Grating device for monitoring and stabilizing sinking of offshore wind power barrel type foundation

Abstract

The invention relates to a grating device for sinking monitoring and stabilizing assisting of an offshore wind power barrel type foundation, the grating device comprises a grating body arranged in a bin dividing plate of the barrel type foundation, the grating body is provided with at least one spring, the lower end of the spring is fixedly arranged on the grating body, and the upper end of the spring abuts against the lower surface of a top plate of the barrel type foundation; a pressure sensor is arranged at the top of each spring; the upheaval deformation condition of a soil body in the barrel in the sinking process of the barrel type foundation can be effectively monitored through spring compression; the grating body can reduce the flow velocity of water flow at the position of a mud surface in a barrel during air and water pumping, plays a role in flow slowing, relieves the soil plug effect caused by upheaval of a soil body in the barrel type foundation, and plays a role in assisting the sinking stability of the barrel type foundation. The device is simple in structure, convenient to install, low in cost and high in practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of offshore wind power cylinder type foundation, and particularly relates to a grid device for monitoring sinking of offshore wind power cylinder type foundation and auxiliary stabilization. BACKGROUND

[0002] Offshore wind power cylinder type foundation is favored by the industry due to its low cost, fast construction, high overturning resistance and other advantages. It mainly utilizes the pressure difference generated by air and water pumping from the cylinder to sink to the predetermined depth under negative pressure. Compared with traditional driven piles or drilled piles, it has significant technical and economic advantages.

[0003] The negative pressure sinking control of the cylinder type foundation is the key and difficult point of its construction technology. At present, in the sinking construction process of the cylinder type foundation, the inclination angle in the sinking process of the cylinder is monitored through the sensor on the top cover of the foundation, and then the cylinder posture is corrected by adjusting the negative pressure. The internal soil deformation of the cylinder type foundation is not effectively monitored. In the sinking and installation process of the cylinder type foundation, the cylinder is pressed into the mud under the action of negative pressure, and the soil is easily extruded in the cylinder to form a soil plug effect, which affects the sinking of the cylinder type foundation.

[0004] Patent (CN201710664826.1) discloses a device for improving the floating water seal and negative pressure sinking stability of the cylinder type foundation, which increases the hydraulic gradient of soil pore water through the combined water blocking of lead weight and water permeation layer, and ensures the integrity of the soil of the cylinder type foundation during the negative pressure process. This structure can control the deformation of the soil in the cylinder during the sinking process of the cylinder type foundation to a certain extent, and avoid piping, but it has no effect on the soil plug effect.

[0005] Patent (CN220550584U) discloses an offshore wind power cylinder type foundation capable of reducing soil plug, which can slow down the water flow velocity during the water pumping and negative pressure process, and reduce the soil plug phenomenon. However, the grid plate is installed inside the top of the cylinder type foundation, and the deformation of the soil in the cylinder cannot be monitored. SUMMARY

[0006] To solve the above problems, the present application provides a grid device for monitoring sinking of offshore wind power cylinder type foundation and auxiliary stabilization, which can effectively monitor the deformation of the soil in the cylinder during the sinking process of the cylinder type foundation, reduce the water flow velocity of the mud surface position in the cylinder during air pumping and water pumping, play a flow slowing effect, and reduce the soil plug effect caused by the soil deformation in the cylinder type foundation, and play a role in auxiliary sinking stability of the cylinder type foundation.

[0007] The technical scheme adopted by the present application is: a grid device for monitoring sinking of a marine wind power cylinder type foundation and auxiliary stabilization, characterized by comprising a grid body arranged in a warehouse plate of the cylinder type foundation, at least one spring is arranged on the grid body, the lower end of the spring is fixedly arranged on the grid body, and the upper end of the spring abuts against the lower surface of a top plate of the cylinder type foundation; the initial length of the spring is the distance between the top plate of the cylinder type foundation and the bottom surface of the cylinder type foundation; the initial position of the grid body is flush with the bottom surface of the cylinder type foundation; and a pressure sensor is arranged on the top of each spring.

[0008] As preferred, the grid body is shaped according to the internal section of the warehouse plate of the cylinder type foundation.

[0009] As preferred, the grid body is fan-shaped or circular, the grid body located in the internal part of the warehouse plate of the cylinder type foundation is circular, and the grid body located in the internal part of the warehouse plate around the cylinder type foundation is fan-shaped.

[0010] As preferred, four springs are arranged on each grid body and are arranged at four corners of the grid body.

[0011] As preferred, the grid body is made of stainless steel.

[0012] As preferred, the four corners of each grid body in contact with the cylinder wall and the warehouse plate are wrapped with rubber gaskets.

[0013] The present application has the following beneficial effects: the spring compression can effectively monitor the uplift deformation of the soil in the cylinder during the sinking process of the cylinder type foundation; the grid body can reduce the flow velocity of the water flow at the mud surface in the cylinder during the air and water pumping, plays a slow flow role, and reduces the soil plug effect caused by the uplift of the soil in the cylinder type foundation, plays a role of auxiliary sinking stability of the cylinder type foundation; the grid body is wrapped with rubber gaskets around the four corners and is in contact with the cylinder wall and the warehouse plate, can play a supporting role, enhances the stability of the cylinder wall and the warehouse plate, and prevents the cylinder wall and the warehouse plate from buckling during transportation and sinking. The present application has the advantages of simple structure, convenient installation, low cost and strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structure diagram of the grid device installed in the cylinder type foundation of the present application; Figure 2 The bottom view of the present application; Figure 1 Figure 3 The structure diagram of the fan-shaped grid body; Figure 4 The structure diagram of the circular grid body; ​Among them: 1. Grille body; 2. Spring; 3. Pressure sensor; 4. Negative pressure air and water extraction port; 5. Cylindrical foundation; 51. Cylindrical foundation wall; 52. Cylindrical foundation top plate; 53. Cylindrical foundation compartment plate; 54. Cylindrical foundation steel diagonal brace; 55. Cylindrical foundation column; 6. Rubber gasket. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0016] like Figures 1-2 As shown, the present invention provides a grid device for monitoring the sinking of an offshore wind power cylindrical foundation and assisting in stabilizing the same, comprising a grid body 1 arranged in a compartment plate of the cylindrical foundation, at least one spring 2 being provided on the grid body 1, the lower end of the spring 2 being fixedly provided on the grid body 1, and the upper end being against the lower surface of the top plate of the cylindrical foundation 5; the initial length of the spring 2 being the distance between the top plate of the cylindrical foundation 5 and the bottom surface of the cylindrical foundation 5; the initial position of the grid body 1 being flush with the bottom surface of the cylindrical foundation 5; and a pressure sensor 3 being provided on the top of each spring 2.

[0017] The pressure sensor 3 is installed on the top plate of the barrel foundation 5 and connected to the upper part of the spring 2. It can monitor the pressure of the transmission spring 2 when it is compressed. During the negative pressure sinking process of the barrel foundation 5, the grid body 1 is displaced upward with the squeezing of the soil, causing the spring 2 to compress. The deformation pressure of the spring 2 is monitored by the pressure sensor 3, and the deformation of the spring 2 is obtained according to Hooke's law. The uplift and deformation of the soil in the barrel foundation 5 are monitored, providing a basis for correcting the deviation of the barrel foundation 5 during the sinking process.

[0018] At the same time, during the sinking process of the cylindrical foundation 5, the grid body 1 can slow down the water flow rate on the mud surface during the negative pressure of pumping, and reduce the soil plug effect caused by the squeezing and bulging of the soil inside the cylindrical foundation 5 by cutting the soil, thereby playing a role in assisting the sinking stability of the cylindrical foundation 5. The grid body 1 is in contact with the cylinder wall and the partition plate by wrapping the rubber gasket 6 on all sides, which can play a supporting role, enhance the stability of the cylinder wall and the partition plate, and prevent the cylinder wall and the partition plate from buckling during transportation and sinking. The present invention has a simple structure, is easy to install, and has a low cost, accounting for about 1% of the overall material cost, and has strong practicality.

[0019] In this embodiment, the grid body 1 is shaped like the internal cross-section of the partition plate of the cylindrical foundation 5 .

[0020] Combine Figure 2As shown, the grid body 1 is fan-shaped or circular, the grid body 1 inside the partial warehouse plate in the cylindrical foundation 4 is circular, and the grid body 1 inside the partial warehouse plate around the cylindrical foundation 5 is fan-shaped.

[0021] In combination Figures 3-4 As shown, each grid body 1 is provided with four springs 2, which are arranged at four corners of the grid body 1; the spring 2 with a certain rigidity is selected to prevent elastic lateral deformation, and the elastic coefficient is small to reduce the sinking resistance of the cylindrical foundation 5, and the specific specifications and materials need to be optimized through model tests.

[0022] The grid body 1 is made of stainless steel; the four corners of each grid body 1 in contact with the cylinder wall and the partial warehouse plate are wrapped with rubber gaskets 6.

[0023] In the sinking process of the cylindrical foundation 5, the grid body 1 contacts the soil body with the bottom surface of the cylindrical foundation 5, and when the cylinder enters the soil body under negative pressure, the grid body 1 is extruded to the top of the cylinder with the soil body, and the inclination angle of the grid body 1 is basically consistent with the surface of the soil body in the cylinder. With the displacement of the grid body 1, the spring 2 at the four corners of the grid body 1 is compressed and deformed, the pressure sensor 3 at the top of the spring 2 can monitor the pressure of the spring 2 in real time, the deformation of the spring 2 can be calculated through Hooke's law, and the calculation formula is F = k × x , F is the pressure, k is the elastic coefficient of the spring 2, x is the deformation of the spring 2, and the soil body uplift deformation in the cylinder can be monitored, thereby providing data support for the sinking and deviation correction of the cylindrical foundation. In the sinking process of the cylindrical foundation 5, the grid body 1 is extruded by the spring 2 and contacts the surface of the soil body in the cylinder, the grid structure of the grid body 1 can slow down the flow velocity of the water flow at the mud surface position in the cylinder when the negative pressure is pumped, and the grid body 1 cuts the top surface of the soil body, which can reduce the soil plug effect caused by the uplift of the soil body in the cylindrical foundation 5, thereby playing a role in assisting the sinking stability of the cylindrical foundation 5. The grid body 1 supports the cylinder wall and the partial warehouse plate, thereby reducing the buckling of the cylinder wall and the partial warehouse plate in the transportation and sinking process.

[0024] Here, it should be noted that the description of the above technical solutions is exemplary, and the present specification can be embodied in different forms, and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the present disclosure thorough and complete, and will fully convey the scope disclosed by the present specification to those skilled in the art. In addition, the technical solutions of the present application are limited by the scope of the claims.

[0025] Finally, it should be pointed out that the above embodiments are only representative examples of the present application. Obviously, the present application is not limited to the above embodiments, and can have many variations. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application should be considered to be within the protection scope of the present application.

Claims

1. A grid device for monitoring and stabilizing the sinking of an offshore wind turbine cylinder foundation, characterized by: It includes a grille body arranged in the cylindrical foundation partition plate, and at least one spring is provided on the grille body. The lower end of the spring is fixedly arranged on the grille body, and the upper end rests on the lower surface of the cylindrical foundation top plate; the initial length of the spring is the distance between the cylindrical foundation top plate and the cylindrical foundation bottom surface; the initial position of the grille body is flush with the cylindrical foundation bottom surface; a pressure sensor is provided on the top of each spring.

2. The grid device for monitoring and stabilizing the sinking of an offshore wind turbine cylinder foundation according to claim 1 is characterized in that: The grille body is shaped like the inner cross section of the cylindrical basic partition plate.

3. The grid device for monitoring and stabilizing the sinking of an offshore wind turbine cylinder foundation according to claim 2 is characterized in that: The grille body is fan-shaped or circular. The grille body located inside the compartment plate in the middle of the barrel-type foundation is circular, and the grille body located inside the compartment plates around the barrel-type foundation is fan-shaped.

4. The grid device for monitoring and stabilizing the sinking of an offshore wind turbine cylindrical foundation according to claim 1 is characterized in that: Each of the grille bodies is provided with four springs, which are respectively arranged at the four corners of the grille body.

5. The grid device for monitoring and stabilizing the sinking of an offshore wind turbine cylindrical foundation according to claim 1 is characterized in that: The grille body is made of stainless steel.

6. The grid device for monitoring and stabilizing the sinking of an offshore wind turbine cylindrical foundation according to claim 1 is characterized in that: Each grid body is wrapped with a rubber gasket on all sides where it contacts the cylinder wall and the compartment plate.

Images