Jacket foundation grouting reinforcement connecting structure

Abstract

The utility model relates to a jacket foundation grouting reinforcement connecting structure. The method is suitable for the technical field of offshore wind power. The technical problem to be solved by the application is to provide the jacket foundation grouting reinforcement connection structure. According to the technical scheme, a plugging assembly is arranged in a steel pipe pile, so that a cylindrical grouting area is formed in the steel pipe pile; the jacket supporting legs are embedded in the steel pipe piles or arranged outside the steel pipe piles in a sleeving mode, and the jacket supporting legs are connected with the ends of the steel pipe piles through jacket supporting assemblies, so that the jacket supporting legs can block the ends of the steel pipe piles; the grouting packer is arranged between the steel pipe pile and the jacket supporting leg, so that an annular grouting area is formed by the overlapped part of the steel pipe pile and the jacket supporting leg; the first grouting pipe leads to the annular grouting area and is used for injecting a high-strength grouting material into the annular grouting area; and the second grouting pipe leads to the cylindrical grouting area and is used for injecting a common grouting material into the cylindrical grouting area.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power, in particular to a jacket foundation grouting reinforcement connection structure. Background Art

[0002] In recent years, offshore wind power, as an important part of clean energy, has huge development potential.

[0003] With the rapid development of offshore wind power, future development is bound to extend to deep seas. Floating wind turbine foundations are expensive, while jacket foundations have a wider range of applications due to their adaptability to water depths. However, as water depths increase and the capacity of individual wind turbines increases, the loads borne by the jacket legs increase. Currently, the 120 MPa grouting material commonly used on the market is already a top-tier grouting material. Further improving the mechanical properties of the grouting material requires the addition of fiber, but this increases the risk of clogging the grouting pipes. As loads increase, the traditional high-strength grouting material currently used between the jacket and steel pipe piles is no longer sufficient. Furthermore, as water depths increase, underwater welding becomes increasingly difficult, necessitating additional reinforcement measures to ensure a reliable connection between the jacket and steel pipe piles and effective force transmission. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the above-mentioned problems, a jacket foundation grouting reinforcement connection structure is provided.

[0005] The technical solution adopted by the utility model is: a jacket foundation grouting reinforcement connection structure, characterized by comprising:

[0006] A steel pipe pile is provided with a plugging assembly inside, so that a columnar grouting area is formed inside the steel pipe pile;

[0007] a jacket leg, embedded in the steel pipe pile or externally mounted on the steel pipe pile, the jacket leg being connected to the end of the steel pipe pile via a jacket support assembly so that the jacket leg can seal the end of the steel pipe pile;

[0008] a grouting packer disposed between the steel pipe pile and the jacket leg so that an overlapping portion therebetween forms an annular grouting area;

[0009] a first grouting pipe leading to the annular grouting area, the first grouting pipe being used to inject high-strength grouting material into the annular grouting area;

[0010] The second grouting pipe leads to the columnar grouting area, and is used to inject common grouting material into the columnar grouting area.

[0011] Through the above technical means, an embedded or outer sleeve connection is made between the jacket leg and the steel pipe pile, an annular grouting area is formed at the overlapping part of the connection, and a columnar grouting area is formed in the steel pipe pile. High-strength grouting material is injected into the annular grouting area, and ordinary grouting material is injected into the columnar grouting area, thereby forming a double-channel grouting at the connection between the jacket leg and the steel pipe pile to improve the structural strength of the connection.

[0012] In some embodiments, the jacket support assembly includes a jacket support plate, a jacket reinforcement plate and a blocking plate. If the jacket leg is embedded in the steel pipe pile, the outer wall of the jacket leg is circumferentially connected to the jacket support plate, the jacket support plate is connected to and blocks the end of the steel pipe pile, the jacket reinforcement plate is circumferentially spaced between the outer wall of the jacket leg and the jacket support plate, and the end of the jacket leg located in the steel pipe pile is blocked by the blocking plate;

[0013] If the jacket of the jacket leg is disposed outside the steel pipe pile, the inner wall of the jacket leg is connected to the jacket support plate, the jacket support plate is connected to and blocks the end of the steel pipe pile, and the jacket reinforcement plate is provided circumferentially between the inner wall of the jacket leg and the jacket support plate.

[0014] In some embodiments, a guide assembly is further included, wherein the guide assembly is arranged in the columnar grouting area, and the guide assembly is used to provide grouting guidance for the second grouting pipe.

[0015] In some embodiments, the guide assembly includes a guide tube, one end of which is connected to the conductor frame support assembly, and the other end of the guide tube is connected to the sealing assembly. The second grouting pipe is arranged inside the conductor frame leg, and the end of the second grouting pipe passes through the conductor frame support assembly and extends into the guide tube until the end of the second grouting pipe passes through the side wall of the guide tube and is introduced into the columnar grouting area.

[0016] In some embodiments, the guide assembly further includes a guide reinforcement plate, which is disposed between the side wall of the guide tube and the sealing assembly.

[0017] In some embodiments, the sealing assembly includes a grouting bottom plate and a guide bottom plate. The inner wall of the steel pipe pile is welded with the ring-shaped grouting bottom plate, and the center of the grouting bottom plate is connected to the guide bottom plate.

[0018] In some embodiments, a sealing rubber is provided at the connection between the grouting bottom plate and the guide bottom plate, and the size and compression deformation of the sealing rubber should meet the deviations caused by pile sinking and production.

[0019] In some embodiments, a plurality of shear keys are arranged in the annular grouting area.

[0020] In some embodiments, a plurality of reinforcing steel bars are arranged in the columnar grouting area along the axial direction of the steel pipe pile.

[0021] Another technical solution adopted by the present invention is: a construction method for a jacket foundation grouting reinforcement connection structure, comprising the following steps:

[0022] S1. First, determine the connection method between the jacket legs and the steel pipe piles. If the geological conditions are poor and the jacket foundation piles have high bearing capacity requirements, the jacket legs are embedded in the steel pipe piles. If the geological conditions are good and the jacket foundation piles have sufficient bearing capacity, the jacket legs are enclosed in the steel pipe piles.

[0023] S2. When making steel pipe piles, weld the grouting bottom plate and reinforcing steel bars inside. When sinking the piles, ensure that the steel pipe piles and the grouting bottom plate are constructed in place together;

[0024] S3. Hoist the upper jacket, embed its jacket legs into or sheath them on the steel pipe piles, and pre-install jacket support plates and support reinforcement plates at the connection points between the jacket legs and the tops of the steel pipe piles so that they can support the jacket's own weight before grouting.

[0025] S4. A grouting packer is pre-set on the jacket leg for grouting and plugging. A first grouting pipe is pre-set on the jacket leg. After the jacket is sunk into place and leveled, high-strength grouting material is poured through the first grouting pipe.

[0026] S5. Set a guide bottom plate in the steel pipe pile to cooperate with the grouting bottom plate for sealing, set a guide pipe in the steel pipe pile, arrange a second grouting pipe in the guide pipe, and after the high-strength grouting material is grouting, the ordinary grouting material is poured through the second grouting pipe.

[0027] The beneficial effects of the utility model are:

[0028] 1. Based on geological conditions and the required bearing capacity of the jacket foundation piles, an embedded or sheathed connection is selected between the jacket legs and the steel pipe piles. An annular grouting zone is formed between the jacket legs and the steel pipe piles, into which high-strength grouting material is injected. At the connection between the jacket legs and the steel pipe piles, a cylindrical grouting zone is formed within the steel pipe piles, into which ordinary grouting material is injected. This creates a double-pass grouting system at the connection between the jacket legs and the steel pipe piles, enhancing the connection reliability and ensuring the force transmission performance of the connection. Furthermore, the presence of the double-pass grouting system increases the overall stiffness of the foundation and reduces the deformation of the foundation mud surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the connection structure in which the jacket legs are embedded in the steel pipe piles in this application.

[0030] Figure 2 This is a schematic diagram of the connection structure of the jacket legs in this application being sheathed around the steel pipe piles.

[0031] Figure 3 yes Figure 1 sectional view.

[0032] Description of reference numerals:

[0033] 1. Jacket legs; 2. Steel pipe piles; 3. Grouting packer; 4. First grouting pipe; 5. Second grouting pipe; 6. Jacket support plate; 7. Jacket reinforcement plate; 8. Blocking plate; 9. Guide pipe; 10. Guide reinforcement plate; 11. Grouting bottom plate; 12. Guide bottom plate; 13. Sealing rubber; 14. Shear key; 15. Reinforced steel bar; 16. High-strength grouting material; 17. Ordinary grouting material.

[0034] This specification includes references to "one embodiment" or "an embodiment." The appearance of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. The particular features, structures, or characteristics may be combined in any suitable manner consistent with the present disclosure.

[0035] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps.

[0036] “First,” “second,” etc. As used herein, these terms act as labels for the nouns that precede them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0038] Example 1:

[0039] Combine Figures 1 to 3As shown, this embodiment is a jacket foundation grouting reinforcement connection structure comprising a steel pipe pile 2, a jacket leg 1, a grouting packer 3, a first grouting pipe 4, and a second grouting pipe 5. The jacket leg 1 is embedded within the steel pipe pile 2 or externally mounted. The jacket leg 1 is connected to the end of the steel pipe pile 2 via a jacket support assembly, enabling the jacket leg 1 to seal the end of the steel pipe pile 2. A sealing assembly is provided within the steel pipe pile 2, which cooperates with the jacket support assembly to form a cylindrical grouting area within the steel pipe pile 2. A grouting packer 3 is provided between the steel pipe pile 2 and the jacket leg 1, forming an annular grouting area in the overlapping portion thereof. The first grouting pipe 4 leads to the annular grouting area and is used to inject high-strength grouting material 16 into the annular grouting area. The second grouting pipe 5 leads to the cylindrical grouting area and is used to inject conventional grouting material 17 into the cylindrical grouting area.

[0040] In some embodiments, as Figure 1 and Figure 3 As shown, when the jacket leg 1 is embedded within the steel pipe pile 2, the jacket support assembly includes a jacket support plate 6, a jacket reinforcement plate 7, and a blocking plate 8. The jacket support plate 6 is circumferentially connected to the outer wall of the jacket leg 1. The jacket support plate 6 connects to and blocks the outer edge of the end of the steel pipe pile 2. Jacket reinforcement plates 7 are circumferentially spaced between the outer wall of the jacket leg 1 and the jacket support plate 6. The end of the jacket leg 1 located within the steel pipe pile 2 is blocked by the blocking plate 8. The cooperation between the jacket support plate 6 and the grouting packer 3 forms an annular grouting area between the outer wall of the jacket leg 1 and the inner wall of the steel pipe pile 2.

[0041] Furthermore, multiple shear keys 14 are arranged within the annular grouting area, which enhance the structural integrity and shear resistance. A first grouting pipe 4 is arranged within the jacket leg 1. The end of the first grouting pipe 4 penetrates the sidewall of the jacket leg 1 and is introduced into the annular grouting area. High-strength grouting material 16 can be injected into the annular grouting area through the first grouting pipe 4.

[0042] Furthermore, the sealing assembly includes a grouting seal plate 11 and a guide seal plate 12. The ring-shaped grouting seal plate 11 is welded to the inner wall of the steel pipe pile 2, and the guide seal plate 12 is connected to the center of the grouting seal plate 11. Specifically, a sealing rubber 13 is installed at the connection between the grouting seal plate 11 and the guide seal plate 12. The size and compression deformation of the sealing rubber 13 should meet the deviations caused by pile driving and manufacturing. The coordination of the grouting seal plate 11, the guide seal plate 12, the sealing plate 8, and the grouting packer 3 forms a columnar grouting area within the steel pipe pile 2.

[0043] Furthermore, a guide assembly is provided within the columnar grouting area to provide grouting guidance for the second grouting pipe 5. The guide assembly includes a guide pipe 9, one end of which is connected to a sealing plate 8 and the other end to a guide bottom plate 12. The second grouting pipe 5 is arranged within the jacket leg 1. The end of the second grouting pipe 5 penetrates the sealing plate 8 and extends into the guide pipe 9 until the end of the second grouting pipe 5 penetrates the sidewall of the guide pipe 9 and is introduced into the columnar grouting area. This allows the injection of conventional grouting material 17 into the columnar grouting area through the second grouting pipe 5.

[0044] Furthermore, the guide assembly includes a guide reinforcement plate 10, which is connected to the outer wall of the guide tube 9. The two ends of the guide reinforcement plate 10 are respectively connected to the plugging plate 8 and the guide bottom plate 12. Multiple reinforcing steel bars 15 are arranged axially along the steel pipe pile 2 within the columnar grouting area. Some of the reinforcing steel bars 15 are pre-welded to the plugging plate 8, and some are pre-welded to the grouting bottom plate 11. This improves the connection between the ordinary grouting material 17 and the plugging plate 8 and the grouting bottom plate 11.

[0045] In some embodiments, as Figure 2 As shown, when the jacket leg 1 is fitted over the steel pipe pile 2, the jacket support assembly includes a jacket support plate 6 and a jacket reinforcement plate 7. The inner wall of the jacket leg 1 is connected to the jacket support plate 6, which connects to and seals the ends of the steel pipe pile 2. Jacket reinforcement plates 7 are circumferentially spaced between the inner wall of the jacket leg 1 and the jacket support plate 6. The cooperation between the jacket support plate 6 and the grouting packer 3 forms an annular grouting area between the inner wall of the jacket leg 1 and the outer wall of the steel pipe pile 2.

[0046] Furthermore, multiple shear keys 14 are arranged within the annular grouting area, which enhance the structural integrity and shear resistance. A first grouting pipe 4 is arranged outside the jacket leg 1. The end of the first grouting pipe 4 penetrates the sidewall of the jacket leg 1 and is introduced into the annular grouting area. High-strength grouting material 16 can be injected into the annular grouting area through the first grouting pipe 4.

[0047] Furthermore, the sealing assembly includes a grouting seal plate 11 and a guide seal plate 12. The ring-shaped grouting seal plate 11 is welded to the inner wall of the steel pipe pile 2, and the guide seal plate 12 is connected to the center of the grouting seal plate 11. Specifically, a sealing rubber 13 is installed at the connection between the grouting seal plate 11 and the guide seal plate 12. The size and compression deformation of the sealing rubber 13 should meet the deviations caused by pile driving and manufacturing. The coordination of the grouting seal plate 11, the guide seal plate 12, the sealing plate 8, and the grouting packer 3 forms a columnar grouting area within the steel pipe pile 2.

[0048] Furthermore, a guide assembly is provided within the columnar grouting area to provide grouting guidance for the second grouting pipe 5. The guide assembly includes a guide pipe 9, one end of which is connected to the jacket support plate 6 and the other end to the guide bottom plate 12. The second grouting pipe 5 is arranged within the jacket leg 1. The end of the second grouting pipe 5 penetrates the jacket support plate 6 and extends into the guide pipe 9 until the end of the second grouting pipe 5 penetrates the sidewall of the guide pipe 9 and is introduced into the columnar grouting area. This allows the second grouting pipe 5 to inject conventional grouting material 17 into the columnar grouting area.

[0049] Furthermore, the guide assembly includes a guide reinforcement plate 10, which is connected to the outer wall of the guide tube 9 and the end of the guide reinforcement plate 10 is connected to the guide bottom plate 12. A plurality of reinforcing steel bars 15 are arranged along the axial direction of the steel pipe pile 2 in the columnar grouting area.

[0050] The implementation principle of a jacket foundation grouting reinforcement connection structure is as follows:

[0051] In this embodiment, the connection structure between the jacket leg 1 and the steel pipe pile 2 adopts a double-channel grouting technology. Depending on different geological conditions, an embedded or outer sleeve connection type can be selected. The annular space formed by the gap between the jacket leg 1 and the steel pipe pile 2 is used. This annular space is the annular grouting area, and high-strength grouting material 16 is injected into the annular grouting area. This grouting material has high strength and durability, can effectively fill the gap, and improve the shear resistance and overall stiffness of the connection.

[0052] A cylindrical space, or columnar grouting zone, is then formed within the steel pipe pile 2, near the jacket leg 1. Conventional grouting material 17 is injected into this columnar grouting zone, providing internal support and further enhancing the stability and force transmission performance of the connection. This double-pass grouting strengthens the connection between the jacket leg 1 and the steel pipe pile 2, improving the overall structure's load-bearing capacity and effectively reducing settlement and deformation of the foundation at the mud surface, thereby ensuring the safety and long-term stability of the structure.

[0053] At the same time, if single-channel grouting technology uses higher-strength grouting materials (such as adding fibers), it may increase the risk of pipe blockage. Double-channel grouting uses different materials in different areas, which can ensure strength while reducing construction difficulties caused by material characteristics.

[0054] Example 2:

[0055] This embodiment is a construction method for a jacket foundation grouting reinforcement connection structure, comprising the following steps:

[0056] S1. First, determine the connection mode between the jacket leg 1 and the steel pipe pile 2. If the geological conditions are poor and the bearing capacity of the jacket foundation pile is high, the jacket leg 1 is embedded in the steel pipe pile 2. If the geological conditions are good and the bearing capacity of the jacket foundation pile is easily met, the jacket leg 1 is externally mounted on the steel pipe pile 2.

[0057] S2. When manufacturing the steel pipe pile 2, the grouting bottom plate 11 and the reinforcing steel bar 15 are welded inside. When sinking the pile, ensure that the steel pipe pile 2 and the grouting bottom plate 11 are constructed in place together.

[0058] S3. Hoist the upper jacket, embed or sheath the jacket legs 1 into the steel pipe piles 2, and pre-install jacket support plates 6 and support reinforcement plates at the connection between the jacket legs 1 and the tops of the steel pipe piles 2 to support the jacket weight before grouting.

[0059] S3.1. A shear key 14 is provided at the connection between the jacket leg 1 and the steel pipe pile 2 to enhance the connectivity and force transmission performance between the subsequent high-strength grouting material 16 and the two.

[0060] S4. A grouting packer 3 is preset on the jacket leg 1 for grouting and plugging. A first grouting pipe 4 is preset on the jacket leg 1. After the jacket is sunk into place and leveled, high-strength grouting material 16 is poured through the first grouting pipe 4.

[0061] S5. A guide bottom plate 12 is set in the steel pipe pile 2 to cooperate with the grouting bottom plate 11 for sealing. A guide pipe 9 is set in the steel pipe pile 2, and a second grouting pipe 5 is arranged in the guide pipe 9. After the grouting of the high-strength grouting material 16 is completed, the ordinary grouting material 17 is poured through the second grouting pipe 5.

[0062] S5.1. If the jacket leg 1 is embedded in the steel pipe pile 2, a sealing plate 8 is provided at the bottom of the jacket leg 1. A guide tube 9 is welded to the center of the sealing plate 8. The bottom of the guide tube 9 is connected to a guide sealing bottom plate 12. A guide reinforcement plate 10 is used to enhance the connectivity between the steel pipe pile 2 and the jacket leg 1. Reinforcement steel bars 15 are then provided on the grouting sealing bottom plate 11 and the sealing plate 8. After the high-strength grouting is completed, the grouting construction of the ordinary grouting material 17 is carried out.

[0063] S5.2. If the jacket leg 1 is fitted over the steel pipe pile 2, the top of the guide tube 9 is welded to the jacket support plate 6, and the bottom of the guide tube 9 is connected to the guide bottom plate 12. A guide reinforcement plate 10 is used to enhance overall load-bearing capacity. To further enhance connectivity between the steel pipe pile 2 and the jacket leg 1, a second grouting pipe 5 is installed between the jacket support plate 6 and the guide tube 9. Reinforcement steel bars 15 are installed on the grouting bottom plate 11 and the jacket support plate 6. After high-strength grouting is completed, the second grouting pipe 5 is used to grout the standard grouting material 17.

[0064] S5.3. To prevent leakage of common grouting material 17, a sealing rubber 13 is provided between the guide bottom plate 12 and the grouting bottom plate 11. The size and compression deformation of the sealing rubber 13 should satisfy the deviation caused by the pile driving deviation and the manufacturing deviation.

[0065] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A jacket foundation grouting reinforcement connection structure, characterized in that: include: A steel pipe pile (2) is provided with a plugging assembly inside, so that a columnar grouting area is formed inside the steel pipe pile (2); A jacket support leg (1) is embedded in the steel pipe pile (2) or externally disposed on the steel pipe pile (2), and the jacket support leg (1) is connected to the end of the steel pipe pile (2) via a jacket support assembly, so that the jacket support leg (1) can seal the end of the steel pipe pile (2); A grouting packer (3) is provided between the steel pipe pile (2) and the jacket leg (1), so that the overlapping portion between the two forms an annular grouting area; A first grouting pipe (4) leads to the annular grouting area, and the first grouting pipe (4) is used to inject high-strength grouting material (16) into the annular grouting area; A second grouting pipe (5) leads to the columnar grouting area, and the second grouting pipe (5) is used to inject ordinary grouting material (17) into the columnar grouting area.

2. The jacket foundation grouting reinforcement connection structure according to claim 1, characterized in that: The jacket support assembly includes a jacket support plate (6), a jacket reinforcement plate (7) and a blocking plate (8). If the jacket leg (1) is embedded in the steel pipe pile (2), the outer wall of the jacket leg (1) is circumferentially connected with the jacket support plate (6), the jacket support plate (6) is connected to and blocks the end of the steel pipe pile (2), the jacket reinforcement plate (7) is circumferentially spaced between the outer wall of the jacket leg (1) and the jacket support plate (6), and the end of the jacket leg (1) located in the steel pipe pile (2) is blocked by the blocking plate (8); If the jacket of the jacket leg (1) is disposed outside the steel pipe pile (2), the inner wall of the jacket leg (1) is connected to the jacket support plate (6), the jacket support plate (6) is connected to and blocks the end of the steel pipe pile (2), and the jacket reinforcement plate (7) is provided between the inner wall of the jacket leg (1) and the jacket support plate (6) along the circumferential direction.

3. The jacket foundation grouting reinforcement connection structure according to claim 1, characterized in that: It also includes a guide assembly, which is arranged in the columnar grouting area and is used to provide grouting guidance for the second grouting pipe (5).

4. The jacket foundation grouting reinforcement connection structure according to claim 3, characterized in that: The guide assembly comprises a guide pipe (9), one end of the guide pipe (9) is connected to the jacket support assembly, and the other end of the guide pipe (9) is connected to the plugging assembly. The second grouting pipe (5) is arranged inside the jacket leg (1), and the end of the second grouting pipe (5) passes through the jacket support assembly and extends into the guide pipe (9) until the end of the second grouting pipe (5) passes through the side wall of the guide pipe (9) and is introduced into the columnar grouting area.

5. The jacket foundation grouting reinforcement connection structure according to claim 4, characterized in that: The guide assembly further comprises a guide reinforcement plate (10), and the guide reinforcement plate (10) is arranged between the side wall of the guide tube (9) and the blocking assembly.

6. The jacket foundation grouting reinforcement connection structure according to claim 1, characterized in that: The plugging assembly comprises a grouting bottom plate (11) and a guide bottom plate (12); the inner wall of the steel pipe pile (2) is welded with the annular grouting bottom plate (11); and the center of the grouting bottom plate (11) is connected to the guide bottom plate (12).

7. The jacket foundation grouting reinforcement connection structure according to claim 6, characterized in that: A sealing rubber (13) is provided at the connection between the grouting bottom sealing plate (11) and the guide bottom sealing plate (12). The size and compression deformation of the sealing rubber (13) should meet the deviations caused by pile sinking and manufacturing.

8. The jacket foundation grouting reinforcement connection structure according to claim 1, characterized in that: A plurality of shear keys (14) are arranged in the annular grouting area.

9. The jacket foundation grouting reinforcement connection structure according to claim 1, characterized in that: A plurality of reinforcing steel bars (15) are arranged in the columnar grouting area along the axial direction of the steel pipe pile (2).

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