A suction pile guide structure for deep sea and a method for driving a pile thereof

Abstract

The application discloses a suction cylinder pile sinking guide structure for deep sea and a pile sinking operation method thereof, and the structure comprises a top platform, a guide frame and a suction cylinder group which are sequentially connected from top to bottom; the top platform is arranged with power control facilities, operation tools, a diesel generating set and an air compressor; the guide frame comprises an upper guide frame and a lower guide frame; a plurality of submersible pumps are evenly arranged in the upper guide frame in a circumferential direction; a plurality of guide cylinders are evenly arranged on the outer periphery of the lower guide frame; each submersible pump is communicated with the air compressor, the suction cylinder and the outer side of the upper guide frame through an operation manifold, so as to control the sinking and floating of the suction cylinder pile sinking guide structure; the suction cylinder pile sinking guide structure for deep sea and the pile sinking operation method thereof can not only adjust the posture of the guide frame by adjusting the valve pipelines of different submersible pumps during the whole sinking process, but also solve the problem of low construction efficiency of the pile sinking guide frame, improve the construction efficiency and progress, and improve the efficiency and quality of offshore wind power construction.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power construction, and in particular to a suction cylinder pile sinking guide structure for deep sea and a pile sinking operation method thereof. Background Art

[0002] In deep-sea offshore wind power construction, the pile sinking operation of wind turbine foundation piles faces many challenges, including: 1) Limited pile sinking accuracy: Traditional guide frames lack precise adjustment and positioning means when positioning engineering piles, and have limited ability to detect and adjust the verticality of the pile body; 2) Poor stability: The design of traditional guide frames does not fully consider the stress conditions in the harsh environment of deep-sea. Under complex marine dynamic conditions such as strong winds, large waves and water impact, its structure is prone to large deformation. Due to unreasonable weight distribution or insufficient foundation fixing method, traditional guide frames are prone to overturning when subjected to large external forces; 3) Low construction efficiency: The installation and disassembly process of traditional guide frames is usually cumbersome. When installed at sea, it is affected by waves and sea winds, making the operation difficult, resulting in a long installation period. During the pile sinking process, if the height or level of the guide frame needs to be adjusted, multiple manual measurements and complex mechanical operations are required, which is inefficient and difficult to ensure accuracy. Therefore, based on the above-mentioned existing technical problems, it is necessary to design a suction cylinder pile sinking guide structure for deep-sea and a corresponding pile sinking operation method. Summary of the Invention

[0003] The object of the present invention is to provide a suction cylinder pile sinking guide structure for deep sea that solves the above technical problems.

[0004] Another object of the present invention is to provide a pile sinking method using the above-mentioned suction cylinder pile sinking guide structure for deep sea use.

[0005] To this end, the technical solution of the present invention is as follows:

[0006] A suction cylinder pile sinking guide structure for deep sea, comprising a top platform, a guide frame and a suction cylinder group connected in sequence from top to bottom; the guide frame comprises an upper guide frame, a lower guide frame, a guide cylinder group and a submersible pump group; wherein,

[0007] The top platform includes a horizontally arranged platform body, on the top surface of which power control facilities, working tools, diesel generator sets and air compressors are arranged at intervals along the circumference; the power control facilities, air compressors and submersible pump sets are electrically connected to the diesel generator sets respectively;

[0008] The upper guide frame includes N first guide frame legs, which are evenly distributed along the circumferential direction with their top ends obliquely facing inward, and the top end of each first guide frame leg is fixed to the bottom surface of the platform along the circumference of the top platform;

[0009] The lower guide frame comprises N second guide frame legs arranged vertically, the top ends of which are fixed to the bottom ends of the first guide frame legs one by one respectively; a plurality of second cross braces are fixed between every two adjacent second guide frame legs from top to bottom in sequence, and a guide cylinder mounting frame is formed by extending the middle part of two second cross braces located at the middle position outward in the horizontal direction.

[0010] The guide cylinder group comprises N guide cylinders arranged vertically in the guide cylinder mounting frames one by one respectively and adapted to the preset pile sinking position.

[0011] The submersible pump group is composed of N submersible pumps arranged at the N second guide frame legs respectively.

[0012] A lumen is arranged in each connected first guide frame leg and second guide frame leg and communicates with each other, and a sealing plate on which a suction cylinder connecting port K3 is arranged is fixed horizontally in the first guide frame leg, and an outer connecting port K4 is arranged on the pipe wall; the top end of the suction cylinder connecting port K3 extends to the top platform through a first conveying pipeline to be connected with the air outlet end K6 of the air compressor or directly communicated with the atmosphere; the bottom end of the suction cylinder connecting port K3 is connected with the connecting port K5 on the lower suction cylinder through a second conveying pipeline; the water inlet end K1 of the submersible pump is connected with the suction cylinder connecting port K3 and the outer connecting port K4 through a third conveying pipeline and a fourth conveying pipeline respectively; the water outlet end K2 of the submersible pump is connected with the suction cylinder connecting port K3 and the outer connecting port K4 through a fifth conveying pipeline and a sixth conveying pipeline respectively; an electric control valve is arranged on each conveying pipeline, and each electric control valve is electrically connected with the power control facility.

[0013] In the above-mentioned suction cylinder pile sinking guide structure for deep sea, the value of N is adapted to the appropriate number of guide cylinders arranged around the lower guide frame in actual construction operation, N is a positive integer, and N≥3.

[0014] Further, four lifting lugs are arranged on the top surface of the top platform in a circumferential direction.

[0015] Further, a safety fence is arranged around the top surface of the top platform in a circumferential direction, and a plurality of lifesaving facilities and a plurality of lighting facilities are installed on the safety fence.

[0016] Further, in the upper guide frame, at least one first cross brace is arranged between every two adjacent first guide frame legs, and two first diagonal braces are arranged on the upper and lower sides of each first cross brace, the two first diagonal braces are cross-fixed and the two ends thereof are fixed on the two first guide frame legs respectively.

[0017] Further, on the lower guide frame, the guide cylinder mounting frame comprises two support beams vertically and fixedly arranged on each second cross brace, and in the two guide cylinder mounting frames arranged in upper and lower positions, a plurality of vertical braces and / or two oblique braces arranged in a cross manner are vertically and fixedly arranged between every two support beams arranged in upper and lower positions; a plurality of second oblique braces are respectively fixedly connected between the top end of each second guide frame leg and the two ends of the support beam of the adjacent side guide cylinder mounting frame, between the middle part of each second guide frame leg and the two ends of the support beam of the adjacent side guide cylinder mounting frame, and between the bottom end of each second guide frame leg and the two ends of the support beam of the adjacent side guide cylinder mounting frame.

[0018] Further, the lower guide frame further comprises a reinforcing beam group; the reinforcing beam group is composed of a plurality of horizontally arranged reinforcing beams, which are respectively fixedly connected between each adjacent two second cross braces, between each adjacent support beam and second cross brace, and between each adjacent two support beams.

[0019] Further, the guide cylinder comprises a cylindrical cylinder segment and a conical cylinder segment formed by extending outward along the axis from the top end of the cylindrical cylinder segment, the inner diameter of the conical cylinder segment gradually increases from bottom to top; a plurality of limiting mechanisms are arranged on the side wall of the top end and the side wall of the bottom end of the cylindrical cylinder segment in the circumferential direction respectively, and the length of the limiting mechanism in the cylindrical cylinder segment is adjusted to limit the radial position of the engineering pile inserted in the guide cylinder.

[0020] Further, the sealing plate divides the inner cavity of the first guide frame leg into an upper cavity and a lower cavity, the bottom of the upper cavity is divided into a submersible pump mounting cavity and a pipe manifold setting cavity by an isolation plate vertically fixed on the top surface of the sealing plate and the inner wall on both sides of the pipe body, so that the submersible pump is built-in in the submersible pump mounting cavity and fixed on the sealing plate by a support pier; a cooling water pipe is arranged in the submersible pump mounting cavity, one end of the cooling water pipe is located at the bottom of the submersible pump mounting cavity, and the other end extends to the top platform, so as to be connected with a small pump arranged on the top platform; the suction cylinder connection port K3 and the outer connection port K4 are arranged on the sealing plate and the pipe wall in the pipe manifold setting cavity respectively.

[0021] Further, the suction cylinder group is composed of N suction cylinders, which are respectively arranged below each second guide frame leg, so that the bottom end of the second guide frame leg is vertically fixed at the center of the top surface of each suction cylinder.

[0022] A pile sinking operation method using the above-mentioned suction cylinder pile sinking guide structure for deep sea is as follows:

[0023] S1, according to the number of engineering piles forming the pile foundation and the preset distance between the engineering piles, the suction cylinder pile sinking guide structure is customized, and the assembly and connection are completed on land in the prefabrication factory or the construction site;

[0024] S2, using a large transport ship, the assembled suction cylinder pile sinking guide structure is transported to the designated deep sea operation sea area;

[0025] S3, the suction cylinder pile sinking guide structure is hoisted to the designated position by the crane ship and is lowered into the water; through the power control facility, the electric control valves on the first conveying pipeline and the second conveying pipeline in each first guide frame leg are opened, the electric control valves on the rest of the pipelines remain closed, the suction cylinder pile sinking guide structure gradually sinks to the seabed until a stable state by relying on the self weight, then through the power control facility, the electric control valves on the second conveying pipeline, the third conveying pipeline and the sixth conveying pipeline in each first guide frame leg are opened, the electric control valves on the rest of the pipelines remain closed, the submersible pump is started, the water in the suction cylinder is pumped out and discharged into the seawater, the suction cylinder pile sinking guide structure continues to sink under the action of negative pressure until sinking to the designated depth position;

[0026] S4, according to the diameter and root opening requirements of the engineering pile, the suction cylinder pile sinking guide structure is leveled, and the limiting mechanisms on the upper and lower sides of the guide cylinder are adjusted to adapt to the outer diameter of the engineering pile and the pile sinking position; the engineering pile is accurately inserted into the limiting cylinder through the pile feeder, and the pile sinking operation is performed by using the pile driving equipment;

[0027] S5, after the pile sinking is completed, the crane ship is connected with the suction cylinder pile sinking guide structure again; through the power control facility, the electric control valves on the second conveying pipeline, the fourth conveying pipeline and the fifth conveying pipeline in each first guide frame leg are opened, the electric control valves on the rest of the pipelines remain closed, the suction cylinder is filled with water to drive the suction cylinder pile sinking guide structure to float up; then, through the power control facility, the electric control valves on the first conveying pipeline and the second conveying pipeline in each first guide frame leg are opened, the electric control valves on the rest of the pipelines remain closed; the other end of each first conveying pipeline is connected with the air outlet end of the air compressor, the air compressor is started to inject air into the suction cylinder to drain water, at the same time, the suction cylinder pile sinking guide structure is slowly lifted off the sea surface by the crane ship and is placed on the transport ship to be transported back to land.

[0028] Compared with the existing pile sinking guide frame, the suction cylinder pile sinking guide structure for deep sea and the pile sinking operation method thereof can not only adjust the posture of the guide frame by adjusting the valve pipelines of different submersible pumps during the entire sinking process, but also solve the problem of low construction efficiency of the pile sinking guide frame, the pile sinking guide frame can be sunk to the position only by three hours through the self-sinking of the pile sinking frame and the water pumping sinking of the submersible pump, the construction efficiency and progress are greatly improved, and the offshore wind power construction efficiency and quality are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 it is a structural schematic view of the suction cylinder pile sinking guide structure for deep sea in the embodiments of the present application;

[0030] Figure 2Fig. 1 is a top view of a top platform of a suction cylinder pile driving guide structure for deep sea in an embodiment of the present application;

[0031] Figure 3 Fig. 2 is a top view of a lower guide frame of a suction cylinder pile driving guide structure for deep sea in an embodiment of the present application;

[0032] Figure 4 Fig. 3 is a schematic diagram of an internal structure of a first guide frame leg built-in submersible pump portion of a suction cylinder pile driving guide structure for deep sea in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The present application will be further described below in conjunction with the drawings and specific embodiments, but the following embodiments are by no means limiting to the present application.

[0034] Referring to Figure 1 , the suction cylinder pile driving guide structure for deep sea comprises a top platform 1, a guide frame and a suction cylinder group connected in sequence from top to bottom.

[0035] Referring to Figure 2 , the top platform 1 comprises a horizontally arranged rectangular table body, and four edges of a top surface of the table body are respectively provided with a first container 9 built-in with power control facilities, a second container 10 built-in with operation tools, a third container 11 built-in with a diesel generator set and a fourth container 12 built-in with an air compressor; wherein the diesel generator set is electrically connected with the power control facilities and the air compressor respectively to supply power; the air compressor is used for pumping compressed air; the first container 9 serves as a control room, and the built-in power control facilities are electrically connected with electric control valves or electric control devices arranged on an upper pipe manifold of the lower guide frame through lines to control opening and closing of each electric control valve during operation, thereby completing pile driving operation; the operation tools arranged in the second container 10 include but are not limited to small pumps, maintenance tools, different pipelines that can be replaced, etc.

[0036] As a preferred technical solution of the present embodiment, a lifting lug 8 is arranged at each of four top corners of the table body top surface of the top platform 1 to be used for integral lifting of the structure.

[0037] As another preferred technical solution of the present embodiment, in order to guarantee operation safety of the top platform, a safety fence is arranged on the table body top surface of the top platform 1 and around the circumferential edge of the table body, and a plurality of lifesaving facilities and a plurality of lighting facilities are installed on the safety fence.

[0038] The top platform with integrated functional structure can be connected with the guide frame through various ways such as welding, bolts or pins in actual application, which not only facilitates convenient installation of the suction cylinder pile driving guide structure, but also has the advantage of being directly disassembled and lifted away under bad weather conditions or large waves.

[0039] Referring to Figure 1 and Figure 3 The guide frame comprises an upper guide frame 2, a lower guide frame 3, a guide cylinder group and a submersible pump group.

[0040] The upper guide frame 2 comprises four first guide frame legs 201 and four first cross braces 202; wherein the four first guide frame legs 201 are arranged in a circumferential direction in a manner that the top ends are inclined inwardly, and the top ends of the four first guide frame legs 201 are fixed at the four top corners of the bottom surface of the platform body of the top platform 1; the four first cross braces 202 are respectively arranged and fixed at the middle portions of every two adjacent first guide frame legs 201; two first inclined braces 203 are respectively arranged and fixed between the two first guide frame legs 201 above and below each first cross brace 202, and the middle portions of the two first inclined braces 203 are fixedly connected, and the two ends of the two first inclined braces 203 are respectively fixed on the two first guide frame legs 201.

[0041] In the embodiment, the first guide frame legs 201, the first cross braces 202 and the first inclined braces 203 are all made of high-strength alloy steel pipes, so as to ensure the strength and toughness of the whole guide frame to withstand the impact of the sea swell; and the first cross braces 202 and the first inclined braces 203 are arranged in the concentrated stress area of the upper guide frame 2, so as to strengthen the structure, and in actual application, the first cross braces 202 and the first inclined braces 203 can disperse the impact of the swell and the seawater pressure, and avoid local deformation.

[0042] The lower guide frame 3 comprises four second guide frame legs 301, which are arranged in a circumferential direction in a manner that the top ends are vertically arranged, and the top ends of the four second guide frame legs 301 are fixedly connected to the bottom ends of the four first guide frame legs 201 through flanges; four second cross braces 302 are sequentially and fixedly connected between every two second guide frame legs 301 from top to bottom, and the middle portions of the two second cross braces 302 located at the middle positions extend outwardly and horizontally to form guide cylinder mounting racks; a plurality of second inclined braces 304 are arranged on the lower guide frame 3, and are respectively fixed between the top ends of the second guide frame legs 301 and the two ends of the support beams 303 of the adjacent side guide cylinder mounting racks, the middle portions of the second guide frame legs 301 and the two ends of the support beams 303 of the adjacent side guide cylinder mounting racks, and the bottom ends of the second guide frame legs 301 and the two ends of the support beams 303 of the adjacent side guide cylinder mounting racks.

[0043] In the embodiment, the guide cylinder mounting frame comprises two support beams 303 which are spaced apart and vertically fixed on the second cross brace 302, and the spacing between the two support beams 303 is adapted to the diameter of the guide cylinder 6; in the two guide cylinder mounting frames arranged in an upper and lower manner, a plurality of vertical braces and / or two oblique braces arranged in a cross manner are vertically fixed between every two support beams 303 arranged in an upper and lower manner, so as to enhance the structural support strength between the two guide cylinder mounting frames.

[0044] As a preferred technical solution of the embodiment, the lower guide frame 3 further comprises a reinforcing beam group; the reinforcing beam group is composed of a plurality of reinforcing beams 305 arranged in a horizontal manner, which are respectively arranged and fixed between adjacent two second cross braces 302, between adjacent support beams 303 and second cross braces 302, and between adjacent two support beams 303; and each reinforcing beam 305 is arranged in a spaced manner inside the second oblique brace 304 at the same height and in parallel.

[0045] Similarly, in the embodiment, the second guide frame leg 301, the second cross brace 302 and the second oblique brace 303 are all made of high-strength alloy steel pipes, so as to ensure that the strength and toughness of the whole guide frame can withstand the impact of offshore swells; and the second cross brace 302 and the second oblique brace 303 are arranged in the concentrated stress area of the upper guide frame 2, so as to be structurally reinforced, and in actual application, the swells impact and seawater pressure are dispersed, and local deformation is avoided.

[0046] The guide cylinder group comprises four guide cylinders 6 which are vertically arranged one by one in each guide cylinder mounting frame; specifically, the guide cylinder 6 comprises a cylindrical cylinder segment, the inner diameter of which is adapted to the outer diameter of the pile body to be sunk; a conical cylinder segment with an increasing inner diameter from top to bottom is formed along the axis outward from the top end of the cylindrical cylinder segment, so as to guide the pile body lowered and inserted into the guide cylinder 6; eight limiting mechanisms are arranged on the top end side wall and the bottom end side wall of the cylindrical cylinder segment in the circumferential direction respectively, and the eight limiting mechanisms realize the diameter limiting action of the engineering pile inserted into the guide cylinder 6 by adjusting the length thereof in the cylindrical cylinder segment; a plurality of connecting parts are arranged in a horizontal direction from the top end outer wall and the bottom end outer wall of the cylindrical cylinder segment respectively and in a spaced manner, so that the guide cylinder 6 is erected and fixed on every two side support beams 303 of the two guide cylinder mounting frames arranged in an upper and lower manner through the plurality of connecting parts on the top side and the connecting parts on the bottom side thereof.

[0047] In the embodiment, the limiting mechanism can adopt an electric push rod, which is arranged in a manner that the movable push rod is axially towards the cylindrical barrel segment, the cylinder barrel is vertically arranged through and fixed in the radial installation through hole of the side wall of the cylindrical barrel segment, and the electric push rod is electrically connected with the power control device in the first container 9 through a line, so as to adjust the extension length of the movable push rod of the electric push rod through the power control device, thereby limiting the pile body inserted in the guide cylinder 6, and ensuring that the pile body remains in a vertical arrangement state to complete pile sinking.

[0048] In the guide frame, the first guide frame leg 201 and the second guide frame leg 301 both adopt a pipe body with a sufficient inner cavity size, so as to arrange the working facilities and the working manifold therein; specifically, referring to Figure 1 and Figure 4 ,

[0049] In the middle part of the pipe body of each first guide frame leg 201, a sealing plate 2011 is horizontally fixed, so as to separate the inner cavity of each first guide frame leg 201 into an upper cavity and a lower cavity, and the upper cavity is further separated into a submersible pump installation cavity and a manifold setting cavity through the isolation plate 2012 which is vertically fixed on the top surface of the sealing plate 2011 and the inner walls of the pipe body on both sides, so that in actual application, the submersible pump installation cavity can contain water, and the manifold setting cavity always remains dry, which is more conducive to setting the valves for connecting the pipelines and controlling the opening and closing of the pipelines therein; a cooling water pipe is arranged in the submersible pump installation cavity, one end of the cooling water pipe is located in the submersible pump installation cavity, and the other end extends to the top platform 1, so as to be connected with a small pump arranged on the top platform 1; in the actual construction process, first, the small pump machine pumps seawater into the submersible pump installation cavity through the cooling water pipe, so that the submersible pump 5 is immersed in water, so as to be cooled during work; then, after the construction work is completed, the small pump machine completely pumps out the seawater in the submersible pump installation cavity through the cooling water pipe, waiting for the next operation; in the manifold setting cavity, the sealing plate is provided with a suction cylinder connection port K3 which communicates the manifold setting cavity with the lower cavity, and the pipe wall is provided with an outer connection port K4 which communicates the manifold setting cavity with the outside of the first guide frame leg 201; a ladder 2013 is arranged on the opposite inner wall of each first guide frame leg 201, so as to facilitate the regular maintenance or repair of the above-mentioned facilities;

[0050] The submersible pump set is composed of four submersible pumps 5, which are respectively arranged in the submersible pump installation cavities of the four first guide frame legs 201, and specifically, are fixed on the top surface of the sealing plate in the left cavity through a support pier; among them, each submersible pump 5 is preferably arranged at a height position 42 m away from the bottom end of the second guide frame leg 301; the submersible pump located in each submersible pump installation cavity is respectively provided with a water inlet end K1 and a water outlet end K2;

[0051] In the pipe body of each first guide frame leg 201, the top end of the suction cylinder connection port K3 extends to the top platform 1 through the first conveying pipeline for connection with the air outlet end K6 of the air compressor or direct communication with the atmosphere, and the bottom end of the suction cylinder connection port K3 is connected with the connection port K5 on the lower suction cylinder through the second conveying pipeline; the water inlet end K1 of the submersible pump is connected with the suction cylinder connection port K3 and the outer connection port K4 through the third conveying pipeline and the fourth conveying pipeline respectively; the water outlet end K2 of the submersible pump is connected with the suction cylinder connection port K3 and the outer connection port K4 through the fifth conveying pipeline and the sixth conveying pipeline respectively; an electric control valve is arranged on each conveying pipeline, and each electric control valve is electrically connected with the power control facility through a line.

[0052] The suction cylinder group is composed of four suction cylinders 7, which are arranged below the four second guide frame legs 302, and the bottom end of each second guide frame leg 302 is vertically fixed at the center of the top surface of the cover plate of the lower suction cylinder 7 to connect and fix the suction cylinder group at the bottom of the guide frame.

[0053] Referring to Figure 4 The specific implementation steps of the pile sinking construction process realized by the suction cylinder pile sinking guide frame cylinder base structure are as follows:

[0054] S1, customizing and installing the suction cylinder pile sinking guide structure:

[0055] According to the number of engineering piles required by the construction operation requirements to form the pile foundation, the suction cylinder pile sinking guide structure with four guide cylinders 6 is customized, and the spacing between the guide cylinders 6 is adapted to the preset spacing between the engineering piles; the components are assembled and connected on land in a prefabrication factory or a construction site, and the entire steel structure is subjected to corrosion protection treatment, and rust removal and painting operations are performed according to the painting scheme;

[0056] S2, using a large transport ship to transport the assembled suction cylinder pile sinking guide structure to a designated deep sea operation sea area; wherein, during transportation, the suction cylinder pile sinking guide structure is fixed and protected to prevent damage caused by wave impact and other factors;

[0057] S3, lowering the suction cylinder pile sinking guide structure:

[0058] After the suction cylinder pile sinking guide structure is transported to the designated operation sea area, it is lifted to the designated position by the crane ship and lowered into the water; at the same time, through the power control facility, the electric control valves on the first conveying pipeline and the second conveying pipeline in each first guide frame leg are opened, and the electric control valves on the remaining pipelines are in a closed state, so that the suction cylinder pile sinking guide structure gradually sinks to the seabed relying on its own weight until it reaches a stable state; in this process, the air in each suction cylinder is discharged into the atmosphere through the second conveying pipeline and the first conveying pipeline connected thereto;

[0059] When the suction cylinder pile sinking guide structure sinks to the seabed by its own weight and is in a stable state, the electric control valves on the second, third and sixth conveying pipelines in each first guide frame leg are opened by the power control facility, the electric control valves on the rest of the pipelines are closed, and the submersible pump is started to extract water in the suction cylinder and finally discharge it to the sea water through the external connection port K4, so that the suction cylinder pile sinking guide structure continues to sink under the action of negative pressure until it sinks to the designated depth position.

[0060] S4, pile sinking operation:

[0061] According to the diameter of the engineering pile and the root opening requirement, after the suction cylinder pile sinking guide structure is leveled, the extension length of the limiting mechanism on the upper and lower sides of the guide cylinder in the limiting cylinder is adjusted to adapt to the outer diameter of the engineering pile and the pile sinking position; the engineering pile is accurately inserted into the limiting cylinder through the pile feeder, and then the pile sinking equipment is used for pile sinking operation; during the pile sinking process, each limiting cylinder provides accurate guidance for the engineering pile to ensure that the engineering pile sinks to the predetermined depth in the seabed according to the design requirement and ensures the pile sinking accuracy;

[0062] S3, post-processing after pile sinking operation:

[0063] After the pile sinking is completed, the suction cylinder pile sinking guide structure is connected with the crane ship again, the electric control valves on the second, fourth and fifth conveying pipelines in each first guide frame leg are opened by the power control facility, the electric control valves on the rest of the pipelines remain closed, and the submersible pump is started to inject external sea water into the suction cylinder through the submersible pump through the external connection port K4, so that the inner cavity of each suction cylinder drives the suction cylinder pile sinking guide structure to gradually float up by water injection;

[0064] When the suction cylinder pile sinking guide structure floats to a stable state, the electric control valves on the first and second conveying pipelines in each first guide frame leg are opened by the power control facility, the electric control valves on the rest of the pipelines remain closed, the other end of each first conveying pipeline is connected with the air outlet end K6 of the air compressor, the air compressor is started to inject air into the suction cylinder to discharge water, at the same time, the suction cylinder pile sinking guide structure is slowly lifted off the sea surface by the crane ship and placed on the transport ship to be transported back to land, and maintenance, repair or storage are carried out to prepare for the next use.

Claims

1. A suction tube pile sinking guide structure for deep sea, characterized in that: The invention comprises a top platform (1), a guide frame and a suction cylinder group connected in sequence from top to bottom; the guide frame comprises an upper guide frame (2), a lower guide frame (3), a guide cylinder group and a submersible pump group; wherein, the top platform (1) comprises a horizontally arranged platform body, the top surface of which is provided with power control facilities, working tools, a diesel generator set and an air compressor at intervals along the circumference; the power control facilities, the air compressor and the submersible pump group are electrically connected to the diesel generator set respectively; the upper guide frame (2) comprises N first guide frame legs (201), which are uniformly arranged in the circumferential direction with the top end inclined inward, and the top end of each first guide frame leg (201) is fixed to the bottom surface of the platform body along the circumference of the top platform (1); the lower guide frame (3) comprises N vertically arranged second guide frame legs (201) The top ends of the guide frame legs (301) are fixed to the bottom ends of the first guide frame legs (201) in a one-to-one correspondence; a plurality of second cross braces (302) are fixed and connected in sequence from top to bottom between every two adjacent second guide frame legs (301), and a guide cylinder mounting frame is formed by extending outward in the horizontal direction from the middle of the two second cross braces (302) located in the middle position; the guide cylinder group includes N guide cylinders (6), which are respectively and vertically arranged in each guide cylinder mounting frame in a one-to-one correspondence and adapted to the preset pile sinking position; the submersible pump group is composed of N submersible pumps (5); a connected tube cavity is provided in each connected first guide frame leg (201) and second guide frame leg (301), and a tube cavity is provided in the first guide frame leg (201). 1) A sealing plate for arranging a submersible pump (5) is fixed horizontally therein; the sealing plate divides the inner cavity of the first guide frame leg (401) into an upper cavity and a lower cavity, and the bottom of the upper cavity is divided into a submersible pump installation cavity and a manifold installation cavity by an isolation plate vertically fixed on the top surface of the sealing plate and on the inner walls of both sides of the pipe body, so that the submersible pump (5) is built into the submersible pump installation cavity and fixed to the sealing plate through a buttress; a cooling water pipe is arranged in the submersible pump installation cavity, one end of the cooling water pipe is located at the bottom of the submersible pump installation cavity, and the other end extends to the top platform (1) for connection with a small pump arranged on the top platform (1); a suction cylinder connection port K3 and an external connection port K4 are respectively arranged on the sealing plate and the pipe wall in the manifold installation cavity; a suction cylinder connection port K3 is arranged on the sealing plate and the pipe wall in the manifold installation cavity; a suction cylinder connection port K4 is arranged on the sealing plate and the pipe wall in the manifold installation cavity Port K3, an external connection port K4 is provided on the pipe wall; the top of the suction cylinder connection port K3 extends to the top platform (1) through the first delivery pipeline, so as to be connected to the air outlet K6 of the air compressor or directly communicated with the atmosphere; the bottom of the suction cylinder connection port K3 is connected to the connection port K5 on the suction cylinder below through the second delivery pipeline; the water inlet end K1 of the submersible pump is connected to the suction cylinder connection port K3 and the external connection port K4 through the third delivery pipeline and the fourth delivery pipeline respectively; the water outlet end K2 of the submersible pump is connected to the suction cylinder connection port K3 and the external connection port K4 through the fifth delivery pipeline and the sixth delivery pipeline respectively; an electric control valve is provided on each delivery pipeline, and each electric control valve is electrically connected to the power control facility.

2. The suction cylinder pile sinking guide structure for deep sea according to claim 1 is characterized in that: Four lifting ears (8) are evenly distributed along the circumference at the edge of the top surface of the top platform (1).

3. The suction cylinder pile sinking guide structure for deep sea according to claim 1 is characterized in that: On the top surface of the platform body of the top platform (1), a safety fence is arranged around the circumferential edge of the platform body, and a plurality of life-saving facilities and a plurality of lighting facilities are installed on the safety fence.

4. The suction cylinder pile sinking guide structure for deep sea according to claim 1, characterized in that: In the upper guide frame (2), at least one first cross brace (202) is arranged between every two adjacent first guide frame legs (201), and two first diagonal braces (203) are arranged crosswise on the upper and lower sides of each first cross brace (202). The two first diagonal braces (203) are crosswise fixed, and their two ends are respectively fixed to the two first guide frame legs (201).

5. The suction cylinder pile sinking guide structure for deep sea according to claim 1 is characterized in that: On the lower guide frame (3), the guide cylinder mounting frame includes two support beams (303) vertically and fixed at intervals on each second cross brace (302), and in the two guide cylinder mounting frames arranged in an upper and lower manner, a plurality of vertical braces and / or two cross-arranged diagonal braces are vertically fixed at intervals between each two support beams (303) arranged in an upper and lower manner; a plurality of second diagonal braces (304) are respectively connected and fixed between the top end of each second guide frame leg (301) and the two ends of the support beam (303) of the adjacent side guide cylinder mounting frame, between the middle part of each second guide frame leg (301) and the two ends of the support beam (303) of the adjacent side guide cylinder mounting frame, and between the bottom end of each second guide frame leg (301) and the two ends of the support beam (303) of the adjacent side guide cylinder mounting frame.

6. The suction cylinder pile sinking guide structure for deep sea according to claim 5, characterized in that: The lower guide frame (3) also includes a reinforcement beam group; the reinforcement beam group is composed of a plurality of horizontally arranged reinforcement beams (305), which are respectively connected and fixed between each adjacent two second cross braces (302), between each adjacent support beam (303) and the second cross brace (302), and between each adjacent two support beams (303).

7. The suction cylinder pile sinking guide structure for deep sea use according to claim 1, characterized in that: The guide cylinder (6) comprises a cylindrical cylinder section and a tapered cylinder section extending outwardly from the top end of the cylindrical cylinder section along the axis, the inner diameter of which gradually increases from bottom to top; a plurality of limiting mechanisms are respectively provided along the circumferential direction on the top end side wall and the bottom end side wall of the cylindrical cylinder section, and the plurality of limiting mechanisms radially limit the engineering piles inserted in the guide cylinder (6) by adjusting their lengths in the cylindrical cylinder section.

8. The suction cylinder pile sinking guide structure for deep sea according to claim 1, characterized in that: The suction cylinder group is composed of N suction cylinders (7), which are respectively arranged below each second guide frame leg (301), so that the bottom end of the second guide frame leg (301) is vertically fixed at the center of the top surface of each suction cylinder (7).

9. A pile sinking method using the deep-sea suction drum pile sinking guide structure according to any one of claims 1 to 8, characterized in that: Here are the steps: S1. Customize the suction drum pile sinking guide structure based on the number of engineering piles forming the pile foundation and the preset spacing between the engineering piles, and complete the assembly and connection at the prefabrication factory or on land at the construction site; S2. Use a large transport vessel to transport the assembled suction cylinder pile sinking guide structure to the designated deep-sea operation area; S3. Use a crane vessel to hoist the suction cylinder pile sinking guide structure to a designated location and lower it into the water; use a power control device to open the electrically controlled valves on the first and second conveying pipelines in each first guide frame leg, while keeping the electrically controlled valves on the other pipelines closed, so that the suction cylinder pile sinking guide structure gradually sinks to the seabed by its own weight until it reaches a stable state; then, use the power control device to open the electrically controlled valves on the second, third, and sixth conveying pipelines in each first guide frame leg, while keeping the electrically controlled valves on the other pipelines closed, start the submersible pump, extract water from the suction cylinder and discharge it into the seawater, so that the suction cylinder pile sinking guide structure continues to sink under the action of negative pressure until it sinks to the designated depth; S4. Level the suction cylinder pile sinking guide structure according to the diameter and root opening requirements of the engineering pile, and adjust the upper and lower limit mechanisms of the guide cylinder to adapt it to the outer diameter of the engineering pile and the pile sinking position; accurately insert the engineering pile into the limit cylinder using the pile driver, and use the piling equipment to carry out the pile sinking operation; S5. After the pile sinking is completed, the crane ship is hoisted and connected to the suction cylinder pile sinking guide structure again; the electric control valves on the second conveying pipeline, the fourth conveying pipeline and the fifth conveying pipeline in each first guide frame leg are opened through the power control facility, and the electric control valves on the other pipelines remain closed, so that the suction cylinder is filled with water to drive the suction cylinder pile sinking guide structure to float; then, the electric control valves on the first conveying pipeline and the second conveying pipeline in each first guide frame leg are opened through the power control facility, and the electric control valves on the other pipelines remain closed; the other end of each first conveying pipeline is connected to the air outlet end of the air compressor, and while the air compressor is turned on to inject air and drain water into the suction cylinder, the suction cylinder pile sinking guide structure is slowly lifted off the sea surface by the crane ship, and placed on the transport ship for transportation back to land.

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