CN113585316A - Offshore wind power cylinder type foundation deepwater sinking installation device and method - Google Patents

Offshore wind power cylinder type foundation deepwater sinking installation device and method Download PDF

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Publication number
CN113585316A
CN113585316A CN202110870290.5A CN202110870290A CN113585316A CN 113585316 A CN113585316 A CN 113585316A CN 202110870290 A CN202110870290 A CN 202110870290A CN 113585316 A CN113585316 A CN 113585316A
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China
Prior art keywords
foundation
sinking
cylindrical foundation
cylindrical
offshore wind
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Pending
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CN202110870290.5A
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Chinese (zh)
Inventor
刘海波
汪顺吉
陶铁铃
喻飞
邹尤
何杰
甘乐
吴司洲
刘玉亮
党莹颖
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Changjiang Institute of Survey Planning Design and Research Co Ltd
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Changjiang Institute of Survey Planning Design and Research Co Ltd
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Priority to CN202110870290.5A priority Critical patent/CN113585316A/en
Publication of CN113585316A publication Critical patent/CN113585316A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00—Caissons; Construction or placing of caissons
    • E02D23/08—Lowering or sinking caissons
    • 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
    • E02D27/44—Foundations for machines, engines or ordnance
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/52—Submerged foundations, i.e. submerged in open water

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Wind Motors (AREA)

Abstract

The invention discloses a deepwater sinking installation device for an offshore wind power cylinder type foundation. The device comprises mooring anchor cables, a buoyancy tank and a tuned mass damper; the mooring anchor cable is connected between the cylindrical foundation and the seabed; the buoyancy tank is arranged on the outer side surface of the cylindrical foundation; the tuning mass damper is positioned below the buoyancy tank and connected between the cylindrical foundation and the buoyancy tank. The invention has the advantages that the foundation can be sunk and installed in a short time, large-scale offshore operation equipment is not needed, the economy is good, and the invention is suitable for sinking and installing the offshore wind power cylindrical foundation with the water depth of more than 30 m. The invention also discloses a deepwater sinking installation method of the offshore wind power cylinder type foundation.

Description

Offshore wind power cylinder type foundation deepwater sinking installation device and method
Technical Field
The invention relates to an offshore wind power foundation installation device and method, in particular to an offshore wind power barrel type foundation deepwater sinking installation device. The invention also relates to a deepwater sinking installation method of the offshore wind power cylinder type foundation.
Background
The offshore wind power cylinder type foundation has the advantages of negative pressure sinking, no need of piling, good structural stability and the like, and is increasingly applied to offshore wind power plants near shallow sea in China. With the development of offshore wind power gradually developing to deep and open sea, after the cylindrical foundation is transported to a machine position, in the sinking process, the stability and safety of the foundation in sinking and the levelness of the foundation in the process of entering the soil can hardly meet the requirements under the action of deep water complex sea conditions. For example, the publication number is CN102926948A, and the patent name of the method for installing the offshore wind power complete machine introduces an offshore wind power complete machine installation method, but the installation ship is only suitable for inshore with shallow water depth, and the stability of the installation ship in the sinking process is difficult to ensure under the condition of deep water complex sea conditions; the patent publication No. CN111910675A, entitled "an installation device and method for a cylindrical foundation of deep-water offshore wind power", describes a special installation vessel for a cylindrical foundation of deep-water offshore wind power, which can ensure the stability and accuracy of deep-water sinking installation to a certain extent, but because of the trend of large installed capacity of a fan, the diameter of the cylindrical foundation is larger and larger, the size and the cost of the installation vessel are increased, and the cost is higher.
Therefore, it is necessary to develop an economical deep water sinking installation device and method for offshore wind power barrel type foundation.
Disclosure of Invention
The invention aims to provide a deep-water sinking installation device for an offshore wind power cylindrical foundation, which can finish sinking and installation of the cylindrical foundation in a short time, does not need large-scale offshore operation equipment, has good economical efficiency and is suitable for sinking and installation of the offshore wind power cylindrical foundation with the water depth of more than 30 m.
The invention aims to provide a deepwater sinking installation method of the offshore wind power cylindrical foundation, which has the advantages of good stability of the sinking installation of the cylindrical foundation in the deepwater sea area, simplicity and convenience in operation and cost saving.
In order to achieve the first object of the present invention, the technical solution of the present invention is: the utility model provides an offshore wind power cylinder type basis deep water installation device that sinks which characterized in that: the device comprises mooring anchor cables, a buoyancy tank and a tuned mass damper;
the mooring anchor cable is connected between the cylindrical foundation and the seabed;
the buoyancy tank is arranged on the outer side surface of the cylindrical foundation;
the tuning mass damper is positioned below the buoyancy tank and connected between the cylindrical foundation and the buoyancy tank.
In the technical scheme, a plurality of mooring anchor cables are provided; a plurality of mooring anchor ropes are circumferentially arranged on the periphery of the cylindrical foundation.
In the above technical solution, the mooring anchor line comprises an anchor chain and a sea anchor;
the lifting lug is arranged on the cylindrical foundation;
the anchor chain is connected to the sea anchor and the lifting lug.
In the technical scheme, the cylindrical foundation comprises an upper single column, a lower cylinder and an inclined strut; the upper single column is arranged on the lower cylinder body, and the inclined support is positioned between the upper single column and the lower cylinder body;
a plurality of floating boxes are arranged; the plurality of buoyancy tanks are connected pairwise and bound on the outer surface of the lower barrel;
the top of the buoyancy tank extends out of the water surface.
In the technical scheme, a rubber inflatable belt or a rubber fender is filled between the buoyancy tank and the lower cylinder.
In the above technical solution, the tuned mass damper includes a mass block, a spring, and a damper;
the mass block is hung at the lower end of the buoyancy tank;
the spring and the damper are connected with the mass block and the lower cylinder.
In order to achieve the second object of the present invention, the technical solution of the present invention is: a deepwater sinking installation method for an offshore wind power cylinder type foundation is characterized by comprising the following steps: by adopting the sinking cylinder type foundation of the deepwater sinking installation device of the offshore wind power cylinder type foundation,
the method specifically comprises the following steps of,
a. transporting the cylindrical foundation to the vicinity of a designated machine location by using a semi-submersible barge or tug boat;
b. throwing 3-12 sea anchors for mooring anchor cables around the cylindrical foundation;
c. the cylindrical foundation 1 is lowered from the sea surface, and the upward buoyancy borne by the cylindrical foundation is slightly smaller than the gravity of the cylindrical foundation and the pulling force of a mooring anchor rope through the air in the cylinder of the cylindrical foundation, so that the cylindrical foundation is sunk into the mud at a slower speed;
d. in the process of sinking the cylindrical foundation, the motion of the cylindrical foundation 1 in waves is reduced by tuning the mass damper, so that the cylindrical foundation has the minimum horizontal and vertical motion when finally touching the ground, and the seabed turbulence generated by the cylindrical foundation in the whole sinking process is stabilized and attenuated;
e. in the sinking process of the cylindrical foundation, mooring anchor cables are continuously tightened, the position requirement of the foundation is kept, and the motion response of the cylindrical foundation in waves is reduced;
f. after the bottom of the barrel body of the barrel type foundation is contacted with a mud surface, unbinding the buoyancy tank and the tuned mass damper on the periphery of the barrel wall, unbinding the mooring anchor rope fixed on the barrel type foundation, pumping water and air to the barrel body of the barrel type foundation, and realizing negative pressure sinking until a specified elevation;
g. and recovering the buoyancy tank, adjusting the tuned mass damper and mooring anchor cables, and transferring to the next place to perform sinking operation of the cylindrical foundation.
The invention has the following advantages:
the problem of the stability of the deepwater sea area cylindrical foundation sinking installation is solved, meanwhile, a cylindrical foundation installation ship specially built for deepwater is saved, simpler offshore operation equipment is adopted, even large-scale offshore operation equipment is not needed, the sinking and installation of a flat foundation are completed in shorter time, the construction cost of offshore wind power can be reduced to a great extent by reducing the time and equipment of offshore installation operation, and the method is suitable for the offshore wind power cylindrical foundation sinking installation in the water depth of more than 30 m.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a top view of the present invention.
Figure 3 is a schematic diagram of the tuned mass damper of the present invention.
In the figure, 1-cylindrical foundation, 11-upper single column, 12-lower cylinder, 13-inclined strut, 14-drainage pump, 2-mooring anchor rope, 21-anchor chain, 22-lifting lug, 23-anchor, 3-buoyancy tank, 31-cable, 32-rubber inflatable belt, 4-tuned mass damper, 41-mass block, 42-spring, 43-damping, 101-seabed mud surface and 102-seawater surface.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily understood by the description.
With reference to the accompanying drawings: an offshore wind power cylinder type foundation deep water sinking installation device comprises mooring anchor ropes 2, a buoyancy tank 3 and a tuned mass damper 4;
the mooring anchor cable 2 is connected between the cylindrical foundation 1 and the seabed;
the buoyancy tank 3 is arranged on the outer side surface of the cylindrical foundation 1;
the tuned mass damper 4 is located below the buoyancy tank 3 and connected between the cylindrical foundation 1 and the buoyancy tank 3.
Further, there are a plurality of mooring anchor lines 2; a plurality of mooring anchor lines 2 are circumferentially arranged at the periphery of the cylindrical foundation 1.
Further, the mooring anchor line 2 comprises an anchor chain 21 and a sea anchor 23;
the lifting lug 22 is arranged on the cylindrical foundation 1;
the anchor chain 21 is connected to the sea anchor 23 and the lifting lug 22, and the sea anchor 23 is fixed on the seabed mud surface 101.
Further, the cylindrical foundation 1 includes an upper single column 11, a lower cylinder 12, a diagonal brace 13, and a drain pump 14; the upper single column 11 is arranged on the lower cylinder 12, and the inclined strut 13 is positioned between the upper single column 11 and the lower cylinder 12;
a plurality of floating boxes 3 are arranged; the plurality of buoyancy tanks 3 are connected pairwise and bound on the outer surface of the lower barrel 12;
the top of the buoyancy tank 3 extends out of the sea surface 102, so that sufficient buoyancy stability is provided, and meanwhile, the buoyancy provided by the buoyancy tank is gradually increased in the process of sinking the cylinder body in water.
Further, a rubber inflatable belt or a rubber fender is filled between the buoyancy tank 3 and the lower cylinder 12, and gas with certain pressure can be filled in the inflatable rubber belt, so that the cylinder type foundation 1 and the buoyancy tank 3 are integrated tightly and can also play a role in buffering.
Further, the tuned mass damper 4 comprises a circular ring shaped mass 41, a spring 42 and a damper 43;
the mass 41 is suspended from the lower surface of the buoyancy tank 3;
the spring 42 and the damper 43 are respectively connected with the mass block 41 and the lower cylinder 12, and the tuned mass damper 4 can reduce the vibration response of the cylinder type foundation 1 when the cylinder type foundation 1 is subjected to external force such as waves and the like in the sinking process.
With reference to the accompanying drawings: a deepwater sinking installation method of an offshore wind power cylinder type foundation adopts a sinking cylinder type foundation 1 of the deepwater sinking installation device of the offshore wind power cylinder type foundation,
the method specifically comprises the following steps of,
a. transporting the cylindrical foundation 1 to the position near a designated airplane site by using a semi-submersible barge or a tugboat;
b. throwing 3-12 positioning sea anchors 23 of mooring anchor cables 2 around the cylindrical foundation 1;
c. the cylindrical foundation 1 is lowered from the sea surface, the upward buoyancy borne by the cylindrical foundation 1 is slightly smaller than the gravity of the cylindrical foundation 1 and the pulling force of the anchor cable through the air in the cylinder of the cylindrical foundation 1, and therefore the cylindrical foundation 1 can sink into the mud at a lower speed;
d. in the sinking process, the motion of the cylindrical foundation 1 in waves is reduced by tuning the mass damper 4, so that the cylindrical foundation 1 has the minimum horizontal and vertical motion when finally touching the ground, and the seabed turbulence generated by the cylindrical foundation 1 in the whole sinking process can be stabilized and attenuated;
e. in the sinking process of the cylindrical foundation 1, the anchor chains 21 of the mooring anchor ropes 2 are continuously tightened, so that the position requirement of the foundation can be maintained, and the motion response of the cylindrical foundation 1 in waves can be greatly reduced;
f. after the bottom of the cylinder body of the cylinder type foundation 1 contacts a mud surface, the buoyancy tank 3 and the tuned mass damper 4 on the periphery of the cylinder wall are unbound, the anchor chain 21 fixed on the cylinder type foundation 1 is untied, and the cylinder body of the cylinder type foundation 1 is pumped and exhausted to realize negative pressure sinking to a specified elevation;
g. and (3) recovering the buoyancy tank 3, the tuning mass damper 4 and the anchor chain 21 of the anchor chain 21, and transferring to the next place to perform the sinking operation of the cylindrical foundation 1.
Examples
The invention is explained in detail by taking the embodiment of the invention as an example for the deepwater installation of the offshore wind power cylindrical foundation, and has the same guiding function for the deepwater installation of other offshore wind power cylindrical foundations.
In this embodiment, the depth of water at the sinking installation position of a certain offshore wind power cylinder type foundation is about 35 m.
As shown in fig. 1 to 2, the deepwater installation device for the offshore wind turbine tubular foundation in the embodiment includes mooring anchor cables 2, buoyancy tanks 3, and tuned mass dampers 4.
The cylindrical foundation 1 is composed of an upper single column 11, a lower cylinder 12 and an inclined strut 13. The upper single column 11 is connected with the lower cylinder 12 through 6 inclined struts 13 which are uniformly arranged along the circumferential direction, and the height of each inclined strut 13 is 3 m; the single column 11 is of a circular variable-section steel pipe structure, is 20m high, has a variable diameter of 6-8 m, and is butted with a fan tower cylinder at the top end; the lower cylinder 12 is of a circular cylinder structure, is 10m high and 30m in diameter, is open at the bottom and is internally provided with a subdivision cavity.
The mooring anchor line 2 is composed of anchor chains 21 and anchors 23, and 6 anchor chains are also uniformly arranged in the circumferential direction and connected to lifting lugs 22 on the top of the lower cylinder 12.
The 6 annular steel flotation tanks 3 are bound outside the lower barrel 2 through the connection of two cables 31, the thickness is 1m, the inner side is 14m along the annular length, the height is adjusted according to the water depth, and the top surfaces of the flotation tanks 3 need to extend out of the sea surface 102.
A middle rubber inflatable belt 32 is filled between the floating box 3 and the lower cylinder 12, the middle rubber inflatable belt is filled with gas with certain pressure, the thickness of the inflated gas is 0.5m, the inflated gas is the same as that of the floating box 3 in the circumferential length, so that the cylindrical foundation 1 and the floating box 3 are tightly integrated, and the buffering effect can be achieved.
The tuned mass damper 4 is composed of a circular ring-shaped mass 41, a spring 42, and a damper 43, the mass 41 being suspended from the lower surface of the buoyancy tank, and the spring 42 and the damper 43 being connected to the lower cylinder 12. Tuned mass dampers 4 reduce the vibration response of the foundation to external forces such as waves during the sinking process.
The installation method of the offshore wind power cylinder type foundation deepwater installation device in the embodiment comprises the following steps:
a. transporting the cylindrical foundation 1 to the position near a designated airplane site by using a semi-submersible barge or a tugboat;
b. throwing 3-12 positioning sea anchors 23 around the cylindrical foundation 1;
c. the cylindrical foundation 1 is lowered from the sea surface, and the upward buoyancy force borne by the foundation is ensured to be slightly smaller than the gravity of the foundation and the pulling force of the mooring anchor rope 2 by the gas in the cylinder, so that the foundation can be ensured to sink into mud at a slower speed;
d. the cylindrical foundation 1 reduces the movement of the foundation in waves by tuning the mass damper 4 in the sinking process, so that the cylindrical foundation 1 has the minimum horizontal and vertical movement when finally touching the ground, and the seabed turbulence generated by the foundation in the whole sinking process can be stabilized and attenuated;
e. in the sinking process of the cylindrical foundation 1, the mooring anchor cables 2 are continuously tightened, so that the position requirement of the cylindrical foundation 1 can be maintained, and the motion response of the cylindrical foundation 1 in waves can be greatly reduced;
f. after the bottom of the cylinder body contacts a mud surface, the buoyancy tank 3 and the tuned mass damper 4 on the periphery of the cylinder wall are unbound, the anchor chain 21 fixed on the cylinder type foundation 1 is unfastened, and the cylinder body is pumped and pumped to realize negative pressure sinking until a specified elevation;
g. and (4) recovering the buoyancy tank 3, the tuned mass damper 4 and the mooring anchor rope 2, and transferring to the next place for sinking.
And (4) conclusion: the embodiment adopts simpler offshore operation equipment to complete the deepwater installation of the offshore wind power cylindrical foundation, solves the stability problem of the deepwater offshore wind power cylindrical foundation sinking installation, simultaneously saves a cylindrical foundation installation ship specially manufactured for deepwater, even does not need large-scale offshore operation equipment, completes the sinking and installation of the cylindrical foundation in shorter time, and can reduce the construction cost of offshore wind power to a great extent by reducing the time and equipment of offshore installation operation.
Example 2
The deepwater installation device and the installation method for the offshore wind power cylindrical foundation in the embodiment are the same as those in embodiment 1, and the differences are that: in this embodiment, the depth of water at the sinking installation position of the offshore wind power cylinder type foundation is about 30 m.
Example 3
The deepwater installation device and the installation method for the offshore wind power cylindrical foundation in the embodiment are the same as those in embodiment 1, and the differences are that: in this embodiment, the depth of water at the sinking installation position of the offshore wind power cylinder type foundation is about 40 m.
Example 4
The deepwater installation device and the installation method for the offshore wind power cylindrical foundation in the embodiment are the same as those in embodiment 1, and the differences are that: in this embodiment, the depth of water at the sinking installation position of the offshore wind power cylinder type foundation is about 60 m.
Other parts not described belong to the prior art.

Claims (7)

1. The utility model provides an offshore wind power cylinder type basis deep water installation device that sinks which characterized in that: comprises mooring anchor ropes (2), a buoyancy tank (3) and a tuned mass damper (4);
the mooring anchor cable (2) is connected between the cylindrical foundation (1) and the seabed;
the buoyancy tank (3) is arranged on the outer side surface of the cylindrical foundation (1);
the tuning mass damper (4) is positioned below the buoyancy tank (3) and connected between the cylindrical foundation (1) and the buoyancy tank (3).
2. The offshore wind turbine type foundation deepwater sinking installation device of claim 1, wherein: a plurality of mooring anchor ropes (2) are provided; a plurality of mooring anchor lines (2) are circumferentially arranged on the periphery of the cylindrical foundation (1).
3. The offshore wind turbine type foundation deepwater sinking installation device of claim 2, wherein: the mooring anchor cable (2) comprises an anchor chain (21) and a sea anchor (23);
the lifting lug (22) is arranged on the cylindrical foundation (1);
the anchor chain (21) is connected to the sea anchor (23) and the lifting lug (22).
4. The offshore wind turbine type foundation deepwater sinking installation device of claim 3, wherein: the cylindrical foundation (1) comprises an upper single column (11), a lower cylinder (12) and an inclined strut (13); the upper single column (11) is arranged on the lower cylinder (12), and the inclined strut (13) is positioned between the upper single column (11) and the lower cylinder (12);
a plurality of floating boxes (3) are arranged; the plurality of buoyancy tanks (3) are connected pairwise and bound on the outer surface of the lower barrel body (12);
the top of the buoyancy tank (3) extends out of the water surface.
5. The offshore wind turbine type foundation deepwater sinking installation device of claim 4, wherein: a rubber inflatable belt or a rubber fender is filled between the buoyancy tank (3) and the lower cylinder (12).
6. The offshore wind turbine type foundation deepwater sinking installation device of claim 5, wherein: the tuned mass damper (4) comprises a mass (41), a spring (42) and a damper (43);
the mass block (41) is suspended at the lower end of the buoyancy tank (3);
a spring (42) and a damper (43) connect the mass (41) and the lower cylinder (12).
7. A deepwater sinking installation method for an offshore wind power cylinder type foundation is characterized by comprising the following steps: sinking cylinder foundation (1) of an offshore wind turbine cylinder foundation deep water sinking installation device according to any of the claims 1-6,
the method specifically comprises the following steps of,
a. transporting the tubular foundation (1) to the vicinity of a designated airport location using a semi-submersible barge or tugboat;
b. throwing 3-12 sea anchors (23) for mooring anchor cables (2) around the cylindrical foundation (1);
c. the cylindrical foundation (1) is lowered from the sea surface, the upward buoyancy force borne by the cylindrical foundation (1) is slightly smaller than the gravity of the cylindrical foundation (1) and the pulling force of the anchor cable through the air release in the cylinder of the cylindrical foundation (1), and therefore the cylindrical foundation (1) is lowered into the mud at a slower speed;
d. the motion of the cylindrical foundation (1) in waves is reduced by tuning the mass damper (4) during the sinking process of the cylindrical foundation (1), so that the cylindrical foundation (1) has minimum horizontal and vertical motion during final grounding, and the seabed turbulence generated by the cylindrical foundation (1) in the whole sinking process is stabilized and attenuated;
e. in the sinking process of the cylindrical foundation (1), the mooring anchor cables (2) are continuously tightened, the position requirement of the foundation is kept, and the motion response of the cylindrical foundation (1) in waves is reduced;
f. after the bottom of the cylinder body of the cylinder type foundation (1) is contacted with a mud surface, a floating box (3) and a tuned mass damper (4) on the periphery of the cylinder wall are unbound, a mooring anchor rope (2) fixed on the cylinder type foundation (1) is untied, the cylinder body of the cylinder type foundation (1) is pumped and pumped, and negative pressure sinking is realized until a specified elevation is reached;
g. and (3) recovering the floating box (3), adjusting and tuning the mass damper (4) and mooring the anchor cable (2), and transferring to the next place to sink the cylindrical foundation (1).
CN202110870290.5A 2021-07-30 2021-07-30 Offshore wind power cylinder type foundation deepwater sinking installation device and method Pending CN113585316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110870290.5A CN113585316A (en) 2021-07-30 2021-07-30 Offshore wind power cylinder type foundation deepwater sinking installation device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110870290.5A CN113585316A (en) 2021-07-30 2021-07-30 Offshore wind power cylinder type foundation deepwater sinking installation device and method

Publications (1)

Publication Number Publication Date
CN113585316A true CN113585316A (en) 2021-11-02

Family

ID=78252437

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110870290.5A Pending CN113585316A (en) 2021-07-30 2021-07-30 Offshore wind power cylinder type foundation deepwater sinking installation device and method

Country Status (1)

Country Link
CN (1) CN113585316A (en)

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