Offshore jacket and construction method thereof

Abstract

The invention provides an offshore jacket and a construction method thereof. The offshore jacket comprises a plurality of stand column pipe fittings, a plurality of supporting pipe fittings, a first continuous fiber reinforced layer, a second continuous fiber reinforced layer and a third continuous fiber reinforced layer, and the two ends of each supporting pipe fitting are connected with every two adjacent stand column pipe fittings correspondingly; the first continuous fiber reinforcing layer and the second continuous fiber reinforcing layer are laid on the surfaces of the stand column pipe fitting and the supporting pipe fitting in different directions. And the third continuous fiber reinforced layer is laid at the joint of the stand column pipe fitting and the supporting pipe fitting according to the stress distribution position. In the application, the first continuous fiber reinforcing layer and the second continuous fiber reinforcing layer are arranged to completely cover the surfaces of the stand column pipe fitting and the supporting pipe fitting, so that the corrosion resistance of the stand column pipe fitting and the supporting pipe fitting can be obviously improved, and forces from different directions are effectively dispersed and resisted; and the third continuous fiber reinforcing layer can enhance the stretching resistance and the shearing resistance at the joint, and the steel consumption and the maintenance frequency of the offshore jacket are reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of marine new energy structural engineering, and more specifically, to an offshore jacket and a construction method thereof. Background Art

[0002] The jacket is one of the main supporting structures for offshore wind turbines in my country, and pure steel jackets are currently the most widely used. However, as offshore wind turbines are rapidly developing towards large-scale and deep-sea applications, the jacket's working load is increasing, and the offshore distance and working water depth are increasing. The steel jacket structure has prominent problems such as difficulty in anti-corrosion maintenance, insufficient bearing capacity, easy fatigue damage, and a surge in steel consumption, which has led to a sharp increase in project costs and is unable to adapt to the development trend of offshore wind power in my country. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide an offshore jacket and a construction method thereof, so as to solve the technical problems existing in the prior art that offshore jackets made of steel pipes are prone to corrosion maintenance difficulties, insufficient bearing capacity, and fatigue damage.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an offshore jacket, comprising a plurality of column pipes, a plurality of support pipes, a first continuous fiber reinforcement layer, a second continuous fiber reinforcement layer and a third continuous fiber reinforcement layer, wherein the two ends of the support pipes are respectively connected to two adjacent column pipes; the first continuous fiber reinforcement layer is laid on the surface of the column pipes and the support pipes; the second continuous fiber reinforcement layer is laid on the surface of the column pipes and the support pipes; the laying direction of the second continuous fiber reinforcement layer is different from that of the first continuous fiber reinforcement layer; the third continuous fiber reinforcement layer is laid at the node between the column pipes and the support pipes, and the third continuous fiber reinforcement layer performs local and precise fiber laying according to the stress distribution position at the node.

[0005] Furthermore, the column pipe fitting includes a plurality of column tube bodies connected end to end and a plurality of column nodes, the column nodes are K-shaped, the column tube bodies and the column nodes are arranged at intervals, and the upper and lower ends of the column nodes are respectively connected to the ends of the two column tube bodies.

[0006] Furthermore, the supporting pipe fitting includes a supporting node and four supporting pipe bodies, the supporting node is X-shaped and has four ends, the four ends of the supporting node are respectively connected to one end of the four supporting pipe bodies; the two ends on the side of the column node are respectively connected to the other end of the two supporting pipe bodies.

[0007] Furthermore, the first continuous fiber reinforcement layer is axially laid on the surface of the column tube and / or the support tube, and the second continuous fiber reinforcement layer is circumferentially laid on the surface of the column tube and / or the support tube.

[0008] Furthermore, the third continuous fiber reinforcement layer is laid on the surfaces of the support node and the column node.

[0009] Furthermore, the offshore jacket also includes a supplementary reinforcement layer, which is laid at the connection between the column tube body and the column node, the connection between the support tube body and the support node, and the connection between the column node and the support tube body.

[0010] Furthermore, the continuous fibers used in the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer are any one or more combinations of carbon fiber, glass fiber, aramid fiber and basalt fiber; the composite material form of the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer is thermosetting or thermoplastic prepreg.

[0011] Furthermore, the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer are provided with multiple layers of fibers, and the direction of each layer of fibers can be flexibly adjusted and changed according to the stress state of the column tube body and the support tube body.

[0012] The present application also provides a method for constructing the above-mentioned offshore jacket, the method for constructing the offshore jacket comprising:

[0013] A steel tube matrix of a set length is processed to form the column tube body and the support tube body; a welding assembly section is reserved at the end of the steel tube matrix, and the length range outside the welding assembly section is a composite material reinforcement section, the weld of the steel tube matrix is ​​polished and smoothed, and the surface of the steel tube matrix is ​​rust-removed;

[0014] Using a continuous fiber automatic laying method, laying fibers along the axial direction of the steel pipe matrix within the composite material reinforcement section to form the first continuous fiber reinforcement layer; using a continuous fiber winding method, winding fibers along the circumference of the steel pipe matrix on the first continuous fiber reinforcement layer to form the second continuous fiber reinforcement layer; and then curing the fibers to form a whole with the steel pipe matrix;

[0015] The first continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the second continuous fiber reinforcement layer are sequentially laid in the area where the support node and the column node are located by using a continuous fiber automatic laying method, wherein the laying direction of the first continuous fiber reinforcement layer is axial, the third continuous fiber reinforcement layer is locally and precisely laid according to the stress distribution position in the area, and the laying direction of the second continuous fiber reinforcement layer is circumferential; and then the fibers are solidified to form a whole with the support node and the column node;

[0016] The column tube body and the column node, the support tube body and the support node, and the column node and the support tube body are welded at the welding assembly section, and a supplementary reinforcement layer is applied to the weld connection, and both ends of the supplementary reinforcement layer are overlapped with the first continuous fiber reinforcement layer and / or the second continuous fiber reinforcement layer.

[0017] Furthermore, the continuous fiber automatic laying method is operated by a multi-degree-of-freedom robot system.

[0018] The beneficial effects of the offshore jacket and its construction method provided by the present application are: compared with the prior art, in the present application, by setting the first continuous fiber reinforcement layer and the second continuous fiber reinforcement layer to completely cover the surface of the column pipe fittings and the support pipe fittings, the corrosion resistance of the column pipe fittings and the support pipe fittings can be significantly improved, the durability and structural performance of the jacket can be comprehensively enhanced, and the project cost can be reduced; the first continuous fiber reinforcement layer and the second continuous fiber reinforcement layer are laid along different directions, which can effectively disperse and resist forces from different directions, thereby improving the bending and torsion resistance of the jacket in harsh offshore environments; the third continuous fiber reinforcement layer performs local and precise fiber laying according to the stress distribution position at the node, which can enhance the tensile and shear resistance of the connection, reduce stress concentration at the connection, avoid strength damage and fatigue damage at the node, reduce the maintenance frequency of the offshore jacket, reduce the amount of steel used and the operation and maintenance costs during the use period, and has broad application prospects in the field of marine new energy support structure engineering technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of the structure of an offshore jacket provided in an embodiment of the present application;

[0021] Figure 2A schematic diagram of a forming process of a column pipe body and a support pipe body in an offshore jacket provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of a forming process of a column node in an offshore jacket provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of a forming process of a support node in an offshore jacket provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of a process for providing a supplementary reinforcement layer in an offshore jacket provided in an embodiment of the present application.

[0025] Among them, the reference numerals in the figure are:

[0026] 1-column tube body; 2-support tube body; 3-column node; 4-support node; 5-continuous fiber reinforcement layer; 6-steel tube matrix; 7-welding assembly section; 8-composite material reinforcement section; 9-preg; 10-weld area; 11-butt weld; 12-supplementary reinforcement layer. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] The offshore jacket provided by the embodiment of the present application is now described. The offshore jacket comprises a plurality of column pipes, a plurality of support pipes, and a continuous fiber reinforcement layer 5 covering the column pipes and the support pipes; wherein the continuous fiber reinforcement layer 5 comprises a first continuous fiber reinforcement layer, a second continuous fiber reinforcement layer and a third continuous fiber reinforcement layer, and the two ends of the support pipes are respectively connected to two adjacent column pipes; the first continuous fiber reinforcement layer is laid on the surface of the column pipes and the support pipes; the second continuous fiber reinforcement layer is laid on the surface of the column pipes and the support pipes; the second continuous fiber reinforcement layer is laid in a different direction from the first continuous fiber reinforcement layer; the third continuous fiber reinforcement layer is laid at the node of the column pipes and the support pipes, and the third continuous fiber reinforcement layer performs local and precise fiber laying according to the stress distribution position at the node.

[0032] In the present embodiment, the different laying directions of the second continuous fiber reinforcement layer and the first continuous fiber reinforcement layer means that the length directions of the fibers in the second continuous fiber reinforcement layer and the first continuous fiber reinforcement layer are not on the same straight line or are not parallel, that is, the length directions of the fibers in the second continuous fiber reinforcement layer and the first continuous fiber reinforcement layer are arranged at a certain angle, and the angle can range from 5° to 90°.

[0033] Compared with the prior art, the offshore jacket provided by the present application can significantly improve the corrosion resistance of the column pipe fittings and the support pipe fittings by setting the first continuous fiber reinforcement layer and the second continuous fiber reinforcement layer to completely cover the surface of the column pipe fittings and the support pipe fittings in the embodiment of the present application, and can comprehensively enhance the durability and structural performance of the jacket, thereby reducing the project cost; the first continuous fiber reinforcement layer and the second continuous fiber reinforcement layer are laid in different directions, which can effectively disperse and resist forces from different directions, thereby improving the bending and torsion resistance of the jacket in harsh offshore environments; the third continuous fiber reinforcement layer performs local and precise fiber laying according to the stress distribution position at the node, which can enhance the tensile and shear resistance at the node, reduce stress concentration at the node, avoid strength damage and fatigue damage at the node, reduce the maintenance frequency of the offshore jacket, reduce the amount of steel used and the operation and maintenance costs during the service life, and has broad application prospects in the field of marine new energy support structure engineering technology.

[0034] In one embodiment of the present application, see Figure 1The column pipe fitting includes a plurality of column pipe bodies 1 connected end to end and a plurality of column nodes 3, the column nodes 3 are K-shaped, the column pipe bodies 1 and the column nodes 3 are arranged at intervals, and the upper and lower ends of the column nodes 3 are respectively connected to the ends of the two column pipe bodies 1.

[0035] In this embodiment, by providing multiple column tube bodies 1 and multiple column nodes 3, the prefabrication and production of the column tube bodies 1 can be facilitated, the on-site reinforcement work at sea is reduced, and the difficulty of construction and maintenance is reduced; at the same time, the sizes of the column tube bodies 1 and the column nodes 3 are relatively small, which can be convenient for loading and transportation.

[0036] In one embodiment of the present application, see Figure 1 The supporting pipe fitting includes a supporting node 4 and four supporting pipe bodies 2. The supporting node 4 is X-shaped and has four ends. The four ends of the supporting node 4 are respectively connected to one end of the four supporting pipe bodies 2; the two ends on the side of the column node 3 are respectively connected to the other ends of the two supporting pipe bodies 2.

[0037] In this embodiment, by providing the support pipe body 2 and the support node 4, the prefabrication and production of the support pipe body 2 can be facilitated, and no on-site reinforcement operations at sea are required, thereby reducing the difficulty of construction and maintenance; at the same time, the sizes of the support pipe body 2 and the support node 4 are relatively small, which can be conveniently loaded and transported.

[0038] In one embodiment of the present application, the first continuous fiber reinforcement layer is laid on the surface of the column tube and / or the support tube along the axial direction, and the second continuous fiber reinforcement layer is laid on the surface of the column tube and / or the support tube along the circumferential direction.

[0039] In this embodiment, the first continuous fiber reinforcement layer is formed by continuous fibers wound on the surface of the support tube body 2. The fibers are continuous and uninterrupted, which can enhance the axial strength of the column tube body 1 and the support tube body 2. The second continuous fiber reinforcement layer is wound around the outer periphery of the column tube body 1 and the support tube body 2 to enhance their circumferential compression and torsion resistance. This structural design not only improves the structural stability of the support tube body 2, but also achieves effective resistance to different force directions through the reasonable layout of the fibers.

[0040] It can be understood that the first continuous fiber reinforcement layer is laid on the surface of the column tube and / or the support tube along the axial direction, which means that the angle between the fibers in the first continuous fiber reinforcement layer and the axial direction of the column tube body 1 or the support tube body 2 is 0° or a small angle close to 0° with the axis; the second continuous fiber reinforcement layer is laid on the surface of the column tube and / or the support tube along the circumferential direction, which means that the angle between the fibers in the second continuous fiber reinforcement layer and the axial direction of the column tube body 1 or the support tube body 2 is 90° or a large angle close to 90° with the axis.

[0041] In one embodiment of the present application, the third continuous fiber reinforcement layer is laid on the surface of the support node 4 and the column node 3 .

[0042] In this embodiment, by providing a third continuous fiber reinforcement layer, the continuous fibers can be laid all over the offshore jacket without dead angles; the laying method of the third continuous fiber reinforcement layer is similar to that of the first and second continuous fiber reinforcement layers, but it mainly performs local and precise fiber laying according to the stress distribution positions of the support nodes 4 and the column nodes 3, so as to further strengthen the structural strength of the offshore jacket. By laying the third continuous fiber reinforcement layer on the surface of the support nodes 4 and the column nodes 3, the tensile and shear resistance of these key parts can be significantly improved, thereby ensuring the stability and safety of the entire offshore jacket under heavy loads and harsh environmental conditions. In addition, the use of the third continuous fiber reinforcement layer can also reduce fatigue damage caused by stress concentration and extend the service life of the jacket. In practical applications, the laying of the third continuous fiber reinforcement layer can be adjusted according to specific design requirements and engineering needs to achieve the best structural strengthening effect.

[0043] In one embodiment of the present application, see Figure 5 The offshore jacket also includes a supplementary reinforcement layer 12, which is laid at the connection between the column pipe body 1 and the column node 3, the connection between the support pipe body 2 and the support node 4, and the connection between the column node 3 and the support pipe body 2.

[0044] In one embodiment of the present application, the continuous fibers used in the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer 12 are any one or more combinations of carbon fiber, glass fiber, aramid fiber and basalt fiber; the composite material form of the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer 12 is a thermosetting or thermoplastic prepreg 9.

[0045] In this embodiment, carbon fiber, glass fiber, aramid fiber, and basalt fiber all have excellent mechanical properties and corrosion resistance, and are ideal materials for manufacturing continuous fiber reinforcement layers. Carbon fiber, due to its high strength and low density, is particularly suitable for situations where it is necessary to reduce the weight of the structure while maintaining high rigidity. Glass fiber is widely used in various industrial fields due to its high cost-effectiveness and good chemical corrosion resistance. Aramid fiber provides additional protection in extreme environments with its excellent tensile strength and high temperature resistance. Basalt fiber has become a sustainable alternative due to its environmentally friendly characteristics. Thermosetting prepregs form a stable three-dimensional network structure during the curing process and provide good mechanical properties; while thermoplastic prepregs have the advantages of repeatable processing and repair, and are suitable for structures that require frequent maintenance or replacement. By rationally selecting continuous fibers and composite material forms, the most suitable offshore jacket reinforcement solution can be customized for different application requirements and environmental conditions.

[0046] In one embodiment of the present application, the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer 12 are provided with multiple layers of fibers.

[0047] In one embodiment of the present application, the number of fiber layers of the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, and the third continuous fiber reinforcement layer can be adjusted according to the size of the offshore jacket and the expected load requirements. For example, for large offshore jackets, the number of fiber layers may need to be increased to provide sufficient structural strength and stiffness. On the contrary, for smaller jackets or jackets with lower load requirements, the number of fiber layers can be reduced accordingly to reduce cost and weight. In addition, by increasing the number of fiber layers, the mechanical properties of the jacket can be further optimized, such as improving fatigue resistance and extending service life. In practical applications, the determination of the number of fiber layers needs to comprehensively consider cost, performance, and engineering requirements to ensure the reliability and economy of the offshore jacket under various environmental conditions.

[0048] The present application also provides a method for constructing the above-mentioned offshore jacket, and the method for constructing the offshore jacket comprises:

[0049] A steel tube matrix 6 of a set length is processed to form a column tube body 1 and a support tube body 2; a welding assembly section 7 is reserved at the end of the steel tube matrix 6, and the length range outside the welding assembly section 7 is a composite material reinforcement section 8, the weld seam of the steel tube matrix 6 is polished and smoothed, and the surface of the steel tube matrix 6 is rust-removed;

[0050] Using the continuous fiber automatic laying method, please refer to Figure 2, laying fibers along the axial direction of the steel tube matrix 6 within the composite material reinforcement section 8 to form a first continuous fiber reinforcement layer; using a continuous fiber winding method, winding fibers along the circumference of the steel tube matrix 6 on the first continuous fiber reinforcement layer to form a second continuous fiber reinforcement layer; and then curing the fibers to form a whole with the steel tube matrix 6;

[0051] Using the continuous fiber automatic laying method, please refer to Figure 3 and Figure 4 , the first continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the second continuous fiber reinforcement layer are laid in sequence in the area where the support node 4 and the column node 3 are located, wherein the laying direction of the first continuous fiber reinforcement layer is axial, the third continuous fiber reinforcement layer is locally and accurately laid according to the stress distribution position in the area, and the laying direction of the second continuous fiber reinforcement layer is circumferential; and then the fibers are solidified to form a whole with the support node 4 and the column node 3;

[0052] The column tube body 1 and the column node 3, the support tube body 2 and the support node 4, and the column node 3 and the support tube body 2 are welded at the welding assembly section 7, and a supplementary reinforcement layer is applied to the weld joint, and both ends of the supplementary reinforcement layer are overlapped with the first continuous fiber reinforcement layer and / or the second continuous fiber reinforcement layer.

[0053] Among them, the support node 4 is an X-shaped intersecting node, and the column node 3 is a K-shaped intersecting node; please refer to Figure 5 The weld is in the form of a butt weld 11. After the weld surface is polished and smoothed, a supplementary reinforcement layer is applied to the weld joint using a movable winding device, a wet laying method, or a composite material sleeve method. The fiber direction in the supplementary reinforcement layer includes the axial direction and the circumferential direction, and both ends of the supplementary reinforcement layer have a sufficiently long overlap length with the first continuous fiber reinforcement layer and / or the second continuous fiber reinforcement layer.

[0054] Compared with the prior art, the offshore jacket construction method provided by the present application can effectively control the construction quality of the offshore jacket, while reducing on-site construction time and improving construction efficiency. In addition, since the prefabricated pipe body and reinforcement layer can be produced in a standardized manner, the production cost can be further reduced and the economic benefit can be improved. During the construction of the offshore jacket, the laying method and material selection of the reinforcement layer can be flexibly adjusted according to the actual marine environmental conditions and engineering requirements to ensure the structural safety and long-term stable operation of the jacket.

[0055] In one embodiment of the present application, the continuous fiber automatic laying method is operated by a multi-degree-of-freedom robot system, and the direction of each layer of fibers can be flexibly changed according to the stress state of the column tube body 1 and the support tube body 2.

[0056] In one embodiment of the present application, the multi-degree-of-freedom robot system can accurately control the laying angle and position of the fiber to ensure the uniformity and consistency of the continuous fiber reinforcement layer. Through programming control, the robot system can realize the automation and personalization of fiber laying in different areas, thereby meeting the special requirements of strength and stiffness in different parts of the offshore jacket. In addition, the use of the robot system can also reduce the errors of manual operation and improve the accuracy and reliability of the overall construction process.

[0057] In one embodiment of the present application, the construction method of the offshore jacket also includes performing non-destructive testing on the welding parts to ensure that the welding quality meets the design standards. Non-destructive testing technologies such as ultrasonic testing and radiographic testing can effectively detect welding defects such as cracks and pores, thereby ensuring the integrity of the welded joints and the overall safety of the offshore jacket.

[0058] In one embodiment of the present application, the offshore jacket construction method further includes conducting an overall quality assessment on the completed jacket, including a structural strength test, a corrosion resistance test, etc. Through these tests, it can be verified whether the jacket meets the design requirements and engineering standards, and its performance and life in actual use can be ensured.

[0059] In one embodiment of the present application, the offshore jacket construction method further includes effectively managing waste during the construction process to reduce the impact on the environment. For example, waste generated when cutting the steel pipe matrix 6 can be recycled, and waste generated when laying composite materials can be classified and processed to ensure that the construction activities meet environmental protection requirements.

[0060] Compared with the prior art, the technology of the present invention has the following outstanding advantages:

[0061] (1) The first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer and the third continuous fiber reinforcement layer completely cover the surface of the steel pipe substrate 6, which significantly improves the corrosion resistance of the steel, reduces the maintenance frequency of the deep-sea jacket, and reduces the operation and maintenance costs during the service life;

[0062] (2) Continuous fiber winding and automatic laying technology can flexibly arrange the fiber direction according to the stress characteristics of column pipes, support pipes, support nodes 4 and column nodes 3, and comprehensively enhance the strength and stiffness of pipes and nodes, which can significantly reduce the amount of steel used, reduce the weight of the jacket, and save material costs and construction costs;

[0063] (3) The weld area 10 of the support node 4 and the column node 3 is in a complex stress state, such as Figure 4As shown, fatigue failure is very likely to occur. The continuous fiber composite reinforcement layer can reduce the fatigue stress in the weld area of ​​the support node 4 and the column node 3, constrain the deformation of the steel pipe at the support node 4 and the column node 3, improve the fatigue resistance of the support node 4 and the column node 3, and extend the fatigue life of the offshore jacket.

[0064] (4) The first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer and the third continuous fiber reinforcement layer are manufactured by a robot-assisted system, and the manufacturing process is highly automated and standardized, and the construction is convenient;

[0065] (5) Compared with the hand-laid fiber cloth reinforcement method used in traditional steel structures, this application significantly reduces the manufacturing defects of the reinforcement layer, the reinforcement effect is more comprehensive, all components can be prefabricated onshore, and no on-site reinforcement work at sea is required, which reduces the difficulty of construction and maintenance;

[0066] (6) For the conductor frame structure using high-strength steel, by providing the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer and the third continuous fiber reinforcement layer, the insufficient strength of the high-strength steel welding point can be effectively compensated.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An offshore jacket, characterized in that: include: Multiple column fittings; A plurality of supporting pipes, wherein two ends of the supporting pipes are respectively connected to two adjacent column pipes; a first continuous fiber reinforcement layer; The first continuous fiber reinforcement layer is laid on the surface of the column pipe and the support pipe; A second continuous fiber reinforcement layer; the second continuous fiber reinforcement layer is laid on the surface of the column pipe and the support pipe; the second continuous fiber reinforcement layer and the first continuous fiber reinforcement layer are laid in different directions; The third continuous fiber reinforcement layer is laid at the node between the column pipe and the support pipe, and the third continuous fiber reinforcement layer performs local and precise fiber laying according to the stress distribution position at the node.

2. The offshore jacket according to claim 1, characterized in that: The column pipe fitting comprises a plurality of column pipe bodies connected end to end and a plurality of column nodes, wherein the column nodes are K-shaped, and the upper and lower ends of the column nodes are respectively connected to the ends of two column pipe bodies.

3. The offshore jacket according to claim 2, characterized in that: The supporting pipe fitting includes a supporting node and four supporting pipe bodies. The supporting node is X-shaped and has four ends. The four ends of the supporting node are respectively connected to one end of the four supporting pipe bodies; the two ends on the side of the column node are respectively connected to the other end of the two supporting pipe bodies.

4. The offshore jacket according to claim 3, characterized in that: The first continuous fiber reinforcement layer is axially laid on the surface of the column tube and / or the support tube, and the second continuous fiber reinforcement layer is circumferentially laid on the surface of the column tube and / or the support tube.

5. The offshore jacket according to claim 4, characterized in that: The third continuous fiber reinforcement layer is laid on the surfaces of the support node and the column node.

6. The offshore jacket according to claim 5, characterized in that: The offshore jacket further comprises a supplementary reinforcement layer, which is laid at the connection between the column tube body and the column node, the connection between the support tube body and the support node, and the connection between the column node and the support tube body.

7. The offshore jacket according to claim 6, characterized in that: The continuous fibers used in the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer are any one or more combinations of carbon fiber, glass fiber, aramid fiber and basalt fiber; The composite material of the first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer is in the form of a thermosetting or thermoplastic prepreg.

8. The offshore jacket according to claim 6, characterized in that: The first continuous fiber reinforcement layer, the second continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the supplementary reinforcement layer are provided with multiple layers of fibers; the direction of each layer of fibers can be flexibly adjusted and changed according to the stress state of the column pipe fittings and the support pipe fittings.

9. A method for constructing an offshore jacket, used to construct the offshore jacket according to any one of claims 6 to 8, characterized in that: The offshore jacket construction method comprises: A steel tube matrix of a set length is processed to form the column tube body and the support tube body; a welding assembly section is reserved at the end of the steel tube matrix, and the length range outside the welding assembly section is a composite material reinforcement section, the weld of the steel tube matrix is ​​polished and smoothed, and the surface of the steel tube matrix is ​​rust-removed; Using a continuous fiber automatic laying method, laying fibers along the axial direction of the steel pipe matrix within the composite material reinforcement section to form the first continuous fiber reinforcement layer; using a continuous fiber winding method, winding fibers along the circumference of the steel pipe matrix on the first continuous fiber reinforcement layer to form the second continuous fiber reinforcement layer; and then curing the fibers to form a whole with the steel pipe matrix; The first continuous fiber reinforcement layer, the third continuous fiber reinforcement layer and the second continuous fiber reinforcement layer are sequentially laid in the area where the support node and the column node are located by using a continuous fiber automatic laying method, wherein the laying direction of the first continuous fiber reinforcement layer is axial, the third continuous fiber reinforcement layer is locally and precisely laid according to the stress distribution position in the area, and the laying direction of the second continuous fiber reinforcement layer is circumferential; and then the fibers are solidified to form a whole with the support node and the column node; The column tube body and the column node, the support tube body and the support node, and the column node and the support tube body are welded at the welding assembly section, and a supplementary reinforcement layer is applied to the weld connection, and both ends of the supplementary reinforcement layer are overlapped with the first continuous fiber reinforcement layer and / or the second continuous fiber reinforcement layer.

10. The method for constructing an offshore jacket according to claim 9, characterized in that: The continuous fiber automatic laying method is operated by a multi-degree-of-freedom robot system.

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