CN113982025A - Jacket foundation structure of offshore wind turbine and construction method thereof - Google Patents
Jacket foundation structure of offshore wind turbine and construction method thereof Download PDFInfo
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- CN113982025A CN113982025A CN202111195911.0A CN202111195911A CN113982025A CN 113982025 A CN113982025 A CN 113982025A CN 202111195911 A CN202111195911 A CN 202111195911A CN 113982025 A CN113982025 A CN 113982025A
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- 238000010276 construction Methods 0.000 title abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 40
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000013535 sea water Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 9
- 238000005188 flotation Methods 0.000 abstract description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 3
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 3
- 241001330002 Bambuseae Species 0.000 abstract description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 3
- 239000011425 bamboo Substances 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003466 welding Methods 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
- E02D27/42—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
- E02D27/50—Anchored 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
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
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Abstract
The invention provides a jacket foundation structure of an offshore wind turbine and a construction method thereof, and relates to the field of offshore wind power foundations. The jacket foundation structure of the offshore wind turbine comprises an upper floating box, a jacket, a lower floating box and a plurality of suction tubes, which are arranged from top to bottom, wherein the jacket is fixedly connected between the lower floating box and the upper floating box; the plurality of suction cylinders are respectively arranged at the lower part of the lower floating box, and a suction pump is arranged in the lower floating box; a lower transition structure is arranged between the lower buoyancy tank and the suction tube, the lower transition structure comprises a plurality of reinforcing rib plates with narrow tops and wide bottoms, the plurality of reinforcing rib plates are arranged around the axis of the suction tube at intervals in the circumferential direction, and the outer contours of the plurality of reinforcing rib plates protrude to the outer side of the edge of the suction tube; the downside of buoyancy tank still is equipped with bottom sprag structure down, and bottom sprag structure distributes with lower transition structure staggers. Utilize two flotation tank designs to improve whole buoyancy, can implement horizontal showy haulage, the convenience of transportation is better, increases bottom sprag structure and cooperates a suction section of thick bamboo, and stability after the installation of whole basis is better.
Description
Technical Field
The invention relates to the technical field of offshore wind power foundations, in particular to a jacket foundation structure of an offshore wind turbine and a construction method of the jacket foundation structure.
Background
In the process of building and operating an offshore wind turbine, whether the foundation structure is firm and reliable is crucial. At present, the foundation structure of the offshore wind turbine is of a single-pile type, a single-cylinder type, a composite cylinder type, a jacket foundation and the like, and the jacket foundation has the characteristics of light weight, high strength, suitability for various seabed and the like.
The offshore wind power foundation, the installation method thereof and the wind generating set are disclosed in Chinese invention patent application with application publication number CN109736343A and application publication number 2019.05.10, and specifically comprise a buoyancy tank, wherein a cavity is formed inside the buoyancy tank, and a through hole communicated with the cavity is formed in the upper surface of the buoyancy tank; the suction cylinder is arranged on the lower surface of the buoyancy tank, the lower end of the suction cylinder can be opened, and soil can enter the suction cylinder from the lower end of the suction cylinder so as to fix the suction cylinder; the jacket is arranged on the upper surface of the buoyancy tank and comprises a plurality of main legs, supporting rods and a transition section, and the transition section is arranged at the tops of the main legs and the supporting rods and used for being connected with the transition section of a tower of the wind generating set. The substructure of the offshore wind turbine foundation adopts a suction cylinder foundation, the foundation is sunk and irrigated by utilizing a negative pressure sinking irrigation principle, and the whole foundation can be designed into a self-floating type by utilizing a buoyancy tank.
When transporting offshore wind power foundations in the prior art, the buoyancy tank keeps the empty bin to provide buoyancy, and the empty bin is towed to an installation site through the mooring bollards and the mooring ropes by the tug boat. However, when the floating offshore wind power foundation is dragged by using the tug and the cable, the foundation is easy to shake and topple due to unstable gravity center, and has high transportation difficulty and poor safety; in addition, the offshore wind power foundation is fixed on the seabed only by the suction cylinder, the offshore wind turbine on the upper part cannot be reliably supported, and the stability of the whole foundation after installation is low.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a jacket foundation structure of an offshore wind turbine and a construction method thereof, so as to solve the problems that the existing offshore wind turbine foundation is easy to shake and topple due to unstable gravity center, the transportation difficulty is high, the safety is poor, the offshore wind turbine foundation is fixed on the sea bottom only by a suction tube, the offshore wind turbine at the upper part cannot be reliably supported, and the stability of the whole foundation after installation is low.
The technical scheme of the jacket foundation structure of the offshore wind turbine comprises the following steps:
the jacket foundation structure of the offshore wind turbine comprises an upper floating box, a jacket, a lower floating box and a plurality of suction cylinders which are arranged from top to bottom, wherein the jacket is fixedly connected between the lower floating box and the upper floating box;
the plurality of suction cylinders are respectively arranged at the lower part of the lower floating box, a suction pump is arranged in the lower floating box and communicated with the suction cylinders so as to suck the suction cylinders to a negative pressure state;
a lower transition structure is arranged between the lower buoyancy tank and the suction tube, the lower transition structure comprises a plurality of reinforcing rib plates with narrow tops and wide bottoms, the plurality of reinforcing rib plates are arranged around the axis of the suction tube at intervals in the circumferential direction, and the outer contours of the plurality of reinforcing rib plates protrude to the outer side of the edge of the suction tube;
the lower side of the lower buoyancy tank is also provided with a bottom supporting structure, the bottom supporting structure and the lower transition structure are distributed in a staggered mode, and the bottom supporting structure is used for being matched with a seabed support.
Furthermore, the jacket comprises at least three vertical rods, X-shaped supporting rods and horizontal supporting rods, the X-shaped supporting rods are in X-shaped cross fixed connection between every two adjacent vertical rods, and the horizontal supporting rods are fixedly connected between every two adjacent vertical rods and connected with the end portions of the X-shaped supporting rods.
Furthermore, the vertical projection shape of the lower floating box is a polygon, and the plurality of suction cylinders and the lower transition structure are correspondingly arranged at the lower side corner of the lower floating box;
the bottom support structure is arranged in the middle of the lower side of the lower buoyancy tank, and comprises a plurality of support rib plates which are circumferentially arranged at intervals relative to the center of the lower buoyancy tank.
Furthermore, the plurality of reinforcing ribs are distributed in a central symmetry manner about the central axis of the suction tube, the reinforcing ribs are in the shape of a right triangle, first right-angle edges of the plurality of reinforcing ribs extend along the axial direction of the suction tube and are fixedly connected together, and second right-angle edges of the plurality of reinforcing ribs are fixedly connected to the upper side surface of the suction tube.
Further, the shape of the suction tube is cylindrical, and the length of the second right-angle side of the reinforcing rib plate is larger than the radius of the suction tube and smaller than the diameter of the suction tube.
Furthermore, a sealed corner cabin is further arranged at the top corner of the lower floating box, and the suction pump is installed inside the sealed corner cabin.
Furthermore, the top of jacket still is equipped with transition structure, go up transition structure fixed connection in go up the outside of flotation tank, go up transition structure and be used for supplying fan tower section of thick bamboo fixed mounting.
The technical scheme of the construction method of the jacket foundation structure of the offshore wind turbine comprises the following steps:
the construction method of the jacket foundation structure of the offshore wind turbine comprises the following steps:
step one, prefabricating an upper buoyancy tank, a jacket, a lower buoyancy tank and a plurality of suction cylinders on land, and assembling into a jacket foundation structure in sequence;
step two, longitudinally and horizontally placing the jacket foundation structure on a semi-submersible barge, installing an upper buoyancy tank and the semi-submersible barge on the semi-submersible barge, and floating a lower buoyancy tank in water at the stern;
thirdly, hauling the jacket foundation structure to a sea site by using a semi-submersible barge;
step four, filling seawater into the lower floating box to enable the jacket foundation structure to gradually incline to launch until the jacket foundation structure is erected in the water;
and step five, gradually sinking the jacket foundation structure until the suction cylinder contacts the seabed, discharging seawater in the cylinder by using a suction pump and forming negative pressure so that the suction cylinder is inserted into the seabed in an adsorption manner.
Further, in the second step, the jacket foundation structure is installed on the semi-submersible barge by using a slide resistance device of the semi-submersible barge;
and in the fourth step, after the crane is connected with the jacket foundation structure, adjusting a sliding resistance device of the semi-submersible barge to enable the jacket foundation structure to enter water.
Further, in the fourth step, after the jacket foundation structure is erected in water, seawater is poured into the upper buoyancy tank, and the jacket foundation structure is adjusted to keep a balance state.
Has the advantages that: the jacket foundation structure of the offshore wind turbine adopts the structural form of an upper floating box, a jacket, a lower floating box and a plurality of suction cylinders which are arranged from top to bottom, and the suction cylinders can generate negative pressure adsorption force through a suction pump so as to fix the jacket foundation structure on the seabed; the design of the upper buoyancy tank and the lower buoyancy tank is utilized, the overall buoyancy of the foundation structure is improved, a semi-submersible barge can be used for horizontal floating hauling, the transportation convenience is better, the construction cost is reduced, the construction efficiency is improved, the installation and leveling difficulty of the whole jacket foundation structure is low, and subsequent recycling is facilitated.
The lower transition structure comprises a plurality of reinforcing rib plates which are arranged around the axial direction of the suction cylinder at intervals, the structural connection strength between the lower floating box and the suction cylinder is improved through the lower transition structure, and the enough fan load can be borne; moreover, the outer contours of the plurality of reinforcing ribs protrude to the outer side of the edge of the suction tube, the outward extension amount of the bottom structure is increased, and the rock embedding risk of the foundation structure is reduced in the shallow sea area of the covering layer. The bottom supporting structure of the lower buoyancy tank is matched with the seabed support, the offshore wind turbine on the upper portion can be reliably supported, and the stability of the whole foundation after installation is better.
Drawings
FIG. 1 is a schematic perspective view of a jacket infrastructure of an offshore wind turbine in an embodiment of the jacket infrastructure of an offshore wind turbine of the present invention;
FIG. 2 is a schematic front view of a jacket infrastructure of the offshore wind turbine of FIG. 1;
FIG. 3 is a schematic top view of a jacket infrastructure of the offshore wind turbine of FIG. 1;
fig. 4 is a perspective view of a lower buoyancy tank and bottom support structure of an embodiment of a jacket infrastructure of an offshore wind turbine of the present invention.
In the figure: 1-upper buoyancy tank, 10-upper transition structure;
2-jacket, 20-vertical rod, 21-X type support rod and 22-horizontal support rod;
3-lower buoyancy tank, 30-sealed corner cabin, 31-suction pump and 4-suction cylinder;
5-lower transition structure, 50-reinforcing rib plate, 6-bottom supporting structure and 60-supporting rib plate.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In embodiment 1 of the jacket foundation structure of the offshore wind turbine according to the present invention, as shown in fig. 1 to 4, the jacket foundation structure of the offshore wind turbine includes an upper buoyancy tank 1, a jacket 2, a lower buoyancy tank 3, and a plurality of suction tubes 4, which are arranged from top to bottom, and the jacket 2 is fixedly connected between the lower buoyancy tank 3 and the upper buoyancy tank 2; the plurality of suction cylinders 4 are respectively installed at the lower portion of the lower buoyancy tank 3, a suction pump 31 is installed in the lower buoyancy tank 3, and the suction pump 31 communicates with the suction cylinders 4 to suck the suction cylinders 4 to a negative pressure state.
A lower transition structure 5 is arranged between the lower buoyancy tank 3 and the suction tube 4, the lower transition structure 5 comprises a plurality of reinforcing rib plates 50 with narrow top and wide bottom, the plurality of reinforcing rib plates 50 are arranged at intervals in the circumferential direction around the axis of the suction tube 4, and the outer contours of the plurality of reinforcing rib plates 50 protrude to the outer side of the edge of the suction tube 4; the downside of lower flotation tank 3 still is equipped with bottom sprag structure 6, and bottom sprag structure 6 distributes with lower transition structure 5 staggers, and bottom sprag structure 6 is used for supporting the cooperation with the seabed.
The jacket foundation structure of the offshore wind turbine adopts the structural form of an upper floating box 1, a jacket 2, a lower floating box 3 and a plurality of suction cylinders 4 which are arranged from top to bottom, and the suction cylinders 4 can generate negative pressure adsorption force through a suction pump 31 so as to fix the jacket foundation structure on the seabed; the double-floating-box design of the upper floating box 1 and the lower floating box 3 is utilized, the overall buoyancy of the foundation structure is improved, a semi-submersible barge can be used for horizontal floating hauling, the transportation convenience is better, the construction cost is reduced, the construction efficiency is improved, the installation and leveling difficulty of the whole jacket foundation structure is low, and subsequent recycling is facilitated.
The lower transition structure 5 comprises a plurality of reinforcing rib plates 50 which are arranged around the axial direction of the suction barrel 4 at intervals, the structural connection strength between the lower floating box 3 and the suction barrel 4 is improved through the lower transition structure 5, and the enough fan load can be borne; moreover, the outer contour of the plurality of reinforcing ribs 50 protrudes outside the edge of the suction tube 4, increasing the outward extension of the substructure, reducing the risk of rock-socketing of the substructure in shallow sea areas. The bottom support structure 6 of the lower buoyancy tank 3 is matched with the seabed support, so that the offshore wind turbine at the upper part can be reliably supported, and the stability of the whole foundation after installation is better.
The jacket 2 comprises at least three upright rods 20, X-shaped support rods 21 and horizontal support rods 22, wherein the X-shaped support rods 21 are in X-shaped cross connection and are fixedly connected between two adjacent upright rods 20, and the horizontal support rods 22 are fixedly connected between two adjacent upright rods 20 and are connected with the end parts of the X-shaped support rods 21. The vertical projection shape of the lower buoyancy tank 3 is a polygon, and the plurality of suction cylinders 4 and the lower transition structures 5 are correspondingly arranged at the lower side corners of the lower buoyancy tank 3; the bottom support structure 6 is provided in the lower middle portion of the lower buoyancy tank 3, and the bottom support structure 6 includes a plurality of support ribs 60, and the plurality of support ribs 60 are arranged at intervals in the circumferential direction with respect to the center of the lower buoyancy tank 3.
In the embodiment, the jacket 2 adopts a three-upright structural form, the structural strength of the jacket is improved by the X-shaped support rod 21 and the horizontal support rod 22, correspondingly, the vertical projection shape of the lower buoyancy tank 3 is triangular, and the three uprights 2 of the jacket 2 are respectively connected to three corners of the lower buoyancy tank 3; also, the suction cylinders 4 and the lower transition structure 5 are provided three each, and the three suction cylinders 4 are arranged at three corners of the lower buoyancy tank 3, respectively.
In order to meet different use requirements, in other embodiments, the jacket can be designed into structures such as four vertical rods, five vertical rods or six vertical rods, and correspondingly, the vertical projection shape of the lower buoyancy tank is quadrilateral, pentagonal or hexagonal, and the vertical rods of the jacket are respectively connected to corresponding corners of the lower buoyancy tank; moreover, the suction tube and the lower transition structure are respectively provided with four, five or six, and the suction tube and the lower transition structure are arranged at corresponding corners of the lower buoyancy tank.
The plurality of reinforcing ribs 50 of the lower transition structure 5 are distributed in a central symmetry manner about the central axis of the suction tube 4, the reinforcing ribs 50 are in the shape of right triangles, first right-angle edges of the plurality of reinforcing ribs 50 extend along the axial direction of the suction tube 4 and are fixedly connected together, and second right-angle edges of the plurality of reinforcing ribs 50 are fixedly connected to the upper side surface of the suction tube 4. The bevel edges of the plurality of reinforcing ribs 50 of the lower transition structure 5 form an umbrella shape, and the contact area between the lower transition structure 5 and the suction barrel 4 is larger, so that the structural strength of the lower transition structure and the suction barrel is higher.
Specifically, the suction tube 4 is cylindrical, the length of the second right-angle side of the reinforcing rib 50 is greater than the radius of the suction tube 4 and smaller than the diameter of the suction tube 4, and the second right-angle side of the reinforcing rib 50 protrudes to the outside of the suction tube 4, so that a greater outward expansion amount is generated.
The top angle of the lower buoyancy tank 3 is also provided with a sealed corner cabin 30, the suction pump 31 is installed inside the sealed corner cabin 30, and the sealed corner cabin 30 is a dry sealed cabin, so that the safe and reliable work of the suction pump 31 can be ensured. And, the top of jacket 2 still is equipped with transition structure 10, goes up transition structure 10 fixed connection in last flotation tank 1's the outside, goes up transition structure 10 and is used for supplying fan tower section of thick bamboo fixed mounting. In addition, the upper and lower buoyancy tanks can be replaced by rigid buoyancy tanks or floating air bag structures.
The construction method of the jacket foundation structure of the offshore wind turbine comprises the following steps:
step one, prefabricating an upper buoyancy tank, a jacket, a lower buoyancy tank and a plurality of suction cylinders on land, and assembling into a jacket foundation structure in sequence; the method specifically adopts a welding mode for assembly, a sealed corner cabin is built at the corner of the lower floating box, and a suction pump is installed in the sealed corner cabin, so that the sealed corner cabin is ensured to be well sealed.
Step two, longitudinally and horizontally placing the jacket foundation structure on a semi-submersible barge, installing an upper buoyancy tank and the semi-submersible barge on the semi-submersible barge, floating a lower buoyancy tank in the water at the stern, namely lapping the upper buoyancy tank of the jacket foundation structure on the semi-submersible barge, floating the lower buoyancy tank in the water at the stern, and floating the whole jacket foundation structure in the water by means of front and rear buoyancy; specifically, the jacket foundation structure is installed on the semi-submersible barge by using a sliding resistance device of the semi-submersible barge, and air is injected into the upper buoyancy tank and the lower buoyancy tank, so that the jacket foundation structure can generate larger buoyancy and the bearing capacity of the semi-submersible barge is reduced.
And step three, hauling the jacket foundation structure to the offshore site by using a semi-submersible barge.
Step four, filling seawater into the lower floating box to enable the jacket foundation structure to gradually incline to launch until the jacket foundation structure is erected in the water; specifically, after the crane is connected with the jacket foundation structure, the sliding resistance device of the semi-submersible barge is adjusted to enable the jacket foundation structure to enter water, after the jacket foundation structure is erected in the water, seawater is filled into the upper buoyancy tank, and the jacket foundation structure is adjusted to keep a balanced state.
And step five, enabling the jacket foundation structure to gradually sink until the suction cylinder contacts the seabed, discharging seawater in the cylinder by using a suction pump and forming negative pressure, and enabling the suction cylinder to be inserted into the seabed in an adsorption manner.
The specific embodiment of the method for constructing a jacket foundation structure of an offshore wind turbine according to the present invention is the same as the specific embodiment of the method for constructing a jacket foundation structure in the specific embodiment of the jacket foundation structure of an offshore wind turbine according to the present invention, and will not be described herein again.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A jacket foundation structure of an offshore wind turbine is characterized by comprising an upper floating box, a jacket, a lower floating box and a plurality of suction tubes, wherein the upper floating box, the jacket, the lower floating box and the suction tubes are arranged from top to bottom;
the plurality of suction cylinders are respectively arranged at the lower part of the lower floating box, a suction pump is arranged in the lower floating box and communicated with the suction cylinders so as to suck the suction cylinders to a negative pressure state;
a lower transition structure is arranged between the lower buoyancy tank and the suction tube, the lower transition structure comprises a plurality of reinforcing rib plates with narrow tops and wide bottoms, the plurality of reinforcing rib plates are arranged around the axis of the suction tube at intervals in the circumferential direction, and the outer contours of the plurality of reinforcing rib plates protrude to the outer side of the edge of the suction tube;
the lower side of the lower buoyancy tank is also provided with a bottom supporting structure, the bottom supporting structure and the lower transition structure are distributed in a staggered mode, and the bottom supporting structure is used for being matched with a seabed support.
2. The jacket foundation structure of the offshore wind turbine as recited in claim 1, wherein the jacket comprises at least three vertical rods, X-shaped support rods and horizontal support rods, the X-shaped support rods are fixedly connected between two adjacent vertical rods in an X-shaped cross manner, and the horizontal support rods are fixedly connected between two adjacent vertical rods and connected with the ends of the X-shaped support rods.
3. The jacket foundation structure of the offshore wind turbine as claimed in claim 2, wherein the lower buoyancy tank has a polygonal vertical projection, and the plurality of suction cylinders and the lower transition structure are correspondingly disposed at lower corners of the lower buoyancy tank;
the bottom support structure is arranged in the middle of the lower side of the lower buoyancy tank, and comprises a plurality of support rib plates which are circumferentially arranged at intervals relative to the center of the lower buoyancy tank.
4. The jacket foundation structure of the offshore wind turbine as claimed in claim 3, wherein the plurality of reinforcing ribs are distributed in a central symmetry manner about the central axis of the suction drum, the reinforcing ribs are shaped like right triangles, first right-angled edges of the plurality of reinforcing ribs extend in the axial direction of the suction drum and are fixedly connected together, and second right-angled edges of the plurality of reinforcing ribs are fixedly connected to the upper side surface of the suction drum.
5. The jacket infrastructure of an offshore wind turbine as recited in claim 4, wherein the suction canister is cylindrical in shape and the second leg of the reinforcing rib has a length greater than the radius of the suction canister and less than the diameter of the suction canister.
6. The jacket foundation structure of the offshore wind turbine as claimed in any one of claims 1 to 5, wherein the top corner of the lower buoyancy tank is further provided with a sealed corner chamber, and the suction pump is installed inside the sealed corner chamber.
7. The jacket foundation structure of the offshore wind turbine as claimed in any one of claims 1 to 5, wherein an upper transition structure is further arranged on the top of the jacket, the upper transition structure is fixedly connected to the outer side of the upper buoyancy tank, and the upper transition structure is used for fixedly mounting a wind turbine tower.
8. A method of constructing a jacket base structure for an offshore wind turbine according to claim 1, comprising the steps of:
step one, prefabricating an upper buoyancy tank, a jacket, a lower buoyancy tank and a plurality of suction cylinders on land, and assembling into a jacket foundation structure in sequence;
step two, longitudinally and horizontally placing the jacket foundation structure on a semi-submersible barge, installing an upper buoyancy tank and the semi-submersible barge on the semi-submersible barge, and floating a lower buoyancy tank in water at the stern;
thirdly, hauling the jacket foundation structure to a sea site by using a semi-submersible barge;
step four, filling seawater into the lower floating box to enable the jacket foundation structure to gradually incline to launch until the jacket foundation structure is erected in the water;
and step five, gradually sinking the jacket foundation structure until the suction cylinder contacts the seabed, discharging seawater in the cylinder by using a suction pump and forming negative pressure so that the suction cylinder is inserted into the seabed in an adsorption manner.
9. The method for constructing the jacket foundation structure of the offshore wind turbine as claimed in claim 8, wherein in the second step, the jacket foundation structure is installed on the semi-submersible barge by using a slip-drag device of the semi-submersible barge;
and in the fourth step, after the crane is connected with the jacket foundation structure, adjusting a sliding resistance device of the semi-submersible barge to enable the jacket foundation structure to enter water.
10. The method of constructing a jacket base structure of an offshore wind turbine as set forth in claim 8, wherein in the fourth step, after the jacket base structure is erected in water, seawater is poured into the buoyancy tank, and the jacket base structure is adjusted to maintain a balanced state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111195911.0A CN113982025A (en) | 2021-10-13 | 2021-10-13 | Jacket foundation structure of offshore wind turbine and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111195911.0A CN113982025A (en) | 2021-10-13 | 2021-10-13 | Jacket foundation structure of offshore wind turbine and construction method thereof |
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| CN113982025A true CN113982025A (en) | 2022-01-28 |
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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 |
| CN115045324A (en) * | 2022-07-26 | 2022-09-13 | 中山大学 | Offshore wind power composite suction cylinder foundation |
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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 |
| CN115045324A (en) * | 2022-07-26 | 2022-09-13 | 中山大学 | Offshore wind power composite suction cylinder foundation |
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Application publication date: 20220128 |