A method for constructing a sea ranching net cage of an offshore wind power jacket foundation

Abstract

The present application belongs to the field of offshore wind power engineering, and particularly relates to a method for constructing a marine ranching net cage on a jacket foundation of offshore wind power, comprising: hoisting a net cage modularized installation part to the side of the jacket foundation; installing a diagonal brace hoop on the diagonal brace and a pile leg hoop on the pile leg; and installing a net cover assembly on the net cage modularized installation part. The present application develops a modularized installation part according to the specific structural form of the jacket foundation, modularizes the net cover fixing part, and modularly installs the net cover fixing part, so that the net cover fixing part is simply and efficiently installed on the completed jacket foundation.

Description

Technical Field

[0001] This invention belongs to the field of offshore wind power engineering, specifically relating to a method for constructing marine ranch cages for offshore wind power jacket foundations. Background Technology

[0002] The integrated development of offshore wind power and marine ranching is a current hot topic in marine economic development. One implementation of this model involves adding large marine ranching cages to various types of offshore wind power foundations. Offshore wind turbine jacket foundations have large internal spaces, accommodating aquaculture volumes of nearly 10,000 cubic meters, and tens of thousands of cubic meters in deep water, providing excellent conditions for cage aquaculture. However, the specific installation of these cages remains a challenging issue, as existing technologies generally suffer from overly cumbersome and inefficient installation processes. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a technical solution for the construction of marine ranch cages for offshore wind power jacket foundations.

[0004] A method for constructing marine ranching cages for offshore wind turbine jacket foundations, wherein the offshore wind turbine jacket foundation includes a pile platform, several pile legs disposed at the lower end of the pile platform, and marine ranching cages. Several sets of diagonal braces are disposed between adjacent pile legs, each set of diagonal braces including two X-shaped diagonal braces. Several triangular spaces are formed between the pile legs and the diagonal braces. The marine ranching cage includes several modular mounting components that are fitted onto the triangular spaces and a netting assembly that surrounds the outer perimeter and bottom of the jacket foundation through the modular mounting components. The modular mounting components include three strip frames connected end to end to form a triangular structure. Several pile leg clamps are spaced apart along the length of one strip frame for the pile legs. Several diagonal brace clamps are spaced apart along the length of the other two strip frames for the diagonal braces to hold the diagonal braces. Eye plates are provided on both the pile leg clamps and the diagonal brace clamps. The eye plates and the strip frames are used to install the netting assembly.

[0005] The construction method includes:

[0006] The modular installation components of the cage were hoisted to the side of the jacket foundation;

[0007] Install the diagonal brace clamp onto the diagonal brace, and install the pile leg clamp onto the pile leg;

[0008] Install the mesh assembly onto the modular mounting bracket of the mesh cage.

[0009] Furthermore, the mesh assembly is installed in multiple mesh pieces.

[0010] Furthermore, before hoisting the modular installation components of the gabion, floats are fixed on the modular installation components of the gabion.

[0011] Furthermore, the pile leg clamp is a semi-ring structure, which is used to connect with and clamp the pile leg to the corresponding pile leg clamp on another modular installation component of the cage via fasteners.

[0012] Furthermore, the diagonal brace clamp is a semi-ring structure, with its two ends connected by ropes to hold the diagonal brace tightly.

[0013] Furthermore, a ring beam is slidably fitted onto the pile leg clamp and / or diagonal brace clamp, the ring beam is fixedly connected to the corresponding strip frame, and the eye plate is set on the ring beam.

[0014] Furthermore, the eye plate is connected to the corresponding clamp via a spacer.

[0015] Furthermore, the strip frame includes several connecting strips, which are staggered with corresponding clamps, and adjacent clamps are connected by the connecting strips.

[0016] Furthermore, the strip frames are welded together for fixation.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1) This invention combines offshore wind power jacket foundation with marine ranching cages, realizing the integrated development of offshore wind power and marine ranching structures. It can leverage the advantages of each, achieve the sharing of resources such as electricity and operation and maintenance, and create additional economic value.

[0019] 2) This invention develops modular installation components for the unique structural form of jacket foundations, modularizing the net cage fixing components for modular installation. This simple and efficient method enables the later addition of net cage fixing components to the existing jacket foundation; it also eliminates the need for underwater welding to fix the net cage, making it suitable for the harsh and short-window sea conditions of offshore wind farms and significantly reducing construction costs.

[0020] 3) The cage structure proposed in this invention for the guide frame foundation has an extendable function, which can further expand the water volume of cage aquaculture while meeting the strength requirements;

[0021] 4) The modular installation components in this invention have a small contact area with the pile legs and diagonal braces, and occupy a small area of ​​the outer surface of the structure. This can fully avoid interference with auxiliary structures such as foundation support components, cables, and sacrificial anodes that are pre-welded to the foundation, and has good feasibility.

[0022] 5) This invention makes full use of the existing structure of the jacket foundation for the installation and fixation of the cage. The cage has good strength performance, and the arrangement of the diamond-shaped netting and netting has good adaptability to the jacket foundation.

[0023] 6) When constructing and hoisting the cages of this invention, the crane can operate outside the foundation without the need to carry out hoisting operations inside the jacket foundation, making the construction process simple. Attached Figure Description

[0024] Figure 1 This is one of the schematic diagrams of an offshore wind turbine jacket foundation structure according to the present invention;

[0025] Figure 2 This is a second schematic diagram of a offshore wind turbine jacket foundation structure according to the present invention;

[0026] Figure 3 This is a schematic diagram of a modular installation component structure in an offshore wind turbine jacket foundation according to the present invention;

[0027] Figure 4 This is one of the structural schematic diagrams of the connection between the modular installation component and the pile leg and diagonal brace in the offshore wind turbine jacket foundation according to the present invention;

[0028] Figure 5 This is a second schematic diagram of the connection between a modular installation component and the pile leg and diagonal brace in a offshore wind turbine jacket foundation according to the present invention.

[0029] Figure 6 This is a schematic diagram of the connection structure between the strip frame and the diagonal bracing clamp in a offshore wind power jacket foundation according to the present invention;

[0030] Figure 7 This is a schematic diagram of the connection structure between the strip frame and the diagonal bracing clamp in another embodiment of the offshore wind power jacket foundation of the present invention;

[0031] Figure 8 This is a flowchart illustrating a construction method for a marine ranching cage according to the present invention. Detailed Implementation

[0032] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] Please refer to 1-7, a type of offshore wind turbine jacket foundation, including a pile platform, several pile legs 3 set at the lower end of the pile platform, and marine ranching cages. Several sets of diagonal braces 4 are set between two adjacent pile legs 3. Each set of diagonal braces 4 includes two X-shaped diagonal braces 4. Several triangular spaces are formed between the pile legs 3 and the diagonal braces 4. The overall structure of the marine ranching cage is as follows. Figure 1 As shown, the cage aquaculture is achieved by fixing a net 2 around the perimeter and bottom of the guide frame foundation 1 to enclose the water space inside the guide frame foundation 1. It includes several modular mounting parts 5 that are installed in a triangular space and a net assembly that is arranged around the perimeter and bottom of the guide frame foundation 1 through the modular mounting parts 5. The modular mounting parts 5 include three strip frames 53, which are connected end to end to form a triangular structure. One strip frame 53 corresponds to the pile leg 3 and is provided with several pile leg clamps 51 at intervals along its own length. The pile leg clamps 51 are used to hold the pile leg 3 of the guide frame foundation. The other two strip frames 53 correspond to the diagonal brace 4 and are provided with several diagonal brace clamps 52 at intervals along their own length. The diagonal brace clamps 52 are used to hold the diagonal brace 4 of the guide frame foundation. The pile leg clamps 51 and the diagonal brace clamps 52 are provided with eye plates 56. The eye plates 56 and the strip frames 53 are used to install the net assembly. Among them, the pile leg clamp 51 and the diagonal brace clamp 52 are collectively referred to as clamps.

[0035] It is understood that in the above technical solution, the present invention adopts a modular installation method. For the triangular space formed between the pile leg 3 and the diagonal brace 4 of each jacket foundation 1, a strip frame 53, pile leg clamp 51, diagonal brace clamp 52, eye plate 56 and other structures are set up. This simple and efficient method realizes the installation of the jacket foundation cage structure, which is of great benefit to the three-dimensional development of marine resources.

[0036] Continue reading Figure 6 The strip frame 53 is composed of several connecting strips, which are staggered with corresponding clamps, and adjacent clamps are connected by connecting strips. In other words, the strip frame 53 is a split structure, which includes several separate connecting strips.

[0037] Continue reading Figure 3-5 The pile leg clamp 51 is a semi-ring structure, which needs to be used in conjunction with the corresponding pile leg clamp 51 on another modular installation component of the cage. When in use, the two clamps 51 are connected by fasteners and clamp the pile leg 3.

[0038] Continue reading Figure 6 The diagonal brace clamp 52 is also a semi-ring structure, with its two ends connected by ropes 55 to hold the diagonal brace 4 tightly.

[0039] Further reading Figure 6 A ring beam 54 is circumferentially slidably fitted onto the upper edge of the diagonal brace clamp 52. The ring beam 54 is welded to the corresponding connecting strip, and the eye plate 56 is directly welded onto the ring beam 54.

[0040] It should be noted that the structure of the ring beam 54 can be omitted from the diagonal bracing clamp 52, and the eye plate 56 can be directly welded to the diagonal bracing clamp 52; similarly, the pile leg clamp 51 can be equipped with a ring beam 54 or not.

[0041] In addition, adjacent strip frames 53 are fixed together by end welding.

[0042] During installation, the modular mounting component 5 is installed as a whole onto the pile leg 3, and the mesh 2 can be fixed by means of eye plates 56, etc. For ease of installation, the pile leg clamp 51 and the diagonal brace clamp 52 in this modular mounting component 5 differ. The pile leg clamp 52 on a single modular mounting component 5 consists of only half a clamp, which is semi-circular. This half clamp is connected to the pile leg clamp 52 of the same modular mounting component 5 on the other side of the jacket foundation 1 and secured with fasteners, such as... Figure 5 As shown, the two modular mounting pieces 5 are used to fix it to the pile leg 3. The semi-circular clamp on the diagonal brace clamp 52 will be used to fix the rope 55. One end of the rope 55 is fixed to the clamp ear plate in advance. During installation, the other end passes around the diagonal brace 4 and is fixed to another clamp ear plate of the clamp, thus securing it. The rope 55 is generally made of steel rope and needs to have characteristics such as small deformation and wear resistance. The diameter and number of ropes 55 can be adjusted according to the structural strength requirements. Small deformation allows the steel rope to tighten the clamp. Wear resistance is to ensure that the rope 55 is not easily damaged when it sways slightly under the long-term action of hydrodynamics and rubs against shellfish and other attachments on the pile leg 3.

[0043] Additionally, a rotating function can be designed on some of the diagonal bracing clamps 52 to facilitate initial fixing during clamp installation. The specific implementation method is as follows: Figure 6 As shown, a slightly larger ring beam 54 is pre-fitted onto the hoop plate of the diagonal brace 52. The ring beam 54 is welded and fixed to the connecting strip, so that the diagonal brace 52 can rotate around the diagonal brace 4.

[0044] like Figure 7 As shown, in another embodiment of the present invention, the eye plate 56 is connected to the ring beam 54 by a spacer 57.

[0045] Please see Figure 8 A construction method for marine ranching cages as described above includes:

[0046] S1 hoist the modular installation component 5 of the cage onto the side of the guide frame foundation 1;

[0047] S2 Install the diagonal brace clamp 52 onto the diagonal brace 4, and install the pile leg clamp 51 onto the pile leg 3;

[0048] S3 installs the mesh assembly onto the modular mounting component 5 of the mesh cage.

[0049] Specifically, during hoisting operations, floats can be pre-fixed on the upper part of the entire modular installation component 5, and sinkers can be selected at the lower part according to the actual situation. The attitude of the modular installation component 5 of the net cage can be adjusted by the buoyancy of the floats and the gravity of the sinkers, which facilitates underwater implementation.

[0050] During hoisting, first, the pile leg clamp 51 is brought close to the pile leg 3 from the side. After it is close, the entire modular installation component 5 is rotated along the pile leg 3 so that the clamp 52 of the diagonal brace is close to the diagonal brace. Since the side of the jacket foundation 1 itself has a certain angle, generally 1:5 or 1:6, at this time, under the action of gravity, the entire modular installation component 5 is held by the diagonal brace 4 side through the diagonal brace clamp 52. In this way, it can be held close to the entire side of the jacket foundation 1. In order to enhance the stability of the modular installation component 5 during installation, the diagonal brace clamp 52 is designed to be rotatable, that is, the structure of the ring beam 54 is designed. After the modular installation component 5 is hoisted close to the jacket foundation 1, part of the diagonal brace clamp 52 with the ring beam 54 is rotated from the side of the diagonal brace 4 to the upper surface of the diagonal brace 4. Under the action of gravity, the diagonal brace 4 can be held. The entire modular installation component 5 is secured at both diagonal braces 4, achieving initial stability and facilitating further fixing work. The steel cables 55 of the diagonal brace clamps 52 are tightened to fix the entire modular installation component 5 to the diagonal braces 4. This allows for the hoisting of another modular installation component 5 fixed to the pile leg 3 on the side of the jacket foundation 1, which is similarly initially secured. Finally, the two pile leg clamps 51 at the pile leg 4 are completely secured with bolts, completing the installation. Similarly, the installation of modular installation components 5 for other parts of the jacket foundation can be completed.

[0051] After the modular installation component 5 is installed, the installation of the mesh assembly is carried out. The mesh assembly adopts a segmented method, consisting of multiple mesh panels 2. The mesh panels 2 are fixed with wire mesh, which bears the hydrodynamic force of the mesh. The wire mesh is arranged in a diamond pattern along the diagonal brace 4, reducing the maximum length of a single wire mesh and resulting in more even stress distribution on the mesh panels 2. This is suitable for the diagonal bracing structure of the jacket foundation 1. Figure 2 As shown, the mesh is fixed to the eye plate 56 welded to the side of the clamp, and the edge of the mesh 2 is fixed to the strip frame 53, thus achieving the closure of the mesh 2.

[0052] It is worth noting that the side of the jacket foundation 1 is formed by a diamond-shaped space created by four diagonal braces 4. A single diamond-shaped mesh 2 is installed here, and the eye plate 56 of the diagonal brace clamp 52 on the diagonal brace 4 can also be installed. That is, the eye plate 56 at a single diagonal brace clamp 52 will be shared by the netting of the upper and lower mesh 2. As for the bottom mesh 2, the actual height of the top of the pile leg 3 from the seabed surface can be considered. Under the condition that the height of the bottom mesh 2 is about 5 m from the seabed surface, the bottom pile leg clamp 51 can be appropriately extended. Similarly, the side mesh 2 is fixed to the pile leg clamp 51 and the eye plate 56 of the diagonal brace clamp 52. Finally, the bottom mesh 2 is connected to the bottom of the four side mesh 2. The bottom mesh 2 is also equipped with netting. Since the wave force at the bottom of the jacket foundation 1 is very small and the cross-sectional area of ​​the net 2 under the action of the ocean current is small, the net 2 at the bottom is subjected to less force. It can be simply fixed by connecting its net rope to the net rope of the side net 2. Then, by suspending sinkers 6 on the bottom net 2, the net 2 is kept in a taut state to ensure the volume of the cage.

[0053] Furthermore, since the mesh structure of this invention achieves complete enclosure outside the guide frame foundation 1, including the pile legs 3, diagonal braces 4, etc., inside the net cage, a connecting structure can be added to the clamp plate to extend the eye plate 56 and strip frame 53 outwards, thereby expanding the water space for net cage aquaculture, provided that hydrodynamic requirements are met. Figure 7 As shown, a hollow pad 57 can be added for connection.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for constructing marine ranching cages for offshore wind power jacket foundations, characterized in that, The offshore wind turbine jacket foundation includes a pile platform, several pile legs (3) located at the lower end of the pile platform, and marine ranching cages. Several sets of diagonal braces (4) are arranged between two adjacent pile legs (3). Each set of diagonal braces (4) includes two X-shaped diagonal braces (4). Several triangular spaces are formed between the pile legs (3) and the diagonal braces (4). The marine ranching cages include several modular mounting components (5) that are installed in the triangular spaces and a netting assembly that surrounds the outer perimeter and bottom of the jacket foundation (1) through the modular mounting components (5). The modular mounting components (5) include three strips. The frame (53) consists of three strip frames (53) connected end to end to form a triangular structure. One strip frame (53) has several pile leg clamps (51) spaced apart along its length. The pile leg clamps (51) are used to hold the pile leg (3). The other two strip frames (53) have several diagonal bracing clamps (52) spaced apart along their length. The diagonal bracing clamps (52) are used to hold the diagonal brace (4). Eye plates (56) are provided on both the pile leg clamps (51) and the diagonal bracing clamps (52). The eye plates (56) and the strip frames (53) are used to install the netting assembly. The construction method includes: The modular installation component (5) of the cage is hoisted to the side of the guide frame foundation (1), and the float is fixed on the modular installation component (5); Install the diagonal brace clamp (52) onto the diagonal brace (4), and install the pile leg clamp (51) onto the pile leg (3); Install the mesh assembly onto the modular mounting component (5) of the mesh cage. The mesh assembly is divided into multiple mesh pieces (2) for installation.

2. The method for constructing marine ranching cages for offshore wind power jacket foundations according to claim 1, characterized in that, The pile leg clamp (51) is a semi-ring structure, which is used to connect with the corresponding pile leg clamp (51) on another cage modular installation component (5) through fasteners and to clamp the pile leg (3).

3. The method for constructing marine ranching cages for offshore wind power jacket foundations according to claim 1, characterized in that, The diagonal brace clamp (52) is a semi-ring structure, with its two ends connected by ropes (55) to hold the diagonal brace (4).

4. The method for constructing marine ranching cages for offshore wind power jacket foundations according to claim 1, characterized in that, A ring beam (54) is slidably fitted on the pile leg clamp (51) and / or the diagonal brace clamp (52), the ring beam (54) is fixedly connected to the corresponding strip frame (53), and the eye plate (56) is set on the ring beam (54).

5. A method for constructing marine ranching cages for offshore wind power jacket foundations according to claim 1, characterized in that, The eye plate (56) is connected to the corresponding clamp via a pad (57).

6. The method for constructing marine ranching cages for offshore wind power jacket foundations according to claim 1, characterized in that, The strip frame (53) includes several connecting strips, which are staggered with corresponding clamps, and adjacent clamps are connected by connecting strips.

7. A method for constructing marine ranching cages for offshore wind power jacket foundations according to claim 1, characterized in that, The strip frames (53) are welded together.

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