CN108316335B - Tensioning mooring submerged floating foundation and construction method thereof - Google Patents

Tensioning mooring submerged floating foundation and construction method thereof Download PDF

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Publication number
CN108316335B
CN108316335B CN201810065128.4A CN201810065128A CN108316335B CN 108316335 B CN108316335 B CN 108316335B CN 201810065128 A CN201810065128 A CN 201810065128A CN 108316335 B CN108316335 B CN 108316335B
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mooring
foundation
connecting section
floating
anchoring
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CN108316335A (en
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乐丛欢
丁红岩
练继建
李彦娥
张浦阳
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Tianjin University
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Tianjin University
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

Abstract

The invention belongs to the technical field of offshore wind power foundations, and discloses a tension mooring submerged floating foundation and a construction method thereof, wherein the tension mooring submerged floating foundation consists of a floating platform and a mooring system, the floating platform comprises a connecting section and a floating box, and the mooring system comprises a mooring line and an anchoring foundation; respectively towing a floating platform and a mooring system with an upper fan tower drum, sinking an anchoring foundation and embedding the anchoring foundation into the seabed during construction; the upper end of the mooring line sequentially passes through the second reserved pore canal of the floating box and the first reserved pore canal of the connecting section, and the mooring line is anchored to the connecting section after sinking into place on the floating platform. The invention can provide enough floating stability in towing, and is less influenced by wave load in an in-place state; the water tensioning system is realized, and the difficulty of installing the mooring line underwater is reduced; the anchoring foundation provides pulling resistance by using the pressure load and friction resistance, and penetrates into the seabed by stacking and internal and external pressure difference, so that the construction is convenient.

Description

Tensioning mooring submerged floating foundation and construction method thereof
Technical Field
The invention belongs to the technical field of offshore wind power foundations, and particularly relates to a tension mooring submerged floating foundation and a construction method thereof, which have the advantages of good stability, convenience in construction and installation and low construction cost and installation cost.
Background
The concept of the floating foundation is derived from a deep sea oil gas development platform, namely the foundation is not in direct contact with the seabed, but is connected with the seabed through an anchor rope or a cable, so that the wind turbine generator can move freely in a certain relatively fixed area, the foundation is mainly in a research and development and demonstration stage at present, but has strong adaptability to marine environment, and compared with a implantation foundation, the floating foundation has small construction difficulty and low operation and maintenance cost, so that the floating foundation has good application prospect in the aspect of developing deep sea wind power.
Compared with offshore, the deep sea environment is harsher, various hydrologic phenomena such as ocean currents, waves, tides, internal waves and the like exist, and long-term physicochemical effects such as corrosion, scouring and elutriation are achieved, so that harsher requirements are definitely put forward on technologies such as fan foundations, submarine cables, offshore platform integration and the like. Considering the factors of technical difficulty and construction cost, the fixed foundation is not applicable any more, and the deep sea wind farm mainly adopts a floating foundation.
The main types of the existing offshore wind power floating foundation are as follows: spar, TLP, and semi-submersible foundations. The Spar type foundation has small water plane, is little influenced by wave load, is suitable for sea areas with deeper water depths, and is inconvenient to install and move; the TLP type foundation has good motion performance, adopts tension tendons for mooring, has high cost and is greatly limited by water depth; the semi-submersible foundation can float and tow, but the larger waterplane area leads the semi-submersible foundation to be greatly influenced by wave load, and the stability is poor. The foundation forms have different defects in stability and economy, and the three foundation type mooring lines are all installed underwater, so that the construction difficulty is high.
Disclosure of Invention
The invention aims to solve the technical problems that the motion response of the offshore wind power floating foundation is large under the wind wave load and the complex cost of the underwater construction process is high, and provides the tension mooring submerged floating foundation and the construction method thereof.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a construction method of a tension mooring submerged floating foundation, wherein the tension mooring submerged floating foundation consists of a floating platform and a mooring system;
the floating platform comprises a connecting section and a buoyancy tank which are both hollow structures, the upper end of the connecting section is connected with a fan tower through a flange ring, and the lower end of the connecting section is fixedly connected with the buoyancy tank; the connecting section consists of an arc-shaped connecting section at the upper part and a columnar connecting section at the lower part, wherein the arc-shaped connecting section is arranged from top to bottom in a variable cross section manner, and the wall surface of the side wall of the arc-shaped connecting section is of a concave arc shape; a plurality of first reserved holes are uniformly distributed in the circumferential direction inside the side wall of the connecting section; the floating box is internally provided with a first annular cabin dividing plate, a second annular cabin dividing plate and a plurality of radial cabin dividing plates, the first annular cabin dividing plate, the second annular cabin dividing plate and the plurality of radial cabin dividing plates divide the floating box into a plurality of cabin dividing chambers, and each cabin dividing chamber is provided with a valve system capable of replacing water and air; a plurality of second reserved pore passages are uniformly distributed between the first annular dividing plate and the second annular dividing plate in the circumferential direction, and the bottoms of the second reserved pore passages are fixedly connected with the bottom plate of the buoyancy tank; the number of the second reserved pore canals is the same as that of the first reserved pore canals, and the second reserved pore canals are correspondingly connected and communicated with the first reserved pore canals one by one;
the mooring system comprises mooring lines and an anchoring foundation, the number of the mooring lines is the same as that of the second reserved pore canals and the first reserved pore canals, the mooring lines consist of straight mooring lines and inclined mooring lines which are uniformly and annularly arranged in a staggered manner, the straight mooring lines are vertically arranged between the floating box and the anchoring foundation, and the inclined mooring lines are radially and obliquely arranged from the center to the outside from top to bottom between the floating box and the anchoring foundation; the lower ends of the mooring lines are anchored to the anchoring foundation, and the upper ends of the mooring lines sequentially pass through the second reserved pore canal and the first reserved pore canal and are anchored to the top of the connecting section; the anchoring foundation comprises a hollow anchoring plate body, wherein the inner and outer edges of the upper part of the anchoring plate body are provided with cylinder walls, and the inner and outer edges of the lower part of the anchoring plate body are provided with skirtboards;
the construction method comprises the following steps:
(1) Firstly prefabricating the floating platform and the mooring system on land, installing a fan tower on the floating platform stably, towing and transporting the floating platform with the fan tower installed to an operation sea area, towing and transporting the mooring system to the operation sea area, wherein buoy balls are arranged at the upper ends of mooring lines;
(2) Applying ballast to sink the anchoring foundation and embedding the anchoring foundation into the sea floor for fixation by stacking and internal and external pressure differences;
(3) Sequentially passing the upper end of the mooring line through the second reserved pore canal and the first reserved pore canal according to the buoy ball indication position, and pre-tensioning the mooring line by 10% -50% to enable the mooring line to be in a tensioning state so as to balance the buoyancy of the floating platform;
(4) Injecting water into the sub-cabins through a water-gas replacement valve system, so that the floating platform provided with the fan tower loses part of buoyancy and sinks, when sinking to a designed draft position, the mooring line is pre-tensioned by 50% -90% to balance the buoyancy of the floating platform, and the upper end of the mooring line is anchored at the top of the connecting section;
(5) Discharging the water body in the sub-cabins through a valve system for replacing water and air;
(6) The mooring line is brought into the water body in the second reserved pore canal and the first reserved pore canal to be discharged through high-pressure inflation, and the bottom of the buoyancy tank is sealed;
(7) And adjusting the gravity center position of the tension mooring submerged floating foundation through the sub-cabins.
Preferably, the arc-shaped connecting section and the columnar connecting section of the connecting section are integrally cast by concrete.
Preferably, the second reserved hole channel is smoothly connected with the first reserved hole channel in radian.
The number of mooring lines is 8-32, wherein the number of straight mooring lines and the number of inclined mooring lines are each half.
Preferably, the included angle between the inclined mooring line and the vertical direction is 3-60 degrees.
Preferably, buoy balls are arranged at the upper ends of the mooring lines before anchoring, and maintenance devices are arranged at each anchoring point after anchoring.
Preferably, the exposed portions of the mooring lines are each encased in a rubber sleeve.
The beneficial effects of the invention are as follows:
according to the tension mooring submerged floating foundation and the construction method thereof, the floating platform is designed by combining the connecting section with the variable cross section and the buoyancy tank with the large water plane, so that the foundation is ensured to provide enough floating stability by the buoyancy tank with the large water plane during towing, meanwhile, the fan is submerged in the water in the in-place state, the upper water plane of the connecting section with the variable cross section is less influenced by wave load, and the stability of the foundation is ensured.
According to the tension mooring submerged floating foundation and the construction method thereof, the mooring system designs the straight mooring line and the inclined mooring line, the straight mooring line provides good heave property and rotation property, and the inclined mooring line provides large horizontal constraint force, so that the motion response of the foundation in all directions is small, and the stability is good; the circumferential arrangement of mooring lines resists wave forces from all directions; the upper ends of the straight mooring line and the inclined mooring line are anchored at the top of the arc-shaped connecting section, so that an overwater tensioning system is realized, the difficulty in installing the mooring line underwater is reduced, and the construction is convenient; the straight mooring line and the inclined mooring line are made of steel stranded wires, so that the economical efficiency is good.
The anchoring foundation of the mooring system provides pulling resistance by utilizing the pressure load and the friction resistance provided by the skirt board, positions straight mooring lines and inclined mooring lines, has a structure that the upper part can be filled with sand and ballasted, the lower part is provided with the skirt board, and can be towed to an operating water area by a larger waterplane, and can penetrate into the seabed by stacking and internal and external pressure difference, so that the construction is convenient.
Drawings
FIG. 1 is a schematic perspective view of a tension mooring submerged floating foundation provided by the present invention;
FIG. 2 is a schematic illustration of the distribution of mooring lines of a tension moored submerged floating foundation provided by the present invention;
FIG. 3 is a front view of a tension moored submerged floating foundation provided by the present invention;
fig. 4 is a top view of a tension moored submerged floating foundation provided by the present invention.
In the figure: 1. the flange ring, 2, arc link, 3, column link, 4, buoyancy tank, 5, mooring line, 6, anchor basis, 7, first reserved pore, 8, second reserved pore, 9, first annular nacelle board, 10, second annular nacelle board, 11, radial nacelle board.
Detailed Description
For further understanding of the invention, the following examples are set forth to illustrate, together with the drawings, the detailed description of which follows:
as shown in fig. 1 to 4, the present embodiment discloses a tension mooring submerged floating foundation, which consists of a floating platform and a mooring system.
The floating platform comprises a connecting section and a buoyancy tank 4, wherein the connecting section is composed of an arc-shaped connecting section 2 and a columnar connecting section 3, the upper end of the arc-shaped connecting section 2 is connected with a fan tower through a flange ring 1, and the lower end of the columnar connecting section 3 is connected with the buoyancy tank 4. Considering that the weight of the cabin and the blades of the offshore wind turbine is large and 80-100 m above the water surface, in order to enable the wind turbine to generate electricity normally, the stability of the foundation under the combined action of wind and waves and the capability of resisting the wind and wave load must be ensured. The arc-shaped connecting section 2 and the columnar connecting section 3 are integrally cast by concrete, so that larger wind power load can be borne. The design of combining the variable-section connecting section and the large water plane buoyancy tank 4 is that the large water plane buoyancy tank 4 provides enough floating stability to realize the integral floating and towing of the floating platform, the tower and the fan, and the installation and the transportation are convenient; and when in an in-place state, the buoyancy tank 4 is submerged below the water surface, the upper part of the connecting section with the variable cross section is positioned on the water surface, the water plane is smaller, and the influence of wave load is reduced.
The upper flange ring 1 has a diameter of 6.6m, a height of 4m and a wall thickness of 50mm. The arc-shaped connecting section 2 is of a hollow cylindrical structure with a certain wall thickness and a concave arc-shaped wall surface, the arc-shaped connecting section is arranged from top to bottom in a variable cross section manner, the diameter of the upper part is 6.6m, the diameter of the lower part is 20m, the height is 16.8m, and the wall thickness is 800mm. The cylindrical connecting section 3 is a cylindrical structure with a cavity, the diameter of the cylindrical connecting section is 20m, the height of the cylindrical connecting section is 1.2m, and the wall thickness of the cylindrical connecting section is 800mm. The arc-shaped connecting section 2 and the columnar connecting section 3 are formed by integrally casting concrete, and twenty-four first reserved holes 7 are uniformly distributed in the circumferential direction of the inner side wall of the connecting section.
The buoyancy tank 4 has a flat cylindrical structure with a cavity, the diameter of the buoyancy tank is 32m, the height of the buoyancy tank is 10m, and the wall thickness of the buoyancy tank is 15mm. The buoyancy tank 4 has a larger cross-sectional area, which increases the additional mass and potential flow damping of heave motions, providing good motion performance. The buoyancy tank 4 is internally provided with a first annular dividing plate 9 with the diameter of 20m and a second annular dividing plate 10 with the diameter of 18m, and the first annular dividing plate 9 and the second annular dividing plate 10 divide the buoyancy tank 4 into an inner ring, an outer ring and an intermediate section. Twenty four second reserved holes 8 are formed in the annulus between the first annular dividing plate 9 and the second annular dividing plate 10, and the bottoms of the second reserved holes 8 are fixedly connected with the bottom plate of the buoyancy tank 4. Twenty four second reserved holes 8 are in one-to-one correspondence with and are communicated with twenty four first reserved holes 7 for the mooring lines 5 to pass through. The second reserved pore canal 8 is smoothly connected with the first reserved pore canal 7 in a certain radian, so that the damage caused by stress concentration when the mooring line 5 is tensioned and stressed is avoided, and the normal operation of the system is influenced. The second reserved pore canal 8 and the first reserved pore canal 7 can prevent the mooring line 5 from contacting water, and the mooring anchor point is prevented from being damaged. The inside of the buoyancy tank 4 is also provided with four radial partition plates 11 which are uniformly distributed in the radial direction, the radial partition plates 11 divide the inner ring and the outer ring of the buoyancy tank 4 into four partition chambers respectively, each partition chamber is provided with a valve system capable of carrying out water-gas replacement, and the gravity center position of the buoyancy tank 4 can be adjusted by adding water in each partition chamber to ensure the towing stability of the foundation.
The mooring system comprises twenty-four mooring lines 5 and an anchor foundation 6.
Twenty-four mooring lines 5 comprise twelve straight mooring lines and twelve inclined mooring lines, which are staggered and evenly circumferentially arranged. The straight mooring line is vertically arranged between the floating box 4 and the anchoring foundation 6, the inclined mooring line is radially and obliquely arranged from the center to the outside from top to bottom between the floating box 4 and the anchoring foundation 6, and the included angle between the inclined mooring line and the vertical direction is within the range of 3-60 degrees. The lower ends of twenty-four mooring wires 5 are anchored on an anchoring foundation 6, and the upper ends of the twenty-four mooring wires 5 sequentially penetrate through a second reserved pore canal 8 of the buoyancy tank 4 and a first reserved pore canal 7 of the connecting section and are anchored at the top of the arc-shaped connecting section 2, so that an overwater tensioning system is formed, and the difficulty of underwater installation of the mooring wires is reduced. The straight mooring lines provide good heave and turning properties and the inclined mooring lines provide a large horizontal restraining force and the circumferential arrangement of the mooring lines 5 resists wave forces from all directions. The diameter of the mooring wires 5 is 167mm, and steel stranded wires, polyester fiber wires and the like can be adopted; the outside all adopts rubber sleeve to wrap up, avoids its corrosion damage in the sea water. The upper ends of the mooring lines 5 are provided with buoy balls before anchoring, so that the buoy balls can conveniently pass through the second reserved pore canal 8 and the first reserved pore canal 7; the anchored anchoring point is provided with a maintenance device.
The anchoring foundation 6 comprises a hollow square anchoring plate body, wherein the outer side length of the anchoring plate body is 32m, and the inner side length of the anchoring plate body is 14m; the inner and outer edges of the upper part of the anchoring plate body are provided with square cylinder walls with the height of 2m, and the inner and outer edges of the lower part are provided with square skirtboards with the height of 5 m. The anchoring plate body is used for providing an anchoring point at the lower end of the mooring line 5, the upper structure formed by the anchoring plate body and the cylinder wall can be filled with sand and ballasts, and the apron board penetrates into the seabed through the pressure load and the internal and external pressure difference. After the anchor foundation 6 penetrates the seabed by stacking and internal and external pressure differences, the pulling resistance provided by the pressing load and the skirt board is utilized to provide pulling resistance for positioning the mooring line 5.
Therefore, the mooring system can effectively control the floating platform to move in six degrees of freedom of heave, surge, sway, bow sway, roll and pitch, and ensure that the tension mooring submerged floating foundation has smaller motion response, thereby showing good dynamic performance and greatly reducing the design requirement on the wind turbine generator.
The construction method of the tension mooring submerged floating foundation comprises the following steps:
(1) Firstly, prefabricating a floating platform and a mooring system on land respectively, installing a fan tower on the floating platform stably, towing the fan tower and the floating platform to an operation sea area, and utilizing a buoyancy tank 4 of a large water plane to provide buoyancy so as to realize floating platform-tower-fan integral floating towing; simultaneously, the mooring system is towed and transported to an operation sea area, and a buoy ball is arranged at the upper end of a mooring line 5;
(2) After the floating platform provided with the fan tower and the mooring system are respectively towed and transported to an operation sea area, ballasting is applied to enable the anchoring foundation 6 in the mooring system to sink, and the anchoring foundation 6 is embedded into the sea bottom to be fixed through stacking and internal and external pressure difference;
(3) Sequentially penetrating the upper ends of twenty-four mooring lines 5 through the second reserved pore canal 8 and the first reserved pore canal 7 according to the buoy ball indication position, and pretensioning the mooring lines 5 in a certain proportion (10% -50%) to enable the mooring lines to be in a tensioning state so as to balance the buoyancy of the floating platform;
(4) Injecting water into the inner ring sub-cabins of the buoyancy tank 4 through a water-gas replacement valve system, so that the floating platform provided with the fan tower loses part of buoyancy and sinks, and air in the outer ring sub-cabins of the buoyancy tank 4 provides certain buoyancy for the foundation in the sinking process, thereby ensuring the stability of the offshore wind power floating foundation; when the floating platform is sunk to a designed draft position, the mooring line 5 reaches a preset length, and pretension of the residual proportion (50% -90%) of the mooring line 5 is completed so as to balance the buoyancy of the floating platform; anchoring the upper end of the mooring line 5 to the top of the arc-shaped connecting section 2;
(5) The water body in the sub-cabins of the floating box 4 is discharged through a valve system of water-gas displacement, so that the tension mooring submerged floating foundation is ensured to have certain floating stability;
(6) The mooring line 5 is brought into the water body of the second reserved duct 8 and the first reserved duct 7 to be discharged through high-pressure inflation, the bottom of the buoyancy tank 4 is sealed, and the second reserved duct 8 and the first reserved duct 7 are ensured to be in a dry state;
(7) After the floating box is in a position state, the center of gravity of the tension mooring submerged floating foundation is adjusted by injecting water into the outer-ring sub-cabins of the floating box 4, so that safe and stable operation of the tension mooring submerged floating foundation is ensured.
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, not restrictive, and many changes may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are to be construed as falling within the scope of the present invention.

Claims (7)

1. The construction method of the tension mooring submerged floating foundation is characterized in that the tension mooring submerged floating foundation consists of a floating platform and a mooring system;
the floating platform comprises a connecting section and a buoyancy tank which are both hollow structures, the upper end of the connecting section is connected with a fan tower through a flange ring, and the lower end of the connecting section is fixedly connected with the buoyancy tank; the connecting section consists of an arc-shaped connecting section at the upper part and a columnar connecting section at the lower part, wherein the arc-shaped connecting section is arranged from top to bottom in a variable cross section manner, and the wall surface of the side wall of the arc-shaped connecting section is of a concave arc shape; a plurality of first reserved holes are uniformly distributed in the circumferential direction inside the side wall of the connecting section; the floating box is internally provided with a first annular cabin dividing plate, a second annular cabin dividing plate and a plurality of radial cabin dividing plates, the first annular cabin dividing plate, the second annular cabin dividing plate and the plurality of radial cabin dividing plates divide the floating box into a plurality of cabin dividing chambers, and each cabin dividing chamber is provided with a valve system capable of replacing water and air; a plurality of second reserved pore passages are uniformly distributed between the first annular dividing plate and the second annular dividing plate in the circumferential direction, and the bottoms of the second reserved pore passages are fixedly connected with the bottom plate of the buoyancy tank; the number of the second reserved pore canals is the same as that of the first reserved pore canals, and the second reserved pore canals are correspondingly connected and communicated with the first reserved pore canals one by one;
the mooring system comprises mooring lines and an anchoring foundation, the number of the mooring lines is the same as that of the second reserved pore canals and the first reserved pore canals, the mooring lines consist of straight mooring lines and inclined mooring lines which are uniformly and annularly arranged in a staggered manner, the straight mooring lines are vertically arranged between the floating box and the anchoring foundation, and the inclined mooring lines are radially and obliquely arranged from the center to the outside from top to bottom between the floating box and the anchoring foundation; the lower ends of the mooring lines are anchored to the anchoring foundation, and the upper ends of the mooring lines sequentially pass through the second reserved pore canal and the first reserved pore canal and are anchored to the top of the connecting section; the anchoring foundation comprises a hollow anchoring plate body, wherein the inner and outer edges of the upper part of the anchoring plate body are provided with cylinder walls, and the inner and outer edges of the lower part of the anchoring plate body are provided with skirtboards;
the construction method comprises the following steps:
(1) Firstly prefabricating the floating platform and the mooring system on land, installing a fan tower on the floating platform stably, towing and transporting the floating platform with the fan tower installed to an operation sea area, towing and transporting the mooring system to the operation sea area, wherein buoy balls are arranged at the upper ends of mooring lines;
(2) Applying ballast to sink the anchoring foundation and embedding the anchoring foundation into the sea floor for fixation by stacking and internal and external pressure differences;
(3) Sequentially passing the upper end of the mooring line through the second reserved pore canal and the first reserved pore canal according to the buoy ball indication position, and pre-tensioning the mooring line by 10% -50% to enable the mooring line to be in a tensioning state so as to balance the buoyancy of the floating platform;
(4) Injecting water into the sub-cabins through a water-gas replacement valve system, so that the floating platform provided with the fan tower loses part of buoyancy and sinks, when sinking to a designed draft position, the mooring line is pre-tensioned by 50% -90% to balance the buoyancy of the floating platform, and the upper end of the mooring line is anchored at the top of the connecting section;
(5) Discharging the water body in the sub-cabins through a valve system for replacing water and air;
(6) The mooring line is brought into the water body in the second reserved pore canal and the first reserved pore canal to be discharged through high-pressure inflation, and the bottom of the buoyancy tank is sealed;
(7) And adjusting the gravity center position of the tension mooring submerged floating foundation through the sub-cabins.
2. The construction method of a tension mooring submerged floating foundation according to claim 1, wherein the arc-shaped connecting section and the columnar connecting section of the connecting section are integrally cast with concrete.
3. The method of claim 1, wherein the second pre-tunnel is smoothly joined to the first pre-tunnel in an arc.
4. The method of constructing a tension moored submerged foundation according to claim 1, wherein the number of mooring lines is 8-32, wherein the number of straight mooring lines and the number of inclined mooring lines each account for half.
5. The method of constructing a tension mooring submerged floating foundation of claim 1, wherein the inclined mooring line is at an angle of 3 ° to 60 ° to the vertical.
6. The method of constructing a tension mooring submerged foundation according to claim 1, wherein the mooring line upper ends are provided with buoy balls before anchoring, and each anchoring point after anchoring is provided with a maintenance device.
7. The method of constructing a tension mooring submerged foundation of claim 1, wherein the exposed portions of the mooring lines are each encased in rubber bushings.
CN201810065128.4A 2018-01-23 2018-01-23 Tensioning mooring submerged floating foundation and construction method thereof Active CN108316335B (en)

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CN102277878B (en) * 2011-05-12 2014-03-12 江苏道达海上风电工程科技有限公司 Floating foundation and construction method thereof
CN102704502A (en) * 2012-05-30 2012-10-03 天津大学 Offshore submerged box type foundation structure and construction method thereof
CN102677694B (en) * 2012-05-30 2015-05-13 天津大学 Offshore wind power submersible foundation structure and complete fan installation construction method thereof
CN104925231B (en) * 2015-06-29 2017-07-11 中国能源建设集团广东省电力设计研究院有限公司 Floating blower foundation and floating Wind turbines
CN105438411B (en) * 2015-11-16 2017-06-09 中国能源建设集团江苏省电力设计院有限公司 It is a kind of can towage offshore wind farm spar buoyant foundations
CN207987953U (en) * 2018-01-23 2018-10-19 天津大学 A kind of tension type mooring submersible buoyant foundation

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