Transportation and hoisting method and device for offshore wind turbine foundation pile

Abstract

The invention relates to a transporting and hoisting method and device for offshore wind turbine foundation piles, which is characterized in that the pile bottoms of the lower foundation piles exceed the diameter of the pile bottoms of the upper foundation piles in a stacking manner, and an independent rotating space is reserved for each layer of foundation piles. The limiting assembly comprises a first limiting part, a second limiting part and a connecting part, the first limiting part is cushioned between the upper foundation pile and the lower foundation pile, the second limiting part is cushioned below the lower foundation pile, the connecting part is arranged between the adjacent lower foundation piles, the limiting assembly can be matched with the foundation piles of different lengths, the position can be flexibly adjusted, rapid disassembly and assembly are convenient, and meanwhile the effective space of a deck is not additionally occupied. Due to the fact that the second limiting part is pressed below the lower foundation pile, the first limiting part and the second limiting part are stabilized at the pile bottom position of the upper foundation pile through the connecting part, when the foundation pile is hoisted, the first limiting part is used as a stable rotating support, and a fixing fulcrum does not need to be independently preset. According to the transporting and hoisting method and device, transportation of the multiple layers of foundation piles is convenient to expand, and the transporting and hoisting process is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore wind power, in particular to a transportation and hoisting method and device for offshore wind turbine foundation piles. BACKGROUND

[0002] In recent years, the offshore wind power industry has developed rapidly, and its development focus is gradually shifting from the nearshore coastal area to the deep sea area. Compared with the nearshore coastal area, the deep sea area has the characteristics of long distance from the shore, greater water depth, more severe weather conditions, and more complex geological environment, which puts higher requirements on various technologies for offshore wind power foundation construction. During offshore wind power foundation construction, the transportation of foundation piles is one of the key links. Due to the long distance from the shore in the deep sea area, the transportation distance is greatly increased, and the existing construction method usually uses single-layer transportation of foundation piles, which not only seriously affects the overall construction progress, but also significantly increases the construction cost.

[0003] To solve the problems of single-layer transportation, related technologies such as patent application CN118495432A disclose a four-pile jacket foundation steel pipe pile tail turning method, which realizes two-layer transportation and storage of steel pipe piles by setting devices such as bottom plates, saddles, low longitudinal stops, high longitudinal stops, spacer blocks, and turning blocks on the deck of the transport ship, effectively improving transportation efficiency.

[0004] However, the arrangement of two layers of steel pipe piles not only solves the problem of transportation efficiency, but also brings the problem of difficult hoisting and turning of steel pipe piles. Based on this, the above-mentioned patent application CN118495432A also discloses a hydraulic pile turner, which sets slide rod groups and rotating block groups on the low longitudinal stop and the high longitudinal stop, respectively, corresponding to the lower and upper pipe piles, so that the pipe piles are always connected with the longitudinal stop, allowing the freedom required for pipe pile turning, adjusting the arm frame amplitude by the large arm of the construction ship, and realizing the turning of the pipe pile under the condition that the pile bottom support point remains unchanged.

[0005] Although the above-mentioned prior art solution improves the transportation and turning of two layers of steel pipe piles, it has poor adaptability and cannot flexibly adapt to the transportation and hoisting and turning operation of more layers of steel pipe piles. Therefore, it is urgent to develop an efficient, stable, and highly adaptable multi-layer steel pipe pile transportation and hoisting and turning technology. SUMMARY

[0006] Therefore, it is necessary to provide a transportation and hoisting method and device for offshore wind turbine foundation piles in view of the above problems.

[0007] A transportation and hoisting method for offshore wind turbine foundation piles, the transportation and hoisting method comprising: The plurality of foundation piles are stacked on the transport ship so that the pile bottom of the foundation pile located below exceeds the pile bottom of the adjacent foundation pile located above by a preset distance, and the first limiting part of the limiting assembly is placed between the upper foundation pile and the lower foundation pile and at the pile bottom of the upper foundation pile, and the second limiting part of the limiting assembly is placed below the lower foundation pile, so that the connecting part connecting the first limiting part and the second limiting part is located between the two adjacent foundation piles below; wherein the preset distance is greater than or equal to the diameter of the foundation pile; The transport ship is controlled to sail to the vicinity of the construction site and anchor, and then a crane ship is docked on one side of the construction site; The hoisting device of the crane ship connected with the pile lifter is controlled to move, so that the pile lifter is aligned with the pile top position of the foundation pile, and then the pile lifter is connected at the pile top position of the foundation pile located at the top layer; The hoisting device is controlled to rotate towards the pile bottom of the foundation pile and adjust the luffing to gradually lift the pile top of the foundation pile, until the foundation pile is completely vertical, and then the foundation pile is lifted.

[0008] In one of the embodiments, the plurality of foundation piles are stacked on the transport ship, comprising: A layer of foundation piles is placed on the saddle of the deck of the transport ship to form a first layer of foundation piles, each foundation pile is arranged at intervals, and the distance between each foundation pile is less than the radius of the foundation pile; a foundation pile is placed above each of the two adjacent foundation piles of the first layer of foundation piles to form a second layer of foundation piles; a foundation pile is placed above each of the two adjacent foundation piles of the second layer of foundation piles to form a third layer of foundation piles.

[0009] In one of the embodiments, the plurality of foundation piles are stacked on the transport ship, further comprising: the pile top of each foundation pile faces the bow of the transport ship, and the pile bottom of each foundation pile is located at the stern of the transport ship.

[0010] In one of the embodiments, after the pile lifter is aligned with the pile top position of the foundation pile, the pile lifter is connected at the pile top position of the foundation pile located at the top layer, comprising: The horizontal lifting point wire rope connected to the hoisting device is adjusted to adjust the pile lifter to be in a horizontal state, and the pile lifter is controlled to move to a position opposite the pile top of the top layer of foundation piles; The traction rope of the winch located at the stern of the transport ship is passed through the top layer of foundation piles to the pile top; After the traction rope is connected to the bottom of the pile lifter, the winch is controlled to pull the pile lifter into the inside of the pile top position of the foundation pile through the traction rope; After the pile lifter clamps the foundation pile, the horizontal lifting point wire rope of the pile lifter is released.

[0011] In one of the embodiments, after the transport ship is controlled to sail to the vicinity of the construction site and anchor, and then the crane ship is docked on one side of the construction site, it further comprises: Control the crane vessel to navigate to the vicinity of the construction site, start the DP power system to adjust the direction of the crane vessel so that the length of the crane vessel is parallel to the direction of the water flow at the construction site. The crane vessel hoists the pile stabilization platform to the center of the construction site, and then lowers the pile stabilization platform onto the mud surface according to the preset construction position coordinates. The auxiliary piles of the pile stabilization platform are driven into the mud surface by a vibratory hammer to fix the position of the pile stabilization platform. After the foundation piles are completely vertical, the process includes lifting the foundation piles, followed by: The crane vessel controls the lifting device to lift the foundation pile to the top of the guide tube of the pile stabilization platform, and slowly lowers the foundation pile into the guide tube until the foundation pile sinks to the preset insertion depth. After installing the pile driver on the foundation pile, the hydraulic hammer is placed above the pile driver, and the pile is driven until the foundation pile is driven to the design elevation. After all the foundation piles have been driven, the auxiliary piles of the stabilizing platform are pulled out of the mud surface, and the crane is used to lift the stabilizing platform off the mud surface, thus completing the dismantling of the stabilizing platform.

[0012] A transport and hoisting device for offshore wind turbine foundation piles includes a transport vessel and a limiting assembly. The transport vessel is used to place and transport multi-layer foundation piles. The limiting assembly includes a first limiting part, a second limiting part, and a connecting part. One end of the connecting part is connected to the first limiting part, and the other end is connected to the second limiting part. The first limiting part is used to place between the upper foundation pile and the lower foundation pile and is located at the bottom of the upper foundation pile. The second limiting part is used to place under the lower foundation pile. The connecting part is disposed between two adjacent foundation piles located below. The first limiting part is made of a soft material.

[0013] In one embodiment, there are two second limiting parts, which are respectively connected to both sides of the other end of the connecting part, and are respectively used to pad under two adjacent foundation piles located below; both the first limiting part and the second limiting part are made of rubber. Alternatively, there may be multiple first limiting parts and multiple second limiting parts, and the number of connecting parts may be the same as the number of first limiting parts. Each connecting part may be connected to a first limiting part, and two adjacent first limiting parts may be connected to the two sides of the same second limiting part through their respective connecting parts, so that each second limiting part may be connected in series through the connecting parts.

[0014] In one embodiment, the transport hoisting device further includes a saddle, which is mounted on the deck of the transport vessel. The saddle includes a first support, a second support, and a support portion. The first and second support are spaced apart along the length of the foundation pile. The support portion is located between the first and second support and is connected to the first and second support at both ends. A second limiting portion can be placed on the support portion, and both ends of the second limiting portion abut against the first and second support. The lowest foundation pile is placed on the first support, the second support, and the second limiting portion.

[0015] In one embodiment, the transport and hoisting device further includes a thrust pad. For the foundation pile of the intermediate layer, the first limiting part of the lower limiting component is placed at the bottom of the foundation pile, and the second limiting part of the upper limiting component is placed under the foundation pile and spaced apart from the first limiting part of the lower limiting component. The thrust pad is placed under the foundation pile and is located between the first limiting part of the lower limiting component and the second limiting part of the upper limiting component, and the two ends of the thrust pad abut against the first limiting part and the second limiting part, respectively.

[0016] In one embodiment, the transport hoisting device further includes a side thrust bracket and a stop bracket, the stop bracket being installed on the deck of the transport vessel and located at the bottom of the foundation pile, and the height of the stop bracket being less than the diameter of the foundation pile; the number of side thrust brackets is at least two sets, both sets of side thrust brackets being installed on the deck of the transport vessel and located on both sides of the bottom foundation pile respectively.

[0017] In one embodiment, the transport and hoisting device further includes a locking assembly, which includes a locking rope, locking buckles, and a locking member. The number of locking buckles is at least two sets, and the two sets of locking buckles are respectively disposed on both sides of the foundation pile. The two ends of the locking rope pass over the stacked foundation piles and are respectively connected to the two sets of locking buckles. The locking member is disposed on the locking rope and is used to tighten the locking rope so that the locking rope is pressed against the foundation pile.

[0018] In one embodiment, the transport hoisting device further includes a winch located at the stern of the transport vessel, the winch having a traction rope that can pass through the space within the foundation pile to pull a pile driver located at the top of the foundation pile into the foundation pile.

[0019] The above-mentioned method and apparatus for transporting and hoisting offshore wind turbine foundation piles have at least the following advantages over existing technologies: By arranging the lower foundation piles with a diameter exceeding that of the upper foundation piles, and using limiting components, independent rotation space is reserved for each layer of foundation piles. This allows for multi-layer transportation up to three or more layers, increasing the amount of foundation piles that can be transported on the deck of a transport ship. Furthermore, because the rotation space is ample, the lower piles will not be squeezed to one side, thus maintaining the stability of the lower pile setup. The limiting assembly consists of only three core components. During installation, the first limiting part is placed between the upper and lower foundation piles, the second limiting part is placed under the lower foundation pile, and the connecting part is placed between adjacent lower foundation piles. Firstly, the limiting assembly can be directly placed between foundation piles, accommodating piles of different lengths and diameters. Its position can be flexibly adjusted according to the foundation pile, facilitating quick assembly and disassembly with low disassembly and maintenance costs. Secondly, it does not occupy additional deck space, is easy to operate, and does not require high-precision fitting. Furthermore, because the second limiting part is pressed under the lower foundation pile, the first limiting part is stabilized at the bottom of the upper foundation pile through the connecting part. After the pile driver connects to the foundation pile, the foundation pile can be lifted by rotating and varying the amplitude of the lifting device towards the pile bottom. Utilizing the first limiting part as a stable rotational support, there is no need for a separately preset fixed support point. The center of gravity of the foundation pile gradually shifts, making the lifting process smoother. The above-mentioned method and device for transporting and lifting offshore wind turbine foundation piles is simple in its transport and lifting process, easily expandable to the transport of multi-layer foundation piles, and can effectively improve the layout density and transport efficiency of foundation piles. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown in the drawings only as examples and not necessarily to actual scale.

[0023] Figure 1 This is a side view of a transport and hoisting device for offshore wind turbine foundation piles in one embodiment.

[0024] Figure 2 for Figure 1 The side view of the transport and hoisting device shown is omitted.

[0025] Figure 3 for Figure 2The front view of the transport and hoisting device is shown.

[0026] Figure 4 for Figure 2 A schematic diagram of the limiting components and saddle in the middle.

[0027] Figure 5 for Figure 4 A schematic diagram of the limiting component in the diagram.

[0028] Figure 6 for Figure 4 A schematic diagram of the saddle structure.

[0029] Figure 7 This is a schematic diagram of the limiting component in another embodiment.

[0030] Figure 8 for Figure 3 Enlarged view of point A in the image.

[0031] Figure 9 This is a schematic diagram of the structure of the crane vessel hoisting the pile stabilizing platform in one embodiment.

[0032] Figure 10 This is a top view of a transport ship docked in one embodiment.

[0033] Figure 11 This is a partial structural diagram of lifting the upper foundation pile in one embodiment.

[0034] Figure 12 This is a partial structural diagram of lifting the foundation piles in one embodiment.

[0035] Figure 13 This is a schematic diagram of the structure for installing foundation piles on a crane vessel in one embodiment.

[0036] Figure 14 This is a schematic diagram of the structure of a crane ship driving a pile in one embodiment.

[0037] Explanation of reference numerals in the attached figures: Transport and hoisting device 10; transport vessel 100; limiting component 200; first limiting part 210; first arc groove 212; second limiting part 220; second arc groove 222; connecting part 230; thrust block 240; saddle 300; first support seat 310; second support seat 320; support part 330; thrust pad 400; side thrust bracket 500; stop bracket 600; locking component 700; locking rope 710; locking buckle 720; locking element 730; crane vessel 20; pile stabilizing platform 30; foundation pile 40; pile driver 50; pile feeder 60; hydraulic hammer 70. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] See Figures 1 to 3 The transport and hoisting device 10 for offshore wind turbine foundation piles 40 in one embodiment of this application can at least improve transport efficiency and facilitate the hoisting of the foundation piles 40. Specifically, the transport and hoisting device 10 includes a transport vessel 100 and a limiting component 200. The transport vessel 100 is used to place and transport the multi-layer foundation piles 40; the limiting component 200 is disposed between the multi-layer foundation piles 40 to facilitate the hoisting of the foundation piles 40.

[0040] Further reading Figures 4 to 7 In one embodiment, the limiting component 200 includes a first limiting part 210, a second limiting part 220, and a connecting part 230. One end of the connecting part 230 is connected to the first limiting part 210, and the other end is connected to the second limiting part 220. The first limiting part 210 is used to sit between the upper foundation pile 40 and the lower foundation pile 40 and is located at the bottom of the upper foundation pile 40. The second limiting part 220 is used to sit under the lower foundation pile 40. The connecting part 230 is disposed between two adjacent foundation piles 40 located below.

[0041] Traditional technical solutions are only suitable for placing a maximum of two layers of pipe piles. Each pipe pile in both layers requires a longitudinal bar on the deck as a transport limit and rotation support during pile lifting, which occupies a large amount of deck space and has high component complexity. If the number of transport layers is increased, the height and position of the longitudinal bars and other related accessories need to be redesigned. Since the longitudinal bars are fixed on the deck, their scalability is poor. At the same time, when the upper layer of piles is turned over, it will generate lateral compressive stress on the lower layer of piles, which may lead to displacement or local damage to the lower layer of piles.

[0042] The limiting component 200 described in this application has only three core components. During installation, the first limiting part 210 is placed between the upper and lower foundation piles 40, the second limiting part 220 is placed under the lower foundation pile 40, and the connecting part 230 is placed between adjacent lower foundation piles 40. On the one hand, the limiting component 200 can be directly placed between the foundation piles 40, which can match foundation piles 40 of different lengths and diameters. Its position can be flexibly adjusted according to the foundation piles 40, which is convenient for quick assembly and disassembly, and has low disassembly and maintenance costs. On the other hand, it does not occupy any additional deck space. The operation is convenient and does not require high-precision matching. On the other hand, since the second limiting part 220 is pressed under the lower foundation pile 40, the first limiting part 210 is stabilized at the bottom of the upper foundation pile 40 through the connecting part 230 and the second limiting part 220. After the pile lifter 50 is connected to the foundation pile 40, the foundation pile 40 can be lifted by rotating and changing the amplitude of the lifting device towards the pile bottom. Using the first limiting part 210 as a stable rotation support, there is no need to preset a fixed support point. The center of gravity of the foundation pile 40 gradually shifts, and the lifting process is more stable.

[0043] In this embodiment, a first layer of foundation piles 40 is formed by placing a layer of foundation piles 40 on the deck of the transport ship 100. The foundation piles 40 are spaced apart, and the distance between each foundation pile 40 is less than the radius of the foundation pile 40. A second layer of foundation piles 40 is formed by placing a foundation pile 40 above every two adjacent foundation piles 40 in the first layer of foundation piles 40. A third layer of foundation piles 40 is formed by placing a foundation pile 40 above every two adjacent foundation piles 40 in the second layer of foundation piles 40. In other embodiments, four or more layers of foundation piles 40 may be placed.

[0044] In this embodiment, there are two second limiting parts 220. The two second limiting parts 220 are respectively connected to both sides of the other end of the connecting part 230. The two second limiting parts 220 are used to support the two adjacent foundation piles 40 located below. By providing two second limiting parts 220, when each foundation pile 40 on the first limiting part 210 is lifted, the first limiting part 210, acting as a rotational support, can be limited by the two second limiting parts 220 pressed against the lower foundation pile 40 when subjected to lateral thrust. This stabilizes the position of the first limiting part 210 and prevents the foundation pile 40 from sliding relative to the lower foundation pile 40 during lifting, thus avoiding a safety accident. When there are two second limiting parts 220, two adjacent second limiting parts 220 of the two limiting components 200 can be placed under the lower foundation pile 40 located in the middle of the first floor. Of course, in other embodiments, there can also be only one second limiting part 220, located on one side of the connecting part 230. A second limiting part 220 is placed under the foundation pile 40 below.

[0045] In another embodiment, there are multiple first limiting parts 210 and multiple second limiting parts 220, and the number of connecting parts 230 is the same as the number of first limiting parts 210. Each connecting part 230 is connected to a first limiting part 210. Two adjacent first limiting parts 210 are connected to the two sides of the same second limiting part 220 through their respective connecting parts 230, so that each second limiting part 220 is connected in series through the connecting parts 230. The number of second limiting parts 220 can match the number of foundation piles 40 to be supported.

[0046] Specifically, the first limiting part 210 has a first arc-shaped groove 212 for placing the foundation pile 40, and a thrust block 240 is provided at one end of the first limiting part 210, which can abut against the bottom of the foundation pile 40. By providing the first arc-shaped groove 212, it can better fit against the outer wall of the foundation pile 40. When the foundation pile 40 is lifted, the bottom of the pile can abut against the thrust block 240, preventing the bottom of the foundation pile 40 from sliding during the lifting process.

[0047] Specifically, a second arc-shaped groove 222 for placing the foundation pile 40 is formed on the second limiting part 220. The second arc-shaped groove 222 can better fit the outer wall of the foundation pile 40, thereby improving the stability of the foundation pile 40 pressing on the second limiting part 220.

[0048] In this embodiment, the first limiting part 210 is made of a soft material. Specifically, the first limiting part 210 and the second limiting part 220 are both made of rubber. Since both the first limiting part 210 and the second limiting part 220 are made of rubber, on the one hand, the friction during the transportation and lifting of the foundation pile 40 is increased, protecting the integrity of the foundation pile 40 during transportation and lifting; on the other hand, when lifting the lower foundation pile 40, the first limiting part 210, being made of a soft material, prevents the first limiting part 210 from restricting the upward rotation of the foundation pile 40. In this embodiment, the connecting part 230 is made of a hard material, which improves the reliability and stability of the connection between the first limiting part 210 and the second limiting part 220, and reduces the possibility of the first limiting part 210 sliding relative to the second limiting part 220 when subjected to thrust. Of course, in other embodiments, the limiting component 200 can be a one-piece molded structure, all made of rubber.

[0049] like Figure 2 , Figure 4 and Figure 6As shown, in one embodiment, the transport hoisting device 10 further includes a saddle 300, which is disposed on the deck of the transport ship 100. The saddle 300 includes a first support 310, a second support 320, and a support portion 330. The first support 310 and the second support 320 are spaced apart along the length of the foundation pile 40. The support portion 330 is located between the first support 310 and the second support 320, and both ends of the support portion 330 are respectively connected to the first support 310 and the second support 320. A second limiting portion 220 can be placed on the support portion 330, and both ends of the second limiting portion 220 abut against the first support 310 and the second support 320, respectively. The foundation pile 40 located at the lowest layer is placed on the first support 310, the second support 320, and the second limiting portion 220. The saddle 300 facilitates the positioning of the lowest foundation pile 40, and the structure of the first support 310, the second support 320 and the support part 330 facilitates the positioning of the second limiting part 220 of the lower limiting component 200, so that the foundation pile 40 is stably pressed on the second limiting part 220 and the sliding of the second limiting part 220 and the limiting component 200 is prevented.

[0050] Specifically, a limiting space is formed between the support portion 330 and the first support base 310 and the second support base 320, and the second limiting portion 220 is located within the limiting space. Both the first support base 310 and the second support base 320 have arc-shaped limiting grooves to facilitate the support and placement of the foundation piles 40. In this embodiment, each foundation pile 40 located at the bottom layer is correspondingly provided with multiple saddles 300, which are spaced apart along the length of the foundation pile 40. Providing multiple saddles 300 improves the stability of the foundation piles 40. Furthermore, the saddles 300 can be welded to the deck of the transport ship 100.

[0051] like Figure 3 and Figure 8As shown, in one embodiment, the transport and hoisting device 10 further includes a thrust pad 400. For the foundation pile 40 of the intermediate layer, the first limiting part 210 of the lower limiting component 200 is placed at the bottom of the foundation pile 40, and the second limiting part 220 of the upper limiting component 200 is placed under the foundation pile 40 and spaced apart from the first limiting part 210 of the lower limiting component 200. The thrust pad 400 is placed under the foundation pile 40 and between the first limiting part 210 of the lower limiting component 200 and the second limiting part 220 of the upper limiting component 200, and the two ends of the thrust pad 400 abut against the first limiting part 210 and the second limiting part 220, respectively. Since the distance between the bottoms of two adjacent foundation piles 40 is greater than or equal to the diameter of the foundation piles 40, a horizontal gap exists between the upper and lower limiting components 200. The length of the thrust pad 400 matches the horizontal gap between the two limiting components 200 to limit the horizontal displacement of the upper limiting component 200. Specifically, the thrust pad 400 can be an arc-shaped plate; in other embodiments, the thrust pad 400 may be omitted. like Figures 1 to 3 As shown, in one embodiment, the transport and hoisting device 10 further includes a side-push support 500 and a stop support 600. The stop support 600 is installed on the deck of the transport vessel 100 and located at the bottom of the foundation pile 40. The height of the stop support 600 is less than the diameter of the foundation pile 40. There are at least two sets of side-push supports 500, both installed on the deck of the transport vessel 100 and located on either side of the bottom foundation pile 40. The side-push supports 500 improve the transport stability of the multi-layer foundation pile 40 and prevent lateral rolling of the foundation pile 40. The stop support 600 provides rotational support for the bottom foundation pile 40, preventing it from sliding during rotation.

[0052] In one embodiment, the transport and hoisting device 10 further includes a locking assembly 700, which includes a locking rope 710, locking buckles 720, and a locking member 730. There are at least two sets of locking buckles 720, each set positioned on one side of the foundation pile 40. The two ends of the locking rope 710 pass over the stacked foundation piles 40 and are connected to the two sets of locking buckles 720. The locking member 730 is positioned on the locking rope 710 and is used to tighten the locking rope 710, pressing it firmly against the foundation pile 40. The two sets of locking buckles 720, each positioned on one side of the foundation pile 40, connect the locking rope 710 after passing over all the stacked foundation piles 40, and, in conjunction with the locking member 730, tighten it, forming a ring-shaped constraint band on the transverse cross-section of the multi-layered foundation piles 40. This binds the multi-layered foundation piles 40 together as a whole, preventing lateral movement and relative slippage between layers of the foundation piles 40 during transport.

[0053] Specifically, there are two locking components 730, which are respectively located near both ends of the locking rope 710. The locking components 730 can adjust the tension of the locking rope 710 in real time according to the sea conditions, ensuring that the multi-layer foundation pile 40 always maintains a stable overall posture, and is suitable for long-distance transportation in complex sea conditions in deep sea.

[0054] In one embodiment, the transport and hoisting device 10 further includes a winch mounted on the stern of the transport vessel 100. The winch's traction rope can pass through the space within the foundation pile 40 to pull the pile driver 50, located at the top of the foundation pile 40, into the foundation pile 40. Using the winch facilitates pulling the pile driver 50 into the foundation pile 40 during hoisting, thereby improving the stability and efficiency of the pile driver 50's connection to the foundation pile 40.

[0055] In one embodiment, this application also describes a method for transporting and hoisting an offshore wind turbine foundation pile 40, implemented using the transport and hoisting device 10 from any of the above embodiments. Specifically, the transport and hoisting method includes: Step S1: Install the pile stabilization platform 30.

[0056] like Figure 9 As shown, specifically, the crane vessel 20 is controlled to sail to the vicinity of the construction site, and the DP power system is activated to adjust the direction of the crane vessel 20 so that the length of the crane vessel 20 is parallel to the direction of the water flow at the construction site; the crane vessel 20 hoists the pile stabilizing platform 30 to above the center of the construction site, and lowers the pile stabilizing platform 30 onto the mud surface according to the preset construction position coordinates; the auxiliary piles of the pile stabilizing platform 30 are vibrated and sunk into the mud surface by a vibratory hammer to fix the position of the pile stabilizing platform 30.

[0057] The pile stabilization platform 30 was hoisted as a whole using the main hook of the crane vessel 20. Based on the pre-set lifting points on the platform, a four-point horizontal hoisting method was employed, with one lifting sling at each point. The crane vessel 20 adjusted its boom to lift the pile stabilization platform 30 to near the center of the construction site. The platform's position was slowly adjusted by maneuvering the boom and moving the vessel. Then, the platform 30 was lowered to the mud surface. Surveyors installed positioning equipment on the platform 30. During the adjustment process, the orientation and flatness of the platform 30 were measured multiple times. Subsequently, a vibratory hammer was used to drive the four auxiliary piles of the platform 30 into the mud surface, thus completing the installation of the pile stabilization platform 30.

[0058] Step S2: Transport foundation piles 40 by transport ship 100.

[0059] like Figures 1 to 3Specifically, multiple foundation piles 40 are stacked on the transport ship 100, such that the bottom of the lower foundation pile 40 exceeds the bottom of the adjacent upper foundation pile 40 by a predetermined distance. A first limiting part 210 of the limiting component 200 is placed between the upper and lower foundation piles 40, located at the bottom of the upper foundation pile 40. A second limiting part 220 of the limiting component 200 is placed under the lower foundation pile 40, such that the connecting part 230 between the first and second limiting parts 210 is located between two adjacent lower foundation piles 40. The predetermined distance is greater than or equal to the diameter of the foundation pile 40. By arranging the lower foundation piles 40 with their bottoms exceeding the diameter of the upper foundation piles 40, and in conjunction with the limiting component 200, independent rotation space is reserved for each layer of foundation piles 40, allowing for multi-layer transport up to three or more layers, thus increasing the transport capacity of foundation piles 40 on the deck of the transport ship 100. Furthermore, due to the ample space for rotation, the lower foundation pile 40 will not be squeezed to one side, thus not affecting the stability of the lower foundation pile 40.

[0060] Furthermore, the method of stacking multiple foundation piles in 40 layers on the transport ship 100 includes: A first layer of foundation piles 40 is formed by placing a layer of foundation piles 40 on the saddle 300 of the deck of the transport ship 100. The foundation piles 40 are spaced apart, and the distance between each foundation pile 40 is less than the radius of the foundation pile 40. A foundation pile 40 is placed above each two adjacent foundation piles 40 of the first layer of foundation piles 40 to form a second layer of foundation piles 40. A foundation pile 40 is placed above each two adjacent foundation piles 40 of the second layer of foundation piles 40 to form a third layer of foundation piles 40.

[0061] In this embodiment, the top of each foundation pile 40 faces the bow, and the bottom of each foundation pile 40 is located at the stern. The foundation piles 40 are installed in three staggered layers, with the tops facing the living quarters, to prevent the bottoms of the foundation piles 40 from being unstable and impacting the living quarters when the piles overturn, thus reducing safety risks.

[0062] Step S3: Transport ship 100 arrives at its designated location.

[0063] like Figure 10 As shown, specifically, after the transport vessel 100 sails to the vicinity of the construction site and anchors, it is moored alongside the construction site by the crane vessel 20. In this embodiment, after the transport vessel 100 sails to the vicinity of the construction site, it anchors approximately 600m away from the construction site. After the transport vessel 100 anchors, the crane vessel 20 sails to the side of the transport vessel 100 and moors beside it via the DP system. The transport vessel 100 is located on the side of the crane vessel 20 facing away from the construction site.

[0064] Step S4: Lift foundation pile 40.

[0065] like Figure 2, Figure 3 , Figure 11 and Figure 12 As shown, specifically, the lifting device of the crane ship 20 connected to the pile driver 50 is controlled to move so that the pile driver 50 is aligned with the pile top position of the foundation pile 40, and then the pile driver 50 is connected to the pile top position of the foundation pile 40 located at the top layer. Control the lifting device to rotate towards the bottom of the foundation pile 40 and adjust the amplitude to gradually lift the top of the foundation pile 40 until the foundation pile 40 is completely vertical, then lift the foundation pile 40.

[0066] Furthermore, the pile driver 50 is adjusted to a horizontal state by adjusting the steel wire rope of the horizontal lifting point connected to the lifting device, and the pile driver 50 is moved to a position opposite to the top of the top foundation pile 40. The traction rope of the winch located at the stern of the transport ship 100 is threaded through the foundation pile 40 located at the top layer to the top of the pile. After connecting the traction rope to the bottom of the pile driver 50, control the winch to use the traction rope to fasten the pile driver 50 into the interior of the top position of the foundation pile 40. After starting the pile driver 50 to clamp the foundation pile 40, release the steel wire rope at the horizontal lifting point of the pile driver 50.

[0067] In this embodiment, after the pile driver 50 completes the pressure holding operation, the lifting device slowly lifts while its boom slowly rotates and adjusts its amplitude towards the pile bottom. For the upper foundation piles 40, such as the second and third foundation piles 40 in this embodiment, the friction of the first limiting part 210 of the limiting component 200 completes the turning of the foundation piles 40. For the bottom foundation piles 40, the turning is completed by the stop bracket 600 on the transport ship 100 until the foundation piles 40 are completely vertical, thus completing the turning of the foundation piles 40. Then, the foundation piles 40 are lifted. When the foundation piles 40 are completely vertical and leave the deck of the transport ship 100, the lifting and turning of the foundation piles 40 is completed.

[0068] Step S5: Install foundation piles 40.

[0069] like Figure 13 and Figure 14 As shown, specifically, the crane vessel 20 controls the lifting device to lift the foundation pile 40 above the guide tube of the pile stabilization platform 30, and slowly lowers the foundation pile 40 into the guide tube until the foundation pile 40 sinks to the preset insertion depth. After installing the pile driver 60 on the foundation pile 40, the hydraulic hammer 70 is placed above the pile driver 60, and the pile is driven until the foundation pile 40 is driven to the design elevation. After all the foundation piles 40 have been driven, the auxiliary piles of the stabilizing platform 30 are pulled out of the mud surface, and the crane vessel 20 lifts the stabilizing platform 30 away from the mud surface, thus completing the dismantling of the stabilizing platform 30.

[0070] In this embodiment, after the foundation pile 40 is lifted vertically, the crane vessel 20 rotates and lifts the foundation pile 40 above the guide tube of the pile stabilization platform 30. Using an underwater pile feeding process, the foundation pile 40 is slowly inserted into the guide tube. The insertion depth of the foundation pile 40 is determined by markings on the pile body until the foundation pile 40 sinks into place. The crane vessel 20 uses its main hook to lift the hydraulic hammer 70 and its auxiliary hook to lift the pile driver 60. The lifting device rotates its boom to directly above the foundation pile 40, and after installing the pile driver 60 on the foundation pile 40, the hydraulic hammer 70 is placed on top of the pile driver 60, and the hammering begins. During the pile driving process, the striking energy of the hydraulic hammer 70 is adjusted in a timely manner according to the penetration depth of the foundation pile 40 and geological data, until the pile reaches the required elevation. The remaining foundation piles 40 are then driven in sequence. After the pile driving is completed, a vibratory hammer is used to pull each auxiliary pile of the pile stabilization platform 30 out of the mud surface. Then, the main hook of the crane vessel 20 is lowered onto the pile stabilization platform 30. After the construction workers attach the slings of the four corners of the pile stabilization platform 30 to the main hook, the crane vessel 20 raises the main hook and lifts the pile stabilization platform 30 away from the mud surface, thus completing the dismantling of the pile stabilization platform 30.

[0071] The aforementioned method for transporting and hoisting offshore wind turbine foundation piles 40 employs a multi-layered stacking of foundation piles 40, with the use of limiting components 200 to achieve stable stacking of the multi-layered foundation piles 40. Simultaneously, the arrangement principle of the bottom diameter of the lower foundation piles 40 exceeding that of the upper foundation piles 40 ensures sufficient space for hoisting and turning the foundation piles 40, thereby increasing the transport capacity per voyage and reducing the number of voyages and sailing time in deep-sea projects. The upper and lower layers of foundation piles 40 form a stable support through the first limiting part 210, and the connecting part 230 limits the spacing between adjacent lower foundation piles 40. Furthermore, during the hoisting of the foundation piles 40, the first limiting part 210 provides rotational support, while the second limiting part 220 presses down on the lower foundation piles 40 to prevent slippage of the first limiting part 210, thus improving the stability and safety of hoisting the foundation piles 40. After the crane vessel 20 berths to one side of the construction site, the transport vessel 100 berths to one side of the crane vessel 20. The lifting device directly connects to the top of the top pile, eliminating the need to adjust the position of the foundation pile 40. The vertically erected foundation pile 40 is then lifted by the crane vessel 20 to the guide tube of the pile stabilization platform 30. The foundation pile 40 is then vertically lowered through the guide tube, completing the installation of the foundation pile 40. The above-mentioned transportation and lifting method and device for offshore wind turbine foundation piles 40 improves transportation efficiency, lifting safety, and pile driving accuracy. It is suitable for the construction needs of large-diameter, multi-layer foundation piles 40 in deep-sea areas, providing technical support for the efficient, safe, and economical advancement of offshore wind power.

[0072] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 this application.

[0073] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for transporting and hoisting foundation piles for offshore wind turbines, characterized in that, The transportation and hoisting method includes: Multiple foundation piles are stacked on the transport ship, such that the bottom of the lower foundation pile exceeds the bottom of the adjacent upper foundation pile by a predetermined distance. The first limiting part of the limiting component is placed between the upper and lower foundation piles and is located at the bottom of the upper foundation pile. The second limiting part of the limiting component is placed under the lower foundation pile, such that the connecting part between the first and second limiting parts is located between two adjacent lower foundation piles. The predetermined distance is greater than or equal to the diameter of the foundation pile. After controlling the transport ship to sail to the vicinity of the construction site and anchoring, the crane ship will moor to one side of the construction site. Control the movement of the lifting device of the crane ship connected to the pile driver so that the pile driver is aligned with the top of the foundation pile, and then connect the pile driver to the top of the foundation pile located at the top layer. Control the lifting device to rotate towards the bottom of the foundation pile and adjust the amplitude to gradually lift the top of the foundation pile until the foundation pile is completely vertical, then lift the foundation pile.

2. The transportation and hoisting method according to claim 1, characterized in that, The method of stacking multiple foundation piles on the transport ship includes: A layer of foundation piles is placed on the saddle of the transport ship deck to form the first layer of foundation piles. The foundation piles are spaced apart, and the distance between each foundation pile is less than the radius of the foundation pile. A foundation pile is placed above each of the two adjacent foundation piles of the first layer of foundation piles to form the second layer of foundation piles. A foundation pile is placed above each of the two adjacent foundation piles of the second layer of foundation piles to form the third layer of foundation piles.

3. The transportation and hoisting method according to claim 2, characterized in that, The method of stacking multiple foundation piles on the transport ship further includes: the top of each foundation pile faces the bow of the transport ship, and the bottom of each foundation pile is located at the stern of the transport ship.

4. The transportation and hoisting method according to claim 1, characterized in that, The step of aligning the pile driver with the top of the foundation pile and then connecting the pile driver to the top of the foundation pile at the top layer includes: Adjust the pile driver to a horizontal position by adjusting the steel wire rope at the horizontal lifting point connected to the lifting device, and control the movement of the pile driver to a position opposite to the top of the foundation pile. The traction rope of the winch located at the stern of the transport ship is threaded through the foundation pile located at the top layer to the top of the pile. After connecting the traction rope to the bottom of the pile driver, control the winch to use the traction rope to fasten the pile driver into the interior of the top position of the foundation pile. After the pile driver clamps the foundation piles, release the steel wire rope at the horizontal lifting point of the pile driver.

5. The transportation and hoisting method according to any one of claims 1-4, characterized in that, After the transport vessel sails to the vicinity of the aircraft position and anchors, it is then moored to one side of the aircraft position by a crane vessel. Prior to this, the process also includes: Control the crane vessel to navigate to the vicinity of the construction site, start the DP power system to adjust the direction of the crane vessel so that the length of the crane vessel is parallel to the direction of the water flow at the construction site. The crane vessel hoists the pile stabilization platform to the center of the construction site, and then lowers the pile stabilization platform onto the mud surface according to the preset construction position coordinates. The auxiliary piles of the pile stabilization platform are driven into the mud surface by a vibratory hammer to fix the position of the pile stabilization platform. After the foundation piles are completely vertical, the process includes lifting the foundation piles, followed by: The crane vessel controls the lifting device to lift the foundation pile to the top of the guide tube of the pile stabilization platform, and slowly lowers the foundation pile into the guide tube until the foundation pile sinks to the preset insertion depth. After installing the pile driver on the foundation pile, the hydraulic hammer is placed above the pile driver, and the pile is driven until the foundation pile is driven to the design elevation. After all the foundation piles have been driven, the auxiliary piles of the stabilizing platform are pulled out of the mud surface, and the crane is used to lift the stabilizing platform off the mud surface, thus completing the dismantling of the stabilizing platform.

6. A transport and hoisting device for offshore wind turbine foundation piles, characterized in that, The transport and hoisting device includes: Transport vessel, the transport vessel being used to place and transport multi-layer foundation piles; and A limiting component includes a first limiting part, a second limiting part, and a connecting part. One end of the connecting part is connected to the first limiting part, and the other end is connected to the second limiting part. The first limiting part is used to sit between the upper foundation pile and the lower foundation pile and is located at the bottom of the upper foundation pile. The second limiting part is used to sit under the lower foundation pile. The connecting part is disposed between two adjacent foundation piles located below. The first limiting part is made of soft material.

7. The transport and hoisting device according to claim 6, characterized in that, There are two second limiting parts, which are respectively connected to both sides of the other end of the connecting part, and are respectively used to pad under two adjacent foundation piles located below; both the first limiting part and the second limiting part are made of rubber. Alternatively, there may be multiple first limiting parts and multiple second limiting parts, and the number of connecting parts may be the same as the number of first limiting parts. Each connecting part may be connected to a first limiting part, and two adjacent first limiting parts may be connected to the two sides of the same second limiting part through their respective connecting parts, so that each second limiting part may be connected in series through the connecting parts.

8. The transport and hoisting device according to claim 6, characterized in that, The transport and hoisting device also includes a saddle, which is set on the deck of the transport ship. The saddle includes a first support, a second support, and a support portion. The first support and the second support are spaced apart along the length of the foundation pile. The support portion is located between the first support and the second support, and its two ends are respectively connected to the first support and the second support. The second limiting portion can be placed on the support portion, and its two ends abut against the first support and the second support. The foundation pile at the bottom layer is placed on the first support, the second support, and the second limiting portion.

9. The transport and hoisting device according to any one of claims 6-8, characterized in that, The transport and hoisting device also includes a thrust pad. For the foundation pile of the intermediate layer, the first limiting part of the lower limiting component is placed at the bottom of the foundation pile, and the second limiting part of the upper limiting component is placed under the foundation pile and spaced apart from the first limiting part of the lower limiting component. The thrust pad is placed under the foundation pile and is located between the first limiting part of the lower limiting component and the second limiting part of the upper limiting component, and the two ends of the thrust pad abut against the first limiting part and the second limiting part, respectively.

10. The transport and hoisting device according to any one of claims 6-8, characterized in that, The transport and hoisting device also includes a side thrust bracket and a stop bracket. The stop bracket is installed on the deck of the transport ship and located at the bottom of the foundation pile, and the height of the stop bracket is less than the diameter of the foundation pile. The number of side thrust brackets is at least two sets, and both sets of side thrust brackets are installed on the deck of the transport ship and located on both sides of the bottom foundation pile. And / or, the transport and hoisting device further includes a locking assembly, which includes a locking rope, locking buckles, and locking elements. The number of locking buckles is at least two sets, and the two sets of locking buckles are respectively disposed on both sides of the foundation pile. The two ends of the locking rope pass over the stacked foundation piles and are respectively connected to the two sets of locking buckles. The locking elements are disposed on the locking rope and are used to tighten the locking rope so that the locking rope is pressed against the foundation pile. And / or, the transport hoisting device also includes a winch located at the stern of the transport vessel, the winch having a traction rope that can pass through the space within the foundation pile to pull a pile driver located at the top of the foundation pile into the foundation pile.

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