CN113047285A - Method for dismantling jacket foundation of offshore wind turbine - Google Patents
Method for dismantling jacket foundation of offshore wind turbine Download PDFInfo
- Publication number
- CN113047285A CN113047285A CN202110357218.2A CN202110357218A CN113047285A CN 113047285 A CN113047285 A CN 113047285A CN 202110357218 A CN202110357218 A CN 202110357218A CN 113047285 A CN113047285 A CN 113047285A
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- Prior art keywords
- jacket
- cutting
- full
- slewing crane
- construction
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 44
- 238000010276 construction Methods 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000005086 pumping Methods 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000010802 sludge Substances 0.000 claims description 19
- 230000009189 diving Effects 0.000 claims description 6
- 238000011990 functional testing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 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
- 238000010248 power generation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/04—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by cutting-off under water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0052—Removal or dismantling of offshore structures from their offshore location
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0091—Offshore structures for wind turbines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a method for dismantling a jacket foundation of an offshore wind turbine, which comprises the following steps of: s01, preparation before construction; s02, mud pumping construction; s03, preparation before hoisting; s04, cutting construction; s05, hoisting the jacket; and S06, finishing construction. The air route is set according to rivers, wind direction earlier before the construction, make transport ship and full-circle slewing crane ship accurate positioning near the jacket, take jacket bottom silt out afterwards, increase the loose degree of fixed position department, the follow-up lifting by crane of being convenient for, the rethread diver cuts after marking out cutting position on the steel protects a section of thick bamboo, it places in the transportation to lift by crane at last, the cutting process goes on under water, reduce the pollution to the sea area environment, whole work progress safety, it is simple and high-efficient.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of offshore wind power construction, and particularly relates to a method for dismantling a jacket foundation of an offshore wind turbine.
[ background of the invention ]
The offshore wind turbine power generation is one of the main power generation modes, the premise is that a foundation is built through a jacket and fixed on the seabed, the foundation needs to be dismantled due to the corrosion of seawater and the limitation of service life, and at present, no dismantling construction method exists.
[ summary of the invention ]
In order to solve the existing problems in the background art, the invention provides a method for dismantling a jacket foundation of an offshore wind turbine, which is safe and simple in construction process and high in dismantling efficiency.
The invention adopts the following technical scheme:
a method for dismantling a jacket foundation of an offshore wind turbine comprises the following steps:
s01, preparation before construction: the transport ship and the full-circle slewing crane ship reach a preset point near the position of the jacket to be in place, and operation preparation is well carried out;
s02, mud pumping construction: a mud pump is hoisted by the full-circle slewing crane ship to sink to the mud surface at the position of the jacket, and the mud around the bottom of the jacket is pumped out and discharged to other places of the seabed through mud pipes;
s03, preparation before lifting: a steel wire rope hung on a main hook of an arm support on the full-circle slewing crane is connected with the upper part of the jacket, and functional tests are carried out on the cutting high-pressure jet equipment and the diving equipment according to safety operation specification manuals of all equipment to ensure that the equipment can be normally used;
s04, cutting construction: a diver wears diving equipment to dive into the sea bottom, installs cutting high-pressure jet equipment, performs external cutting on the steel casing around the bottom of the jacket, retracts the cutting high-pressure jet equipment after cutting is completed, and returns to the full-circle slewing crane ship;
s05, jacket hoisting: after the jacket is hoisted by the full-circle slewing crane ship to leave the seabed and be correspondingly placed on a deck of a transport ship, workers release the steel wire rope;
and S06, finishing construction.
Further, in step S01, according to the specific position of the jacket, with reference to the water flow and wind direction, the traveling routes of the transport ship and the full-circle slewing crane ship are ejected to reach a predetermined position 5m away from the jacket, the full-circle slewing crane ship throws out four anchor lines to be fixed on the sea bottom, and the transport ship and the full-circle slewing crane ship are bound together through cables to keep relative positioning.
Further, in step S01, the four anchor lines are respectively led out from the bow and the stern of the full-swing crane ship, and the length of the anchor line is kept at 400m or more.
Further, in step S02, after the slewing crane ship lowers the mud pump near the main leg of the jacket, the diver lowers the mud pump and fixes the mud pump, and then the mud pipe is passed through the deck of the slewing crane ship, and the mud is discharged from the other side of the slewing crane ship to the seabed.
Further, in step S02, the sludge is pumped around the jacket main leg with a radius of 4m, if the desilting speed is too fast, the sludge pumping radius should be enlarged, and the measured sludge pumping depth after the desilting is at least 2 m.
Further, in step S03, the full-circle slewing crane vessel lifts the cage, the cage is stood by at least one worker, the cage is moved to a position above the jacket, the shackle is installed above the jacket, the wire rope is connected with the shackle, and then the boom is adjusted to keep the wire rope in a tension state without stress.
Further, in step S04, after the diver dives into the sea bottom, the diver cleans marine organisms attached to the steel casing, designs a cutting position, starts the cutting high-pressure jet device to perform cutting operation on the cutting position, sequentially cuts the four main legs in the same way, and after the cutting is completed, the diver checks the cutting position and returns to the full-circle slewing crane ship after the diver checks no fault.
The invention has the following beneficial effects:
the air route is set according to rivers, wind direction earlier before the construction, make transport ship and full-circle slewing crane ship accurate positioning near the jacket, take jacket bottom silt out afterwards, increase the loose degree of fixed position department, the follow-up lifting by crane of being convenient for, the rethread diver cuts after marking out cutting position on the steel protects a section of thick bamboo, it places in the transportation to lift by crane at last, the cutting process goes on under water, reduce the pollution to the sea area environment, whole work progress safety, it is simple and high-efficient.
[ description of the drawings ]
FIG. 1 is a schematic illustration of the positioning of a transport vessel and a fully slewing crane vessel in position according to the present invention;
FIG. 2 is a top plan view of a fully slewing crane vessel in position for hoisting a jacket;
fig. 3 is a front view of fig. 2.
[ detailed description ] embodiments
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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 to 3, a method for dismantling a jacket 3 foundation of an offshore wind turbine according to the present invention includes the following steps:
s01, preparation before construction: referring to fig. 1, a transport ship 1 and a full-circle slewing crane ship 2 reach a predetermined point near the location of a jacket 3 to be in place and are ready for operation; specifically, according to the specific position of the jacket 3, the running routes of the transport ship 1 and the full-circle slewing crane ship 2 are ejected out according to the conditions of water flow and wind direction, the position is in place at a preset point 35m away from the jacket, the full-circle slewing crane ship 2 throws out four anchor lines to be fixed on the sea bottom, the four anchor lines are respectively led out from the bow and the stern of the full-circle slewing crane ship 2, the length of the anchor lines is kept to be more than 400m, and the transport ship 1 and the full-circle slewing crane ship 2 are bound together through cables to keep relative positioning.
S02, mud pumping construction: the full-circle slewing crane ship 2 lifts a mud pump to sink to the mud surface of the position of the jacket 3, and mud around the bottom of the jacket 3 is pumped out and discharged to other places of the seabed through mud pipes; after the sludge pump is placed near the main leg of the jacket 3 by the full-rotation crane ship 2, a diver launches to fix the sludge pump, then a sludge pipe penetrates through the deck of the full-rotation crane ship 2, sludge is discharged into the seabed from the other side of the full-rotation crane ship 2, specifically, the sludge is pumped around the main leg of the jacket 3 as the center and the radius of the sludge pipe is 4m, the sludge pumping radius is enlarged if the sludge pumping speed is too high, the sludge pumping depth is measured to be at least 2m after sludge pumping, the sludge pumping depth needs to be measured in real time in the sludge pumping process, if the depth is not larger than 2m, the sludge is continuously pumped until the condition is met, the sludge is discharged to expose the steel protective cylinder 31 on the jacket 3, the subsequent construction is convenient, and the texture is loose after the sludge pumping is discharged, so that the subsequent hoisting operation is quicker, and the efficiency is improved.
S03, preparation before lifting: as shown in fig. 2, a steel wire rope is hung on a main hook of an upper arm support of a full-rotation crane ship 2 and is connected with the upper part of a jacket 3, and functional tests are performed on cutting high-pressure jet equipment and diving equipment according to safety operation specification manuals of all equipment to ensure that the equipment is normally usable; it should be noted that, specifically, the full-circle-slewing crane ship 2 lifts the cage, at least one worker standing on the cage moves to the position above the jacket 3, the shackle is installed above the jacket 3, the steel wire rope is connected with the shackle, and then the arm support is adjusted to keep the steel wire rope in an unstressed tensioned state, so that the situation that the jacket 3 shakes and pulls the arm support to shake is avoided, and construction accuracy and safety are guaranteed.
S04, cutting construction: a diver wears diving equipment to dive into the sea bottom, installs cutting high-pressure jet equipment, performs external cutting on the steel casing 31 around the bottom of the jacket 3, collects the cutting high-pressure jet equipment after cutting, and returns to the full-circle slewing crane ship 2; referring to fig. 3, specifically, after a diver dives into the sea bottom, the diver cleans marine organisms attached to a steel casing 31, designs a cutting position 32, starts a cutting high-pressure jet device to cut the cutting position 32, sequentially cuts four main legs in the same way, and after the cutting is finished, the diver checks the cutting position 32 and returns to the full-circle-slewing crane ship 2 after the diver checks no fault; because the cutting process is completed underwater, the pollution to the sea environment is reduced, particularly the probability of crossing the working surface is reduced, and the safety of constructors is guaranteed.
S05, hoisting a jacket 3: after the jacket 3 is lifted by the full-circle slewing crane ship 2 and is correspondingly placed on a deck of the transport ship 1 away from the seabed, a worker releases the steel wire rope.
And S06, finishing construction.
Therefore, the equipment and manpower used in the whole construction are relatively less, the cost input is reduced, the high-efficiency dismantling is carried out by a simple construction method, the pile sinking of the jacket 3 can be carried out again after the dismantling, and the continuous power generation work of the fan is kept.
The invention has the advantages that:
the air route is set according to rivers, wind direction earlier before the construction, make transport ship and full-circle slewing crane ship accurate positioning near the jacket, take jacket bottom silt out afterwards, increase the loose degree of fixed position department, the follow-up lifting by crane of being convenient for, the rethread diver cuts after marking out cutting position on the steel protects a section of thick bamboo, it places in the transportation to lift by crane at last, the cutting process goes on under water, reduce the pollution to the sea area environment, whole work progress safety, it is simple and high-efficient.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (7)
1. A method for dismantling a jacket foundation of an offshore wind turbine is characterized by comprising the following steps:
s01, preparation before construction: the transport ship and the full-circle slewing crane ship reach a preset point near the position of the jacket to be in place, and operation preparation is well carried out;
s02, mud pumping construction: a mud pump is hoisted by the full-circle slewing crane ship to sink to the mud surface at the position of the jacket, and the mud around the bottom of the jacket is pumped out and discharged to other places of the seabed through mud pipes;
s03, preparation before lifting: a steel wire rope hung on a main hook of an arm support on the full-circle slewing crane is connected with the upper part of the jacket, and functional tests are carried out on the cutting high-pressure jet equipment and the diving equipment according to safety operation specification manuals of all equipment to ensure that the equipment can be normally used;
s04, cutting construction: a diver wears diving equipment to dive into the sea bottom, installs cutting high-pressure jet equipment, performs external cutting on the steel casing around the bottom of the jacket, retracts the cutting high-pressure jet equipment after cutting is completed, and returns to the full-circle slewing crane ship;
s05, jacket hoisting: after the jacket is hoisted by the full-circle slewing crane ship to leave the seabed and be correspondingly placed on a deck of a transport ship, workers release the steel wire rope;
and S06, finishing construction.
2. The method for dismantling a jacket foundation of an offshore wind turbine as claimed in claim 1, wherein in step S01, the transportation vessel and the full-circle slewing crane vessel are ejected to a predetermined position 5m away from the jacket according to the specific position of the jacket, with reference to the current and wind direction, and are positioned, and the full-circle slewing crane vessel throws four anchor lines to be fixed on the seabed, and binds the transportation vessel and the full-circle slewing crane vessel together through cables to maintain the relative positioning.
3. The method for dismantling a jacket foundation of an offshore wind turbine as set forth in claim 2, wherein four anchor lines are led out from the bow and the stern of the full-slewing crane ship, respectively, and the length of the anchor lines is maintained at 400m or more in step S01.
4. The offshore wind turbine jacket foundation demolition method as recited in claim 1, wherein in step S02, after the slewing crane lowers the dredge pump near the main leg of the jacket, the diver is launched to fix the dredge pump, and then the mud pipe is passed through the deck of the slewing crane, and the mud is discharged from the other side of the slewing crane to the seabed.
5. The method for dismantling the jacket foundation of an offshore wind turbine as claimed in claim 4, wherein the step S02 is performed by pumping sludge around the radius of 4m centered on the main leg of the jacket, and if the desilting speed is too high, the pumping radius should be increased, and the measured pumping depth after the desilting is at least 2 m.
6. The method of claim 1, wherein in step S03, the full slewing crane vessel lifts the cage, the cage is stood by at least one worker, the cage is moved to above the jacket, the shackle is installed above the jacket, the wire rope is connected to the shackle, and the boom is adjusted to maintain the wire rope in an unstressed tensioned state.
7. The method for dismantling a jacket foundation of an offshore wind turbine as set forth in claim 1, wherein in step S04, after the diver submerges into the sea bottom, the diver cleans marine organisms attached to the steel casing, designs a cutting position, starts the cutting high-pressure jet device to perform cutting operation on the cutting position, sequentially performs the same cutting on the four main legs, and after the cutting is completed, the diver checks the cutting position, and returns to the full-circle slewing crane ship after the check is correct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110357218.2A CN113047285A (en) | 2021-04-01 | 2021-04-01 | Method for dismantling jacket foundation of offshore wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110357218.2A CN113047285A (en) | 2021-04-01 | 2021-04-01 | Method for dismantling jacket foundation of offshore wind turbine |
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| Publication Number | Publication Date |
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| CN113047285A true CN113047285A (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110357218.2A Pending CN113047285A (en) | 2021-04-01 | 2021-04-01 | Method for dismantling jacket foundation of offshore wind turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439008A (en) * | 2021-12-09 | 2022-05-06 | 天津大学 | Method for dismantling marine wind power Y-shaped single-cylinder jacket foundation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7090434B1 (en) * | 2005-05-03 | 2006-08-15 | Cross Rentals, Inc. | Caisson removal process |
| CN103373447A (en) * | 2012-04-13 | 2013-10-30 | 上海利策科技股份有限公司 | Jacket disassembling boat and jacket disassembling method |
| CN110965804A (en) * | 2019-12-18 | 2020-04-07 | 南方海上风电联合开发有限公司 | Method for dismantling offshore wind power jacket foundation |
-
2021
- 2021-04-01 CN CN202110357218.2A patent/CN113047285A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7090434B1 (en) * | 2005-05-03 | 2006-08-15 | Cross Rentals, Inc. | Caisson removal process |
| CN103373447A (en) * | 2012-04-13 | 2013-10-30 | 上海利策科技股份有限公司 | Jacket disassembling boat and jacket disassembling method |
| CN110965804A (en) * | 2019-12-18 | 2020-04-07 | 南方海上风电联合开发有限公司 | Method for dismantling offshore wind power jacket foundation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439008A (en) * | 2021-12-09 | 2022-05-06 | 天津大学 | Method for dismantling marine wind power Y-shaped single-cylinder jacket foundation |
| CN114439008B (en) * | 2021-12-09 | 2024-04-12 | 天津大学 | Dismantling method of offshore wind power Y-type single-tube jacket foundation |
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Application publication date: 20210629 |
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