Offshore wind power jacket foundation lugless pile delivery device and installation method

Abstract

The present application relates to pile sinking construction technology field, disclose a sea wind power guide pipe frame foundation no lug type pile feeder and installation method, through the self-locking clamp pile device that can utilize friction self-locking, and hydraulic pile driver is combined, cooperate with pile feeder sleeve and pile foundation positioning seat fixed on the working platform, make the pile feeder sleeve only downward cannot upward, in the moment of hydraulic pile driver hammering, make the self-locking clamp pile device and pile feeder sleeve lock, further make hydraulic pile driver and offshore working platform lock for a short time, strongly restrain the up jump of hydraulic pile driver, make all the force act on the pile foundation, improve the efficiency of piling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile sinking construction, in particular to a no-lifting lug type pile carrier and installation method for offshore wind power jacket foundation. BACKGROUND

[0002] With the acceleration of the layout of offshore wind power projects and the continuous exploration of the marine environment, the offshore wind power industry is gradually advancing towards high power and deep sea. Offshore wind power is moving towards deep sea, and jacket type and floating type wind turbine foundations will play a key role. However, the current floating wind power technology in China is still in the prototype testing and demonstration engineering stage, so the jacket type wind turbine foundation will be the mainstream in the near future. Since the top of the steel pipe pile of the jacket foundation is underwater and only a few meters above the mud surface, the current domestic hydraulic hammer does not have the function of underwater hammer pile sinking. In order to sink the steel pipe pile to the design elevation, long replacement pile sinking must be adopted.

[0003] The current main pile sinking method is the lifting lug type pile carrier, which mainly installs the pile carrier in place through a lifting belt. The pile carrier serves as a replacement structure, and the pile sinking construction is completed through hydraulic hammering. Through analysis of this process, it is found that there are some major drawbacks. On the one hand, the lifting lug type pile carrier itself needs to have a lifting lug structure at an appropriate position on the pile during the design and manufacturing stage, so there are higher requirements for structural design and stress control, otherwise there is a risk of the lifting lug falling off during high-energy pile sinking construction. On the other hand, the lifting lug type pile carrier uses a lifting belt to sink into place. The length of the lifting belt is slightly longer than that of the pile carrier. The two ends of the lifting belt are connected to the lifting lug and the main hook of the hoisting equipment, respectively. After the sinking is completed, the connection with the main hook is released, and the lifting belt freely falls to the construction platform. During the pile sinking process, a person is arranged to simultaneously gather the lifting belt. After the pile sinking is completed, the main hook is reconnected, the pile carrier is removed, and the entire process is complicated and has safety hazards.

[0004] In addition, the pile driver used in the current pile sinking construction is placed on the top of the pile by lifting, without additional fixation. In the case of large ground resistance, the pile driver is prone to jumping up during pile driving, which may cause danger and affect the efficiency of pile driving. SUMMARY

[0005] The purpose of the present application is to provide a no-lifting lug type pile carrier and installation method for offshore wind power jacket foundation, to solve the problem of the current traditional pile sinking process being complicated and having safety hazards as mentioned in the background.

[0006] To achieve the above object, the present application provides the following technical scheme: offshore wind power jacket foundation lug-free pile delivery device, including hydraulic pile driver, the lower end of the hydraulic pile driver is fixedly connected with self-locking pile clamp device, the offshore working platform for pile sinking operation is fixedly installed with pile foundation positioning seat, the pile foundation positioning seat is sequentially penetrated by steel pipe pile and lug-free pile delivery device, the lower end of the lug-free pile delivery device is provided with an interval inserting section, the interval inserting section is inserted into the upper end of the steel pipe pile, and the lug-free pile delivery device is provided with a pile delivery device sleeve outside.

[0007] The self-locking pile clamp device includes a lifting ring, a large gear ring movably mounted in the lifting ring through a bearing, a driving pinion meshed with the inner side of the large gear ring, the driving pinion movably mounted on the lifting ring through an angular support bearing, a cross connecting frame fixedly connected to the hydraulic pile driver, a lifting guide rail fixedly connected to the end of the cross connecting frame, a rotating sleeve fixedly connected to the inside of the lifting ring, the rotating sleeve penetrating the rotating sleeve at the center of the driving pinion at the lower end of the lifting guide rail, the lifting guide rail being provided with a spiral groove, the rotating sleeve and the spiral groove being mutually embedded, a clamping gear meshed with the inner side of the large gear ring, a clamping arm fixedly connected to one side of the clamping gear, and an anti-skid clamping rod rotatably connected to the end of the clamping arm.

[0008] Further, the driving pinion, the rotating sleeve and the lifting guide rail are provided with four groups, the four groups of driving pinions are uniformly distributed on the inner side of the large gear ring, the four groups of driving pinions are closely meshed with the large gear ring, and the four lifting guide rails are fixedly connected to the four corner ends of the cross connecting frame, so as to ensure the stability of the self-locking pile clamp device.

[0009] Further, the hydraulic pile driver is provided with a pile driver lifting ring at the upper end, the hydraulic pile driver is hung on the first crane through the pile driver lifting ring, one pile clamp device lug is fixedly connected to each side of the lifting ring, and the pile clamp device lug is hung on the second crane.

[0010] Further, the pile foundation positioning seat includes a disc positioning seat, the disc positioning seat is fixedly installed on the offshore construction platform through bolts, the installation position of the disc positioning seat corresponds to the pile sinking coordinate point, and the disc positioning seat is used for positioning the pile sinking position, and the disc positioning seat is fixedly connected with a pile foundation positioning sleeve for preventing the steel pipe pile from deviating.

[0011] Further, the pile foundation positioning sleeve is provided with a clamping block sliding groove on each side, a trapezoidal clamping block is arranged in the clamping block sliding groove, a sliding block pull rod is further fixedly connected to the outer side of the trapezoidal clamping block, a pressure spring is sleeved on the sliding block pull rod, and the pressure spring is clamped between the inner wall of the clamping block sliding groove and the trapezoidal clamping block, so as to push the trapezoidal clamping block inward and mutually embed the trapezoidal teeth.

[0012] Further, trapezoidal teeth are processed on the outer side of the pile feeder sleeve, the trapezoidal teeth and the trapezoidal clamping block are mutually clamped, the slope of the trapezoidal teeth faces downward, when the pile feeder sleeve moves downward, the trapezoidal clamping block and the slope of the trapezoidal teeth slide, the trapezoidal clamping block is pushed outward and the pressure spring is compressed, when the pile feeder sleeve moves upward, the right angle edges of the trapezoidal clamping block and the trapezoidal teeth mutually block, so that the pile feeder sleeve can only move downward, and upward movement is blocked by the trapezoidal clamping block.

[0013] Further, the other end of the sliding block pull rod is movably connected with a disc clamping block through a rotating shaft, and the rotating shaft is located at the edge of the disc clamping block.

[0014] Further, the upper and lower ends of the pile feeder without lifting lugs are fixedly connected with upper and lower limit blocks, respectively, for limiting the pile feeder sleeve, and the distance between the upper and lower limit blocks is greater than the length of the pile feeder sleeve.

[0015] Further, the diameter of the pile foundation positioning sleeve is greater than that of the steel pipe pile, and the upper end of the pile foundation positioning sleeve is a flared mouth, facilitating hoisting and positioning of the steel pipe pile.

[0016] The present application provides another technical solution: a method for installing a pile feeder without lifting lugs for a jacket foundation of offshore wind power, comprising the following steps:

[0017] S1. Hoist the hydraulic pile driver: first, connect the first crane hook with the pile driver ring on the hydraulic pile driver, and then connect the two steel cables and hooks of the second crane with the two pile clamping device lifting lugs on the self-locking pile clamping device.

[0018] S2. Steel pipe pile picking, in place: the first crane is used to move the hydraulic pile driver and self-locking clamp pile to the position in front of the top of the steel pipe pile to be taken, the second crane is used to lift the lifting ring upwards, so that the anti-skid clamping rod of the self-locking clamp pile spreads outwards, leaving a clamping space, at the same time, the second crane continues to lift to adjust the posture of the hydraulic pile driver and the self-locking clamp pile to be horizontal, the self-locking clamp pile is sleeved outside the steel pipe pile, then the second crane lowers the self-locking clamp pile, the first crane lifts the hydraulic pile driver and the self-locking clamp pile together, the clamping of the self-locking clamp pile on the steel pipe pile is completed by using friction, then the turning base is used to complete the turning of the steel pipe pile, then the crane rotates the large arm to move the steel pipe pile to the pile sinking position, and the steel pipe pile and the pile foundation positioning seat are connected, and the steel pipe pile is slowly lowered to complete the self-weight into the soil.

[0019] S3. First stage pile sinking: after the steel pipe pile is hoisted, the hydraulic pile driver is lowered, so that the lifting guide rail is lowered, and the self-locking clamp pile is loosened, then the hydraulic pile driver is started to carry out pile driving operation, and the self-locking clamp pile supports during pile driving to prevent the hydraulic pile driver from shaking, when the lower end of the self-locking clamp pile is about 1m away from the pile foundation positioning seat, the first stage pile sinking is completed.

[0020] S4. Picking and positioning of the lugless pile carrier: the first crane is used to move the hydraulic pile driver and the self-locking clamp pile to the position in front of the top of the lugless pile carrier to be taken, the second crane is used to lift the lifting ring upwards, so that the anti-skid clamping rod of the self-locking clamp pile spreads outwards, leaving a clamping space, at the same time, the second crane continues to lift to adjust the posture of the hydraulic pile driver and the self-locking clamp pile to be horizontal, the self-locking clamp pile is sleeved outside the lugless pile carrier sleeve, then the second crane lowers the self-locking clamp pile, the first crane lifts the hydraulic pile driver and the self-locking clamp pile together, the clamping of the self-locking clamp pile on the lugless pile carrier sleeve is completed by using friction, then the turning base is used to complete the turning of the lugless pile carrier, then the crane rotates the large arm to move the lugless pile carrier to the pile sinking position, and the lugless pile carrier and the pile foundation positioning seat are connected, and the lugless pile carrier is slowly lowered, so that the lower end of the lugless pile carrier is inserted into the upper end of the steel pipe pile, and the positioning of the lugless pile carrier is completed.

[0021] S5. Second stage pile sinking: after the lugless pile carrier is hoisted, the hydraulic pile driver is started to carry out pile driving operation on the lugless pile carrier, and the steel pipe pile is sent to the predetermined depth, and the second stage pile sinking is completed.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] 1. The offshore wind power jacket foundation lugless pile delivery device and installation method, by adopting the lugless pile delivery device, the self-locking pile clamp is combined with the pile driver to clamp and install the steel pipe pile and the pile delivery device, without the need for additional crane assistance, and without the need for connection and unhooking of the lifting belt, the self-locking pile clamp can clamp the pile foundation and the pile delivery device when being lifted up, and can be unlocked after being hoisted into place, greatly simplifying the pile sinking process, the original process of pile sinking needs about 36 hours for one machine position, and the new process is expected to be completed within 30 hours, greatly improving the work efficiency.

[0024] 2. The offshore wind power jacket foundation lugless pile delivery device and installation method, by the self-locking pile clamp which can utilize friction self-locking, combined with the hydraulic pile driver, cooperating with the pile delivery device sleeve and the pile foundation positioning seat fixed on the working platform, the pile delivery device sleeve can only go down and cannot go up, at the moment of the hydraulic pile driver hammering, the self-locking pile clamp and the pile delivery device sleeve are locked, and the hydraulic pile driver and the offshore working platform are temporarily locked, the upward jump of the hydraulic pile driver is strongly inhibited, and all the forces are applied to the pile foundation, improving the efficiency of pile driving. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The working position structure schematic diagram of the present application is shown in the figure;

[0026] Figure 2 The hydraulic pile driver structure schematic diagram of the present application is shown in the figure;

[0027] Figure 3 The self-locking pile clamp structure schematic diagram of the present application is shown in the figure;

[0028] Figure 4 The pile delivery device sleeve structure schematic diagram of the present application is shown in the figure;

[0029] Figure 5 The pile foundation positioning seat structure schematic diagram of the present application is shown in the figure;

[0030] Figure 6 The pile foundation positioning seat and pile delivery device sleeve cooperation structure schematic diagram of the present application is shown in the figure.

[0031] The figure label: 1, hydraulic pile driver; 101, pile driver lifting ring; 2, self-locking pile clamp; 201, lifting ring; 202, gear ring; 203, drive pinion; 204, cross connecting frame; 205, lifting guide rail; 206, rotating sliding sleeve; 207, spiral groove; 208, clamping gear; 209, clamping arm; 210, anti-skid clamping rod; 211, pile clamp lifting lug; 3, pile foundation positioning seat; 301, disc positioning seat; 302, pile foundation positioning sleeve; 303, clamping block sliding groove; 304, trapezoidal clamping block; 305, sliding block pull rod; 306, pressure spring; 307, disc clamping block; 308, adjusting handle; 4, steel pipe pile; 5, earring-free pile feeder; 501, inter-insertion section; 502, upper limit block; 503, lower limit block; 6, pile feeder sleeve; 601, trapezoidal tooth. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] In order to further understand the present application, the present application will be described in detail with reference to the drawings.

[0034] Please refer to Figure 1 Figure 6 The offshore wind power jacket foundation earring-free pile feeder comprises a hydraulic pile driver 1, a pile driver lifting ring 101 is arranged at the upper end of the hydraulic pile driver 1, the hydraulic pile driver 1 is hung on a crane through the pile driver lifting ring 101, and a self-locking pile clamp 2 is fixedly connected to the lower end of the hydraulic pile driver 1. The self-locking pile clamp 2 uses gravity and friction force to complete the hoisting of the steel pipe pile 4 and the earring-free pile feeder 5.

[0035] The offshore working platform for pile sinking operation is fixedly provided with a pile foundation positioning seat 3, the steel pipe pile 4 is subjected to pile sinking operation under the limitation of the pile foundation positioning seat 3, when the pile sinking operation cannot be continued due to the fact that the upper end of the steel pipe pile 4 is sunk to the pile foundation positioning seat 3, the inter-insertion section 501 at the lower end of the earring-free pile feeder 5 is inserted into the steel pipe pile 4 to extend the steel pipe pile 4, so that the pile sinking operation can be continued.

[0036] As Figure 2 and Figure 3 ​As shown, the self-locking clamp pile device 2 comprises a lifting ring 201, a large gear ring 202 is movably mounted in the lifting ring 201 through a bearing, a driving pinion 203 is engaged on the inner side of the large gear ring 202, the driving pinion 203 is provided in four groups, the driving pinion 203 is movably mounted on the lifting ring 201 through an angular support bearing, a cross connecting frame 204 is fixedly connected on the hydraulic pile driver 1, a lifting guide rail 205 is fixedly connected at the end of the cross connecting frame 204, a rotating sliding sleeve 206 is fixedly connected inside the lifting ring 201, the lower end of the lifting guide rail 205 penetrates through the rotating sliding sleeve 206 at the center of the driving pinion 203, and a spiral groove 207 is formed on the lifting guide rail 205, the rotating sliding sleeve 206 and the spiral groove 207 are mutually embedded, when the rotating sliding sleeve 206 slides up and down along the lifting guide rail 205, the rotating sliding sleeve 206 will also rotate along the spiral groove 207, thereby driving the driving pinion 203 to rotate, and then driving the large gear ring 202 to rotate, in addition, four groups of clamping gears 208 are also engaged on the inner side of the large gear ring 202, a clamping arm 209 is fixedly connected on one side of the clamping gear 208, an anti-skid clamping rod 210 is rotatably connected at the end of the clamping arm 209, when the large gear ring 202 rotates, it will drive the clamping gear 208 to rotate, thereby making the clamping arm 209 rotate inward, and the anti-skid clamping rod 210 is used for clamping, after clamping, the friction between the anti-skid clamping rod 210 and the steel pipe pile 4 will continue to pull the lifting ring 201 downward, thereby further increasing the clamping force of the anti-skid clamping rod 210, so that the heavier the steel pipe pile 4, the greater the clamping force it receives, which can effectively prevent the steel pipe pile 4 from slipping.

[0037] In addition, one pile device lifting lug 211 is fixedly connected on each side of the lifting ring 201, which is used for connecting the steel cable to be hung on the crane, so that the lifting ring 201 can be lifted by the crane, thereby making the driving pinion 203, the large gear ring 202 and the clamping gear 208 rotate in the opposite direction, thereby making the anti-skid clamping rod 210 retreat around, releasing the clamping of the steel pipe pile 4, in addition, the crane lifting the hydraulic pile driver 1 can also be matched to change the posture of the hydraulic pile driver 1, so that the hydraulic pile driver 1 and the self-locking clamp pile device 2 are transversely placed, the steel pipe pile 4 placed on the ship and the pile without lifting the ear device 5 are lifted, when lifting, the steel pipe pile 4 will pull the lifting ring 201 through friction, thereby making the anti-skid clamping rod 210 clamp the steel pipe pile 4, thereby lifting the steel pipe pile 4 for installation, after installation, the bottom of the steel pipe pile 4 contacts the seabed and is supported, so that the lifting ring 201 will not be subjected to downward pulling force, at this time, the lifting ring 201 is lifted by the crane, the anti-skid clamping rod 210 will spread around, stopping clamping the steel pipe pile 4, facilitating the pile sinking operation.

[0038] As shown in the figure, Figure 5 and Figure 6As shown, the pile foundation positioning seat 3 comprises a disc positioning seat 301 which is fixedly installed on the offshore construction platform by bolts, and the installation position of the disc positioning seat 301 corresponds to the pile sinking coordinate point, and the disc positioning seat 301 is fixedly connected with a pile foundation positioning sleeve 302, the diameter of the pile foundation positioning sleeve 302 is larger than that of the steel pipe pile 4, and the upper end of the pile foundation positioning sleeve 302 is a flared mouth, which facilitates the hoisting and positioning of the steel pipe pile 4.

[0039] The pile foundation positioning sleeve 302 is further provided with a clamping block sliding groove 303 on each side, and the clamping block sliding groove 303 is provided with a trapezoidal clamping block 304, and correspondingly, the outer side of the pile driver sleeve 6 is provided with a trapezoidal tooth 601, and the trapezoidal tooth 601 and the trapezoidal clamping block 304 are mutually clamped, and the outer side of the trapezoidal clamping block 304 is further fixedly connected with a sliding block pull rod 305, the sliding block pull rod 305 is provided with a pressure spring 306, the pressure spring 306 is clamped between the inner wall of the clamping block sliding groove 303 and the trapezoidal clamping block 304, and is used for pushing the trapezoidal clamping block 304 inwardly and mutually embedding the trapezoidal clamping block 304 and the trapezoidal tooth 601, when the pile driver sleeve 6 moves downwardly, the inclined surface of the trapezoidal clamping block 304 and the trapezoidal tooth 601 slides, and the trapezoidal clamping block 304 is pushed outwardly and the pressure spring 306 is compressed, when the pile driver sleeve 6 moves upwardly, the right angle edge of the trapezoidal clamping block 304 and the trapezoidal tooth 601 are mutually blocked, so that the pile driver sleeve 6 can only move downwardly, and upward movement will be blocked by the trapezoidal clamping block 304.

[0040] In addition, the other end of the sliding block pull rod 305 is movably connected with a disc clamping block 307 through a rotating shaft, and the rotating shaft is located at the edge of the disc clamping block 307, and the disc clamping block 307 is further fixedly connected with an adjusting handle 308, when the disc clamping block 307 is rotated through the adjusting handle 308, the rotating shaft will eccentrically move, so that the sliding block pull rod 305 is pulled outwardly, and then the trapezoidal clamping block 304 is retracted into the clamping block sliding groove 303, and no longer blocks the upward movement of the pile driver sleeve 6, so that the pile driver sleeve 6 can be pulled out.

[0041] As Figure 4As shown, the upper and lower ends of the lugless pile carrier 5 are respectively fixedly connected with an upper limiting block 502 and a lower limiting block 503, which are used for limiting the pile carrier sleeve 6, and the spacing between the upper limiting block 502 and the lower limiting block 503 is greater than the length of the pile carrier sleeve 6, facilitating the up-and-down sliding of the pile carrier sleeve 6. During the pile sinking operation, the pile carrier sleeve 6 is located at the lower side, and the upper end of the lugless pile carrier 5 protrudes from the pile carrier sleeve 6 by a distance. When the hydraulic pile driver 1 is working, the hammer of the hydraulic pile driver 1 falls to hammer the lugless pile carrier 5, the hydraulic pile driver 1 is pushed upward by the reverse pushing force, and further drives the lifting guide rail 205 to move upward, so that the self-locking pile clamp 2 further clamps the pile carrier sleeve 6, and the trapezoidal teeth 601 on the outer side of the pile carrier sleeve 6 can also prevent slipping, so that the hydraulic pile driver 1 is locked with the pile carrier sleeve 6 at the moment of hammering, and at the same time, the pile carrier sleeve 6 is locked with the offshore operation platform through the clamping connection of the pile foundation positioning seat 3, so that the hydraulic pile driver 1 is locked on the offshore operation platform and cannot jump upward, so that all the force acts on the lugless pile carrier 5, improving the pile driving efficiency.

[0042] The installation method of the lugless pile carrier for the offshore wind power jacket foundation comprises the following steps:

[0043] S1. Hanging the hydraulic pile driver 1: first, the first crane hook is connected with the pile driver lifting ring 101 on the hydraulic pile driver 1, and then the second crane uses two steel cables and hooks to be connected with the two pile clamp lifting ears 211 on the self-locking pile clamp 2.

[0044] S2. Picking up and positioning the steel pipe pile 4: the first crane moves the hydraulic pile driver 1 and the self-locking pile clamp 2 to a position in front of the top end of the steel pipe pile 4 to be picked up, the second crane lifts the lifting ring 201 upward, so that the anti-slip clamping rods 210 of the self-locking pile clamp 2 spread out in all directions to leave a clamping space, and the second crane continues to lift to adjust the posture of the hydraulic pile driver 1 and the self-locking pile clamp 2 to be horizontal, the self-locking pile clamp 2 is sleeved outside the steel pipe pile 4, then the second crane lowers the self-locking pile clamp 2, the first crane lifts the hydraulic pile driver 1 and the self-locking pile clamp 2 together, the self-locking pile clamp 2 clamps the steel pipe pile 4 by friction, then the turning-over base is used to complete the turning-over of the steel pipe pile 4, and then the crane rotates the large arm to move the steel pipe pile 4 to the pile sinking position and make the steel pipe pile 4 and the pile foundation positioning seat 3 complete butt joint, and slowly lower the steel pipe pile 4 to complete the self-weight entering into the soil.

[0045] S3. First stage pile sinking: after the completion of the hoisting of the steel pipe pile 4, the hydraulic pile driver 1 is put down, the hydraulic pile driver 1 is lowered, thereby driving the lifting guide rail 205 to be lowered, the self-locking pile clamp 2 is loosened, then the hydraulic pile driver 1 is started to carry out the pile driving operation, the self-locking pile clamp 2 supports during the pile driving to prevent the hydraulic pile driver 1 from shaking, when the distance between the lower end of the self-locking pile clamp 2 and the pile foundation positioning seat is about 1m, the first stage pile sinking is completed.

[0046] S4. Picking up and positioning of the lugless pile carrier 5: the hydraulic pile driver 1 and the self-locking pile clamp 2 are moved to a position in front of the lugless pile carrier 5 to be picked up by using the first crane, the lifting ring 201 is lifted upward by using the second crane, thereby driving the anti-skid clamping rods 210 of the self-locking pile clamp 2 to spread around, leaving a clamping space, at the same time, the second crane continues to lift to adjust the posture of the hydraulic pile driver 1 and the self-locking pile clamp 2 to be horizontal, the self-locking pile clamp 2 is sleeved outside the pile carrier sleeve 6, then the second crane lowers the self-locking pile clamp 2, the first crane lifts the hydraulic pile driver 1 and the self-locking pile clamp 2 together, the clamping of the self-locking pile clamp 2 to the pile carrier sleeve 6 is completed by using the friction force, then the lugless pile carrier 5 is turned over by using the turning-over base, then the crane rotates the large arm to move the lugless pile carrier 5 to the pile sinking position, and makes the lugless pile carrier 5 complete the butt joint with the pile foundation positioning seat 3, the lugless pile carrier 5 is slowly lowered, the lugless pile carrier 5 is inserted into the upper end of the steel pipe pile 4, and the positioning of the lugless pile carrier 5 is completed.

[0047] S5. Second stage pile sinking: after the completion of the hoisting of the lugless pile carrier 5, the hydraulic pile driver 1 is started to carry out the pile driving operation on the lugless pile carrier 5, the steel pipe pile 4 is sent to the predetermined depth, and the second stage pile sinking is completed.

[0048] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lugless pile driver for offshore wind turbine jacket foundations, comprising a hydraulic pile driver (1), characterized in that: The hydraulic pile driver (1) is fixedly connected to a self-locking pile clamp (2) at its lower end. A pile foundation positioning seat (3) is fixedly installed on the offshore working platform used for pile driving operations. A steel pipe pile (4) and a pile driver without lifting lugs (5) are sequentially passed through the pile foundation positioning seat (3). The pile driver without lifting lugs (5) is provided with an insertion section (501) at its lower end. The insertion section (501) is inserted into the upper end of the steel pipe pile (4). A pile driver sleeve (6) is sleeved on the outside of the pile driver without lifting lugs (5). The self-locking pile clamp (2) includes a lifting ring (201), a large gear ring (202) is movably mounted inside the lifting ring (201) via a bearing, a driving pinion (203) meshes inside the large gear ring (202), and the driving pinion (203) is movably mounted on the lifting ring (201) via an angular support bearing. A cross connecting frame (204) is fixedly connected to the hydraulic pile driver (1), and a lifting guide rail (205) is fixedly connected to the end of the cross connecting frame (204). The lifting ring (201) is internally fixed. A rotating sleeve (206) is connected to the lifting guide rail (205), the lower end of which passes through the rotating sleeve (206) at the center of the driving pinion (203). A spiral groove (207) is provided on the lifting guide rail (205). The rotating sleeve (206) and the spiral groove (207) are fitted together. A clamping gear (208) is meshed on the inner side of the large gear ring (202). A clamping arm (209) is fixedly connected to one side of the clamping gear (208). An anti-slip clamping rod (210) is rotatably connected to the end of the clamping arm (209). The hydraulic pile driver (1) is provided with a pile driver lifting ring (101) at the upper end. The hydraulic pile driver (1) is suspended on the first crane through the pile driver lifting ring (101). A pile clamping lug (211) is fixedly connected to each side of the lifting ring (201). The pile clamping lug (211) is suspended on the second crane.

2. The lugless pile driver for offshore wind turbine jacket foundations according to claim 1, characterized in that: The drive pinion (203), the rotating sleeve (206), and the lifting guide rail (205) are all provided with four sets. The four sets of drive pinions (203) are evenly distributed inside the large gear ring (202). The four sets of drive pinions (203) are tightly meshed with the large gear ring (202). The four lifting guide rails (205) are fixedly connected to the four corner ends of the cross connecting frame (204).

3. The lugless pile driver for offshore wind turbine jacket foundations according to claim 1, characterized in that: The pile foundation positioning seat (3) includes a disc positioning seat (301), which is fixedly installed on the offshore construction platform by bolts, and the installation position of the disc positioning seat (301) corresponds to the pile driving coordinate point. A pile foundation positioning sleeve (302) is fixedly connected to the disc positioning seat (301).

4. The lugless pile driver for offshore wind turbine jacket foundations according to claim 3, characterized in that: The pile foundation positioning sleeve (302) is provided with a locking block groove (303) on each side. A trapezoidal locking block (304) is provided in the locking block groove (303). A slider rod (305) is fixedly connected to the outside of the trapezoidal locking block (304). A pressure spring (306) is provided on the outside of the slider rod (305). The pressure spring (306) is locked between the inner wall of the locking block groove (303) and the trapezoidal locking block (304).

5. The lugless pile driver for offshore wind turbine jacket foundations according to claim 4, characterized in that: The outer side of the pile driver sleeve (6) is machined with trapezoidal teeth (601), which engage with trapezoidal blocks (304), with the inclined surface of the trapezoidal teeth (601) facing downwards.

6. The lugless pile driver for offshore wind turbine jacket foundations according to claim 4, characterized in that: One end of the slider rod (305) is movably connected to a disc block (307) via a rotating shaft, and the rotating shaft is located at the edge of the disc block (307). An adjusting handle (308) is also fixedly connected to the disc block (307).

7. The lugless pile driver for offshore wind turbine jacket foundations according to claim 3, characterized in that: The upper end of the pile driver (5) without a lifting lug is fixedly connected to an upper limit block (502), and the lower end of the pile driver (5) without a lifting lug is fixedly connected to a lower limit block (503). The distance between the upper limit block (502) and the lower limit block (503) is greater than the length of the pile driver sleeve (6).

8. The lugless pile driver for offshore wind turbine jacket foundations according to claim 3, characterized in that: The diameter of the pile foundation positioning sleeve (302) is larger than that of the steel pipe pile (4), and the upper end of the pile foundation positioning sleeve (302) is a flared mouth.

9. The installation method of the lugless pile driver for offshore wind turbine jacket foundation according to any one of claims 1-8, characterized in that: Includes the following steps: S1. Hanging the hydraulic pile driver (1): First, use the hook of the first crane to connect with the pile driver lifting ring (101) on the hydraulic pile driver (1), and then use two steel cables and hooks to connect with the two pile clamping lugs (211) on the self-locking pile clamp (2) respectively. S2. Picking up and positioning the steel pipe pile (4): Using the first crane, the hydraulic pile driver (1) and the self-locking pile clamp (2) are moved to the position in front of the top of the steel pipe pile (4) to be picked up. Using the second crane, the lifting ring (201) is lifted upward, so that the anti-slip clamping bar (210) of the self-locking pile clamp (2) spreads out to the four sides, leaving clamping space. At the same time, the second crane continues to lift to adjust the posture of the hydraulic pile driver (1) and the self-locking pile clamp (2) to be horizontal, and the self-locking pile clamp (2) is placed on the steel pipe pile (4). Outside the pipe pile (4), the second crane lowers the self-locking pile clamp (2), the first crane lifts the hydraulic pile driver (1) and the self-locking pile clamp (2) together, and uses friction to clamp the steel pipe pile (4) with the self-locking pile clamp (2). Then, using the turning base, the steel pipe pile (4) is turned over. Then, the crane rotates the boom to move the steel pipe pile (4) to the pile driving position and makes the steel pipe pile (4) dock with the pile foundation positioning seat (3). The steel pipe pile (4) is slowly lowered to complete the self-weight entry into the soil. S3. First stage of pile driving: After the steel pipe pile (4) is hoisted, the hydraulic pile driver (1) is lowered. The hydraulic pile driver (1) descends, thereby driving the lifting guide rail (205) to descend, causing the self-locking pile clamp (2) to release. Then, the hydraulic pile driver (1) is started to carry out pile driving. The self-locking pile clamp (2) provides support during pile driving to prevent the hydraulic pile driver (1) from shaking. When the lower end of the self-locking pile clamp (2) is 1m away from the pile foundation positioning seat, the first stage of pile driving is completed. S4. Picking up and positioning the lugless pile driver (5): Using the first crane, move the hydraulic pile driver (1) and the self-locking pile clamp (2) to the position in front of the top of the lugless pile driver (5) to be picked up. Using the second crane, lift the lifting ring (201) upward, so that the anti-slip clamping bar (210) of the self-locking pile clamp (2) spreads out to the sides, leaving clamping space. At the same time, the second crane continues to lift to adjust the posture of the hydraulic pile driver (1) and the self-locking pile clamp (2) to be horizontal, and put the self-locking pile clamp (2) on the outside of the pile driver sleeve (6). Then the second crane lowers the self-locking pile clamp (2). The first crane lifts the hydraulic pile driver (1) and the self-locking pile clamp (2) together, and uses friction to clamp the self-locking pile clamp (2) onto the pile driver sleeve (6). Then, using the turning base, the pile driver (5) without lifting lugs is turned over. Then, the crane rotates the boom to move the pile driver (5) without lifting lugs to the pile driving position, and makes the pile driver (5) without lifting lugs dock with the pile foundation positioning seat (3). The pile driver (5) without lifting lugs is slowly lowered, so that the insertion section (501) at the lower end of the pile driver (5) is inserted into the upper end of the steel pipe pile (4), and the positioning of the pile driver (5) without lifting lugs is completed. S5. Second stage of pile driving: After the pile driver (5) without lifting lugs is hoisted, start the hydraulic pile driver (1) to drive the pile driver (5) without lifting lugs into the predetermined depth, thus completing the second stage of pile driving.

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