Offshore single-pile self-turning-over construction technology

Abstract

The invention relates to an offshore single pile self-turnover construction process applied to the field of hoisting, which comprises the following steps: fixing a steel cable penetrating through a pile cylinder with a positioning disc on a pile stabilizing platform, pushing the pile cylinder to the positioning disc by rolling the steel cable during positioning, performing coarse positioning on the pile cylinder, and turning over the pile cylinder during turnover. The rotatable and liftable positioning disc is used for driving the pile barrel to turn over in seawater, the operation that multiple cranes cooperatively work to conduct coarse positioning in the traditional technology is replaced, the coarse positioning operation difficulty is lowered, pile turning of the pile barrel in the air is not needed, and the power requirement for a winch is lowered; meanwhile, the pile barrel is limited through a positioning disc and a locking device, the probability that the pile barrel deviates greatly in the overturning process is reduced, and the safety of pile overturning operation and the pile overturning efficiency are improved; in addition, the pile barrel and the positioning disc are elastically abutted through a guide rod, a limiting spring and a spring telescopic rod, the device adapts to the up-and-down floating installation environment of a marine ship, and collision damage between equipment is reduced.

Description

Technical Field

[0001] This invention relates to a monopile construction process, and more particularly to a marine monopile self-turning construction process applicable to the field of hoisting. Background Technology

[0002] Offshore pile flipping construction technology is the core technology for monopile foundation installation in offshore wind power and other projects. Traditional technology requires multiple ships to work together, and the pile is flexibly connected by steel cables. The positioning and installation are completed through steps such as lifting, flipping, and mud adjustment. Its pain points are that the scheduling of multiple ships is complicated, and the steel cables are easily affected by sea wind and ship hull fluctuations, which can cause the pile to swing, resulting in low positioning accuracy and high operation risk.

[0003] The existing patent with publication number CN115584727B discloses a method for offshore construction of ultra-large monopiles. It uses a fully rotating crane vessel in conjunction with a bottom-mounted pile stabilization platform, combined with a balance beam main sling and a pile-turning clamp auxiliary sling, and utilizes single-ship single-hook stern lifting technology to realize the offshore construction of ultra-large monopiles: after the transport ship and the crane vessel are moored parallel to each other and the slings are installed, the main crane of the crane vessel adjusts the transport ship to the stern lifting position through the cable to complete the lifting, turning and precise planting of the monopile.

[0004] The aforementioned prior art discloses the use of a single crane ship and transport ship to achieve positioning and pile planting operations, which simplifies the traditional operation process of multiple crane ships working together. However, the positions of the crane ship and transport ship still need to be adjusted before the pile is lifted, making the positioning operation of the pile cumbersome. Summary of the Invention

[0005] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that the positioning operation of the existing pile-turning process is cumbersome.

[0006] To address the above problems, this invention provides a self-turning construction process for offshore monopiles, comprising the following steps:

[0007] Step 1, preparation work; transport the pile stabilization platform to the construction site and install it, then hoist the pile cylinder onto the construction vessel and transport it to the construction site;

[0008] Step two, securing the steel cable, includes the following sub-steps:

[0009] S1. Adjust the height of the positioning plate on the pile stabilization platform to make it the same height as the pile tube on the construction vessel. Then start the construction vessel so that the bottom of the pile tube at the top of the construction vessel is opposite to the positioning plate. Finally, drop the four anchor chains around the construction vessel to fix the position of the construction vessel.

[0010] S2, fix the first chuck and the second chuck inside the pile tube near the openings on both sides, and then pass the steel cable of the construction vessel through the first chuck and the second chuck;

[0011] S3, fix the end of the steel cable to the center position of the positioning plate on the pile stabilization platform;

[0012] Step 3, rough positioning; start the winch to wind up the steel cable. The steel cable will drive the pile cylinder to slide on the construction boat and move closer to the positioning plate until the tail of the pile cylinder abuts against the positioning plate. Then, turn off the winch and start the locking device fixed on the first chuck to lock the steel cable to the first chuck.

[0013] Step 4, pile flipping; restart the winch, the steel cable drives the pile cylinder to flip around the positioning plate as the fulcrum, at the same time, start the traction mechanism, the traction mechanism drives the sliding frame to move downward, the sliding frame drives the positioning plate hinged to it to move downward until the pile cylinder reaches a vertical state.

[0014] Step 5, precise positioning; activate the first and second clamping frames to hold and squeeze the pile cylinder for positioning.

[0015] Step 6: Release the positioning plate; start the traction mechanism to release the sliding frame. The sliding frame slides down the guide rail. When the sliding frame slides to the lower part of the guide rail, the positioning plate moves away from the pile cylinder.

[0016] Step 7: Piles sink to the bottom; start the winch to release the steel cable so that the lower end of the pile comes into contact with the seabed silt layer;

[0017] Step 8: Recover the steel cable, the first chuck, and the second chuck;

[0018] Step nine: Use the hydraulic hammer installed on the construction vessel to hammer the pile cylinder and install it. After installation, disassemble and retrieve the pile stabilization platform.

[0019] In the above-mentioned offshore monopile self-turning construction process, the pile cylinder is quickly positioned by using steel cables and positioning plates, which simplifies the pile cylinder positioning operation.

[0020] As a further improvement of this application, the positioning disk includes a fixed disk hinged to the sliding frame, and a movable disk is fixedly connected to the fixed disk by a plurality of spring telescopic rods; a plurality of guide rods are slidably connected to the outer wall of the movable disk in a circumferentially evenly distributed manner, and the guide rods include a horizontal part near the movable disk and an inclined part integrally formed with the horizontal part; a guide post is fixedly connected inside the movable disk and slidably connected to the guide rod, and a limiting spring is sleeved on the guide post and abuts against the guide rod.

[0021] As a further improvement of this application, multiple load-bearing rollers and limiting rollers are fixedly connected to the deck of the construction vessel, which are equidistantly distributed along the length of the hull. The load-bearing rollers are horizontal rollers, and the limiting rollers are vertical rollers. An extension frame is fixedly connected to the stern of the construction vessel, and a winch is fixed at the end of the extension frame away from the construction vessel. A hydraulic hammer is also installed on the construction vessel.

[0022] As a further improvement of this application, both the first chuck and the second chuck are slidably connected to the steel cable and have the same structure. The first chuck includes an annular airbag fixed on its outer circumference, and an inflation / deflation pump is fixedly connected to the inner side of the annular airbag. The inflation / deflation pump is fixed inside the first chuck.

[0023] As a further improvement of this application, the locking device includes a housing fixedly connected to the first chuck, a through cavity for the steel cable to pass through, a compression plate slidably connected in the through cavity, a sliding end of an electric push rod fixedly connected to the compression plate, and a fixed end of the electric push rod fixedly connected to the housing.

[0024] As a further improvement of this application, a guide frame is fixedly connected to the outer wall of the first chuck. The guide frame includes a horizontal rod fixedly connected to the outer wall of the first chuck, a vertical rod that is hinged to the outer end of the horizontal rod and perpendicularly abuts against it, and a guide ring is fixedly connected to the upper end of the vertical rod.

[0025] As a further improvement of this application, a plug is fixedly connected to the end of the steel cable, and a locking block that engages with the plug is fixedly connected to the center of the outer wall of the positioning plate. An electrically controlled pin is fixedly connected to the locking block, and the electrically controlled pin passes through the locking block and is inserted into the plug.

[0026] As a further improvement of this application, the traction mechanism includes a traction rope fixedly connected to the sliding frame and a winding machine fixedly wound around the traction rope, and the guide rail is J-shaped and fixedly connected to the pile stabilization platform.

[0027] As a further improvement of this application, the first bracket and the second bracket have the same structure. The first bracket includes a mirror-image arc-shaped part and a rotating mechanism for driving the arc-shaped part to rotate. The inner wall of the arc-shaped part is rotatably connected with equidistant and evenly distributed balls.

[0028] In summary, this invention fixes the steel cable passing through the pile tube to the positioning plate on the pile stabilization platform. During positioning, the pile tube is pushed towards the positioning plate by winding the steel cable for coarse positioning. During rotation, the rotatable and liftable positioning plate drives the pile tube to rotate in seawater. This replaces the traditional process of using multiple cranes for coarse positioning, reducing the difficulty of coarse positioning and eliminating the need to rotate the pile tube in the air, thus reducing the power requirements of the winches. At the same time, the positioning plate and locking device limit the position of the pile tube, reducing the probability of large displacement during pile rotation and improving the safety and efficiency of pile rotation. In addition, the guide rod, limit spring, and spring telescopic rod achieve elastic contact between the pile tube and the positioning plate, adapting to the floating installation environment of ships at sea and further reducing collision damage between equipment. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the construction vessel and the pile stabilization platform in this application;

[0030] Figure 2 This is a schematic diagram showing the connection between the steel cable and the positioning plate in this application.

[0031] Figure 3 This is a schematic diagram illustrating the state in which the steel cable pushes the pile cylinder closer to the positioning plate in this application;

[0032] Figure 4 This is a schematic diagram of the pile-turning state of the pile tube in this application;

[0033] Figure 5 This is a schematic diagram of the pile clamping state in this application;

[0034] Figure 6 This is a schematic diagram showing the positioning plate detached from the pile tube in this application;

[0035] Figure 7 This is a cross-sectional structural diagram of the construction vessel and the pile stabilization platform in this application;

[0036] Figure 8 for Figure 7 Enlarged structural diagram at point A;

[0037] Figure 9 This is a schematic diagram of the exploded assembly structure of the first chuck and guide frame in this application;

[0038] Figure 10 for Figure 7 Enlarged structural diagram at point B;

[0039] Figure 11 This is a schematic diagram of the assembly structure of the positioning disk and guide rail in this application;

[0040] Figure 12 This is a schematic diagram of the exploded assembly structure of the positioning disk in this application.

[0041] Explanation of the labels in the diagram:

[0042] 1. Construction vessel; 2. Pile stabilizing platform; 3. Pile casing; 4. Bearing roller; 5. Limiting roller; 6. Steel cable; 7. Winch; 8. Extension frame; 9. First chuck; 10. Second chuck; 11. Positioning plate; 1101. Fixed plate; 1102. Moving plate; 1103. Spring telescopic rod; 1104. Water inlet; 12. Sliding frame; 13. Guide rail; 14. Traction mechanism; 1401. Traction rope; 1402 15. Winding machine; 16. First support frame; 17. Second support frame; 18. Annular airbag; 19. Inflation and deflation pump; 10. Locking device; 1901. Housing; 1902. Extrusion sheet; 1903. Electric push rod; 20. Guide frame; 21. Horizontal bar; 22. Vertical bar; 23. Guide ring; 24. Guide rod; 25. Insert block; 26. Locking block; 27. Electrically controlled pin; 28. Guide column; 29. ​​Limiting spring. Detailed Implementation

[0043] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0044] Implementation method 1:

[0045] Figures 1-10 A self-turning construction process for a marine monopile is shown, including the following steps:

[0046] Step 1, preparation work; transport the pile stabilization platform 2 to the construction location and install it, then hoist the pile cylinder 3 onto the construction vessel 1 and transport it to the construction location;

[0047] Step 2, please refer to Figure 2 The process of fixing steel cable 6 includes the following sub-steps:

[0048] S1. Adjust the height of the positioning plate 11 on the pile stabilization platform 2 to make it the same height as the pile tube 3 on the construction vessel 1. Then start the construction vessel 1 so that the bottom of the pile tube 3 at the top of the construction vessel 1 is opposite to the positioning plate 11. Finally, drop the four anchor chains around the construction vessel 1 to fix the position of the construction vessel 1.

[0049] S2, fix the first chuck 9 and the second chuck 10 inside the pile tube 3 near the openings on both sides, and then pass the steel cable 6 of the construction vessel 1 through the first chuck 9 and the second chuck 10.

[0050] S3, fix the end of the steel cable 6 to the center position of the positioning plate 11 on the pile stabilization platform 2;

[0051] Step 3, please refer to Figure 3 Rough positioning; start the winch 7 to wind up the steel cable 6. The steel cable 6 drives the pile cylinder 3 to slide on the construction vessel 1 and move closer to the positioning plate 11 until the tail of the pile cylinder 3 abuts against the positioning plate 11. Then, turn off the winch 7 and start the locking device 19 fixed on the first chuck 9 to lock the steel cable 6 to the first chuck 9.

[0052] Step four, please refer to Figure 4 Turn the pile over; restart the winch 7, the steel cable 6 drives the pile cylinder 3 to turn over with the positioning plate 11 as the fulcrum, at the same time, start the traction mechanism 14, the traction mechanism 14 drives the sliding frame 12 to move downward, the sliding frame 12 drives the positioning plate 11 hinged to it to move downward until the pile cylinder 3 reaches the vertical state.

[0053] Step 5, please refer to Figure 5 Precise positioning; activate the first clamping frame 15 and the second clamping frame 16 to clamp the pile tube 3 and squeeze and position the pile tube 3;

[0054] Step Six, please refer to Figure 6Release the positioning disc 11; start the traction mechanism 14 to release the sliding frame 12. The sliding frame 12 slides down along the guide rail 13. When the sliding frame 12 slides to the lower part of the guide rail 13, the positioning disc 11 moves away from the pile cylinder 3.

[0055] Step 7: The pile 3 sinks to the bottom; start the winch 7 to release the steel cable 6 so that the lower end of the pile 3 comes into contact with the seabed silt layer.

[0056] Step 8: Recover steel cable 6, first chuck 9, and second chuck 10;

[0057] Step 9: Use the hydraulic hammer installed on the construction vessel 1 to hammer the pile cylinder 3 to install it. After installation, disassemble and retrieve the pile stabilizing platform 2.

[0058] It should be noted that the hydraulic hammer (not shown in the figure) is prior art and will not be described in detail in this application.

[0059] Compared to traditional monopile construction techniques, this invention fixes the steel cable 6 passing through the pile cylinder 3 to the positioning plate 11 on the pile stabilization platform 2. During positioning, the pile cylinder 3 is pushed towards the positioning plate 11 by winding the steel cable 6 for coarse positioning. During flipping, the rotatable and liftable positioning plate 11 drives the pile cylinder 3 to flip in the seawater, replacing the traditional method of using multiple cranes for coarse positioning. This reduces the difficulty of coarse positioning, eliminates the need to flip the pile cylinder 3 in the air, and reduces the power requirement of the winch 7. At the same time, the positioning plate 11 and locking device 19 limit the position of the pile cylinder 3, reducing the probability of large displacement during the flipping process and improving the safety and efficiency of the flipping operation.

[0060] Please see Figure 1 On the deck of the construction vessel 1, there are multiple load-bearing rollers 4 and limiting rollers 5 that are equidistantly distributed along the length of the hull. The load-bearing rollers 4 are horizontal rollers and the limiting rollers 5 are vertical rollers.

[0061] Specifically, the bearing roller 4 supports the pile cylinder 3 and provides sliding support when the pile cylinder 3 slides, which facilitates the close operation of the pile cylinder 3 and the positioning plate 11. The limiting roller 5 limits the pile cylinder 3 in the horizontal direction.

[0062] Please see Figure 7 The construction vessel 1 is fixedly connected to an extension frame 8 at its stern. The winch 7 is fixed at the end of the extension frame 8 away from the construction vessel 1. A hydraulic hammer is also installed on the construction vessel 1.

[0063] Specifically, when the construction vessel 1 is operating, the right end of the extension frame 8 is located to the right of the center of the first support frame 15. When the winch 7 winds up the steel cable 6, the steel cable 6 pushes the pile cylinder 3 to move towards the positioning plate 11. At the same time, when the pile is turned over, the steel cable 6 and the positioning plate 11 cooperate to pull the pile cylinder 3 into a vertical state.

[0064] Please see Figure 8 and Figure 9 Both the first chuck 9 and the second chuck 10 are slidably connected to the steel cable 6 and have the same structure. The first chuck 9 includes an annular airbag 17 fixed on its outer circumference. An inflation pump 18 is fixedly connected to the inner side of the annular airbag 17 and is fixed inside the first chuck 9.

[0065] Specifically, when installing the first chuck 9, the inflation pump 18 is started to inflate the annular airbag 17, so that the annular airbag 17 abuts against the inner wall of the pile cylinder 3, thereby fixing the first chuck 9 to the pile cylinder 3. When removing the first chuck 9, the inflation pump 18 is started to deflate the annular airbag 17, so that the annular airbag 17 is no longer in contact with the inner wall of the pile cylinder 3. In summary, this facilitates the assembly and disassembly of the first chuck 9 and the second chuck 10 from the pile cylinder 3.

[0066] Please see Figure 8 and Figure 9 The locking device 19 includes a housing 1901 fixedly connected to the first chuck 9. The housing 1901 has a through cavity for the steel cable 6 to pass through. A compression plate 1902 is slidably connected in the through cavity. The compression plate 1902 is fixedly connected to the sliding end of an electric push rod 1903. The fixed end of the electric push rod 1903 is fixedly connected to the housing 1901.

[0067] Specifically, when it is necessary to fix the steel cable 6 to the first chuck 9, the electric push rod 1903 is activated, and the electric push rod 1903 drives the extrusion plate 1902 to fix the steel cable 6 in the cavity.

[0068] Please see Figure 8 and Figure 9 A guide frame 20 is fixedly connected to the outer wall of the first chuck 9. The guide frame 20 includes a horizontal rod 21 fixedly connected to the outer wall of the first chuck 9. A vertical rod 22 is hinged to the outer end of the horizontal rod 21 and perpendicularly abuts against it. A guide ring 23 is fixedly connected to the upper end of the vertical rod 22.

[0069] Specifically, before passing through the first chuck 9, the steel cable 6 passes through the guide ring 23, and the guide frame 20 guides the steel cable 6 to avoid frictional interference between the steel cable 6 and the pile cylinder 3; and during the pile turning process of the pile cylinder 3, the vertical rod 22 rotates along the horizontal rod 21 to improve the smoothness of the traction of the steel cable 6.

[0070] Please see Figure 10The end of the steel cable 6 is fixedly connected to a plug 25. The center of the outer wall of the positioning plate 11 is fixedly connected to a locking block 26 that engages with the plug 25. An electric control pin 27 is fixedly connected to the locking block 26. The electric control pin 27 passes through the locking block 26 and is inserted into the plug 25.

[0071] Specifically, the extension and retraction of the electrically controlled pin 27 enables the rapid connection and disconnection of the steel cable 6 from the positioning plate 11, facilitating the recovery of the steel cable 6.

[0072] Please see Figure 7 The traction mechanism 14 includes a traction rope 1401 fixedly connected to the sliding frame 12 and a winding machine 1402 fixedly wound around the traction rope 1401. The guide rail 13 is J-shaped and fixedly connected to the pile stabilizing platform 2.

[0073] Specifically, the winding machine 1402 winds and releases the traction rope 1401, causing the sliding frame 12 to move the positioning plate 11 up and down. When the sliding frame 12 moves to the lower part of the guide rail 13, the sliding frame 12 drives the positioning plate 11 to slide horizontally, so that the positioning plate 11 is removed from the position below the pile cylinder 3, which facilitates the removal operation of the positioning plate 11.

[0074] Please see Figure 1 The first bracket 15 and the second bracket 16 have the same structure. The first bracket 15 includes a mirror-image arc-shaped part and a rotating mechanism that drives the arc-shaped part to rotate. The inner wall of the arc-shaped part is rotatably connected with evenly distributed balls at equal intervals.

[0075] Specifically, the first and second bearing brackets 15 and 16, which have ball bearings, guide the pile tube 3 during sinking and hammering, thereby improving installation accuracy.

[0076] The second implementation method:

[0077] Figures 10-12 This invention illustrates a self-turning construction process for a single pile at sea. Based on the first embodiment, the positioning plate 11 includes a fixed plate 1101 hinged to the sliding frame 12. The fixed plate 1101 is fixedly connected to a movable plate 1102 by a plurality of spring telescopic rods 1103.

[0078] Specifically, by providing a spring telescopic rod 1103, the tail of the pile 3 makes elastic contact with the positioning plate 11, reducing the rigid impact of the pile 3 on the positioning plate 11 in the horizontal direction, improving safety, and reducing the probability of impact damage caused by the floating of the ship when the pile 3 is installed at sea.

[0079] Please see Figure 10 and Figure 12The outer wall of the movable disk 1102 is slidably connected with a plurality of guide rods 24 evenly distributed in a circle. The guide rods 24 include a horizontal part near the side of the movable disk 1102 and an inclined part integrally formed with the horizontal part. The movable disk 1102 is fixedly connected with a guide post 28 that is slidably connected to the guide rods 24. The guide post 28 is sleeved with a limiting spring 29 that abuts against the guide rods 24.

[0080] Specifically, when the pile cylinder 3 approaches the positioning plate 11, the inner wall of the pile cylinder 3 first contacts the guide rod 24. The guide rod 24 guides the pile cylinder 3, improving the efficiency of the pile cylinder 3 approaching and contacting the positioning plate 11. At the same time, when the guide rod 24 is under pressure, it squeezes the limit spring 29, making the guide rod 24 elastically connected to the moving plate 1102, reducing the rigid compression of the guide rod 24 by the pile cylinder 3, and adapting to the installation environment of the ship's hull undulation at sea.

[0081] Please see Figure 10 The movable disk 1102 is provided with a water inlet hole 1104, and the first chuck 9 and the second chuck 10 are both provided with through holes for water flow.

[0082] Specifically, seawater enters the inner cavity of the pile tube 3 through the water inlet hole 1104, which facilitates the settlement of the pile tube 3.

[0083] In light of current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Various changes made within the knowledge of those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A self-turning construction technique for offshore monopile, characterized in that, Includes the following steps: Step 1, preparation work; transport the pile stabilization platform (2) to the construction site and install it, then hoist the pile cylinder (3) onto the construction vessel (1) and transport it to the construction site; Step 2, securing the steel cable (6), includes the following sub-steps: S1, adjust the height of the positioning plate (11) on the pile stabilizing platform (2) to be the same height as the pile tube (3) on the construction vessel (1), then start the construction vessel (1) so that the bottom of the pile tube (3) at the top of the construction vessel (1) is opposite to the positioning plate (11), and finally, drop the four anchor chains around the construction vessel (1) to fix the position of the construction vessel (1). S2, fix the first chuck (9) and the second chuck (10) inside the pile tube (3) near the openings on both sides, and then pass the steel cable (6) of the construction vessel (1) through the first chuck (9) and the second chuck (10); S3, fix the end of the steel cable (6) to the center position of the positioning plate (11) on the pile stabilization platform (2); Step 3, rough positioning; start the winch (7) to wind up the steel cable (6). The steel cable (6) drives the pile cylinder (3) to slide on the construction vessel (1) and move closer to the positioning plate (11) until the tail of the pile cylinder (3) comes into contact with the positioning plate (11). Then, turn off the winch (7) and start the locking device (19) fixed on the first chuck (9) to lock the steel cable (6) to the first chuck (9). Step 4, turn the pile over; restart the winch (7), the steel cable (6) drives the pile cylinder (3) to turn over with the positioning plate (11) as the fulcrum. At the same time, start the traction mechanism (14), the traction mechanism (14) drives the sliding frame (12) to move downward, the sliding frame (12) drives the positioning plate (11) hinged to it to move downward until the pile cylinder (3) reaches the vertical state. Step 5, precise positioning; start the first clamping frame (15) and the second clamping frame (16) to clamp the pile tube (3) and squeeze and position the pile tube (3); Step 6: Release the positioning plate (11); start the traction mechanism (14) to release the sliding frame (12). The sliding frame (12) slides down along the guide rail (13). When the sliding frame (12) slides to the lower part of the guide rail (13), the positioning plate (11) moves away from the pile cylinder (3). Step 7: The pile (3) sinks to the bottom; start the winch (7) to release the steel cable (6) so that the lower end of the pile (3) comes into contact with the seabed silt layer; Step 8: Recover the steel cable (6), the first chuck (9), and the second chuck (10); Step 9: Use the hydraulic hammer installed on the construction vessel (1) to hammer the pile cylinder (3) and install it. After installation, disassemble and retrieve the pile stabilizing platform (2).

2. The offshore monopile self-turning construction technology according to claim 1, characterized in that, The positioning disk (11) includes a fixed disk (1101) hinged to the sliding frame (12), and the fixed disk (1101) is fixedly connected to a movable disk (1102) by a plurality of spring telescopic rods (1103); the outer wall of the movable disk (1102) is slidably connected to a plurality of guide rods (24) evenly distributed in a circle, and the guide rods (24) include a horizontal part near the movable disk (1102) and an inclined part integrally formed with the horizontal part; the movable disk (1102) is fixedly connected to a guide post (28) slidably connected to the guide rod (24), and the guide post (28) is sleeved with a limiting spring (29) that abuts against the guide rod (24).

3. The offshore monopile self-turning construction technology according to claim 1, characterized in that, The deck of the construction vessel (1) is fixedly connected with multiple load-bearing rollers (4) and limiting rollers (5) that are equidistantly distributed along the length of the hull. The load-bearing rollers (4) are horizontal rollers and the limiting rollers (5) are vertical rollers. The tail of the construction vessel (1) is fixedly connected with an extension frame (8). The winch (7) is fixed at the end of the extension frame (8) away from the construction vessel (1). The construction vessel (1) is also equipped with a hydraulic hammer.

4. The self-turning construction technology for a marine monopile according to claim 1, characterized in that, Both the first chuck (9) and the second chuck (10) are slidably connected to the steel cable (6) and have the same structure. The first chuck (9) includes an annular airbag (17) fixed on its outer circumference. An inflation pump (18) is fixedly connected to the inner side of the annular airbag (17). The inflation pump (18) is fixed inside the first chuck (9).

5. The offshore monopile self-turning construction technology according to claim 1, characterized in that, The locking device (19) includes a housing (1901) fixedly connected to the first chuck (9). The housing (1901) has a through cavity for the steel cable (6) to pass through. A compression plate (1902) is slidably connected in the through cavity. The compression plate (1902) is fixedly connected to the sliding end of an electric push rod (1903). The fixed end of the electric push rod (1903) is fixedly connected to the housing (1901).

6. The offshore monopile self-turning construction technology according to claim 1, characterized in that, The first chuck (9) has a guide frame (20) fixedly connected to its outer wall. The guide frame (20) includes a horizontal rod (21) fixedly connected to the outer wall of the first chuck (9). The outer end of the horizontal rod (21) is hinged to a vertical rod (22) that abuts against it perpendicularly. The upper end of the vertical rod (22) is fixedly connected to a guide ring (23).

7. The offshore monopile self-turning construction technology according to claim 1, characterized in that, The end of the steel cable (6) is fixedly connected to a plug (25), and a locking block (26) that engages with the plug (25) is fixedly connected to the center of the outer wall of the positioning disk (11). An electric control pin (27) is fixedly connected to the locking block (26), and the electric control pin (27) passes through the locking block (26) and is inserted into the plug (25).

8. The offshore monopile self-turning construction technology according to claim 1, characterized in that, The traction mechanism (14) includes a traction rope (1401) fixedly connected to the sliding frame (12) and a winding machine (1402) fixedly wound around the traction rope (1401). The guide rail (13) is J-shaped and fixedly connected to the pile stabilizing platform (2).

9. The offshore monopile self-turning construction technology according to claim 1, characterized in that, The first bracket (15) and the second bracket (16) have the same structure. The first bracket (15) includes a mirror-image arc-shaped part and a rotating mechanism that drives the arc-shaped part to rotate. The inner wall of the arc-shaped part is rotatably connected with evenly distributed balls.

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