Cross hook hanging beam for offshore wind power and single-ship pile turning construction method thereof

Abstract

The invention discloses a cross hook hanging beam for offshore wind power and a single-ship pile turning construction method thereof. The hanging beam comprises an upper balance hanging beam body, a cross hook, a rigging and a lower balance hanging beam body which are sequentially arranged from top to bottom. The upper balance hanging beam comprises a horizontally-arranged beam body, two upper shaft pins are symmetrically and horizontally fixed to the two ends of the top side of the beam body, and a connecting shaft pin is horizontally fixed to the middle of the bottom side of the beam body. The cross-shaped hook comprises a rotating bearing, a connecting pin is arranged at the top of an inner ring of the bearing, and four claw hooks are evenly distributed on the annular outer wall of an outer ring of the bearing in the circumferential direction. The connecting pin sleeves the connecting shaft pin through a connecting ring at the top end; the four grappling hooks are arranged in a manner that the grappling claws face upwards; one sides of the riggings are respectively sleeved on the alignment grabbers, and the other sides of the riggings are connected to the lower balance hanging beam; according to the hanging beam and the single-ship pile turning construction method thereof, the hoisting capacity of a crane ship can be fully exerted, pile turning construction operation can be completed only by means of a single ship for heavy steel pipe piles, the operation efficiency is high, and the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of offshore wind power operation, and in particular to a cross hook hanging beam for offshore wind power and a single-ship pile turning construction method thereof. Background Art

[0002] With the development of domestic offshore wind power construction technology and the improvement of supporting facilities, the single-ship pile turning technology is constantly being updated, and the advancement and safety of the technology are better guaranteed. In order to further reduce the investment in ships and machinery, thereby achieving the goal of reducing engineering construction costs, the necessity of enhancing the research on single-ship pile turning technology and supporting devices has become more prominent.

[0003] At present, there are two main methods for single pile sinking operations at sea. One method for single pile sinking is the double-machine lifting method, which is suitable for large-sized and heavy steel pipe pile turning operations. That is, two crane ships are used, one with a larger lifting capacity as the main crane ship, and the other with a smaller lifting capacity as the tail crane ship. The two ships need to be synchronized and closely coordinated with each other to complete the steel pipe pile turning. Another method for single pile sinking is the single-ship pile turning method, which is suitable for small-sized and heavy steel pipe pile turning operations. That is, a fully revolving crane ship independently hangs the main lifting sling and the tail sling to complete the steel pipe pile turning.

[0004] However, as wind turbines have become larger and larger in recent years, the length and weight of steel pipe piles have been further increased, and the main lifting lugs on the wall of the steel pipe piles have been closer and closer to the center of gravity of the steel pipe piles. When using the traditional double-machine lifting and turning pile construction technology, it is not easy to control the stability of the steel pipe piles when turning over super-large diameter, super-heavy and super-long steel pipe piles, resulting in the need to constantly adjust the verticality of the pile body during the turning process. Therefore, the coordination requirements of the two crane ships are higher, and the construction time will also be greatly increased. Based on this, it is of great significance to develop a steel pipe pile turning device that can save the turning construction time and improve the turning stability. Summary of the invention

[0005] The purpose of the present invention is to provide a cross hook beam for offshore wind power that solves the above-mentioned technical problems.

[0006] Another object of the present invention is to provide a single-ship pile turning construction method implemented by using the above-mentioned cross hook lifting beam for offshore wind power.

[0007] To this end, the technical solution of the present invention is as follows: A cross hook beam for offshore wind power, comprising an upper balance beam, a cross hook, rigging and a lower balance beam arranged in sequence from top to bottom; wherein the upper balance beam comprises a horizontally arranged beam body, two upper axle pins are symmetrically and horizontally fixed at the two ends of its top side, and a connecting axle pin is horizontally fixed at the middle part of its bottom side; the cross hook comprises a rotating bearing, a connecting pin is provided at the top of the inner ring of the bearing, and four claw hooks are evenly distributed along the circumferential direction on the annular outer wall of the outer ring of the bearing; the connecting pin is mounted on the connecting axle pin through a connecting ring at the top; the four claw hooks are arranged in a manner of claws facing upwards; the rigging is two annular slings of the same length, one side of the two are respectively mounted on two counter-positioned claw hooks, and the other side of the two are respectively mounted on the upper hanging points at the two ends of the lower balance beam, and the two ends of the lower balance beam are also provided with lower hanging points.

[0008] Furthermore, the beam body of the upper balancing suspension beam includes a front beam plate and a rear beam plate which are arranged vertically and in parallel, and a connecting beam is arranged horizontally and centrally between the two, so that the front beam plate and the rear beam plate are connected and fixed as a whole through the connecting beam; the top ends of the front beam plate and the rear beam plate extend upward and form upper connecting parts, and two upper axle pins are horizontally penetrated and fixed on the two upper connecting parts on each side; the middle part of the bottom side of the front beam plate and the rear beam plate extends downward and forms a first lower connecting part, and the connecting axle pin is horizontally penetrated and fixed on the two first lower connecting parts.

[0009] Furthermore, two groups of axle pins are arranged at both ends of the bottom side of the upper balance suspension beam, each group of axle pins is composed of two lower axle pins fixed horizontally and symmetrically arranged on the beam body, and the spacing between the lower axle pins in the two groups of axle pins is set differently.

[0010] Furthermore, two working platforms are symmetrically fixed on the upper side of the beam plate on one side of the upper balance hanging beam.

[0011] Furthermore, the cross hook also includes four anti-drop chains, which are evenly distributed along the circumferential direction of the connecting pin; one end of each anti-drop chain is fixed on the connecting pin, and the other end is detachably connected to the claw end of the adjacent claw hook.

[0012] Furthermore, the lower balancing suspension beam includes an inverted U-shaped beam body, and the two ends of the front and rear side walls of the beam body extend outward in the horizontal direction and form connecting plates, and upper connecting shafts and lower connecting shafts are horizontally fixed between the two connecting plates at each end, and the two upper connecting shafts and the two lower connecting shafts are symmetrically arranged at the two ends of the inverted U-shaped beam body.

[0013] A single-ship pile turning construction method using the cross-hook crane beam for offshore wind power generation is implemented, and the steps are as follows: S1. Connect the two main hooks of the crane ship to the two upper shaft pins of the upper balance beam through slings, and sleeve one side of the two circular slings of the rigging on the two counter-position claw hooks and the other side on the two upper hanging points of the lower balance beam; S2, one side of the two steel pipe pile slings is respectively sleeved on the two lower suspension points of the lower balance suspension beam, and the other side is sleeved on the two suspension points on the opposite sides of the steel pipe pile body; one side of a tail sling is sleeved on another claw hook, and the other side is connected to the tail end of the steel pipe pile through a clamp; wherein the length of the tail sling is greater than the length of the steel pipe pile sling, so that the steel pipe pile can be lifted obliquely to mid-air; S3. The double main hooks of the crane ship are gradually lifted, so that the steel pipe piles initially arranged horizontally on the hull are gradually lifted, and the steel pipe piles are lifted to the horizontal transfer height position in the state of being arranged obliquely; S4. The double main hooks of the crane ship drive the steel pipe pile to move horizontally to the top of the designated pile position, and then slowly lower it into the water until one end of the steel pipe pile contacts the underwater mud surface; the steel pipe pile is continuously lowered to reduce the oblique angle of the steel pipe pile, and the tail rope automatically falls off the claw hook due to relaxation; S5. The double main hooks of the crane ship are gradually lifted, so that the steel pipe pile with one end supported on the mud surface is gradually turned upward until it reaches a vertical state. At this time, the double main hooks of the crane ship stop lifting and the pile turning is completed; S6. The double main hooks of the crane ship are slowly lowered to cooperate with the steel pipe pile to sink by itself under the action of gravity while keeping the steel pipe pile sinking vertically; S7. After the steel pipe pile is self-sinking and stable, the double main hooks of the crane ship continue to be lowered to make the steel pipe pile lifting cable fall off from the lifting point of the steel pipe pile. Then the cross hook lifting beam is moved to the next steel pipe pile to be lifted on the ship through the double main hooks of the crane ship. The operating personnel continue the subsequent pile sinking operation on the self-sinking and stable steel pipe pile.

[0014] Furthermore, in step S2, the length of the tail rope is sufficient to lift the steel pipe pile into the air at an angle of 15° to 20°.

[0015] Compared with the prior art, the cross hook lifting beam for offshore wind power retains the lifting function of the conventional lifting beam and sequentially adds a cross hook, rigging and a lower balancing lifting beam below it to give full play to the lifting capacity of the crane ship. When facing heavy steel pipe piles, the upper balancing lifting beam and the lower balancing lifting beam of the cross hook lifting beam are respectively connected to the crane ship hook above and the steel pipe pile below. At the same time, the cross hook is used to ensure the connection strength and increase the adjustment freedom between the crane ship hook and the steel pipe pile by utilizing its slewing function, so as to avoid the twisting of the sling caused by angle problems during lifting and pile turning, as well as the influence of sea waves, effectively control the stability of the steel pipe pile during the entire operation process, realize the completion of pile turning construction work by relying on only a single ship, give full play to the lifting capacity of the crane ship, and have high operation efficiency and low cost, effectively solve the subsequent deep-sea offshore wind power single pile foundation single ship machine construction pile turning problem, and have good application and promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of a cross hook hanging beam for offshore wind power of the present invention; Figure 2 It is a schematic structural diagram of a cross hook lifting beam and a cross hook of a cross hook lifting beam for offshore wind power of the present invention; Figure 3 It is a schematic diagram of a cross hook of a cross hook lifting beam for offshore wind power of the present invention; Figure 4 This is a structural schematic diagram of an upper balancing beam of a cross hook beam for offshore wind power of the present invention being equipped with a working platform; Figure 5 It is a schematic diagram of the state in which the steel pipe piles are initially horizontally arranged on board in the single-ship pile turning construction method implemented by the cross-hook lifting beam for offshore wind power of the present invention; Figure 6 It is a schematic diagram of the state of lifting a steel pipe pile into the air in a single-ship pile-turning construction method implemented by adopting the cross-hook lifting beam for offshore wind power of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way. Example 1

[0018] See also Figure 1 The cross hook beam for offshore wind power comprises an upper balance beam 1, a cross hook 2, a rigging 7 and a lower balance beam 8 which are arranged in sequence from top to bottom.

[0019] See also Figure 2 The upper balance suspension beam 1 includes a horizontally arranged beam body, which specifically includes a front beam plate and a rear beam plate arranged vertically and in parallel, with a connecting beam arranged horizontally and centrally between the two, so that the front beam plate and the rear beam plate are connected and fixed as a whole through the connecting beam; the top ends of the front beam plate and the rear beam plate extend upward and form an upper connecting portion 3, and the two upper connecting portions 3 on each side are horizontally penetrated and fixed with upper axle pins 9; the middle part of the bottom side of the front beam plate and the rear beam plate extends downward and forms a first lower connecting portion 11, and the two first lower connecting portions 11 are horizontally penetrated and fixed with connecting axle pins 5.

[0020] In actual application, the two upper axle pins 9 of the upper balancing lifting beam 1 are used to connect with the two main hooks of the crane ship through the slings, so as to realize the lifting of the entire device through the upper balancing lifting beam 1; wherein, sufficient gap is left between the upper axle pin 9 and the lower connecting beam to ensure that slings of different sizes can be mounted on the upper axle pin 9.

[0021] As a preferred technical solution of this embodiment, the two ends of the bottom of the front beam plate and the rear beam plate extend downward and form a second lower connecting part 4, and two lower axle pins 10 are horizontally penetrated and fixed on the two second lower connecting parts 4 on each side; wherein, the two lower axle pins 10 located on the two second lower connecting parts 4 on both sides are arranged obliquely symmetrically, so that two groups of lower axle pins 10 are symmetrically formed on the bottom side of the upper balance beam 1 to meet the lifting requirements of two conventional sizes, so that the upper balance beam 1 can also be used as a conventional beam alone, increasing the universality and versatility of the device; in addition, the two lower axle pins 10 on each side are preferably arranged on both sides of the midline of the upper axle pin 9 on the same side, and the vertical distances from the two to the midline of the upper axle pin 9 are the same to ensure the balance of the lifting process; in this embodiment, the horizontal spacing between the two lower axle pins 10 close to the upper side is 12m, and the horizontal spacing between the two lower axle pins 10 close to the lower side is 10m.

[0022] In practical applications, the upper balancing beam 1 can be used alone; specifically, according to the length of the steel pipe pile to be lifted, the appropriate lifting distance is determined, and then a group of symmetrically arranged lower axle pins 10 in the upper balancing beam 1 are connected to the steel pipe pile to be lifted through a sling, so as to realize the lifting operation of small-sized and light-weight steel pipe piles, so that there is no need to add additional lifting equipment for this type of steel pipe piles on the operating ship.

[0023] As another preferred technical solution of this embodiment, see Figure 4 A working platform 15 is symmetrically fixed on both sides of the front beam plate of the upper balance hanging beam 1, specifically below the two upper connecting parts 3, to meet the needs of hanging wire ropes; preferably, the length of the working platform 15 is 1500mm and the width is 700mm.

[0024] See also Figure 3 The cross hook 2 includes a connecting pin 6, a rotating bearing 13 and four claw hooks 12; wherein the rotating bearing 13 is arranged horizontally, and the four claw hooks 12 are evenly fixed on the annular outer wall of the outer ring of the rotating bearing 13 with the claws facing upward and along the circumferential direction of the rotating bearing 13; the connecting pin 6 is composed of a connecting ring and a connecting body that are connected and integrally formed in sequence from top to bottom, so that the top end of the connecting pin 6 is connected to the upper balance beam 1 by setting the connecting ring on the outside of the connecting shaft pin 5; a connecting plate is provided on the outer wall of the bottom end of the connecting body of the connecting pin 6, and the connecting plate is fixed to the inner ring of the rotating bearing 13 by a plurality of connecting bolts evenly arranged along the circumferential direction, so that the bottom end of the connecting pin 6 is connected to the rotating bearing 13.

[0025] In actual application, the cross hook 2 is hung on the lower side of the upper balancing beam 1, and the four claw hooks 12 thereon can freely rotate 360° in the circumferential direction relative to the upper balancing beam 1 by rotating the outer ring of the bearing 13, so as to realize the free adjustment of the lifting angle according to the actual working conditions; wherein, the size and load-bearing capacity of the four claw hooks 12 are consistent to ensure the balance of the lifting process.

[0026] As a preferred technical solution of this embodiment, the cross hook 2 also includes four anti-drop chains 14, which are evenly distributed along the circumferential direction of the connecting pin 6; one end of each anti-drop chain 14 is fixed on the connecting pin 6, and the other end thereof is detachably connected to the hook end of the adjacent claw hook 12 to prevent the sling mounted on the claw hook 12 from falling off the claw hook 12 during the lifting process, thereby ensuring the safety of the pile turning process; in this embodiment, a shackle is installed at the other end of the anti-drop chain 14, and correspondingly, a connecting ring is passed through the hook end of the claw hook 12, so that the other end of the anti-drop chain 14 is detachably connected to the connecting ring at the hook end of the claw hook 12 through the shackle.

[0027] See also Figure 1 The rigging 7 is two circular slings of the same length, one side of which is respectively sleeved on two claw hooks 12 located at opposite positions, and the other side of which is respectively sleeved on the upper hanging points at both ends of the lower balanced hanging beam 8. The lower hanging points on both sides of the lower balanced hanging beam 8 are respectively sleeved and connected with the two hanging points on the steel pipe piles to be constructed on the transport ship through two other slings.

[0028] See also Figure 1 The lower balance hanging beam 8 includes an inverted U-shaped beam body, and the two ends of the front and rear side walls of the beam body extend outward in the horizontal direction and form connecting plates. An upper connecting shaft and a lower connecting shaft are horizontally passed through and fixed between the two connecting plates at each end to serve as upper and lower hanging points; the two upper connecting shafts and the two lower connecting shafts are symmetrically arranged on both sides of the inverted U-shaped beam body; among them, the two upper connecting shafts are used to set the two circular slings of the rigging 7, and the two lower connecting shafts are used to set the two slings connected to the steel pipe piles.

[0029] In this embodiment, the upper balance beam 1, the cross hook 2 and the lower balance beam 8 of the cross hook beam for offshore wind power are made of but not limited to high-strength low-alloy steel, such as ASTM, A588 or S355J2, to ensure sufficient structural strength and toughness.

[0030] In actual applications, the sizes of the above-mentioned components of the cross hook beam for offshore wind power are designed and determined according to the lifting weight requirements. When the lifting weight in actual applications is large, the sizes of the components are relatively increased. Example 2

[0031] See also Figure 5A construction method of a single-ship pile turning device implemented by using the cross hook hanging beam of Example 1, the specific implementation steps are as follows: S1. Load the cross hook beam 17 onto a ship and transport it to the construction sea area, and remove the fixing device between it and the transport ship; connect the two main hooks 16 of the crane ship to the two upper shaft pins 9 of the upper balance beam 1 in the cross hook beam 17 through the lifting sling 19 to complete the connection between the beam and the crane ship; sleeve one side of the two circular slings of the rigging 7 on the two opposite claw hooks 12 and install the anti-slip chain 14 to prevent slipping; sleeve the other side of the two circular slings of the rigging 7 on the two upper connecting shafts of the lower balance beam 8 to complete the assembly of the cross hook 2 and the lower balance beam 8; S2, one side of two steel pipe pile slings 21 is respectively sleeved on the two lower connecting shafts of the lower balance hanging beam 8, and the other side is sleeved on the two lifting points in the middle of the steel pipe pile 18; one side of a tail sling 20 is sleeved on a claw hook 12 (without installing the anti-drop chain 14), and the other side is connected to the tail end of the steel pipe pile 18 through a clamp; wherein the length of the tail sling 20 is greater than the length of the steel pipe pile sling 21, so that the steel pipe pile 18 is lifted obliquely to mid-air; S3, the double main hooks 16 of the crane ship are gradually lifted, so that the steel pipe pile 18 initially set horizontally on the transport barge is gradually lifted up to be separated from the hull; since the length of the tail sling 20 is greater than the length of the steel pipe pile sling 21, as the steel pipe pile sling 21 and the tail sling 20 are successively tightened, the steel pipe pile 18 is finally lifted up to the mid-air in an oblique setting, and lifted up to a height that can be moved horizontally; S4, the steel pipe pile 18 is horizontally moved to the top of the designated pile position, and then the double main hooks 16 of the crane ship are gradually and slowly lowered, so that the steel pipe pile 18 is gradually lowered into the water until one end of the steel pipe pile 18 contacts the underwater mud surface; at this time, the steel pipe pile 18 is continued to be lowered, so that its oblique angle is gradually reduced, and the steel pipe pile sling 21 is always kept in a taut state, and the tail sling 20 is gradually relaxed and automatically falls off from the claw hook 12 under the action of buoyancy; in actual operation, the tail sling 20 is also connected to the auxiliary hook of the crane ship through a connecting rope (the connecting rope does not interfere with the entire operation process of the tail sling 20, and only maintains a connection relationship), so that after the tail sling 20 falls off from the cross hook beam 17, the auxiliary hook lifts the tail sling 20 and the clamp back to the ship for recovery; S5, the double main hooks 16 of the crane ship are gradually lifted, and at this time, one end of the steel pipe pile 18 is kept supported on the mud surface due to the lack of the restriction of the tail sling 20. As the cross hook lifting beam is lifted, the other end of the steel pipe pile 18 is gradually turned upward under the action of the steel pipe pile sling, that is, it is turned upward from the oblique setting state to the vertical state; when the steel pipe pile 18 is turned to the vertical state, the double main hooks 16 of the crane ship stop lifting, and the pile turning is completed; S6, the double main hooks 16 of the crane ship are slowly lowered to cooperate with the steel pipe pile to sink under the action of gravity; in this process, the double main hooks of the crane ship control the lowering speed of the two respectively to continuously adjust the verticality of the steel pipe pile 18; S7, after the steel pipe pile 18 self-sinks stably, the double main hooks 16 of the crane ship continue to be lowered, so that the steel pipe pile sling 21 falls off from the lifting point of the steel pipe pile 18, and then the lifting beam can be moved to the next steel pipe pile 18 to be hoisted by the double main hooks 16 of the crane ship; the operating personnel continue the subsequent pile sinking operation on the steel pipe pile 18.

[0032] The single-ship pile-turning device construction method realized by the cross-hook lifting beam has been successfully applied in offshore wind power projects. In actual application, it saves the construction time of steel pipe pile turning, effectively solves the subsequent problem of pile turning in single-ship machine construction of single pile foundation of deep-sea offshore wind power, and has good application and promotion prospects.

[0033] Parts of the present invention that are not disclosed in detail belong to the common knowledge in the art. Although the above describes the illustrative specific embodiments of the present invention to facilitate the understanding of the present invention by those skilled in the art, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. A cross hook beam for offshore wind power, characterized in that: The invention comprises an upper balancing beam (1), a cross hook (2), a rigging (7) and a lower balancing beam (8) which are arranged in sequence from top to bottom; wherein the upper balancing beam (1) comprises a horizontally arranged beam body, two upper shaft pins (9) are symmetrically and horizontally fixed at the two ends of the top side, and a connecting shaft pin (5) is horizontally fixed at the middle part of the bottom side; the cross hook (2) comprises a rotating bearing (13), a connecting pin (6) is provided at the top of the inner ring of the bearing, and four claw hooks (12) are evenly distributed along the circumferential direction on the annular outer wall of the outer ring of the bearing; the connecting pin (6) is sleeved on the connecting shaft pin (5) through a connecting ring at the top end; the four claw hooks (12) are arranged in a manner that the claws face upward; the rigging (7) is two annular slings of the same length, one side of the two ropes is respectively sleeved on the two counter-positioning claw hooks (12), and the other side of the two ropes is respectively sleeved on the upper hanging points at the two ends of the lower balancing beam (8), and the two ends of the lower balancing beam (8) are also provided with lower hanging points.

2. The cross hook beam for offshore wind power according to claim 1, characterized in that: The beam body of the upper balance suspension beam (1) comprises a front beam plate and a rear beam plate which are arranged vertically and in parallel, and a connecting beam is arranged horizontally and centrally between the two beam plates, so that the front beam plate and the rear beam plate are connected and fixed as a whole through the connecting beam; the top ends of the front beam plate and the rear beam plate extend upward and form upper connecting parts (3), and two upper shaft pins (9) are respectively horizontally penetrated and fixed on the two upper connecting parts (3) on each side; the middle part of the bottom side of the front beam plate and the rear beam plate extends downward and forms a first lower connecting part (11), and the connecting shaft pin (5) is horizontally penetrated and fixed on the two first lower connecting parts (11).

3. The cross hook beam for offshore wind power according to claim 1, characterized in that: Two groups of axle pins are arranged at both ends of the bottom side of the beam body of the upper balance suspension beam (1), each group of axle pins is composed of two lower axle pins (10) that are horizontally fixed and symmetrically arranged on the beam body, and the spacing between the lower axle pins (10) in the two groups of axle pins is arranged differently.

4. The cross hook beam for offshore wind power according to claim 2, characterized in that: Two working platforms (15) are symmetrically fixed on the upper side of the beam plate on one side of the upper balance hanging beam (1).

5. The cross hook beam for offshore wind power according to claim 1, characterized in that: The cross hook (2) further comprises four anti-drop chains (14) which are evenly distributed along the circumferential direction of the connecting pin (6); one end of each anti-drop chain (14) is fixed to the connecting pin (6), and the other end is detachably connected to the hook claw end of the adjacent hook (12).

6. The cross hook beam for offshore wind power according to claim 1, characterized in that: The lower balance suspension beam (8) comprises an inverted U-shaped beam body, the two ends of the front and rear side walls of the beam body respectively extend outward in the horizontal direction and form connecting plates, an upper connecting shaft and a lower connecting shaft arranged at intervals are horizontally fixed between the two connecting plates at each end, and the two upper connecting shafts and the two lower connecting shafts are symmetrically arranged at the two ends of the inverted U-shaped beam body.

7. A single-ship pile turning construction method using the cross-hook lifting beam for offshore wind power as claimed in any one of claims 1 to 6, characterized in that: Here are the steps: S1. Connect the two main hooks of the crane ship to the two upper shaft pins (9) of the upper balance beam (1) through slings, and sleeve one side of the two circular slings of the rigging (7) on the two counter-position claw hooks (12) and the other side on the two upper hanging points of the lower balance beam (8); S2, one side of two steel pipe pile slings is respectively sleeved on two lower sling points of the lower balance sling beam (8), and the other side is sleeved on two sling points on the opposite sides of the steel pipe pile body; one side of a tail sling is sleeved on another claw hook (12), and the other side is connected to the tail end of the steel pipe pile through a clamp; wherein the length of the tail sling is greater than the length of the steel pipe pile sling, so that the steel pipe pile can be lifted obliquely to mid-air; S3. The double main hooks of the crane ship are gradually lifted, so that the steel pipe piles initially set horizontally on the hull are gradually lifted, and the steel pipe piles are lifted to the horizontal transfer height position in the state of being set obliquely; S4. The double main hooks of the crane ship drive the steel pipe pile to move horizontally to the top of the designated pile position, and then slowly lower it into the water until one end of the steel pipe pile contacts the underwater mud surface; the steel pipe pile is continuously lowered, so that the oblique angle of the steel pipe pile decreases, and the tail rope automatically falls off from the claw hook (12) due to relaxation; S5. The double main hooks of the crane ship are gradually lifted, so that the steel pipe pile with one end supported on the mud surface is gradually turned upward until it reaches a vertical state. At this time, the double main hooks of the crane ship stop lifting and the pile turning is completed; S6. The double main hooks of the crane ship are slowly lowered to cooperate with the steel pipe pile to sink by itself under the action of gravity while keeping the steel pipe pile sinking vertically; S7. After the steel pipe pile is self-sinking and stable, the double main hooks of the crane ship continue to be lowered to make the steel pipe pile lifting cable fall off from the lifting point of the steel pipe pile. Then the cross hook lifting beam is moved to the next steel pipe pile to be lifted on the ship through the double main hooks of the crane ship. The operating personnel continue the subsequent pile sinking operation on the self-sinking and stable steel pipe pile.

8. The single-ship pile turning construction method according to claim 7 is characterized in that: In step S2, the length of the tail rope is sufficient to lift the steel pipe pile into the air at an angle of 15° to 20°.

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