A soil plug prevention structure for a polygonal suction cylinder penetrating into soil and its construction method

Abstract

A soil plug prevention structure for a polygonal suction cylinder penetrating into soil, comprising a tower barrel and a plurality of suction cylinders, further comprising a high-pressure water soil-breaking mechanism and a mud suction mechanism. The high-pressure water soil-breaking mechanism is used to input high-pressure water for flushing the blocked soil into the suction cylinder, and the mud suction mechanism is used to suck the mud lifted by the high-pressure water from the suction cylinder. There is a common cylinder plate between two adjacent suction cylinders. A diversion channel extending along the moving direction of the suction cylinder is formed in the cylinder plate. A connecting shaft is slidably arranged in the diversion channel. A sliding plate is fixedly connected to each end of the connecting shaft. During the sliding process of the sliding plate, the diversion channel can be opened or closed. The present invention provides a soil plug prevention structure for a polygonal suction cylinder penetrating into soil and its construction method, which can remove the soil blocked in the suction cylinder during the process of the suction cylinder penetrating into the soil, achieving the effect of preventing soil plugging.

Description

Technical Field

[0001] The invention relates to the technical field of offshore wind power, and in particular to a soil plug structure in which a polygonal suction tube is penetrated into a soil body and a construction method thereof. Background Art

[0002] As a widely distributed, huge and renewable clean energy, wind power is developing rapidly around the world. With the acceleration of energy transformation at home and abroad, offshore wind power, as one of the main forms of zero-carbon energy, has made an important contribution to sustainable development. Offshore wind power has good stability, outstanding economic efficiency, and huge development potential, and has attracted the attention of many scholars and experts at home and abroad.

[0003] At present, the commonly used foundation types in offshore wind farms mainly include single pile foundation, gravity foundation, barrel foundation, jacket foundation and floating foundation. Among them, the suction barrel foundation has a simpler design and lower construction cost, showing great advantages in construction efficiency and economy, and has been applied in many wind farms at home and abroad. In actual engineering applications, it is found that during the penetration of the suction barrel foundation into the soil, especially in the later stage of sinking, the soil surface inside the barrel rises under the pressure difference between the inside and outside of the barrel or the seepage force, and contacts with the barrel top cover in advance in the later stage of barrel penetration, resulting in the foundation being unable to sink, forming a soil plug inside the suction barrel. The existence of soil plugs inside the barrel brings difficulties to the installation and construction of the foundation, affects the foundation sinking and bearing capacity during service, and also causes uneven settlement between the compartments of the multi-compartment suction barrel foundation under the action of vertical loads. It poses a great threat to the safe and efficient operation of wind turbines. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a soil plugging structure for a polygonal suction cylinder to be penetrated into the soil and a construction method thereof, which can remove the soil blocked in the suction cylinder during the process of the suction cylinder penetrating into the soil, thereby achieving the effect of soil plugging.

[0005] In order to achieve the above object, the specific scheme adopted by the present invention is:

[0006] A soil plugging structure in which a polygonal suction cylinder is inserted into a soil body, comprising a tower and a plurality of suction cylinders, and also comprising a high-pressure water soil-breaking mechanism and a mud suction mechanism, wherein the high-pressure water soil-breaking mechanism is used to input high-pressure water into the suction cylinder for flushing the blocked soil, and the mud suction mechanism is used to suck mud flushed by the high-pressure water from the suction cylinder;

[0007] The two adjacent suction cylinders have a common cylinder plate, on which a guide channel extending along the moving direction of the suction cylinder is provided, and a connecting shaft is slidably arranged in the guide channel, and each of the two ends of the connecting shaft is fixedly connected with a sliding plate, and the guide channel can be opened or closed during the sliding process of the sliding plate.

[0008] Preferably, the high-pressure water soil breaking mechanism includes a plurality of inner barrel pipes correspondingly arranged in the suction barrel. The inner barrel pipes are annular and fixedly arranged on the inner wall of the upper end of the suction barrel. The inner barrel pipes are provided with a plurality of high-pressure water outlets.

[0009] Preferably, the high-pressure water soil breaking mechanism includes an annular high-pressure water soil breaking main pipe. The high-pressure water soil breaking main pipe is communicated with a plurality of high-pressure water soil breaking branch pipes. The high-pressure water soil breaking branch pipes are correspondingly communicated with the inner barrel pipes.

[0010] Preferably, a high-pressure pump is arranged on the high-pressure water soil breaking main pipe, and a water inlet valve and a pressure sensor are arranged on the high-pressure water soil breaking branch pipes.

[0011] Preferably, the suction mud mechanism includes a plurality of suction mud pipeline branch pipes. The suction mud pipeline branch pipes correspondingly extend into the suction barrel. A slurry pumping valve and a flow meter are arranged on the suction mud pipeline branch pipes. All the suction mud pipeline branch pipes are commonly communicated with a suction mud pipeline main pipe. A mud pump is arranged on the suction mud pipeline main pipe.

[0012] Preferably, a top liquid outlet of the barrel is opened at the top of the suction barrel.

[0013] Preferably, a floating plate perpendicular to the sliding plate is fixedly connected to the bottom of the sliding plate. The floating plate extends towards the middle of the suction barrel.

[0014] Preferably, the diversion channel is communicated with a jack extending upwards. A distance sensor is fixedly arranged in the jack. The connecting shaft is fixedly connected with a follower rod. The follower rod extends upwards into the jack.

[0015] Preferably, one of the suction barrels is located below the tower barrel, and the other suction barrels are evenly distributed along the circumferential direction of the tower barrel.

[0016] A construction method for a polygonal suction barrel to penetrate into the soil, based on the above-mentioned anti-soil plug structure for a polygonal suction barrel to penetrate into the soil, the method includes the following steps:

[0017] Drive the tower barrel and the suction barrel to move downwards into the seawater;

[0018] When the soil enters the suction barrel and causes blockage, use the high-pressure water soil breaking mechanism to input high-pressure water into the suction barrel to wash up the soil to form slurry;

[0019] Use the suction mud mechanism to pump the slurry out of the suction barrel.

[0020] The present invention can remove the soil blocked in the suction cylinder during the process of the suction cylinder penetrating into the soil, achieving the effect of preventing soil plugging; when soil plugging occurs only in some of the suction cylinders, the sliding plate can be pushed by the blocked soil to open the diversion channel, realizing the deployment of high-pressure water, accelerating the removal of soil, and ensuring that all suction cylinders can smoothly penetrate into the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is the structural schematic diagram of the suction mud pipeline;

[0024] Figure 3 is the schematic diagram of the distribution mode of all suction cylinders;

[0025] Figure 4 is the schematic diagram of the setting mode of the pipeline inside the cylinder;

[0026] Figure 5 is the structural schematic diagram of the high-pressure water soil-breaking pipeline;

[0027] Figure 6 is the schematic diagram of the setting mode of each valve;

[0028] Figure 7 is the schematic diagram of the setting mode of the sliding plate;

[0029] Figure 8 is the schematic diagram of the setting mode of the pressure sensor;

[0030] Figure 9 is Figure 8 the partial enlarged view of

[0031] Reference numerals: 1 - suction cylinder, 2 - tower barrel, 3 - liquid outlet at the top of the cylinder, 4 - liquid injection pipeline, 5 - main high-pressure water soil-breaking pipe, 6 - high-pressure water soil-breaking branch pipe, 7 - high-pressure pump, 8 - inlet valve, 9 - pressure sensor, 10 - pipeline inside the cylinder, 11 - mud pump, 12 - mud pumping valve, 13 - branch of the suction mud pipeline, 14 - main suction mud pipeline, 15 - slurry outlet valve, 16 - flow meter, 17 - slurry outlet pipeline, 18 - cylinder body plate, 19 - floating plate, 20 - sliding plate, 21 - gasket, 22 - connecting shaft, 23 - follower rod, 24 - diversion channel, 25 - jack, 26 - distance sensor. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0033] As Figures 1 to 9 shown, a soil plug prevention structure for a polygonal suction bucket penetrating into soil includes a tower barrel 2 and a plurality of suction buckets 1, and further includes a high-pressure water soil-breaking mechanism and a mud suction mechanism. The high-pressure water soil-breaking mechanism is used to input high-pressure water for scouring the blocked soil into the suction bucket 1, and the mud suction mechanism is used to suck the mud lifted by the high-pressure water from the suction bucket 1.

[0034] Two adjacent suction buckets 1 both have a common barrel plate 18. A diversion channel 24 extending along the moving direction of the suction bucket 1 is formed in the barrel plate 18. A connecting shaft 22 is slidably arranged in the diversion channel 24. Two sliding plates 20 are fixedly connected to both ends of the connecting shaft 22 respectively. The diversion channel 24 can be opened or closed during the sliding process of the sliding plates 20.

[0035] The high-pressure water soil-breaking mechanism includes a plurality of inner-barrel pipes 10 correspondingly arranged in the suction bucket 1. The inner-barrel pipes 10 are annular and fixedly arranged on the inner wall of the upper end of the suction bucket 1. A plurality of high-pressure water outlets are formed in the inner-barrel pipes 10.

[0036] In the present invention, during the process of the suction cylinder penetrating into the soil, seabed soil will enter the suction cylinder 1. When the suction cylinder 1 forms a soil plug due to excessive soil entering, high-pressure water is introduced into the suction cylinder 1 by the high-pressure water soil-breaking mechanism. The high-pressure water flushes the soil away to form a gushing slurry, and then the slurry is pumped away by the slurry suction mechanism, thus solving the problem of the soil plug and preventing the suction cylinder 1 from being blocked. Considering that the soil plug conditions in different suction cylinders 1 are not necessarily the same, there may be a situation where some suction cylinders 1 have soil plugs while the other suction cylinders 1 are normal. At this time, as the suction cylinder 1 continues to move downward, the height of the soil in the suction cylinder 1 with a soil plug will increase, thereby pushing the sliding plate 20 upward. When the sliding plate 20 moves to open the diversion channel 24, two adjacent suction cylinders 1 are connected through the diversion channel 24. Part of the high-pressure water in the suction cylinder 1 without a soil plug can enter the suction cylinder 1 with a soil plug through the diversion channel 24, so as to jointly flush away the blocked soil and improve the efficiency of soil cleaning. If both of the two adjacent suction cylinders 1 have soil plugs, then even if the sliding plate 20 moves upward, the diversion channel 24 will still be blocked by the soil on both sides, and the two suction cylinders 1 will not communicate with each other. The high-pressure water will not pass through the diversion channel 24, and the two suction cylinders 1 independently clean the soil, which can prevent the loss of high-pressure water in one of the suction cylinders 1 and cause the inability to smoothly remove the blocked soil. After the blocked soil is removed, the sliding plate 20 moves downward and resets under the dual action of gravity and high-pressure water.

[0037] The present invention can remove the soil blocked in the suction cylinder 1 during the process of the suction cylinder 1 penetrating into the soil, achieving the effect of preventing soil plugs; when only some of the suction cylinders 1 have soil plugs, the sliding plate 20 can be pushed by the blocked soil to open the diversion channel 24, realizing the allocation of high-pressure water, accelerating the removal of soil, and ensuring that all suction cylinders 1 can smoothly penetrate into the soil.

[0038] The specific structure of the high-pressure water soil-breaking mechanism is as follows: The high-pressure water soil-breaking mechanism includes an annular high-pressure water soil-breaking main pipe 5. The high-pressure water soil-breaking main pipe 5 is connected to a liquid injection pipe 4 and a plurality of high-pressure water soil-breaking branch pipes 6. And the connection positions of all the high-pressure water soil-breaking branch pipes 6 with the high-pressure water soil-breaking main pipe 5 are evenly distributed on the high-pressure water soil-breaking main pipe 5. The high-pressure water soil-breaking branch pipes 6 are correspondingly connected to the inner cylinder pipes 10.

[0039] A high-pressure water breaking main pipe 5 is provided with a high-pressure pump 7, and a high-pressure water breaking branch pipe 6 is provided with a water inlet valve 8 and a pressure sensor 9. Through this setting, the high-pressure water transported by the liquid injection pipeline 4 to the high-pressure water breaking main pipe 5 can be evenly distributed to all the high-pressure water breaking branch pipes 6, ensuring that the high-pressure water can evenly enter the barrel inner pipeline 10 through the high-pressure water breaking branch pipes 6, and further making the high-pressure water volume in each suction barrel 1 uniform, avoiding the decline in the stability of the suction barrel 1 and the weakening of the effect of scouring the soil due to the uneven high-pressure water volume in different suction barrels 1. In order to accurately control the high-pressure water and ensure the effect of preventing soil plugging, the high-pressure pump 7 is set as a multi-stage centrifugal pump, and the appropriate water pumping force can be selected according to actual needs.

[0040] The specific structure of the mud pumping mechanism is as follows: The mud pumping mechanism includes a plurality of mud pumping pipeline branch pipes 13, the mud pumping pipeline branch pipes 13 correspondingly extend into the suction barrel 1, the mud pumping pipeline branch pipes 13 are provided with slurry pumping valves 12 and flow meters 16, all the mud pumping pipeline branch pipes 13 are commonly connected to a mud pumping pipeline main pipe 14, the mud pumping pipeline main pipe 14 is provided with a mud pump 11, and the mud pumping pipeline main pipe 14 is also connected to a slurry discharge pipeline 17, and a slurry discharge valve 15 is further provided on the slurry discharge pipeline 17. After the high-pressure water scours the soil in the suction barrel 1 to form mud, the slurry discharge valve 15 and the slurry pumping valve 12 are opened, and the mud pump 11 is used to pump the mud out of the suction barrel 1 through the mud pumping pipeline branch pipes 13 and the mud pumping pipeline main pipe 14. The flow meter 16 can monitor the mud volume pumped out of each suction barrel 1 to fully understand the soil plugging situation of the suction barrel 1.

[0041] In order to ensure the effect of preventing soil plugging, a sufficient amount of high-pressure water needs to be input into the suction barrel 1. When the amount of high-pressure water is too large, it needs to be discharged in time to avoid the high-pressure water in the suction barrel 1 from hindering the movement of the suction barrel 1. To avoid this situation, a barrel top liquid outlet 3 is opened at the top of the suction barrel 1, and the barrel top liquid outlet 3 is used to discharge the excessive high-pressure water to ensure that the suction barrel 1 can continue to move downward smoothly.

[0042] In order to further ensure that the soil entering the suction barrel 1 can smoothly push the sliding plate 20 upward, a floating plate 19 perpendicular to the sliding plate 20 is fixedly connected to the bottom of the sliding plate 20, and the floating plate 19 extends towards the middle of the suction barrel 1. By setting the floating plate 19 and the floating plate 19 being perpendicular to the sliding plate 20, the soil can directly contact the floating plate 19, thereby pushing the floating plate 19 and the sliding plate 20 upward simultaneously.

[0043] In order to more accurately understand the soil plug situation inside the suction cylinder 1, the diversion channel 24 is connected to an upwardly extending jack 25. A distance sensor 26 is fixedly arranged in the jack 25. The connecting shaft 22 is fixedly connected with a follower rod 23, and the follower rod 23 extends upward into the jack 25. When the soil inside the suction cylinder 1 pushes the sliding plate 20 to move upward, the sliding plate 20 and the connecting shaft 22 move upward synchronously. The connecting shaft 22 then pushes the follower rod 23 to move upward and enter the jack 25. The distance sensor 26 can sense the position of the follower rod 23 in real time, and then judge whether the sliding plate 20 moves upward according to the position of the follower rod 23, so as to achieve the purpose of judging whether there is a soil plug inside the suction cylinder 1. The sliding plate 20 and the end of the connecting shaft 22 are fixedly connected by bolts, and a counterbore for accommodating the bolt head is arranged on the sliding plate 20, and a sealing gasket 21 is arranged in the counterbore to protect the bolts.

[0044] As Figure 4 shown, in this embodiment, seven suction cylinders 1 are provided. One suction cylinder 1 is located below the tower barrel 2 and is marked as 1#, and the end face of the 1# suction cylinder 1 is a regular hexagon. The remaining six suction cylinders 1 are evenly distributed around the circumferential direction of the tower barrel 2 and are marked as 2-7#, and the end faces of these suction cylinders 1 are regular pentagons. All the suction cylinders 1 are fixedly connected together to form a polygonal suction cylinder mechanism. In each suction cylinder 1, the inner cylinder pipeline 10 is all wound around the top end of the inner wall of the suction cylinder 1.

[0045] More specifically, the diameter of the liquid injection pipeline 4 and the high-pressure water soil-breaking branch pipe 6 is 0.15 - 0.25 m; the diameter of the high-pressure water soil-breaking main pipe 5 is 0.45 - 0.5 m; there are a total of seven inner cylinder pipelines 10, with a diameter of 0.15 - 0.25 m, and the diameter of the liquid outlet at the top of the cylinder is 0.005 - 0.008 m; the diameter of the sludge suction and slurry pipeline branch 13 is 0.2 - 0.3 m, and the diameter of the sludge suction and slurry pipeline main 14 is 0.50 - 0.60 m; the diameter of the slurry outlet pipeline 17 is 0.30 - 0.40 m; the inlet valve 8 is a gate valve with a diameter of 0.2 m; the slurry extraction valve 12 is a check valve with a diameter of 0.3 m; the slurry outlet valve 15 is a diaphragm valve with a diameter of 0.3 m; the high-pressure injection water pump 7 is a multistage centrifugal pump with a pressure of 0 - 2.0 Mpa and a flow rate of 60 - 100 m3 / h, with a body size of 0.6 - 0.8 m in length, 0.4 - 0.5 m in width, and 0.2 - 0.4 m in height; the slurry pump 11 is a slurry pump with a head of 0 - 60 m, a flow rate of 40 - 80 m3 / h, 0.6 - 0.8 m in length, 0.4 - 0.5 m in width, and 0 - 0.4 m in height.

[0046] A construction method for driving a polygonal suction bucket into the soil, based on the above-mentioned anti-soil plugging structure for driving a polygonal suction bucket into the soil. Before performing the soil breaking and slurry discharging operations, it is first necessary to check the status of all equipment to ensure that the device can operate normally. Focus on checking the high-pressure pump 7, slurry pump 11, each valve, each pipeline, pressure sensor 9 and flowmeter 10 to ensure that the water injection and slurry suction pipelines are unblocked, the hydraulic system has no leakage, and the electrical control system operates normally. Only after the inspection can the operation be started. The construction method includes S1 to S3.

[0047] S1. Drive the tower barrel 2 and the suction bucket 1 to move downward into the seawater. Specifically, during the downward movement of the suction bucket 1, it is necessary to close each slurry suction pipeline to ensure that the device is in the soil breaking mode.

[0048] S2. When the soil enters the suction bucket 1 and causes blockage, use the high-pressure water soil breaking mechanism to input high-pressure water into the suction bucket 1 to wash up the soil to form slurry. Specifically, open the high-pressure water soil breaking main pipe 5 and the high-pressure water soil breaking branch pipe 6, start the high-pressure pump 7 and the water inlet valve 8 corresponding to the suction bucket 1 to input seawater into the suction bucket 1, and then open the overflow valve on the top liquid outlet 3 of the barrel to ensure the smoothness of the high-pressure water pipeline, so that seawater can be discharged smoothly during high-pressure water injection to avoid blockage. After that, the seawater enters the inner pipe 10 of the barrel through the high-pressure water soil breaking main pipe 5 and the high-pressure water soil breaking branch pipe 6 corresponding to the suction bucket 1, and the excess seawater is discharged through the top liquid outlet 3 of this compartment. Use the pressure sensor 9 to monitor and adjust the seawater flow rate in real time to ensure that the water flow pressure is adjusted according to the water flow resistance of different soils. The high-pressure water flow is evenly released in the inner pipe of the barrel to achieve the effect of breaking the soil of the suction bucket 1.

[0049] S3. Use the slurry suction mechanism to pump the slurry out of the suction bucket 1. After the soil breaking operation is completed, close the high-pressure water soil breaking main pipe 5 and the high-pressure water soil breaking branch pipe 6 to stop the seawater injection to prevent overpressure. Close the valve on the top liquid outlet 3 to ensure the sealing of the suction bucket 1, avoid seawater leakage and maintain the pressure balance of the system. Open the slurry suction pipeline to prepare for discharging the disturbed slurry. Start the slurry pump 11 and the slurry suction valve 12 corresponding to the respective compartments, so that the disturbed slurry can be smoothly discharged from the pipeline of the suction bucket 1 to the slurry suction system. During the whole process, it is necessary to continuously monitor the system pressure and the valve status to ensure the smoothness of the subsequent slurry discharging operation, prevent pipeline blockage or seawater leakage of the suction bucket 1, and ensure the smooth progress of the subsequent operation and the stable operation of the system. The slurry is pumped out by the slurry pump 11 and transported to the slurry suction pipeline main pipe 14 through the slurry suction pipeline branch pipe 13. The discharge rate of the slurry is monitored in real time through the flowmeter 16 to ensure that the flow rate during the slurry discharge process is controlled. Finally, open the slurry discharge valve 15, and the slurry is smoothly discharged through the slurry discharge pipeline 17 to complete the whole slurry discharge process.

[0050] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A soil plugging structure in which a polygonal suction cylinder is penetrated into a soil body, comprising a tower (2) and a plurality of suction cylinders (1), characterized in that: It also includes a high-pressure water soil-breaking mechanism and a mud suction mechanism, wherein the high-pressure water soil-breaking mechanism is used to input high-pressure water into the suction cylinder (1) for flushing blocked soil, and the mud suction mechanism is used to suck mud flushed up by the high-pressure water from the suction cylinder (1); Two adjacent suction cylinders (1) have a common cylinder plate (18), the cylinder plate (18) is provided with a guide channel (24) extending along the moving direction of the suction cylinder (1), a connecting shaft (22) is slidably arranged in the guide channel (24), and a sliding plate (20) is fixedly connected to each of the two ends of the connecting shaft (22), and the sliding plate (20) can open or close the guide channel (24) during the sliding process; The high-pressure water earth-breaking mechanism comprises a plurality of inner tube pipes (10) correspondingly arranged in the suction tube (1), the inner tube pipe (10) being annular and fixedly arranged on the inner wall of the upper end of the suction tube (1), and the inner tube pipe (10) being provided with a plurality of high-pressure water outlets; The high-pressure water earth-breaking mechanism comprises an annular high-pressure water earth-breaking main pipe (5), the high-pressure water earth-breaking main pipe (5) being connected to a plurality of high-pressure water earth-breaking branch pipes (6), the high-pressure water earth-breaking branch pipes (6) being connected to the inner pipe (10) correspondingly; The high-pressure water ground-breaking main pipe (5) is provided with a high-pressure pump (7), and the high-pressure water ground-breaking branch pipe (6) is provided with a water inlet valve (8) and a pressure sensor (9); A floating plate (19) which is perpendicular to the sliding plate (20) is fixedly connected to the bottom of the sliding plate (20), and the floating plate (19) extends toward the middle of the suction cylinder (1).

2. A soil plug structure for a polygonal suction cylinder penetrating into a soil body as claimed in claim 1, characterized in that: The mud suction mechanism comprises a plurality of mud suction pipeline branches (13), the mud suction pipeline branches (13) correspondingly extending into the suction cylinder (1), the mud suction pipeline branches (13) being provided with a mud suction valve (12) and a flow meter (16), all the mud suction pipeline branches (13) being commonly connected to a mud suction pipeline main pipe (14), and the mud suction pipeline main pipe (14) being provided with a mud pump (11).

3. A soil plug structure in which a polygonal suction cylinder is penetrated into a soil body as claimed in claim 1, characterized in that: The top of the suction cylinder (1) is provided with a cylinder top liquid outlet (3).

4. A soil plugging structure for a polygonal suction cylinder penetrating into soil as claimed in claim 1, characterized in that: The guide channel (24) is connected to an upwardly extending plug hole (25), a distance sensor (26) is fixedly arranged in the plug hole (25), and the connecting shaft (22) is fixedly connected to a follower rod (23), and the follower rod (23) extends upward into the plug hole (25).

5. The soil plugging structure of a polygonal suction cylinder penetrating into soil as claimed in claim 1, characterized in that: One of the suction cylinders (1) is located below the tower (2), and the other suction cylinders (1) are evenly distributed in a circumferential direction around the tower (2).

6. A construction method for penetrating a polygonal suction cylinder into soil, based on a soil plug structure for penetrating a polygonal suction cylinder into soil as claimed in any one of claims 1 to 5, characterized in that: The method comprises the following steps: Driving the tower (2) and the suction cylinder (1) to move downward into the seawater; When soil enters the suction cylinder (1) and causes blockage, the high-pressure water soil-breaking mechanism is used to input high-pressure water into the suction cylinder (1) to flush the soil and form mud; The mud suction mechanism is used to extract the mud from the suction cylinder (1).

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