A device and construction method for hoisting a steel pipe pile without a lifting lug

Abstract

The present invention discloses a device and a construction method for hoisting a steel pipe pile without a lifting lug. The device is composed of a pile gripper, a turning sling, a shackle and a steel wire rope. Among them: the pile gripper includes a pile gripper main structure, four clamps, a pile gripper lifting lug, two turning lifting points, a pin structure and a hydraulic structure; the main hook of the floating crane is connected with the pile gripper lifting lug through a steel wire rope to form a front pile hoisting device for the steel pipe pile; the auxiliary hook of the floating crane is connected with the sling lifting lug at the top of the turning sling through a steel wire rope to form a bottom pile turning device for the steel pipe pile. The present invention realizes the hoisting of a steel pipe pile without a lifting lug, and has the advantages of simple composition structure, convenient construction, simple operation, no need to set a lifting lug outside the steel pipe pile, reducing the manufacturing process of the steel pipe pile; the pile gripper can ensure that the steel pipe pile smoothly passes through the guiding device and ensure the verticality; the turning sling ensures that after the steel pipe pile is hoisted, it can be rotated from horizontal to vertical to meet the hoisting requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation construction for wind power projects, and in particular to a device and construction method for lifting a steel pipe pile without a lifting lug. Background Art

[0002] Currently, in the foundation construction of wind power projects, steel pipe piles are required as the bearing foundation for wind turbines. In order to transport and store the steel pipe piles and complete operations such as vertical lifting, displacement, and turning over of the steel piles, lifting lugs need to be installed on the steel pipe piles; in traditional steel pipe pile hoisting, a pipe-axis type lifting lug is often used to assist construction, which is a lifting lug welded by steel pipes to provide a force-bearing position for the lifting tool. There are problems such as complex processing and cumbersome procedures of the pipe-axis type lifting lug during the manufacturing of steel pipe piles, which in turn affect the processing time of steel pipe piles, increase the manufacturing cycle, and affect the construction progress; during construction, there are problems such as the size of the lifting lug not matching the shackle, the fixed installation direction of the lifting lug resulting in the lifting rope only being able to rotate in the round hole when the lifting rope directions are different, large friction and easy damage to the lifting rope, the unfavorable layout position of the lifting lug for subsequent construction, small working space, and difficulty in cutting off the lifting lug. Not only do these problems exist with the shaft type lifting lug, but more importantly, for some steel pipe piles due to their structural characteristics, such as high requirements for the jacking accuracy of the steel pipe pile, the lifting lug may affect its passage through the positioning ring and other situations. Summary of the Invention

[0003] The first object of the present invention is to provide a device for lifting a steel pipe pile without a lifting lug, which is convenient for unhooking, has high construction efficiency, reduces the construction safety risk, and reduces the damage to the steel pipe pile caused by cutting off the lifting lug.

[0004] The second object of the present invention is to provide a construction method for lifting a steel pipe pile without a lifting lug.

[0005] The first object of the present invention is achieved as follows:

[0006] A device for lifting a steel pipe pile without a lifting lug is composed of a pile gripper, a turning-over lifting tool, a shackle, and a steel wire rope, wherein:

[0007] The pile gripper includes a pile-gripping main structure, four clamps, a pile-gripper lifting lug, two turning-over lifting points, a pin structure, and a hydraulic structure. At the bottom of the main structure, there are sliding tracks arranged in a cross shape. On each sliding track, there is a clamp. The four clamps form a planar square. The four clamps can move on the sliding tracks under the action of the hydraulic structure and are fixed by the pin structure, so as to be applicable to steel pipe piles of different diameters and meet the lifting of steel pipe piles. On each clamp, there are dense teeth. The dense teeth clamp the outer wall of the steel pipe pile under the action of the hydraulic structure, ensuring that the frictional force generated between the clamp and the inner and outer walls of the steel pipe pile is greater than the self-weight of the steel pipe pile during lifting. On the side of the pile-gripping main structure, there are two turning-over lifting points placed side by side. Since steel pipe piles are usually transported and stored horizontally, the pile gripper needs to be vertically rotated to horizontal through the turning-over lifting points to facilitate the docking of the clamp and the steel pipe pile. At the top of the pile-gripping main structure, there is a pile-gripper lifting lug.

[0008] The turning-over lifting tool is an integral cuboid steel structure. On the right side of the turning-over lifting tool, there is an arc-shaped inclined opening with a "C"-shaped cross-section. The arc surface of the arc-shaped inclined opening can adapt to the curved surface radian of the bottom of the steel pipe pile. At the top of the turning-over lifting tool, there is a lifting-tool lifting lug. On the left side of the turning-over lifting tool, there is an auxiliary lifting lug, which plays the role of an auxiliary hook during hoisting and installation.

[0009] The main hook of the floating crane is connected to the pile-gripper lifting lug of the pile gripper through a steel wire rope, forming a front pile-lifting device for the steel pipe pile. The auxiliary hook of the floating crane is connected to the lifting-tool lifting lug at the top of the turning-over lifting tool through a steel wire rope, forming a bottom pile-turning-over device for the steel pipe pile.

[0010] The second object of the present invention is achieved as follows:

[0011] A construction method for lifting a steel pipe pile without a lifting lug includes the following steps:

[0012] S1. Preparation before lifting: Connect the main hook of the floating crane and the auxiliary hook of the floating crane to the steel wire ropes respectively. The steel wire ropes are then connected to the pile-gripper lifting lug of the pile gripper and the lifting-tool lifting lug at the top of the turning-over lifting tool to complete the assembly of the steel pipe pile lifting device.

[0013] S2. Adjust the distance between the four clamps of the pile gripper according to the diameter and wall thickness of the steel pipe pile.

[0014] S3. Through the floating crane and manual assistance, align the pile gripper and the turning-over lifting tool.

[0015] S4. After alignment, adjust the lifting center of the steel pipe pile to ensure that the top and bottom of the steel pipe pile are lifted simultaneously.

[0016] S5. Transfer the steel pipe pile to an open area. Use the auxiliary hook on the main hook of the floating crane to connect the turning lifting point of the pile gripper through the auxiliary hook steel wire rope, complete the vertical-to-horizontal rotation of the main structure of the pile gripper for clamping, place the pile gripper in front of the top of the steel pipe pile, and ensure that they are on the same straight line. Slowly move the pile gripper towards the steel pipe pile. When the top of the steel pipe pile enters the range of the dense teeth of the fixture, after the four fixtures move to appropriate positions on the sliding track, fix them through the pin structure to prevent the four fixtures from sliding backward. The dense teeth on each fixture clamp the top of the steel pipe pile under the action of the hydraulic structure. At this time, lower the auxiliary hook on the main hook of the floating crane and remove the auxiliary hook steel wire rope;

[0017] S6. Use the auxiliary hook of the floating crane to lift the turning lifting tool to the tail of the steel pipe pile, and push the C-shaped arc surface bevel into the bottom of the steel pipe pile; Lift the pile gripper and the turning lifting tool simultaneously and slowly rotate them vertically. After the vertical rotation of the steel pipe pile is completed, the turning lifting tool automatically falls off by its own weight to complete unhooking; The pile gripper vertically lifts the steel pipe pile steadily;

[0018] S7. After the steel pipe pile is vertical, carry out the pile insertion operation.

[0019] Therefore, the present invention realizes the lifting of the steel pipe pile without a lifting lug, and has the advantages of simple composition structure, convenient construction and simple operation. There is no need to set a lifting lug outside the steel pipe pile, which reduces the manufacturing process of the steel pipe pile; The pile gripper can ensure that the steel pipe pile passes through the guiding device smoothly and guarantee the verticality; The turning lifting tool ensures that after the steel pipe pile is lifted, it can be rotated from horizontal to vertical to meet the lifting requirements; The pile gripper and the turning lifting tool are simple to operate and convenient to unhook. The whole process of turning the pile and placing the pile is fully automated, with simple operation, safety and reliability, saving construction time, improving construction efficiency and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the pile gripper of the present invention;

[0021] Figure 2 is Figure 1 the top view of;

[0022] Figure 3 is Figure 2 the bottom view of;

[0023] Figure 4 is a schematic structural diagram of the turning lifting tool of the present invention;

[0024] Figure 5 is Figure 4 the top view of;

[0025] Figure 6 is Figure 4 the left view of;

[0026] Figure 7 is a usage state diagram of the present invention;

[0027] Figure 8 For Figure 7 the right figure of Specific implementation manner

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0029] A device for lifting a steel pipe pile without a lifting lug is composed of a pile gripper 1, a turning sling 9, shackles and a steel wire rope 14, wherein:

[0030] The pile gripper 1 includes a pile gripping main structure 2, four clamps 3, a pile gripper lifting lug 4, two turning lifting points 5, a pin structure 8 and a hydraulic structure; a sliding track 6 arranged in a cross shape is provided at the bottom of the main structure 2, and a clamp 3 is provided on each sliding track 6. The four clamps 3 form a planar square, and the four clamps 3 can move on the sliding track 6 under the action of the hydraulic structure and are fixed by the pin structure 8, so as to be applicable to steel pipe piles 15 with different diameters and meet the lifting of the steel pipe piles 15; dense teeth 7 are provided on each clamp 3, and the dense teeth 7 clamp the outer wall of the steel pipe pile 15 under the action of the hydraulic structure, ensuring that the friction force generated between the clamp 3 and the inner and outer walls of the steel pipe pile 15 is greater than the self-weight of the steel pipe pile 15 during lifting; two turning lifting points 5 arranged side by side are provided on the side of the pile gripping main structure 2. Since the steel pipe pile 15 is usually transported and stored horizontally, the pile gripper 1 needs to be vertically rotated to horizontal through the turning lifting points 5 to facilitate the docking of the clamp 3 and the steel pipe pile 15; a pile gripper lifting lug 4 is provided at the top of the pile gripping main structure 2;

[0031] The turning sling 9 is an integral rectangular steel structure. An arc-shaped bevel 11 with a "C"-shaped cross-section is provided on the right side surface of the turning sling 9. The arc surface of the arc-shaped bevel 11 can adapt to the curved surface radian of the bottom of the steel pipe pile 15. A sling lifting lug 10 is provided at the top of the turning sling 9, and an auxiliary lifting lug 12 is provided on the left side surface of the turning sling 9, which plays the role of an auxiliary hook during hoisting and installation;

[0032] The main hook 13 of the floating crane is connected with the pile gripper lifting lug 4 of the pile gripper 1 through the steel wire rope 14 to form a front pile lifting device for the steel pipe pile 15; the auxiliary hook 16 of the floating crane is connected with the sling lifting lug 10 at the top of the turning sling 9 through the steel wire rope 14 to form a bottom pile turning device for the steel pipe pile 15.

[0033] A construction method for lifting a steel pipe pile without a lifting lug includes the following steps:

[0034] S1. Preparation work before lifting: Connect the main hook 13 of the floating crane and the auxiliary hook 16 of the floating crane with the steel wire rope 14 respectively, and then connect the steel wire rope 14 to the pile gripper lifting lug 4 of the pile gripper 1 and the sling lifting lug 10 at the top of the turning sling 9 to complete the assembly of the lifting device for the steel pipe pile 15;

[0035] S2. Adjust the spacing of the four clamps 3 of the pile gripper 1 according to the diameter and wall thickness of the steel pipe pile 15;

[0036] S3. Through the assistance of a floating crane and manpower, align the pile gripper 1 and the turning sling 9;

[0037] S4. After the alignment is completed, adjust the hoisting center of the steel pipe pile 15 to ensure that the top 17 and the bottom 18 of the steel pipe pile 15 are hoisted simultaneously;

[0038] S5. Transfer the steel pipe pile 15 to an open area. Use the auxiliary hook on the main hook 13 of the floating crane to connect the turning lifting point 5 of the pile gripper 1 through the auxiliary hook wire rope, complete the vertical-to-horizontal rotation of the clamping main structure 2 of the pile gripper 1, place the pile gripper 1 in front of the top 17 of the steel pipe pile 15, and the two are on the same straight line. Slowly move the pile gripper 1 towards the steel pipe pile 15. When the top 17 of the steel pipe pile 15 enters the range of the dense teeth 7 of the clamp 3, after the four clamps 3 move to the appropriate positions on the sliding track 6, fix them through the pin structure 8 to prevent the four clamps 3 from sliding backward. The dense teeth 7 on each clamp 3 clamp the top 17 of the steel pipe pile 15 under the action of the hydraulic structure. At this time, lower the auxiliary hook on the main hook 13 of the floating crane and remove the auxiliary hook wire rope;

[0039] S6. Use the auxiliary hook 16 of the floating crane to lift the turning sling 9 to the tail of the steel pipe pile 15, and push the C-shaped arc surface bevel 11 into the bottom 18 of the steel pipe pile 15; the pile gripper 1 and the turning sling 9 are hoisted simultaneously and slowly rotated vertically. After the vertical rotation of the steel pipe pile 15 is completed, the turning sling 9 automatically falls off by its own weight to complete unhooking; the pile gripper 1 vertically hoists the steel pipe pile 15 steadily;

[0040] S7. After the steel pipe pile 15 is vertical, carry out the pile driving operation.

[0041] Anyone should know that the adjustments made under the inspiration of the present invention, all technical solutions that are the same as or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A device for lifting a steel pipe pile without a lifting lug, characterized in that: It consists of a pile gripper, a turning sling, a shackle and a steel wire rope, where: The pile gripper includes a pile-gripping main structure, four clamps, pile-gripper lifting lugs, two turning lifting points, a pin structure and a hydraulic structure; at the bottom of the main structure, there are sliding tracks arranged in a cross shape, and one clamp is provided on each sliding track. The four clamps form a plane square. The four clamps can move on the sliding tracks under the action of the hydraulic structure and are fixed by the pin structure, so as to be applicable to steel pipe piles of different diameters and meet the lifting of steel pipe piles; on each clamp, there are dense teeth, and the dense teeth clamp the outer wall of the steel pipe pile under the action of the hydraulic structure, ensuring that the friction force generated between the clamp and the inner and outer walls of the steel pipe pile is greater than the self-weight of the steel pipe pile during lifting; on the side of the pile-gripping main structure, there are two turning lifting points placed side by side. Since the steel pipe pile is transported and stored horizontally, the pile gripper needs to be vertically rotated to horizontal through the turning lifting points to facilitate the docking of the clamp and the steel pipe pile; at the top of the pile-gripping main structure, there are pile-gripper lifting lugs; The turning sling is an integral rectangular steel structure. On the right side of the turning sling, there is an arc-shaped bevel with a "C"-shaped cross-section. The arc surface of the arc-shaped bevel can adapt to the curved surface radian of the bottom of the steel pipe pile. At the top of the turning sling, there is a sling lifting lug, and on the left side of the turning sling, there is an auxiliary lifting lug, which plays the role of an auxiliary hook during hoisting and installation; The main hook of the floating crane is connected to the pile-gripper lifting lug through a steel wire rope, forming a front pile-lifting device for the steel pipe pile; the auxiliary hook of the floating crane is connected to the sling lifting lug at the top of the turning sling through a steel wire rope, forming a bottom pile-turning device for the steel pipe pile.

2. A construction method for the device for lifting a steel pipe pile without a lifting lug according to claim 1, characterized in that: It includes the following steps: S1. Preparation before lifting: Connect the main hook and the auxiliary hook of the floating crane to the steel wire rope respectively, and then connect the steel wire rope to the pile-gripper lifting lug of the pile gripper and the sling lifting lug at the top of the turning sling to complete the assembly of the steel pipe pile lifting device; S2. Adjust the spacing of the four clamps of the pile gripper according to the diameter and wall thickness of the steel pipe pile; S3. Through the floating crane and manual assistance, align the pile gripper and the turning sling; S4. After alignment, adjust the lifting center of the steel pipe pile to ensure that the top and bottom of the steel pipe pile are lifted simultaneously; S5. Transfer the steel pipe pile to an open space. Use the auxiliary hook on the main hook of the floating crane to connect the turning lifting point of the pile gripper through the auxiliary hook steel wire rope to complete the vertical rotation of the pile-gripping main structure of the pile gripper to horizontal. Place the pile gripper in front of the top of the steel pipe pile, and the two are on the same straight line. Slowly move the pile gripper towards the steel pipe pile. When the top of the steel pipe pile enters the range of the dense teeth of the clamp, after the four clamps move to the appropriate positions on the sliding tracks, fix them through the pin structure to prevent the four clamps from sliding backward. The dense teeth on each clamp clamp the top of the steel pipe pile under the action of the hydraulic structure. At this time, lower the auxiliary hook on the main hook of the floating crane and remove the auxiliary hook steel wire rope; S6. Use the auxiliary hook of the floating crane to lift the turning sling to the tail of the steel pipe pile, and push the C-shaped arc bevel into the bottom of the steel pipe pile; lift the pile gripper and the turning sling simultaneously and slowly rotate them vertically. After the steel pipe pile is vertically rotated, the turning sling automatically falls off by its own weight to complete unhooking; the pile gripper vertically and steadily lifts the steel pipe pile; S7. After the steel pipe pile is vertical, carry out pile insertion operation.

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