Offshore wind power jacket grouting connection section modification process

Abstract

The application discloses a reconstruction process of a grouting connecting section of an offshore wind power jacket, relates to the technical field of offshore wind power foundations, and discloses a reconstruction process of a grouting connecting section of an offshore wind power jacket, which comprises the following steps: S1, cutting and separating an original grouting connecting section from a frame body of the jacket; S2, repairing and reconstructing the bottom of the frame body; S3, fixedly connecting a newly-made grouting connecting section to the bottom of the frame body; and S4, reinstalling the jacket on an engineering pile through the newly-made grouting connecting section. The newly-made grouting connecting section comprises a seat body, a sleeve, a sealing ring and a plurality of grouting devices; the sealing ring is arranged at one end of the sleeve; the grouting devices are arranged outside the sleeve; a grouting space is formed on the periphery of the engineering pile, and a plurality of through holes are formed in the seat body. The application can effectively reduce the probability of scrapping of the jacket due to position deviation after installation, thereby improving the construction efficiency and quality of the offshore wind power jacket.

Description

Technical Field

[0001] This application relates to the technical field of offshore wind power foundations, and in particular to the modification process of grouting connection sections of offshore wind power jackets. Background Technology

[0002] Offshore wind turbine foundations are underwater structures that support offshore wind turbine generators. Like a "foundation," they firmly fix the turbines to the seabed and bear the weight of the turbines as well as the enormous forces of wind and waves. Their core function is to ensure the safe and stable operation of the turbines in the complex and harsh marine environment.

[0003] Among them, the jacket wind turbine foundation is a common structural form in offshore wind turbine foundations. During its installation, it is easily affected by severe weather at sea, which makes the construction of grouting connection between the jacket and the bottom engineering pile located in the seawater more difficult. In addition, the design allowable deviation of the flatness and verticality after the jacket and the bottom engineering pile are grouted is also quite strict.

[0004] If the guide frame deviates in position after being connected to the grouting pile, resulting in flatness and verticality exceeding the design allowable deviation, then the guide frame poses a great safety hazard. Since the grouting connection section cannot be pulled out from the pile at this time, it may result in both the pile and the guide frame being scrapped. Summary of the Invention

[0005] This application provides a modification process for the grouting connection section of offshore wind turbine jacket, which can effectively reduce the probability of the jacket being scrapped due to positional deviation after installation, thereby improving the construction efficiency and quality of offshore wind turbine jackets.

[0006] This application provides a modification process for the grouting connection section of offshore wind turbine jacket, adopting the following technical solution:

[0007] The modification process for grouting connection sections of offshore wind turbine jackets is applied when there are positional deviations in the jacket after the construction of the grouting connection sections is completed. It includes the following steps:

[0008] S1. Cut and separate the original grouting connection section from the frame of the guide frame;

[0009] S2. Repair and modify the bottom of the frame;

[0010] S3. Fix the newly made grouting connection section to the bottom of the frame;

[0011] S4. Reinstall the guide frame on the engineering pile through the newly made grouting connection section;

[0012] The newly manufactured grouting connection section includes a base, a sleeve, a sealing ring, and several grouting devices;

[0013] One end of the base is fixedly connected to the bottom of the frame, and the other end is fixedly connected to the sleeve; the sleeve is used to fit with the engineering pile, and the sealing ring is located at the end of the sleeve away from the base; the grouting device is located on the outside of the sleeve and is used to grout into the space inside the sleeve.

[0014] After the base is positioned on the top of the engineering pile, the sealing ring contacts and abuts against the surface of the engineering pile, forming a grouting space on the periphery of the top of the engineering pile, and the base is provided with several through holes for the grouting space to communicate with the outside.

[0015] By adopting the above technical solution, construction personnel can effectively repair and modify the jacket structure after installation with positional deviations. While repairing the bottom of the structure, a new grouting connection section is fabricated. This ensures that the flatness and verticality of the jacket structure after reinstallation with the newly fabricated grouting connection section are within the design tolerances, effectively reducing the probability of the jacket structure being scrapped due to positional deviations after installation. This significantly improves the construction efficiency and quality of offshore wind power jacket structures. Simultaneously, after the new grouting connection section is fixedly connected to the engineering pile, a layer of concrete will form around the top of the engineering pile, enclosing the original grouting connection section. This effectively improves the connection strength between the new grouting connection section and the engineering pile while eliminating the influence of the original grouting connection section remaining inside the engineering pile. Furthermore, the sealing ring improves the grouting effect within the grouting space, thus effectively improving the quality of the grout after solidification. Additionally, it facilitates the discharge of seawater and other substances in the grouting space through the through-holes during the grout filling process, further improving the grouting effect and the quality of the solidified grout.

[0016] Optionally, the newly manufactured grouting connection section may further include several guide plates;

[0017] The guide plate is disposed at one end of the sleeve away from the seat and on the side of the sealing ring away from the seat, and the interior of several guide plates encloses to form a flared space in the direction away from the seat.

[0018] By adopting the above technical solution, the guide plate can facilitate the installation and matching of the sleeve of the newly made grouting connection section with the engineering pile. At the same time, after the sealing ring comes into contact with the surface of the engineering pile, it can improve the grouting quality of the newly made grouting connection section and avoid grout leakage.

[0019] Optionally, the grouting device includes a grouting pipe and a grouting seat;

[0020] The grouting seat is located on the outer side of the sleeve away from the seat body, and on the side of the sealing ring close to the seat body; the grouting seat has a distribution groove inside, one end of the grouting pipe is fixedly connected to the grouting seat and the other end is used for grout input, and the two ends of the distribution groove are respectively connected to the grouting space and the grouting pipe.

[0021] By adopting the above technical solution, the distribution tank can buffer the grout that is about to enter the grouting space, and make the grout that enters the grouting space more uniform and dense.

[0022] Optionally, the newly manufactured grouting connection section further includes a floating component;

[0023] The floating component is installed together with the casing outside the engineering pile, located in the grouting space, and its density is greater than that of seawater and less than that of grout. When the floating component moves to its limit position in the direction close to the base, the floating component will block multiple through holes.

[0024] By adopting the above technical solution, the floating component will move upward in the grouting space as the grout is filled, which will further facilitate the discharge of seawater and other substances in the grouting space through the through hole, while reducing the impact of seawater and grout mixing in the grouting space on the grouting effect and quality.

[0025] Optionally, before grouting in the grouting space, the floating component contacts and abuts against the sealing ring, and the distribution groove communicates with the space between the floating component and the sealing ring.

[0026] By adopting the above technical solution, the effect of the floating component in helping seawater and other substances in the grouting space to be discharged through the through hole can be further improved, and the impact of seawater and grout mixing in the grouting space on the grouting effect and quality can be further reduced.

[0027] Optionally, the newly manufactured grouting connection section further includes multiple shear keys, and the shear keys are disposed on the inner surface of the sleeve.

[0028] By adopting the above technical solution, the overall structural strength of the sleeve can be improved, and the connection strength between the newly made grouting connection section and the engineering pile can be further improved.

[0029] Optionally, the shear key has a ring-shaped structure, with its axis coinciding with the axis of the sleeve, and its end away from the sleeve has a guide surface for guiding the floating component.

[0030] By adopting the above technical solutions, the supporting force of the newly made grouting connection section on the guide frame can be improved, and the probability of the floating parts getting stuck during the movement of the grouting space can be reduced.

[0031] Optionally, the shear key has a strip-shaped structure, with its length direction parallel to the axial direction of the sleeve, and the outer side of the floating member has multiple mating grooves that slide with the shear key.

[0032] By adopting the above technical solution, the shear strength of the newly made grouting connection section in the horizontal direction can be improved, the smoothness of the floating part moving in the grouting space can be effectively improved, and the seawater and other substances in the grouting space can be effectively discharged through the through hole.

[0033] In summary, this application includes at least one of the following beneficial effects:

[0034] 1. It enables construction personnel to repair and modify the original grouting connection section when there is a positional deviation due to improper construction of the original grouting connection section after the construction of the jacket foundation. This can effectively reduce the probability of the jacket foundation being scrapped due to positional deviation after installation, thereby effectively improving the construction efficiency and quality of offshore wind power jacket foundations.

[0035] 2. It can effectively improve the grouting effect and quality, thereby effectively improving the connection strength between the newly made grouting connection section and the engineering pile, and thus effectively improving the structural strength of the bottom of the offshore wind power jacket after construction. Attached Figure Description

[0036] Figure 1 This is a cross-sectional view of the guide frame in Embodiment 1 of this application when it is fixedly connected to the engineering pile through the original grouting connection section;

[0037] Figure 2 This is a sectional view of the frame structure in Embodiment 2 of this application when it is fixedly connected to the engineering pile through a newly made grouting connection section;

[0038] Figure 3 This is a schematic diagram of the structure when the newly made grouting connection section is fixedly connected to the engineering pile in Embodiment 2 of this application;

[0039] Figure 4 This is a partial cross-sectional view of the end of the sleeve furthest from the seat in Embodiment 2 of this application;

[0040] Figure 5 This is a partial cross-sectional view of the grouting device in Embodiment 2 of this application;

[0041] Figure 6 This is a cross-sectional view of the newly manufactured grouting connection section and the engineering pile before grouting in Embodiment 3 of this application;

[0042] Figure 7 This is a cross-sectional view of the newly manufactured grouting connection section and the engineering pile after positioning and grouting in Embodiment 3 of this application;

[0043] Figure 8This is a cross-sectional view of the newly manufactured grouting connection section and the engineering pile before grouting in Embodiment 4 of this application;

[0044] Figure 9 This is a cross-sectional view of the newly manufactured grouting connection section and the engineering pile after positioning and grouting in Embodiment 4 of this application.

[0045] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Original grouting connection section; 3. Newly made grouting connection section; 31. Seat; 311. Main leg pipe; 312. Connecting plate; 3121. Through hole; 313. Reinforcing wing plate; 32. Sleeve; 321. Grouting space; 33. Sealing ring; 34. Guide plate; 35. Grouting device; 351. Grouting pipe; 352. Grouting seat; 3521. Distribution groove; 36. Floating component; 361. Sliding groove; 4. Engineering pile; 41. Groove; 5. Shear key. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1 - Appendix Figure 9 This application will be described in further detail.

[0047] Example 1:

[0048] This application discloses a construction method for grouting connection sections of offshore wind turbine jacket structures, including the following steps.

[0049] S1. Hoist the guide frame so that multiple original grouting connection sections 2 are inserted into multiple engineering piles respectively.

[0050] The jacket is transported to the vicinity of the installation area by a transport ship, and then the jacket is raised by the hoisting equipment on the transport ship. After the jacket is moved above multiple engineering piles 4, multiple original grouting connection sections 2 at the bottom of the jacket are inserted into the corresponding engineering piles 4.

[0051] The jacket structure comprises a frame 1 and multiple original grouting connection sections 2 located at the bottom of the frame 1; the engineering pile 4 is a cylindrical structure, fixedly installed on the seabed with its axis vertical and submerged in the sea; the top of the engineering pile 4 has a groove 41 for inserting the original grouting connection sections 2. In this embodiment, since the original grouting connection sections 2 are existing technology in the field, they will not be described in detail here, and are only briefly shown in the accompanying drawings; since the frame 1 of the jacket structure is existing technology in the field, it will not be described in detail here, and only its structure near the original grouting connection sections 2 is shown in the accompanying drawings.

[0052] S2, Grouting inside pile 4.

[0053] After the hoisting guide frame allows multiple original grouting connection sections 2 to be inserted into the corresponding grooves 41, grout is injected into the grooves 41 through the original grouting connection sections 2.

[0054] S3. Wait for the grout to solidify.

[0055] After the grout fills and solidifies, a fixed connection is achieved between the original grouting connection section 2 and the engineering pile 4.

[0056] S4. Check whether the positional accuracy of the guide frame after installation meets the standard.

[0057] The flatness and verticality of the jacket structure are tested using testing instruments. If the data shows that there is a positional deviation after the jacket structure is installed, the jacket structure needs to be modified and repaired.

[0058] Example 2:

[0059] Reference Figure 2 This application discloses a modification process for the grouting connection section of an offshore wind turbine jacket, which is used to repair and modify the original grouting connection section 2 when there is a positional deviation due to improper construction of the original grouting connection section 2 after the jacket is constructed according to the construction method of the grouting connection section of the offshore wind turbine jacket disclosed in Embodiment 1, so that the final positional accuracy of the offshore wind turbine jacket after installation can meet the design allowable deviation.

[0060] The specific process includes the following steps:

[0061] S1. Cut and separate the original grouting connection section 2 from the frame 1 of the guide frame.

[0062] The original grouting connection section 2 was cut and separated underwater along the pile leg cutting line on the jacket. The cut jacket frame 1 was hoisted onto the transport ship using an offshore construction crane vessel. The deck of the transport ship was to be laid with a roadbed plate in advance to distribute the weight of the jacket and avoid local stress on the deck, which would lead to insufficient deck bearing capacity. After the jacket was moved to the deck of the transport ship, each leg was fixed to the jacket frame 1 and the transport ship with four diagonal braces to prevent the jacket frame 1 from becoming unstable and overturning during transportation.

[0063] The transport ship transported the jacket frame 1 to the processing base dock for mooring, and the jacket was lifted ashore as a whole.

[0064] In this embodiment, it is preferable to cut and separate the original grouting connection section 2 from the frame 1 of the guide frame, and then cut off the part of the original grouting connection section 2 located at the top of the engineering pile 4, so as to facilitate the subsequent reinstallation of the guide frame on the engineering pile 4.

[0065] S2. Repair and modify the bottom of frame 1.

[0066] (1) Cut the original main leg tube at the bottom of frame 1.

[0067] To prevent the overall instability of the jacket frame after the original main leg tubes are cut off, four steel pipes are used to support and temporarily fix the uncut parts of the original main leg tubes to the saddle before the original main leg tubes are cut off. The round tubes are laid out and cut into intersecting shapes at the welding position between the round tubes and the jacket frame to increase the amount of welding between the round tubes and the original main leg tubes.

[0068] Based on the actual cutting situation of the tip section, determine the location to be cut and mark the cutting position. During the cutting process, check whether the machine is off-track, and adjust it in time if the cutting track shifts.

[0069] Install the magnetic semi-automatic cutting machine, adjust the cutting angle, and use semi-automatic cutting technology to create a bevel. The bevel is a single bevel on the outside, and the bevel size is determined according to the welding process.

[0070] The bevel must be ground with a grinding wheel to remove rust, oil, scale, and other debris from the surface of the bevel and within a 30mm radius.

[0071] (2) Transfer the newly made pipe section to the bottom of the saddle, weld 4 temporary lifting lugs on the outer wall of the newly made pipe section, and use a hand hoist to pull the newly made pipe section to the bottom of the frame 1 of the guide frame.

[0072] For newly manufactured pipe sections of the jacket and the adjacent pipe sections of the jacket assembly, the two straight welds should be staggered by more than 90°. If the misalignment of the pipe section splicing exceeds the standard, a transverse jack should be used for fine adjustment. After the alignment is adjusted, the two pipe sections should be spot welded to fix them. After the misalignment of the pipe section splicing weld and the straightness of the pipe section are qualified, the weld should be circumferentially welded.

[0073] S3. Fix the newly made grouting connection section 3 to the bottom of the frame 1.

[0074] (1) In the general assembly area, according to the actual root opening size of the offshore jacket foundation pile 4, mark the positioning line of the newly made grouting connection section 3 on the ground.

[0075] (2) Use a crane to place the transport saddle of the jacket according to the ground layout line, and adjust the horizontal position and top elevation of the transport saddle.

[0076] (3) Transfer the newly made grouting connection section 3 to the assembly area and hoist it onto the corresponding transport saddle. Attach reflective sheets to the outside of the top port pipe section of the newly made grouting connection section 3 to facilitate measurement and position adjustment by the total station, ensuring that the relative positions and top elevation differences of the three newly made grouting connection sections 3 meet the requirements.

[0077] (4) Welded stiffeners are used to reinforce the outer side of the lower pipe section of the newly made grouting connection section 3 where it contacts the top of the transport saddle to ensure the stability of the overall assembly and transportation process.

[0078] (5) A temporary welding platform for overall hoisting is set up on the top of the newly made grouting connection section 3, and guide blocks are installed on the top of the newly made grouting connection section 3 to facilitate the overall hoisting and welding of the guide frame.

[0079] (6) Cut off the circular pipe connecting the guide frame and the saddle, lift the guide frame as a whole, and hoist the guide frame and the newly made grouting connection section 3 together.

[0080] S4. The guide frame is reinstalled on the engineering pile 4 through the newly made grouting connection section 3.

[0081] Similarly, the repaired and modified jacket is transported to the vicinity of the engineering pile 4 by a transport ship, and then the jacket is hoisted and installed on the engineering pile 4 through multiple newly made grouting connection sections 3. Then, the jacket is grouted and fixed to achieve the reinstallation of the jacket. At this time, the flatness and verticality of the jacket after installation are within the design allowable deviation.

[0082] Reference Figure 2 and Figure 3 Specifically, the newly manufactured grouting connection section 3 includes a seat 31, a sleeve 32, a sealing ring 33, several guide plates 34, and several grouting devices 35.

[0083] The base 31 is fixedly installed at the bottom of the frame 1, and includes a main leg tube 311, a connecting plate 312, and multiple reinforcing wing plates 313. In this embodiment, the main leg tube 311 is preferably cylindrical, the connecting plate 312 is preferably circular, and the reinforcing wing plates 313 are preferably trapezoidal.

[0084] One end of the main leg tube 311 along its axial direction is fixedly connected to the bottom of the frame 1, and the other end along its axial direction is fixedly connected to the connecting plate 312, with the axis of the main leg tube 311 coinciding with the axis of the connecting plate 312. The radial dimension of the connecting plate 312 is larger than the radial dimension of the main leg tube 311, and an annular plate-like structure is fixedly installed on the outer side of the main leg tube 311. Multiple reinforcing wing plates 313 are installed on the outer side of the main leg tube 311 and located between the plate-like structure and the connecting plate 312. The multiple reinforcing wing plates 313 are arranged in a circular array around the axis of the main leg tube 311, and each reinforcing wing plate 313 is fixedly connected to the connecting plate 312, the main leg tube 311, and the plate-like structure on the main leg tube 311. In this embodiment, it is preferable that the main leg tube 311, the connecting plate 312, and the reinforcing wing plates 313 are all fixedly connected by welding.

[0085] The sleeve 32 has a cylindrical structure, with a radial dimension no greater than that of the connecting plate 312 but greater than that of the main leg tube 311. One end of the sleeve 32 is fixedly connected to the side of the connecting plate 312 away from the main leg tube 311, and its axis coincides with the axis of the connecting plate 312. In this embodiment, the sleeve 32 and the seat 31 are preferably fixedly connected by welding.

[0086] Reference Figure 2 and Figure 4 The guide plate 34 is fixedly installed at the end of the sleeve 32 away from the base 31, and is used to guide the top of the engineering pile 4 into the space inside the sleeve 32. In this embodiment, the newly made grouting connection section 3 preferably includes four guide plates 34. The four guide plates are arranged in a circular array on the sleeve 32 with the axis of the sleeve 32 as the axis, and the space enclosed by the four guide plates 34 is flared in the direction away from the base 31; and preferably the guide plate 34 is detachably connected to the sleeve 32 by multiple bolts and nuts, and the detachable structure is omitted in the figure.

[0087] The sealing ring 33 has an overall annular structure and a certain degree of elasticity. It is installed inside the sleeve 32 and located at the end of the sleeve 32 closest to the guide plate 34, with its axis coinciding with the axis of the sleeve 32. In this embodiment, the sealing ring 33 is preferably made of rubber material, possessing a certain elastic deformation capability, and its normal inner diameter is smaller than the radial dimension of the engineering pile 4. Preferably, the sealing ring 33 is detachably connected to the sleeve 32 via multiple bolts and nuts.

[0088] Reference Figure 3 and Figure 5 The grouting device 35 is installed on the outside of the sleeve 32 and is used to inject grout into the space inside the sleeve 32. It includes a grouting pipe 351 and a grouting seat 352.

[0089] The grouting seat 352 is integrally formed with the sleeve 32 and is located on the side of the sealing ring 33 near the seat body 31. The interior of the grouting seat 352 has a distribution groove 3521 for uniformly buffering the grout that is about to enter the sleeve 32. One end of the distribution groove 3521 communicates with the space inside the sleeve 32. One end of the grouting pipe 351 is fixedly connected to the grouting seat 352 and connected to the other end of the distribution groove 3521. The other end of the grouting pipe 351 extends above the sea surface to transport the grout into the sleeve. In this embodiment, the grouting seat 352 is preferably annular and surrounds the outside of the sleeve 32. Its axis coincides with the axis of the sleeve 32. Multiple openings are distributed in a circular array between the distribution groove 3521 and the grouting space 321. Preferably, the newly manufactured grouting connection section 3 includes two grouting devices 35 to improve grouting efficiency. The height positions of the communication points between the distribution groove 3521 and the grouting space 321 of the two grouting devices 35 are different.

[0090] To improve the connection strength after the newly grouted connecting section 3 is fixedly connected to the engineering pile 4, it is preferable that multiple shear keys 5 are fixedly installed on the inner surface of the sleeve 32 and the outer surface of the top of the engineering pile 4. In this embodiment, the shear keys 5 are preferably ring-shaped structures, and the axes of the multiple shear keys 5 on the sleeve 32 coincide with the axis of the sleeve 32 and are evenly distributed along the axial direction of the sleeve 32. The axes of the multiple shear keys 5 on the engineering pile 4 coincide with the axis of the engineering pile 4 and are evenly distributed along the axial direction of the engineering pile 4.

[0091] During the installation of the jacket, the jacket will be transported by a transport ship to the vicinity of the location of the engineering pile 4. Then, the crane on the transport ship will control the jacket to be hoisted and positioned on the corresponding multiple engineering piles 4, so that the multiple engineering piles 4 enter the internal space of the multiple sleeves 32 respectively, and the top of the engineering pile 4 contacts and abuts against the connecting plate 312 of the corresponding base 31.

[0092] Reference Figure 2 and Figure 3 During the hoisting and positioning of the jacket, the top of the engineering pile 4 will first enter the space inside the sleeve 32 under the guidance of the guide plate 34, and then contact the sealing ring 33 to drive the sealing ring 33 to undergo elastic deformation while maintaining the inner side in contact with the outer side of the engineering pile 4, until the top of the engineering pile 4 contacts and abuts the seat 31. At this time, the axis of the engineering pile 4 and the axis of the sleeve 32 tend to be highly coincident. Above the sealing ring 33, a grouting space 321 for grouting and filling is formed between the sleeve 32 and the engineering pile 4. One end of the distribution groove 3521 is connected to the grouting space 321 near the bottom. The multiple shear keys 5 on the sleeve 32 and the multiple shear keys 5 on the engineering pile 4 are all located in the grouting space 321.

[0093] The connecting plate 312 has multiple through holes 3121 that allow the grouting space 321 to communicate with the outside, so that after the grout enters the grouting space 321, it can drive the seawater and other substances that were originally in the grouting space 321 to leave the grouting space 321 through the through holes 3121.

[0094] After the jacket is hoisted and positioned, grout is injected into the grouting space 321 through the grouting device 35 until the grout fills the grouting space 321. After the grout solidifies, the fixed connection between the newly made grouting connection section 3 and the engineering pile 4 is achieved. At this time, the solidified grout will form a thickened layer on the outer side of the top of the engineering pile 4, which can effectively improve the connection strength between the newly made grouting connection section 3 and the engineering pile 4 and the structural strength of the connection.

[0095] Example 3:

[0096] Reference Figure 6 and Figure 7To improve the grouting efficiency and effect of the grouting device 35 in the grouting space 321, it is preferable that the newly manufactured grouting connection section 3 also includes a floating member 36.

[0097] The floating component 36 has an overall ring structure. Its density is greater than that of seawater but less than that of slurry. Its outer diameter is smaller than that of the inner diameter of the casing 32 and its inner diameter is larger than that of the radial dimension of the engineering pile 4.

[0098] Before the newly manufactured grouting connection section 3 is installed and positioned on the engineering pile 4, the floating component 36 is installed inside the sleeve 32, located on the side of the sealing ring 33 near the seat 31, and contacts and abuts against the sealing ring 33 under its own weight. When the newly manufactured grouting connection section 3 is installed and positioned on the engineering pile 4, the floating component 36 remains in contact and abuts against the sealing ring 33. At this time, a grouting space 321 is formed between the floating component 36 and the sealing ring 33 to facilitate the entry of grout, and the end of the distribution groove 3521 away from the grouting pipe 351 communicates with this space. In this embodiment, it is preferable that two grouting devices 35 are symmetrically distributed on the sleeve 32.

[0099] Each shear key 5 has a guide surface at one end near the grouting space 321. As the floating component 36 moves towards the base 31 during the grout filling process, if it contacts the guide surface, it will be guided to pass through the space between the multiple shear keys 5 on the sleeve 32 and the multiple shear keys 5 on the engineering pile 4, reducing the probability of the floating component 36 getting stuck in the grouting space 321. In this embodiment, the guide surface is preferably an arc surface.

[0100] When the grout fills the grouting space 321, the floating part 36 contacts and abuts against the connecting plate 312 in the grouting space 321, and can cover multiple through holes 3121 at the same time, effectively preventing the grout from flowing out through the through holes 3121, and effectively preventing seawater and other substances from entering the grouting space 321 through the through holes 3121, thereby improving the grouting effect and accelerating the efficiency and effect of grout solidification.

[0101] The implementation principle of the modification process for the grouting connection section of the offshore wind turbine jacket in this application embodiment is as follows:

[0102] During the process of grouting the grouting space 321 through the grouting device 35, the grout first enters the space formed between the floating part 36 and the sealing ring 33. As the grout is grouted, the seawater and other substances that were originally located in the grouting space 321 will be discharged through the through hole 3121. At the same time, the floating part 36 will move upward with the grouting, making the grout more uniform in the grouting space 321 and effectively reducing the impact of seawater on the grout filling of the grouting space 321.

[0103] When the grouting space 321 is filled with grout, the floating component 36 blocks multiple through holes 3121, reducing the probability of grout outflow and seawater inflow, which helps to improve the efficiency and effect of grout solidification.

[0104] Example 4:

[0105] Reference Figure 8 and Figure 9 The difference between this embodiment and embodiment 2 lies in the shear key 5 and the floating component 36.

[0106] The shear key 5 has a strip-shaped structure, and multiple shear keys 5 are fixedly installed only on the inner side of the sleeve 32; the shear keys 5 on the sleeve 32 extend along the axial direction of the sleeve 32, and multiple shear keys 5 are distributed in a circular array on the sleeve 32 with the axial direction of the sleeve 32 as the axis.

[0107] The outer diameter of the floating component 36 is equal to the inner diameter of the sleeve 32, and the inner diameter of the floating component 36 is equal to the radial dimension of the engineering pile 4. Furthermore, the outer and inner sides of the floating component 36 are provided with mating grooves that slide with the shear key 5.

[0108] At this time, during the installation and positioning of the newly made grouting connection section 3 on the engineering pile 4, the floating part 36 can help the newly made grouting connection section 3 to be accurately positioned on the engineering pile 4 through its sleeve cooperation with the engineering pile 4. In this process, the space between the floating part 36 and the sealing ring 33 can effectively prevent seawater from entering, further facilitating the grouting of the grout into the grouting space 321.

[0109] During the grouting process, multiple shear keys 5 can guide the floating component 36 to move towards the base 31 as the grout is poured. At the same time, it can effectively separate marine materials originally located in the grouting space 321 from the grout entering the grouting space 321, further reducing the impact of seawater on the uniformity of the grout.

[0110] When the floating component 36 moves towards the base 31 and there is only a certain gap between it and the connecting plate 312, the floating component 36 and multiple shear keys 5 separate and release the sliding fit. At this time, the gas, seawater and other substances located below the floating component 36 will be discharged through multiple sliding grooves 361 and multiple through holes 3121. Finally, the floating component 36 will seal the multiple through holes 3121 at the same time, completing the grouting.

[0111] The implementation principle of the modification process for the grouting connection section of the offshore wind turbine jacket in this application embodiment is as follows:

[0112] During the process of grouting the grouting space 321 through the grouting device 35, the grout first enters the space formed between the floating part 36 and the sealing ring 33. As the grout is grouted, the seawater and other substances originally located in the grouting space 321 will be discharged through the through hole 3121. At the same time, the floating part 36 will move upward under the guidance of multiple shear keys 5 as the grout is grouted. During the process of the grout being uniformly filled in the grouting space 321, the seawater and other substances are effectively separated from it, thereby further reducing the impact of seawater on the grout filling of the grouting space 321.

[0113] Before the grout is about to fill the grouting space 321, the gas, seawater and other substances in the grouting space 321 will be discharged through multiple sliding grooves 361 and multiple through holes 3121.

[0114] Subsequently, as grouting continues, the floating component 36 simultaneously seals multiple through holes 3121, reducing the probability of grout outflow and seawater inflow, which helps to improve the efficiency and effectiveness of grout solidification.

[0115] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A modification process for grouting connection sections of offshore wind turbine jacket structures, characterized in that, When there is a positional deviation in the jacket after the construction of the grouting connection section of the offshore wind turbine jacket is completed, the following steps are included: S1. Cut and separate the original grouting connection section (2) from the frame (1) of the guide frame; S2. Repair and modify the bottom of the frame (1); S3. Fix the newly made grouting connection section (3) to the bottom of the frame (1); S4. The guide frame is reinstalled on the engineering pile (4) through the newly made grouting connection section (3); The newly made grouting connection section (3) includes a seat (31), a sleeve (32), a sealing ring (33), and several grouting devices (35). One end of the base (31) is fixedly connected to the bottom of the frame (1), and the other end is fixedly connected to the sleeve (32); the sleeve (32) is used to fit with the engineering pile (4), and the sealing ring (33) is located at the end of the sleeve (32) away from the base (31); the grouting device (35) is located on the outside of the sleeve (32) and is used to grout into the space inside the sleeve (32); After the base (31) is positioned on the top of the engineering pile (4), the sealing ring (33) contacts and abuts against the surface of the engineering pile (4), forming a grouting space (321) on the periphery of the top of the engineering pile (4), and the base (31) is provided with a plurality of through holes (3121) for the grouting space (321) to communicate with the outside.

2. The modification process for the grouting connection section of the offshore wind turbine jacket as described in claim 1, characterized in that, The newly made grouting connection section (3) also includes several guide plates (34); The guide plate (34) is disposed at one end of the sleeve (32) away from the seat (31) and on the side of the sealing ring (33) away from the seat (31), and the interior of a plurality of guide plates (34) encloses to form a space that is flared out in the direction away from the seat (31).

3. The modification process for the grouting connection section of the offshore wind turbine jacket as described in claim 1, characterized in that, The grouting device (35) includes a grouting pipe (351) and a grouting seat (352). The grouting seat (352) is located on the outer side of the sleeve (32) away from the seat body (31) and on the side of the sealing ring (33) close to the seat body (31); the grouting seat (352) has a distribution groove (3521) inside, one end of the grouting pipe (351) is fixedly connected to the grouting seat (352) and the other end is used for grout input, and the two ends of the distribution groove (3521) are respectively connected to the grouting space (321) and the grouting pipe (351).

4. The modification process for the grouting connection section of the offshore wind turbine jacket as described in claim 3, characterized in that, The newly manufactured grouting connection section (3) also includes a floating component (36); The floating component (36) is installed together with the sleeve (32) outside the engineering pile (4), located in the grouting space (321), and its density is greater than that of seawater and less than that of grout; when the floating component (36) moves to the limit position in the direction close to the base (31), the floating component (36) blocks multiple through holes (3121).

5. The modification process for the grouting connection section of the offshore wind turbine jacket as described in claim 4, characterized in that, Before the grouting device (35) grouts in the grouting space (321), the floating part (36) contacts and abuts against the sealing ring (33), and the distribution groove (3521) communicates with the space between the floating part (36) and the sealing ring (33).

6. The modification process for the grouting connection section of the offshore wind turbine jacket as described in claim 4, characterized in that, The newly made grouting connection section (3) also includes a plurality of shear keys (5), and the shear keys (5) are disposed on the inner surface of the sleeve (32).

7. The modification process for the grouting connection section of the offshore wind turbine jacket as described in claim 6, characterized in that, The shear key (5) has a ring-shaped structure, its axis coincides with the axis of the sleeve (32), and its end away from the sleeve (32) has a guide surface for guiding the floating member (36) through.

8. The modification process for the grouting connection section of the offshore wind turbine jacket as described in claim 7, characterized in that, The shear key (5) has a strip-shaped structure, and its length direction is parallel to the axis direction of the sleeve (32). The outer side of the floating part (36) is provided with multiple mating grooves that slide with the shear key (5).

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