CN113818476A - Foundation component for offshore wind power generation and construction method thereof - Google Patents
Foundation component for offshore wind power generation and construction method thereof Download PDFInfo
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- CN113818476A CN113818476A CN202111180697.1A CN202111180697A CN113818476A CN 113818476 A CN113818476 A CN 113818476A CN 202111180697 A CN202111180697 A CN 202111180697A CN 113818476 A CN113818476 A CN 113818476A
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- 238000010248 power generation Methods 0.000 title claims abstract description 58
- 238000010276 construction Methods 0.000 title abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 17
- 230000007704 transition Effects 0.000 claims description 16
- 238000005728 strengthening Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 241000282326 Felis catus Species 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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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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Abstract
The invention discloses a foundation component for offshore wind power generation and a construction method thereof, and relates to the technical field of wind power generation. The foundation component for offshore wind power generation and the construction method thereof can ensure the installation water depth, and have good bearing capacity and high reliability.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a foundation member for offshore wind power generation and a construction method thereof.
Background
Offshore wind power generation is a clean energy with great development potential, compared with onshore wind power generation, the offshore wind power generation has no restriction of terrains, has higher average wind speed and longer annual utilization hours, cannot cause vision and noise pollution, is suitable for installing a large-capacity fan, is closer to a coastal energy high-demand area, and has short power transmission distance. As the offshore wind driven generator is built in a marine environment, a foundation part in water is subjected to horizontal wave and ocean current loads, vertical superstructure dead weight loads and horizontal loads and bending moments provided by the superstructure under the action of wind loads. The offshore wind power foundation is complex in mechanism, high in technical difficulty and high in construction cost. At present, the most used offshore wind power foundation is a single-pile foundation. Other conventional offshore wind turbine foundations also include jacket foundations, gravity foundations, high pile cap foundations, and the like.
The existing offshore wind power basic mechanism comprises: firstly, a single pile foundation is adopted, a large-diameter hollow circular pile is drilled or driven into seabed soil, a transition section is connected to the pile top through grouting, and a fan tower cylinder is fixed on a flange of the transition section. Secondly, the jacket foundation is a large truss structure formed by welding large-diameter and thick-wall low-alloy steel pipes, and the bottom of the jacket foundation can be fixed by piles or suction buckets, so that the jacket foundation is suitable for large water depth. And thirdly, the gravity type foundation provides horizontal resistance and overturning bending moment resistance by a base with larger mass. The high pile cap foundation consists of a plurality of inclined piles driven into the seabed and a reinforced concrete platform loaded on the inclined piles, is simple to construct and low in cost, and has more applications in wind fields in shallow sea areas in China. Suction bucket foundation, the foundation structural style that appears in recent years, adsorb on the seabed surface as the base by the back-off formula bucket type structure, and the lower part of foundation passes through certain degree of depth below the seabed through the negative pressure, and upper portion is connected with the tower bucket through changeover portion or steel pipe top inner flange.
The above conventional offshore wind power infrastructure has its own problems. The single-pile foundation depends on the geological conditions of the sandy soil engineering, and is limited by mounting equipment, and the bucket diameter cannot be too large, so that the limit water depth of the single-pile foundation can only reach more than 40 meters. The depth of water that the jacket basis can bear is great, but because the structure is complicated, manufacturing cost is high, and structural connection point is too many simultaneously, and the fatigue problem is outstanding. The gravity type foundation is too large in size and heavy, meanwhile, the foundation surface seabed needs to be leveled before the foundation is installed, the cost is too high, and the fact that the gravity type foundation in the industry is rarely used is high. The newly emerging bucket foundations have been used with a small number of experimental properties, but the engineering of such foundations is not mature enough due to the very large bucket diameters.
Disclosure of Invention
The invention aims to provide a foundation member for offshore wind power generation and a construction method thereof, which are used for solving the problems in the prior art, ensuring the installation water depth, and having good bearing capacity and high reliability.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a foundation component for offshore wind power generation, which comprises a single-pile foundation, a connecting frame and a suction bucket foundation, wherein the upper end of the single-pile foundation is used for installing a power generation system, the lower end of the single-pile foundation is used for being fixed on the seabed, the connecting frame is used for being arranged around the outer side of the single-pile foundation and being fixed with the single-pile foundation, the suction bucket foundation is used for being fixed on different positions on the connecting frame and being arranged on the periphery of the single-pile foundation, and the suction bucket is arranged on the seabed through negative pressure and is used for providing bearing capacity.
Preferably, the single pile foundation includes first single pile section and second single pile section, the lower extreme of first single pile section with the upper end fixed connection of second single pile section, just the upper end of first single pile section is fixed with changeover portion and upper platform, the lower extreme of changeover portion is fixed the upper end of first single pile section, the upper platform is fixed the upper end of changeover portion, just the upper platform is used for the staff to stand, still be fixed with the cat ladder on the lateral wall of changeover portion, the upper end of cat ladder extends to the upper platform, the cat ladder is used for the staff to climb, second single pile section is used for stretching into to undersea and fixes at the seabed.
Preferably, the outer diameter of the first single pile section is larger than that of the second single pile section, and the lower end of the first single pile section is fixedly connected with the upper end of the second single pile section and is in smooth transition.
Preferably, the upper end of the transition section is open and is adapted to secure a power generation system, and the upper platform is secured circumferentially around the opening.
Preferably, the suction bucket foundation comprises at least three suction buckets, the suction buckets are arranged around the periphery of the single pile foundation, and the lower ends of the suction buckets are used for being adsorbed on the seabed under the action of suction.
Preferably, a connecting column is fixed at the upper end of each suction bucket, a vacuumizing hole is formed in the connecting column, the vacuumizing hole can be communicated with the inside and the outside of the suction bucket, the vacuumizing hole is used for being connected with vacuumizing equipment, and the inside of the suction bucket is vacuumized through the vacuumizing equipment.
Preferably, the lower end of the connecting column is fixed on the upper end face of the suction barrel, a plurality of rib plates are fixed on the periphery of the connecting column, one side of each rib plate is fixed on the outer side wall of the connecting column, the lower end of each rib plate is fixed on the upper end face of the suction barrel, the adjacent rib plates are fixedly connected through reinforcing ribs, and the lower end of each reinforcing rib is fixed on the upper end face of the suction barrel.
Preferably, the link includes upper sleeve, lower sleeve, a plurality of upper connecting pipe, a plurality of lower connecting pipe and a plurality of stay tube, upper sleeve is used for fixed cover to locate the periphery of first single pile section, just lower sleeve is used for fixed cover to locate the periphery of second single pile section, each the one end of upper connecting pipe is fixed on upper sleeve's outer wall, just the other end of upper connecting pipe is fixed on the outer wall of spliced pole, each the one end of lower connecting pipe is fixed on lower sleeve's outer wall, and each the other end of lower connecting pipe is fixed on the outer wall of spliced pole, adjacent pass through between the spliced pole the stay tube is connected.
Preferably, an included angle is formed between the upper connecting pipe and the horizontal plane, and one end, close to the upper sleeve, of the upper connecting pipe is higher than one end, close to the connecting column, of the upper connecting pipe; an included angle is formed between the lower connecting pipe and the horizontal plane, and one end, close to the lower sleeve, of the lower connecting pipe is lower than one end, close to the connecting column, of the lower connecting pipe; the supporting pipes are parallel to the horizontal plane, and one supporting pipe is fixed between every two adjacent connecting columns.
The invention also provides a construction method of the foundation member for offshore wind power generation, which comprises the following steps:
s1: prefabricating the suction bucket foundation on land, and fixing the connecting frame and the suction bucket foundation;
s2: fixedly connecting the connecting frame with the single-pile foundation, checking the air tightness of the suction bucket foundation, loading the offshore wind power generation foundation component on an installation ship, and dragging the offshore wind power generation foundation component to an installation site through the installation ship;
s3: and driving the single pile foundation into the sea to a specified depth, simultaneously carrying out self-weight sinking on the suction bucket foundation, and then carrying out negative pressure suction to penetrate into the sea bottom.
Compared with the prior art, the invention has the following technical effects:
the invention provides a foundation component for offshore wind power generation, the upper end of a single pile foundation is used for installing a power generation system, the lower end of the single pile foundation is used for being fixed on the seabed so as to support the power generation system through the single pile foundation and ensure that the power generation system is positioned above the sea level, thereby realizing wind power generation, a connecting frame is arranged around the outer side of the single pile foundation and is used for being fixed with the single pile system, a suction bucket foundation is used for being fixed at different positions on the connecting frame and is arranged at the periphery of the single pile foundation, a suction bucket is arranged on the seabed through negative pressure and is used for providing bearing capacity, the ultimate bearing capacity of the whole foundation component for offshore wind power generation is improved by using the suction bucket foundation, the well-developed single pile foundation is used as a component for bearing the power generation system, the working reliability of the structure is ensured, and meanwhile, the suction bucket foundation and the single pile foundation are connected and fixed by using the connecting frame, make single pile foundation and suction bucket foundation spacing each other, and then improve overall stability, can be used for the fixed when higher depth of water.
According to the construction method of the foundation member for offshore wind power generation, the suction bucket foundation is prefabricated on the land, the connecting frame is fixed with the suction bucket foundation, the installation efficiency can be improved, and the integral bearing capacity can be improved by utilizing the suction bucket foundation; with link and single pile foundation fixed connection, and then realize the installation and fixed of single pile foundation and suction bucket foundation through the link to improve fix holistic stability in place, and then can be applicable to under the darker water and fix.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a foundation member for offshore wind power generation according to a first embodiment;
FIG. 2 is a front view of a base member of the offshore wind power generation system of FIG. 1;
FIG. 3 is a top view of the base member of the offshore wind power generation system of FIG. 1;
in the figure: 100-offshore wind power generation foundation component, 200-suction barrel foundation, 300-connecting frame, 400-single pile foundation, 1-upper connecting pipe, 2-supporting pipe, 3-lower connecting pipe, 4-lower sleeve, 5-second single pile section, 6-suction barrel, 7-upper sleeve, 8-connecting column, 9-transition section, 10-ladder stand, 11-upper platform, 12-tower barrel flange, 13-ribbed plate, 14-reinforcing rib and 15-vacuumizing hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a foundation member for offshore wind power generation and a construction method thereof, and aims to solve the technical problems that the existing foundation member for offshore wind power generation is poor in bearing capacity and cannot be applied to deep sea.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
As shown in fig. 1 to 3, the present embodiment provides a foundation member 100 for offshore wind power generation, which includes a mono-pile foundation 400, a connection frame 300 and a suction bucket foundation 200, wherein an upper end of the mono-pile foundation 400 is used for installing a power generation system, a lower end of the mono-pile foundation 400 is used for being fixed on the sea bottom to support the power generation system through the mono-pile foundation 400, and ensure that the power generation system is located above the sea level, thereby realizing wind power generation, the connection frame 300 is used for being disposed around an outer side of the mono-pile foundation 400 and used for being fixed with the mono-pile foundation 400, and the suction bucket foundation 200 is used for being fixed at different positions on the connection frame 300 and used for being disposed at the periphery of the mono-pile foundation 400, the suction bucket 6 is installed on the sea bottom through negative pressure and used for providing bearing capacity, the ultimate bearing capacity of the entire foundation member 100 for offshore wind power generation is improved by using the suction bucket foundation 200, the well-developed mono-pile foundation 400 is used as a member for bearing the power generation system, the operational reliability of structure is guaranteed, simultaneously, utilize link 300 to connect suction bucket foundation 200 and single pile foundation 400 fixed for single pile foundation 400 and suction bucket foundation 200 are spacing each other, and then improve overall stability, can be used for the fixed when higher depth of water.
Specifically, the single-pile foundation 400 includes a first single-pile section and a second single-pile section 5, the lower end of the first single-pile section is fixedly connected with the upper end of the second single-pile section 5 to form a main structure of the single-pile foundation 400, the upper end of the first single-pile section is fixed with a transition section 9 and an upper platform 11, the lower end of the transition section 9 is fixed at the upper end of the first single-pile section, the transition section 9 is used for assisting in fixing the power generation system, the upper platform 11 is fixed at the upper end of the transition section 9, the upper platform 11 is used for workers to stand, a tower flange 12 is arranged at the upper end of the upper platform 11, a installation stability for cooperating power generation system installation, still be fixed with cat ladder 10 on the lateral wall of changeover portion 9, the upper end of cat ladder 10 extends to upper platform 11, and cat ladder 10 is used for the staff climbing, is convenient for overhaul power generation system, and second single pile section 5 is used for stretching into undersea and fixes at the seabed, and then guarantees single pile basis 400.
The outer diameter of the first single pile section is larger than that of the second single pile section 5, so that on one hand, the material consumption can be reduced, the construction cost is reduced, on the other hand, the pile sinking resistance is extremely low, the power requirement on a hydraulic hammer used for construction is low, the efficiency is improved, the construction cost is reduced, the lower end of the first single pile section is fixedly connected with and smoothly transits the upper end of the second single pile section 5, and the overall strength of the outer surface is improved.
The upper end opening of changeover portion 9 is used for fixed power generation system, and upper mounting plate 11 is fixed around opening circumference, is convenient for overhaul power generation system.
The suction bucket foundation 200 includes at least three suction buckets 6, and the suction buckets 6 are arranged around the periphery of the mono-pile foundation 400, and the lower end of each suction bucket 6 is used for being adsorbed on the seabed by suction force, preferably, the number of the suction buckets 6 is three, and the diameter of the suction bucket 6 is 5-10m, the height is 7-14m, the diameter of the mono-pile foundation 400 is 5-8m, the driving depth is 20-40m, and the vertical distance between the axis of the mono-pile foundation 400 and the axis of the suction bucket 6 is 2-5 times the diameter of the suction bucket 6, thereby ensuring that the stability of the mono-pile foundation 400 is improved by the suction bucket 6 arranged in the circumferential direction, and preventing the mono-pile foundation 400 from being inclined.
If rock-socketing is encountered, the diameter and length of the mono-pile foundation 400 can be reduced appropriately, and accordingly, in order to increase the ultimate bearing capacity, the vertical distance between the axis of the suction tube and the axis of the mono-pile foundation 400 can be adjusted to be larger, while varying the dimensions of the connecting frame 300. If the seabed sludge is soft and the covering layer is too thick, the diameter, the embedding depth and the horizontal span of the whole structure of the suction bucket 6 can be properly increased to ensure the structural stability.
Each upper end of suction bucket 6 all is fixed with a spliced pole 8, evacuation hole 15 has been seted up on the spliced pole 8, evacuation hole 15 can communicate the inside and the external world of suction bucket 6, and evacuation hole 15 is used for connecting evacuation equipment, and through evacuation equipment evacuation in to suction bucket 6, and then provide suction, fix suction bucket 6 at the assigned position, and it is spacing to stabilize single pile basis 400 through suction bucket 6 that circumference set up, prevent that single pile basis 400 from taking place the beat.
The lower extreme of spliced pole 8 is fixed at the up end of suction bucket 6, the periphery of spliced pole 8 is fixed with a plurality of floor 13, the lateral wall at spliced pole 8 is fixed to one side of floor 13, the lower extreme of floor 13 is fixed at the up end of suction bucket 6, through strengthening rib 14 fixed connection between the adjacent floor 13, and the lower extreme of each strengthening rib 14 is fixed at the up end of suction bucket 6, and then improve the bulk strength of suction bucket 6 through floor 13 and strengthening rib 14, and simultaneously, under the effect of wind, unrestrained, flow, some loads that single pile basis 400 bore transmit suction bucket 6 through link 300, utilize floor 13 and strengthening rib 14 evenly to transmit the stress to the up end of suction bucket 6 simultaneously, prevent the phenomenon of stress concentration.
The connecting frame 300 comprises an upper sleeve 7, a lower sleeve 4, a plurality of upper connecting pipes 1, a plurality of lower connecting pipes 3 and a plurality of supporting pipes 2, wherein the upper sleeve 7 is fixedly sleeved on the periphery of a first single pile section, the lower sleeve 4 is fixedly sleeved on the periphery of a second single pile section 5, one end of each upper connecting pipe 1 is fixed on the outer wall of the upper sleeve 7, the other end of each upper connecting pipe 1 is fixed on the outer wall of a connecting column 8, one end of each lower connecting pipe 3 is fixed on the outer wall of the lower sleeve 4, the other end of each lower connecting pipe 3 is fixed on the outer wall of the connecting column 8, adjacent connecting columns 8 are connected through the supporting pipes 2, the whole structure of the connecting frame 300 is simple and clear, the connection of the single pile foundation 400 and each suction bucket 6 is realized through the upper connecting pipes 1, the lower connecting pipes 3 and the like, the load is convenient to transmit, the integral anti-storm capacity is improved, when the single pile foundation 400 is of the same diameter up and down, the upper sleeve 7 and the lower sleeve 4 are equal in size and are cylindrical; when the diameter of the upper part of the single pile foundation 400 is larger than that of the lower part, the upper sleeve 7 is in a cylindrical shape with the same diameter from top to bottom, and the lower sleeve 4 is in a circular truncated cone shape with a wide top and a narrow bottom and is arranged at the transition part of the first single pile section and the second single pile section 5.
An included angle is formed between the upper connecting pipe 1 and the horizontal plane, and one end, close to the upper sleeve 7, of the upper connecting pipe 1 is higher than one end, close to the connecting column 8, of the upper connecting pipe 1; an included angle is formed between the lower connecting pipe 3 and the horizontal plane, and one end, close to the lower sleeve, of the lower connecting pipe 3 is lower than one end, close to the connecting column 8, of the lower connecting pipe 3; stay tube 2 is parallel with the horizontal plane, and all is fixed with a stay tube 2 between every two adjacent spliced poles 8, has both realized the connection between each suction bucket 6 and spacing each other, realizes being connected between single pile foundation 400 and the suction bucket 6 again, avoids appearing rocking in the stormy waves environment, influences overall stability to and normal wind power generation.
Example two
The present embodiment provides a method for constructing a foundation member 100 for offshore wind power generation in the first embodiment, including the steps of:
s1: the suction bucket foundation 200 is prefabricated on land, and the connecting frame 300 is fixed with the suction bucket foundation 200, so that the installation efficiency can be improved, and the integral bearing capacity can be improved by using the suction bucket foundation 200;
s2: fixedly connecting the connecting frame 300 with the single-pile foundation 400, further realizing the installation and the fixation of the single-pile foundation 400 and the suction bucket foundation 200 through the connecting frame 300 so as to improve the overall stability after the fixation in place, further being suitable for the fixation under deeper water, checking the air tightness of the suction bucket foundation 200, ensuring that the suction bucket 6 can be stably fixed on the seabed under the action of suction, loading the offshore wind power generation foundation member 100 on an installation vessel, dragging the offshore wind power generation foundation member 100 to the installation site through the installation vessel so as to be convenient for the fixation of the offshore wind power generation foundation member 100;
in the actual installation process, for the single-pile foundation 400 with a wide upper part and a narrow lower part, the suction barrel 6 is installed to a specified depth, then the single-pile foundation 400 sequentially penetrates through an upper sleeve 7 and a lower sleeve 4 connected with the suction barrel 6, and the single-pile foundation 400 is driven to the specified depth;
for the single-pile foundation 400 with the unchanged diameter, the single-pile foundation 400 can be driven into a specified depth, and then the lower sleeve 4 and the upper sleeve 7 sequentially penetrate through the single-pile foundation 400; the suction tube can be installed first, and then the single-pile foundation 400 sequentially penetrates through the upper sleeve 7 and the lower sleeve 4;
s3: the single pile foundation 400 is driven into the sea to a designated depth while the suction bucket foundation 200 is sunk by its own weight, and then negative pressure suction is performed to penetrate into the sea bottom.
After the steps are completed, the gaps between the single-pile foundation 400 and the upper sleeve 7 and between the single-pile sleeve and the lower sleeve 4 are grouted, sealed and fixed, so that stable connection is realized, and finally, the transition section 9 and the power generation system can be installed.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (10)
1. An offshore wind power generation foundation member, characterized in that: the power generation system comprises a single-pile foundation, a connecting frame and a suction bucket foundation, wherein the upper end of the single-pile foundation is used for installing a power generation system, the lower end of the single-pile foundation is used for being fixed on the seabed, the connecting frame is used for being arranged around the outer side of the single-pile foundation and used for being fixed with the single-pile foundation, the suction bucket foundation is used for being fixed on different positions on the connecting frame and used for being arranged on the periphery of the single-pile foundation, and the suction bucket is installed on the seabed through negative pressure and used for providing bearing capacity.
2. Offshore wind power generation foundation component according to claim 1, characterized in that: the single pile foundation comprises a first single pile section and a second single pile section, the lower end of the first single pile section is fixedly connected with the upper end of the second single pile section, a transition section and an upper platform are fixed to the upper end of the first single pile section, the lower end of the transition section is fixed to the upper end of the first single pile section, the upper platform is fixed to the upper end of the transition section, the upper platform is used for workers to stand, a ladder stand is further fixed to the side wall of the transition section, the upper end of the ladder stand extends to the upper platform, the ladder stand is used for the workers to climb, and the second single pile section is used for extending into the sea and is fixed to the sea bottom.
3. Offshore wind energy generation foundation component according to claim 2, characterized in that: the outer diameter of the first single pile section is larger than that of the second single pile section, and the lower end of the first single pile section is fixedly connected with the upper end of the second single pile section and is in smooth transition.
4. Offshore wind energy generation foundation component according to claim 2, characterized in that: the upper end of the transition section is open and used for fixing a power generation system, and the upper platform is fixed circumferentially around the opening.
5. Offshore wind energy generation foundation component according to claim 2, characterized in that: the suction bucket foundation includes at least three suction buckets, and the suction bucket is arranged around the periphery of single pile foundation, each suction bucket lower extreme is used for adsorbing the seabed under the effect of suction.
6. Offshore wind power generation foundation component according to claim 5, characterized in that: the upper end of each suction bucket is fixed with a connecting column, the connecting column is provided with a vacuumizing hole, the vacuumizing hole can be communicated with the inside and the outside of the suction bucket, the vacuumizing hole is used for being connected with vacuumizing equipment, and the inside of the suction bucket is vacuumized through the vacuumizing equipment.
7. An offshore wind energy generation foundation component according to claim 6, characterized in that: the lower extreme of spliced pole is fixed the up end of suction bucket, the periphery of spliced pole is fixed with a plurality of floor, one side of floor is fixed the lateral wall of spliced pole, the lower extreme of floor is fixed the up end of suction bucket, adjacent pass through strengthening rib fixed connection between the floor, and each the lower extreme of strengthening rib is fixed the up end of suction bucket.
8. An offshore wind energy generation foundation component according to claim 6, characterized in that: the connecting frame comprises an upper sleeve, a lower sleeve, a plurality of upper connecting pipes, a plurality of lower connecting pipes and a plurality of supporting pipes, wherein the upper sleeve is used for fixedly sleeving the periphery of the first single pile section, the lower sleeve is used for fixedly sleeving the periphery of the second single pile section, one end of each upper connecting pipe is fixed to the outer wall of the upper sleeve, the other end of each upper connecting pipe is fixed to the outer wall of the corresponding connecting column, one end of each lower connecting pipe is fixed to the outer wall of the lower sleeve, the other end of each lower connecting pipe is fixed to the outer wall of the corresponding connecting column, and the adjacent connecting columns are connected through the supporting pipes.
9. An offshore wind energy generation foundation component according to claim 8, wherein: an included angle is formed between the upper connecting pipe and the horizontal plane, and one end, close to the upper sleeve, of the upper connecting pipe is higher than one end, close to the connecting column, of the upper connecting pipe; an included angle is formed between the lower connecting pipe and the horizontal plane, and one end, close to the lower sleeve, of the lower connecting pipe is lower than one end, close to the connecting column, of the lower connecting pipe; the supporting pipes are parallel to the horizontal plane, and one supporting pipe is fixed between every two adjacent connecting columns.
10. A method of constructing a foundation structure for offshore wind power generation according to any of claims 1 to 9, characterized in that: the method comprises the following steps:
s1: prefabricating the suction bucket foundation on land, and fixing the connecting frame and the suction bucket foundation;
s2: fixedly connecting the connecting frame with the single-pile foundation, checking the air tightness of the suction bucket foundation, loading the offshore wind power generation foundation component on an installation ship, and dragging the offshore wind power generation foundation component to an installation site through the installation ship;
s3: and driving the single pile foundation into the sea to a specified depth, simultaneously carrying out self-weight sinking on the suction bucket foundation, and then carrying out negative pressure suction to penetrate into the sea bottom.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114802650A (en) * | 2022-04-28 | 2022-07-29 | 上海华润大东船务工程有限公司 | Precision control process for installing suction cylinder type jacket in floating dock |
| CN114991148A (en) * | 2022-06-30 | 2022-09-02 | 福建永福电力设计股份有限公司 | Split type suction pile jacket installation positioning frame and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114802650A (en) * | 2022-04-28 | 2022-07-29 | 上海华润大东船务工程有限公司 | Precision control process for installing suction cylinder type jacket in floating dock |
| CN114802650B (en) * | 2022-04-28 | 2024-06-11 | 上海华润大东船务工程有限公司 | Precision control process for installing suction barrel type jacket in floating dock |
| CN114991148A (en) * | 2022-06-30 | 2022-09-02 | 福建永福电力设计股份有限公司 | Split type suction pile jacket installation positioning frame and construction method thereof |
| NL1044403B1 (en) * | 2022-08-19 | 2024-03-04 | Xprthub B V | An effective structure and an adjoining installation method for the foundation of an offshore facility |
| CN115288184A (en) * | 2022-09-01 | 2022-11-04 | 中国长江三峡集团有限公司 | Shallow-covering-layer offshore wind power single-pile composite foundation construction method and composite foundation thereof |
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Application publication date: 20211221 |