embryonic form with an upper connecting ring cylinder 4, a precast concrete cylinder 3, a lower connecting ring cylinder 5, an upper ring plate 6, a lower ring plate 8 and an insertion block 9, and reserving a channel for a steel wire rope 12 to pass through;
b, cutting a jack 61 according to the position of the inserting block 9, cutting an annular groove 62 on the outer wall of the jack 61, and fixing the liquid storage annular box 7 on the inner wall of the annular groove 62;
c, fixing a supporting ring plate 10 on the inner wall of the precast concrete cylinder 3, penetrating a steel wire rope 12 with a connecting stop block 11 out of the precast concrete cylinder 3, encircling the liquid storage ring box 7 for a plurality of circles, then stretching into the precast concrete cylinder 3 again, and welding a baffle 13 below one end of the steel wire rope 12 stretching into the precast concrete cylinder 3 again;
the mounting flange 1 is fixed on the upper connecting ring cylinder 4 of the middle cylinder of the uppermost terminal, and the lower connecting ring cylinder 5 of the middle cylinder of the lowermost terminal is fixedly connected with the concrete slab 2;
e, conveying the plurality of sub-intermediate cylinders to a preset position through a conveying device such as a traction ship, sequentially downwards putting the sub-intermediate cylinders from large to small, and enabling the insertion block 9 of the upper sub-intermediate cylinder to extend into the insertion hole 61 of the lower sub-intermediate cylinder;
f, after the assembly of each sub-intermediate cylinder is completed, filling ballast filler downwards from the mounting flange 1.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a wind turbine generator system prestressing force foundation structure, includes middle section of thick bamboo that upper end fixed connection mounting flange (1), lower extreme fixed connection concrete slab (2), its characterized in that: the middle barrels are formed by up-down assembly of at least two sub middle barrels, the sub middle barrels are integrally cast and formed by an upper connecting ring barrel (4), a precast concrete barrel (3) and a lower connecting ring barrel (5) which are distributed from top to bottom, the precast concrete barrel (3) for storing ballast filler is of a round platform barrel structure with a narrow upper part and a wide lower part, the lower connecting ring barrel (5) of the upper sub middle barrel is the same as the upper connecting ring barrel (4) of the lower sub middle barrel in size, an upper ring plate (6) is fixedly connected to the outer side of the upper connecting ring barrel (4), a plurality of jacks (61) which are communicated up and down are formed in the upper ring plate (6), a lower ring plate (8) is fixedly connected to the outer side of the lower connecting ring barrel (5), a plurality of inserting blocks (9) which extend into the jacks (61) of the lower sub middle barrel are fixedly connected to the lower ring plate (8), the upper ring plate (6) is not arranged on the uppermost sub middle barrel, and the lower ring plate (8) is not arranged on the lowermost sub middle barrel;
the inner wall of the precast concrete cylinder (3) is fixedly connected with a supporting annular plate (10) in an annular manner, a connecting stop block (11) is movably extruded at the inner wall of the supporting annular plate (10), the connecting stop block (11) is fixedly connected with a steel wire rope (12) penetrating through the supporting annular plate (10) and extending out of the precast concrete cylinder (3), an annular groove (62) is connected to the outer side of the insertion hole (61), an annular groove (62) is fixedly arranged in the annular groove (62), a liquid storage annular box (7) which surrounds the outer side of the insertion hole (61) and stores adhesive agent is fixedly arranged in the annular groove, the steel wire rope (12) extends out of the precast concrete cylinder (3) and then surrounds the outer wall of the liquid storage annular box (7) and extends into the precast concrete cylinder (3) again, a baffle (13) is fixedly connected to the inner wall of the supporting annular plate (10) along the annular direction, a plurality of connecting stop blocks (11) are uniformly arranged at the inner wall of the position of the supporting annular plate, a plurality of connecting stop blocks (11) are fixedly connected with a plurality of steel wire ropes extending out of the precast concrete cylinder (3), and surround the liquid storage annular box (7) and extend into the precast concrete cylinder (12) again, and one end of the steel wire ropes (12) extend into the precast concrete cylinder (3) again fixedly;
after assembly, ballast filler is downwards injected from the mounting flange (1), the ballast filler falls into the inner cavity of the sub-intermediate cylinder, in the process of injecting the ballast filler into the inner cavity of the sub-intermediate cylinder, the ballast filler downwards presses the baffle plate (13), the baffle plate (13) downwards slides, the steel wire rope (12) is downwards slid and pulled, the steel wire rope (12) is stressed to stretch and press the liquid storage ring box (7), the liquid storage ring box (7) is broken and damaged under the pressing of the steel wire rope (12), the adhesive in the liquid storage ring box (7) flows out and is filled in the gaps of the insert block (9), the insertion hole (61) and the annular groove (62), the adhesive is waterproof adhesive, so that the insert block (9) is fixed and adhered in the lower ring plate (8), the connecting strength between adjacent sub-intermediate cylinders is improved, the steel wire rope (12) downwards slides and pulls the connecting stop block (11) along the direction close to the precast concrete cylinder (3), the supporting ring plate (10) outwards expands, the supporting ring plate (10) outwards presses and the precast concrete (3) outwards, and the service life of the precast concrete (3) is prolonged.
2. The wind turbine prestressing foundation structure of claim 1, wherein: the liquid storage ring box (7) is internally provided with a plurality of puncture blocks (14) with sharp parts.
3. The wind turbine prestressing foundation structure of claim 1, wherein: the outer wall of the precast concrete cylinder (3) is fixedly connected with a guide block (15) with an upward opening, and the steel wire rope (12) penetrates through the supporting annular plate (10), the precast concrete cylinder (3) and extends into the annular groove (62) after extending upwards out of the guide block (15).
4. The wind turbine prestressing foundation structure of claim 1, wherein: the inner wall of the precast concrete cylinder (3) is annularly and fixedly connected with at least two supporting annular plates (10) which are distributed at intervals up and down, and a steel wire rope (12) penetrating through the upper supporting annular plate (10) extends downwards in the side wall of the precast concrete cylinder (3) and is fixedly connected to a rope body of the steel wire rope (12) penetrating through the lower supporting annular plate (10) and extending into the side wall of the precast concrete cylinder (3).
5. The wind turbine prestressing foundation structure of claim 1, wherein: the outer wall of the inserting block (9) is provided with a plurality of concave points.
6. The wind turbine prestressing foundation structure of claim 1, wherein: the upper connecting ring cylinder (4) of the middle cylinder of the uppermost terminal is fixedly connected with the mounting flange (1), and the lower connecting ring cylinder (5) of the middle cylinder of the lowermost terminal is fixedly connected with the concrete slab (2).
7. A construction method for a prestress foundation structure of a wind turbine according to any one of claims 1-6, comprising the steps of:
a, pouring and forming concrete to form a sub-intermediate cylinder blank with an upper connecting ring cylinder (4), a precast concrete cylinder (3), a lower connecting ring cylinder (5), an upper ring plate (6), a lower ring plate (8) and an insert block (9), and reserving a channel for a steel wire rope (12) to pass through;
b, cutting a jack (61) according to the position of the inserting block (9), cutting an annular groove (62) on the outer wall of the jack (61), and fixing the liquid storage ring box (7) on the inner wall of the annular groove (62);
c, fixing a supporting ring plate (10) on the inner wall of the precast concrete cylinder (3), penetrating a steel wire rope (12) with a connecting stop block (11) out of the precast concrete cylinder (3), encircling a liquid storage ring box (7) for a plurality of circles, then stretching into the precast concrete cylinder (3) again, and welding a baffle plate (13) below one end of the steel wire rope (12) stretching into the precast concrete cylinder (3) again;
d, fixing the mounting flange (1) on an upper connecting ring cylinder (4) of the middle cylinder of the uppermost terminal, and fixedly connecting a lower connecting ring cylinder (5) of the middle cylinder of the lowermost terminal with the concrete slab (2);
e, conveying the plurality of sub-intermediate cylinders to a preset position through a conveying device such as a traction ship, sequentially downwards putting the sub-intermediate cylinders from large to small, and enabling the inserting blocks (9) of the upper sub-intermediate cylinder to extend into the inserting holes (61) of the lower sub-intermediate cylinder;
f, after the assembly of each sub-intermediate cylinder is finished, filling ballast filler downwards from the mounting flange (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210771857.8A CN114960739B (en) | 2022-06-30 | 2022-06-30 | Prestressed foundation structure of wind turbine generator and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210771857.8A CN114960739B (en) | 2022-06-30 | 2022-06-30 | Prestressed foundation structure of wind turbine generator and construction method thereof |
Publications (2)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886400A (en) * | 2010-07-01 | 2010-11-17 | 江苏新誉重工科技有限公司 | Foundation of wind generating set |
| CN204024928U (en) * | 2014-07-10 | 2014-12-17 | 中国电建集团西北勘测设计研究院有限公司 | One can assemble self-erecting type wind power generating set prestressed concrete steel combination pylon |
| CN108266330A (en) * | 2018-03-06 | 2018-07-10 | 中国电建集团华东勘测设计研究院有限公司 | A kind of Wind turbines prestressing force steel reinforced concrete tower |
| CN108867684A (en) * | 2018-07-18 | 2018-11-23 | 上海勘测设计研究院有限公司 | Offshore wind turbine gravity caisson basis and its installation method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886400A (en) * | 2010-07-01 | 2010-11-17 | 江苏新誉重工科技有限公司 | Foundation of wind generating set |
| CN204024928U (en) * | 2014-07-10 | 2014-12-17 | 中国电建集团西北勘测设计研究院有限公司 | One can assemble self-erecting type wind power generating set prestressed concrete steel combination pylon |
| CN108266330A (en) * | 2018-03-06 | 2018-07-10 | 中国电建集团华东勘测设计研究院有限公司 | A kind of Wind turbines prestressing force steel reinforced concrete tower |
| CN108867684A (en) * | 2018-07-18 | 2018-11-23 | 上海勘测设计研究院有限公司 | Offshore wind turbine gravity caisson basis and its installation method |
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