Soil blockage prevention structure for polygonal suction barrel penetrating into soil body and construction method of soil blockage prevention structure

Abstract

A soil blockage prevention structure for polygonal suction barrels penetrating into a soil body comprises a tower barrel and a plurality of suction barrels and further comprises a high-pressure water soil breaking mechanism and a slurry suction mechanism, and the high-pressure water soil breaking mechanism is used for inputting high-pressure water used for scouring blocked soil into the suction barrels; the slurry suction mechanism is used for sucking slurry flushed up by high-pressure water from the suction barrel; every two adjacent suction barrels are provided with a public barrel plate, a flow guide channel extending in the moving direction of the suction barrels is formed in each barrel plate, a connecting shaft is arranged in each flow guide channel in a sliding mode, and the two ends of each connecting shaft are each fixedly connected with a sliding plate; the flow guide channel can be opened or closed in the sliding process of the sliding plate. According to the soil blockage prevention structure for the polygonal suction barrel penetrating into the soil body and the construction method of the soil blockage prevention structure, soil blocked in the suction barrel can be removed in the process that the suction barrel penetrates into the soil body, and the soil blockage prevention effect is achieved.

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 earth-breaking mechanism comprises a plurality of inner tube pipes correspondingly arranged in the suction tube, the inner tube pipes are annular and fixedly arranged on the inner wall of the upper end of the suction tube, and the inner tube pipes are provided with a plurality of high-pressure water outlets.

[0009] Preferably, the high-pressure water earth-breaking mechanism comprises an annular high-pressure water earth-breaking main pipe, the high-pressure water earth-breaking main pipe is connected to a plurality of high-pressure water earth-breaking branch pipes, and the high-pressure water earth-breaking branch pipes are correspondingly connected to the pipes in the cylinder.

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

[0011] Preferably, the mud suction mechanism comprises a plurality of mud suction pipeline branches, the mud suction pipeline branches extend into the suction cylinder respectively, the mud suction pipeline branches are provided with slurry suction valves and flow meters, all the mud suction pipeline branches are commonly connected to a mud suction pipeline main pipe, and a mud pump is provided on the mud suction pipeline main pipe.

[0012] Preferably, a top liquid outlet is provided at the top of the suction cylinder.

[0013] Preferably, a floating plate which is perpendicular to the sliding plate is fixedly connected to the bottom of the sliding plate, and the floating plate extends toward the middle of the suction cylinder.

[0014] Preferably, the guide channel is connected to an upwardly extending socket, a distance sensor is fixedly arranged in the socket, and the connecting shaft is fixedly connected to a follower rod, and the follower rod extends upward into the socket.

[0015] Preferably, one of the suction cylinders is located below the tower, and the other suction cylinders are evenly distributed around the circumference of the tower.

[0016] A construction method for penetrating a polygonal suction cylinder into a soil body, based on the above-mentioned soil plugging structure of a polygonal suction cylinder penetrating into a soil body, the method comprises the following steps:

[0017] Driving the tower and the suction cylinder to move downward into the seawater;

[0018] When soil enters the suction cylinder and causes blockage, the high-pressure water breaking mechanism is used to input high-pressure water into the suction cylinder to flush the soil to form mud;

[0019] The mud suction mechanism is used to extract the mud from the suction cylinder.

[0020] The present invention 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 preventing soil plugging; when soil plugging appears in only part of the suction cylinders, the sliding plate can be pushed by the blocked soil to open the diversion channel, thereby achieving 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 embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the suction mud pipeline;

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

[0025] Figure 4 It is a schematic diagram of the arrangement of the pipes in the cylinder;

[0026] Figure 5 It is a schematic diagram of the structure of a high-pressure water ground-breaking pipeline;

[0027] Figure 6 It is a schematic diagram of the setting method of each valve;

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

[0029] Figure 8 is a schematic diagram of the pressure sensor and its setting method;

[0030] Fig. 9 yes Figure 8 A partial enlarged view of .

[0031] Figure markings: 1-suction cylinder, 2-tower, 3-liquid outlet on cylinder top, 4-liquid injection pipeline, 5-high-pressure water breaking ground main pipe, 6-high-pressure water breaking ground branch pipe, 7-high-pressure pump, 8-water inlet valve, 9-pressure sensor, 10-pipeline in cylinder, 11-mud pump, 12-slurry suction valve, 13-mud suction pipeline branch pipe, 14-mud suction pipeline main pipe, 15-slurry discharge valve, 16-flow meter, 17-slurry discharge pipeline, 18-cylinder plate, 19-floating plate, 20-sliding plate, 21-sealing pad, 22-connecting shaft, 23-follow-up rod, 24-diversion channel, 25-jack, 26-distance sensor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 9 As shown, a polygonal suction cylinder is penetrated into the soil to prevent soil plugging structure, including a tower 2 and multiple suction cylinders 1, and also 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 into the suction cylinder 1 for flushing the blocked soil, and the mud suction mechanism is used to suck the mud flushed by the high-pressure water from the suction cylinder 1.

[0034] Two adjacent suction cylinders 1 have a common cylinder plate 18, on which a guide channel 24 extending along the moving direction of the suction cylinder 1 is provided, and a connecting shaft 22 is slidably arranged in the guide channel 24, and a sliding plate 20 is fixedly connected at each end of the connecting shaft 22, and the guide channel 24 can be opened or closed during the sliding process of the sliding plate 20.

[0035] 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 pipes 10 are annular and fixedly arranged on the inner wall of the upper end of the suction tube 1. The inner tube pipes 10 are provided with a plurality of high-pressure water outlets.

[0036] In the present invention, during the process of the suction cylinder penetrating the soil, the seabed soil will enter the suction cylinder 1. When the suction cylinder 1 is blocked by soil due to too much soil entering, the high-pressure water breaking mechanism is used to introduce high-pressure water into the suction cylinder 1, and the soil is flushed away by the high-pressure water to form upwelling mud, and then the mud suction mechanism is used to pump away the mud, so as to solve the problem of soil plugging and avoid the suction cylinder 1 being blocked. Considering that the soil plugging situation in different suction cylinders 1 is not certain, there may be a situation where some suction cylinders 1 are blocked, while the other suction cylinders 1 are normal. At this time, as the suction cylinder 1 continues to move downward, the soil height in the suction cylinder 1 with soil plugging will increase, and then the sliding plate 20 will be pushed upward. When the sliding plate 20 moves to open the diversion channel 24, the two adjacent suction cylinders 1 are connected through the diversion channel 24, and part of the high-pressure water in the suction cylinder 1 without soil plugging can enter the suction cylinder 1 with soil plugging through the diversion channel 24, so as to flush the blocked soil together and improve the efficiency of cleaning the soil. If soil blockage occurs in two adjacent suction cylinders 1, even if the sliding plate 20 moves upward, the diversion channel 24 will still be blocked by soil on both sides, the two suction cylinders 1 will not communicate with each other, and high-pressure water will not pass through the diversion channel 24. The two suction cylinders 1 can clean the soil independently, which can avoid the loss of high-pressure water in one of the suction cylinders 1 and the inability to remove the blocked soil smoothly. After the blocked soil is removed, the sliding plate 20 moves downward and resets under the dual effects 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, thereby achieving the effect of preventing soil blockage; when soil blockage occurs in only part of the suction cylinder 1, the sliding plate 20 can be pushed by the blocked soil to open the diversion channel 24, thereby achieving the deployment of high-pressure water, accelerating the removal of soil, and ensuring that all the suction cylinders 1 can smoothly penetrate into the soil.

[0038] The specific structure of the high-pressure water earth-breaking mechanism is as follows: the high-pressure water earth-breaking mechanism includes an annular high-pressure water earth-breaking main pipe 5, the high-pressure water earth-breaking main pipe 5 is connected to an injection pipe 4 and multiple high-pressure water earth-breaking branch pipes 6, and the connecting positions of all high-pressure water earth-breaking branch pipes 6 and the high-pressure water earth-breaking main pipe 5 are evenly distributed on the high-pressure water earth-breaking main pipe 5, and the pressure water earth-breaking branch pipes 6 are correspondingly connected to the pipe 10 in the cylinder.

[0039] A high-pressure pump 7 is provided on the high-pressure water ground-breaking main pipe 5, and a water inlet valve 8 and a pressure sensor 9 are provided on the high-pressure water ground-breaking branch pipe 6. Through this arrangement, the high-pressure water transported to the high-pressure water ground-breaking main pipe 5 by the injection pipe 4 can be evenly distributed to all the high-pressure water ground-breaking branch pipes 6, ensuring that the high-pressure water can evenly enter the inner pipe 10 through the high-pressure water ground-breaking branch pipe 6, thereby making the amount of high-pressure water in each suction cylinder 1 uniform, avoiding the imbalance of high-pressure water in different suction cylinders 1, resulting in a decrease in the stability of the suction cylinder 1 and a weakening of the effect of flushing the soil. In order to control the high-pressure water with high precision and ensure the effect of soil plugging, the high-pressure pump 7 is set as a multi-stage centrifugal pump, and the appropriate pumping force can be selected according to actual needs.

[0040] The specific structure of the mud suction mechanism is as follows: the mud suction mechanism includes a plurality of mud suction pipeline branches 13, the mud suction pipeline branches 13 extend into the suction cylinder 1 correspondingly, the mud suction pipeline branches 13 are provided with a slurry suction valve 12 and a flow meter 16, all the mud suction pipeline branches 13 are connected to a mud suction pipeline main 14, the mud suction pipeline main 14 is provided with a mud pump 11, and the mud suction pipeline main 14 is also connected to a slurry outlet pipeline 17, and a slurry outlet valve 15 is also provided on the slurry outlet pipeline 17. After the high-pressure water flushes the soil in the suction cylinder 1 to form mud, the slurry outlet valve 15 and the slurry suction valve 12 are opened, and the mud pump 11 is used to extract the mud from the suction cylinder 1 through the mud suction pipeline branches 13 and the mud suction pipeline main 14. The flow meter 16 can monitor the amount of mud extracted from each suction cylinder 1 to fully understand the soil plugging situation of the suction cylinder 1.

[0041] In order to ensure the effect of the soil plug, a sufficient amount of high-pressure water needs to be input into the suction cylinder 1. When the amount of high-pressure water is too large, it needs to be released in time to prevent the high-pressure water in the suction cylinder 1 from hindering the movement of the suction cylinder 1. In order to avoid this situation, a top liquid outlet 3 is opened on the top of the suction cylinder 1. The top liquid outlet 3 is used to discharge excess high-pressure water to ensure that the suction cylinder 1 can continue to move downward smoothly.

[0042] In order to further ensure that the soil entering the suction cylinder 1 can smoothly push the sliding plate 20 to move 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 to the middle of the suction cylinder 1. By providing the floating plate 19, and the floating plate 19 and the sliding plate 20 being perpendicular to each other, the soil can directly contact the floating plate 19, thereby pushing the floating plate 19 and the sliding plate 20 to move upward at the same time.

[0043] In order to more accurately understand the soil plugging situation in the suction cylinder 1, the diversion channel 24 is connected to an upwardly extending socket 25, in which a distance sensor 26 is fixedly arranged, and a follower rod 23 is fixedly connected to the connecting shaft 22, and the follower rod 23 extends upward into the socket 25. When the soil in the suction cylinder 1 pushes the sliding plate 20 upward, the sliding plate 20 and the connecting shaft 22 move upward synchronously, and the connecting shaft 22 pushes the follower rod 23 upward and enters the socket 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, thereby achieving the purpose of judging whether there is soil plugging in the suction cylinder 1. The sliding plate 20 and the end of the connecting shaft 22 are fixedly connected by bolts, and a countersunk hole for accommodating the bolt head is provided on the sliding plate 20, and a sealing gasket 21 is provided in the countersunk hole to protect the bolt.

[0044] like Figure 4 As shown, in this embodiment, there are seven suction cylinders 1, one of which is located below the tower 2 and is marked as 1#, the end face of the 1# suction cylinder 1 is a regular hexagon, and the remaining six suction cylinders 1 are evenly distributed around the circumference of the tower 2 and are marked as 2-7#, and the end faces of these suction cylinders 1 are regular pentagons, and all the suction cylinders 1 are fixedly connected as a whole to form a polygonal suction cylinder mechanism. In each suction cylinder 1, the inner pipe 10 surrounds the top of the inner wall of the suction cylinder 1.

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

[0046] A construction method for penetrating a polygonal suction cylinder into a soil body, based on the above-mentioned soil plugging structure of a polygonal suction cylinder penetrating a soil body, before breaking the soil and discharging slurry, firstly, it is necessary to check the status of all equipment to ensure that the device can operate normally, and focus on checking the high-pressure pump 7, the mud pump 11, each valve, each pipeline, the pressure sensor 9 and the flow meter 10, to ensure that the water injection and slurry extraction pipelines are not blocked, the hydraulic system has no leakage, and the electrical control system operates normally, and the operation can be started after the inspection is completed. The construction method includes S1 to S3.

[0047] S1, drive the tower 2 and the suction cylinder 1 to move downward into the seawater. Specifically, during the downward movement of the suction cylinder 1, each slurry extraction pipeline needs to be closed to ensure that the device is in the groundbreaking mode.

[0048] S2. When soil enters the suction cylinder 1 and causes blockage, high-pressure water is input into the suction cylinder 1 by using a high-pressure water breaking mechanism to flush the soil and form mud. Specifically, the high-pressure water breaking main pipe 5 and the high-pressure water breaking branch pipe 6 are opened, and the high-pressure pump 7 and the water inlet valve 8 corresponding to the suction cylinder 1 are started to input seawater into the suction cylinder 1, and then the overflow valve on the top liquid outlet 3 of the cylinder is opened to ensure that the high-pressure water pipeline is unobstructed, so that the seawater can be discharged smoothly during high-pressure water injection to avoid blockage. After that, the seawater enters the pipe 10 in the cylinder through the high-pressure water breaking main pipe 5 and the high-pressure water breaking branch pipe 6 corresponding to the suction cylinder 1, and the excess seawater is discharged through the top liquid outlet 3 of the tank. The seawater flow rate is monitored and adjusted in real time by using a pressure sensor 9 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 pipe in the cylinder to achieve the effect of breaking the soil of the suction cylinder 1.

[0049] S3. Use the mud suction mechanism to extract the mud from the suction cylinder 1. After the groundbreaking operation is completed, close the high-pressure water groundbreaking main pipe 5 and the high-pressure water groundbreaking branch pipe 6, stop the seawater injection, and prevent overpressure. Close the valve on the top outlet 3 to ensure that the suction cylinder 1 is sealed, avoid seawater leakage and maintain the pressure balance of the system. Open the mud suction pipeline to prepare for the discharge of disturbed mud. Start the mud pump 11 and the corresponding compartment suction valve 12, so that the disturbed mud can be smoothly discharged to the suction system through the suction cylinder 1 pipeline. During the whole process, it is necessary to continuously monitor the system pressure and valve status to ensure smooth and unobstructed subsequent mud discharge operations, prevent pipeline blockage or seawater leakage in the suction cylinder 1, and ensure the smooth progress of subsequent operations and stable operation of the system. The mud is extracted by the mud pump 11 and transported to the suction mud pipeline main pipe 14 via the suction mud pipeline branch pipe 13. The mud removal rate is monitored in real time by the flow meter 16 to ensure that the flow rate during the mud discharge process is controlled. Finally, the slurry discharge valve 15 is opened, and the slurry is discharged smoothly through the slurry discharge pipe 17, completing the entire slurry discharge process.

[0050] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may 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 to 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 inserted 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); The two adjacent suction cylinders (1) have a common cylinder plate (18), and a guide channel (24) extending along the moving direction of the suction cylinder (1) is provided on the cylinder plate (18). 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). The guide channel (24) can be opened or closed during the sliding process of the sliding plate (20).

2. A soil plug structure for a polygonal suction cylinder penetrating into a soil body as claimed in claim 1, characterized in that: 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) is annular and fixedly arranged on the inner wall of the upper end of the suction tube (1); and the inner tube pipe (10) is provided with a plurality of high-pressure water outlets.

3. A soil plug structure in which a polygonal suction cylinder is penetrated into a soil body as claimed in claim 2, characterized in that: 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) is connected to a plurality of high-pressure water earth-breaking branch pipes (6), and the high-pressure water earth-breaking branch pipes (6) are correspondingly connected to the inner tube pipe (10).

4. A soil plugging structure in which a polygonal suction cylinder is penetrated into a soil body as claimed in claim 3, characterized in that: The high-pressure water earth-breaking main pipe (5) is provided with a high-pressure pump (7), and the high-pressure water earth-breaking branch pipe (6) is provided with a water inlet valve (8) and a pressure sensor (9).

5. The soil plugging structure of a polygonal suction cylinder penetrating into soil 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).

6. A soil plugging structure in which a polygonal suction cylinder is inserted 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).

7. A soil plugging structure in which a polygonal suction cylinder is inserted into a soil body as claimed in claim 1, characterized in that: 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).

8. The soil plugging structure of 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).

9. 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).

10. A construction method for penetrating a polygonal suction cylinder into a soil body, based on a soil plug structure for penetrating a polygonal suction cylinder into a soil body as claimed in any one of claims 1 to 9, 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 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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