PILE-CYLINDER-TRUSS COMPOSITE OFFSHORE WIND TURBINE FOUNDATION AND CONSTRUCTION PROCESS THEREOF

Abstract

Disclosed is a pile-cylinder-truss composite offshore wind turbine foundation. The pile-cylinder-truss composite offshore wind turbine foundation includes a truss structure, a suction cylinder and a pile foundation. The suction cylinder is connected to a bottom portion of the truss structure, and an embedded sleeve for mounting the pile foundation is provided on the suction cylinder. The embedded sleeve is located inside, at an edge of or outside the suction cylinder. The present invention also provides a construction process of the pile-cylinder-truss composite offshore wind turbine foundation.

Claims

1. A pile-cylinder-truss composite offshore wind turbine foundation, comprising a truss structure, a suction cylinder and a pile foundation, wherein the suction cylinder is connected to a bottom portion of the truss structure, and an embedded sleeve for mounting the pile foundation is provided on the suction cylinder.

2. The pile-cylinder-truss composite offshore wind turbine foundation according to claim 1, wherein the embedded sleeve is located inside, at an edge of or outside the suction cylinder.

3. The pile-cylinder-truss composite offshore wind turbine foundation according to claim 2, wherein a solidified grouting layer is provided between the embedded sleeve and the pile foundation.

4. The pile-cylinder-truss composite offshore wind turbine foundation according to claim 2, wherein when the embedded sleeve is located inside or at the edge of the suction cylinder, reinforcing members are provided in the suction cylinder for supporting the suction cylinder and connecting the suction cylinder with the embedded sleeve.

5. The pile-cylinder-truss composite offshore wind turbine foundation according to claim 1, wherein a top end of the suction cylinder is provided with a pump interface for connecting a suction pump or a suction pipeline.

6. The pile-cylinder-truss composite offshore wind turbine foundation according to claim 1, wherein the truss structure comprises a jacket structure for bearing a wind turbine and a tower, and the jacket structure comprises a plurality of jacket legs.

7. The pile-cylinder-truss composite offshore wind turbine foundation according to claim 6, wherein the jacket legs are connected to a top end of the suction cylinder through reinforcing members.

8. The pile-cylinder-truss composite offshore wind turbine foundation according to claim 6, wherein a number of the jacket legs is at least three.

9. A construction process of pile-cylinder-truss composite offshore wind turbine foundation according to claim 1, wherein the construction process comprising the following steps: step (1): hoisting the truss structure and the suction cylinder connected to the bottom portion of the truss structure to a seabed, wherein after contacting the seabed, the truss structure and the suction cylinder penetrate the seabed until a bottom end of the embedded sleeve is immersed in soil, and a closed space is formed in the suction cylinder; step (2): pumping the suction cylinder through a suction pump or a suction pipeline, such that the suction cylinder sinks to a specified elevation, shutting down the suction pump after the suction cylinder reaches the specified elevation, and sealing a pump interface through a cover plate or grouting measures to complete mounting of the suction cylinder; and step (3): inserting the pile foundation into the embedded sleeve after the suction cylinder is mounted, and grouting a gap between the pile foundation and the embedded sleeve after pile sinking is completed.

10. The construction process of pile-cylinder-truss composite offshore wind turbine foundation according to claim 9, wherein in the step (2), when the suction cylinder does not sink to the specified elevation or does not meet structural level requirements after pumping the suction cylinder through the suction pump or the suction pipeline, knocking the embedded sleeve by a pile hammer to complete sinking and leveling operations.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a structural schematic diagram of a pile-cylinder-truss composite offshore wind turbine foundation provided in Embodiment I;

[0029] FIG. 2 is a schematic structural diagram of a suction cylinder and a pile foundation provided in Embodiment I;

[0030] FIG. 3 is a schematic top view of the suction cylinder and the pile foundation provided in Embodiment I;

[0031] FIG. 4 is a structural schematic diagram of a pile-cylinder-truss composite offshore wind turbine foundation provided in Embodiment II;

[0032] FIG. 5 is a schematic structural diagram of a suction cylinder and a pile foundation provided in Embodiment II;

[0033] FIG. 6 is a schematic top view of the suction cylinder and the pile foundation provided in embodiment II;

[0034] FIG. 7 is a structural diagram of a pile-cylinder-truss composite offshore wind turbine foundation provided in Embodiment III;

[0035] FIG. 8 is a schematic structural diagram of a suction cylinder and a pile foundation provided in Embodiment III;

[0036] FIG. 9 is a schematic top view of the suction cylinder and the pile foundation provided in Embodiment III.

DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the object, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the scope of protection of the present invention.

Embodiment I

[0038] As shown in FIGS. 1-3, the pile-cylinder-truss composite offshore wind power foundation structure provided in this embodiment consists of two parts, a truss structure 1 at the upper part and a combined part of the suction cylinder and pile foundation at the lower part.

[0039] The truss structure 1 includes any jacket structure that can be used for bearing wind turbines and towers, and the bottom connection form of the jacket is three jacket legs.

[0040] The structure of the combined part of the suction cylinder 3 and the pile foundation 4 comprises a cylindrical thin-walled suction cylinder 2 with an open lower part, and the top end of the suction cylinder 2 is connected to the jacket legs through reinforcing members 7. An embedded sleeve 3 for mounting pile foundation 4 is provided in the suction cylinder 2, and the embedded sleeve 3 is connected to the suction cylinder 2 through reinforcing members 8. The two ends of the embedded sleeve 3 are open. The position, length and diameter of the embedded sleeve are determined according to the actual situation. The inner part of the suction cylinder 2 is also provided with reinforcing members 8 to ensure the connection between the suction cylinder 2 and the embedded sleeve 3. The pile foundation 4 can be driven into the seabed through the embedded sleeve 3 to increase the bearing capacity of the foundation structure, and the pile foundation 4 is connected to the embedded sleeve 3 through the grouting layer 5. The top end of the suction cylinder 3 is provided with a pump interface 6 for connecting with an underwater suction pump.

Embodiment II

[0041] As shown in embodiment I and FIGS. 4-6, a pile-cylinder-truss composite offshore wind power foundation provided in this embodiment is different in that an embedded sleeve 3 is provided at the edge of the suction cylinder 2. The edge of the cylinder means that the suction cylinder 2 is tangent to the embedded sleeve 3.

Embodiment III

[0042] As shown in embodiment I and FIGS. 7-9, a pile-cylinder-truss composite offshore wind power foundation provided in this embodiment is different in that an embedded sleeve 3 is provided outside the suction cylinder 2, and there is no need for a reinforcing member connected to the embedded sleeve 3 in the suction cylinder 2.

[0043] The construction process of the pile-cylinder-truss composite offshore wind turbine foundations provided in Embodiments 1-3 includes the following steps.

[0044] (1) Hoisting the truss structure and the suction cylinder connected to the bottom portion of the truss structure to the seabed, wherein the truss structure and the suction cylinder penetrate the seabed after contacting the seabed until a bottom end of an embedded sleeve is immersed in soil, thus forming a closed space in the suction cylinder.

[0045] (2) Pumping the suction cylinder by an underwater suction pump, such that the suction cylinder sinks to a specified elevation, shutting down the suction pump after the suction cylinder reaches the specified elevation, and sealing the pump interface through a cover plate or grouting measures to complete the mounting of the suction cylinder. When the suction cylinder does not sink to the specified elevation or does not meet structural level requirements after pumping the suction cylinder through the suction pump or the suction pipeline, the embedded sleeve is knocked by a pile hammer to complete sinking and leveling operations.

[0046] (3) Inserting the pile foundation into the embedded sleeve after the suction cylinder is mounted, and grouting a gap between the pile foundation and the embedded sleeve after pile sinking is completed.

[0047] The technical schemes and beneficial effects of the present invention in detail have been described in the above specific embodiments. It should be understood that the above embodiments are only the most preferred embodiment of the present invention, and are not intended to limit the present invention. Any modification, supplement and equivalent substitution made within the principle scope of the present invention should fall within the protection scope of the present invention.