Offshore large diameter steel pipe pile erection method and pile erection device

Abstract

The invention discloses an offshore large-diameter steel pipe pile erection method and a pile erection device thereof, which comprises a pile guide, a hoisting mechanism, a pile driving frame, a straightening mechanism and a positioning mechanism. The method adopts a pile hanging auxiliary device installed on the pile driving guide to hook the bottom of the steel pipe pile, adopts an external lifting device to hook the lifting position of the steel pipe pile, the steel wire rope of the pile hanging auxiliary device slowly descends, and the steel wire rope of the external lifting device slowly rises, so as to achieve the purpose of erecting the steel pipe pile to a vertical state. The use of this process can greatly reduce the performance requirements of offshore wind power large-diameter steel pipe piles on ship machinery and equipment, and at the same time reduce the stationing of ship machinery and equipment. The pile driving platform is both a pile erection auxiliary device and a pile erection limit device, which can greatly improve the efficiency of pile erection and steel pipe pile stationing.

Description

Technical Field

[0001] The invention relates to the technical field of offshore large-diameter steel pipe pile construction, and in particular to an offshore large-diameter steel pipe pile erecting method and a pile erecting device. Background Art

[0002] During the construction of offshore wind power foundations, single pile foundations have been widely used due to their many advantages such as high bearing capacity, convenient construction, and high construction efficiency. As the installed power of offshore wind power increases, the diameter and length of single pile foundations are also increasing, and higher and higher requirements are put forward for construction ships and machinery equipment. For some offshore wind power projects, there are very few ships and machinery equipment available in China, which has also caused the situation of "offshore wind power construction needs to wait for offshore wind power construction equipment" to a certain extent, which directly caused the reduction of engineering efficiency and the increase of construction costs, which is not conducive to the development of offshore wind power.

[0003] There are currently two commonly used practices in China during the construction of offshore wind power single pile foundations. One is that the lifting equipment has sufficient capacity and has an auxiliary hook that can carry 1 / 3-1 / 2 of the pile weight. The main hook hangs the steel pipe pile lifting lug, and the auxiliary hook hangs the tail end of the steel pipe pile. The main hook slowly rises and the auxiliary hook slowly descends to achieve the steel pipe pile erection. The second is that the lifting equipment does not have an auxiliary hook that can carry 1 / 3-1 / 2 of the pile weight, and another lifting equipment that meets the requirements is required to hang the tail of the steel pipe pile and cooperate with the main lifting equipment to complete the pile erection. The above method one has high requirements for lifting equipment, and method two requires more ship machinery equipment to be stationed, which affects construction efficiency and cost. Summary of the invention

[0004] The purpose of the present invention is to provide an offshore large-diameter steel pipe piling device which does not need to consider the load-bearing capacity of the auxiliary hook of the lifting equipment and only requires a lifting ship and a barge to cooperate with a pile stabilizing platform to complete the large-diameter steel pipe piling construction.

[0005] Another object of the present invention is to provide an offshore large-diameter steel pipe piling method based on the above-mentioned offshore large-diameter steel pipe piling device.

[0006] To this end, the technical solution of the present invention is as follows:

[0007] Solution 1: An offshore large-diameter steel pipe pile device, comprising:

[0008] The pile driving guide frame is composed of a truss and four vertically arranged guide tubes; the truss is a cubic structure with an opening on one side, and its transverse cross section is "concave"; the four guide tubes are evenly arranged along the circumference of the truss and fixed on the outside of the truss;

[0009] A hoisting mechanism, comprising a horizontal plate and two sets of hoisting devices symmetrically and spaced apart on the horizontal plate; each set of hoisting devices comprises a winch and a pulley arranged in front of the winch and fixed at the edge of the horizontal plate; a winch wire rope is wound on the drum of the winch, and a line between the winch and the pulley is perpendicular to the side of the horizontal plate to which the pulley is fixed; the horizontal plate is fixed on the top surface of the frame body opposite to the opening end of the truss, and the rope ends of the winch wire ropes on the two winches are respectively passed around the pulleys located in front of the winch and naturally fall to the inner side of the opening of the truss;

[0010] A pile driving frame, which is fixed on the horizontal plate and located between the two sets of lifting devices;

[0011] The straightening mechanism comprises an upper straightening mechanism and a lower straightening mechanism which are arranged at intervals inside the opening of the truss; the upper straightening mechanism and the lower straightening mechanism have the same structure, both of which are composed of three jacking devices fixed on the truss and a crossbeam on which the jacking devices are fixed, and the crossbeam is detachably mounted on the opening end of the truss, so that the four jacking devices in the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices are located on the central axis of the opening of the truss;

[0012] And a positioning mechanism, which comprises four positioning piles; the outer diameters of the positioning piles are adapted to the inner diameters of the four guide pipes on the pile driving guide frame.

[0013] Solution 2: An offshore large-diameter steel pipe pile device, comprising:

[0014] The pile driving guide frame is composed of a truss and four vertically arranged guide tubes; the truss is a cubic structure with an opening on one side, and its transverse cross section is "concave"; the four guide tubes are evenly arranged along the circumference of the truss and fixed on the outside of the truss;

[0015] A hoisting mechanism, comprising a horizontal plate and two sets of hoisting devices symmetrically and spaced apart on the horizontal plate; each set of hoisting devices comprises a winch and a pulley arranged in front of the winch and fixed at the edge of the horizontal plate; a winch wire rope is wound on the drum of the winch, and a line between the winch and the pulley is perpendicular to the side of the horizontal plate to which the pulley is fixed; the horizontal plate is fixed on the top surface of the frame body opposite to the opening end of the truss, and the rope ends of the winch wire ropes on the two winches are respectively passed around the pulleys located in front of the winch and naturally fall to the inner side of the opening of the truss;

[0016] A pile driving frame, which is fixed on the horizontal plate and located between the two sets of lifting devices;

[0017] The straightening mechanism includes a pile gripper, which is fixed on the side wall of the pile frame adjacent to the truss opening, and includes at least two coaxially arranged annular arms, and each annular arm is evenly provided with a plurality of jacking devices along the circumferential direction; the central axis of the annular arms coincides with the central axis of the truss opening;

[0018] And a positioning mechanism, which comprises four positioning piles; the outer diameters of the positioning piles are adapted to the inner diameters of the four guide pipes on the pile driving guide frame.

[0019] Furthermore, in the design schemes of the above two offshore large-diameter steel pipe pile erecting devices, the spacing distance between the two sets of lifting devices is adapted to the diameter of the steel pipe pile, so that the spacing distance between the two winch wire ropes thereon is the same as the spacing distance between the two lifting ears symmetrically arranged on the opposite sides of the steel pipe pile.

[0020] Solution 3: An offshore large-diameter steel pipe pile device, comprising:

[0021] The pile driving guide frame is composed of a truss and four vertically arranged guide tubes; the truss is a cubic structure with an opening on one side, so that its transverse cross section is "concave"; the four guide tubes are evenly arranged along the circumference of the truss and fixed on the outside of the truss;

[0022] The lifting mechanism comprises two horizontal plates and two sets of lifting devices; each set of lifting devices comprises a winch fixed on the horizontal plate, a pulley arranged at the front side of the winch and fixed at the edge of the horizontal plate, and a wire rope ring arranged below the pulley and fixed on the horizontal plate; a winch wire rope is wound on the drum of the winch, and the connection line between the winch and the pulley is perpendicular to the side of the horizontal plate to which the pulley is fixed; the two horizontal plates are respectively fixed on the top surface of the frame on both sides of the open end of the truss, so that the two sets of lifting devices are symmetrically arranged, and the rope ends of the winch wire ropes on the two winches respectively pass around the pulley located in front of them in turn and pass through the wire rope rings and then naturally hang down to the outside of the frame on one side of the open end of the truss; wherein, a wire rope ring is added to the horizontal plate at the bottom end of the pulley, which may prevent the winch wire rope that passes around the pulley from being pulled onto the steel pile lifting ear and pulling the wire rope off the pulley.

[0023] a pile-driving frame fixed to the top surface of the frame body on the opposite side of the open end of the truss;

[0024] The straightening mechanism comprises an upper straightening mechanism and a lower straightening mechanism which are arranged at intervals inside the opening of the truss; the upper straightening mechanism and the lower straightening mechanism have the same structure, both of which are composed of three jacking devices fixed on the truss and a crossbeam on which the jacking devices are fixed, and the crossbeam is detachably mounted on the opening end of the truss, so that the four jacking devices of the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices are located on the central axis of the opening of the truss;

[0025] And a positioning mechanism, which comprises four positioning piles; the outer diameters of the positioning piles are adapted to the inner diameters of the four guide pipes on the pile driving guide frame.

[0026] A pile erection method based on the three offshore large-diameter steel pipe pile erection devices of the above-mentioned schemes 1, 2 and 3, the steps are as follows:

[0027] S1, dragging the pile stabilizing platform formed by assembling the pile driving guide frame and the positioning mechanism to the construction site, and after leveling, stably fixing it at the construction site through the positioning mechanism; at this time, the central axis of the opening of the truss of the pile driving guide frame coincides with the central axis of the preset steel pipe pile to be erected;

[0028] S2, the crane ship and the barge are stationed; wherein, the barge is horizontally loaded with steel pipe piles, and the bottom of the steel pipe piles extends to a certain distance outside the barge, so that after the barge is stationed, the bottom of the steel pipe piles extending to the outside of the barge extends into the inside of the opening of the truss, and the two winch wire ropes located above the steel pipe piles and the two first lifting ears symmetrically arranged on the opposite side walls of the bottom of the steel pipe piles are located in the same vertical plane; the crane ship is stationed on the adjacent side of the barge;

[0029] S3, connect the rope ends of the two winch wire ropes to the first lifting lugs located below them respectively; connect the rope ends of the two parallel beam wire ropes on the hanging beam to the two second lifting lugs symmetrically arranged on the opposite side walls of the upper part of the steel pipe pile respectively, and use the hook on the crane to lift the hanging beam

[0030] S4, the hook of the crane is gradually lifted up to gradually separate the steel pipe pile from the barge, and at the same time, the winch wire rope is gradually lowered in coordination with the hook of the crane to gradually adjust the steel pipe pile from a horizontal state to an inclined state;

[0031] When the steel pipe pile is gradually lifted to an angle of 60° to 75° with the horizontal plane, or the horizontal distance from the side of the horizontal plate with the pulley fixed to the steel pipe pile is 3 to 10m, the hook of the crane stops lifting and continues to gradually lower the winch wire rope until the steel pipe pile is adjusted to a vertical state; this step can ensure that a safe distance is always left between the steel pipe pile and the pile guide frame, avoiding the large force generated by the contact between the heavy steel pipe pile and the pile guide frame, which may damage the pile guide frame or even the mechanical equipment.

[0032] S5, releasing the connection between the two winch wire ropes and the two first lifting ears, and using the hook of the crane to lift the steel pipe pile to the pile sinking position through the lifting beam;

[0033] S6. Install the pile driver and straightening mechanism on the truss. After the straightening mechanism adjusts the verticality of the steel pipe pile to meet the construction requirements, the steel pipe pile is sunk into the mud to a balanced state, and the pile driver is hoisted by the pile driver to sink the steel pipe pile to the designed elevation.

[0034] S7, dismantle the hoisting mechanism, the pile driving frame and the straightening mechanism, release the positioning mechanism, move the pile stabilizing platform to the next pile construction position, repeat the above steps S1 to S6, and complete the construction of the next steel pipe pile.

[0035] Solution 4: An offshore large-diameter steel pipe pile device, comprising:

[0036] The pile driving guide frame is composed of a truss and four vertically arranged guide tubes; the truss is a cubic structure with an opening on one side, so that its transverse cross section is "concave"; the four guide tubes are evenly arranged along the circumference of the truss and fixed on the outside of the truss;

[0037] A hoisting mechanism, comprising two horizontal plates and two sets of hoisting devices; each set of hoisting devices comprises a winch fixed on the horizontal plate, and a pulley arranged at the front side of the winch and fixed at the edge of the horizontal plate; a winch wire rope is wound on the drum of the winch, and the line between the winch and the pulley is perpendicular to the side of the horizontal plate to which the pulley is fixed; the two horizontal plates are respectively fixed on the top surface of the frame body located on both sides of the opening end of the truss, and the two sets of hoisting devices are symmetrically and relatively arranged, so that the two winches and two pulleys of the two sets of hoisting devices are located on the same straight line; the rope ends of the winch wire ropes on the two winches are respectively passed around the pulleys located at the front side thereof and naturally hang down inside the opening of the truss;

[0038] a pile-driving frame fixed to the top surface of the frame body on the opposite side of the open end of the truss;

[0039] A straightening mechanism, comprising an upper straightening mechanism and a lower straightening mechanism which are arranged at intervals inside the opening of the truss; the upper straightening mechanism and the lower straightening mechanism have the same structure, both consisting of three jacking devices fixed on the truss and a crossbeam on which the jacking devices are fixed, the crossbeam being detachably mounted on the opening end of the truss, so that the four jacking devices of the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices are located on the central axis of the opening of the truss, and are located on the midpoint of the line connecting the two winches and the two pulleys of the two sets of hoisting devices;

[0040] And a positioning mechanism, which comprises four positioning piles; the outer diameters of the positioning piles are adapted to the inner diameters of the four guide pipes on the pile driving guide frame.

[0041] Furthermore, in the above-mentioned four design schemes of offshore large-diameter steel pipe piling devices, namely, Scheme 1, Scheme 2, Scheme 3 and Scheme 4, in addition to being composed of four positioning piles, the positioning mechanism can also adopt a scheme in which four suction cylinders are also arranged at the bottom ends of the four positioning piles; wherein the bottom end of each positioning pile is fixed at the center of the top surface of the suction cylinder below it.

[0042] Furthermore, in the scheme in which the positioning mechanism is composed of four positioning piles and four suction cylinders, a fixed truss is also arranged below the truss, and its four top corners are respectively fixed on the side walls of the bottom ends of the four positioning piles, so that the four suction cylinders are simultaneously supported at the four top corners of the fixed truss; the fixed truss is a cubic structure with an opening on one side, and its opening is located on the same side as the opening of the truss, and the sizes of the two openings are the same.

[0043] A method for piling a large diameter steel pipe at sea based on the fourth solution is implemented by the piling device, and the steps are as follows:

[0044] S1, dragging the pile stabilizing platform formed by assembling the pile driving guide frame and the positioning mechanism to the construction site, and after leveling, stably fixing it at the construction site through the positioning mechanism; at this time, the central axis of the opening of the truss of the pile driving guide frame coincides with the central axis of the preset steel pipe pile to be erected;

[0045] S2, the crane ship and the barge are stationed; wherein, the barge is horizontally loaded with steel pipe piles, and the bottom of the steel pipe piles extends to a certain distance outside the barge, so that after the barge is stationed, the bottom of the steel pipe piles extending to the outside of the barge extends into the inside of the opening of the truss, and the two winch wire ropes located above the steel pipe piles and the two first lifting ears symmetrically arranged on the opposite side walls of the bottom of the steel pipe piles are located in the same vertical plane; the crane ship is stationed on the adjacent side of the barge;

[0046] S3, connect the rope ends of the two winch wire ropes to the first lifting lugs located below them respectively; connect the rope ends of the two parallel beam wire ropes on the hanging beam to the two second lifting lugs symmetrically arranged on the opposite side walls of the upper part of the steel pipe pile respectively, and use the hook on the crane to lift the hanging beam

[0047] S4, the hook of the crane is gradually lifted up to gradually separate the steel pipe pile from the barge, and at the same time, the winch wire rope is gradually lowered in coordination with the hook of the crane to gradually adjust the steel pipe pile from a horizontal state to a vertical state;

[0048] S5, releasing the connection between the two winch wire ropes and the two first lifting ears, at which time the steel pipe pile is just at the pile sinking position;

[0049] S6. Install the pile driver and straightening mechanism on the truss. After the straightening mechanism adjusts the verticality of the steel pipe pile to meet the construction requirements, the steel pipe pile is sunk into the mud to a balanced state, and the pile driver is hoisted by the pile driver to sink the steel pipe pile to the designed elevation.

[0050] S7, dismantle the hoisting mechanism, the pile driving frame and the straightening mechanism, release the positioning mechanism, move the pile stabilizing platform to the next pile construction position, repeat the above steps S1 to S6, and complete the construction of the next steel pipe pile.

[0051] Compared with the prior art, the offshore large-diameter steel pipe pile erecting device of the present application provides four device technical solutions, which have a simple structure and a reasonable design. During the implementation of the offshore large-diameter steel pipe pile erecting method implemented based on the device, only one crane ship and one barge are needed to cooperate with the offshore large-diameter steel pipe pile erecting device to complete the construction, and only the main hook of the lifting equipment is used, and there is no requirement for the presence or absence of an auxiliary hook and the carrying capacity of the auxiliary hook, which greatly reduces the performance requirements of the offshore wind power large-diameter steel pipe piles on the ship machinery and equipment while reducing the stationing of the ship machinery and equipment; in addition, the offshore large-diameter steel pipe pile erecting device combines the functions of a pile driving platform, a pile erection auxiliary function, and a pile erection limiting function, which greatly improves the efficiency of pile erection and steel pipe pile stationing; among them, the technical solution of the above-mentioned fourth offshore large-diameter steel pipe pile erecting device realizes the simultaneous completion of steel pipe pile erection and steel pipe pile stationing during the pile erection construction process through the reasonable setting of the lifting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a structural schematic diagram of a steel pipe pile and a pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention is carried out to step S2;

[0053] Figure 2 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention is carried out to step S4;

[0054] Figure 3 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention proceeds to step S4 and the oblique inclination angle of the steel pipe pile is 60°;

[0055] Figure 4 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention proceeds to step S4 and the oblique inclination angle of the steel pipe pile is 75°;

[0056] Figure 5 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention proceeds to step S4 and the steel pipe pile is adjusted to a vertical state;

[0057] Figure 6 It is a structural schematic diagram of the steel pipe pile being hoisted to the pile sinking position when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention proceeds to step S5;

[0058] Figure 7 It is a top view of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention is carried out to step S2;

[0059] Figure 8It is a side view of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention is carried out to step S2;

[0060] Fig. 9 A top view of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 1 of the present invention is carried out to step S6;

[0061] Fig.10 This is a schematic diagram of the structure in which a hoisting mechanism according to Embodiment 1 of the present invention is arranged on a truss;

[0062] Fig.11 It is a structural schematic diagram of a steel pipe pile and a pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 2 of the present invention is carried out to step S2;

[0063] Fig.12 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 2 of the present invention proceeds to step S4 and the oblique inclination angle of the steel pipe pile is 60°;

[0064] Fig.13 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 2 of the present invention proceeds to step S4 and the steel pipe pile is adjusted to a vertical state;

[0065] Fig.14 It is a structural schematic diagram of the steel pipe pile being hoisted to the pile sinking position when the offshore large-diameter steel pipe pile construction method in Example 2 of the present invention proceeds to step S5;

[0066] Fig.15 It is a structural schematic diagram of a steel pipe pile and a pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 3 of the present invention proceeds to step S2;

[0067] Fig.16 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 3 of the present invention proceeds to step S4 and the oblique inclination angle of the steel pipe pile is 30°;

[0068] Fig.17 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 3 of the present invention proceeds to step S4 and the oblique inclination angle of the steel pipe pile is 60°;

[0069] Fig.18 It is a structural schematic diagram of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 3 of the present invention proceeds to step S4 and the steel pipe pile is adjusted to a vertical state;

[0070] Fig.19It is a structural schematic diagram of the steel pipe pile being hoisted to the pile sinking position when the offshore large-diameter steel pipe pile construction method in Example 3 of the present invention proceeds to step S5;

[0071] Fig. 20 This is a schematic diagram of the structure in which a hoisting mechanism according to Embodiment 3 of the present invention is arranged on a truss;

[0072] Fig.21 A top view of a steel pipe pile and a pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 3 of the present invention is carried out to step S2;

[0073] Fig. 22 It is a side view of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 3 of the present invention is carried out to step S2;

[0074] Fig.23 A top view of the steel pipe pile and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 3 of the present invention is carried out to step S6;

[0075] Fig.24 It is a top view of the steel pipe piles and the pile stabilizing platform when the offshore large-diameter steel pipe pile construction method in Example 4 of the present invention proceeds to step S2. DETAILED DESCRIPTION

[0076] 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.

[0077] Example 1

[0078] like Figures 1 to 10 As shown, the offshore large-diameter steel pipe piling device includes a piling guide frame, a hoisting mechanism, a piling frame, a straightening mechanism, and a positioning mechanism, wherein:

[0079] The pile driving guide frame is composed of a truss 1 and four vertically arranged guide tubes 2; the truss 1 is a cubic structure with an opening on one side, and its transverse cross section is "concave"; the four guide tubes 2 are evenly arranged along the circumference of the truss 1 and fixed on the outside of the truss 1;

[0080] The hoisting mechanism includes a horizontal plate 5 and two sets of hoisting devices symmetrically and spaced apart on the horizontal plate 5; each set of hoisting devices includes a winch 6 and a pulley 7 arranged in front of the winch 6 and fixed at the edge of the horizontal plate 5; a winch wire rope 9 is wound on the drum of the winch 6, and the line between the winch 6 and the pulley 7 is perpendicular to the side of the horizontal plate 5 to which the pulley 7 is fixed; the horizontal plate 5 is fixed on the top surface of the frame body located on the opposite side of the opening end of the truss 1, and the rope ends of the winch wire ropes 9 on the two winches 6 are respectively passed around the pulley 7 located in front of it and naturally fall to the inner side of the opening of the truss 1;

[0081] The pile driving frame is fixed on the horizontal plate 5 and is located between the two sets of lifting devices;

[0082] The straightening mechanism includes an upper straightening mechanism and a lower straightening mechanism which are arranged at intervals inside the opening of the truss 1; the upper straightening mechanism and the lower straightening mechanism have the same structure, and are both composed of three jacking devices 8 fixed on the truss 1 and a crossbeam on which the jacking devices 8 are fixed, and the crossbeam is detachably mounted on the opening end of the truss 1, so that the four jacking devices 8 in the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices 8 are located on the central axis of the opening of the truss 1;

[0083] The positioning mechanism comprises four positioning piles 4; the outer diameter of the positioning piles 4 is adapted to the inner diameter of the four guide tubes 2 on the pile driving guide frame.

[0084] The specific construction steps of the offshore large-diameter steel pipe pile erection method implemented by the offshore large-diameter steel pipe pile erection device of this embodiment 1 are as follows:

[0085] S1, put the pile stabilizing platform formed by the pile driving guide frame and the positioning mechanism into the water through a slideway or land lifting equipment, and use a tugboat to tow the pile stabilizing platform to the construction site; after leveling, it is stably fixed at the construction position through the positioning mechanism; then lift the pile driving guide frame 1, and place the bottom platform 2 of the pile driving guide frame on the seabed mud surface for leveling, and use four positioning piles 4 respectively inserted in the guide pipe 2 to fix the pile driving guide frame 1 at the construction position; at this time, the central axis of the opening part of the truss 1 of the pile driving guide frame coincides with the central axis of the preset steel pipe pile 11 to be piled;

[0086] S2, crane vessel 20 and barge 18 are stationed; among them, Figure 1 , Figure 7 and Figure 8 As shown, the barge 18 is provided with a plurality of spacers 17 with arc-shaped through grooves on the top at intervals, so that the steel pipe piles 11 are horizontally arranged on the barge 18, and the bottom of the steel pipe piles 11 extends to a distance outside the barge 18, so that after the barge 18 is parked, the bottom of the steel pipe piles 11 extending to the outside of the barge 18 extends into the inside of the opening of the truss 1, and the two winch wire ropes 9 located above them and the two first lifting ears 12 symmetrically arranged on the opposite side walls of the bottom of the steel pipe piles 11 are located in the same vertical plane; the crane ship 20 is parked on the adjacent side of the barge 18;

[0087] S3, such as Figure 1 As shown, the rope ends of the two winch wire ropes 9 are respectively connected to the first lifting lugs 12 located below them; the rope ends of the two parallel beam wire ropes 14 on the hanging beam 15 are respectively connected to the two second lifting lugs 13 symmetrically arranged on the upper opposite side walls of the steel pipe pile 11, and the hanging beam 15 is lifted by the hook 16 on the crane ship 20.

[0088] S4, such as Figure 2 As shown, the hook head 16 of the crane 20 is gradually lifted up, so that the steel pipe pile 11 is gradually separated from the barge 18, and at the same time, the winch wire rope 9 is gradually lowered in coordination with the hook head 16 of the crane 20, so that the steel pipe pile 11 is gradually adjusted from a horizontal state to an inclined state; Figure 3 to Figure 5 As shown, when the steel pipe pile 11 is gradually lifted to an angle of 60° between it and the horizontal plane, or the horizontal distance from the side of the horizontal plate 5 with the pulley 7 fixed to the steel pipe pile 11 is 10m, the hook head of the crane 20 stops lifting, and the winch wire rope 9 continues to be gradually lowered until the steel pipe pile 11 is adjusted to a vertical state;

[0089] S5, such as Figure 6 As shown, the connection between the two hoist wire ropes 9 and the two first lifting ears 12 is released, and the steel pipe pile 11 is lifted to the pile sinking position by using the hook 16 of the crane 20 through the lifting beam 15;

[0090] S6, such as Fig. 9 As shown, a pile driver is installed on the horizontal plate 5 of the truss 1, and three jacking devices 8 in the upper straightening mechanism and the lower straightening mechanism are installed at intervals on the upper and lower inner sides of the opening of the truss 1, and then the crossbeam provided with the jacking devices 8 is welded to the opening end of the truss 1, so that the four jacking devices 8 in the same straightening mechanism are evenly arranged along the circumferential direction, and the center points of the four jacking devices 8 are located on the central axis of the opening of the truss 1; after the verticality of the steel pipe pile 11 is adjusted to meet the construction requirements by the straightening mechanism, the steel pipe pile is self-sunk into the mud to a balanced state, and then the pile driver is hoisted by the pile driver to sink the steel pipe pile to the designed elevation position;

[0091] S7, dismantle the hoisting mechanism, the pile driving frame and the straightening mechanism, release the positioning mechanism, move the pile stabilizing platform to the next pile construction position, repeat the above steps S1 to S6, and complete the construction of the next steel pipe pile.

[0092] Example 2

[0093] like Figures 11 to 14 As shown, the offshore large-diameter steel pipe piling device includes a piling guide frame, a hoisting mechanism, a piling frame, a straightening mechanism, and a positioning mechanism, wherein:

[0094] The pile driving guide frame is composed of a truss 1 and four vertically arranged guide tubes 2; the truss 1 is a cubic structure with an opening on one side, and its transverse cross section is "concave"; the four guide tubes 2 are evenly arranged along the circumference of the truss 1 and fixed on the outside of the truss 1;

[0095] The hoisting mechanism includes a horizontal plate 5 and two sets of hoisting devices symmetrically and spaced apart on the horizontal plate 5; each set of hoisting devices includes a winch 6 and a pulley 7 arranged in front of the winch 6 and fixed at the edge of the horizontal plate 5; a winch wire rope 9 is wound on the drum of the winch 6, and the line between the winch 6 and the pulley 7 is perpendicular to the side of the horizontal plate 5 to which the pulley 7 is fixed; the horizontal plate 5 is fixed on the top surface of the frame body located on the opposite side of the opening end of the truss 1, and the rope ends of the winch wire ropes 9 on the two winches 6 are respectively passed around the pulley 7 located in front of it and naturally fall to the inner side of the opening of the truss 1;

[0096] The pile driving frame is fixed on the horizontal plate 5 and is located between the two sets of lifting devices;

[0097] The straightening mechanism includes a pile gripper 24; the pile gripper 24 is fixed on the side wall of the pile frame adjacent to the opening of the truss 1, and includes at least two coaxially arranged annular arms, and a plurality of jacking devices are evenly arranged on each annular arm along the circumferential direction; the central axis of the annular arm coincides with the central axis of the opening of the truss 1;

[0098] The positioning mechanism includes four positioning piles 4 and four suction cylinders 23 respectively arranged at the bottom ends of the four positioning piles 4; the four suction cylinders 23 respectively arranged at the bottom ends of the four positioning piles 4, the outer diameter of the positioning piles 4 is adapted to the inner diameter of the four guide tubes 2 on the pile driving guide frame.

[0099] The specific construction process of the offshore large-diameter steel pipe pile erection method implemented by the offshore large-diameter steel pipe pile erection device of this embodiment 2 is as follows:

[0100] S1. Put the pile stabilizing platform formed by the pile driving guide frame and the positioning mechanism into the water through a slideway or land lifting equipment, and use a tugboat to tow the floating pile stabilizing platform to the construction site; after leveling, it is stably fixed at the construction site through the positioning mechanism; then lift the pile driving guide frame 1, and place the bottom platform 2 of the pile driving guide frame on the seabed mud surface for leveling, and extract the gas in each suction cylinder 23 at the same speed at the same time into the suction cylinder 23, so that the four suction cylinders 23 sink to the preset position synchronously under the action of negative pressure and are in a stable state; at this time, the central axis of the opening part of the truss 1 of the pile driving guide coincides with the central axis of the preset steel pipe pile 11 to be piled;

[0101] S2, crane vessel 20 and barge 18 are stationed; among them, Fig.11As shown, the barge 18 is provided with a plurality of spacers 17 with arc-shaped through grooves on the top at intervals, so that the steel pipe piles 11 are horizontally arranged on the barge 18, and the bottom of the steel pipe piles 11 extends to a distance outside the barge 18, so that after the barge 18 is parked, the bottom of the steel pipe piles 11 extending to the outside of the barge 18 extends into the inside of the opening of the truss 1, and the two winch wire ropes 9 located above them and the two first lifting ears 12 symmetrically arranged on the opposite side walls of the bottom of the steel pipe piles 11 are located in the same vertical plane; the crane ship 20 is parked on the adjacent side of the barge 18;

[0102] S3, such as Fig.11 As shown, the rope ends of the two winch wire ropes 9 are respectively connected to the first lifting lugs 12 located below them; the rope ends of the two parallel beam wire ropes 14 on the hanging beam 15 are respectively connected to the two second lifting lugs 13 symmetrically arranged on the upper opposite side walls of the steel pipe pile 11, and the hanging beam 15 is lifted by the hook 16 on the crane ship 20.

[0103] S4, such as Fig.12 As shown, the hook head 16 of the crane 20 is gradually lifted up, so that the steel pipe pile 11 is gradually separated from the barge 18, and at the same time, the winch wire rope 9 is gradually lowered in coordination with the hook head 16 of the crane 20, so that the steel pipe pile 11 is gradually adjusted from a horizontal state to an inclined state; Fig.13 As shown, when the steel pipe pile 11 is gradually lifted to an angle of 60° between it and the horizontal plane, or the horizontal distance from the side of the horizontal plate 5 with the pulley 7 fixed to the steel pipe pile 11 is 10m, the hook head of the crane 20 stops lifting, and the winch wire rope 9 continues to be gradually lowered until the steel pipe pile 11 is adjusted to a vertical state;

[0104] S5, such as Fig.14 As shown, the connection between the two hoist wire ropes 9 and the two first lifting ears 12 is released, and the steel pipe pile 11 is lifted to the pile sinking position by using the hook 16 of the crane 20 through the lifting beam 15;

[0105] S6. Install a pile frame 24 on the horizontal plate 5 of the truss 1, and install a pile gripper 22 on the pile frame 24. Then use the four jacking devices on the pile gripper 22 to adjust the verticality of the steel pipe pile 11. After the verticality of the steel pipe pile meets the requirements, the steel pipe pile 11 sinks into the mud to a balanced state, and the pile hammer is lifted to sink the steel pipe pile 11 to the designed elevation.

[0106] S7, inflate the suction cylinder 23, the pile driving guide frame 1 floats up under the action of buoyancy, release the positioning mechanism, move the pile stabilizing platform to the next pile construction position, repeat the above steps S1 to S6, and complete the construction of the next steel pipe pile.

[0107] Example 3

[0108] like Figure 15 to Figure 23As shown, the offshore large-diameter steel pipe piling device includes a piling guide frame, a hoisting mechanism, a piling frame, a straightening mechanism, and a positioning mechanism, wherein:

[0109] The pile driving guide frame is composed of a truss 1 and four vertically arranged guide tubes 2; the truss 1 is a cubic structure with an opening on one side, so that its transverse cross section is "concave"; the four guide tubes 2 are evenly arranged along the circumference of the truss 1 and fixed on the outside of the truss 1;

[0110] The hoisting mechanism includes two horizontal plates 5 and two groups of hoisting devices; each group of hoisting devices includes a winch 6 fixed on the horizontal plate 5, a pulley 7 arranged at the front side of the winch 6 and fixed at the edge of the horizontal plate 5, and a wire rope ring 10 arranged below the pulley 7 and fixed on the horizontal plate 5; a winch wire rope 9 is wound on the drum of the winch 6, and the connection line between the winch 6 and the pulley 7 is perpendicular to the side of the horizontal plate 5 to which the pulley 7 is fixed; the two horizontal plates 5 are respectively fixed on the top surface of the frame body on both sides of the open end of the truss 1, so that the two groups of hoisting devices are symmetrically arranged, and the rope ends of the winch wire ropes 9 on the two winches 6 respectively pass through the pulley 7 located in front of them in turn and pass through the wire rope ring 10 and then naturally hang down to the outside of the frame body on one side of the open end of the truss 1;

[0111] The piling frame is fixed on the top surface of the frame body located on the opposite side of the open end of the truss 1;

[0112] The straightening mechanism includes an upper straightening mechanism and a lower straightening mechanism which are arranged at intervals inside the opening of the truss 1; the upper straightening mechanism and the lower straightening mechanism have the same structure, both of which are composed of three jacking devices 8 fixed on the truss 1 and a crossbeam on which the jacking devices 8 are fixed, and the crossbeam is detachably mounted on the opening end of the truss 1, so that the four jacking devices 8 of the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices 8 are located on the central axis of the opening of the truss 1;

[0113] The positioning mechanism comprises four positioning piles 4; the outer diameter of the positioning piles 4 is adapted to the inner diameter of the four guide tubes 2 on the pile driving guide frame.

[0114] The specific construction process of the offshore large-diameter steel pipe pile erection method implemented by the offshore large-diameter steel pipe pile erection device of this embodiment 3 is as follows:

[0115] S1, put the pile stabilizing platform formed by the pile driving guide frame and the positioning mechanism into the water through a slideway or land lifting equipment, and use a tugboat to tow the pile stabilizing platform to the construction site; after leveling, it is stably fixed at the construction position through the positioning mechanism; then lift the pile driving guide frame 1, and place the bottom platform 2 of the pile driving guide frame on the seabed mud surface for leveling, and use four positioning piles 4 respectively inserted in the guide pipe 2 to fix the pile driving guide frame 1 at the construction position; at this time, the central axis of the opening part of the truss 1 of the pile driving guide frame coincides with the central axis of the preset steel pipe pile 11 to be piled;

[0116] S2, crane vessel 20 and barge 18 are stationed; among them, Fig.15 , Fig.21 and Fig. 22 As shown, the barge 18 is provided with a plurality of spacers 17 with arc-shaped through grooves on the top at intervals, so that the steel pipe piles 11 are horizontally arranged on the barge 18, and the bottom of the steel pipe piles 11 extends to a distance outside the barge 18, so that after the barge 18 is parked, the bottom of the steel pipe piles 11 extending to the outside of the barge 18 extends into the inside of the opening of the truss 1, and the two winch wire ropes 9 located above them and the two first lifting ears 12 symmetrically arranged on the opposite side walls of the bottom of the steel pipe piles 11 are located in the same vertical plane; the crane ship 20 is parked on the adjacent side of the barge 18;

[0117] S3, such as Fig.15 As shown, the rope ends of the two winch wire ropes 9 are respectively connected to the first lifting lugs 12 located below them; the rope ends of the two parallel beam wire ropes 14 on the hanging beam 15 are respectively connected to the two second lifting lugs 13 symmetrically arranged on the upper opposite side walls of the steel pipe pile 11, and the hanging beam 15 is lifted by the hook 16 on the crane ship 20.

[0118] S4, such as Fig.16 As shown, the hook head 16 of the crane 20 is gradually lifted up, so that the steel pipe pile 11 is gradually separated from the barge 18, and at the same time, the winch wire rope 9 is gradually lowered in coordination with the hook head 16 of the crane 20, so that the steel pipe pile 11 is gradually adjusted from a horizontal state to an inclined state; Figure 17-18 As shown, when the steel pipe pile 11 is gradually lifted to an angle of 60° between it and the horizontal plane, or the horizontal distance from the side of the horizontal plate 5 with the pulley 7 fixed to the steel pipe pile 11 is 10m, the hook head of the crane 20 stops lifting, and the winch wire rope 9 continues to be gradually lowered until the steel pipe pile 11 is adjusted to a vertical state;

[0119] S5, such as Fig.19 As shown, the connection between the two hoist wire ropes 9 and the two first lifting ears 12 is released, and the steel pipe pile 11 is lifted to the pile sinking position by using the hook 16 of the crane 20 through the lifting beam 15;

[0120] S6, such as Fig.23As shown, a pile driver is installed on the horizontal plate 5 of the truss 1, and three jacking devices 8 in the upper straightening mechanism and the lower straightening mechanism are installed at intervals on the upper and lower inner sides of the opening of the truss 1, and then the crossbeam provided with the jacking devices 8 is welded to the opening end of the truss 1, so that the four jacking devices 8 in the same straightening mechanism are evenly arranged along the circumferential direction, and the center points of the four jacking devices 8 are located on the central axis of the opening of the truss 1; after the verticality of the steel pipe pile 11 is adjusted to meet the construction requirements by the straightening mechanism, the steel pipe pile is self-sunk into the mud to a balanced state, and then the pile driver is hoisted by the pile driver to sink the steel pipe pile to the designed elevation position;

[0121] S7, dismantle the hoisting mechanism, the pile driving frame and the straightening mechanism, release the positioning mechanism, move the pile stabilizing platform to the next pile construction position, repeat the above steps S1 to S6, and complete the construction of the next steel pipe pile.

[0122] Example 4

[0123] like Fig.24 As shown, the offshore large-diameter steel pipe piling device includes a piling guide, a hoisting mechanism, a piling frame, a straightening mechanism, and a positioning mechanism, wherein:

[0124] The pile driving guide frame is composed of a truss 1 and four vertically arranged guide tubes 2; the truss 1 is a cubic structure with an opening on one side, so that its transverse cross section is "concave"; the four guide tubes 2 are evenly arranged along the circumference of the truss 1 and fixed on the outside of the truss 1;

[0125] The hoisting mechanism includes two horizontal plates 5 and two groups of hoisting devices; each group of hoisting devices includes a winch 6 fixed on the horizontal plate 5, and a pulley 7 arranged on the front side of the winch 6 and fixed at the edge of the horizontal plate 5; a winch wire rope 9 is wound on the drum of the winch 6, and the connection line between the winch 6 and the pulley 7 is perpendicular to the side of the horizontal plate 5 to which the pulley 7 is fixed; the two horizontal plates 5 are respectively fixed on the top surface of the frame body located on both sides of the opening end of the truss 1, and the two groups of hoisting devices are symmetrically and relatively arranged, so that the two winches 6 and the two pulleys 7 of the two groups of hoisting devices are located on the same straight line; the rope ends of the winch wire ropes 9 on the two winches 6 are respectively passed around the pulley 7 located on the front side thereof and naturally hang down on the inner side of the opening of the truss 1;

[0126] The piling frame is fixed on the top surface of the frame body located on the opposite side of the open end of the truss 1;

[0127] The straightening mechanism includes an upper straightening mechanism and a lower straightening mechanism which are arranged at intervals inside the opening of the truss 1; the upper straightening mechanism and the lower straightening mechanism have the same structure, both of which are composed of three jacking devices 8 fixed on the truss 1 and a crossbeam on which the jacking devices 8 are fixed, and the crossbeam can be detachably erected on the opening end of the truss 1, so that the four jacking devices 8 of the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices 8 are located on the central axis of the opening of the truss 1, and are located at the midpoint of the line connecting the two winches 6 and the two pulleys 7 of the two sets of hoisting devices;

[0128] The positioning mechanism comprises four positioning piles 4; the outer diameter of the positioning piles 4 is adapted to the inner diameter of the four guide tubes 2 on the pile driving guide frame.

[0129] The specific construction process of the offshore large-diameter steel pipe pile erection method implemented by the offshore large-diameter steel pipe pile erection device of this embodiment 4 is as follows:

[0130] S1, put the pile stabilizing platform formed by the pile driving guide frame and the positioning mechanism into the water through a slideway or land lifting equipment, and use a tugboat to tow the pile stabilizing platform to the construction site; after leveling, it is stably fixed at the construction position through the positioning mechanism; then lift the pile driving guide frame 1, and place the bottom platform 2 of the pile driving guide frame on the seabed mud surface for leveling, and use four positioning piles 4 respectively inserted in the guide pipe 2 to fix the pile driving guide frame 1 at the construction position; at this time, the central axis of the opening part of the truss 1 of the pile driving guide frame coincides with the central axis of the preset steel pipe pile 11 to be piled;

[0131] S2, crane vessel 20 and barge 18 are stationed; among them, Fig.24 As shown, the barge 18 is provided with a plurality of spacers 17 with arc-shaped through grooves on the top at intervals, so that the steel pipe piles 11 are horizontally arranged on the barge 18, and the bottom of the steel pipe piles 11 extends to a distance outside the barge 18, so that after the barge 18 is parked, the bottom of the steel pipe piles 11 extending to the outside of the barge 18 extends into the inside of the opening of the truss 1, and the two winch wire ropes 9 located above them and the two first lifting ears 12 symmetrically arranged on the opposite side walls of the bottom of the steel pipe piles 11 are located in the same vertical plane; the crane ship 20 is parked on the adjacent side of the barge 18;

[0132] S3, connect the rope ends of the two winch wire ropes 9 to the first lifting lugs 12 located below them respectively; connect the rope ends of the two parallel beam hanging wire ropes 14 on the hanging beam 15 to the two second lifting lugs 13 symmetrically arranged on the upper opposite side walls of the steel pipe pile 11 respectively, and use the hook 16 on the crane ship 20 to lift the hanging beam 15

[0133] S4, the hook head 16 of the crane 20 is gradually lifted up, so that the steel pipe pile 11 is gradually separated from the barge 18, and the winch wire rope 9 is gradually lowered in coordination with the hook head 16 of the crane 20, so that the steel pipe pile 11 is gradually adjusted from a horizontal state to an inclined state; when the steel pipe pile 11 is gradually lifted to an angle of 60° between it and the horizontal plane, or the horizontal distance between the inner side edge of the top surface of the opposite side frame body of the opening end of the truss 1 and the steel pipe pile 11 is less than 3m, the hook head of the crane 20 stops lifting, and the winch wire rope 9 continues to be gradually lowered until the steel pipe pile 11 is adjusted to a vertical state;

[0134] S5, releasing the connection between the two hoist wire ropes 9 and the two first lifting ears 12, at which time the steel pipe pile 11 is just located at the pile sinking position;

[0135] S6. Install a pile driver on the horizontal plate 5 of the truss 1, and install three jacking devices 8 in the upper straightening mechanism and the lower straightening mechanism at intervals on the upper and lower inner sides of the opening of the truss 1, then weld the crossbeam provided with the jacking devices 8 to the opening end of the truss 1, so that the four jacking devices 8 in the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices 8 are located on the central axis of the opening of the truss 1; use the straightening mechanism to adjust the verticality of the steel pipe pile 11 to meet the construction requirements, then sink the steel pipe pile into the mud to a balanced state, and then use the pile driver to lift the pile hammer to sink the steel pipe pile to the designed elevation position;

[0136] S7, dismantle the hoisting mechanism, the pile driving frame and the straightening mechanism, release the positioning mechanism, move the pile stabilizing platform to the next pile construction position, repeat the above steps S1 to S6, and complete the construction of the next steel pipe pile.

[0137] Among the above four embodiments, the difference between Embodiment 4 and Embodiments 1 to 3 is that Embodiment 4 realizes the simultaneous completion of steel pipe pile erection and steel pipe pile stationing during the pile erection construction process through the reasonable setting of the lifting mechanism, that is, step 5 in Embodiment 1 is completed while step 6 in Embodiment 1 is completed, making the construction method simpler and easier to operate, thereby improving the construction efficiency.

Claims

1. An offshore large-diameter steel pipe piling device, characterized in that: include: The pile driving guide frame is composed of a truss (1) and four vertically arranged guide tubes (2); the truss (1) is a cubic structure with an opening on one side, and its transverse cross section is "concave"; the four guide tubes (2) are evenly distributed along the circumference of the truss (1) and fixed on the outside of the truss (1); A lifting mechanism comprises a horizontal plate (5) and two sets of lifting devices symmetrically and spaced apart on the horizontal plate (5); each set of lifting devices comprises a hoist (6) and a pulley (7) arranged in front of the hoist (6) and fixed at the edge of the horizontal plate (5); a hoist wire rope (9) is wound on the drum of the hoist (6), and the line between the hoist (6) and the pulley (7) is perpendicular to the side of the horizontal plate (5) to which the pulley (7) is fixed; the horizontal plate (5) is fixed on the top surface of the frame body opposite to the opening end of the truss (1), and the rope ends of the hoist wire ropes (9) on the two hoists (6) are respectively passed around the pulleys (7) located in front of them and naturally hang down on the inner side of the opening of the truss (1); A pile driving frame, which is fixed on the horizontal plate (5) and is located between the two sets of lifting devices; A straightening mechanism, comprising an upper straightening mechanism and a lower straightening mechanism arranged at intervals inside the opening of a truss (1); the upper straightening mechanism and the lower straightening mechanism have the same structure, both consisting of three jacking devices (8) fixed on the truss (1) and a crossbeam on which the jacking devices (8) are fixed, the crossbeam being detachably mounted on the opening end of the truss (1), so that the four jacking devices (8) in the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices (8) are located on the central axis of the opening of the truss (1); And a positioning mechanism, which comprises four positioning piles (4); the outer diameter of the positioning piles (4) is adapted to the inner diameter of the four guide pipes (2) on the pile driving guide frame.

2. An offshore large-diameter steel pipe piling device, characterized in that: include: The pile driving guide frame is composed of a truss (1) and four vertically arranged guide tubes (2); the truss (1) is a cubic structure with an opening on one side, and its transverse cross section is "concave"; the four guide tubes (2) are evenly distributed along the circumference of the truss (1) and fixed on the outside of the truss (1); A lifting mechanism comprises a horizontal plate (5) and two sets of lifting devices symmetrically and spaced apart on the horizontal plate (5); each set of lifting devices comprises a hoist (6) and a pulley (7) arranged in front of the hoist (6) and fixed at the edge of the horizontal plate (5); a hoist wire rope (9) is wound on the drum of the hoist (6), and the line between the hoist (6) and the pulley (7) is perpendicular to the side of the horizontal plate (5) to which the pulley (7) is fixed; the horizontal plate (5) is fixed on the top surface of the frame body opposite to the opening end of the truss (1), and the rope ends of the hoist wire ropes (9) on the two hoists (6) are respectively passed around the pulleys (7) located in front of them and naturally hang down on the inner side of the opening of the truss (1); A pile driving frame, which is fixed on the horizontal plate (5) and is located between the two sets of lifting devices; The straightening mechanism comprises a pile gripper (24); the pile gripper (24) is fixed on the side wall of the pile driving frame adjacent to the opening of the truss (1), and comprises at least two coaxially arranged annular arms, and a plurality of jacking devices are evenly arranged on each annular arm along the circumferential direction; the central axis of the annular arms coincides with the central axis of the opening of the truss (1); And a positioning mechanism, which comprises four positioning piles (4); the outer diameter of the positioning piles (4) is adapted to the inner diameter of the four guide pipes (2) on the pile driving guide frame.

3. The offshore large-diameter steel pipe piling device according to claim 1 or 2, characterized in that: The spacing between the two sets of hoisting devices is adapted to the diameter of the steel pipe pile, so that the spacing between the two hoisting machine wire ropes (9) thereon is the same as the spacing between the two lifting ears symmetrically arranged on the opposite sides of the steel pipe pile.

4. An offshore large-diameter steel pipe piling device, characterized in that: include: The pile driving guide frame is composed of a truss (1) and four vertically arranged guide tubes (2); the truss (1) is a cubic structure with an opening on one side, so that its transverse cross section is "concave"; the four guide tubes (2) are evenly distributed along the circumference of the truss (1) and fixed on the outside of the truss (1); The hoisting mechanism comprises two horizontal plates (5) and two sets of hoisting devices; each set of hoisting devices comprises a hoisting machine (6) fixed on the horizontal plate (5), a pulley (7) arranged at the front side of the hoisting machine (6) and fixed at the edge of the horizontal plate (5), and a wire rope ring (10) arranged below the pulley (7) and fixed on the horizontal plate (5); a hoisting machine wire rope (9) is wound on the drum of the hoisting machine (6), and the hoisting machine (6) and the pulley (7) are connected to each other. The connecting line between the two winches (7) is perpendicular to the side of the horizontal plate (5) on which the pulley (7) is fixed; the two horizontal plates (5) are respectively fixed on the top surface of the frame body on both sides of the open end of the truss (1), so that the two sets of lifting devices are symmetrically arranged, and the rope ends of the hoist wire ropes (9) on the two winches (6) are respectively passed around the pulley (7) located in front of them and passed through the wire rope ring (10) and then naturally fell to the outside of the frame body on one side of the open end of the truss (1); A pile driving frame fixed on the top surface of the frame body opposite to the open end of the truss (1); A straightening mechanism, comprising an upper straightening mechanism and a lower straightening mechanism which are arranged at intervals inside the opening of the truss (1); the upper straightening mechanism and the lower straightening mechanism have the same structure, both consisting of three jacking devices (8) fixed on the truss (1) and a crossbeam on which the jacking devices (8) are fixed, the crossbeam being detachably mounted on the opening end of the truss (1), so that the four jacking devices (8) of the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices (8) are located on the central axis of the opening of the truss (1); And a positioning mechanism, which comprises four positioning piles (4); the outer diameter of the positioning piles (4) is adapted to the inner diameter of the four guide pipes (2) on the pile driving guide frame.

5. An offshore large-diameter steel pipe piling device, characterized in that: include: The pile driving guide frame is composed of a truss (1) and four vertically arranged guide tubes (2); the truss (1) is a cubic structure with an opening on one side, so that its transverse cross section is "concave"; the four guide tubes (2) are evenly distributed along the circumference of the truss (1) and fixed on the outside of the truss (1); A lifting mechanism, comprising two horizontal plates (5) and two sets of lifting devices; each set of lifting devices comprises a winch (6) fixed on the horizontal plate (5), and a pulley (7) arranged in front of the winch (6) and fixed at the edge of the horizontal plate (5); a winch wire rope (9) is wound on the drum of the winch (6), and the line between the winch (6) and the pulley (7) is perpendicular to the side of the horizontal plate (5) to which the pulley (7) is fixed; the two horizontal plates (5) are respectively fixed on the top surface of the frame body located on both sides of the opening end of the truss (1), and the two sets of lifting devices are symmetrically and relatively arranged, so that the two winches (6) and the two pulleys (7) of the two sets of lifting devices are located on the same straight line; the rope ends of the winch wire ropes (9) on the two winches (6) are respectively passed around the pulleys (7) located in front of them and naturally hang down on the inner side of the opening of the truss (1); A pile driving frame fixed on the top surface of the frame body opposite to the open end of the truss (1); A straightening mechanism, comprising an upper straightening mechanism and a lower straightening mechanism which are arranged at intervals inside the opening of the truss (1); the upper straightening mechanism and the lower straightening mechanism have the same structure, both consisting of three jacking devices (8) fixed on the truss (1) and a crossbeam on which the jacking devices (8) are fixed, the crossbeam being detachably mounted on the opening end of the truss (1), so that the four jacking devices (8) of the same straightening mechanism are evenly distributed along the circumferential direction, and the center points of the four jacking devices (8) are located on the central axis of the opening of the truss (1) and at the midpoint of the line connecting the two winches (6) and the two pulleys (7) of the two sets of hoisting devices; And a positioning mechanism, which comprises four positioning piles (4); the outer diameter of the positioning piles (4) is adapted to the inner diameter of the four guide pipes (2) on the pile driving guide frame.

6. The offshore large-diameter steel pipe piling device according to any one of claims 1 to 4, characterized in that: The positioning mechanism also includes four suction cylinders (23) respectively arranged at the bottom ends of the four positioning piles (4); the bottom end of each positioning pile (4) is fixed at the center of the top surface of the suction cylinder (23) below it.

7. The offshore large-diameter steel pipe piling device according to claim 6, characterized in that: A fixed truss is also provided below the truss (1), and its four top corners are respectively fixed on the side walls at the bottom ends of four positioning piles (4), so that four suction cylinders (23) are simultaneously supported at the four top corners of the fixed truss; the fixed truss is a cubic structure with an opening on one side, and its opening is located on the same side as the opening of the truss (1), and the sizes of the two openings are the same.

8. A method for piling based on the offshore large-diameter steel pipe piling device according to claim 1, 2 or 4, characterized in that: Here are the steps: S1, dragging a pile stabilizing platform formed by assembling a pile driving guide frame and a positioning mechanism to a construction site, and after leveling, stably fixing it at the construction site through the positioning mechanism; at this time, the central axis of the opening of the truss (1) of the pile driving guide frame coincides with the central axis of the preset steel pipe pile (11) to be erected; S2, the crane vessel (20) and the barge (18) are stationed; wherein the barge (18) carries a steel pipe pile (11) horizontally, and the bottom of the steel pipe pile (11) extends a distance outside the barge (18), so that after the barge (18) is stationed, the bottom of the steel pipe pile (11) extending outside the barge (18) extends into the inside of the opening of the truss (1), and the two hoisting machine wire ropes (9) located above the steel pipe pile (11) and the two first lifting ears (12) symmetrically arranged on the opposite side walls of the bottom of the steel pipe pile (11) are located in the same vertical plane; the crane vessel (20) is stationed on the adjacent side of the barge (18); S3, respectively connecting the rope ends of the two hoisting machine steel wire ropes (9) to the first lifting lugs (12) located below them; respectively connecting the rope ends of the two parallel beam hanging steel wire ropes (14) on the hanging beam (15) to the two second lifting lugs (13) symmetrically arranged on the upper opposite side walls of the steel pipe pile (11), and lifting the hanging beam (15) by using the hook (16) on the crane ship (20) S4, the hook head (16) of the crane (20) is gradually lifted up, so that the steel pipe pile (11) and the barge (18) are gradually separated, and at the same time, the hoist wire rope (9) is gradually lowered in coordination with the hook head (16) of the crane (20), so that the steel pipe pile (11) is gradually adjusted from a horizontal state to an inclined state; when the steel pipe pile (11) is gradually lifted to an angle between it and the horizontal plane of 60° to 75°, or the horizontal distance from the side of the horizontal plate (5) on which the pulley (7) is fixed to the steel pipe pile (11) is 3 to 10 m, the hook head of the crane (20) stops lifting up, and at the same time, the hoist wire rope (9) continues to be gradually lowered until the steel pipe pile (11) is adjusted to a vertical state; S5, releasing the connection between the two hoisting machine wire ropes (9) and the two first lifting ears (12), and using the hook head (16) of the crane (20) to lift the steel pipe pile (11) to the pile sinking position through the lifting beam (15); S6. Install a pile driving frame and a straightening mechanism on the truss (1). After the straightening mechanism adjusts the verticality of the steel pipe pile (11) to meet the construction requirements, the steel pipe pile is sunk into the mud to a balanced state, and the pile driving frame is used to lift the pile hammer to sink the steel pipe pile to the designed elevation. S7, dismantle the hoisting mechanism, the pile driving frame and the straightening mechanism, release the positioning mechanism, move the pile stabilizing platform to the next pile construction position, repeat the above steps S1 to S6, and complete the construction of the next steel pipe pile.

9. A method for piling based on the offshore large-diameter steel pipe piling device according to claim 5, characterized in that: Here are the steps: S1, dragging a pile stabilizing platform formed by assembling a pile driving guide frame and a positioning mechanism to a construction site, and after leveling, stably fixing it at the construction site through the positioning mechanism; at this time, the central axis of the opening of the truss (1) of the pile driving guide frame coincides with the central axis of the preset steel pipe pile (11) to be erected; S2, the crane vessel (20) and the barge (18) are stationed; wherein the barge (18) carries a steel pipe pile (11) horizontally, and the bottom of the steel pipe pile (11) extends a distance outside the barge (18), so that after the barge (18) is stationed, the bottom of the steel pipe pile (11) extending outside the barge (18) extends into the inside of the opening of the truss (1), and the two hoisting machine wire ropes (9) located above the steel pipe pile (11) and the two first lifting ears (12) symmetrically arranged on the opposite side walls of the bottom of the steel pipe pile (11) are located in the same vertical plane; the crane vessel (20) is stationed on the adjacent side of the barge (18); S3, respectively connecting the rope ends of the two hoisting machine steel wire ropes (9) to the first lifting lugs (12) located below them; respectively connecting the rope ends of the two parallel beam hanging steel wire ropes (14) on the hanging beam (15) to the two second lifting lugs (13) symmetrically arranged on the upper opposite side walls of the steel pipe pile (11), and lifting the hanging beam (15) by using the hook (16) on the crane ship (20) S4, the hook head (16) of the crane (20) is gradually lifted up, so that the steel pipe pile (11) and the barge (18) are gradually separated, and at the same time, the winch wire rope (9) is gradually lowered in coordination with the hook head (16) of the crane (20), so that the steel pipe pile (11) is gradually adjusted from a horizontal state to a vertical state; when the steel pipe pile (11) is gradually lifted to an angle between it and the horizontal plane of 60° to 75°, or the horizontal distance between the inner side edge of the top surface of the opposite side frame body of the opening end of the truss (1) and the steel pipe pile (11) is 3 to 10 m, the hook head of the crane (20) stops lifting up, and at the same time, the winch wire rope (9) continues to be gradually lowered until the steel pipe pile (11) is adjusted to a vertical state; S5, releasing the connection between the two hoisting machine wire ropes (9) and the two first lifting ears (12), at which time the steel pipe pile (11) is just located at the pile sinking position; S6. Install a pile driving frame and a straightening mechanism on the truss (1). After the straightening mechanism adjusts the verticality of the steel pipe pile (11) to meet the construction requirements, the steel pipe pile is sunk into the mud to a balanced state, and the pile driving frame is used to lift the pile hammer to sink the steel pipe pile to the designed elevation. S7, dismantle the hoisting mechanism, the pile driving frame and the straightening mechanism, release the positioning mechanism, move the pile stabilizing platform to the next pile construction position, repeat the above steps S1 to S6, and complete the construction of the next steel pipe pile.

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