Single pile, tripod and suction pile combined fan foundation structure

Abstract

The invention discloses a single pile, tripod and suction pile combined fan foundation structure, the single pile, tripod and suction pile combined fan foundation structure comprises a central stand column and a lower support, an inclined strut is connected between the lower support and the central stand column, a connection reinforcing section is arranged between the inclined strut and the central stand column, the lower support is connected to the suction pile, and the lower support is connected to the suction pile. The suction piles are inserted into seabed soil, so that the central stand column is stably arranged on the seabed; steel pipe piles are inserted into the center stand column, one ends of the steel pipe piles are connected with fans, and the ends, away from the fans, of the steel pipe piles are inserted into seabed soil so that the fans can be stably arranged on the sea. According to the single pile, tripod and suction pile combined fan foundation structure, the tripod structure is stably placed on the seabed at the preset position through the lifting appliance, then all the suction piles penetrate into the soil body and reach the designed depth, it is guaranteed that the overall perpendicularity and levelness meet the design requirement, and the construction efficiency is improved. And the steel pipe pile is hoisted to penetrate through the center stand column till the bottom end to be inserted into seabed soil.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore wind power engineering, and in particular relates to a wind turbine foundation structure composed of a single pile, a tripod and a suction pile. Background Art

[0002] As the construction of offshore wind farms gradually advances into the deep sea, the capacity of single units gradually increases, the geological conditions become increasingly complex, and the environmental conditions become further severe. The loads and bending moments borne by the wind turbine foundations have increased significantly, all of which have put forward higher requirements on the resistance of the foundation structure.

[0003] Traditional offshore wind farms are not suitable for deepwater areas, complex geological conditions, and harsh environmental conditions. In addition, the requirements for steel materials and processing technology are gradually increasing. The diameter, wall thickness and overall weight of single pile foundations and jacket foundations are gradually increasing, and the construction cost is high.

[0004] Therefore, it is urgent to design a wind turbine foundation structure that is a combination of a single pile, a tripod, and a suction pile to solve the above-mentioned problem of deep sea wind farm construction. Summary of the invention

[0005] In order to solve the technical problems mentioned in the background technology that offshore wind farms are not suitable for deep water areas, more complex geological conditions, more severe environmental conditions, and the requirements for steel materials and processing technology are gradually increasing, a wind turbine foundation structure composed of a single pile, a tripod and a suction pile is provided to solve the problem of deep sea wind farm construction.

[0006] To achieve the above purpose, the specific technical scheme of the wind turbine foundation structure of the single pile, tripod and suction pile combination of the present invention is as follows: A wind turbine foundation structure composed of a single pile, a tripod and a suction pile comprises a central column and a lower support, wherein an oblique brace is connected between the lower support and the central column, a connection reinforcement section is provided between the oblique brace and the central column, the lower support is connected to the suction pile, and the suction pile is inserted into the seabed soil so that the central column is stably set on the seabed; a steel pipe pile is inserted into the central column, one end of the steel pipe pile is connected to the wind turbine, and the end of the steel pipe pile away from the wind turbine is inserted into the seabed soil so that the wind turbine is stably set on the sea.

[0007] Furthermore, the diagonal brace includes an upper diagonal brace and a lower diagonal brace, the upper diagonal brace and the lower diagonal brace are connected to the central column at intervals, and the upper diagonal brace and the lower diagonal brace are connected to the lower support at one end away from the central column.

[0008] Furthermore, an upper connection reinforcement section and a lower connection reinforcement section are connected to the central column at intervals, an upper diagonal brace is connected to the upper connection reinforcement section, and a lower diagonal brace is connected to the lower connection reinforcement section.

[0009] Furthermore, the central column is connected to three lower supports through upper diagonal supports and lower diagonal supports, and the three lower supports are arranged in an equilateral triangle.

[0010] Furthermore, the three lower supports are all connected to the suction piles, and the suction piles are inserted into the seabed soil at one end away from the lower support.

[0011] Furthermore, a lifting lug is connected to the lower support, and the lifting lug is lifted by a lifting tool so that the central column abuts against the seabed soil.

[0012] Furthermore, a bell mouth is connected to one end of the central column away from the seabed soil, and the steel pipe pile is inserted into the central column along the bell mouth.

[0013] Furthermore, one end of the steel pipe pile is inserted into the seabed soil along the central column so that the steel pipe pile is arranged vertically.

[0014] Furthermore, a flange is connected to one end of the steel pipe pile away from the seabed soil, and a fan is connected to the flange.

[0015] Further, the flange is located above the bell mouth.

[0016] The wind turbine foundation structure of the single pile, tripod and suction pile combination of the present invention has the following advantages: The tripod structure is stably placed on the seabed at a preset position by a sling, and then all the suction piles 7 are penetrated into the soil and reach the designed depth, ensuring that the overall verticality and horizontality meet the design requirements, and the steel pipe piles are lifted and passed through the inside of the central column until the bottom is located on the seabed, and pile sinking is started after the horizontality and verticality of the steel pipe piles meet the relevant requirements, and the steel pipe piles are driven into the designed depth. This application is suitable for deep water areas, more complex geological conditions, and more severe environmental conditions, and reduces the requirements for construction resources, processing machinery and tools, and offshore installation and construction equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the wind turbine foundation structure composed of a single pile, a tripod and a suction pile of the present invention; Figure 2 It is a static schematic diagram of the wind turbine foundation structure composed of a single pile, a tripod and a suction pile of the present invention; Figure 3 It is a top view of the wind turbine foundation structure composed of a single pile, a tripod and a suction pile of the present invention.

[0018] Description of the markings in the figure: 1. Center column; 2. Lower support; 3. Upper diagonal brace; 4. Lower diagonal brace; 5. Upper connection reinforcement section; 6. Lower connection reinforcement section; 7. Suction pile; 8. Steel pipe pile; 9. Fan; 10. Lifting ear; 11. Bell mouth; 12. Flange. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Figure 3 The wind turbine foundation structure of the present invention, which is a combination of a single pile, a tripod and a suction pile, is described.

[0022] like Figure 1 As shown, the wind turbine foundation structure of the single pile, tripod and suction pile combination in the present invention includes a central column 1 and a lower support 2, an oblique brace is connected between the lower support 2 and the central column 1, a connecting reinforcement section is provided between the oblique brace and the central column 1, the lower support 2 is connected to the suction pile 7, and the suction pile 7 is inserted into the seabed soil so that the central column 1 is stably set on the seabed; a steel pipe pile 8 is inserted into the central column 1, one end of the steel pipe pile 8 is connected to a wind turbine 9, and the end of the steel pipe pile 8 away from the wind turbine 9 is inserted into the seabed soil so that the wind turbine 9 is stably set on the sea.

[0023] The tripod structure is stably placed on the seabed at a preset position by a sling, and then all suction piles 7 are penetrated into the soil and reach the designed depth, ensuring that the overall verticality and horizontality meet the design requirements, and the steel pipe pile 8 is lifted and passed through the center column 1 until the bottom is located on the seabed, and the pile is sunk after the horizontality and verticality of the steel pipe pile 8 meet the relevant requirements, and the steel pipe pile 8 is driven into the designed depth. This application is suitable for deep water areas, complex geological conditions, and harsh environmental conditions, and reduces the requirements for construction resources, processing machinery and tools, and offshore installation and construction equipment.

[0024] Further, if Figure 1As shown, the diagonal brace includes an upper diagonal brace 3 and a lower diagonal brace 4, the upper diagonal brace 3 and the lower diagonal brace 4 are connected to the central column 1 at intervals, and the upper diagonal brace 3 and the lower diagonal brace 4 are connected to the lower support 2 at one end away from the central column 1; the upper connecting reinforcement section 5 and the lower connecting reinforcement section 6 are connected to the central column 1 at intervals, the upper diagonal brace 3 is connected to the upper connecting reinforcement section 5, and the lower diagonal brace 4 is connected to the lower connecting reinforcement section 6; the central column 1 is connected to three lower supports 2 through the upper diagonal brace 3 and the lower diagonal brace 4, and the three lower supports 2 are arranged in an equilateral triangle.

[0025] In this embodiment, the upper diagonal brace 3 and the lower diagonal brace 4 are welded on the central column 1 at intervals, and the upper diagonal brace 3 and the lower diagonal brace 4 are welded on the lower support 2 at one end away from the central column 1, and along the vertical direction, the upper diagonal brace 3 and the lower diagonal brace 4 are located in a straight line.

[0026] Preferably, an upper connection reinforcement section 5 is provided at the welding point between the central column 1 and the upper diagonal brace 3, and a lower connection reinforcement section 6 is provided at the welding point between the central column 1 and the lower diagonal brace 4. The upper connection reinforcement section 5 and the lower connection reinforcement section 6 can enhance the connection strength of the connection parts between the central column 1 and the upper diagonal brace 3 and the lower diagonal brace 4, and when stress concentration occurs, the connection components can be protected from damage, which would cause the entire foundation to lose its original function.

[0027] As a preferred embodiment, the size, angle, and material of the entire foundation form can be adjusted according to the engineering geological conditions, hydrogeological conditions, and environmental conditions of the specific project, and horizontal cross braces can be added between the three suction piles 7 to meet design requirements in more severe environments.

[0028] Three lower supports 2 are connected along the circumference of the central column 1 through upper diagonal supports 3 and lower diagonal supports 4. The three lower supports 2 are arranged as vertices in an equilateral triangle as a whole, and the central column 1 is located at the center of the equilateral triangle.

[0029] Further, if Figure 1 and Figure 2 As shown, the three lower supports 2 are all connected to the suction pile 7, and the suction pile 7 is inserted into the seabed soil at one end away from the lower support 2; the lower support 2 is connected with a lifting lug 10, and the lifting tool lifts the lifting lug 10 to make the central column 1 abut against the seabed soil; the central column 1 is connected to a bell mouth 11 at one end away from the seabed soil, and the steel pipe pile 8 is inserted into the central column 1 along the bell mouth 11.

[0030] In this embodiment, preferably, the three lower supports 2 are vertically welded to the suction piles 7, the central axis of the lower support 2 coincides with the central axis of the suction pile 7, a lifting ear 10 is welded at one end of the lower support 2 away from the suction pile 7, the lifting ear 10 is lifted by a lifting device, and the suction pile 7 is inserted into the seabed soil; after the suction pile 7 is completely inserted into the seabed soil, the bottom of the central column 1 abuts against the seabed soil.

[0031] The steel pipe piles 8 mainly bear the vertical load of the upper wind turbine structure, while the horizontal load of the entire structure is transmitted to the suction piles 7 through the diagonal braces and borne by the suction piles 7, which can greatly improve the anti-overturning performance and increase the water depth application range of the foundation form.

[0032] A bell mouth 11 is welded at one end of the central column 1 away from the seabed soil, so that the steel pipe pile 8 can be inserted into the central column 1 along the bell mouth 11 and then inserted into the seabed soil to achieve fixation.

[0033] Further, if Figure 1 and Figure 3 As shown, one end of the steel pipe pile 8 is inserted into the seabed soil along the central column so that the steel pipe pile 8 is arranged vertically; the end of the steel pipe pile 8 away from the seabed soil is connected to a flange 12, and the fan 9 is connected to the flange 12; the flange 12 is located above the bell mouth 11.

[0034] In this embodiment, preferably, a flange 12 is connected to one end of the steel pipe pile 8 away from the seabed soil, and the wind turbine is connected to the steel pipe pile 8 through the flange 12 to realize the construction of the offshore wind turbine.

[0035] After the steel pipe pile 8 is inserted into the predetermined position of the seabed soil, sealing materials such as concrete are poured between the steel pipe pile 8 and the central column 1 so that the central column 1 and the steel pipe pile 8 form a structural whole, which can increase the stability of the foundation.

[0036] Preferably, during the sinking of the steel pipe pile 8, the central column 1 plays a role in straightening the steel pipe pile 8, and the horizontality and verticality of the steel pipe pile 8 during penetration into the soil need to be monitored. When any abnormal situation occurs, the pile sinking should be stopped in time, and the pile sinking should continue to be carried out to the design depth after the problem is eliminated.

[0037] The wind turbine foundation structure based on the combination of a single pile, a tripod and a suction pile is stably placed on the seabed at a preset position by a sling, and then all the suction piles 7 are penetrated into the soil and reach the designed depth, ensuring that the overall verticality and horizontality meet the design requirements, and the steel pipe pile 8 is lifted and passed through the inside of the central column 1 along the bell mouth 11 until the bottom is located on the seabed, and the pile is sunk after the horizontality and verticality of the steel pipe pile 8 meet the relevant requirements, and the steel pipe pile 8 is driven into the designed depth. This application is suitable for deep water areas, more complex geological conditions, and more severe environmental conditions, and reduces the requirements for construction resources, processing machinery and tools, and offshore installation and construction equipment.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A wind turbine foundation structure composed of a single pile, a tripod and a suction pile, characterized in that: It includes a central column and a lower support, an oblique brace is connected between the lower support and the central column, a connecting reinforcement section is provided between the oblique brace and the central column, the lower support is connected to a suction pile, and the suction pile is inserted into the seabed soil so that the central column can be stably set on the seabed; a steel pipe pile is inserted into the central column, one end of the steel pipe pile is connected to a wind turbine, and the end of the steel pipe pile away from the wind turbine is inserted into the seabed soil so that the wind turbine can be stably set at sea.

2. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 1 is characterized in that: The diagonal brace comprises an upper diagonal brace and a lower diagonal brace, the upper diagonal brace and the lower diagonal brace are connected to the central column at intervals, and one end of the upper diagonal brace and the lower diagonal brace away from the central column is connected to the lower support at intervals.

3. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 2 is characterized in that: An upper connection reinforcement section and a lower connection reinforcement section are connected at intervals on the central column, an upper diagonal brace is connected to the upper connection reinforcement section, and a lower diagonal brace is connected to the lower connection reinforcement section.

4. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 3 is characterized in that: The central column is connected with three lower supports through an upper diagonal support and a lower diagonal support, and the three lower supports are arranged in an equilateral triangle.

5. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 4, characterized in that: The three lower supports are all connected to the suction piles, and the suction piles are inserted into the seabed soil at one end away from the lower support.

6. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 5, characterized in that: The lower support is connected with a lifting lug, and the lifting lug is lifted by a lifting tool so that the central column abuts against the seabed soil.

7. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 6, characterized in that: One end of the central column away from the seabed soil is connected with a bell mouth, and the steel pipe pile is inserted into the central column along the bell mouth.

8. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 7, characterized in that: One end of the steel pipe pile is inserted into the seabed soil along the central column so that the steel pipe pile is arranged vertically.

9. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 8, characterized in that: A flange is connected to one end of the steel pipe pile away from the seabed soil, and a fan is connected to the flange.

10. The wind turbine foundation structure of the combination of a single pile, a tripod and a suction pile according to claim 9, characterized in that: The flange is located above the bell mouth.

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