CN113605394A - Offshore wind power multi-cylinder jacket foundation construction method and construction ship - Google Patents

Offshore wind power multi-cylinder jacket foundation construction method and construction ship Download PDF

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Publication number
CN113605394A
CN113605394A CN202110668511.0A CN202110668511A CN113605394A CN 113605394 A CN113605394 A CN 113605394A CN 202110668511 A CN202110668511 A CN 202110668511A CN 113605394 A CN113605394 A CN 113605394A
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China
Prior art keywords
jacket foundation
construction
construction ship
ship
suction
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CN202110668511.0A
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Chinese (zh)
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CN113605394B (en
Inventor
刘东华
丁红岩
汤东升
张浦阳
刘博�
乐丛欢
黄宣旭
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Shanghai East Ocean Engineering Technology Co ltd
China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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Shanghai East Ocean Engineering Technology Co ltd
China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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Priority to CN202110668511.0A priority Critical patent/CN113605394B/en
Publication of CN113605394A publication Critical patent/CN113605394A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/24—Foundations constructed by making use of diving-bells
    • 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
    • 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
    • E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/22—Foundations specially adapted for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Ocean & Marine Engineering (AREA)
  • Wind Motors (AREA)

Abstract

The invention belongs to the technical field of offshore wind power foundations, and discloses a construction method and a construction ship for an offshore wind power multi-cylinder jacket foundation, wherein the construction ship is provided with a middle groove along the central axis thereof, and the middle groove extends to the stern from the middle part of a ship body close to the bow and is communicated with seawater; a plurality of multi-tube jacket foundations are assembled in the middle groove, connected with a construction ship through a connecting piece capable of adjusting the length, transported as an integral structure, and can be directly installed and recovered by the construction ship. The invention saves the space for placing the multi-cylinder jacket foundation of the construction ship, can adjust the gravity center height of the construction ship through the air storage quantity of the multi-cylinder jacket foundation, and increases the applicability and stability in the transportation process; the problems of insecure connection and structural friction damage caused by binding of the steel wire rope in the traditional dry-mopping process are also avoided; the installation or recovery can improve the offshore operation efficiency, reduce the offshore operation cost and have better economic benefit.

Description

Offshore wind power multi-cylinder jacket foundation construction method and construction ship
Technical Field
The invention belongs to the technical field of offshore wind power foundations, and particularly relates to a construction method of an offshore wind power multi-cylinder jacket foundation.
Background
At present, in the field of offshore wind power, a multi-tube jacket foundation has the advantages of large adaptive water depth, simplicity and convenience in construction, lower cost and the like. The traditional multi-cylinder jacket foundation transportation and installation method is that all parts of the multi-cylinder jacket foundation are dragged to an installation sea area in a dry mode, then a crane is used for step-by-step installation, the carrying capacity of a transport ship is high, the transportation and installation cost is high, the step-by-step installation results in long offshore operation time, and the requirement on the offshore construction operation window period is high.
Disclosure of Invention
The invention aims to solve the technical problems of high construction difficulty and high cost of a multi-cylinder jacket foundation, and provides a construction method and a construction ship of an offshore wind power multi-cylinder jacket foundation, which can be used for carrying out transportation, installation and recovery of the multi-cylinder jacket foundation and a wind power complete machine thereof, do not need additional construction equipment, and have the advantages of high stability in the transportation process, simple and convenient installation and recovery operation, high construction speed and low cost.
In order to solve the technical problems, the invention is realized by the following technical scheme:
according to one aspect of the invention, a construction method of a multi-cylinder jacket foundation of offshore wind power is provided, wherein a plurality of multi-cylinder jacket foundations and a construction ship are assembled into an integral structure for transportation, installation and recovery;
the construction ship is provided with a middle groove, and the middle groove extends from the middle part of the ship body of the construction ship to the stern from the position close to the bow; the middle groove is communicated with seawater, so that the construction ship is in a U-shaped ship body with an opening at the tail part;
the multi-tube jacket foundation is assembled in the middle groove of the construction ship for transportation, and is installed and recovered from the middle groove after being transported in place; the multi-cylinder jacket foundation and the construction ship are assembled in such a way that the suction cylinders of the multi-cylinder jacket foundation are rigidly connected with the construction ship through connecting pieces, and the lengths of the connecting pieces can be adjusted;
the construction ship is characterized in that rails are respectively arranged on decks at the front part and two sides of the middle groove, and each rail is provided with a winch which can slide and brake on the rail; the winch is used for controlling the multi-cylinder jacket foundation through a cable, and the cable is connected with the suction cylinder of the multi-cylinder jacket foundation.
Further, the connecting piece comprises an adjusting part and a connecting part, wherein one end of the adjusting part is connected with the suction tube, and the other end of the adjusting part is connected with the connecting part; the adjusting part is used for adjusting the length of the connecting piece, and the connecting part is used for being fixed with the construction ship.
Furthermore, the adjusting part comprises at least two adjusting rods, each adjusting rod comprises an inner layer pipe and an outer layer pipe which are sleeved with each other, the inner layer pipe and the outer layer pipe are both provided with a plurality of adjusting holes, and the adjusting parts are arranged in different adjusting holes through adjusting bolts so that the lengths of the adjusting parts can be changed; one end of the adjusting part is welded on the suction tube, and the other end of the adjusting part is welded on the connecting part;
furthermore, the connecting part comprises a connecting plate fixed at one end of the adjusting part, and a plurality of connecting bolts are arranged on the connecting plate; connecting bolt holes corresponding to the connecting bolts are formed in the deck of the construction ship on two sides of the middle groove, and the connecting piece and the construction ship are fixed through connection of the connecting bolts and the connecting bolt holes.
Further, a plurality of the multi-jacket foundations are separated by the partition in the intermediate tank.
Furthermore, the multi-cylinder jacket foundation is connected with a fan through a tower cylinder and used as the multi-cylinder jacket foundation for integrally transporting, installing and recycling wind power.
Further, the transportation process is carried out according to the following steps:
(1) after the length of the connecting piece is adjusted, the connecting piece is welded with each suction tube of the multi-tube jacket foundation;
(2) sequentially transporting the multi-tube jacket foundation to an opening at the tail part of the construction ship;
(4) connecting a cable of the winch with a suction tube of the multi-tube jacket foundation, and drawing the multi-tube jacket foundation to the assembly position of the middle groove from the opening at the tail part of the construction ship through the winch;
(5) connecting the multi-tube jacket foundation with the construction vessel through the connecting piece; after the connection is finished, opening air valves of all connected suction cylinders of the multi-cylinder jacket foundation, and closing the air valves after the integral structure of the construction ship and the multi-cylinder jacket foundation connected with the construction ship is in self-floating balance;
(6) after all the multi-tube jacket foundations to be transported are connected with the construction ship, the construction ship and the integral structure of the multi-tube jacket foundations connected with the construction ship are subjected to floating towing, and the gravity center of the integral structure of the construction ship and the multi-tube jacket foundations connected with the construction ship is adjusted by inflating or deflating the suction tubes of the multi-tube jacket foundations during the floating towing.
Further, the specific operation of the connector connecting the multi-tube jacket foundation with the construction vessel in the step (5) is as follows: inflating the suction cylinder through the air valve, lifting the multi-cylinder jacket foundation to a position where the connecting piece is higher than the deck of the construction ship, and stopping inflating the suction cylinder; and increasing the construction vessel ballast to lower the height thereof; deflating the suction cylinder through the air valve, and connecting the suction cylinder with the construction ship through the connecting piece; and closing the gas valve and unloading the ballast of the construction ship.
Further, the installation process is carried out according to the following steps:
(1) the connection between the multi-tube jacket foundation to be installed and the construction ship is released through the connecting piece, the suction tube is inflated, and the multi-tube jacket foundation is lifted until the corresponding connecting piece completely leaves the construction ship; opening a suction cylinder air valve of the construction ship, which is connected with the multi-cylinder jacket foundation, so that the construction ship and the integral structure of the multi-cylinder jacket foundation connected with the construction ship are in self-floating balance;
(2) connecting a cable of the winch with a suction tube of the multi-tube jacket foundation, controlling the cable to rotate the multi-tube jacket foundation by 90 degrees through the winch, and enabling the multi-tube jacket foundation to be not in contact with the construction ship after the rotation;
(3) adjusting the connection between the winch and the suction barrel, deflating the suction barrel through an air valve, and controlling a cable to lower the multi-barrel jacket foundation through the winch until the multi-barrel jacket foundation sinks due to self weight;
(4) and pumping water to the suction tube to enable the multi-tube jacket foundation to be completely filled with mud.
Further, the recovery process is carried out according to the following steps:
(1) connecting a cable of the winch with a suction tube of the multi-tube jacket foundation to be recovered;
(2) pumping water to the suction cylinder, and ejecting the multi-cylinder jacket foundation out of a mud surface;
(3) lifting the multi-cylinder jacket foundation through the winch control cable, opening the air valve and then continuously lifting the multi-cylinder jacket foundation through the winch control cable when the top cover of the suction cylinder reaches the water level until the top cover of the suction cylinder reaches the deck height of the construction ship, closing the air valve and releasing the connection between the cable and the suction cylinder;
(4) opening an air valve to pump air to the suction tube, lifting the multi-tube jacket foundation to a position where the connecting piece is higher than the deck of the construction ship, closing the air valve of the suction tube, and controlling a cable to rotate the multi-tube jacket foundation by 90 degrees through the winch;
(5) deflating the suction cylinder through the air valve, connecting the multi-cylinder jacket foundation with the construction ship through the connecting piece, and closing the air valve after connection is completed; and after the connection is finished, opening air valves of suction cylinders of all the multi-cylinder jacket foundations connected with the construction ship, so that the construction ship and the integral structure of the multi-cylinder jacket foundations connected with the construction ship are in self-floating balance.
A construction vessel is provided with a middle groove, wherein the middle groove extends from the middle of a vessel body of the construction vessel to the stern near the bow; the middle groove is communicated with seawater, so that the construction ship is in a U-shaped ship body with an opening at the tail part; the middle groove is used for assembling a multi-tube jacket foundation for transportation, installation and recovery;
the construction ship is characterized in that rails are respectively arranged on decks at the front part and two sides of the middle groove, and each rail is provided with a winch which can slide and brake on the rail; the winch is used for controlling the multi-cylinder jacket foundation through a cable, and the cable is connected with the suction cylinder of the multi-cylinder jacket foundation.
The invention has the beneficial effects that:
according to the construction method and the construction ship for the offshore wind power multi-cylinder jacket foundation, the U-shaped ship body is formed by arranging the middle groove on the construction ship, the middle part of the construction ship is communicated with seawater, the multi-cylinder jacket foundation is assembled in the middle groove in the floating transportation process, the space for placing the multi-cylinder jacket foundation on the construction ship is saved, the gravity center height of the construction ship can be adjusted through the air storage amount of the multi-cylinder jacket foundation, and the applicability and the stability in the transportation process are improved;
according to the construction method and the construction ship for the offshore wind power multi-cylinder jacket foundation, each suction cylinder of the multi-cylinder jacket foundation is connected with the construction ship through the bolt in the floating transportation process, so that the stable rigid connection between the multi-cylinder jacket foundation and the construction ship is ensured, and the problems of insecure connection and structural friction damage caused by steel wire rope binding in the traditional dry towing process are solved.
And thirdly, the multi-cylinder jacket foundation is sequentially installed or recovered after the multi-cylinder jacket foundation reaches the designated sea area, and the multi-cylinder jacket foundation can be directly put down after rotating for a certain angle according to the construction requirement due to a certain distance between the suction cylinder and the two sides of the middle groove, so that the offshore operation efficiency is improved.
In conclusion, the invention generally realizes the reduction of the cost and the improvement of the efficiency of the basic transportation, installation and recovery of the offshore wind power multi-cylinder jacket, and has better economic benefit.
Drawings
FIG. 1 is a schematic diagram of a construction method of a multi-barrel jacket foundation for offshore wind power provided by the invention;
FIG. 2 is a schematic structural view of a construction vessel provided in the present invention;
FIG. 3 is a schematic view of the connection of a suction tube to a construction vessel in the construction method provided by the present invention;
FIG. 4 is a schematic structural view of a connecting member in the construction method according to the present invention;
FIG. 5 is a state diagram of a three-jacket foundation in a construction method according to the present invention before adjustment;
fig. 6 is a state diagram of the three-jacket foundation adjusted by 90 ° in the construction method provided by the present invention.
In the figure: 1. a suction drum; 2. a jacket; 3. a tower drum; 4. a fan; 5. a connecting bolt; 6. a connecting member; 7. a construction vessel; 8. a partition plate; 9. a water line surface; 10. connecting bolt holes; 11. an intermediate tank; 12. a winch; 13. a track.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in FIG. 1, the invention provides a construction method of a multi-cylinder jacket foundation of offshore wind power, which assembles a plurality of multi-cylinder jacket foundations and a construction ship 7 into an integral structure for transportation, installation and recovery, improves the precision and controllability of the construction process, reduces the requirements on offshore construction equipment, simplifies construction operation and saves construction cost.
The multi-barrel jacket foundation generally comprises 3-4 suction barrels 1, and the suction barrels 1 are connected with the jacket 2 through the barrel top reinforcing section above the suction barrels. The main body of the suction tube 1 is a steel tube and consists of a tube wall and a cover plate; the top cover is provided with an air valve, a water pump and the like. The jacket 2 is formed by welding a space truss and a transition section, the bottom of an upright post of the space truss is connected to the center of the suction barrel 1, and the transition section is used for being connected with a tower barrel. The multi-tube jacket foundation structure is high in strength and strong in bearing capacity, and has strong applicability to deep-water wind power plants.
4-8 lifting lugs are uniformly arranged on the top cover of each suction barrel 1 of the multi-barrel jacket foundation, so that the multi-barrel jacket foundation can be conveniently hoisted and position adjusted.
The construction method can also be used for sequentially connecting a tower drum 3 and a fan 4 on the basis of the multi-drum jacket, wherein the tower drum 3 is connected with the transition section at the top 1 of the jacket. Through a plurality of many barrels of jacket foundations wind-powered electricity generation complete machines of construction ship 7 transportation by floating, the complete machine transportation can be with the help of the characteristic that many barrels of jacket foundations can float and tow the boat certainly, compares with traditional dry transportation that drags, does not need large-scale ship, has saved large-scale hoisting equipment simultaneously, guarantees transportation stability, reduces the cost of transportation.
As shown in fig. 2, the construction vessel 7 is provided with an intermediate tank 11 along its central axis, i.e., the intermediate tank 11 is equidistant from the sides of the construction vessel 7; the intermediate tank 11 extends from the middle of the hull to the stern near the bow and is in communication with the sea water, so that the construction vessel 7 forms a U-shaped hull with an open tail. The middle part of the ship body is close to the bow, and the distance between the middle part of the ship body and the bow of the construction ship 7 is 1/6-1/3 of the total length of the ship.
The multi-tube jacket foundation assembly is transported in the middle groove 11 of the construction ship 7, and can be directly installed and recovered through the middle groove 11 after being transported in place. One construction vessel 7 can transport a plurality of multi-tube jacket foundations, and the specific number of the multi-tube jacket foundations is determined according to the size of the construction vessel 7 and is generally 1-4. The multi-cylinder jacket foundations are separated by partition plates 8 in a middle groove 11 of the construction ship 7, and the partition plates 8 are equal in height to the middle groove 11 and are opened and closed. The partition plate 8 is used for separating all the multi-tube jacket foundations, so that the water flow interference generated when the rear multi-tube jacket foundation is towed by the front multi-tube jacket foundation during transportation can be reduced, the stability during transportation is enhanced, and the collision between the multi-tube jacket foundations caused by accidents can be avoided, and the loss is reduced.
In this embodiment, 2 complete wind power machines of the multi-cylinder jacket foundation are transported by floating on a construction ship 7 as an example, and the 2 complete wind power machines of the multi-cylinder jacket foundation are respectively a three-cylinder jacket foundation and a four-cylinder jacket foundation.
As shown in fig. 3, each suction tube 1 of the multi-tube jacket foundation is rigidly connected with a connecting piece 6 through a bolt 5, and the length of the connecting piece 6 can be adjusted.
As shown in fig. 4, the connection member 6 between each suction tube 1 and the construction vessel 7 includes an adjustment portion and a connection portion fixedly provided at one end of the adjustment portion.
The adjusting part can be formed by two symmetrical connecting rods connected with the adjusting rod of the suction tube 1, the adjusting rod comprises an inner double-layer tube and an outer double-layer tube which are mutually sleeved, the inner layer tube and the outer layer tube are provided with a plurality of adjusting holes which are arranged at equal intervals, and the adjusting part can be installed in different adjusting holes through adjusting bolts to adjust the length of the connecting piece 6. One end of the inner layer pipe is welded on the wall of the suction tube 1, and the other end of the inner layer pipe is connected with the outer layer pipe through an adjusting bolt; one end of the outer layer pipe is connected with the inner layer pipe through an adjusting bolt, and the other end of the outer layer pipe is welded with the connecting part.
The connecting part may be constituted by a connecting plate on which a plurality of uniformly distributed connecting bolts 5 are mounted. Corresponding to the connecting plates, a plurality of connecting bolt holes 10 are uniformly distributed on the deck of the construction ship 7 on two sides of the middle groove 11. The connection of the suction tube 1 to the construction vessel 7 is accomplished by inserting the connection bolts 5 into the connection bolt holes 10 of the connection part and the deck of the construction vessel 7. Therefore, the length expansion of the adjusting part can adapt to the connection of the multi-tube jacket foundations with different numbers of suction tubes 1 and different sizes with the construction ship 7 in the middle groove 11, the multi-tube jacket foundations are fixed in the middle groove 11, and the stability of the foundations in the transportation process is enhanced.
According to the above connection manner, the suction tube 1 has a certain distance from both side surfaces of the intermediate tank 11, and the multi-tube jacket foundation can be directly installed and recovered by rotating inside the intermediate tank 11, as shown in fig. 4 and 5, which are state diagrams before and after the adjustment of 90 ° for the three-tube jacket foundation, respectively.
The construction vessel 7 is provided with one rail 13 (three rails 13 in total) on the deck at the front and both sides of the middle tank 11, and two winches 12 (six winches 12 in total) are installed on each rail 13. The bottom of the winch 12 is provided with a sliding block and is connected with the track 13 through the sliding block, and the winch 12 can slide on the track 13 through the sliding block and can be fixed in position through the braking device. In this way, the position of the hoist 12 can be adjusted on the track 13 to account for the lowering of a variety of multi-jacket foundations, depending on the size and position of the multi-jacket foundation.
The construction method of the offshore wind power multi-cylinder jacket foundation can carry out the following processes of transportation, installation and recovery:
the method comprises the following steps of (I) transporting a plurality of multi-tube jacket foundations through the construction ship 7:
(1) closing the air valve and the water pump of each suction tube 1 in the multi-tube jacket foundation, checking the air tightness of each suction tube 1, and ensuring that the suction tube 1 has good tightness;
(2) and (3) after the length of the connecting piece 6 is adjusted according to the size of the multi-tube jacket foundation, welding the connecting piece 6 with each suction tube 1 of the multi-tube jacket foundation. The length of the connecting piece 6 is adjusted to ensure that the connecting bolt 5 can be just clamped in the connecting bolt hole 10 after the connecting piece 6 is welded with each suction tube 1 of the multi-tube jacket foundation.
(3) And sequentially transporting the multi-tube jacket foundations floating in the wharf to the opening at the tail part of the construction ship 7, and opening the partition plates 8 in the middle groove 11 of the construction ship 7.
(4) And (3) connecting a cable of a winch 12 with a lifting lug of a suction barrel 1 of a first multi-barrel jacket foundation, and drawing the first multi-barrel jacket foundation to the first position of the middle groove 11 from the opening at the tail part of the construction ship 7 through the winch 12.
(5) Inflating each suction tube 1 of the first multi-tube jacket foundation to lift the multi-tube jacket foundation to a position that a connecting piece 6 is higher than a deck of a construction ship 7, and closing an air valve to stop inflating the suction tubes 1; and the height of the construction vessel 7 is lowered by adding ballast to the construction vessel 7. Aligning the connecting bolt 5 with the connecting bolt hole 10, then opening the air valve to deflate the suction barrel 1, enabling the bolt 5 to completely enter the bolt hole 10, screwing the bolt 5, and closing the air valve of the suction barrel 1. After the first multi-tube jacket foundation is connected, the air valve of the suction tube 1 is opened, the ballast of the construction ship 7 is removed, and after the construction ship 7 and the integral structure of the multi-tube jacket foundation connected with the construction ship are in self-floating balance, the air valve of the suction tube 1 is closed.
(6) And closing the partition plate 8, connecting a cable of the winch 12 with a lifting lug of the suction barrel 1 of the second multi-barrel jacket foundation, and pulling the second multi-barrel jacket foundation to a second position of the hull middle groove 11 from the opening at the tail part of the construction ship 7 through the winch 12.
(7) And (5) connecting the second multi-tube jacket foundation with the construction ship 7 in the same manner as the step (5). Inflating each suction tube 1 of the second multi-tube jacket foundation to enable the multi-tube jacket foundation to be lifted to a deck, higher than a construction ship 7, of the connecting piece 6, and closing the air valve to stop inflating the suction tubes 1; and the height of the construction vessel 7 is lowered by adding ballast to the construction vessel 7. Aligning the connecting bolt 5 with the connecting bolt hole 10, then opening the air valve to deflate the suction barrel 1, enabling the bolt 5 to completely enter the bolt hole 10, screwing the bolt 5, and closing the air valve of the suction barrel. And after the connection of the second multi-tube jacket foundation is completed, opening the air valve of the suction tube 1, unloading the ballast of the construction ship 7, and closing the air valve of the suction tube 1 after the construction ship 7 is in self-floating balance with the integral structure of the multi-tube jacket foundation connected with the construction ship.
(8) And by analogy, until all the multi-cylinder jacket foundations are connected with the construction ship 7, the two adjacent multi-cylinder jacket foundations are separated by the partition plate 8 arranged in the middle groove 11 of the construction ship 7. .
(9) And carrying out floating towing on the whole structure of the construction ship 7 and the multi-tube jacket foundation connected with the construction ship.
When the channel becomes shallow, the air valves are used for inflating all the suction cylinders 1 of the multi-cylinder jacket foundation, so that the gravity center of the integral structure is raised, the requirement on the water depth of the channel is lowered, and the applicability is improved. When the storm is large, the air valve can be opened to release the gas in each suction tube 1 of all multi-tube jacket foundations, so that the gravity center of the whole structure is lowered, and the stability of the transportation process is improved.
(II) after transporting the integral structure of the construction ship 7 and the multi-cylinder jacket foundation connected with the construction ship to an installation site, sequentially installing the multi-cylinder jacket foundation according to the sequence from outside to inside, opening the corresponding partition plate 8 before installation, and installing each multi-cylinder jacket foundation according to the following steps:
(1) the connection between the multi-cylinder jacket foundation to be installed and the construction ship 7 is released by loosening the connecting bolts 5, the suction cylinder 1 is inflated, and the multi-cylinder jacket foundation to be installed is lifted until the connecting piece 6 of the multi-cylinder jacket foundation is completely separated from the deck of the construction ship 7; and opening the air valves of the suction cylinders 1 of the construction ship 7 which are connected with the multi-cylinder jacket foundation, and closing the air valves of the suction cylinders 1 which are connected with the multi-cylinder jacket foundation after the construction ship 7 is in self-floating balance with the integral structure of the multi-cylinder jacket foundation connected with the construction ship.
(2) And adjusting the position of the winch 12, connecting a cable of the winch 12 to a lifting lug of a suction barrel 1 of the multi-barrel jacket foundation to be installed, rotating the multi-barrel jacket foundation to be installed by 90 degrees by using the winch 12, and enabling the multi-barrel jacket foundation to be not in contact with the construction ship 7 after the rotation.
(3) Adjusting the position of a winch 12, adjusting the connection of the winch 12 and a lifting lug of a suction barrel 1 in a multi-barrel jacket foundation to be installed, releasing the gas in the suction barrel 1 through a gas valve, and lowering the multi-barrel jacket foundation by using the winch 12;
in the transferring process, if the multi-cylinder jacket foundation inclines, the winch 12 corresponding to the suction cylinder 1 with the lower pause position is transferred, and after the levelness of the multi-cylinder jacket foundation is adjusted to meet the construction allowable value, the multi-cylinder jacket foundation continues to be transferred until the self-weight sinking of the multi-cylinder jacket foundation is completed.
(4) And pumping water to the suction tube 1 of the multi-tube jacket foundation through a water pump, so that the multi-tube jacket foundation is completely installed into the mud.
(III) the multi-tube jacket foundation is recovered by using a construction ship 7, the multi-tube jacket foundation is sequentially recovered from inside to outside, corresponding partition plates 8 are opened before the recovery, and the recovery of each multi-tube jacket foundation is carried out according to the following steps:
(1) and adjusting the position of the winch 12, and connecting the cable of the winch 12 to a lifting lug of the suction barrel 1 of the multi-barrel jacket foundation to be recovered.
(2) Pumping water into the suction tube 1 of the multi-tube jacket foundation by a pumping pump, and ejecting the multi-tube jacket foundation out of a mud surface;
(3) the winch 12 is used for controlling the cable to lift the multi-cylinder jacket foundation, when the top cover of the suction cylinder 1 of the multi-cylinder jacket foundation reaches the water surface, the air valve of the suction cylinder 1 is opened, then the winch 12 is used for controlling the cable to lift the multi-cylinder jacket foundation until the top cover of the suction cylinder 1 reaches the deck height of the construction ship 7, the air valve of the suction cylinder 1 is closed, and the connection between the cable of the winch 12 and the lifting lug of the suction cylinder 1 is released.
(4) Opening an air valve to pump air into the suction cylinder 1, so that the multi-cylinder jacket foundation is lifted until the connecting piece 6 of the multi-cylinder jacket foundation is higher than a deck of a construction ship 7; closing the air valve of the suction barrel 1, reconnecting the cable of the winch 12 with the lifting lug of the suction barrel 1, rotating the multi-barrel jacket foundation by 90 degrees by using the winch 12, and aligning the connecting piece 6 of the multi-barrel jacket foundation after rotation with the position of the connecting bolt hole 10.
(5) And opening the air valve to deflate the suction tube 1, enabling the connecting bolt 5 to completely enter the connecting bolt hole 10 and screwing the connecting bolt 5, and closing the air valve of the suction tube 1 after connection is completed. After the connection of the first multi-tube jacket foundation is completed, the air valves of the suction tubes 1 of all the multi-tube jacket foundations connected with the construction ship 7 are opened, and after the construction ship 7 and the integral structure of the multi-tube jacket foundation connected with the construction ship are in self-floating balance, the air valves of the suction tubes 1 are closed, and the partition plate 8 is closed.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various changes and modifications within the spirit and scope of the present invention without departing from the spirit and scope of the appended claims.

Claims (10)

1. A construction method of a multi-cylinder jacket foundation of offshore wind power is characterized in that a plurality of multi-cylinder jacket foundations and a construction ship are assembled into an integral structure to be transported, installed and recycled;
the construction ship is provided with a middle groove, and the middle groove extends from the middle part of the ship body of the construction ship to the stern from the position close to the bow; the middle groove is communicated with seawater, so that the construction ship is in a U-shaped ship body with an opening at the tail part;
the multi-tube jacket foundation is assembled in the middle groove of the construction ship for transportation, and is installed and recovered from the middle groove after being transported in place; the multi-cylinder jacket foundation and the construction ship are assembled in such a way that the suction cylinders of the multi-cylinder jacket foundation are rigidly connected with the construction ship through connecting pieces, and the lengths of the connecting pieces can be adjusted;
the construction ship is characterized in that rails are respectively arranged on decks at the front part and two sides of the middle groove, and each rail is provided with a winch which can slide and brake on the rail; the winch is used for controlling the multi-cylinder jacket foundation through a cable, and the cable is connected with the suction cylinder of the multi-cylinder jacket foundation.
2. The offshore wind power multi-cylinder jacket foundation construction method according to claim 1, wherein the connecting piece comprises an adjusting part and a connecting part, one end of the adjusting part is connected with the suction cylinder, and the other end of the adjusting part is connected with the connecting part; the adjusting part is used for adjusting the length of the connecting piece, and the connecting part is used for being fixed with the construction ship.
3. The offshore wind power multi-cylinder jacket foundation construction method according to claim 1, wherein the adjusting part comprises at least two adjusting rods, each adjusting rod comprises an inner-layer pipe and an outer-layer pipe which are sleeved with each other, the inner-layer pipe and the outer-layer pipe are provided with a plurality of adjusting holes, and the adjusting part can be changed in length by installing adjusting bolts in different adjusting holes; one end of the adjusting part is welded on the suction tube, and the other end of the adjusting part is welded on the connecting part;
the connecting part comprises a connecting plate fixed at one end of the adjusting part, and a plurality of connecting bolts are arranged on the connecting plate; connecting bolt holes corresponding to the connecting bolts are formed in the deck of the construction ship on two sides of the middle groove, and the connecting piece and the construction ship are fixed through connection of the connecting bolts and the connecting bolt holes.
4. The method of claim 1, wherein a plurality of multi-cylinder jacket foundations are separated by the partition in the intermediate trough.
5. The offshore wind power multi-cylinder jacket foundation construction method as recited in claim 1, wherein the multi-cylinder jacket foundation is connected with a wind turbine through a tower, and the wind turbine is transported, installed and recycled as a multi-cylinder jacket foundation wind power whole.
6. The offshore wind power multi-barrel jacket foundation construction method according to claim 1, characterized in that the transportation process is carried out according to the following steps:
(1) after the length of the connecting piece is adjusted, the connecting piece is welded with each suction tube of the multi-tube jacket foundation;
(2) sequentially transporting the multi-tube jacket foundation to an opening at the tail part of the construction ship;
(4) connecting a cable of the winch with a suction tube of the multi-tube jacket foundation, and drawing the multi-tube jacket foundation to the assembly position of the middle groove from the opening at the tail part of the construction ship through the winch;
(5) connecting the multi-tube jacket foundation with the construction vessel through the connecting piece; after the connection is finished, opening air valves of all connected suction cylinders of the multi-cylinder jacket foundation, and closing the air valves after the integral structure of the construction ship and the multi-cylinder jacket foundation connected with the construction ship is in self-floating balance;
(6) after all the multi-tube jacket foundations to be transported are connected with the construction ship, the construction ship and the integral structure of the multi-tube jacket foundations connected with the construction ship are subjected to floating towing, and the gravity center of the integral structure of the construction ship and the multi-tube jacket foundations connected with the construction ship is adjusted by inflating or deflating the suction tubes of the multi-tube jacket foundations during the floating towing.
7. The offshore wind power multi-jacket foundation construction method of claim 6, wherein the specific operation of the connector to connect the multi-jacket foundation with the construction vessel in the step (5) is as follows: inflating the suction cylinder through the air valve, lifting the multi-cylinder jacket foundation to a position where the connecting piece is higher than the deck of the construction ship, and stopping inflating the suction cylinder; and increasing the construction vessel ballast to lower the height thereof; deflating the suction cylinder through the air valve, and connecting the suction cylinder with the construction ship through the connecting piece; and closing the gas valve and unloading the ballast of the construction ship.
8. The offshore wind power multi-cylinder jacket foundation construction method according to claim 1, characterized in that the installation process is carried out according to the following steps:
(1) the connection between the multi-tube jacket foundation to be installed and the construction ship is released through the connecting piece, the suction tube is inflated, and the multi-tube jacket foundation is lifted until the corresponding connecting piece completely leaves the construction ship; opening a suction cylinder air valve of the construction ship, which is connected with the multi-cylinder jacket foundation, so that the construction ship and the integral structure of the multi-cylinder jacket foundation connected with the construction ship are in self-floating balance;
(2) connecting a cable of the winch with a suction tube of the multi-tube jacket foundation, controlling the cable to rotate the multi-tube jacket foundation by 90 degrees through the winch, and enabling the multi-tube jacket foundation to be not in contact with the construction ship after the rotation;
(3) adjusting the connection between the winch and the suction barrel, deflating the suction barrel through an air valve, and controlling a cable to lower the multi-barrel jacket foundation through the winch until the multi-barrel jacket foundation sinks due to self weight;
(4) and pumping water to the suction tube to enable the multi-tube jacket foundation to be completely filled with mud.
9. The offshore wind power multi-cylinder jacket foundation construction method according to claim 1, characterized in that the recovery process is carried out according to the following steps:
(1) connecting a cable of the winch with a suction tube of the multi-tube jacket foundation to be recovered;
(2) pumping water to the suction cylinder, and ejecting the multi-cylinder jacket foundation out of a mud surface;
(3) lifting the multi-cylinder jacket foundation through the winch control cable, opening the air valve and then continuously lifting the multi-cylinder jacket foundation through the winch control cable when the top cover of the suction cylinder reaches the water level until the top cover of the suction cylinder reaches the deck height of the construction ship, closing the air valve and releasing the connection between the cable and the suction cylinder;
(4) opening an air valve to pump air to the suction tube, lifting the multi-tube jacket foundation to a position where the connecting piece is higher than the deck of the construction ship, closing the air valve of the suction tube, and controlling a cable to rotate the multi-tube jacket foundation by 90 degrees through the winch;
(5) deflating the suction cylinder through the air valve, connecting the multi-cylinder jacket foundation with the construction ship through the connecting piece, and closing the air valve after connection is completed; and after the connection is finished, opening air valves of suction cylinders of all the multi-cylinder jacket foundations connected with the construction ship, so that the construction ship and the integral structure of the multi-cylinder jacket foundations connected with the construction ship are in self-floating balance.
10. The construction ship is characterized in that the construction ship is provided with a middle groove, and the middle groove extends from the middle of a ship body of the construction ship to the stern from the position close to the bow; the middle groove is communicated with seawater, so that the construction ship is in a U-shaped ship body with an opening at the tail part; the middle groove is used for assembling a multi-tube jacket foundation for transportation, installation and recovery;
the construction ship is characterized in that rails are respectively arranged on decks at the front part and two sides of the middle groove, and each rail is provided with a winch which can slide and brake on the rail; the winch is used for controlling the multi-cylinder jacket foundation through a cable, and the cable is connected with the suction cylinder of the multi-cylinder jacket foundation.
CN202110668511.0A 2021-06-16 2021-06-16 Offshore wind power multi-cylinder jacket foundation construction method and construction ship Active CN113605394B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114183310A (en) * 2021-12-09 2022-03-15 天津大学 Transportation device for offshore wind power barrel type foundation
CN114291222A (en) * 2021-12-17 2022-04-08 上海惠生海洋工程有限公司 Offshore wind power generation platform, floating foundation and transportation method thereof
CN117163498A (en) * 2023-11-02 2023-12-05 上海建工（江苏）钢结构有限公司 Bracket for field-shaped offshore wind power tower transport ship and construction process thereof

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CN103332269A (en) * 2013-05-22 2013-10-02 江苏道达海上风电工程科技有限公司 Transportation and mounting ship of knapsack complete offshore wind power machine
CN106965906A (en) * 2017-02-28 2017-07-21 天津大学 A kind of marine three basic formula wind-powered electricity generation whole machine installation ships and its single step construction method
CN107128447A (en) * 2017-04-25 2017-09-05 南通欣通船舶与海洋工程设计有限公司 A kind of system of barge whole Transporting blower fan

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CN103332269A (en) * 2013-05-22 2013-10-02 江苏道达海上风电工程科技有限公司 Transportation and mounting ship of knapsack complete offshore wind power machine
CN106965906A (en) * 2017-02-28 2017-07-21 天津大学 A kind of marine three basic formula wind-powered electricity generation whole machine installation ships and its single step construction method
CN107128447A (en) * 2017-04-25 2017-09-05 南通欣通船舶与海洋工程设计有限公司 A kind of system of barge whole Transporting blower fan

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114183310A (en) * 2021-12-09 2022-03-15 天津大学 Transportation device for offshore wind power barrel type foundation
CN114183310B (en) * 2021-12-09 2023-07-28 天津大学 Conveying device for offshore wind torch type foundation
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CN117163498A (en) * 2023-11-02 2023-12-05 上海建工（江苏）钢结构有限公司 Bracket for field-shaped offshore wind power tower transport ship and construction process thereof
CN117163498B (en) * 2023-11-02 2023-12-26 上海建工（江苏）钢结构有限公司 Bracket for field-shaped offshore wind power tower transport ship and construction process thereof

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