CN112302046A - Offshore wind power suction pile foundation additional top plate structure and installation method thereof - Google Patents
Offshore wind power suction pile foundation additional top plate structure and installation method thereof Download PDFInfo
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- CN112302046A CN112302046A CN202011378000.7A CN202011378000A CN112302046A CN 112302046 A CN112302046 A CN 112302046A CN 202011378000 A CN202011378000 A CN 202011378000A CN 112302046 A CN112302046 A CN 112302046A
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- suction pile
- suction
- top plate
- pile body
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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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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Abstract
The invention provides an offshore wind power suction pile foundation additional top plate structure and an installation method thereof, and the offshore wind power suction pile foundation additional top plate structure comprises an upper connecting structure, a suction pile connecting piece, a suction pile body, a rigid additional top plate and flexible connecting pieces, wherein the suction pile body is of a hollow structure, the lower surface of the suction pile body is open, the left end and the right end of the inner upper surface of the suction pile body are respectively provided with the flexible connecting pieces, the lower end of each flexible connecting piece is fixedly connected with the rigid additional top plate, the rigid additional top plate is arranged in the suction pile body, the upper surface of the suction pile body is provided with the suction pile connecting piece, and the suction pile connecting piece is provided with; the invention has simple structure and convenient operation, and can effectively transmit the upper load to the foundation soil body through the rigid additional top plate.
Description
Technical Field
The invention relates to the technical field of offshore wind power facility structures, in particular to an additional top plate structure of an offshore wind power suction pile foundation and an installation method thereof.
Background
Compared with onshore wind power, offshore wind power and wind resources are abundant, power generation is stable, and power grid access is convenient. The offshore wind resources with the depth of 100 meters in the sea area of 5-50 meters in China can be opened by about 5 hundred million kilowatts, and the offshore wind resources have wide development prospect.
But is influenced by complex marine environment, and the construction difficulty of offshore wind power is higher. The common foundation types at present include gravity type foundation, single pile foundation, multi-column foundation, suction pile foundation and the like. The suction pile foundation can be suitable for sea areas where seabed bedrock is buried shallowly and the traditional wind power pile foundation needs offshore rock-socketed construction, and the problems of long construction period, high risk and high construction cost of the rock-socketed pile are solved; the method can also be suitable for areas with deep seabed sludge layers and low soil bearing capacity, and avoids the defects of high processing technology requirement, insufficient capacity and insufficient applicability of the large-diameter single pile foundation; and because the suction pile foundation has low requirements on the construction window period, the construction period can be effectively shortened, the project is rapidly developed recently, and a plurality of offshore wind power plants in China adopt the foundation type.
In the prior art, the local bulge is generated on the surface of an internal soil body in the suction penetration process of a suction pile foundation, so that a top plate of the suction pile can not be effectively contacted with the internal soil body, the effect of transmitting the upper load to the foundation soil body is influenced, and grouting operation is needed after penetration is finished.
Disclosure of Invention
In view of the above, the present invention provides an offshore wind power suction pile foundation additional top plate structure capable of effectively transferring an upper load to a foundation soil body through a rigid additional top plate.
The invention is realized by adopting the following method: the utility model provides an additional roof structure of offshore wind power suction pile basis which characterized in that: including upper portion connection structure, suction stake connecting piece, suction stake body, rigidity additional roof and flexonics spare, suction stake body is open for hollow structure and lower surface, both ends all are provided with flexonics spare about the internal upper surface of suction stake, the flexonics spare lower extreme is connected and is fixed with the rigidity additional roof, just the rigidity additional roof set up in this is internal to the suction stake, suction stake body upper surface is provided with suction stake connecting piece, be provided with on the suction stake connecting piece and be used for connecting the pylon upper portion connection structure.
Further, the lower end of the tower is provided with more than three upper connecting structures, and the number of the upper connecting structures is the same as that of the suction pile bodies.
Further, the suction pile connecting piece comprises a supporting cylinder, the supporting cylinder is arranged on the upper surface of the suction pile body, a supporting plate is arranged on the upper surface of the supporting cylinder, connecting rods are arranged on the upper surface of the suction pile body and take the circle center of the supporting cylinder as a central annular array, and the upper connecting structure is arranged on the upper surface of the supporting plate.
Further, be provided with the reinforcing plate on the suction stake connecting piece, the reinforcing plate set up in suction stake body upper surface with between the backup pad, just the reinforcing plate set up in the support section of thick bamboo, the reinforcing plate is square, the solid or trompil board of triangle-shaped, is monolithic board or box girder structure, the position of arranging of reinforcing plate is the suction stake connecting piece outside or inboard.
Furthermore, a drain hole is formed in the upper end of the supporting plate, a suction pump is installed at the drain hole, and the drain hole is simultaneously formed in the corresponding top of the suction pile body.
Furthermore, the upper connecting structure and the support plate are fixedly connected in a bolt connection, welding or riveting mode.
Further, the upper connecting structure is a single column, a plurality of columns or a jacket.
Further, the flexible connecting piece is a steel wire rope, a Dyneema rope or carbon fiber.
Another object of the present invention is to provide an installation method capable of better using and installing an additional top plate structure of an offshore wind power suction pile foundation.
The method for installing the additional top plate structure of the offshore wind power suction pile foundation comprises the following steps:
step S1, when manufacturing, the suction pile body, the suction pile connecting piece and the upper connecting structure are connected into a whole by welding, and other accessory component processing and anti-corrosion coating work are completed;
step S2, suspending the rigid additional top plate in the top of the suction pile body through the flexible connecting piece;
step S3, after the combination is completed, the suction pile body is transported to a designated construction sea area position, and then the suction pile body is hoisted and sunk to the surface of the seabed;
step S4, finishing the preliminary penetration of the central suction pile body under the action of self weight, and simultaneously enabling the rigid additional top plate to move upwards in the suction pile body and keep the rigid additional top plate at the position of a mud surface all the time;
step S5, pumping out seawater inside the suction pile body through a suction pump arranged on a connecting piece at the top of the suction pile to form an internal-external pressure difference and a seepage field, and further completing penetration of the central suction pile body;
and step S6, the rigid additional top plate continuously moves upwards relative to the suction pile body and always keeps on the position of a mud surface, seawater in the suction pile body is continuously extracted, the central suction pile body sinks to the right position, and the rigid additional top plate is contacted with the top plate in the suction pile body at the moment, so that sinking is completed.
The invention has the beneficial effects that: according to the invention, the suction pile body and the rigid additional top plate are added into the device, and the rigid additional top plate can be completely contacted with a surface soil body through the self-weight sinking stage of the suction pile body; in the suction sinking stage, the suction pile body continues to sink and penetrate, the upper part of the rigid additional top plate is a flexible connecting piece, the self-weight action is always kept to be in complete contact with a surface soil body until the suction pile body sinks and penetrates in place, the upper part of the rigid additional top plate is completely attached to the suction pile connecting piece, the lower part of the rigid additional top plate is always completely removed from the surface soil body, the rigid additional top plate is added, the problem that the top plate of the suction pile body cannot be effectively contacted with the internal soil body due to local uplift generated on the surface of the internal soil body in the suction pile foundation suction penetration process is avoided, grouting operation is not needed after penetration is completed, the upper load can be effectively transmitted to the foundation soil body through the rigid additional top plate, the construction process is reduced, the.
Drawings
FIG. 1 is a schematic structural diagram of a first state of the present invention.
FIG. 2 is a schematic structural diagram of a second state of the present invention.
Fig. 3 is a schematic structural diagram of a third state of the present invention.
Fig. 4 is a schematic structural diagram of the use state of the present invention.
Fig. 5 is a sectional view in the direction of a-a.
Fig. 6 is a sectional view taken along the direction B-B.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 6, the present invention provides an embodiment: the utility model provides an additional roof structure of marine wind power suction pile basis, includes upper portion connection structure 1, suction stake connecting piece 2, suction stake body 3, rigidity additional roof 4 and flexonics spare 5, suction stake body 3 opens for hollow structure and lower surface, both ends all are provided with flexonics spare 5 about the interior upper surface of suction stake body 3, flexonics spare 5 lower extreme is connected and is fixed with rigidity additional roof 4, just rigidity additional roof 4 set up in the suction stake body 3, suction stake body 3 upper surface is provided with suction stake connecting piece 2, be provided with on the suction stake connecting piece 2 and be used for connecting pylon 6 upper portion connection structure 1. The suction pile body 3 is lifted and sunk to the surface of a seabed by workers, the primary sinking of the central suction pile body 3 is completed under the action of dead weight, meanwhile, the rigid additional top plate 4 moves upwards relative to the suction pile body 3 and is always kept at a mud surface position, then seawater inside the suction pile body 3 is pumped out through a suction pump arranged on the suction pile connecting piece 2, an internal-external pressure difference and a seepage field are formed, the sinking of the central suction pile body 3 is further performed, meanwhile, the rigid additional top plate 4 continues to move upwards relative to the suction pile body 3 and is always kept at the mud surface position, seawater inside the suction pile body 3 continues to be pumped, the suction pile body 3 sinks in place, at the moment, the rigid additional top plate 4 is in contact with the internal top plate of the suction pile connecting piece 2, and then the sinking is completed.
The rigid additional top plate 4 in the present invention can be a flat plate, a rib plate with a reinforced beam, a concrete structure, a steel structure or a permeable plate, but is not limited thereto, the rigid additional top plate 4 is located inside the suction pile body 3, the rigid additional top plate 4 is in contact with the side wall of the suction pile body 3 but can slide, and the rigid additional top plate 4 is connected with the suction pile connecting member 2 through a flexible connecting member 5.
The suction pile body 3 can be a single-cabin or multi-cabin suction pile, the upper connecting structure 1 can be vertically or obliquely connected with the suction pile connecting piece 2 at a certain angle, and the number of the flexible connecting pieces 5 is arranged according to actual conditions.
Referring to fig. 4, in an embodiment of the present invention, the lower end of the tower 6 is provided with more than three upper connection structures 1, and the number of the upper connection structures 1 is the same as that of the suction pile bodies 3. So that the tower 6 can be better supported.
Referring to fig. 1 to 4, in an embodiment of the present invention, the suction pile connecting element 2 includes a supporting cylinder 21, the supporting cylinder 21 is disposed on the upper surface of the suction pile body 3, a supporting plate 22 is disposed on the upper surface of the supporting cylinder 21, the supporting plate 22 and the upper surface of the suction pile body 3 are disposed with a connecting rod 23 in an annular array with a center of a circle of the supporting cylinder 21 as a center, and the upper connecting structure 1 is disposed on the upper surface of the supporting plate 22. So that the supporting plate 22 is supported by the supporting cylinder 21, and the connecting rod 23 supports the supporting plate 22, so that the supporting plate 22 can better support the upper connecting structure 1.
With reference to fig. 1 to 4, in an embodiment of the present invention, a reinforcing plate 24 is disposed on the suction pile connecting member 2, the reinforcing plate 24 is disposed between the upper surface of the suction pile body 3 and the supporting plate 22, and the reinforcing plate is disposed in the supporting cylinder, the reinforcing plate 24 is a square, triangular, solid or perforated plate, and is a single plate or box girder structure, and the arrangement position of the reinforcing plate 24 is outside or inside the suction pile connecting member 2. So that the suction pile body 3 and the support plate 22 can be better connected by the action of the reinforcing plate 24.
Referring to fig. 1 to 4, in an embodiment of the present invention, a drainage hole (not shown) is formed at an upper end of the support plate 22, and a suction pump is installed at the drainage hole, and the drainage hole is also disposed at a corresponding top of the suction pile body 3. After the suction pile body 3 is sunk, the seawater inside the suction pile body 3 can be pumped out under the action of the suction pump and the drain hole, so that an internal-external pressure difference and a seepage field are formed, and the sinking operation of the suction pile body 3 can be further completed.
The suction pump of the present invention is prior art and will be apparent to those skilled in the art and will not be described in detail herein.
Referring to fig. 1 to 5, in an embodiment of the present invention, the upper connecting structure 1 is fixedly connected to the supporting plate 22 by bolting, welding or riveting. So that a better fixed connection between the upper attachment structure 1 and the support plate 22 is possible.
Referring to fig. 1 to 4, in an embodiment of the present invention, the upper connecting structure 1 is a single column, a multi-column or a jacket. So that the connection and fixation with the tower 6 can be better performed.
Referring to fig. 1 to 3, in an embodiment of the present invention, the flexible connecting member 5 is a steel wire rope, a denima rope, or a carbon fiber. So that the rigid additional top plate 4 can be fixed by the action of the flexible connecting piece 5 when not sunk.
Example one
As shown in fig. 1 to 4, the upper connection structure 1 is of a three-leg jacket type, the upper connection structure 1 is connected to a suction pile connector 2, the suction pile connector 2 is connected to a lower suction pile body 3, the number of the lower suction piles is the same as that of the main legs of the upper connection structure 1, the lower suction pile comprises a suction pile body 3 and a rigid additional top plate 4, no connection member is arranged between the suction piles, and the distance between the lower suction pile and the center of the foundation is completely the same.
The method for installing the additional top plate structure of the offshore wind power suction pile foundation comprises the following steps:
step S1, when manufacturing, the suction pile body, the suction pile connecting piece and the upper connecting structure are connected into a whole by welding, and other accessory component processing and anti-corrosion coating work are completed;
step S2, suspending the rigid additional top plate in the top of the suction pile body through the flexible connecting piece;
step S3, after the combination is completed, the suction pile body is hoisted by a processing factory wharf or transported to a transport barge by a module vehicle, and after the suction pile body is transported to a designated construction sea area position, the upper suction pile body is hoisted and sunk to the surface of the seabed;
step S4, finishing the preliminary penetration of the central suction pile body under the action of self weight, and simultaneously enabling the rigid additional top plate to move upwards in the suction pile body and keep the rigid additional top plate at the position of a mud surface all the time;
step S5, pumping out seawater inside the suction pile body through a suction pump arranged on a connecting piece at the top of the suction pile to form an internal-external pressure difference and a seepage field, and further completing penetration of the central suction pile body;
and step S6, the rigid additional top plate continuously moves upwards relative to the suction pile body and always keeps on the position of a mud surface, seawater in the suction pile body is continuously extracted, the central suction pile body sinks to the right position, and the rigid additional top plate is contacted with the top plate in the suction pile body at the moment, so that sinking is completed. The internal and external pressure difference and the water discharge amount need to be controlled in the suction penetration process, and the flatness of the suction pile foundation is adjusted to meet the design requirements.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (9)
1. The utility model provides an additional roof structure of offshore wind power suction pile basis which characterized in that: including upper portion connection structure, suction stake connecting piece, suction stake body, rigidity additional roof and flexonics spare, suction stake body is open for hollow structure and lower surface, both ends all are provided with flexonics spare about the internal upper surface of suction stake, the flexonics spare lower extreme is connected and is fixed with the rigidity additional roof, just the rigidity additional roof set up in this is internal to the suction stake, suction stake body upper surface is provided with suction stake connecting piece, be provided with on the suction stake connecting piece and be used for connecting the pylon upper portion connection structure.
2. The offshore wind power suction pile foundation additional top plate structure of claim 1, wherein: the lower end of the tower is provided with more than three upper connecting structures, and the number of the upper connecting structures is the same as that of the suction pile bodies.
3. The offshore wind power suction pile foundation additional top plate structure of claim 1, wherein: the suction pile connecting piece comprises a supporting cylinder, the supporting cylinder is arranged on the upper surface of the suction pile body, a supporting plate is arranged on the upper surface of the supporting cylinder, connecting rods are arranged on the upper surface of the suction pile body and use the circle center of the supporting cylinder as a central annular array, and the upper connecting structure is arranged on the upper surface of the supporting plate.
4. The offshore wind power suction pile foundation additional top plate structure of claim 3, wherein: be provided with the reinforcing plate on the suction stake connecting piece, the reinforcing plate set up in suction stake body upper surface with between the backup pad, just the reinforcing plate set up in the support section of thick bamboo, the reinforcing plate is square, the solid or trompil board of triangle-shaped, is monolithic board or box girder structure, the arrangement position of reinforcing plate is the suction stake connecting piece outside or inboard.
5. The offshore wind power suction pile foundation additional top plate structure of claim 3, wherein: the upper end of the supporting plate is provided with a drain hole, a suction pump is installed at the drain hole, and the drain hole is simultaneously formed in the corresponding top of the suction pile body.
6. The offshore wind power suction pile foundation additional top plate structure of claim 3, wherein: the upper connecting structure is fixedly connected with the supporting plate in a bolt connection, welding or riveting mode.
7. The offshore wind power suction pile foundation additional top plate structure of claim 1, wherein: the upper connecting structure is a single column, a plurality of columns or a jacket.
8. The offshore wind power suction pile foundation additional top plate structure of claim 1, wherein: the flexible connecting piece is a steel wire rope, a Dyneema rope or carbon fiber.
9. The method for installing the additional top plate structure of the offshore wind power suction pile foundation according to claim 1, characterized by comprising the following steps:
step S1, when manufacturing, the suction pile body, the suction pile connecting piece and the upper connecting structure are connected into a whole by welding, and other accessory component processing and anti-corrosion coating work are completed;
step S2, suspending the rigid additional top plate in the top of the suction pile body through the flexible connecting piece;
step S3, after the combination is completed, the suction pile body is transported to a designated construction sea area position, and then the suction pile body is hoisted and sunk to the surface of the seabed;
step S4, finishing the preliminary penetration of the central suction pile body under the action of self weight, and simultaneously enabling the rigid additional top plate to move upwards in the suction pile body and keep the rigid additional top plate at the position of a mud surface all the time;
step S5, pumping out seawater inside the suction pile body through a suction pump arranged on a connecting piece at the top of the suction pile to form an internal-external pressure difference and a seepage field, and further completing penetration of the central suction pile body;
and step S6, the rigid additional top plate continuously moves upwards relative to the suction pile body and always keeps on the position of a mud surface, seawater in the suction pile body is continuously extracted, the central suction pile body sinks to the right position, and the rigid additional top plate is contacted with the top plate in the suction pile body at the moment, so that sinking is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378000.7A CN112302046A (en) | 2020-11-30 | 2020-11-30 | Offshore wind power suction pile foundation additional top plate structure and installation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378000.7A CN112302046A (en) | 2020-11-30 | 2020-11-30 | Offshore wind power suction pile foundation additional top plate structure and installation method thereof |
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| CN112302046A true CN112302046A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011378000.7A Pending CN112302046A (en) | 2020-11-30 | 2020-11-30 | Offshore wind power suction pile foundation additional top plate structure and installation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277017A (en) * | 2021-07-22 | 2021-08-20 | 招商局重工（江苏）有限公司 | Shipping method of 8MW suction pile type jacket foundation |
| CN115059107A (en) * | 2022-06-30 | 2022-09-16 | 福建永福电力设计股份有限公司 | Grouting-free top plate structure of offshore wind power suction pile foundation and mounting method thereof |
-
2020
- 2020-11-30 CN CN202011378000.7A patent/CN112302046A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277017A (en) * | 2021-07-22 | 2021-08-20 | 招商局重工（江苏）有限公司 | Shipping method of 8MW suction pile type jacket foundation |
| CN113277017B (en) * | 2021-07-22 | 2021-09-17 | 招商局重工（江苏）有限公司 | Shipping method of 8MW suction pile type jacket foundation |
| CN115059107A (en) * | 2022-06-30 | 2022-09-16 | 福建永福电力设计股份有限公司 | Grouting-free top plate structure of offshore wind power suction pile foundation and mounting method thereof |
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