Multi-point lifting device and method for large-diameter super-long PHC pipe pile

Abstract

The invention relates to a multi-point lifting device and method for a large-diameter super-long PHC pipe pile, the device comprises a pile frame, the top of the pile frame is provided with winding equipment, and the winding equipment is connected with a plurality of first traction ropes; and each first lifting hook assembly comprises a first hook rope and a first pulley provided with a first pulling rope connecting piece, the first hook rope is wound on the first pulley, the two ends of the first hook rope extend downwards to be provided with a to-be-lifted piece connecting assembly, and each first pulling rope connecting piece is connected with one first pulling rope. According to the actual measurement length of the PHC pipe pile, the multiple installation parts are arranged for the ultra-long PHC pipe pile, each first lifting hook assembly is correspondingly connected with the two installation parts, it is ensured that pressure is dispersed, the stability is improved, through cooperation of the multiple first lifting hook assemblies, the stability and safety of lifting are improved, and the possibility of accident occurrence is reduced. All the assemblies can be adjusted according to the sizes and the weights of different pipe piles, and the compatibility of the device and the method is improved.

Description

Technical Field

[0001] This application relates to the technical field of pile foundation construction, and particularly to a multi-point lifting device and method for large-diameter super-long PHC pipe piles. Background Art

[0002] As a pile foundation, PHC pipe piles are widely used in building and wharf projects. Currently, they are gradually being applied in bridge foundations and even in cross-sea bridges with complex sea conditions. Due to the complex and changeable sea conditions, using a pile driving vessel to insert the entire PHC pipe pile at one time has high construction efficiency and low safety risks.

[0003] The prior art only addresses the erection construction of PHC pipe piles with a length less than 70m. For the erection construction of super-long PHC pipe piles, that is, PHC pipe piles greater than 70m, the distribution of lifting points is uneven and insufficient, lacking a more suitable erection device, and there are unstable safety risks during the erection process. Summary of the Invention

[0004] Embodiments of this application provide a multi-point lifting device and method for large-diameter super-long PHC pipe piles to solve the technical problem of unstable safety risks during the erection construction of super-long PHC pipe piles in the related art.

[0005] In a first aspect, a multi-point lifting device for large-diameter super-long PHC pipe piles is provided, which includes: a pile frame with a hoisting device at its top, and a plurality of first towing ropes are connected to the hoisting device; at least three first hook assemblies, each first hook assembly includes a first hanging rope and a first pulley provided with a first towing rope connector, the first hanging rope is wound around the first pulley, and its two ends extend downward to be provided with a component for connecting the workpiece to be lifted, and each first towing rope connector connects a first towing rope.

[0006] In some embodiments, it further includes a second hook assembly; the number of first hook assemblies is three and they are distributed along the length direction of the workpiece to be lifted. Among them, the first towing rope connector of the leftmost first hook assembly connects a first towing rope; the two first hook assemblies in the middle and on the right are connected to the same second hook assembly and connect a first towing rope; the second hook assembly includes a second hanging rope and a second pulley, the second pulley is connected to the first towing rope by setting a second towing rope connector, the second hanging rope is wound around the second pulley, and the first towing rope connectors of the two first hook assemblies in the middle and on the right are respectively connected to both ends of the second hanging rope.

[0007] In some embodiments, a second towing rope is connected to the hoisting device; one end of the second towing rope is connected to the hoisting device, and the other end is connected to the component for connecting the workpiece to be lifted through a hook.

[0008] In some embodiments, the component for connecting the piece to be lifted includes a snap ring and an annular wire rope; the snap ring is fixedly arranged on the annular wire rope, and the annular wire rope is used for sleeving on the piece to be lifted.

[0009] In some embodiments, a hydraulic hammer is arranged on the pile frame and slides along the length direction of the pile frame, and a pile gripper is arranged near the bottom of the pile frame to fix the piece to be lifted in a vertical state.

[0010] In a second aspect, a method for multi-point lifting of large-diameter and extra-long PHC pipe piles is provided, which includes: based on the measured length of the piece to be lifted, setting a plurality of lifting connection parts on the piece to be lifted; correspondingly arranging the first hook assembly at the lifting connection parts and connecting it to the hoisting equipment through the first towing rope; starting the hoisting equipment to gradually turn the piece to be lifted in a horizontal state to a vertical state; and fixing the piece to be lifted in a vertical state on the pile frame.

[0011] In some embodiments, based on the measured length of the piece to be lifted, setting a plurality of lifting parts on the piece to be lifted includes the following steps: obtaining the measured length of the piece to be lifted, calculating the number and positions of the lifting connection parts according to the measured length, and making marks at the corresponding positions.

[0012] In some embodiments, correspondingly connecting the first hook assembly to the lifting connection parts and connecting it to the hoisting equipment through the first towing rope includes the following steps: setting the number of the lifting connection parts as n, and based on the set number of the lifting connection parts, the installation number of the first hook assembly is n / 2; arranging the component for connecting the piece to be lifted of the first hook assembly at the corresponding lifting connection parts; according to the actual lifting design requirements, the first towing rope is respectively connected to the first hook assembly and the second hook assembly.

[0013] In some embodiments, starting the hoisting equipment to gradually turn the piece to be lifted in a horizontal state to a vertical state includes the following steps: starting the hoisting equipment, applying force simultaneously by a plurality of first towing ropes to slowly lift the piece to be lifted off the ground; the first towing rope on one side pulls the piece to be lifted to an inclined state, and the remaining first towing ropes act on the lower inclined part of the piece to be lifted to stabilize the piece to be lifted until the piece to be lifted turns to a vertical state.

[0014] In some embodiments, fixing the piece to be lifted in a vertical state on the pile frame includes the following steps: connecting the component for connecting the piece to be lifted on the second towing rope to the piece to be lifted, and the hoisting equipment drives the second towing rope to hold the piece to be lifted in a vertical state against the pile frame; slowly lowering the hydraulic hammer to sleeve and fix the piece to be lifted; starting the pile gripper to clamp and fix the piece to be lifted.

[0015] The beneficial effects brought by the technical solution provided in this application include:

[0016] The embodiments of the present application provide a multi-point lifting device and method for large-diameter and extra-long PHC pipe piles. Among them, a plurality of lifting joints are reasonably arranged on the piece to be lifted according to the actually measured length obtained by measurement. The positions of the lifting joints are selected considering the center-of-gravity distribution and stress dispersion, ensuring balance during the lifting process; at least three first hook assemblies are provided, that is, according to the actually measured length of the PHC pipe pile, for extra-long PHC pipe piles, a plurality of installation parts are set, and each first hook assembly is correspondingly connected to two installation parts, ensuring pressure dispersion and improving stability. Through the cooperation of a plurality of first hook assemblies, the stability and safety of lifting are improved, and the possibility of accidents is reduced. Each component can be adjusted according to the sizes and weights of different pipe piles, enhancing the compatibility of the device and method, thereby solving the technical problem of unstable safety risks in the erection construction process of extra-long PHC pipe piles in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the initial structure of the six-point lifting device provided by the embodiment of the present application;

[0019] Figure 2 Schematic diagram of the structure during the lifting and rotation process of the six-point lifting device provided by the embodiment of the present application;

[0020] Figure 3 Schematic diagram of the fixed structure after the lifting and rotation of the six-point lifting device provided by the embodiment of the present application;

[0021] Figure 4 Schematic diagram of the structure of the connecting assembly of the piece to be lifted arranged on the piece to be lifted provided by the embodiment of the present application.

[0022] In the figure: 1, pile frame; 2, first hook assembly; 21, first hook rope; 22, first pulley; 23, connecting assembly of the piece to be lifted; 231, snap ring; 232, annular steel wire rope; 3, first towing rope; 4, second hook assembly; 41, second hook rope; 42, second pulley; 5, second towing rope; 6, pile gripper; 7, piece to be lifted; 8, hydraulic hammer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0024] The embodiments of this application provide a multi-point lifting device and method for large-diameter and extra-long PHC pipe piles, which can solve the technical problem of unstable safety risks in the erection construction process of extra-long PHC pipe piles in the related art.

[0025] Since the prior art only targets the erection construction of PHC pipe piles with a length less than 70m, for the erection construction of extra-long PHC pipe piles, that is, PHC pipe piles longer than 70m, the distribution of lifting points is uneven and too few, there is a lack of a more suitable erection device, and there will be unstable safety risks during the erection process. Therefore, a device that can suppress the imbalance phenomenon existing in the erection process of such extra-long PHC pipe piles and the corresponding lifting method are designed; for six-point lifting, two main hooks are set, denoted as the left large hook and the auxiliary hook. Among them, the left large hook is decomposed into 2 lifting points by a pulley, and the auxiliary hook is decomposed into 4 lifting points by a pulley. The 6 lifting points of the right large hook and the auxiliary hook are the main power during the lifting process. Before lifting, use bundling ropes to bundle the pile according to the established lifting points and install lifting shackles, and then connect each lifting point of the left large hook and the auxiliary hook to the shackles of the bundling ropes. Then it can be started, and the PHC pipe pile is slowly lifted and rotated to the vertical state; thus, the technical problem of unstable safety risks in the erection construction process of extra-long PHC pipe piles in the related art is solved.

[0026] Reference Figures 1-4 , where Figure 1 is a schematic diagram of the initial structure of a six-point lifting device. A multi-point lifting device for large-diameter and extra-long PHC pipe piles includes: a pile frame 1, on the top of which a hoisting device is provided, and a plurality of first towing ropes 3 are connected to the hoisting device; at least three first hook assemblies 2, the first hook assembly 2 includes a first hanging rope 21 and a first pulley 22 provided with a first towing rope connector, the first hanging rope 21 is wound around the first pulley 22, and its two ends extend downward to be provided with a to-be-lifted part connection assembly 23, and each first towing rope connector is connected to a first towing rope 3.

[0027] With this structural arrangement, the pile frame 1 serves as the support structure of the entire lifting device. A hoisting device is installed at the top of the pile frame 1 to drive the ropes during the lifting process. The hoisting device has sufficient load-bearing capacity to bear the weight of large-diameter and extra-long PHC pipe piles. There are at least three first hook assemblies 2, which can disperse the load during lifting and maintain stability; the first hook rope 21 is used to hang the component to be lifted connection assembly 23, and the component to be lifted connection assembly 23 is correspondingly connected to the set part of the component to be lifted 7 to ensure the stability of the lifting and rotation. The first pulley 22 is equipped with a first traction rope connecting piece, and the first hook rope 21 is wound around this pulley to reduce friction and ensure the smoothness of the hoisting process. Each first hook assembly 2 is connected to the hoisting device by three first traction ropes 3. To ensure the integrity and stability during the hoisting process, at least three first traction ropes 3 are used to achieve uniform force. The whole process is as follows: driven by the hoisting device, the first hook assembly 2 is driven by the first traction rope 3 to gradually lift the component to be lifted 7 that is hooked. By adjusting the length of the first traction rope 3, the lifting height of the component to be lifted 7 and its inclination state during the lifting and rotation process can be controlled until it reaches the vertical state; the number of first hook assemblies 2 can be increased as needed.

[0028] In some preferred embodiments, a second hook assembly 4 is further included, and there is also a second hook assembly 4; the number of the first hook assemblies 2 is three, and they are distributed along the length direction of the component to be lifted 7. The first traction rope connecting piece of the first hook assembly 2 located on the left is connected to a first traction rope 3; the two first hook assemblies 2 located in the middle and on the right are connected to the same second hook assembly 4 and connected to a first traction rope 3; the second hook assembly 4 includes a second hook rope 41 and a second pulley 42. The second pulley 42 is connected to the first traction rope 3 by setting a second traction rope connecting piece, and the second hook rope 41 is wound around the second pulley 42. The first traction rope connecting pieces of the two first hook assemblies 2 located in the middle and on the right are respectively connected to both ends of the second hook rope 41.

[0029] In this embodiment, it should be noted that the descriptions of the left, middle, and right are all based on Figures 1-3Schematic structural diagram. Through this structural arrangement, in a preferred embodiment of the present invention, a second hook assembly 4 is added to further enhance the stability and flexibility of the lifting device. Among them, three first hook assemblies 2 are provided and distributed along the length direction of the workpiece to be lifted 7. For the structure and connection of the first hook assembly 2, please refer to the previous explanation and will not be elaborated here. In this embodiment, only one of the first hook assemblies 2 is connected to the hoisting equipment through the first towing rope 3 and is responsible for the main force of the overall lifting. The second hook assembly 3 is composed of a second hook rope 41 and a second pulley 42. Among them, the second hook rope 41 is designed specifically for connecting other components, and its two ends are respectively connected to the first pulleys 22 on the remaining two first hook assemblies 2. The second pulley 42 is provided with a second towing rope connecting member, and the second hook rope 41 is arranged around the second pulley 42 to ensure the reasonable distribution of force. Finally, the second hook assembly 4 is connected to the hoisting equipment through the first towing rope 3, which can flexibly adjust the overall posture of the lifting. The combination of three first hook assemblies 2 and one second hook assembly 4 forms a multi-point force-bearing structure to ensure the stability of the hoisting and slewing process. During the hoisting process, the first hook assembly 2 and the second hook assembly 4 work together to ensure the coordination of the mechanical properties of the workpiece to be lifted 7. It should be noted that the lifting speed of the first hook assembly 2 not connected to the second hook assembly 4 should be greater than the lifting speeds of the two first hook assemblies 2 connected to the second hook assembly 4. By adjusting the second hook assembly 4 and its connection relationship, it is convenient to meet the hoisting requirements of workpieces to be lifted 7 with different sizes and weights.

[0030] In some preferred embodiments, a second towing rope 5 is connected to the hoisting equipment. One end of the second towing rope 5 is connected to the hoisting equipment, and the other end is connected to a workpiece connection assembly 23 through a hook.

[0031] In this embodiment, through this structural arrangement, a second towing rope 5 is added to the hoisting equipment to further enhance the support and positioning ability for the workpiece to be lifted 7. One end of the second towing rope 5 is fixedly connected to the hoisting equipment to ensure that it can provide a stable linear pulling force during the hoisting process. The other end is connected to the workpiece connection assembly 23 through a hook for the longitudinal support of the workpiece to be lifted 7 to ensure its stability during the vertical placement process. The additional support function of the second towing rope 5 can effectively prevent the workpiece to be lifted 7 from tilting horizontally after the hoisting is completed, thereby improving the safety and stability of the construction. The connection method between the workpiece connection assembly 23 and the workpiece to be lifted 7 can be fixed welding or a detachable hook structure to adapt to different construction requirements. By connecting the workpiece connection assembly 23 through a hook, the second towing rope 5 can hold the workpiece to be lifted 7 against the pile frame 1 during placement, providing additional safety guarantees.

[0032] In some preferred embodiments, the component 23 for connecting the piece to be lifted includes a snap ring 231 and an annular wire rope 232; the snap ring 231 is fixedly arranged on the annular wire rope 232, and the annular wire rope 232 is used for sleeving on the piece to be lifted 7.

[0033] In this embodiment, through this structural design, the component 23 for connecting the piece to be lifted includes a snap ring 231 and an annular wire rope 232. The snap ring 231 is made of high-strength alloy steel to ensure its strength and durability under heavy loads. The snap ring 231 is fixed on the annular wire rope 232 by welding or mechanical connection to ensure its firmness. The design of the snap ring 231 allows for quick connection and release, facilitating the operators to hoist and disassemble as needed. Its structural design can effectively disperse the force on the piece to be lifted 7, making the force more uniform, thereby reducing the risk of possible damage. The diameter and material of the annular wire rope 232 should be selected according to the weight and size of the piece to be lifted 7. Generally, multi-strand wire ropes are selected to provide the best flexibility and bearing capacity. The annular wire rope 232 can be fixed on the piece to be lifted 7 through the snap ring 231, enabling the hoisting device to remain stable during the hoisting process and ensuring no slippage. The annular design also allows the wire rope 232 to evenly distribute the force around the piece to be lifted 7, reducing the damage caused by single-point force. During the entire hoisting process, the annular wire rope 232 surrounds the piece to be lifted 7, combined with the connection function of the snap ring 231, can effectively and stably hoist the piece to be lifted 7. The operator can quickly sleeve the annular wire rope 232 on the piece to be lifted 7 and fixedly connect it to the first hook assembly 2 through the snap ring 231, greatly improving the operation convenience and efficiency. The component 23 for connecting the piece to be lifted can be flexibly adjusted according to different specifications of the piece to be lifted 7 to meet the diverse construction requirements.

[0034] In some preferred embodiments, a hydraulic hammer 8 is provided on the pile frame 1 and slides along the length direction of the pile frame, and a pile gripper 6 is provided near the bottom of the pile frame 1 for fixing the piece to be lifted 7 in a vertical state.

[0035] In this embodiment, through this structural arrangement, the design of the pile frame 1 combines the functions of the hydraulic hammer 8 and the pile gripper 6, which can ensure the stability of the suspended member 7 in the vertical state. The hydraulic hammer 8 is composed of a hydraulic cylinder, a hammer body, a piston, etc., and can slide in the length direction of the pile frame 1. Its sliding mechanism is realized through guide rails to ensure its controllability on the pile frame 1. The hydraulic hammer 8 can be used to drive the pile foundation at a high frequency, providing a strong impact force through the hydraulic system to accurately drive the pile body into the ground. The pile gripper 6 is composed of a robotic arm, a clamping device, and a control system, and can be installed at a position near the bottom of the pile frame 1 to fix the suspended member 7. After the suspended member 7 is lifted to the vertical state, the pile gripper 6 can quickly clamp the suspended member to prevent it from tilting or sliding during the construction process. And when the suspended member 7 needs to be constructed, the pile gripper 6 can be quickly unlocked for subsequent pile foundation construction to ensure the continuity of the construction process. When waiting for the suspended member 7 to be lifted to the vertical state, the hydraulic hammer 8 on the pile frame 1 is in the standby state, and a hoisting device is used to slowly lift the suspended member to a position without load. Combining the design of the hydraulic system and the mechanical gripper, the entire operation process has a high degree of automation, is easy to control and monitor, and reduces the labor cost and operation difficulty.

[0036] In a second aspect, a method for multi-point lifting of large-diameter super-long PHC pipe piles is provided, which includes:

[0037] Step 1: Based on the measured length of the suspended member 7, a plurality of lifting joints are set on the suspended member 7;

[0038] In this implementation step, according to the actual length of the suspended member 7, a plurality of lifting joints are scientifically and reasonably set on its surface for precise positioning, facilitating the subsequent setting of lifting members, and ensuring the balanced distribution of the lifting points during the hoisting process.

[0039] Step 2: Correspondingly set the first hook assembly 2 at the lifting joints and connect it to the hoisting equipment through the first towing rope 3;

[0040] In this implementation step, the first hook assembly 2 is respectively installed at the corresponding lifting joints to ensure the stable and reliable connection between each lifting joint and the hook to bear the gravity of the suspended member 7. Compared with the traditional single-point hoisting, the multi-point hook design makes the force during hoisting more dispersed and can be applied to a longer suspended member 7, reducing the risk of structural damage caused by concentrated force.

[0041] Step 3: Start the hoisting equipment and gradually turn the suspended member 7 in the horizontal state to the vertical state;

[0042] In this implementation step, start the hoisting equipment and gradually turn the suspended member 7 from the horizontal state to the vertical state. During this process, the hoisting equipment can stably control the hoisting speed of each towing rope, synchronously monitor the hoisting dynamics, and ensure that the lifting points are on the same straight line.

[0043] Step 4: Fix the suspended component 7 in the vertical state to the pile frame 1.

[0044] In this implementation step, once the suspended component 7 is successfully rotated to the vertical state, it is fixed to the pile frame 1. After fixation, a reinforcement device such as a steel cable or a clamp is used for further locking to prevent accidental movement during construction. After the fixation is completed, a comprehensive safety inspection needs to be carried out to ensure that all connection points and fixing devices are in the best state to guarantee the safety of subsequent operations.

[0045] Through this method, multi-point lifting can effectively reduce the risk of inclination caused by unstable center of gravity, greatly improve the safety of lifting, improve the efficiency of the entire lifting operation, and is especially suitable for the construction of heavy and long pile foundations; multiple lifting joints are reasonably set on the suspended component 7 according to the actual measured length. The position selection of the lifting joints takes into account the center of gravity distribution and stress dispersion to ensure balance during the lifting process; at least three first hook assemblies 2 are set, that is, according to the actual measured length of the PHC pipe pile, for extra-long PHC pipe piles, multiple installation parts are set, and each first hook assembly 2 is correspondingly connected to two installation parts to ensure pressure dispersion and improve stability. Through the cooperation of multiple first hook assemblies 2, the stability and safety of lifting are improved, and the possibility of accidents is reduced. Each component can be adjusted according to the size and weight of different pipe piles, improving the compatibility of the device and method, thus solving the technical problem of the unstable safety risk in the erection construction process of extra-long PHC pipe piles in the related technology.

[0046] In some preferred embodiments, based on the actual measured length of the suspended component 7, multiple lifting joints are set on the suspended component 7, which includes the following steps:

[0047] Step 10: Obtain the actual measured length of the suspended component 7, calculate the number and position of the lifting joints according to the actual measured length, and make marks at the corresponding positions.

[0048] In this step, in the lifting operation, it is crucial to obtain the actual measured length of the suspended component 7 and correctly calculate the number and position of the lifting joints. Use precise measuring tools such as a steel tape measure, a distance measuring instrument or a laser distance measuring instrument to measure the length of the suspended component 7. According to the length of the suspended component 7, combined with the conventional engineering design standards, determine the weight that each lifting joint needs to bear and the principle of trying to disperse the force, determine the number and position of the lifting joints, and make precise marks on the suspended component 7 according to the position of each calculated lifting joint. By precisely measuring the length of the suspended component 7, reasonably calculating the number of lifting joints, and evenly positioning the lifting joints, a solid foundation can be provided for the subsequent multi-point lifting operation to ensure safety and efficiency.

[0049] In some preferred embodiments, the first hook assembly 2 is correspondingly connected to the lifting joint, which includes the following steps:

[0050] Step 20: Set the number of hanging parts to n. Based on the set number of hanging parts, the installation number of the first hook assembly 2 is n / 2; arrange the suspended-piece connection assemblies 23 of the first hook assembly 2 at the corresponding hanging parts; according to the actual hoisting design requirements, connect the first towing ropes 3 to the first hook assembly 2 and the second hook assembly 4 respectively.

[0051] In this step, according to the number of hanging parts calculated previously, determine the number of the first hook assemblies 2 to be installed. Align and connect the suspended-piece connection assemblies 23 of the first hook assembly 2 with the corresponding hanging parts to provide a connection basis for subsequent hoisting and rotation.

[0052] In some preferred embodiments, start the hoisting equipment to gradually turn the suspended piece 7 in the horizontal state to the vertical state, which includes the following steps:

[0053] Step 30: Start the hoisting equipment, and multiple first towing ropes 3 apply forces simultaneously to slowly lift the suspended piece 7 off the ground; the first towing rope 3 on one side pulls the suspended piece 7 to an inclined state, and the remaining first towing ropes 3 act on the lower inclined part of the suspended piece 7 to stabilize the suspended piece 7 until the suspended piece 7 turns to the vertical state.

[0054] In this step, ensure that the hoisting equipment is operating normally and that multiple first towing ropes 3 are already connected. Ensure that the suspended piece 7 is stable and there are no obstacles, and that it can maintain balance during the hoisting process. Gradually start the hoisting equipment and gradually apply force; multiple first towing ropes 3 apply forces simultaneously to slowly lift the suspended piece 7 off the ground; the first towing rope 3 on one side of the suspended piece 7 starts to apply a pulling force to gradually incline the suspended piece 7; the other first towing ropes 3 apply forces to the lower inclined part of the suspended piece 7 to provide additional support and ensure its stability in the inclined state; according to the actual inclination of the suspended piece 7, timely adjust the force application of each first towing rope 3 to maintain balance. When the suspended piece 7 is successfully turned to the vertical state, slowly reduce the force of the hoisting equipment to achieve stable suspension.

[0055] In some preferred embodiments, fix the suspended piece 7 in the vertical state to the pile frame 1, which includes the following steps:

[0056] Step 40: Connect the suspended-piece connection assembly 23 on the second towing rope 5 to the suspended piece 7, and the hoisting equipment drives the second towing rope 5 to hold the suspended piece 7 in the vertical state against the pile frame 1; slowly lower the hydraulic hammer 8 to sleevedly fix the suspended piece 7; start the holding rod device 9 to clamp and fix the suspended piece 7.

[0057] In this step, between two lifting connection parts near the top of the piece to be lifted 7, select a suitable fixing part, install the end of the second towing rope 5 and the piece to be lifted connection assembly 23 on the fixing part. After the piece to be lifted 7 is in a vertical state, the hoisting equipment drives the second towing rope 5 to apply force slowly, and presses the vertically placed piece to be lifted 7 towards the pile frame 1; operate the hydraulic hammer 8 and slowly lower it to ensure that it can effectively sleeve on the top of the piece to be lifted 7 to ensure stable fixation; start the derrick 9 to clamp and fix the piece to be lifted 7 to ensure its firmness on the pile frame 1. After the fixation is completed, conduct a comprehensive inspection on the connection between the piece to be lifted 7 and the pile frame 1 to ensure that all connection components are firm and stable. Through the above steps, the piece to be lifted 7 in a vertical state is firmly fixed to the pile frame 1. The combined use of the second towing rope 5, the hydraulic hammer 8 and the derrick 9 not only ensures the firm fixation of the piece to be lifted 7, but also improves the safety and efficiency of the overall operation.

[0058] The beneficial effects brought by the present invention include:

[0059] A multi-point lifting device and method for large-diameter super-long PHC pipe piles. Among them, a plurality of lifting connection parts are reasonably arranged on the piece to be lifted 7 according to the actually measured length. The positions of the lifting connection parts are selected considering the center-of-gravity distribution and stress dispersion to ensure balance during the lifting process; at least three first hook assemblies 2 are provided, that is, according to the actually measured length of the PHC pipe pile, for super-long PHC pipe piles, a plurality of installation parts are provided, and each first hook assembly 2 is correspondingly connected to two installation parts to ensure pressure dispersion and improve stability. Through the cooperation of a plurality of first hook assemblies 2, the stability and safety of lifting are improved, and the possibility of accidents is reduced. Each component can be adjusted according to the sizes and weights of different pipe piles, improving the compatibility of the device and method, thus solving the technical problem of the unstable safety risk existing in the erection construction process of super-long PHC pipe piles in the related art.

[0060] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0061] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0062] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A multi-point lifting device for large-diameter and ultra-long PHC piles, characterized in that: It includes: A pile frame (1) having a hoisting device on its top, wherein a plurality of first traction ropes (3) are connected to the hoisting device; At least three first hook assemblies (2), the first hook assemblies (2) comprising a first hook rope (21) and a first pulley (22) provided with a first traction rope connecting member, the first hook rope (21) being wound around the first pulley (22), and having two ends extending downwardly provided with a to-be-suspended part connecting assembly (23), each of the first traction rope connecting members being connected to one of the first traction ropes (3).

2. The multi-point lifting device for large-diameter and extra-long PHC piles according to claim 1 is characterized in that: Also includes a second hook assembly (4); The number of the first hook components (2) is three and they are divided along the length direction of the object to be hung (7), wherein the first traction rope connector of the first hook component (2) located on the left side is connected to one first traction rope (3); the two first hook components (2) located in the middle and on the right side are connected to one first traction rope (3) by connecting to the same second hook component (4); The second hook assembly (4) comprises a second hook rope (41) and a second pulley (42); the second pulley (42) is connected to the first traction rope (3) by providing a second traction rope connecting piece; the second hook rope (41) is wound around the second pulley (42); the first traction rope connecting pieces of the two first hook assemblies (2) located in the middle and on the right are respectively connected to the two ends of the second hook rope (41).

3. The multi-point lifting device for large-diameter and extra-long PHC piles according to claim 1 is characterized in that: The hoisting device is connected to a second traction rope (5); One end of the second traction rope (5) is connected to the hoisting device, and the other end is connected to the to-be-suspended component connection assembly (23) via a hook.

4. The multi-point lifting device for large-diameter and extra-long PHC piles according to claim 1 is characterized in that: The to-be-suspended component connection assembly (23) comprises a clamping ring (231) and an annular steel wire rope (232); The clamping ring (231) is fixedly arranged on the annular steel wire rope (232), and the annular steel wire rope (232) is used for being sleeved on the part to be hoisted (7).

5. The multi-point lifting device for large-diameter and extra-long PHC piles as claimed in claim 1 is characterized in that: The pile frame (1) is provided with a hydraulic hammer (8) which slides along the length direction of the pile frame, and the pile frame (1) is provided with a pile gripper (6) near the bottom thereof for fixing a part to be hoisted (7) which is hoisted to a vertical state.

6. A multi-point lifting method for large-diameter and ultra-long PHC piles, characterized in that: It includes: Based on the measured length of the part to be hung (7), a plurality of hanging parts are arranged on the part to be hung (7); The first hook assembly (2) is correspondingly arranged on the lifting portion, and connected to the hoisting device via the first traction rope (3); Starting the hoisting device to gradually turn the to-be-hoisted component (7) in a horizontal state to a vertical state; The to-be-suspended member (7) in a vertical state is fixed on the pile frame (1).

7. The multi-point lifting method for large-diameter and super-long PHC piles according to claim 6, characterized in that: Based on the measured length of the part to be hoisted (7), a plurality of hoisting parts are arranged on the part to be hoisted (7), which comprises the following steps: The measured length of the part to be hung (7) is obtained, the number and position of the hanging parts are calculated according to the measured length, and marks are made at the corresponding positions.

8. The multi-point lifting method for large-diameter and super-long PHC piles according to claim 6, characterized in that: The first hook assembly (2) is connected to the lifting part accordingly, and the hoisting device is connected via the first traction rope (3), which comprises the following steps: The number of the hanging parts is set to n, and based on the number of the hanging parts, the number of the first hook components (2) to be installed is n / 2; The to-be-suspended component connection component (23) of the first suspension hook component (2) is arranged at the corresponding suspension connection portion; According to actual lifting design requirements, the first traction rope (3) is respectively connected to the first hook assembly (2) and the second hook assembly (4).

9. The multi-point lifting method for large-diameter and super-long PHC piles according to claim 6, characterized in that: Starting the hoisting device to gradually turn the horizontal part (7) to be hoisted to a vertical state includes the following steps: The hoisting device is started, and the plurality of first traction ropes (3) simultaneously apply force to slowly lift the object to be hoisted (7) off the ground; The first traction rope (3) located on one side pulls the part to be suspended (7) to an inclined state, and the remaining first traction ropes (3) act on the inclined lower part of the part to be suspended (7) to stabilize the part to be suspended (7) until the part to be suspended (7) is turned to a vertical state.

10. The multi-point lifting method for large-diameter and super-long PHC piles according to claim 6, characterized in that: The member to be suspended (7) in a vertical state is fixed on a pile frame (1), which comprises the following steps: The to-be-suspended component connection assembly (23) on the second traction rope (5) is connected to the to-be-suspended component (7), and the hoisting device drives the second traction rope (5) to hold the to-be-suspended component (7) in a vertical state against the pile frame (1); Slowly lower the hydraulic hammer (8) to fit and fix the part to be hoisted (7); The pole holding device (9) is started to clamp and fix the object to be hoisted (7).

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