Transformation process for grouting connection section of offshore wind power jacket

Abstract

The invention discloses a transformation process for a grouting connection section of an offshore wind power jacket, and relates to the technical field of offshore wind power foundations, the transformation process for the grouting connection section of the offshore wind power jacket comprises the following steps: S1, cutting and separating an original grouting connection section from a jacket body of the jacket; s2, the bottom of the frame body is repaired and transformed; s3, a newly-manufactured grouting connection section is fixedly connected to the bottom of the frame body; s4, the jacket is reinstalled on the engineering pile through the newly-manufactured grouting connection section; the new grouting connection 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 device is arranged on the outer side of the sleeve; a grouting space is formed on the peripheral side of the engineering pile, and a plurality of through holes are formed in the base body. The probability that the jacket is scrapped due to position deviation after being installed can be effectively reduced, and therefore the construction efficiency and quality of the offshore wind power jacket can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of offshore wind power foundations, and in particular to a modification process for a grouting connection section of an offshore wind power conductor frame. Background Art

[0002] The offshore wind power foundation is an underwater structure that supports offshore wind turbines. It acts like a "foundation" to firmly fix the wind turbines on the seabed and withstand the weight of the wind turbines and the huge force of wind and waves. Its core function is to ensure the safe and stable operation of wind turbines in complex and harsh marine environments.

[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 it difficult to align the jacket with the bottom engineering piles located in the seawater and then connect them by grouting. In addition, the design allowable deviation of the flatness and verticality of the jacket and the bottom engineering piles after grouting is also relatively strict.

[0004] If there is a position deviation after the jacket is grouted and connected to the engineering pile, resulting in flatness and verticality exceeding the design allowable deviation, the jacket will pose a great safety hazard. Since the grouted connection section cannot be pulled out from the engineering pile at this time, both the engineering pile and the jacket may be scrapped. Summary of the Invention

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

[0006] This application provides a modification process for the grouting connection section of an offshore wind turbine jacket, using the following technical solutions: The modification process of the offshore wind turbine jacket grouting connection section is applied when the jacket has position deviation after the construction of the offshore wind turbine jacket grouting connection section is completed, and includes the following steps: S1, cutting and separating the original grouting connection section from the jacket body; S2. Repairing and renovating the bottom of the frame; S3, fixing the newly made grouting connection section to the bottom of the frame; S4, reinstalling the jacket on the engineering pile through the newly made grouting connection section; The newly made grouting connection section includes a seat body, a sleeve, a sealing ring and several grouting devices; One end of the base is fixedly connected to the bottom of the frame, and the other end is fixedly connected to the casing; the casing is used to fit with the engineering pile, and the sealing ring is provided at the end of the casing away from the base; the grouting device is provided on the outside of the casing and is used to grout the space inside the casing; After the seat is positioned on the top of the engineering pile, the sealing ring contacts and abuts against the surface of the engineering pile to form a grouting space around the top of the engineering pile, and a plurality of through holes are opened on the seat for the grouting space to communicate with the outside world.

[0007] By adopting the above technical solution, it is convenient for construction personnel to effectively repair and modify the jacket after it is installed in a state with position deviation. While repairing the bottom of the jacket, a new grouting connection section is made at the same time. The flatness and verticality of the jacket after reinstallation through the newly made grouting connection section are within the design allowable deviation, thereby effectively reducing the probability of the jacket being scrapped due to position deviation after installation, thereby effectively improving the construction efficiency and quality of the offshore wind power jacket. At the same time, after the newly made grouting connection section is fixedly connected to the engineering pile, a layer of concrete will be formed around the top of the engineering pile, and at the same time, it can surround the original grouting connection section, effectively improving the connection strength between the newly made grouting connection section and the engineering pile while eliminating the impact of the original grouting connection section remaining in the engineering pile. In addition, the sealing ring can improve the grouting effect in the grouting space, thereby effectively improving the quality of the grouting after solidification. At the same time, it can facilitate the discharge of seawater and other substances in the grouting space through the through hole during the process of the grouting space being filled with grouting, thereby further improving the grouting effect and the quality of the grouting after solidification.

[0008] Optionally, the newly made grouting connection section further includes a plurality of guide plates; The guide plate is arranged at one end of the sleeve away from the seat body and located at a side of the sealing ring away from the seat body, and the interiors of the plurality of guide plates are enclosed to form a space that expands in a direction away from the seat body.

[0009] By adopting the above technical solution, the guide plate can facilitate the sleeve fitting of the newly made grouting connection section with the engineering pile. At the same time, after the sealing ring contacts the surface of the engineering pile, the grouting quality of the newly made grouting connection section can be improved to avoid leakage.

[0010] Optionally, the grouting device includes a grouting pipe and a grouting seat; The grouting seat is arranged on the outside of the sleeve away from one end of the seat body, and is located on the side of the sealing ring close to the seat body; a distribution groove is opened inside the grouting seat, one end of the grouting pipe is fixedly connected to the grouting seat and the other end is used for slurry input, and the two ends of the distribution groove are respectively connected to the grouting space and the grouting pipe.

[0011] By adopting the above technical solution, the distribution groove can play a buffering effect for the slurry that is about to enter the grouting space, and can make the slurry entering the grouting space more uniform and dense.

[0012] Optionally, the newly made grouting connection section further includes a floating member; The floating member is installed together with the casing outside the engineering pile, is located in the grouting space, and has a density greater than seawater and less than slurry; when the floating member moves to the extreme position toward the base body, the floating member blocks the multiple through holes.

[0013] By adopting the above technical solution, the floating part will move upward in the grouting space as the slurry is filled, thereby further facilitating the discharge of seawater and other substances in the grouting space through the through hole, while reducing the impact of the mixing of seawater and slurry in the grouting space on the grouting effect and quality.

[0014] Optionally, before the grouting device grouts in the grouting space, the floating member contacts and abuts against the sealing ring, and the distribution groove is communicated with the space between the floating member and the sealing ring.

[0015] By adopting the above technical solution, the effect of the floating member in helping seawater and other substances in the grouting space to be discharged through the through hole can be further improved, and at the same time, the impact of the mixing of seawater and slurry in the grouting space on the grouting effect and quality can be further reduced.

[0016] Optionally, the newly made grouting connection section further includes a plurality of shear keys, and the shear keys are arranged on the inner surface of the casing.

[0017] 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.

[0018] Optionally, the shear key is an annular structure, the axis of which coincides with the axis of the sleeve, and the end away from the sleeve has a guide surface for guiding the floating member to pass through.

[0019] By adopting the above technical solution, the supporting force of the newly-made grouting connection section on the jacket can be improved, and the probability of the floating member getting stuck during the movement in the grouting space can be reduced.

[0020] Optionally, the shear key is in a strip-shaped structure, the length direction of which is parallel to the axial direction of the sleeve, and a plurality of matching grooves for slidingly matching with the shear key are provided on the outer side of the floating member.

[0021] By adopting the above technical solution, the shear resistance of the newly made grouting connection section in the horizontal direction can be improved, while the smoothness of the movement of the floating part in the grouting space can be effectively improved, and the seawater and other substances in the grouting space can be effectively ensured to be discharged through the through hole.

[0022] In summary, this application has at least one of the following beneficial effects: 1. It can facilitate construction workers to repair and renovate the original grouting connection section of the jacket when there is position deviation due to improper construction of the original grouting connection section. This can effectively reduce the probability of the jacket being scrapped due to position deviation after installation, and thus effectively improve the construction efficiency and quality of the offshore wind turbine jacket. 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 then effectively improving the structural strength of the bottom of the offshore wind turbine jacket after construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional view of the jacket frame in Example 1 of the present application when it is fixedly connected to the engineering pile through the original grouting connection section; Figure 2 This is a cross-sectional view of the frame in Example 2 of the present application when it is fixedly connected to the engineering pile through the newly made grouting connection section; Figure 3 This is a schematic structural diagram of a newly made grouting connection section fixedly connected to an engineering pile in Example 2 of the present application; Figure 4 This is a partial cross-sectional view of the end of the sleeve away from the seat body in Example 2 of the present application; Figure 5 is a partial cross-sectional view of the grouting device in Example 2 of the present application; Figure 6 This is a cross-sectional view of the newly made grouting connection section and the engineering pile before positioning grouting in Example 3 of the present application; Figure 7 This is a cross-sectional view of the newly made grouting connection section and the engineering pile after positioning grouting in Example 3 of the present application; Figure 8 This is a cross-sectional view of the newly made grouting connection section and the engineering pile before positioning grouting in Example 4 of the present application; Figure 9 It is a cross-sectional view of the newly made grouting connection section and the engineering pile after positioning grouting in Example 4 of the present application.

[0024] Explanation of the accompanying reference numerals: 1. frame; 2. original grouting connection section; 3. new grouting connection section; 31. seat; 311. main leg pipe; 312. connecting plate; 3121. through hole; 313. reinforcing wing plate; 32. casing; 321. grouting space; 33. sealing ring; 34. guide plate; 35. grouting device; 351. grouting pipe; 352. grouting seat; 3521. distribution groove; 36. floating part; 361. sliding groove; 4. engineering pile; 41. groove; 5. shear key. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 -Attached Figure 9 This application is described in further detail.

[0026] Example 1: The embodiment of the present application discloses a construction method for a grouting connection section of an offshore wind turbine jacket, which includes the following steps.

[0027] S1. Hoist the jacket so that the multiple original grouting connection sections 2 are respectively inserted into the multiple engineering piles.

[0028] The jacket is transported to the vicinity of the installation area by a transport ship, and then the jacket is lifted by the lifting equipment on the transport ship. After the jacket is moved above multiple engineering piles 4, the multiple original grouting connection sections 2 at the bottom of the jacket are controlled to be inserted into the corresponding engineering piles 4.

[0029] The jacket structure comprises a frame 1 and multiple pre-grouted connection sections 2 located at the bottom of the frame 1. The engineering piles 4 are cylindrical in structure, fixed to the seabed with their axes vertical and submerged in the sea. The tops of the engineering piles 4 are provided with recesses 41 for the pre-grouted connection sections 2. In this embodiment, since the pre-grouted connection sections 2 are conventional in the art, they will not be described in detail here, and will be briefly illustrated in the accompanying drawings. Since the jacket structure 1 is conventional in the art, it will not be described in detail here, and the accompanying drawings only show the structure near the pre-grouted connection sections 2.

[0030] S2. Grouting inside the engineering pile 4.

[0031] After the jacket is hoisted and multiple original grouting connection sections 2 are inserted into the corresponding grooves 41 , grout is poured into the grooves 41 through the built-in original grouting connection sections 2 .

[0032] S3. Wait for the grout to solidify.

[0033] After the grouting material is filled and solidified, a fixed connection between the original grouting connection section 2 and the engineering pile 4 is achieved.

[0034] S4. Check whether the position accuracy of the jacket after installation meets the standards.

[0035] The flatness, verticality and other data of the jacket after installation are tested by testing instruments. If the data shows that there is a position deviation after the jacket is installed, the jacket needs to be modified and repaired.

[0036] Example 2: Reference Figure 2 The embodiment of the present 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 position 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 an offshore wind turbine jacket disclosed in Example 1, so that the position accuracy of the final offshore wind turbine jacket after installation can meet the design allowable deviation.

[0037] The specific process includes the following steps: S1. Cut and separate the original grouting connection section 2 from the jacket body 1.

[0038] The original grouting connection section 2 is cut and separated underwater along the leg cutting line on the jacket, and the cut jacket frame 1 is hoisted onto the transport ship by an offshore construction crane. The roadbed plate to be laid in advance on the deck of the transport ship is used to share the weight of the jacket to avoid local stress on the deck causing insufficient bearing capacity of the deck surface. After the jacket is adjusted to the deck surface of the transport ship, four diagonal braces are used on each leg to fix the jacket frame 1 and the transport ship to prevent the jacket frame 1 from becoming unstable and overturning during transportation.

[0039] The transport vessel transports the jacket frame 1 to the processing base wharf and mooring it sideways, and the jacket is hoisted ashore as a whole.

[0040] In this embodiment, after the original grouting connection section 2 is cut and separated from the jacket frame body 1, the portion of the original grouting connection section 2 located on the top of the engineering pile 4 is also cut off to facilitate the subsequent reinstallation of the jacket on the engineering pile 4.

[0041] S2. Repair and renovate the bottom of the frame 1.

[0042] (1) Cut the original main leg tube at the bottom of the frame 1.

[0043] In order to prevent the overall instability of the jacket after the original main leg pipe is cut off, four steel pipes are used to support the uncut part of the original main leg pipe and weld it to the saddle for temporary fixation before the original main leg pipe is cut off. The round pipe is cut into an intersecting form at the welding position of the round pipe and the jacket to increase the welding amount between the round pipe and the original main leg pipe.

[0044] According to 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 running off and make timely adjustments if the cutting track shifts.

[0045] Install the magnetic semi-automatic cutting machine, adjust the cutting angle, and use semi-automatic cutting technology to open the groove. The cutting form is an outer single groove, and the groove size is determined according to the welding process.

[0046] The processed groove must be polished with a grinding wheel to remove rust, oil, oxide scale, debris, etc. on the surface of the groove and within 30mm of it.

[0047] (2) Transfer the new pipe section to the bottom of the saddle, weld four temporary lifting lugs on the outer wall of the new pipe section, and use a hand hoist to pull the new pipe section to the bottom of the frame 1 of the jacket.

[0048] The two straight welds of the newly made pipe sections of the jacket and the adjacent pipe sections of the jacket assembly are staggered by more than 90°. If the local misalignment of the pipe section splicing exceeds the standard, use a transverse jack to make fine adjustments. After adjusting the alignment, the two pipe sections are spot welded and fixed. After the misalignment of the pipe section splicing welds and the straightness of the pipe section are tested and qualified, the welds are circumferentially welded.

[0049] S3. Fix the newly made grouting connection section 3 to the bottom of the frame 1.

[0050] (1) In the general assembly area, according to the actual root size of the offshore jacket engineering pile 4, mark the positioning line of the new grouting connection section 3 on the ground.

[0051] (2) Use a crane to place the jacket transport saddle according to the ground layout line, and adjust the horizontal position and top elevation of the transport saddle. (3) The newly made grouting connection section 3 is transported to the assembly area and hoisted onto the corresponding transport saddle. A reflective sheet is attached to the outside of the top end 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 surface elevation differences of the three newly made grouting connection sections 3 meet the requirements.

[0052] (4) Welded ribs are used to reinforce the contact area between the outer side of the lower pipe section of the newly made grouting connection section 3 and the top of the transport saddle to ensure stability during the overall welding and transportation process.

[0053] (5) A temporary welding platform for overall hoisting is set up on the top of the newly made grouting connection section 3 and a guide block is installed on the top of the newly made grouting connection section 3 to facilitate the overall hoisting and welding of the jacket.

[0054] (6) Cut off the supporting circular pipe connecting the jacket and the saddle, lift the jacket as a whole, and lift and connect the jacket and the newly made grouting connection section 3.

[0055] S4. Reinstall the jacket on the engineering pile 4 through the newly made grouting connection section 3.

[0056] Similarly, the repaired and renovated jacket is transported to the vicinity of the engineering piles 4 by a transport ship, and then the jacket is hoisted and installed and positioned on the multiple engineering piles 4 through multiple newly manufactured grouting connection sections 3. Then, grouting is completed to achieve reinstallation of the jacket. At this time, the flatness and verticality of the installed jacket are all within the design allowable deviation.

[0057] Reference Figure 2 and Figure 3 Specifically, the newly manufactured grouting connection section 3 includes a seat body 31, a sleeve 32, a sealing ring 33, a plurality of guide plates 34 and a plurality of grouting devices 35.

[0058] The base 31 is fixedly mounted on the bottom of the frame 1 and includes a main leg tube 311, a connecting plate 312, and a plurality of reinforcing wing plates 313. In this embodiment, the main leg tube 311 is preferably a cylindrical tube structure, the connecting plate 312 is preferably a circular plate structure, and the reinforcing wing plates 313 are preferably a trapezoidal plate structure.

[0059] One end of the main leg tube 311 in the axial direction is fixedly connected to the bottom of the frame 1, and the other end in the axial direction is fixedly connected to the connecting plate 312, and the axis of the main leg tube 311 coincides 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 outside of the main leg tube 311; multiple reinforcing wing plates 313 are all installed on the outside of the main leg tube 311 and are located between the plate-like structure and the connecting plate 312. The multiple reinforcing wing plates 313 are distributed in a circular array with the axis of the main leg tube 311 as the axis, 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 preferred that the main leg tube 311, the connecting plate 312 and the reinforcing wing plates 313 are all fixedly connected by welding.

[0060] The sleeve 32 is generally cylindrical in shape, with a radial dimension no greater than that of the connecting plate 312 and greater than that of the main leg tube 311. One axial end of the sleeve 32 is fixedly connected to the side of the connecting plate 312 facing 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 is preferably fixedly connected to the base body 31 by welding.

[0061] Reference Figure 2 and Figure 4The guide plate 34 is fixedly mounted on the end of the casing 32 away from the base 31 and is used to guide the top of the engineering pile 4 into the space inside the casing 32. In this embodiment, the newly manufactured grouting connection section 3 preferably includes a total of four guide plates 34. The four guide plates are arranged in a circular array on the casing 32 with the axis of the casing 32 as the axis, and the space enclosed by the four guide plates 34 is flared in the direction away from the base 31. The guide plates 34 are preferably detachably connected to the casing 32 by a plurality of bolts and nuts, and the detachable structure is omitted in the drawings.

[0062] The sealing ring 33 is annular in structure and has a certain degree of elasticity. The sealing ring 33 is installed inside the sleeve 32 and is located at the end of the sleeve 32 near 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 a rubber material with a certain degree of elastic deformation, and its normal inner diameter is smaller than the radial dimension of the engineering pile 4. The sealing ring 33 is preferably detachably connected to the sleeve 32, achieved by a plurality of bolts and nuts.

[0063] Reference Figure 3 and Figure 5 The grouting device 35 is installed on the outside of the casing 32 and is used to inject grout into the space inside the casing 32. It includes a grouting pipe 351 and a grouting seat 352.

[0064] 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 grouting seat 352 has a distribution groove 3521 inside it, which is used to provide a uniform and buffering effect on the slurry 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 is connected and communicated with the other end of the distribution groove 3521. The other end of the grouting pipe 351 extends above the sea surface for slurry to enter. In this embodiment, the grouting seat 352 is preferably annular and surrounds the outer side of the sleeve 32, with its axis coinciding with the axis of the sleeve 32. A plurality of openings are arranged in a circumferential array between the distribution groove 3521 and the grouting space 321. The newly manufactured grouting connection section 3 preferably includes two grouting devices 35 to improve grouting efficiency, and the distribution grooves 3521 of the two grouting devices 35 are located at different heights at the points where they communicate with the grouting space 321.

[0065] To improve the connection strength after the newly grouted connection section 3 is fixedly connected to the engineering pile 4, multiple shear keys 5 are preferably fixedly installed on the inner surface of the casing 32 and the outer surface of the top of the engineering pile 4. In this embodiment, the shear keys 5 are preferably annular structures, and the axes of the multiple shear keys 5 on the casing 32 coincide with the axis of the casing 32 and are evenly spaced along the axis of the casing 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 spaced along the axis of the engineering pile 4.

[0066] During the installation and construction of the jacket, the jacket will be transported by a transport ship to the vicinity of the location of the engineering piles 4, and then the crane on the transport ship will control it to complete the lifting and positioning on the corresponding multiple engineering piles 4, so that the multiple engineering piles 4 respectively enter the internal space of the multiple casings 32, and the tops of the engineering piles 4 are in contact with and against the connecting plates 312 of the corresponding base bodies 31.

[0067] Reference Figure 2 and Figure 3 During the process of lifting and positioning the jacket, the top of the engineering pile 4 will first enter the space inside the casing 32 under the guidance of the guide plate 34, and then contact the sealing ring 33, driving the sealing ring 33 to elastically deform 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 against the seat body 31. At this time, the axis of the engineering pile 4 and the axis of the casing 32 tend to be highly coincident, and a grouting space 321 for slurry injection and filling is formed above the sealing ring 33 between the casing 32 and the engineering pile 4. One end of the distribution groove 3521 is connected to the position near the bottom of the grouting space 321, and the multiple shear keys 5 on the casing 32 and the multiple shear keys 5 on the engineering pile 4 are all located in the grouting space 321.

[0068] The connecting plate 312 is provided with a plurality of through holes 3121 for connecting the grouting space 321 with the outside, so that after the slurry enters the grouting space 321 , the seawater and other substances originally in the grouting space 321 can be driven out of the grouting space 321 through the through holes 3121 .

[0069] After the jacket is hoisted and positioned, grouting device 35 is used to inject grouting space 321 until the grouting space 321 is completely filled. Once the grouting solidifies, the newly grouted connection section 3 and the engineering pile 4 are securely connected. The solidified grout forms a thickened layer on the outside of the top of the engineering pile 4, effectively increasing the connection strength between the newly grouted connection section 3 and the engineering pile 4 and the structural strength of the connection.

[0070] Example 3: Reference Figure 6 and Figure 7 In order to improve the grouting efficiency and effect of the grouting device 35 in the grouting space 321 , it is preferred that the newly manufactured grouting connection section 3 further includes a floating member 36 .

[0071] The floating member 36 is annular in structure as a whole, with a density greater than seawater and less than slurry, an outer diameter smaller than the inner diameter of the casing 32 and an inner diameter greater than the radial dimension of the engineering pile 4 .

[0072] Before the newly fabricated grouting connection section 3 is installed and positioned on the construction pile 4, the floating member 36 is installed inside the casing 32. It is located on the side of the sealing ring 33 closest to the base 31 and, under the action of its own gravity, contacts and abuts the sealing ring 33. When the newly fabricated grouting connection section 3 is installed and positioned on the construction pile 4, the floating member 36 maintains contact and abuts the sealing ring 33. A grouting space 321 is formed between the floating member 36 and the sealing ring 33, which facilitates the entry of grouting material. The end of the distribution groove 3521 away from the grouting pipe 351 is connected to this space. In this embodiment, the two grouting devices 35 are preferably symmetrically distributed on the casing 32.

[0073] Each shear key 5 has a guide surface at one end near the grouting space 321. As the floating member 36 moves toward the base 31 as the grouting space 321 is filled with grout, contact with the guide surface will guide the floating member 36 through the space between the multiple shear keys 5 on the casing 32 and the multiple shear keys 5 on the engineering pile 4, reducing the probability of the floating member 36 becoming stuck in the grouting space 321. In this embodiment, the guide surface is preferably a circular arc surface.

[0074] When the slurry fills the grouting space 321, the floating member 36 contacts and abuts against the connecting plate 312 in the grouting space 321, and can simultaneously cover multiple through holes 3121, effectively preventing the slurry 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 slurry solidification.

[0075] The implementation principle of the modification process of the offshore wind turbine jacket grouting connection section in the embodiment of the present application is as follows: When the grouting device 35 is used to inject slurry into the grouting space 321, the slurry first enters the space formed between the floating member 36 and the sealing ring 33. As the slurry is injected, 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 member 36 will move upward with the injection of the slurry, making the slurry more evenly distributed in the grouting space 321, and effectively reducing the influence of seawater on the filling of the grouting space 321 by the slurry. When the grouting space 321 is filled with slurry, the floating member 36 blocks the plurality of through holes 3121 , reducing the probability of slurry outflow and seawater inflow, which helps to improve the efficiency and effect of slurry solidification.

[0076] Example 4: Reference Figure 8 and Figure 9 The difference between this embodiment and embodiment 2 lies in the shear key 5 and the floating member 36.

[0077] The shear keys 5 are strip-shaped, and a plurality of 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 axis of the sleeve 32 , and the plurality of shear keys 5 are distributed in a circular array on the sleeve 32 with the axis of the sleeve 32 as the axis.

[0078] The outer diameter of the floating member 36 is equal to the inner diameter of the sleeve 32 , and the inner diameter of the floating member 36 is equal to the radial dimension of the engineering pile 4 . The outer and inner sides of the floating member 36 are both provided with matching grooves for sliding fit with the shear key 5 .

[0079] 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 by its sleeve cooperation with the engineering pile 4, and in this process, the space between the floating part 36 and the sealing ring 33 can effectively prevent seawater from entering, further facilitating the injection of slurry into the grouting space 321.

[0080] During the grouting process, multiple shear keys 5 can guide the floating part 36 to facilitate its movement toward the seat body 31 as the grouting is injected. At the same time, it can effectively separate the seawater and other materials originally located in the grouting space 321 from the slurry entering the grouting space 321, further reducing the impact of seawater on the uniformity of the slurry.

[0081] When the floating member 36 moves toward the seat body 31 until there is only a certain distance between it and the connecting plate 312, the floating member 36 and the multiple shear keys 5 are separated at the same time to release the sliding fit. At this time, the gas, seawater and other substances located under the floating member 36 will be discharged successively through the multiple sliding grooves 361 and the multiple through holes 3121. Finally, the floating member 36 will block the multiple through holes 3121 at the same time to complete the grouting.

[0082] The implementation principle of the modification process of the grouting connection section of the offshore wind turbine jacket in the embodiment of the present application is as follows: During the process of injecting slurry into the grouting space 321 through the grouting device 35, the slurry first enters the space formed between the floating member 36 and the sealing ring 33. As the slurry is injected, seawater and other substances originally located in the grouting space 321 are discharged through the through hole 3121. At the same time, the floating member 36 moves upward under the guidance of the multiple shear keys 5 as the slurry is injected, effectively separating seawater and other substances from the grouting space 321 during the process of the slurry being evenly filled in the grouting space 321, thereby further effectively reducing the impact of seawater on the slurry filling the grouting space 321. Before the grouting space 321 is about to be filled with slurry, the gas, seawater and other substances in the grouting space 321 will be discharged successively through the multiple sliding grooves 361 and the multiple through holes 3121; Afterwards, as the grouting continues, the floating member 36 simultaneously blocks the multiple through holes 3121, reducing the probability of slurry outflow and seawater inflow, which helps to improve the efficiency and effect of slurry solidification.

[0083] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. The transformation process of the grouting connection section of the offshore wind power jacket is characterized by: This method is used when there is position deviation of the offshore wind turbine jacket after the grouting connection section is completed, and includes the following steps: S1, cutting and separating the original grouting connection section (2) from the jacket body (1); S2, repairing and renovating the bottom of the frame (1); S3, fixing the newly made grouting connection section (3) to the bottom of the frame (1); S4, reinstalling the jacket on the engineering pile (4) through the newly made grouting connection section (3); The newly manufactured grouting connection section (3) comprises a seat body (31), a sleeve (32), a sealing ring (33) and a plurality of 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 be fitted with the engineering pile (4), and the sealing ring (33) is provided at one end of the sleeve (32) away from the base (31); the grouting device (35) is provided on the outside of the sleeve (32) and is used to grout the space inside the sleeve (32); After the seat body (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 circumference of the top of the engineering pile (4), and a plurality of through holes (3121) for connecting the grouting space (321) with the outside are opened on the seat body (31).

2. The process for transforming the grouting connection section of an offshore wind turbine jacket according to claim 1 is characterized in that: The newly made grouting connection section (3) further includes a plurality of guide plates (34); The guide plate (34) is arranged at one end of the sleeve (32) away from the seat body (31) and is located on a side of the sealing ring (33) away from the seat body (31), and the interiors of the plurality of guide plates (34) are enclosed to form a space that is expanded in a direction away from the seat body (31).

3. The process for reconstructing the grouting connection section of an offshore wind power jacket according to claim 1, characterized in that: The grouting device (35) comprises a grouting pipe (351) and a grouting seat (352); The grouting seat (352) is arranged on the outside of one end of the sleeve (32) away from the seat body (31), and is located on the side of the sealing ring (33) close to the seat body (31); a distribution groove (3521) is provided inside the grouting seat (352), one end of the grouting pipe (351) is fixedly connected to the grouting seat (352) and the other end is used for slurry input, and the two ends of the distribution groove (3521) are respectively communicated with the grouting space (321) and the grouting pipe (351).

4. The process for reconstructing the grouting connection section of an offshore wind power jacket according to claim 3 is characterized in that: The newly made grouting connection section (3) further includes a floating member (36); The floating member (36) is installed together with the sleeve (32) outside the engineering pile (4), is located in the grouting space (321), and has a density greater than seawater and less than slurry; when the floating member (36) moves toward the seat (31) to the extreme position, the floating member (36) blocks the plurality of through holes (3121).

5. The process for reconstructing the grouting connection section of an offshore wind turbine jacket according to claim 4 is characterized in that: Before the grouting device (35) grouts in the grouting space (321), the floating member (36) contacts and abuts against the sealing ring (33), and the distribution groove (3521) communicates with the space between the floating member (36) and the sealing ring (33).

6. The process for reconstructing the grouting connection section of an offshore wind turbine jacket according to claim 4, characterized in that: The newly made grouting connection section (3) further comprises a plurality of shear keys (5), and the shear keys (5) are arranged on the inner surface of the sleeve (32).

7. The process for reconstructing the grouting connection section of an offshore wind turbine jacket according to claim 6, characterized in that: The shear key (5) is an annular structure, the axis of which coincides with the axis of the sleeve (32), and the end thereof away from the sleeve (32) has a guide surface for guiding the floating member (36) to pass through.

8. The process for reconstructing the grouting connection section of an offshore wind turbine jacket according to claim 7, characterized in that: The shear key (5) is in a strip-shaped structure, the length direction of which is parallel to the axial direction of the sleeve (32), and a plurality of matching grooves for slidingly matching with the shear key (5) are provided on the outer side of the floating member (36).

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