Offshore wind power steel pipe pile foundation

Abstract

The utility model relates to the technical field of offshore wind power steel pipe pile foundations, and discloses an offshore wind power steel pipe pile foundation which comprises a steel pipe pile, a plurality of triangular structures are evenly arranged on the steel pipe pile in the circumferential direction, the triangular structures are located below a mud surface line, and the horizontal extending edges of the triangular structures are flush with the mud surface line. A grouting reinforcing layer is poured on a mud surface soil layer in the steel pipe pile, a sealing plug is arranged at an upper end opening of the steel pipe pile, and a valve is arranged on the steel pipe pile and used for being connected with a vacuum pump system. The offshore wind power steel pipe pile foundation solves the problem that the bearing capacity of an existing steel pipe pile needs to be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power steel pipe pile foundations, in particular to an offshore wind power steel pipe pile foundation. Background Art

[0002] In the development of offshore wind farms, the foundation cost accounts for 20%-30%, and with the application of large-capacity wind turbines and the increase in water depth and offshore distance, the foundation cost ratio has further increased. At present, steel pipe pile foundation is the most widely used and most economical foundation form in my country.

[0003] Offshore wind power steel pipe pile foundation has a simple structure, convenient construction and low cost. As wind turbines become larger and deeper into the sea, the load on the foundation becomes greater and greater, requiring the diameter of the steel pipe pile foundation to become larger and larger. Currently, due to the limitations of the manufacturer's coiling process, the diameter of the steel pipe pile has reached its limit, resulting in a limited application range for this type of foundation. Utility Model Content

[0004] The utility model aims to provide an offshore wind power steel pipe pile foundation to solve at least one of the above problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An offshore wind power steel pipe pile foundation comprises a steel pipe pile, wherein a plurality of triangular structures are evenly arranged circumferentially on the steel pipe pile, wherein the triangular structures are located below the mud surface line and the horizontally extending sides of the triangular structures are flush with the mud surface line, a grouting reinforcement layer is poured on the internal mud surface soil layer of the steel pipe pile, a sealing plug is provided at the upper end of the steel pipe pile, and a valve is provided on the steel pipe pile, wherein the valve is used to be connected to a vacuum pump system.

[0007] In this technical solution, since a number of triangular structures are evenly arranged on the steel pipe piles, during construction, the steel pipe piles are installed in position according to the normal pile sinking construction process. The triangular structures interact with the soil around the piles, increasing the interaction area between the piles and the soil, and improving the horizontal bearing capacity of the piles at the mud surface, thereby saving the use of steel and increasing the application scenarios of steel pipe pile foundations. A grouting reinforcement layer is poured on the internal mud surface soil layer of the steel pipe pile. A sealing plug is provided at the upper end of the steel pipe pile to seal the inside of the steel pipe pile. A valve is provided on the steel pipe pile to connect with the vacuum pump system. A sealing plug of matching size is installed on the top of the steel pipe pile. At this time, the sealing plug is in a loose state. Then the vacuum pump system is connected to the valve to draw air from the inside of the steel pipe pile to form a vacuum state. As the negative pressure in the steel pipe pile increases, the sealing plug is gradually tightened until it meets the design requirements and the installation is completed. The soil is grouted inside the steel pipe pile, and a sealing plug is installed on the top of the pile to form a sealed state. The steel pipe pile and the soil inside the pile form a whole, which improves the vertical and horizontal bearing capacity of the steel pipe pile.

[0008] In summary, this technical solution can effectively improve the vertical and horizontal bearing capacity of steel pipe piles, improve the horizontal soil resistance around the steel pipe piles, and increase the integrity of the piles and the soil inside the piles, saving the amount of foundation steel, increasing the application scenarios of steel pipe pile foundations, and effectively reducing the cost of offshore wind power development and construction.

[0009] Furthermore, in order to improve the horizontal bearing capacity of the steel pipe pile, eight triangular structures are evenly arranged on the circumference of the steel pipe pile.

[0010] Furthermore, in order to facilitate the installation of the sealing plug, the sealing plug is a wedge-shaped plug.

[0011] The beneficial effects of the utility model are as follows: in the technical solution, since a plurality of triangular structures are evenly arranged circumferentially on the steel pipe piles, during construction, the steel pipe piles are installed in position according to the normal pile sinking construction process, and the triangular structures interact with the soil around the piles, thereby increasing the interaction area between the piles and the soil, and improving the horizontal bearing capacity of the piles at the mud surface, thereby saving the use of steel materials and increasing the application scenarios of steel pipe pile foundations. A grouting reinforcement layer is poured on the internal mud surface soil layer of the steel pipe pile. A sealing plug is provided at the upper end of the steel pipe pile to seal the inside of the steel pipe pile. A valve is provided on the steel pipe pile to connect with the vacuum pump system. A sealing plug of matching size is installed on the top of the steel pipe pile. At this time, the sealing plug is in a loose state. Then the vacuum pump system is connected to the valve to draw air from the inside of the steel pipe pile to form a vacuum state. As the negative pressure in the steel pipe pile increases, the sealing plug is gradually tightened until it meets the design requirements and the installation is completed. The soil is grouted inside the steel pipe pile, and a sealing plug is installed on the top of the pile to form a sealed state. The steel pipe pile and the soil inside the pile form a whole, which improves the vertical and horizontal bearing capacity of the steel pipe pile.

[0012] In summary, this technical solution can effectively improve the vertical and horizontal bearing capacity of steel pipe piles, improve the horizontal soil resistance around the steel pipe piles, and increase the integrity of the piles and the soil inside the piles, saving the amount of foundation steel, increasing the application scenarios of steel pipe pile foundations, and effectively reducing the cost of offshore wind power development and construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the utility model in the grouting state;

[0015] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the utility model in a vacuum state.

[0017] In the figure: steel pipe pile 1; triangular structure 2; mud surface line 3; grouting reinforcement layer 4; sealing plug 5; valve 6; vacuum pump system 7; grouting system 8. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0019] Embodiment 1:

[0020] like Figure 1-Figure 4 As shown, this embodiment provides an offshore wind power steel pipe pile foundation, including a steel pipe pile 1, a plurality of triangular structures 2 are evenly arranged circumferentially on the steel pipe pile 1, the triangular structure 2 is located below the mud surface line 3 and the horizontal extension edge of the triangular structure 2 is flush with the mud surface line 3, a grouting reinforcement layer 4 is poured on the internal mud surface soil layer of the steel pipe pile 1, a sealing plug 5 is provided at the upper end of the steel pipe pile 1, and a valve 6 is provided on the steel pipe pile 1, and the valve 6 is used to connect with a vacuum pump system 7.

[0021] In the present technical solution, since a plurality of triangular structures 2 are evenly arranged on the steel pipe pile 1 in a circumferential direction, during construction, the steel pipe pile 1 is installed in position according to the normal pile sinking construction process, and the triangular structure 2 interacts with the soil around the pile, thereby increasing the interaction area between the pile and the soil and improving the horizontal bearing capacity of the pile at the mud surface, thereby saving the use of steel materials and increasing the basic application scenarios of the steel pipe pile 1. A grouting reinforcement layer 4 is poured on the internal mud surface soil layer of the steel pipe pile 1. A sealing plug 5 is provided at the upper end of the steel pipe pile 1 to seal the inside of the steel pipe pile 1. A valve 6 is provided on the steel pipe pile 1. The valve 6 is used to connect with the vacuum pump system 7. The sealing plug 5 of matching size is installed on the top of the steel pipe pile 1. At this time, the sealing plug 5 is in a non-tightened state. Then the vacuum pump system 7 is connected to the valve 6 to draw the inside of the steel pipe pile 1 to form a vacuum state. As the negative pressure in the steel pipe pile 1 increases, the sealing plug 5 is gradually tightened until it meets the design requirements and the installation is completed. The soil grouting is performed inside the steel pipe pile 1, and the sealing plug 5 is installed on the top of the pile to form a sealed state. The steel pipe pile 1 and the soil in the pile form a whole, which improves the vertical and horizontal bearing capacity of the steel pipe pile 1.

[0022] In summary, this technical solution can effectively improve the vertical and horizontal bearing capacity of the steel pipe pile 1, improve the horizontal soil resistance of the soil around the steel pipe pile 1, and increase the integrity of the pile and the soil inside the pile body, saving the use of foundation steel, increasing the basic application scenarios of the steel pipe pile 1, and effectively reducing the cost of offshore wind power development and construction.

[0023] Embodiment 2:

[0024] This embodiment is optimized based on the above-mentioned embodiment 1.

[0025] In order to improve the horizontal bearing capacity of the steel pipe pile 1 , eight triangular structures 2 are evenly arranged circumferentially on the steel pipe pile 1 .

[0026] Embodiment 3:

[0027] This embodiment is optimized based on the above-mentioned embodiment 1.

[0028] In order to facilitate the installation of the sealing plug 5, the sealing plug 5 is a wedge-shaped plug.

[0029] The construction steps of this technical solution are as follows:

[0030] 1. Eight triangular structures 2 are installed at the mud surface line 3 around the steel pipe pile 1. A valve 6 is opened at the top of the steel pipe pile 1. The steel pipe pile 1 is installed to the position according to the normal pile sinking construction process. The triangular structure 2 interacts with the soil around the pile, increasing the interaction area between the pile and the soil, and improving the horizontal bearing capacity of the pile at the mud surface;

[0031] 2. Grouting the mud layer inside the steel pipe pile 1 through the onboard grouting system 8 to form a grouting reinforcement layer 4;

[0032] 3. Install a wedge plug of matching size onto the top of the steel pipe pile 1, where the wedge plug is in a loose state;

[0033] 4. Connect the vacuum pump system 7 to the valve 6 on the top of the steel pipe pile 1, and draw air from the inside of the steel pipe pile 1 to form a vacuum state. As the negative pressure inside the steel pipe pile 1 increases, the wedge plug is gradually tightened until the design requirements are met and the installation is completed. At this point, the steel pipe pile 1 and the soil inside the pile become a whole, effectively improving the vertical and horizontal bearing capacity of the steel pipe pile 1, saving the amount of foundation steel used, and increasing the basic application scenarios of the steel pipe pile 1.

[0034] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An offshore wind power steel pipe pile foundation, characterized in that: It comprises a steel pipe pile, on which a plurality of triangular structures are evenly arranged circumferentially, the triangular structures are located below the mud surface line and the horizontally extending sides of the triangular structures are flush with the mud surface line, a grouting reinforcement layer is poured on the internal mud surface layer of the steel pipe pile, a sealing plug is provided at the upper end of the steel pipe pile, and a valve is provided on the steel pipe pile, and the valve is used to connect with a vacuum pump system.

2. The offshore wind power steel pipe pile foundation according to claim 1, characterized in that: Eight triangular structures are evenly arranged circumferentially on the steel pipe pile.

3. The offshore wind power steel pipe pile foundation according to claim 1, characterized in that: The sealing plug is a wedge-shaped plug.

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