CN114086592B - Assembled offshore wind power floating foundation structure and construction method thereof - Google Patents
Assembled offshore wind power floating foundation structure and construction method thereof Download PDFInfo
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- CN114086592B CN114086592B CN202111396432.5A CN202111396432A CN114086592B CN 114086592 B CN114086592 B CN 114086592B CN 202111396432 A CN202111396432 A CN 202111396432A CN 114086592 B CN114086592 B CN 114086592B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- 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
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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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
- E02D27/44—Foundations for machines, engines or ordnance
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- 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
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
Abstract
The invention provides an assembled offshore wind power floating foundation structure and a construction method thereof, wherein the assembled offshore wind power floating foundation structure comprises a plurality of prefabricated column split structures and box-type connecting beams, the column split structures are arranged in a regular triangle, the two column split structures are connected through the box-type connecting beams, a socket and a grouting cabin are reserved at the connection part of the column split structures and the box-type connecting beams, and limit tensile connecting structures are arranged at the connection parts of the two ends of the box-type connecting beams and the column split structures. The invention reduces the requirements of processing sites and transportation equipment; the special box-type connecting beam assembly structure can be directly assembled on the sea, and is beneficial to mass flow production of fan foundations.
Description
Technical Field
The invention relates to the technical field of offshore wind power development equipment, in particular to an assembled offshore wind power floating foundation structure and a construction method thereof.
Background
The wind energy is used as a renewable clean energy source in the key stage of energy transformation in China, the technology is mature, the cost is continuously reduced, and the wind energy plays a role in new energy development in China. Offshore wind power generation has unique advantages over onshore wind power generation. The offshore wind resources are rich and the wind speed and the wind direction are stable; the offshore wind farm does not occupy land resources; the single machine has large capacity and is suitable for large-scale development. Currently, the development of offshore stationary wind power has been basically industrialized, and some early-established offshore wind farms are walking into middle and later development stages. However, for the development of floating wind power with a water depth of more than 50 meters, both domestic and international research phases are still in progress. In the long term, with the saturation of wind power resource development in intertidal zones and offshore areas, the development of offshore wind power is a necessary trend from offshore to deep open sea, and the research and development and design of a floating offshore wind turbine generator structure are imperative.
The floating type offshore wind turbine structure is complex engineering equipment with multiple systems, and consists of multiple subsystems, and mainly comprises an upper fan, a middle tower, a lower floating foundation and a mooring system. The floating foundation is the dependence of stable power generation work of the whole wind turbine, and the design of the floating foundation is the weight of the whole device. In order to meet the operation requirements of the wind generating set in a deep open sea environment, the design body type of the floating foundation is usually quite large. The existing floating foundation design is generally processed in a workshop or a dock integrally and is transported to an offshore machine position, so that the requirements on processing sites and transportation ships are very high, and the mass production requirements of wind farm construction are not facilitated.
Disclosure of Invention
Aiming at the defects in the prior art, the first aim of the invention is to provide an assembled offshore wind power floating foundation structure and a construction method thereof. The invention reduces the requirements of processing sites and transportation equipment; the special box-type connecting beam assembly structure can be directly assembled on the sea, and is beneficial to mass flow production of fan foundations.
In order to solve the technical problems, the invention is realized by the following technical scheme:
an assembled offshore wind power floating foundation structure which is characterized in that: the connecting structure comprises a plurality of prefabricated column type split structures and box-shaped connecting beams, wherein the column type split structures are arranged in a regular triangle, the two column type split structures are connected through the box-shaped connecting beams, a socket and a grouting cabin are reserved at the joint of the column type split structures and the box-shaped connecting beams, and limiting tensile connecting structures are arranged at the joints of the two ends of the box-shaped connecting beams and the column type split structures.
Further: the column type split structure is divided into two sections of structures, the section of the upper section structure is smaller than that of the lower section structure, the upper section structure and the lower section structure are respectively connected with the box type connecting beam, the sockets are reserved at the joints of the upper section structure and the lower section structure and the box type connecting beam, grouting cabins are connected around the sockets, and the size of the sockets is matched with that of the box type connecting beam.
Further: the surfaces of the upper section structure and the lower section structure, which are positioned outside the foundation structure, are respectively cylindrical surfaces, and the upper section structure and the lower section structure are arranged in a plane on the connecting side connected with the box-shaped connecting beam.
Further: two adjacent planes on the upright column type split structure are provided with installation positioning surfaces for forming the box type connecting beam, a detachable installation positioning tool is arranged on the installation positioning surfaces, and the installation positioning tool plays a role in positioning and guiding in the installation process of the box type connecting beam; the installation positioning tool comprises two first connecting plates which are connected and are arranged at 120 degrees, the other ends of the two first connecting plates are respectively connected with a second connecting plate, and an included angle between the two second connecting plates is arranged at 60 degrees.
Further: the two ends of the box-type connecting beam are reserved with cross openings at the connection positions with the column type split structure, the grouting cabin of the lower section structure comprises first grouting grooves formed in the bulkheads at the two sides of the socket, the top and the bottom, reinforcing steel bars are arranged in the cross openings at the two ends of the box-type connecting beam, the end parts of the reinforcing steel bars are arranged in the first grouting grooves, and concrete is poured in the first grouting grooves; the grouting cabin of the upper section structure comprises second grouting grooves formed in the bulkheads around the faucet, and the end parts of the steel bars distributed in the cross openings at the two ends of the box-type connecting beam are arranged in the second grouting grooves, and concrete is poured into the second grouting grooves.
Further: the column type split structure is provided with a fixedly connected mooring system, and watertight ballast tanks can be arranged in the space outside the grouting cabin and the jack inside the column type split structure.
Further: and a grouting channel connected to the grouting cabin and the socket is reserved in the column type split structure.
Further: and shear keys are reserved at the connection parts of the two ends of the box-type connecting beam and the column-type split structure, and are arranged on the periphery of the outer wall of the box-type connecting beam perpendicular to the axis of the box-type connecting beam.
A second object of the present invention is to: the construction method for the assembled offshore wind power floating foundation structure comprises the following steps of prefabricating a column type split structure and a box type connecting beam in a dock, and carrying out split transportation to a bay, offshore or service machine by utilizing a barge to carry out assembly and grouting connection, wherein the construction method comprises the following steps:
s1, first assembling: firstly, carrying and stabilizing two column split structures by using a barge, correspondingly inserting a box-shaped connecting beam into a jack of an upper section structure of the two column split structures on the barge, penetrating reinforcing steel bars into a cross opening of the box-shaped connecting beam, reserving two ends of the reinforcing steel bars in a second grouting groove, and grouting a grouting cabin of the upper section structure through a grouting channel;
s2, correspondingly inserting another box-shaped connecting beam into the insertion opening of the lower section structure of the two column-type split structures, penetrating reinforcing steel bars into the cross openings of the box-shaped connecting beams, reserving two ends of the reinforcing steel bars in the first grouting grooves, and grouting a grouting cabin of the lower section structure through a grouting channel;
s3, second assembly: carrying and stabilizing the third column split structure by using another barge, ensuring that the three column split structures are in triangular arrangement, respectively inserting a box-shaped connecting beam into sockets of the upper section structures of the third column split structure and the other two column split structures correspondingly, penetrating reinforcing steel bars into cross openings of the box-shaped connecting beams, reserving two ends of the reinforcing steel bars in a second grouting groove, and grouting cabins of the upper section structures through grouting channels;
s4, inserting a box-shaped connecting beam into the sockets of the lower section structures of the third column-type split structure and the other two column-type split structures respectively, penetrating reinforcing steel bars into the cross openings of the box-shaped connecting beams, reserving two ends of the reinforcing steel bars in the first grouting grooves, and grouting cabins of the lower section structures through grouting channels;
s5, the whole structure is launched, wet towed and machine position is installed: after the grouting strength of the foundation structure reaches the designated strength, the whole foundation structure is launched into water and is floating to a fan machine position, and a mooring system is installed; wherein the anchoring of the mooring system is completed before the structure is hauled to the blower station.
Further: before the third column split structure is assembled, an installation positioning tool is arranged at the socket position of the third column split structure and the socket position of the other column split structure needing to be assembled with the box-type connecting beam, the position of the box-type connecting beam is selected according to the positioning and guiding functions of the installation positioning tool, and the box-type connecting beam is supported and positioned in the inserting process of the box-type connecting beam.
Compared with the prior art, the invention has the following advantages:
1. the assembly type design of the invention greatly reduces the requirements on steel structure processing factories, transportation and installation ships and wharfs, reduces the construction difficulty and threshold, and provides a reliable idea for mass production of wind farm construction.
2. The invention is based on the design concept of offshore assembly, has a semi-submersible structural foundation type, has wide application range of water depth, and can be simultaneously applied to shallow water and deep water sea areas.
3. The split column structure is assembled on the sea through the box-shaped connecting beams, and the special box-shaped connecting beams, split column assembling structure and construction technical means are beneficial to offshore assembling operation.
4. The design of the cross leaning opening and the internal ribs of the box-shaped connecting beam in the column-type split structure is beneficial to ensuring the uniform transmission of structural force after grouting connection and ensuring the strength of the connecting part.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a schematic structural view of the column-type split structure of the present invention;
FIG. 5 is a schematic view of the structure of the box-type connecting beam of the present invention;
FIG. 6 is an enlarged view of a portion of the junction of the column-type split structure and the box-type connecting beam of the present invention;
FIG. 7 is a first assembly of an offshore assembly work drawing of the present invention;
FIG. 8 is a second assembly of the marine assembly work diagram of the present invention;
fig. 9 is a schematic view of the structure of the installation positioning tool of the present invention.
Reference numerals: 1-a column type split structure; 2-box-type connecting beams; 3-installing a positioning tool; 4-sockets; 5-grouting cabins; 6-shear key; 7-a cross opening; 8-upper section structure; 9-lower section structure; 10-rectangular cross section; 11-a first grouting groove; 12-reinforcing steel bars; 13-a second grouting groove; 14-a first connection plate; 15-a second connecting plate.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, preferred embodiments of the present invention will be described below with reference to specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present invention; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship described in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
As shown in fig. 1 to 9, an assembled offshore wind power floating foundation structure and a construction method thereof includes a plurality of prefabricated column-type split structures 1 and box-type connection beams 2. The total height of the column type split structure 1 is 30 m, the diameter of the upper section structure 8 is 13 m, and the diameter of the lower section structure 9 is 25 m. The box-type connecting beam 2 has a length of 35 m and a cross section of a 9 x 6 m box type. The plurality of column type split structures 1 are arranged in a regular triangle, two column type split structures 1 are connected through a box type connecting beam 2, a jack 4 and a grouting cabin 5 are reserved at the joint of the column type split structures 1 and the box type connecting beam 2, and two ends of the box type connecting beam 2 are provided with limiting tensile connecting structures at the joint of the box type split structures 1.
The column type split structure 1 is divided into two sections, the section of the upper section structure 8 is smaller than the section of the lower section structure 9, the upper section structure 8 and the lower section structure 9 are respectively connected with the box type connecting beam 2, the connection parts of the upper section structure 8 and the lower section structure 9 and the box type connecting beam 2 are reserved with the jack 4, the grouting cabin 5 is connected around the jack 4, and the size of the jack 4 is matched with that of the box type connecting beam 2.
The surfaces of the upper section structure 8 and the lower section structure 9, which are positioned outside the foundation structure, are respectively cylindrical surfaces so as to ensure that the wave loads of the column type split structure 1 in all directions are uniform, the connection sides of the upper section structure 8 and the lower section structure 9, which are connected with the box-type connecting beams 2, are rectangular sections 10 which are arranged on planes so as to facilitate the assembly of the box-type connecting beams 2 on the sea, and the elevation of a design waterline of the assembled offshore wind power floating foundation structure and the height Cheng Yizhi of the upper section structure 8 are ensured.
Two adjacent rectangular sections 10 on the column type split structure 1 form a mounting and positioning surface of the box type connecting beam 2, a detachable mounting and positioning tool 3 is arranged on the mounting and positioning surface, and the mounting and positioning tool plays a guiding role in the mounting process of the box type connecting beam 2. The installation positioning tool 3 comprises two first connecting plates 14 which are connected and are arranged at 120 degrees, the side surfaces of the two first connecting plates 14 are respectively connected with two adjacent rectangular sections 10, the other ends of the two first connecting plates 14 are respectively connected with a second connecting plate 15, and an included angle between the two second connecting plates 15 is 60 degrees.
When the box-type connecting beam 2 is installed, the barge at sea can shake inevitably, which causes certain difficulty to the positioning and the installation of the box-type connecting beam 2; at this time, the installation positioning tool 3 is installed on the rectangular section 10 of the column type split structure 1 of the two column type split structures 1, the box type connecting beam 2 needs to be assembled, the side wall of the box type connecting beam 2 is attached to the second connecting plates 15 of the two installation positioning tools 3, the box type connecting beam 2 moves along the second connecting plates 15 towards the insertion opening 4 of the column type split structure 1, and can be easily inserted into the insertion opening 4 of the column type split structure 1, and then the other column type split structure 1 moves towards the direction of the box type connecting beam 2 through the attaching surface of the second connecting plates 15 and the box type connecting beam 2, so that the box type connecting beam 2 is inserted into the insertion opening 4; meanwhile, in the process of connecting and pouring concrete, the installation and positioning tool 3 also plays a role in supporting and positioning the box-type connecting beam 2.
The limiting tensile connecting structure is implemented in the following manner: the two ends of the box-type connecting beam 2 are reserved with cross openings 7 at the joint of the box-type connecting beam and the upright column type split structure 1, the grouting cabin 5 of the lower section structure 9 comprises first grouting grooves 11 formed in the bulkheads at the two sides, the top and the bottom of the faucet 4, reinforcing steel bars 12 are arranged in the cross openings 7 at the two ends of the box-type connecting beam 2, the end parts of the reinforcing steel bars 12 are arranged in the first grouting grooves 11, and concrete is poured in the first grouting grooves 11.
The grouting cabin 5 of the upper section structure 8 comprises a second grouting groove 13 formed in the bulkhead around the socket 4, and the end parts of the steel bars 12 arranged in the cross openings 7 at the two ends of the box-type connecting beam 2 are arranged in the second grouting groove 13, and concrete is poured into the second grouting groove 13. The first grouting groove 11 and the second grouting groove 13 are arranged, so that firm supporting force in all directions can be provided for the box-type connecting beam 2 after grouting. The reinforcement bars 12 are arranged to provide the concrete with a stronger tensile strength.
Temporary fixing equipment such as anchor rods, jacks or welding plates can be added into the cross opening 7 in the offshore assembly construction process so as to prevent relative displacement during assembly. One of the upright column type split structures 1 is used as a fan installation platform, a tower connecting flange is arranged at the top, and a fan tower and a wind driven generator are installed above the tower connecting flange; the top surface of the fan mounting platform is fixedly connected with the bottom end of a fan tower cylinder, and the top end of the fan tower cylinder is fixedly connected with a wind driven generator; the wind driven generator mainly comprises a cabin, a hub and blades.
The dimensions of the socket 4 and the grouting chamber 5 are matched with those of the box-type connecting beam 2.
The vertical column type split structure 1 is provided with a fixedly connected mooring system, the foundation structure is moored on the seabed through the mooring system, watertight ballast tanks can be arranged in the space outside the grouting cabin 5 and the jack 4 inside the vertical column type split structure 1, fixed ballasts or movable ballasts can be filled, the filling materials can be high-density ores, seawater and concrete, and then the draft state and the underwater posture of the structure are adjusted.
The mooring system mainly comprises a cable guiding hole, an anchor machine and an anchor chain, wherein the anchor machine is arranged in the column type split structure 1, the anchor machine is provided with the cable guiding hole, and the anchor chain is connected with the anchor machine through the cable guiding hole. The mooring system adopts catenary mooring or tensioning mooring, anchor machines are arranged in the three column type split structures 1, and an included angle between two adjacent mooring points is 120 degrees; two anchor chains are connected to each anchor machine, and the included angle of the two anchor chains is 60 degrees.
The grouting cabin 5 is provided with a watertight cabin door, constructors can enter the grouting cabin 5 to perform temporary reinforcement and reinforcement distribution work before grouting through the watertight cabin door, and after reinforcement distribution is completed, the constructors withdraw from the cabin; after grouting, the watertight hatch is no longer activated. A grouting channel connected to the grouting cabin 5 and the socket 4 is reserved in the column type split structure 1. The grouting equipment may use this grouting channel to grout the grouting cabin 5 and the spigot 4. During grouting, the slurry flows into the cross opening 7 of the box-type connecting beam 2 from the closed cabin or the jack 4 of the column-type split structure 1 through the grouting channel, and fills the whole grouting space grouting cabin 5 and the jack 4.
The two ends of the box-type connecting beam 2 are reserved with shear keys 6 at the joint with the column-type split structure 1, and the shear keys 6 are arranged on the periphery of the outer wall of the box-type connecting beam 2 and perpendicular to the axis of the box-type connecting beam 2.
The invention also provides a construction method of the assembled offshore wind power floating foundation structure, which comprises the steps of prefabricating a column type split structure 1 and a box type connecting beam 2 in a dock, and carrying out split transportation to a bay, offshore or service machine by utilizing a barge to carry out split joint and grouting connection, wherein the construction method comprises the following steps of:
s1, first assembling: firstly, carrying and stabilizing two upright column type split structures 1 by using a barge, correspondingly inserting a box-shaped connecting beam 2 into a jack 4 of an upper section structure 8 of the two upright column type split structures 1 on the barge, penetrating reinforcing steel bars 12 into a cross opening 7 of the box-shaped connecting beam 2, reserving two ends of the reinforcing steel bars 12 in a second grouting groove 13, and grouting a grouting cabin 5 of the upper section structure 8 through a grouting channel;
s2, correspondingly inserting another box-type connecting beam 2 into the insertion opening 4 of the lower section structure 9 of the two column-type split structures 1, penetrating reinforcing steel bars 12 into the cross openings 7 of the box-type connecting beam 2, reserving two ends of the reinforcing steel bars 12 in the first grouting grooves 11, and grouting the grouting cabin 5 of the lower section structure 9 through grouting channels;
s3, second assembly: carrying and stabilizing the third column type split structure 1 by using another barge, ensuring that the three column type split structures 1 are in triangular arrangement, respectively inserting a box type connecting beam 2 into sockets 4 of upper section structures 8 of the third column type split structure 1 and the other two column type split structures 1, penetrating reinforcing steel bars 12 into cross openings 7 of the box type connecting beams 2, reserving two ends of the reinforcing steel bars 12 in second grouting grooves 13, and grouting cabins 5 of the upper section structures 8 through grouting channels;
s4, correspondingly inserting a box-shaped connecting beam 2 into the sockets 4 of the third column-type split structure 1 and the lower section structures 9 of the other two column-type split structures 1, penetrating reinforcing steel bars 12 into the cross openings 7 of the box-shaped connecting beam 2, reserving two ends of the reinforcing steel bars 12 in the first grouting grooves 11, and grouting the grouting cabins 5 of the lower section structures 9 through grouting channels;
s5, the whole structure is launched, wet towed and machine position is installed: after the grouting strength of the foundation structure reaches the designated strength, the whole foundation structure is launched into water and is floating to a fan machine position, and a mooring system is installed; wherein the anchoring of the mooring system is completed before the structure is hauled to the blower station.
Before the third column type split structure 1 is assembled, an installation positioning tool 3 is arranged at the position of a socket 4 of the third column type split structure 1 and the other column type split structure 1 needing to be assembled with the box type connecting beam 2, the position of the box type connecting beam 2 is selected according to the positioning and guiding functions of the installation positioning tool 3, and the box type connecting beam 2 is supported and positioned in the inserting process.
After the first assembly is completed and before the second assembly, the third column type split structure 1 is used as a fan installation platform to install a tower, a fan and an impeller.
In step S5, a part of ballast is preloaded in the foundation structure during wet towing, the towing center of gravity of the structure is adjusted, towing is facilitated, and after the installation position is reached, ballast water is secondarily loaded and adjusted to design draft. The anchor and the anchor chain of the mooring system are pre-installed in the working sea area, and after the foundation structure is towed to the site, the free end of the anchor chain is connected with the anchor machine in the column type split structure 1, so that mooring is completed.
Based on the description of the invention and the drawings, a person skilled in the art can easily manufacture or use the assembled offshore wind power floating foundation structure and the construction method thereof, and can produce the positive effects described in the invention.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present invention fall within the scope of the present invention.
Claims (6)
1. An assembled offshore wind power floating foundation structure which is characterized in that: the grouting device comprises a plurality of prefabricated column split structures (1) and box-shaped connecting beams (2), wherein the column split structures (1) are arranged in a regular triangle, the two column split structures (1) are connected through the box-shaped connecting beams (2), a jack (4) and a grouting cabin (5) are reserved at the joint of the column split structures (1) and the box-shaped connecting beams (2), and limiting tensile connecting structures are arranged at the joint of the two ends of the box-shaped connecting beams (2) and the column split structures (1);
the column type split structure (1) is divided into two sections, the section of an upper section structure (8) is smaller than that of a lower section structure (9), the upper section structure (8) and the lower section structure (9) are respectively connected with the box-shaped connecting beam (2), the connection parts of the upper section structure (8) and the lower section structure (9) and the box-shaped connecting beam (2) are reserved with the sockets (4), the grouting cabin (5) is connected around the sockets (4), and the size of the sockets (4) is matched with that of the box-shaped connecting beam (2);
the surfaces of the upper section structure (8) and the lower section structure (9) which are positioned outside the foundation structure are respectively arranged in a cylindrical surface, and the upper section structure (8) and the lower section structure (9) are rectangular sections (10) which are arranged in a plane at the connecting side connected with the box-shaped connecting beam (2);
rectangular sections (10) arranged on two adjacent planes on the column type split structure (1) form an installation positioning surface of the box type connecting beam (2), a detachable installation positioning tool (3) is arranged on the installation positioning surface, and the installation positioning tool (3) plays a role in positioning and guiding in the installation process of the box type connecting beam (2); the installation positioning tool (3) comprises two first connecting plates (14) which are connected and are arranged at 120 degrees, the other ends of the two first connecting plates (14) are respectively connected with a second connecting plate (15), and an included angle between the two second connecting plates (15) is 60 degrees;
the two ends of the box-type connecting beam (2) are reserved with cross openings (7) at the connection positions with the column-type split structure (1), the grouting cabin (5) of the lower section structure (9) comprises first grouting grooves (11) formed in bulkheads at two sides, the top and the bottom of the faucet (4), reinforcing steel bars (12) are arranged in the cross openings (7) at the two ends of the box-type connecting beam (2), the end parts of the reinforcing steel bars (12) are arranged in the first grouting grooves (11), and concrete is poured in the first grouting grooves (11); the grouting cabin (5) of the upper section structure (8) comprises second grouting grooves (13) formed in the bulkhead around the insertion opening (4), the end parts of the reinforcing steel bars (12) distributed in the cross openings (7) at the two ends of the box-shaped connecting beam (2) are arranged in the second grouting grooves (13), and concrete is poured into the second grouting grooves (13).
2. A fabricated offshore wind power floating foundation structure as claimed in claim 1, wherein: the column type split structure (1) is provided with a fixedly connected mooring system, and watertight ballast tanks can be arranged in the space outside the grouting cabin (5) and the jack (4) inside the column type split structure (1).
3. A fabricated offshore wind power floating foundation structure as claimed in claim 1, wherein: grouting channels connected to the grouting cabin (5) and the socket (4) are reserved in the column type split structure (1).
4. A fabricated offshore wind power floating foundation structure as claimed in claim 1, wherein: the two ends of the box-shaped connecting beam (2) are reserved with shear keys (6) at the connection part with the column-type split structure (1), and the shear keys (6) are arranged on the periphery of the outer wall of the box-shaped connecting beam (2) and perpendicular to the axis of the box-shaped connecting beam (2).
5. A construction method of an assembled offshore wind power floating foundation structure, characterized in that a column type split structure (1) and a box type connecting beam (2) as claimed in claim 1 are prefabricated in a dock, and transported to a bay, offshore or service machine by split barge for assembly and grouting connection, the construction method comprises the following steps:
s1, first assembling: firstly, carrying and stabilizing two column split structures (1) by using a barge, correspondingly inserting a box-shaped connecting beam (2) into a jack (4) of an upper section structure (8) of the two column split structures (1) on the barge, penetrating reinforcing steel bars (12) into a cross opening (7) of the box-shaped connecting beam (2), reserving two ends of the reinforcing steel bars (12) in a second grouting groove (13), and grouting a grouting cabin (5) of the upper section structure (8) through a grouting channel;
s2, correspondingly inserting another box-type connecting beam (2) into the insertion opening (4) of the lower section structure (9) of the two column-type split structure (1), penetrating reinforcing steel bars (12) into the cross openings (7) of the box-type connecting beam (2), reserving two ends of the reinforcing steel bars (12) in the first grouting grooves (11), and grouting a grouting cabin (5) of the lower section structure (9) through grouting channels;
s3, second assembly: carrying and stabilizing the third column split structure (1) by using another barge, ensuring that the three column split structures (1) are arranged in a triangle, correspondingly inserting a box-shaped connecting beam (2) into a socket (4) of the upper section structure (8) of the third column split structure (1) and the other two column split structures (1), penetrating a reinforcing steel bar (12) into a cross opening (7) of the box-shaped connecting beam (2), reserving two ends of the reinforcing steel bar (12) in a second grouting groove (13), and grouting a grouting cabin (5) of the upper section structure (8) through a grouting channel;
s4, correspondingly inserting a box-shaped connecting beam (2) into the sockets (4) of the third column-type split structure (1) and the lower section structures (9) of the other two column-type split structures (1), penetrating reinforcing steel bars (12) into the cross openings (7) of the box-shaped connecting beam (2), reserving two ends of the reinforcing steel bars (12) in the first grouting grooves (11), and grouting cabins (5) of the lower section structures (9) through grouting channels;
s5, the whole structure is launched, wet towed and machine position is installed: after the grouting strength of the foundation structure reaches the designated strength, the whole foundation structure is launched into water and is floating to a fan machine position, and a mooring system is installed; wherein the anchoring of the mooring system is completed before the structure is hauled to the blower station.
6. The construction method of the assembled offshore wind power floating foundation structure according to claim 5, wherein the construction method comprises the following steps: before the third column type split structure (1) is assembled, an installation positioning tool (3) is arranged at the position of a socket (4) of the third column type split structure (1) and another column type split structure (1) needing to be assembled with the box type connecting beam (2), the position of the box type connecting beam (2) is selected according to the positioning and guiding functions of the installation positioning tool (3), and the box type connecting beam (2) is supported and positioned in the inserting process of the box type connecting beam (2).
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| CN114855865B (en) * | 2022-05-20 | 2024-03-29 | 中国电建集团华东勘测设计研究院有限公司 | Tensioning type fan foundation anchored on rock-based seabed and arrangement method |
| CN114670978B (en) * | 2022-05-31 | 2022-08-16 | 中国海洋大学 | Multi-module assembled offshore power generation device |
| CN116620514B (en) * | 2023-03-30 | 2023-10-24 | 大连理工大学 | Method for batch assembly and transportation of floating type offshore wind power equipment supporting structure |
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| CN105569928A (en) * | 2015-12-23 | 2016-05-11 | 天津大学 | Single point mooring type deep sea floating type draught fan |
| CN107021190A (en) * | 2017-03-30 | 2017-08-08 | 中国海洋石油总公司 | Can be from the floating tension leg type offshore floating wind turbine foundation installed and its installation method |
| CN107738730A (en) * | 2017-09-06 | 2018-02-27 | 哈尔滨工业大学深圳研究生院 | A kind of three column semi-submersible type offshore wind turbine foundations |
| CN111232140B (en) * | 2020-01-06 | 2023-11-14 | 华北电力大学 | Floating offshore wind power foundation structure with additional net cage |
| CN111469992B (en) * | 2020-03-17 | 2022-04-15 | 中国电建集团华东勘测设计研究院有限公司 | Floating offshore wind power structure foundation with damping effect and stability control method |
| CN111301622A (en) * | 2020-03-25 | 2020-06-19 | 天津大学 | Migratory offshore wind power floating foundation and operation method thereof |
| CN111942533A (en) * | 2020-05-26 | 2020-11-17 | 大连船舶重工集团有限公司 | Three-upright-column offshore wind power generation platform system |
| CN113339200B (en) * | 2021-07-07 | 2023-06-20 | 大连理工大学 | Ultra-large semi-submersible floating wind turbine foundation based on tuned mass damper |
| CN113428307B (en) * | 2021-07-14 | 2023-05-09 | 中国海洋石油集团有限公司 | Semi-submerged floating fan foundation and semi-submerged floating fan |
| CN216892499U (en) * | 2021-11-23 | 2022-07-05 | 中国电建集团华东勘测设计研究院有限公司 | Assembled offshore wind power floating foundation structure |
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