Sludge-suctioning inserting tip based on offshore wind power jacket foundation and construction method of mud-suctioning inserting tip

Abstract

The invention relates to the technical field of offshore wind power foundation construction, and discloses an offshore wind power jacket foundation-based plug tip capable of sucking mud and a construction method thereof.The plug tip comprises a plug tip body, a mud suction pipe and an outer side sealing ring, and the interior of the plug tip body is of a hollow structure with the upper end and the lower end open; the mud suction pipe penetrates through the interior of the insertion tip main body, and the bottom end of the mud suction pipe is located in the lower end opening of the insertion tip main body; the upper end of the sludge suction pipe is suitable for being connected with an external air compressor. The outer side sealing ring is fixedly arranged on the outer side surface of the insertion tip body in a sleeving mode and located between the upper end and the lower end of the insertion tip body. The inserting tip body is suitable for being inserted into the steel pipe pile, and the peripheral side of the outer side sealing ring is suitable for abutting against the inner wall face of the steel pipe pile. According to the inserting tip capable of sucking the mud, the mud sucking function is integrated in the inserting tip structure, the mud sucking operation is synchronously carried out in the lifting process of the jacket inserting tip, and the construction efficiency of an offshore wind power jacket foundation is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power foundation construction, and in particular to a mud-absorbent plug tip based on an offshore wind power conductor frame foundation and a construction method thereof. Background Art

[0002] The foundation structure of offshore wind turbine jackets draws on the concept of offshore oil platforms and is divided into two parts: engineering piles and jackets.

[0003] The jacket structure is a spatial frame, characterized by a small rod diameter, high strength, light weight, and minimal impact from waves and currents. The applicable water depth for jackets is 10 to 50 meters. The jacket foundation structure consists of jacket piles, typically 60 to 100 meters long, hammered into the soil below the water surface with a pile hammer. The top elevation of the piles is slightly higher than the seabed by 2 to 10 meters. The jacket body is located in the water and connected to the spigot via an upper connection structure. The spigot is inserted into the pile and connected to the pile via high-strength concrete to form a single unit. The jacket foundation connection consisting of jacket, spigot, pile, and soil has the advantages of a wide range of applicable water depths and high rigidity, and is widely used in the offshore wind power sector.

[0004] Due to the long length of the jacket's tip section, and the rising mud surface inside the steel pipe pile during pile sinking, the jacket's tip section cannot be fully inserted into the steel pipe pile, affecting the quality of grouting after the jacket is installed. Therefore, dredging of the pile must be performed before the jacket is installed to ensure that the jacket leg insertion operation is not affected. If dredging is not performed promptly after pile sinking, the mud surface inside the steel pipe pile will harden, making subsequent dredging more difficult. The current underwater steel pipe pile suction dredging construction process uses a gas reverse circulation method combined with diving measurement verification, which results in low dredging efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a mud suction tip based on an offshore wind turbine conductor frame foundation to solve the problem of low mud suction and dredging efficiency in the current underwater steel pipe pile mud suction and dredging construction process.

[0006] In a first aspect, the present invention provides a mud-absorbing plug tip based on an offshore wind turbine jacket foundation, comprising:

[0007] The main body of the plug tip is a hollow structure with openings at the upper and lower ends;

[0008] A mud suction pipe is provided inside the insert tip body, and the bottom end of the mud suction pipe is located in the lower end opening of the insert tip body; the upper end of the mud suction pipe is suitable for connecting to an external air compressor;

[0009] An outer sealing ring is fixedly mounted on the outer surface of the insert tip body, and the outer sealing ring is located between the upper and lower ends of the insert tip body;

[0010] The insert tip body is suitable for being inserted into the interior of the steel pipe pile, and the outer peripheral side of the outer sealing ring is suitable for abutting against the inner wall surface of the steel pipe pile.

[0011] Beneficial effects: The traditional construction method requires separate underwater steel pipe pile suction and dredging operations before the jacket tip is installed. This method uses a gas reverse circulation method + diving measurement verification, which is inefficient.

[0012] The suction tip integrates the suction function into the tip structure, allowing for simultaneous suction during the jacket tip's lowering. During lowering, an external air compressor connected to the suction pipe remains open. As the tip descends, the silt within the pile is continuously pumped outwards, eliminating the need for additional dredging, significantly shortening the construction cycle, and significantly improving the efficiency of offshore wind turbine jacket foundation construction, enabling the entire project to be commissioned more quickly.

[0013] In an optional embodiment, the sidewalls around the bottom opening of the insert tip body are contracted inwards.

[0014] In an optional embodiment, a plurality of mud suction steel pipe fixing rods are further included, wherein the mud suction steel pipe fixing rods are fixed inside the plug tip body, and the mud suction steel pipe fixing rods fix the mud suction pipe.

[0015] Beneficial Effects: The offshore environment is complex, and factors such as wind, waves, and currents can cause the jacket to shake and shift. The suction pipe fixing rod securely secures the suction pipe within the main body of the sluice tip, effectively preventing the suction pipe from shaking, shifting, or falling off during the sluice tip sinking and sluice suction process. This ensures stable operation and suction efficiency, providing continuous support for sluice tip sinking and dredging, and preventing any impact on construction progress caused by suction pipe instability.

[0016] During installation and removal of the suction pipe, the steel pipe fixing rod provides a clear positioning and support point for construction workers. This allows them to more easily and accurately install the suction pipe into the main body of the plug and quickly secure it using the rod. During equipment maintenance, the rod also allows for easy removal and replacement of the suction pipe, enhancing ease of operation and maintenance, reducing preparation and maintenance time, and further improving construction efficiency.

[0017] In an optional embodiment, the upper end of the mud suction pipe extends out of the outside of the plug tip body through the opening of the side wall of the plug tip body, and the upper end of the mud suction pipe is fixed with an external interface.

[0018] Beneficial Effects: The upper end of the suction tube extends outside the plug body and secures the external interface, making it easy and convenient to connect external equipment (such as air compressors and suction hoses). Construction workers no longer need to navigate the narrow and complex interior of the plug. Instead, they can directly connect the suction hose to the external interface while standing on the jacket or construction vessel, greatly reducing the difficulty of operation. Furthermore, this design allows construction workers to check the connection status at any time and quickly adjust or replace the connection components if problems arise, saving significant construction time and improving overall construction efficiency.

[0019] The external interface is directly fixed to the suction pipe extending from the main plug body, eliminating internal connections and reducing the risk of leakage. Offshore wind power construction operates in a harsh environment, where seawater is corrosive. A poorly sealed connection not only compromises suction efficiency and results in incomplete sludge extraction, but can also allow seawater to backflow into the suction system and corrode equipment. Placing the external interface on the outside of the main plug body provides a more reliable seal, ensuring the suction system maintains a tight seal throughout the entire construction process, enabling stable sludge extraction and ensuring construction quality.

[0020] When the mud suction system fails and needs maintenance or inspection, maintenance personnel can directly inspect, repair and replace the external interface and the extended part of the mud suction pipe without disassembling the entire tip structure.

[0021] The upper end of the mud suction pipe extends out of the plug tip body and fixes the external interface, so that the mud suction plug tip can be better compatible with external equipment of different types and specifications.

[0022] In a second aspect, the present invention further provides a construction method for the above-mentioned suction mud plug tip based on the offshore wind turbine jacket foundation, comprising the following steps:

[0023] Connect the external air compressor to the external interface;

[0024] The insert tip body is hoisted into the interior of the steel pipe pile, and the outer sealing ring is in close contact with the inner wall of the steel pipe pile;

[0025] The external air compressor sucks the silt inside the steel pipe pile through the sludge suction pipe.

[0026] Beneficial Effects: In traditional construction, separate sludge suction and desilting steps are time-consuming. However, this construction method synchronizes sludge suction with the lowering of the plug. As the plug body is lowered into the steel pipe pile, an external air compressor simultaneously draws sludge from the steel pipe pile through the sludge suction pipe, significantly reducing construction steps and time.

[0027] By promptly absorbing silt during lowering, the tip is ensured to be fully and smoothly inserted into the steel pipe pile, avoiding issues with insufficient insertion depth due to residual silt. Furthermore, the outer sealing ring adheres closely to the inner wall of the steel pipe pile, effectively preventing silt from entering the grouting space outside the tip, ensuring a dense and uniform grouting. This strengthens the connection between the jacket and the steel pipe pile, enhancing the stability of the entire foundation structure in complex marine environments, reducing the risk of structural displacement and tilting, and extending the service life of the offshore wind turbine facility.

[0028] In an optional embodiment, during the step of hoisting the insert body into the interior of the steel pipe pile, the external air compressor is kept turned on.

[0029] Beneficial Effect: The external air compressor operates continuously, ensuring constant suction in the suction pipe. From the moment the plug tip is lowered until it is fully inserted into the steel pipe pile, the silt within the pile is continuously extracted. This effectively prevents silt accumulation from hindering the plug tip's descent, ensuring it reaches its intended position quickly and smoothly.

[0030] In an optional embodiment, in the step of hanging and placing the insert tip body into the interior of the steel pipe pile, the space between the peripheral side wall surface of the bottom opening of the insert tip body and the inner wall of the steel pipe pile accommodates part of the silt in the steel pipe pile.

[0031] In an optional embodiment, in the step of hanging the plug tip body into the interior of the steel pipe pile, the outer sealing ring prevents the silt in the space between the side wall surface of the bottom opening of the plug tip body and the inner wall of the steel pipe pile from further grouting into the space outside the plug tip.

[0032] Beneficial Effects: The outer sealing ring tightly contacts the inner wall of the steel pipe pile, forming an effective barrier. This prevents mud from entering the outer space of the plug tip, preventing contamination of the grouting area. This ensures the density and integrity of the grouting, thereby strengthening the connection between the jacket and the steel pipe pile and improving the stability and safety of the entire foundation structure.

[0033] In an optional embodiment, in the step of hanging and placing the insert tip body into the interior of the steel pipe pile, part of the silt that cannot be extracted out of the steel pipe pile is retained inside the insert tip body.

[0034] Benefits: Because the silt trapped inside the tip body is isolated from the grouting area outside the tip, it does not directly affect subsequent grouting operations. During grouting, construction workers do not need to worry about silt mixing into the grouting material and causing a decrease in grouting quality.

[0035] In an optional embodiment, after the mud suction process is completed, the external air compressor is removed at the external interface and sealing measures are taken for the external interface.

[0036] Beneficial Effects: The offshore environment is complex, with large amounts of seawater, marine organisms, and other floating objects. Removing the external air compressor and sealing the external interface can effectively prevent seawater from flowing back into the suction pipe and the internal space of the plug tip. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is a structural schematic diagram of a mud-absorbing plug tip based on an offshore wind turbine jacket foundation according to an embodiment of the present invention;

[0039] Figure 2 Schematic diagram of the construction method according to an embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 1. Tip body;

[0042] 2. Mud suction pipe;

[0043] 3. Outer sealing ring;

[0044] 4. Mud suction steel pipe fixing rod;

[0045] 5. External interface;

[0046] 6. Steel pipe piles;

[0047] 7. Grouting space. DETAILED DESCRIPTION

[0048] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0049] The foundation structure of offshore wind turbine jackets draws on the concept of offshore oil platforms and is divided into two parts: engineering piles and jackets.

[0050] The jacket structure is a spatial frame, characterized by a small diameter, high strength, light weight, and minimal impact from waves and currents. The jacket is suitable for use in water depths of 10 to 50 meters. Jacket foundation piles are typically 60 to 100 meters long and driven into the soil below the water surface using pile hammers. The pile tops are elevated slightly above the seabed by 2 to 10 meters.

[0051] The jacket body is submerged and connected to the spigot via an upper connection structure. The spigot is inserted into the engineering pile and connected to the pile via high-strength concrete, forming a single unit. This foundation connection of jacket-spigot-pile-soil offers advantages such as wide water depth compatibility and high rigidity, making it widely adopted in the offshore wind power sector.

[0052] Due to the long length of the jacket's tip section, and the rising mud surface inside the steel pipe pile during pile sinking, the jacket's tip section cannot be fully inserted into the steel pipe pile, affecting the quality of grouting after the jacket is installed. Therefore, dredging of the pile must be performed before the jacket is installed to ensure that the jacket leg insertion operation is not affected. If dredging is not performed promptly after pile sinking, the mud surface inside the steel pipe pile will harden, making subsequent dredging more difficult. The current underwater steel pipe pile suction dredging construction process uses a gas reverse circulation method combined with diving measurement verification, which results in low dredging efficiency.

[0053] To this end, this embodiment provides a mud-absorbing plug tip based on an offshore wind power conductor foundation to solve the above-mentioned problem.

[0054] The following combination Figure 1 , describing embodiments of the present invention.

[0055] According to an embodiment of the present invention, on the one hand, a mud-absorbing plug tip based on an offshore wind power conductor frame foundation is provided, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a mud-absorbing plug based on an offshore wind turbine conduit frame foundation according to this embodiment. The mud-absorbing plug based on an offshore wind turbine conduit frame foundation includes a plug body 1, a mud suction pipe 2, and an outer sealing ring 3. The plug body 1 is a hollow structure with upper and lower ends open. The mud suction pipe 2 is inserted into the plug body 1, and the bottom end of the mud suction pipe 2 is located in the lower end opening of the plug body 1. The upper end of the mud suction pipe 2 is suitable for connection to an external air compressor. The outer sealing ring 3 is fixedly mounted on the outer surface of the plug body 1 and is located between the upper and lower ends of the plug body 1. The plug body 1 is suitable for insertion into a steel pipe pile 6, and the outer peripheral side of the outer sealing ring 3 is suitable for contacting the inner wall surface of the steel pipe pile 6.

[0056] The traditional construction method requires separate underwater steel pipe pile suction and dredging operations before the jacket tip is installed. This method uses a gas reverse circulation method combined with diving measurement verification, which is inefficient.

[0057] The present sludge-absorbing plug integrates the sludge-absorbing function into the plug structure, allowing for simultaneous sludge suction during the sludge-absorbing plug's placement. During placement, an external air compressor is connected to the sludge suction pipe 2 and kept running. As the plug descends, sludge within the steel pipe pile 6 is continuously pumped outwards, eliminating the need for additional dredging, significantly shortening the construction cycle, and significantly improving the efficiency of offshore wind turbine jacket foundation construction, enabling the entire project to be commissioned more quickly.

[0058] If the plug tip cannot be fully inserted into the steel pipe pile 6, the quality of subsequent grouting will be affected, thereby threatening the stability of the entire foundation structure.

[0059] During the sinking process of this sludge-absorbing plug for an offshore wind turbine jacket foundation, the outer sealing ring 3 tightly abuts the inner wall of the steel pipe pile 6, forming an effective barrier. This prevents mud from entering the outer space at the bottom of the plug body 1, preventing it from entering the grouting space 7 outside the plug body 1. This prevents mud from contaminating the grouting area, ensuring the density and integrity of the grouting, and thus ensuring the connection strength between the jacket and the steel pipe pile 6, improving the stability and safety of the entire foundation structure.

[0060] Offshore wind power construction is complex, with factors such as wind, waves, and currents adding to the difficulty. The suction dredging plug has a simple and easy-to-use structure. Its integrated design reduces the number of underwater operations and equipment, minimizing equipment failures and safety risks during construction. In complex sea conditions, frequent underwater dredging by divers is no longer necessary, reducing the risk of casualties, improving construction reliability and safety, and enhancing the adaptability of the construction process to complex offshore environments.

[0061] In one embodiment, the sidewalls around the bottom opening of the plug tip body 1 are contracted inwards, forming a funnel-like structure.

[0062] In one embodiment, the mud suction plug tip based on the offshore wind turbine conduit foundation further includes a plurality of mud suction steel pipe fixing rods 4 , which are fixed inside the plug tip body 1 and fix the mud suction pipe 2 .

[0063] The offshore environment is complex, and factors such as wind, waves, and currents can cause the jacket to shake and shift. The suction pipe fixing rod 4 securely secures the suction pipe 2 within the tip body 1, effectively preventing it from shaking, shifting, or falling off during the tip's lowering and dredging process. This ensures the stable operation and efficiency of the suction pipe 2, ensuring continuous lowering and dredging, and preventing any instability of the suction pipe 2 from impacting construction progress.

[0064] During installation and removal of the suction pipe 2, the suction pipe fixing rod 4 provides a clear positioning and support point for construction workers. This allows them to more easily and accurately install the suction pipe 2 into the tip body 1 and quickly secure it using the suction pipe fixing rod 4. During equipment maintenance, the suction pipe fixing rod 4 also allows for easy removal and replacement of the suction pipe 2, enhancing the convenience of construction operations and maintenance, reducing preparation and maintenance time, and further improving construction efficiency.

[0065] In one embodiment, the upper end of the mud suction pipe 2 extends out of the tip body 1 through the opening on the side wall of the tip body 1 , and the upper end of the mud suction pipe 2 is fixed with an external interface 5 .

[0066] The upper end of the suction tube 2 extends outside the main body of the plug 1 and secures the external interface 5, making connection to external equipment (such as an air compressor or suction hose) easy and convenient. Construction workers no longer need to navigate the narrow and complex interior of the plug. Instead, they can directly connect the suction hose to the external interface 5 while standing on the jacket or construction vessel, significantly reducing the operational complexity. Furthermore, this design allows construction workers to readily monitor the connection status and quickly adjust or replace the connection components if any issues arise, saving significant construction time and improving overall efficiency.

[0067] The external interface 5 is directly fixed to the suction pipe 2 extending from the main plug 1, eliminating internal connections and reducing the risk of leakage. Offshore wind power construction operates in a harsh environment, where seawater is corrosive. A poorly sealed connection not only compromises suction efficiency and results in incomplete sludge extraction, but can also allow seawater to backflow into the suction system and corrode equipment. Placing the external interface 5 on the outside of the main plug 1 provides a more reliable seal, ensuring the suction system maintains a good seal throughout the entire construction process, enabling stable sludge extraction and ensuring high-quality construction.

[0068] When the mud suction system fails and needs maintenance or overhaul, maintenance personnel can directly inspect, repair and replace the external interface 5 and the extended part of the mud suction pipe 2 without disassembling the entire plug tip structure.

[0069] The upper end of the mud suction pipe 2 extends out of the tip body 1 and is fixed to the external interface 5, so that the mud suction tip can be better compatible with external equipment of different types and specifications.

[0070] The use process of the mud-absorbing plug tip based on the offshore wind turbine jacket foundation provided in this embodiment is as follows:

[0071] Pre-construction preparation: Before constructing the offshore wind turbine jacket foundation, inspect the integrity and functionality of all components of the suction tip. Verify that the tip body 1 is free of cracks, deformation, or other defects, that the outer sealing ring 3 is properly sealed, that the suction pipe 2 is free of damage or blockage, and that the suction steel pipe fixing rod 4 is securely connected. Also, prepare supporting equipment such as the external air compressor and suction hose and verify their proper function.

[0072] Connecting Equipment and Commissioning: After the steel pipe piles 6 are constructed and before the jacket tip is lowered into the mud, use the suction hose to tightly connect the external air compressor to the external port 5 at the upper end of the suction pipe 2. Once connected, start the external air compressor for commissioning and check whether the suction system is operating properly. Observe airflow through the suction pipe 2, listen for any unusual sounds, and check for leaks at the connections. If any problems are found, promptly investigate and resolve them to ensure the suction system is operating optimally.

[0073] The tip is lowered and the mud suction operation is carried out simultaneously: after the debugging is completed, the mud-absorbing tip based on the offshore wind turbine conductor frame foundation is slowly lowered to the top of the steel pipe pile 6 using a crane. During the tip hoisting process, the external air compressor is kept on. When the tip gradually approaches the steel pipe pile 6, the lowering speed and angle are controlled so that the tip is accurately aligned with the steel pipe pile 6. As the tip is inserted into the steel pipe pile 6, the outer sealing ring 3 of the tip fits tightly against the inner wall of the steel pipe pile 6 to form a seal. At this time, part of the silt in the pile enters the internal space of the tip through the opening at the bottom end of the tip body 1, and is extracted to the outside of the pile through the mud suction pipe 2 under the suction force of the air compressor; the other part of the silt enters the outer space of the bottom of the tip, is blocked by the outer sealing ring 3, and cannot enter the grouting space 7 outside the tip. During the lowering of the tip, pay close attention to the mud suction situation. If the mud suction volume is found to be abnormally reduced or blocked, adjust the position of the tip or check the mud suction system in time.

[0074] Continue to suck out mud and check after the tip is in place: After the jacket tip is lowered into place, do not turn off the external air compressor immediately. Keep it running for a while. During this time, continue to observe whether there is still mud being sucked out of the pile until it is confirmed that no mud has been sucked out.

[0075] Post-sludge suction: After the sludge suction process is completed, the sludge suction hose is removed from the external interface 5 of the sludge suction pipe 2 and a special sealing device is used to seal the external interface 5. This prevents seawater, debris, etc. from entering the sludge suction pipe 2 and the plug tip, avoiding any impact on subsequent construction.

[0076] Subsequent construction connection: After completing the mud suction operation and treatment of the mud-absorbent plug tip, the subsequent grouting, connection and fixation of the jacket and the plug tip can be carried out in accordance with the offshore wind turbine jacket foundation construction process.

[0077] According to an embodiment of the present invention, on the other hand, Figure 2As shown, a construction method is also provided for the above-mentioned suction mud plug tip based on the offshore wind power conductor frame foundation, comprising the following steps:

[0078] Connect the external air compressor to the external interface 5;

[0079] Hang the plug body 1 into the steel pipe pile 6, and make the outer sealing ring 3 fit tightly against the inner wall of the steel pipe pile 6;

[0080] The external air compressor sucks the silt inside the steel pipe pile 6 through the sludge suction pipe 2.

[0081] In traditional construction, the separate suction and dredging process takes a significant amount of time. However, this construction method synchronizes suction and lowering of the plug. As the plug body 1 is lowered into the steel pipe pile 6, an external air compressor simultaneously sucks out the silt inside the steel pipe pile 6 through the suction pipe 2, significantly reducing construction steps and time.

[0082] By promptly absorbing silt during lowering, the tip is ensured to be smoothly and completely inserted into the steel pipe pile 6, avoiding problems with insufficient insertion depth due to residual silt. Furthermore, the tight contact between the outer sealing ring 3 and the inner wall of the steel pipe pile 6 effectively prevents silt from entering the grouting space 7 outside the tip, ensuring a dense and uniform grouting. This strengthens the connection between the jacket and the steel pipe pile 6, enhances the stability of the entire foundation structure in complex marine environments, reduces the risk of structural displacement and tilting, and extends the service life of the offshore wind turbine facility.

[0083] In one embodiment, during the step of hanging and lowering the plug tip body 1 into the steel pipe pile 6 , the external air compressor is kept turned on.

[0084] The external air compressor operates continuously, ensuring that suction pipe 2 maintains constant suction. From the moment the plug tip is lowered until it is fully inserted into the steel pipe pile 6, the silt within the pile is continuously extracted. This effectively prevents silt accumulation from hindering the plug tip's descent, ensuring that the plug tip reaches its intended position quickly and smoothly.

[0085] In one embodiment, during the step of placing the insert tip body 1 into the steel pipe pile 6 , the space between the peripheral wall surface of the bottom opening of the insert tip body 1 and the inner wall of the steel pipe pile 6 accommodates part of the silt in the steel pipe pile 6 .

[0086] In one embodiment, when the plug tip body 1 is hoisted into the steel pipe pile 6 , the outer sealing ring 3 prevents the silt in the space between the side wall of the bottom opening of the plug tip body 1 and the inner wall of the steel pipe pile 6 from further grouting into the outer grout space 7 of the plug tip.

[0087] The outer sealing ring 3 tightly abuts the inner wall of the steel pipe pile 6, forming an effective barrier. This prevents mud from entering the outer space of the tip bottom, preventing it from entering the grouting space 7 outside the tip. This prevents mud from contaminating the grouting area, ensuring the density and integrity of the grouting, and thus ensuring the connection strength between the jacket and steel pipe pile 6, improving the stability and safety of the entire foundation structure.

[0088] In one embodiment, during the step of lowering the plug tip body 1 into the steel pipe pile 6 , part of the silt that cannot be extracted out of the steel pipe pile 6 remains inside the plug tip body 1 .

[0089] Since the silt retained inside the tip body 1 is isolated from the grouting area outside the tip, the silt will not directly affect the subsequent grouting operation. During the grouting construction, the construction workers do not need to worry about the silt mixing into the grouting material and causing the grouting quality to deteriorate.

[0090] In one embodiment, after the mud suction process is completed, the external air compressor is removed from the external interface 5 and sealing measures are taken for the external interface 5 .

[0091] The offshore environment is complex, with a large amount of seawater, marine organisms, and other floating objects. After removing the external air compressor, plugging the external interface 5 can effectively prevent seawater from flowing back into the sludge suction pipe 2 and the internal space of the plug tip.

[0092] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A mud-absorbing plug tip based on an offshore wind power conductor foundation, characterized in that: include: The insert tip body (1) has a hollow structure with upper and lower ends open; A mud suction pipe (2) is arranged inside the plug tip body (1), and the bottom end of the mud suction pipe (2) is located in the lower end opening of the plug tip body (1); the upper end of the mud suction pipe (2) is suitable for connecting to an external air compressor; An outer sealing ring (3) is sleeved and fixed on the outer surface of the insert tip body (1), and the outer sealing ring (3) is located between the upper and lower ends of the insert tip body (1); The insert tip body (1) is suitable for being inserted into the interior of the steel pipe pile (6), and the outer peripheral side of the outer sealing ring (3) is suitable for abutting against the inner wall surface of the steel pipe pile (6).

2. The mud-absorbing plug tip based on the offshore wind power conductor frame foundation according to claim 1 is characterized in that: The side walls around the bottom opening of the insert tip body (1) are contracted inwards.

3. The mud-absorbing plug tip based on the offshore wind power conductor frame foundation according to claim 2 is characterized in that: It also includes a plurality of mud suction steel pipe fixing rods (4), which are fixed inside the tip body (1) and fix the mud suction steel pipe fixing rods (4) to the mud suction pipe (2).

4. The mud-absorbing plug tip based on the offshore wind power conductor frame foundation according to claim 3 is characterized in that: The upper end of the mud suction pipe (2) extends out of the outside of the tip body (1) through the opening of the side wall of the tip body (1), and the upper end of the mud suction pipe (2) is fixed with an external interface (5).

5. A construction method for the suction mud plug tip based on the offshore wind power conductor frame foundation according to claim 4, characterized in that: The steps include: Connecting an external air compressor to an external interface (5); The plug tip body (1) is hoisted into the interior of the steel pipe pile (6), and the outer sealing ring (3) is in close contact with the inner wall of the steel pipe pile (6); The external air compressor sucks the silt inside the steel pipe pile (6) through the silt suction pipe (2).

6. The construction method according to claim 5, characterized in that: During the step of placing the pointed body (1) into the interior of the steel pipe pile (6), the external air compressor is kept in an on state.

7. The construction method according to claim 6, characterized in that: In the step of hanging the insert tip body (1) into the interior of the steel pipe pile (6), the space between the peripheral wall surface of the bottom opening of the insert tip body (1) and the inner wall of the steel pipe pile (6) accommodates part of the silt in the steel pipe pile (6).

8. The construction method according to claim 7, characterized in that: In the step of placing the plug tip body (1) into the interior of the steel pipe pile (6), the outer sealing ring (3) blocks the silt in the space between the peripheral wall surface of the bottom opening of the plug tip body (1) and the inner wall of the steel pipe pile (6) from further grouting into the outer grout space (7) of the plug tip.

9. The construction method according to claim 6, characterized in that: During the step of hanging the insert tip body (1) into the interior of the steel pipe pile (6), part of the silt that cannot be extracted outside the steel pipe pile (6) is retained inside the insert tip body (1).

10. The construction method according to any one of claims 5 to 9, characterized in that: After the mud suction process is completed, the external air compressor is removed at the external interface (5), and blocking measures are taken for the external interface (5).

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