CN115404894A - Single-pile-suction bucket wind power foundation and recovery method thereof - Google Patents
Single-pile-suction bucket wind power foundation and recovery method thereof Download PDFInfo
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- CN115404894A CN115404894A CN202211114630.2A CN202211114630A CN115404894A CN 115404894 A CN115404894 A CN 115404894A CN 202211114630 A CN202211114630 A CN 202211114630A CN 115404894 A CN115404894 A CN 115404894A
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- suction bucket
- suction
- pile
- bucket
- wind power
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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
- E02D27/10—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
- E02D27/50—Anchored foundations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
Abstract
The invention relates to a single pile-suction bucket wind power foundation which comprises a single pile and a suction bucket, wherein the single pile is of a slender tubular structure, and the suction bucket is of a hollow cylindrical structure with an opening at the bottom and a closed top; the lower end of the single pile is coaxially, hermetically and fixedly connected with the top of the suction bucket. The invention can comprehensively consider the problems of structural stability and full life cycle cost, and is a base structure which plays a role in stably supporting the upper tower frame and the hub blade structure of the fan.
Description
Technical Field
The invention relates to the technical field of offshore wind power installation, in particular to a single-pile-suction bucket wind power foundation and a recovery method thereof.
Background
Offshore wind energy resources in China are quite rich, development and utilization of offshore wind energy resources have a vital role in optimizing future energy structures in China, and meanwhile, the problems of energy shortage, environmental pollution and the like can be effectively relieved to a certain extent through development and utilization of wind energy, and the method has a wide application prospect. Offshore wind power has become an inevitable trend in future wind power development. The offshore wind turbine mainly comprises a foundation structure, a tower, an engine room, a hub and blades, and because the wind turbine is subjected to environmental loads such as wind, wave and current for a long time during operation, seabed soil at the bottom of the foundation is subjected to water flow scouring, and the offshore wind turbine belongs to a high-rise structure with large self weight, the stability of the foundation structure is related to the long-term safe operation of the wind turbine.
The existing shallow sea wind power foundation structure mainly comprises a single-pile foundation, a gravity type foundation, a suction bucket type foundation and a jacket foundation based on a single pile or a suction bucket. Among them, the gravity type foundation is not adopted domestically because of its high manufacturing and installation costs.
However, in the prior art, heavy equipment such as an impact hammer needs to be arranged on a single-pile foundation installation ship, grouting treatment needs to be performed after drilling operation, the grouting ship needs to be operated in the process, offshore construction is complex, installation cost is high, in addition, operations such as impact in the installation process can generate noise influence on underwater organisms, the equipment cannot be effectively recycled after service is finished, and ecological protection is not facilitated.
The bottom of the jacket foundation in the prior art is fixed by driving the steel pipe pile into the seabed, and besides the defects similar to the single pile foundation in the prior art, the jacket foundation also has the following defects: compared with a single-pile foundation, the foundation has larger bearing capacity, but the construction process is more complicated; the manufacturing cost of jacket structure is higher, and jacket welded part and node are more in quantity, lead to its structure atress also more complicated, easily produce fatigue damage, and later stage fortune dimension is more troublesome.
The suction bucket foundation of the prior art, in addition to having similar disadvantages as the jacket foundation of the prior art, has the following disadvantages: the whole structure is complex, and the stability of the three suction cylinders can be influenced after the three suction cylinders are washed by different degrees.
Therefore, a novel offshore wind turbine foundation structure based on the consideration of the full life cycle cost needs to be provided, and technical support is provided for the offshore wind power industry of China.
Disclosure of Invention
In view of the above problems, a first object of the present invention is to provide a wind power foundation with a single pile-suction bucket, which can comprehensively consider the structural stability and the whole life cycle cost, and is a foundation structure that stably supports the upper tower and hub blade structure of a wind turbine.
The invention also provides a method for recovering the wind power foundation of the single pile-suction bucket.
In order to realize the purpose, the invention adopts the following technical scheme:
the single-pile-suction-barrel wind power foundation comprises a single pile and a suction barrel, wherein the single pile is of a long and thin tubular structure, and the suction barrel is of a hollow cylindrical structure with an opening at the bottom and a closed top; the lower end of the single pile is coaxially, hermetically and fixedly connected with the top of the suction bucket.
The single pile-suction bucket wind power foundation is characterized in that a plurality of rib plates are preferably arranged between the lower end of the single pile and the top of the suction bucket, the plurality of rib plates are arranged around the single pile in the circumferential direction, and the rib plates are used for connecting the single pile and the suction bucket and enhancing the connection strength between the single pile and the suction bucket.
Preferably, the rib plate is of a triangular plate-shaped structure, a first right-angle side of the triangular plate-shaped structure is connected with the pipe wall of the single pile, a second right-angle side of the triangular plate-shaped structure is connected with the top of the suction bucket, and a vertex angle of the triangular plate-shaped structure opposite to the first right-angle side is abutted to the side wall of the suction bucket.
Preferably, a lifting lug is arranged at the top of the suction bucket.
The wind power foundation with the single pile and the suction bucket is characterized in that a water injection hole is preferably formed in the top of the suction bucket.
Preferably, the top of the suction bucket is provided with an exhaust hole, and the exhaust hole is used for being connected with a pump.
Preferably, the exhaust hole of the single pile-suction bucket wind power foundation is provided with an exhaust valve.
The invention relates to a method for recovering a wind power foundation with a single pile-suction bucket, which comprises the following steps:
a water injection stage: connecting a water injection hole at the top of the suction barrel with a water inlet pipe and injecting water into the suction barrel, so that the water filled inside the suction barrel is jacked up to generate vertical displacement, and is connected with a lifting lug at the top of the suction barrel through a cable to lift upwards in the water injection process;
and (3) an inflation stage: and stopping injecting water into the suction barrel when the part of the suction barrel exposed out of the seabed reaches 1/3 of the suction barrel, pumping gas into the suction barrel through the exhaust hole until the suction barrel generates vertical displacement again, slowly lifting the suction barrel through a cable until the suction barrel finishes self-floating lifting to the sea surface, and finishing the recovery of the suction barrel.
In the recovery method, preferably, when water is injected into the suction barrel until the suction barrel generates vertical displacement, the rising speed of the suction barrel is less than 0.5m/h; in the water injection stage, the auxiliary lifting force provided by the cable is 1/8-1/10 of the self weight of the suction bucket; during the inflation stage, the auxiliary lifting force provided by the cable is 1/15-1/30 of the self weight of the suction bucket.
The recovery method preferably adjusts the inclination of the suction bucket to be less than 0.5 degree by controlling the speed and the amount of water injection and air inflation during the recovery process of the suction bucket.
Due to the adoption of the technical scheme, the invention has the following advantages:
compared with the traditional fixed fan foundation, the invention has the greatest advantage that the foundation can be recycled and reused by virtue of the negative pressure characteristic of the suction bucket, so that the waste dismantling cost of the traditional waste fixed foundation can be saved, and the foundation can be recycled and reused, thereby having great economic advantages in the concept of the whole life cycle cost. Compared with the traditional single pile foundation, the structure has the advantage of stability, and has great advantages in structural characteristics and economy for the fixed shallow sea fan foundation.
Drawings
FIG. 1 is a schematic structural diagram of a single pile-suction bucket wind power foundation of the present invention;
FIG. 2 is an enlarged schematic view of the suction bucket of FIG. 1 showing the rib structure;
FIG. 3 is an enlarged schematic view of the suction bucket of FIG. 1, showing the configuration of the lifting lug;
FIG. 4 is an enlarged schematic view of the suction bucket of FIG. 1, showing the structure of the water injection holes;
FIG. 5 is an enlarged schematic view of the suction bucket of FIG. 1, showing the structure of the vent holes;
fig. 6 is a schematic top view of the suction bucket of fig. 1.
The various reference numbers in the figures are:
1-single pile; 2-a suction bucket; 3-a rib plate; 4-lifting lugs; 5-water injection hole; 6-air exhaust holes; 7-exhaust valve.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
The invention provides a single-pile-suction bucket wind power foundation which comprises a single pile and a suction bucket, wherein the single pile is of a slender tubular structure, and the suction bucket is of a hollow cylindrical structure with an opening at the bottom and a closed top; the lower end of the single pile is coaxially, hermetically and fixedly connected with the top of the suction bucket. The invention can comprehensively consider the problems of structural stability and full life cycle cost, and is a base structure which plays a role in stably supporting the upper tower and the hub blade structure of the fan.
As shown in fig. 1, the single-pile-suction bucket wind power foundation provided by the invention comprises a single pile 1 and a suction bucket 2, wherein the single pile 1 is of a slender tubular structure, and the suction bucket 2 is of a hollow cylindrical structure with an open bottom and a closed top; the lower end of the single pile 1 is coaxially, hermetically and fixedly connected with the top of the suction barrel 2, specifically, a through hole is formed in the top of the suction barrel, and the single pile 1 is inserted into the top of the through hole and sealed with the top of the suction barrel 2.
In the above embodiment, preferably, as shown in fig. 2, a plurality of rib plates 3 are arranged between the lower end of the mono pile 1 and the top of the suction bucket 2, the plurality of rib plates 3 are arranged circumferentially around the mono pile 1, and the rib plates 3 are used for connecting the mono pile 1 and the suction bucket 2 and enhancing the connection strength therebetween.
In the above embodiment, preferably, the rib plate 3 is a triangular plate-shaped structure, a first right-angle side of the triangular plate-shaped structure is connected with the pipe wall of the monopile 1, a second right-angle side of the triangular plate-shaped structure is connected with the top of the suction bucket 2, and a vertex angle of the triangular plate-shaped structure opposite to the first right-angle side is abutted with the side wall of the suction bucket 2. Thereby, the connection of the mono pile 1 and the suction bucket 2 may be made more stable.
In the above embodiment, preferably, as shown in fig. 3, the top of the suction bucket 2 is provided with two lifting lugs 4, and the two lifting lugs 4 are respectively arranged on two sides of the mono-pile 1 for the convenience of lifting.
In the above embodiment, preferably, as shown in fig. 4, the top of the suction bucket 2 is provided with a water injection hole 5 for injecting water into the suction bucket.
In the above embodiment, preferably, as shown in fig. 5, the suction bucket 2 is provided at the top thereof with the exhaust holes 6, the exhaust holes 6 being used for connection with a pump, the exhaust holes being used for discharging or charging gas into the suction bucket 2.
In the above embodiment, it is preferable that the discharge hole 6 is provided with a discharge valve 7, which is located between the discharge hole 6 and the pump, for opening and closing the discharge hole 6.
The invention provides a method for recovering a wind power foundation based on a single pile-suction bucket, which comprises the following steps:
a water injection stage: a water injection hole 5 at the top of the suction barrel 2 is connected with a water inlet pipe and injects water into the suction barrel 2, so that the water filled inside the suction barrel 2 is jacked up to generate vertical displacement, and a lifting lug 4 at the top of the suction barrel 2 is connected with a cable rope to lift upwards in the water injection process;
and (3) an inflation stage: and when the part of the suction barrel 2 exposed out of the seabed reaches 1/3 of the suction barrel, stopping injecting water into the suction barrel 2, pumping gas into the suction barrel 2 through the exhaust hole 6 until the suction barrel 2 generates vertical displacement again, slowly lifting through a cable until the suction barrel 2 finishes self-floating lifting to the sea surface, and finishing the recovery of the suction barrel 2.
In the above embodiment, preferably, when water is injected into the suction bucket 2 until the suction bucket 2 generates vertical displacement, the ascending speed of the suction bucket 2 is less than 0.5m/h; in the water injection stage, the auxiliary lifting force provided by the cable is 1/8-1/10 of the self weight of the suction bucket 2; during the inflation phase, the auxiliary lifting force provided by the cable is 1/15-1/30 of the self weight of the suction bucket 2.
In the above embodiment, it is preferable that the inclination of the suction bucket 2 is adjusted to be less than 0.5 degrees by controlling the rate and amount of water injection and air filling during the recovery of the suction bucket 2.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The single pile-suction bucket wind power foundation is characterized by comprising a single pile and a suction bucket, wherein the single pile is of a slender tubular structure, and the suction bucket is of a hollow cylindrical structure with an opening at the bottom and a closed top;
the lower end of the single pile is coaxially, hermetically and fixedly connected with the top of the suction bucket.
2. The mono-pile-suction-bucket wind power foundation of claim 1, wherein a plurality of rib plates are arranged between the lower end of the mono-pile and the top of the suction bucket, the plurality of rib plates are arranged circumferentially around the mono-pile, and the rib plates are used for connecting the mono-pile and the suction bucket and reinforcing the connection strength between the mono-pile and the suction bucket.
3. The wind power foundation with the single pile and the suction bucket as recited in claim 2, wherein the ribbed plate is of a triangular plate structure, a first right-angle side of the triangular plate structure is connected with the pipe wall of the single pile, a second right-angle side of the triangular plate structure is connected with the top of the suction bucket, and a vertex angle of the triangular plate structure opposite to the first right-angle side is abutted with the side wall of the suction bucket.
4. The mono-pile-suction bucket wind power foundation of claim 3, wherein a lifting lug is provided at the top of the suction bucket.
5. The wind power foundation with the single pile and the suction bucket as claimed in claim 4, wherein a water injection hole is formed in the top of the suction bucket.
6. The mono-pile-suction bucket wind power foundation of claim 5, wherein the top of the suction bucket is provided with vent holes for connection with a pump.
7. The mono-pile-suction bucket wind power foundation of claim 6, wherein an exhaust valve is disposed on the exhaust hole.
8. The method for recovering the wind power foundation with the single pile-suction bucket based on the claim 7 is characterized by comprising the following steps:
a water injection stage: a water injection hole at the top of the suction bucket is connected with a water inlet pipe and injects water into the suction bucket, so that the water filled in the suction bucket is jacked up to generate vertical displacement, and the water is connected with a lifting lug at the top of the suction bucket through a cable rope and lifted upwards in the water injection process;
and (3) an inflation stage: and stopping injecting water into the suction barrel when the part of the suction barrel, which is exposed out of the seabed, reaches the set position of the suction barrel, pumping gas into the suction barrel through the exhaust hole until the suction barrel generates vertical displacement again, slowly lifting the suction barrel through the cable until the suction barrel finishes self-floating lifting to the sea surface, and finishing the recovery of the suction barrel.
9. The recycling method according to claim 8, wherein when water is injected into the suction bucket until the suction bucket generates vertical displacement, the ascending speed of the suction bucket is less than 0.5m/h;
in the stage of water injection, the auxiliary lifting force provided by the cable is 1/8-1/10 of the self weight of the suction bucket;
during the inflation stage, the auxiliary lifting force provided by the cable is 1/15-1/30 of the self weight of the suction bucket.
10. The recycling method according to claim 9, wherein the inclination of the suction bucket is adjusted to be less than 0.5 degrees by controlling the rate and amount of water injection and air inflation during the recycling of the suction bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211114630.2A CN115404894A (en) | 2022-09-14 | 2022-09-14 | Single-pile-suction bucket wind power foundation and recovery method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211114630.2A CN115404894A (en) | 2022-09-14 | 2022-09-14 | Single-pile-suction bucket wind power foundation and recovery method thereof |
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| CN115404894A true CN115404894A (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211114630.2A Pending CN115404894A (en) | 2022-09-14 | 2022-09-14 | Single-pile-suction bucket wind power foundation and recovery method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999051821A1 (en) * | 1998-04-02 | 1999-10-14 | Suction Pile Technology B.V. | Marine structure |
| CN103243735A (en) * | 2013-05-11 | 2013-08-14 | 天津大学 | Prestressed concrete cylindrical foundation with oblique supports |
| CN207176720U (en) * | 2017-07-26 | 2018-04-03 | 中国电建集团华东勘测设计研究院有限公司 | The steady stake device of suction type |
| CN110016930A (en) * | 2018-12-14 | 2019-07-16 | 上海勘测设计研究院有限公司 | Offshore wind turbine single pile-suction tube combination foundation and its construction method |
| CN110172990A (en) * | 2019-05-07 | 2019-08-27 | 天津大学 | A kind of installation of offshore wind farm bucket foundation and recycling construction method |
| CN110847219A (en) * | 2019-12-18 | 2020-02-28 | 长江勘测规划设计研究有限责任公司 | Offshore booster station combined foundation consisting of single pile and suction tube |
| CN214116682U (en) * | 2020-11-12 | 2021-09-03 | 同济大学 | Offshore wind power suction barrel-single pile combined foundation |
| CN113417311A (en) * | 2021-06-16 | 2021-09-21 | 张浦阳 | Offshore wind power multi-cylinder jacket foundation construction method |
-
2022
- 2022-09-14 CN CN202211114630.2A patent/CN115404894A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999051821A1 (en) * | 1998-04-02 | 1999-10-14 | Suction Pile Technology B.V. | Marine structure |
| CN103243735A (en) * | 2013-05-11 | 2013-08-14 | 天津大学 | Prestressed concrete cylindrical foundation with oblique supports |
| CN207176720U (en) * | 2017-07-26 | 2018-04-03 | 中国电建集团华东勘测设计研究院有限公司 | The steady stake device of suction type |
| CN110016930A (en) * | 2018-12-14 | 2019-07-16 | 上海勘测设计研究院有限公司 | Offshore wind turbine single pile-suction tube combination foundation and its construction method |
| CN110172990A (en) * | 2019-05-07 | 2019-08-27 | 天津大学 | A kind of installation of offshore wind farm bucket foundation and recycling construction method |
| CN110847219A (en) * | 2019-12-18 | 2020-02-28 | 长江勘测规划设计研究有限责任公司 | Offshore booster station combined foundation consisting of single pile and suction tube |
| CN214116682U (en) * | 2020-11-12 | 2021-09-03 | 同济大学 | Offshore wind power suction barrel-single pile combined foundation |
| CN113417311A (en) * | 2021-06-16 | 2021-09-21 | 张浦阳 | Offshore wind power multi-cylinder jacket foundation construction method |
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