Pile sinking method of single pile foundation and pile feeder assembly thereof

Abstract

The invention discloses a pile sinking method of a single pile foundation and a pile feeder assembly thereof, the pile feeder assembly comprises a variable-diameter pile feeder and a rigging platform, the diameter of the top of the variable-diameter pile feeder is smaller than that of the bottom, and the variable-diameter pile feeder can adapt to the diameter of a hydraulic hammer cap and the diameter of the pile top of the single pile foundation for hammering and pile sinking. When the variable-diameter pile feeding device is installed, the rigging platform can be lifted and installed to the top of the variable-diameter pile feeding device, lifting points are converted in the rigging platform by workers, and a sling is connected to an inner lifting lug of the variable-diameter pile feeding device. And then the variable-diameter pile feeder and the rigging platform are hoisted to the pile top of the single-pile foundation together, the worker conducts hoisting point conversion in the rigging platform again, the sling is connected to the rigging platform, and the rigging platform is hoisted away, so that the variable-diameter pile feeder is sleeved with a hydraulic hammer subsequently, and the construction efficiency is improved. The mounting of the variable-diameter pile feeder and the dismounting of the sling are completed in a manner of carrying out hoisting point conversion in the stable sling platform, so that the safety risk during the high-altitude dismounting of the sling is effectively reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of single pile foundation construction, and in particular to a pile sinking method for a single pile foundation and a pile driving device component thereof. Background Art

[0002] Monopile foundations are widely used due to their simple process and high construction efficiency. However, with the development of offshore wind power technology and the trend toward larger wind turbines, monopile foundations are also gradually becoming heavier and larger in diameter. The diameter of the top of a monopile has reached 9.5m, while the existing hydraulic hammer cap has a diameter of 7.5m and is not suitable for this diameter. This prevents the hydraulic hammer from being directly installed on the top of the monopile foundation. A pile driver assembly is urgently needed to accommodate the hydraulic hammer cap for hammering and sinking the pile. Furthermore, the hydraulic hammer pile driver requires the pre-removal of the pile driver's rigging, and removing the rigging at high altitudes also presents significant safety risks. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the purpose of the present invention is to provide a pile driver assembly that can well adapt to the hammer cap of the hydraulic hammer and the top diameter of the single pile foundation to hammer pile driving, and can reduce the safety risks when removing the lifting sling and improve construction efficiency.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: a pile driver assembly, including a variable diameter pile driver and a rigging platform, the top diameter of the variable diameter pile driver is smaller than the bottom diameter, the top of the variable diameter pile driver is provided with a mounting position, the top of the variable diameter pile driver is also provided with an inner lifting ear, and the rigging platform is provided with a platform lifting ear. The rigging platform can be lifted to the mounting position on the top of the variable diameter pile driver, and the lifting point can be switched between the platform lifting ear and the inner lifting ear.

[0005] Compared to the prior art, the present invention has the following advantages: the pile driver assembly includes a variable diameter pile driver with a larger bottom diameter to accommodate the diameter of the monopile foundation pile top, and a smaller top diameter to accommodate the hydraulic hammer cap. Therefore, the variable diameter pile driver can be used to precisely match the hydraulic hammer cap to the diameter of the monopile foundation pile top for hammering and sinking piles. Furthermore, the present pile driver assembly includes a mounting position at the top of the variable diameter pile driver to facilitate the stable installation of a rigging platform. When lifting the variable diameter pile driver, the rigging platform can be first hoisted and installed on the top of the variable diameter pile driver. A worker then switches the lifting point within the rigging platform and connects the rigging to the inner lifting lug of the variable diameter pile driver. The variable diameter pile driver, coupled to the rigging platform, is then hoisted to the monopile foundation pile top. A worker then switches the lifting point within the rigging platform again, connects the rigging to the rigging platform, and lifts the rigging platform away from the variable diameter pile driver to facilitate subsequent hydraulic hammer installation on the variable diameter pile driver. The use of this pile driver assembly can effectively solve the problem of mismatch between the hydraulic hammer cap and the top diameter of a large-diameter single pile foundation. At the same time, the installation of the variable-diameter pile driver and the removal of the sling can be completed by converting the lifting points within a stable rigging platform, effectively reducing the safety risks when removing the sling at high altitude and improving construction efficiency.

[0006] The present invention also discloses a pile sinking method for a single pile foundation, which uses the above-mentioned pile driver assembly to sink the pile. The pile sinking method comprises the following steps: Step S100: Single pile self-sinking; Step S200: A worker goes up to the rigging platform, connects the pile driver rigging to the platform lifting lugs of the rigging platform, and hoists the rigging platform to the installation position on the top of the variable diameter pile driver. The worker then removes the pile driver rigging from the platform lifting lugs and connects the pile driver rigging to the inner lifting lugs on the top of the variable diameter pile driver. The worker is then hoisted from the rigging platform to the deck of the crane vessel using a hoist cage. Step S300: The crane vessel hoists the variable diameter pile driver together with the rigging platform to the top of the monopile. After the variable diameter pile driver is aligned with the monopile, the variable diameter pile driver is lowered to the top of the monopile. Step S400: Use a hoist cage to hoist a worker to the rigging platform. The worker on the rigging platform removes the pile driver rigging from the inner lifting lug on the top of the reducer pile driver, and connects the pile driver rigging to the platform lifting lug of the rigging platform. Then, the rigging platform is hoisted to the deck of the crane vessel. Step S500, performing hammering and pile sinking construction; Step S600: hoist the hydraulic hammer and the variable diameter pile driver to the deck of the crane vessel.

[0007] The pile driving method of the present invention adopts the above-mentioned pile driver assembly, which can effectively solve the problem of mismatch between the hammer cap of the hydraulic hammer and the top diameter of the large-diameter single pile foundation. At the same time, the installation of the variable-diameter pile driver and the removal of the sling can be completed by converting the lifting points within a stable rigging platform, effectively reducing the safety risks when removing the sling at high altitude and improving the construction efficiency.

[0008] The above-mentioned method for sinking a single pile foundation, step S100 comprises the following steps: Step S110: The ship is in position; Step S120: installing a pile stabilizing platform; Step S130: The transport ship moves into position; Step S140: hoisting and sinking the single pile.

[0009] In the above-mentioned method for sinking a single pile foundation, step S110 includes the following steps: Step S111: After the crane vessel is towed by the tugboat to the wind farm site, it drops anchor and performs preliminary positioning according to the pre-calculated anchor point coordinates; Step S112: After the ship drops anchor, the crane vessel is accurately positioned near the designated position coordinates.

[0010] In the above-mentioned method for sinking a single pile foundation, step S120 includes the following steps: Step S121: hoist the pile stabilizing platform and wind the anchor to the vicinity of the center of the machine position, and lower the pile stabilizing platform to the mud surface; Step S122: sink the auxiliary piles of the pile stabilizing platform, and fix the pile stabilizing platform after the piles are sunk into place.

[0011] In the above-mentioned method for sinking a single pile foundation, step S140 includes the following steps: Step S141: hoisting the monopile. After the monopile is hoisted to a suitable height, the transport ship weighs anchor, removes the cable and sails away from the main operation ship. Step S142: After the transport ship leaves the berth, the monopile is put into the water; Step S143: erecting the monopile. After the monopile is erected, the monopile is sent into the pile gripper to start the self-sinking of the monopile.

[0012] In the above-mentioned method for sinking a single pile foundation, in step S143 , the verticality of the single pile is measured every 2 to 3 meters during the self-sinking process.

[0013] In the above-mentioned method for sinking a single pile foundation, in step S143 , after the single pile has sunk itself, it is left to stand still for a period of time to observe whether the single pile has sunk itself to a stable state.

[0014] The above-mentioned method for sinking a single pile foundation, step S500 comprises the following steps: Step S510: Hang the hydraulic hammer wire rope onto the main hook of the crane ship; Step S520: Start the hydraulic hammer to hammer and sink the pile.

[0015] In the above-mentioned method of sinking a single pile foundation, in step S520, first tap with small energy to check whether the verticality meets the requirements. If the verticality exceeds the allowable error range, the verticality of the single pile is adjusted by the pile stabilization platform jack. After the pile body adjustment is completed and there is no change, the pile is continued to be sunk. The pile is observed and adjusted every 3m~4m until the single pile is sunk to the design elevation.

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the pile driver assembly according to the first embodiment of the present invention; Figure 2 This is a front view of the rigging platform in the pile driver assembly according to the first embodiment of the present invention; Figure 3 A top view of the rigging platform in the pile driver assembly according to the first embodiment of the present invention; Figure 4 This is a schematic diagram of a ship in position during the pile sinking method step according to the second embodiment of the present invention; Figure 5 This is a schematic diagram of the installation of a pile stabilizing platform in the pile sinking method according to the second embodiment of the present invention; Figure 6 Schematic diagram of a single pile self-sinking in the pile sinking method according to the second embodiment of the present invention; Figure 7 This is a schematic diagram of the process of lifting the rigging platform to the top of the variable diameter pile driver in the pile driving method according to the second embodiment of the present invention; Figure 8 This is a schematic diagram of the process of installing the sling platform to the top mounting position of the variable diameter pile driver in the pile driving method according to the second embodiment of the present invention; Figure 9 This is a schematic diagram of the process of lifting the pile driver assembly to the top of the single pile foundation in the pile driving method according to the second embodiment of the present invention; Figure 10 Schematic diagram of the pile sinking process by hammering in the pile sinking method according to the second embodiment of the present invention; Figure 11 This is a schematic diagram of the pile driver assembly being hoisted and recovered in the pile driving method according to the second embodiment of the present invention.

[0018] Explanation of the accompanying figures: 100 pile driver assembly, 110 variable diameter pile driver, 111 mounting position, 112 inner lifting eye, 113 outer lifting eye, 120 rigging platform, 121 platform lifting eye, 122 crossbeam, 200 pile stabilizing platform, 210 auxiliary pile, 300 single pile, 400 hydraulic hammer. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below: Example 1 Reference Figures 1 to 3 The first embodiment of the present invention provides a pile driver assembly 100, comprising a variable diameter pile driver 110 and a rigging platform 120. The top diameter of the variable diameter pile driver 110 is smaller than the bottom diameter, with the bottom diameter being 9.5 m and the top diameter being 7.5 m, so as to be compatible with the top of a single pile foundation and the hammer cap of a hydraulic hammer 400. The top of the variable diameter pile driver 110 is provided with a mounting position 111 for mounting the rigging platform 120. The top of the variable diameter pile driver 110 is also provided with an inner lifting lug 112 to facilitate switching of lifting points at high altitudes. The bottom of the variable diameter pile driver 110 is provided with an outer lifting lug 113 to facilitate transport of the variable diameter pile driver 110. The rigging platform 120 has four crossbeams 122 distributed along the circumference of the rigging platform 120 to facilitate mounting on the top of the variable diameter pile driver 110. The bottom of the rigging platform 120 is provided with four platform lifting lugs 121 for lifting the rigging platform 120. When the rigging platform 120 is mounted on the top of the variable diameter pile driver 110 , the rigging platform 120 is relatively close to the inner lifting lug 112 of the variable diameter pile driver 110 , so as to facilitate the switching of the lifting points.

[0020] The pile driver assembly 100 includes a variable diameter pile driver 110. The variable diameter pile driver 110 has a larger bottom diameter, which can adapt to the top diameter of a monopile foundation. The variable diameter pile driver 110 has a smaller top diameter, which can adapt to the hammer cap of a hydraulic hammer 400. Therefore, the variable diameter pile driver 110 can be used to effectively adapt the hammer cap of the hydraulic hammer 400 to the top diameter of the monopile foundation for hammering and sinking piles. At the same time, the pile driver assembly 100 also has a mounting position 111 on the top of the variable diameter pile driver 110 to facilitate the stable installation of a rigging platform 120. When lifting the variable diameter pile driver 110, the rigging platform 120 can be first lifted and installed on the top of the variable diameter pile driver 110. A worker can then switch the lifting points within the rigging platform 120 and connect the lifting rigging to the inner lifting lug 112 of the variable diameter pile driver 110. Afterwards, the variable diameter pile driver 110 is connected to the rigging platform 120 and hoisted to the top of the monopile foundation. The staff then switches the lifting point again within the rigging platform 120, connects the lifting rigging to the rigging platform 120, and hoists the rigging platform 120 away from the variable diameter pile driver 110 to facilitate the subsequent installation of the hydraulic hammer 400 with the variable diameter pile driver 110. The use of the pile driver assembly 100 can effectively solve the problem of the mismatch between the hammer cap of the hydraulic hammer 400 and the diameter of the top of the large-diameter monopile foundation. At the same time, the installation of the variable diameter pile driver 110 and the removal of the lifting rigging can be completed by switching the lifting point within the stable rigging platform 120, effectively reducing the safety risks when removing the lifting rigging at high altitude and improving construction efficiency.

[0021] Example 2 Reference Figures 4 to 11 The second embodiment of the present invention discloses a method for sinking a single pile foundation, wherein the pile driver assembly 100 of the first embodiment is used to sink the pile. The method comprises the following steps: Step S100: Single pile 300 self-sinks The steps include: Step S110, refer to Figure 4 , the ship is in position: Step S111: After the crane vessel is towed by the tugboat to the wind farm site, it drops anchor and performs preliminary positioning according to the pre-calculated anchor point coordinates, and displays the relative position relationship between the crane vessel and the tugboat in real time. The final position of the vessel is determined by the site level and wind direction, and the position is adjusted in real time according to changes during the process; Step S112: After the ship drops anchor, the crane vessel is accurately positioned near the designated position coordinates by winding the anchor according to the GPS positioning system equipped on the ship.

[0022] Step S120, refer to Figure 5 , install the pile stabilization platform 200: Step S121: The crane hook sets up the wire rope, lifts the pile stabilizing platform 200 by tail-lifting, and winds the anchor to near the center of the platform. The platform position is slowly adjusted by adjusting the crane boom and winds the anchor and moving the ship. The pile stabilizing platform 200 is lowered to the mud surface. The surveyor uses RTK on the pile stabilizing platform 200 to accurately locate the center of the platform. During the platform adjustment process, the coordinates of the center of the platform and the flatness of the pile stabilizing platform 200 are measured multiple times until the center deviation is controlled within the design range. Step S122: The auxiliary hook of the crane vessel lifts the vibratory hammer, the locking hook lifts the hydraulic oil pipe, the boom of the crane vessel is rotated to the top of the auxiliary pile 210, the auxiliary pile 210 is clamped with a clamp, and then the locking between the auxiliary pile 210 and the pile stabilizing platform 200 is contacted to allow the auxiliary pile 210 to sink naturally and then the pile is vibrated and sunk. After all the auxiliary piles 210 of the pile stabilizing platform 200 are sunk into place, the pile stabilizing platform 200 is fixed and the connecting plate between the pile stabilizing platform 200 and the auxiliary pile 210 is welded.

[0023] Step S130: The transport ship moves into position; After the crane ship cuts the anchor 200 meters away from the pile stabilizing platform, the single pile 300 transport ship enters the site and drops four anchors to be positioned at the stern of the crane ship, forming a "T" shape with the crane ship.

[0024] Step S140, refer to Figure 6 , Single pile 300 hoisting self-sinking: Step S141: After the transport ship is positioned, the rigging for the monopile 300 is installed. After all the rigging is installed, the main and auxiliary hooks are slowly raised. When the tail wire rope reaches a taut state and the wire rope at the main lifting eye of the monopile 300 is stressed, the main hook is raised and the center of gravity of the monopile 300 is found through the crane boom compensation. When the tail wire rope is fully stressed, the monopile 300 begins to be lifted horizontally. After the monopile 300 is lifted to a suitable height, the transport ship weighs anchor, removes the cables and sails away from the main operation ship. Step S142: After the transport ship leaves the berth, the main hook slowly descends to put the monopile 300 into the water. The crane commander keeps in touch with the crane via the intercom to monitor the tonnage of the main hook. When the tonnage of the main hook decreases to about the tail weight, the auxiliary hook is raised to unhook the tail wire rope. The traction rope is pulled out of the hook groove of the main hook by the auxiliary hook to complete the unhooking of the lower lifting point. After the tail wire rope is unhooked, the main hook is raised to start erecting the monopile 300. At the same time, the crane ship winches the anchor and moves the ship toward the pile tail. In step S143, after the monopile 300 is vertical, the main hook is continuously lifted to make the pile bottom leave the mud surface, the crane ship winds the anchor close to the pile stabilizing platform 200, and the monopile 300 is sent into the pile gripper by adjusting the ship position and the crane lifting amplitude, and then the dragon mouth of the pile stabilizing platform 200 is closed; before the monopile 300 is buried in the soil, the direction of the tower door is adjusted according to the direction of the pile body entering the dragon mouth, a cable wind rope is pulled from the crane ship to wrap around the pile, and the cable wind rope is dragged to rotate the pile body to adjust the direction of the tower door. When the direction of the pile body and the tower door meets the design requirements, the monopile 300 starts to sink by itself; during the self-sinking process of the monopile 300, the verticality is measured every 2 to 3 meters and adjusted by the jacking cylinder until the main hook is no longer stressed and the wire rope is loose; after the monopile 300 is self-sinking, it is kept still for a period of time to observe whether the monopile 300 has sunk to a stable state, and then the main hook is lowered to make the wire rope detach from the lifting eye, and the self-sinking of the monopile 300 is completed.

[0025] Step S200, refer to Figure 7 and Figure 8 The worker goes up to the rigging platform 120, connects the pile driver rigging to the platform lifting lug 121 of the rigging platform 120, and hoists the rigging platform 120 to the installation position 111 on the top of the variable diameter pile driver 110. Then the worker removes the pile driver rigging from the platform lifting lug 121 and connects the pile driver rigging to the inner lifting lug 112 on the top of the variable diameter pile driver 110. Then the worker is lifted from the rigging platform 120 to the deck of the crane vessel using a hoisting cage. Step S300, refer to Figure 9 The auxiliary hook of the crane ship lifts the hook and rotates the boom to lift the variable diameter pile driver 110 and the rigging platform 120 to the top of the single pile 300. After the single pile 300 is aligned, the hook is slowly released and the variable diameter pile driver 110 is lowered to the top of the single pile 300. During the process, care should be taken to prevent the pile from slipping. Step S400: After the variable diameter pile driver 110 is stabilized, a worker is hoisted to the rigging platform 120 using a hoist cage. The worker on the rigging platform 120 removes the pile driver rigging from the inner lifting lug 112 on the top of the variable diameter pile driver 110 and connects the pile driver rigging to the platform lifting lug 121 of the rigging platform 120. The rigging platform 120 is then hoisted to the deck of the crane vessel. Step S500, refer to Figure 10 , carry out hammer and pile sinking construction; Step S510: Hang the hydraulic hammer 400 wire rope onto the main hook of the crane ship through the crane ship rigging hook; during the hammer installation process, ensure that the center axis of the hammer and the pile are consistent. When the pile contacts the hammer, the weight of the hammer is loaded in stages. Step S520: Start the hydraulic hammer 400 to hammer and sink the pile. First, use a low-energy hammer to check whether the verticality meets the requirements. If the verticality exceeds the allowable error range, adjust the verticality of the pile using the pile stabilization platform 200 jack. After the pile body adjustment is completed and there is no change, continue sinking the pile, observing and adjusting every 3-4 meters until the single pile 300 reaches the designed elevation.

[0026] Step S600, refer to Figure 11 The hydraulic hammer 400 and the variable diameter pile driver 110 were hoisted onto the deck of the crane vessel. After sinking the single pile 300 to the designed elevation, the crane vessel lifted the hydraulic hammer 400 and stored it on the deck. The crane vessel's auxiliary hook lifted the rigging platform 120 and placed it on top of the variable diameter pile driver 110. Workers removed the rigging from the platform lug 121 of the rigging platform 120 and reattached it to the inner lug 112 of the variable diameter pile driver 110. Simultaneously, surveyors rechecked the horizontality of the pile top flange. After the recheck and the transfer of the rigging lifting point were completed, the crane vessel lifted the pile driver assembly 100 and placed it on the deck.

[0027] The pile driving method of the present invention adopts the above-mentioned pile driver assembly 100, which can effectively solve the problem of mismatch between the hammer cap of the hydraulic hammer 400 and the top diameter of the large-diameter single pile foundation. At the same time, the installation of the variable-diameter pile driver 110 and the removal of the sling can be completed by converting the lifting points within the stable rigging platform 120, effectively reducing the safety risks when removing the sling at high altitude and improving the construction efficiency.

[0028] It should be noted that in the description of the present invention, if there are any descriptions of directions, such as up, down, front, back, left, right, etc., the directions or positional relationships indicated are all based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operate in a specific direction, and cannot be understood as a limitation on the present invention.

[0029] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. If there are descriptions of "first," "second," and so on, these are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A pile driver assembly, characterized in that: The utility model comprises a variable diameter pile driver (110) and a rigging platform (120), wherein the top diameter of the variable diameter pile driver (110) is smaller than the bottom diameter, the top of the variable diameter pile driver (110) is provided with a mounting position (111), the top of the variable diameter pile driver (110) is also provided with an inner lifting lug (112), and the rigging platform (120) is provided with a platform lifting lug (121). The rigging platform (120) can be lifted to the mounting position (111) on the top of the variable diameter pile driver (110), and the lifting point can be switched between the platform lifting lug (121) and the inner lifting lug (112).

2. A method for sinking a single pile foundation, characterized in that: The pile driver assembly (100) according to claim 1 is used to drive piles, and the pile driving method comprises the following steps: Step S100, the single pile (300) is self-sinking; Step S200: The worker goes up to the rigging platform (120), connects the pile driver rigging to the platform lifting lug (121) of the rigging platform (120), and hoists the rigging platform (120) to the installation position (111) on the top of the variable diameter pile driver (110). The worker then removes the pile driver rigging on the platform lifting lug (121) and connects the pile driver rigging to the inner lifting lug (112) on the top of the variable diameter pile driver (110). The worker is then hoisted from the rigging platform (120) to the deck of the crane vessel using a hoisting cage. Step S300: The crane ship hoists the variable diameter pile driver (110) and the rigging platform (120) together to the top of the single pile (300). After the variable diameter pile driver (110) is aligned with the single pile (300), the variable diameter pile driver (110) is lowered to the top of the single pile (300); Step S400: Using a hoist cage to hoist a worker to the rigging platform (120), the worker in the rigging platform (120) removes the pile driver rigging on the inner lifting lug (112) on the top of the variable diameter pile driver (110), and connects the pile driver rigging to the platform lifting lug (121) of the rigging platform (120), and then hoists the rigging platform (120) to the deck of the crane vessel; Step S500, performing hammering and pile sinking construction; Step S600: hoist the hydraulic hammer (400) and the variable diameter pile driver (110) to the deck of the crane vessel.

3. The method for sinking a single pile foundation according to claim 2, wherein: Step S100 includes the following steps: Step S110: The ship is in position; Step S120, installing the pile stabilization platform (200); Step S130: The transport ship moves into position; Step S140: The single pile (300) is hoisted and sunk.

4. The method for sinking a single pile foundation according to claim 3, wherein: Step S110 includes the following steps: Step S111: After the crane vessel is towed by the tugboat to the wind farm site, it drops anchor and performs preliminary positioning according to the pre-calculated anchor point coordinates; Step S112: After the ship drops anchor, the crane vessel is accurately positioned near the designated position coordinates.

5. The method for sinking a single pile foundation according to claim 3, characterized in that: Step S120 includes the following steps: Step S121, hoisting the pile stabilizing platform (200) and anchoring it to the vicinity of the center of the machine position, and lowering the pile stabilizing platform (200) to the mud surface; Step S122: sink the auxiliary piles (210) of the pile stabilizing platform (200), and fix the pile stabilizing platform (200) after the piles are sunk into place.

6. The method for sinking a single pile foundation according to claim 3, characterized in that: Step S140 includes the following steps: Step S141, lifting the monopile (300). After the monopile (300) is lifted to a suitable height, the transport ship weighs anchor and removes the cable to sail away from the main operation ship; Step S142: After the transport ship leaves the berth, the monopile (300) is put into the water; Step S143: erecting the single pile (300). After the single pile (300) is erected, the single pile (300) is sent into the pile gripper, and the single pile (300) begins to sink by itself.

7. The method for sinking a single pile foundation according to claim 6, characterized in that: In step S143, the verticality of the single pile (300) is measured every 2m to 3m during the self-sinking process.

8. The method for sinking a single pile foundation according to claim 6, wherein: In step S143, after the monopile (300) has been self-sunk, it is left to stand still for a period of time to observe whether the monopile (300) has been self-sunk to a stable state.

9. The method for sinking a single pile foundation according to claim 2, characterized in that: Step S500 includes the following steps: Step S510, hang the hydraulic hammer (400) wire rope onto the main hook of the crane; Step S520: Start the hydraulic hammer (400) to hammer and sink the pile.

10. The method for sinking a single pile foundation according to claim 9, characterized in that: In step S520, first, a small tap is performed with a small amount of energy to check whether the verticality meets the requirements. If the verticality exceeds the allowable error range, the verticality of the single pile (300) is adjusted by the jack of the pile stabilizing platform (200). After the pile body adjustment is completed and there is no change, the pile is continued to be sunk. The pile is observed and adjusted every 3m to 4m until the single pile (300) is sunk to the designed elevation.

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