Steel pipe pile and submarine cable pile body wire inlet method

Abstract

The invention discloses a steel pipe pile and a submarine cable pile body wire inlet method, and relates to the technical field of offshore wind power engineering. The steel pipe pile comprises a pile foundation and an inner platform, the pile foundation comprises a supporting plate used for installing the inner platform, the pile foundation further comprises a positioning and connecting mechanism used for fixing a first traction rope, and an in-pile fixing assembly of the positioning and connecting mechanism is installed on the side, close to the top of the steel pipe pile, of the supporting plate on the inner surface of the pile foundation; the inner platform comprises a second pulling rope which is connected with the first pulling rope to pull the submarine cable to complete submarine cable pile body wire inlet. The method comprises the steps that the in-pile connecting end of a first traction rope is connected to the second connecting end of a second traction rope, and the connecting position of the first traction rope and the second traction rope after connection is placed below an inner platform; and the inner platform continues to be lowered to the supporting plate, and the submarine cable is pulled through the fixed end of the second pulling rope to conduct pile body wire inlet of the steel pipe pile. The operation efficiency and the construction safety of on-site constructors are improved, and the method can be used in offshore wind power engineering.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power engineering technology, specifically to a method for introducing steel pipe piles and submarine cable piles. Background Technology

[0002] Offshore wind power, as an important component of renewable energy, has received increasing attention due to its enormous development potential and environmental friendliness. Currently, monopile foundations are the most widely used foundation type in offshore wind power projects. In water depths of 0-30m, monopile foundations can generally meet the turbine load and environmental conditions of the project. The auxiliary structures of a wind turbine monopile foundation mainly include an outer platform, anti-collision components, ladders, cathodic protection, and J-tubes. Typically, the flared end of the J-tube is located 2.5m above the seabed. The submarine cable extends through the J-tube on the auxiliary components to the outer platform, then enters the tower through a through-hole in the inner platform, and finally connects to the wind turbine at the top of the tower. However, when the water depth is deeper, to avoid designing the auxiliary structures too high due to the J-tube arrangement, holes are generally drilled in steel pipe piles at an elevation of approximately 2.5m above the seabed. The submarine cable enters directly through these holes, eliminating the need for cable conduits, thus reducing the amount of auxiliary structure work and the corresponding wave and current loads.

[0003] In existing pile-hole cable entry schemes, how to guide the submarine cable to the cable support on the inner platform is a challenging aspect of the cable construction process. In existing offshore wind power projects with pile-hole cable entry, the cable is typically led up to the inner platform after pile driving by pre-installing steel wire ropes in the pile body. However, the upper part of the steel wire rope is connected to the pile foundation using hooks. During installation, after the inner platform is installed, workers typically use long hooks to reach through a hole in the inner platform and pull the upper end of the steel wire rope onto the platform and secure it to the cable support. This hook connection method is problematic because the hooks cannot completely lock the end. During pile driving, vibrations can easily cause the end of the steel wire rope to detach from the hook, leading to connection difficulties and impacting construction progress. Furthermore, using long hooks to pull the upper end of the steel wire rope through the inner platform's through-hole is often inefficient due to space and component weight limitations. Summary of the Invention

[0004] The purpose of this invention is to provide a method for the entry of steel pipe piles and submarine cable piles, which improves the operational efficiency and construction safety of on-site construction personnel by combining the use of the inner platform traction rope and the pile foundation traction rope. To achieve the above objective, this invention employs the following technical solution.

[0005] In a first aspect, the present invention provides a steel pipe pile, including a pile foundation and an inner platform; the pile foundation includes a steel pipe pile wall and a support plate installed on the inner surface of the steel pipe pile wall, the support plate being adapted to connect the inner platform;

[0006] The steel pipe pile wall is equipped with a positioning connection mechanism for connecting the first traction rope; the positioning connection mechanism includes an internal fixing component for connecting one end of the first traction rope, and the steel pipe pile wall is provided with a pile body through hole for the first traction rope or submarine cable to pass through; the internal fixing component is installed on the side of the support plate near the top of the steel pipe pile.

[0007] The inner platform is provided with an inner platform through hole for the second traction rope or submarine cable to pass through, and the inner platform is provided with a bracket for connecting the second traction rope; the second traction rope includes a first connecting end connected to the bracket for traction of the submarine cable pile and a second connecting end for adapting and connecting the first traction rope and the bracket.

[0008] In the above technical solution, by installing the pile fixing component above the support plate and connecting the pile foundation and the inner platform with the first traction rope and the second traction rope respectively, the construction personnel can easily connect the first traction rope and the second traction rope before the inner platform is lowered into place. The connection point of the two traction ropes is placed below the inner platform, so that the first traction rope and the second traction rope form a support-inner platform through hole-pile wall through hole-submarine cable traction path outside the pile, which can significantly improve the construction efficiency.

[0009] Optionally, both the inner and outer connection ends of the first traction rope are equipped with a sleeve structure, which is connected to the positioning connection mechanism via a shackle.

[0010] The shackle improves the anti-interference capability of the connection between the first traction rope and the positioning connection mechanism, ensuring that the connection between the first traction rope and the positioning connection mechanism will only be opened when it is necessary to detach the first traction rope from the positioning connection mechanism.

[0011] Optionally, the positioning and connection mechanism further includes an external pile fixing component, which is installed on the outer surface of the steel pipe pile wall;

[0012] Both the internal and external fixing components of the pile adopt ear plates, and the two ends of the first traction rope are detachably connected to the ear plates of the internal and external fixing components, respectively.

[0013] The external fixing components ensure that both ends of the first traction rope are connected and restricted, preventing the first traction rope from interfering with other structures during installation. The ear plate structure connects the first traction rope, which not only improves the connection strength of the first traction rope, but also simplifies the positioning and connection mechanism as much as possible.

[0014] Optionally, the through hole in the pile body is located at the bottom of the steel pipe pile wall, and the external fixing component is installed at the edge of the through hole in the pile body.

[0015] By placing the external fixing components at the edge of the through hole in the pile body, the connection structure of the first traction rope is simplified, making it easier to connect the first traction rope to the submarine cable after the pile driving is completed.

[0016] Optionally, multiple lifting lugs are evenly arranged along the circumference of the inner platform surface. These lifting lugs are used to adapt to the hoisting of the inner platform. The evenly arranged multiple lifting lugs ensure the stability of the inner platform installation.

[0017] Optionally, with both the first and second connecting ends of the second traction rope connected to the bracket, the middle part of the second traction rope passes through the through hole of the inner platform and wraps around the edge of the inner platform.

[0018] The second connecting end of the second traction rope is passed through the through hole of the inner platform and then through the edge of the inner platform before being connected to the inner platform support, which improves the convenience and safety of the construction of connecting the first traction rope and the second traction rope.

[0019] Optionally, both the second connecting end and the first connecting end of the second traction rope adopt a sleeve structure, and the first connecting end of the second traction rope is connected to the bracket through the sleeve structure.

[0020] Both the second connecting end and the first connecting end of the second traction rope can be connected to the bracket, thus securing the second traction rope during the installation of the inner platform; the second connecting end of the second traction rope adopts a sleeve structure, ensuring a stable connection between the second traction rope and the first traction rope.

[0021] Optionally, the inner platform has screw holes on its edge for connecting to the support plate, and the inner platform is connected to the support plate by screws. This screw connection improves the overall connection strength of the steel pipe pile.

[0022] In a second aspect, the present invention provides a method for entering a submarine cable pile, which employs the steel pipe pile described in the first aspect above, and the method includes the following steps:

[0023] The first traction rope is fixedly connected to the pile foundation using a positioning and connecting mechanism. After the pile driving is completed, the inner platform is hoisted to the top of the support plate using a lifting device. The pile inner connection end of the first traction rope is connected to the second connection end of the second traction rope. The connection between the first and second traction ropes is placed below the inner platform. The inner platform is then lowered onto the support plate and fixedly connected to the support plate of the pile foundation. The pile outer connection end of the first traction rope is connected to the submarine cable. The submarine cable is then pulled through the first connection end of the second traction rope to guide the steel pipe pile into the pile.

[0024] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0025] This invention improves construction convenience and efficiency by axially spacing the internal fixing components and support plates along the inner surface of the steel pipe pile wall, with the internal fixing components installed closer to the pile top than the support plates. This ensures that on-site construction personnel can install the internal fixing components after the inner platform is hoisted above the support plates. The second connecting end of the second traction rope is connected to the first traction rope, and the submarine cable is pulled through the first connecting end of the second traction rope to complete the entry of the steel pipe pile body, improving the safety of the steel pipe pile body entry. The steel pipe pile described in this invention has broad application prospects in the field of offshore wind power engineering and effectively reduces the construction difficulty of submarine cable pile body entry. Attached Figure Description

[0026] Figure 1 The diagram shown is a schematic of a pile foundation.

[0027] Figure 2 The diagram shown is a schematic of the inner platform;

[0028] Figure 3 This is a schematic diagram showing the connection between the first and second traction ropes for the pile foundation and the inner platform.

[0029] Figure 4 This is a schematic diagram showing the connection between the first and second traction ropes of the pile foundation and the inner platform.

[0030] In the attached diagram: 1, first traction rope; 2, external connection end of pile; 3, support plate; 4, internal fixing assembly of pile; 5, through hole of pile body; 6, shackle; 7, internal connection end of pile; 8, second traction rope; 9, first connection end; 10, second connection end; 11, through hole of inner platform; 12, lifting lug of inner platform; 13, bracket; 14, screw hole; 15, external fixing assembly of pile. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Example 1

[0035] This embodiment introduces a steel pipe pile, and the fixing and connection scheme of the incoming steel wire rope of the submarine cable pile body of the single pile foundation includes two parts, the pile foundation and the inner platform, which need to arrange steel wire rope and related components.

[0036] like Figure 1 As shown, the pile foundation includes a steel pipe pile wall and a support plate 3 installed on the top of the inner surface of the steel pipe pile wall for mounting an inner platform. The support plate 3 is annular and has screw holes for mounting the inner platform, ensuring a fixed connection between the inner platform and the pile foundation and improving the overall connection strength of the steel pipe pile. The inner platform and the support plate can also be connected by welding. The support plate is connected to the inner surface of the steel pipe pile wall by welding, or by screw connection or other methods.

[0037] The steel pipe pile has a positioning connection mechanism installed on its pile wall surface for fixing the first traction rope 1. The first traction rope 1 is used to pull the submarine cable into the steel pipe pile after pile driving is completed. The positioning connection mechanism ensures that the first traction rope 1 can be fixed inside the steel pipe pile before pile driving is completed. The positioning connection mechanism includes an internal pile fixing component 4 and an external pile fixing component 15. Both the internal pile fixing component 4 and the external pile fixing component 15 use ear plates. The two ends of the first traction rope are detachably connected to the internal pile fixing component 4 and the external pile fixing component 15, respectively.

[0038] The external and internal fixing components of the pile are used in conjunction to ensure that both ends of the first traction rope 1 are restricted in connection, preventing the first traction rope 1 from interfering with other structures during installation. The ear plate structure connects the first traction rope, which not only improves the connection strength of the first traction rope, but also simplifies the positioning and connection mechanism as much as possible.

[0039] The first traction rope 1 includes an inner connection end 7 and an outer connection end 2. Both the inner connection end 7 and the outer connection end 2 are equipped with a sleeve, which is connected to the positioning connection mechanism via a shackle 6. The shackle improves the anti-interference capability of the connection between the first traction rope and the positioning connection mechanism, ensuring that the connection between the first traction rope and the positioning connection mechanism will only be opened when it is necessary to disconnect the first traction rope from the positioning connection mechanism.

[0040] The external fixing component 15 is used to connect the external connection end 2 of the first traction rope 1. The external fixing component 15 is installed at the edge of the through hole 5 of the pile body. By arranging the external fixing component 15 at the edge of the through hole of the pile body, the connection structure of the first traction rope is simplified, making it easier to connect the first traction rope to the submarine cable after the pile is driven. The pile fixing component 4 is used to connect the pile connecting end 7 of the first traction rope 1; the pile fixing component 4 and the support plate 3 are axially spaced along the inner surface of the steel pipe pile wall, and the installation position of the pile fixing component 7 is closer to the top of the steel pipe pile than the installation position of the support plate 3; therefore, the pile connecting end 7 of the first traction rope 1 is higher than the support plate 3, and the on-site construction personnel can carry out construction operations on the first traction rope 1 on the inner platform, which improves the operation efficiency and construction safety of the on-site construction personnel; the second traction rope 8 includes a first connecting end 9 connected to the bracket 13 for pulling the submarine cable pile body and a second connecting end 10 for adapting and connecting the first traction rope. The construction process is to detach the pile connecting end 7 of the first traction rope from the pile fixing component 4 and then connect it to the second connecting end 10 of the second traction rope 8.

[0041] like Figure 2 As shown, the inner platform portion of the steel pipe pile includes a second traction rope 8, a support 13, and an inner platform through hole 11; as Figure 2 As shown, the through hole of the inner platform is preferably opened at the center of the mounting platform, but it can also be opened at other locations.

[0042] The bracket 13 is installed on the inner platform. Both the first connecting end 9 and the second connecting end 10 of the second traction rope 8 can adopt a sleeve structure. With both the first connecting end 9 and the second connecting end 10 of the second traction rope 8 connected to the bracket 13, the middle part of the second traction rope 8 passes through the through hole 11 of the inner platform and wraps around the edge of the inner platform. Alternatively, it can be placed above the inner platform. The second connecting end 10 of the second traction rope 8 can pass through the through hole 11 of the inner platform, pass over the edge of the inner platform, and then be placed on top of the inner platform, improving the convenience and safety of the connection construction between the first traction rope 1 and the second traction rope 8. Both the second connecting end 10 and the first connecting end 9 of the second traction rope 8 can be connected to the bracket, achieving fixation of the second traction rope during the installation of the inner platform. The sleeve structure of the second connecting end of the second traction rope ensures a stable connection between the second traction rope 8 and the first traction rope 1.

[0043] The inner platform surface is equipped with multiple inner platform lifting lugs 12 evenly arranged along the circumference. The inner platform lifting lugs 12 are used to cooperate with lifting equipment to complete the installation of the inner platform. The evenly arranged multiple inner platform lifting lugs 12 ensure the stability of the inner platform installation. The inner platform edge is provided with screw holes 14 for connecting to the support plate. The inner platform is connected to the support plate by screws, which improves the overall connection strength of the steel pipe pile.

[0044] In this embodiment, after the pile foundation is driven, the inner platform is hoisted to the top of the support plate using the inner platform lifting lugs connected to the lifting device. The inner connection end of the first traction rope is detached from the inner fixing assembly and connected to the second connection end of the second traction rope. The connection between the first and second traction ropes is placed below the inner platform. The inner platform is then lowered onto the support plate and connected to the support plate of the pile foundation with screws, or the support plate and the inner platform can be connected by welding or other methods. The outer connection end of the first traction rope is detached from the outer fixing assembly and connected to the submarine cable. The submarine cable is pulled by the fixed end of the second traction rope to complete the entry of the steel pipe pile body.

[0045] Example 2

[0046] Based on the same inventive concept as Embodiment 1, this embodiment introduces a method for introducing a submarine cable into a steel pipe pile. In this embodiment, both the first traction rope 1 and the second traction rope 8 are steel wire ropes. The second traction rope 8 is an inner platform steel wire rope, the first traction rope 1 is a steel pipe pile steel wire rope, and the support 13 is a submarine cable support.

[0047] In this embodiment, before offshore construction, steel wire ropes are installed on both the inner platform and the steel pipe piles. The steel pipe pile wire ropes are fixed to the pile foundation through a positioning and connecting mechanism. The inner platform wire rope is pre-passed through the through hole of the inner platform, and then the two ends of the wire rope are fitted onto the submarine cable support on the inner platform. Both ends of the steel pipe pile wire rope are connected to the ear plates of the positioning and connecting mechanism on the pile foundation using shackles 6. This ensures that the inner platform wire rope and the steel pipe pile wire rope will not loosen or fall off during the construction process such as steel pipe pile turning, hoisting, and pile driving. The ear plates of the pile fixing component 4 are located above the inner platform elevation so that they can be connected to the inner platform wire rope during the subsequent hoisting of the inner platform. After the steel pipe piles are driven, the installation of the inner platform begins. A crane on a floating crane vessel is used, connected to the inner platform's lifting lugs 12 via specialized lifting beams, slings, and shackles. The inner platform is then slowly lifted, ensuring its levelness during the process. The platform is precisely moved above the steel pipe piles, and then slowly lowered. When the inner platform reaches the vicinity of the lug plate of the pile positioning component 4, the lowering is stopped. Construction workers then disconnect the second connection end 10 of the inner platform's wire rope from the submarine cable support and disconnect the shackle 6 of the steel pipe pile's wire rope from the pile fixing component 4, connecting it to the second connection end 10 of the inner platform's wire rope. Figure 3 As shown.

[0048] After the connection is completed, place the shackle 6 and the steel pipe pile wire rope under the inner platform, and continue to slowly lower the inner platform onto the support plate 3. Connect the inner platform and the support plate 3 with screws, thus realizing the connection of the wire rope through the inner platform through hole 11 to the submarine cable support 13 and the outside of the pile. Figure 4 As shown, after the steel pipe pile wire rope external connection end 2 is detached from the external fixing component 15, it is connected to the submarine cable. The submarine cable pile body can be entered by pulling the steel pipe pile wire rope through the first connection end 9 of the inner platform wire rope.

[0049] In summary, this embodiment utilizes a positioning and connecting mechanism to fix the steel pipe pile wire rope to the pile foundation. After pile driving is completed, the inner platform is hoisted to the top of the support plate 3 using the inner platform lifting lugs and connecting lifting equipment. The inner connection end 7 of the steel pipe pile wire rope is connected to the second connection end 10 of the inner platform wire rope. The connection between the steel pipe pile wire rope and the inner platform wire rope is located below the inner platform. The inner platform is then lowered onto the support plate 3 and connected to the support plate 3 of the pile foundation using screws. The outer connection end of the steel pipe pile wire rope is connected to the submarine cable. The submarine cable is then pulled through the fixed end 9 of the inner platform wire rope to guide the steel pipe pile into the pile body. In the above embodiments, by installing the pile fixing assembly above the support plate and connecting the pile foundation and the inner platform with the first and second traction ropes respectively, construction personnel can easily connect the steel pipe pile wire rope and the inner platform wire rope before the inner platform is lowered into place. The connection point of the two wire ropes is placed below the inner platform, forming a support-inner platform through-pile wall through-submarine cable traction path, significantly improving construction efficiency.

[0050] The above description is merely a preferred embodiment of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel pipe pile, characterized in that, It includes a pile foundation and an inner platform; the pile foundation includes a steel pipe pile wall and a support plate (3) installed on the inner surface of the steel pipe pile wall, the support plate (3) being used to adapt and connect the inner platform; The steel pipe pile wall is equipped with a positioning connection mechanism for connecting the first traction rope (1); the positioning connection mechanism includes a pile fixing component (4) for connecting one end of the first traction rope (1), and the steel pipe pile wall is provided with a pile body through hole (5) for the first traction rope (1) or submarine cable to pass through; the pile fixing component (4) is installed on the side of the support plate (3) near the top of the steel pipe pile. The inner platform is provided with an inner platform through hole (11) for the second traction rope (8) or submarine cable to pass through, and the inner platform is provided with a bracket (13) for connecting the second traction rope (8); the second traction rope (8) includes a first connecting end (9) connected to the bracket (13) for pulling the submarine cable pile body inlet and a second connecting end (10) for adapting to connect the first traction rope and the bracket.

2. The steel pipe pile according to claim 1, characterized in that, The first traction rope (1) has a sleeve structure installed at both the inner connection end (7) and the outer connection end (2) of the pile. The sleeve structure is connected to the positioning connection mechanism by a shackle (6).

3. The steel pipe pile according to claim 1, characterized in that, The positioning and connection mechanism also includes an external pile fixing component (15), which is installed on the outer surface of the steel pipe pile wall; Both the internal pile fixing component (4) and the external pile fixing component (15) use ear plates, and the two ends of the first traction rope (1) are detachably connected to the ear plates of the internal pile fixing component (4) and the external pile fixing component (15).

4. The steel pipe pile according to claim 3, characterized in that, The through hole (5) of the pile body is set at the bottom of the pile wall of the steel pipe pile, and the external fixing component (15) of the pile body is installed at the edge of the through hole (5).

5. The steel pipe pile according to claim 1, characterized in that, The inner platform surface is evenly arranged with multiple inner platform lifting lugs (12) along the circumferential direction. The inner platform lifting lugs (12) are used to adapt to the hoisting of the inner platform.

6. The steel pipe pile according to claim 1, characterized in that, With the first connecting end (9) and the second connecting end (10) of the second traction rope (8) both connected to the bracket (13), the middle part of the second traction rope (8) passes through the inner platform through hole (11) and wraps around the edge of the inner platform.

7. The steel pipe pile according to claim 6, characterized in that, The second connecting end (10) and the first connecting end (9) of the second traction rope (8) both adopt a sleeve structure, and the first connecting end (9) of the second traction rope (8) is connected to the bracket (13) through the sleeve structure.

8. The steel pipe pile according to claim 1, characterized in that, The inner platform has screw holes (14) on its edge for connecting to the support plate, and the inner platform is connected to the support plate (3) by screws.

9. A method for introducing submarine cable into the steel pipe pile according to any one of claims 1 to 8, characterized in that, The method includes the following steps: The first traction rope is fixedly connected to the pile foundation using a positioning and connecting mechanism. After the pile driving is completed, the inner platform is hoisted to the top of the support plate using a lifting device. The pile inner connection end of the first traction rope is connected to the second connection end of the second traction rope. The connection between the first and second traction ropes is placed below the inner platform. The inner platform is then lowered onto the support plate and fixedly connected to the support plate of the pile foundation. The pile outer connection end of the first traction rope is connected to the submarine cable. The submarine cable is then pulled through the first connection end of the second traction rope to guide the steel pipe pile into the pile body.

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