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Pile-tube composite truss type offshore wind turbine foundation and construction process thereof

An offshore fan and truss-type technology, applied in infrastructure engineering, construction, etc., can solve the problems that the suction cylinder cannot completely sink at the same time, it is difficult to ensure the level of the structure, and the uplift of soil plugs, so as to improve the bearing capacity and long-term stability performance, optimized performance and natural frequency, and improved bearing capacity

Inactive Publication Date: 2020-07-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, as the water depth increases, soil plugs are likely to bulge or even buckle inside the tube, resulting in the suction tube not being able to fully sink to the design depth at the same time, and it is difficult to ensure the levelness of the structure. difficulty

Method used

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  • Pile-tube composite truss type offshore wind turbine foundation and construction process thereof
  • Pile-tube composite truss type offshore wind turbine foundation and construction process thereof
  • Pile-tube composite truss type offshore wind turbine foundation and construction process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The structure of the pile composite truss type offshore wind power foundation provided by this embodiment is as follows: Figure 1-3 As shown, it consists of two major parts, the upper truss structure 1, the combined part of the suction tube 2 and the pile foundation 4 at the lower part.

[0047] The truss structure 1 includes: any jacket structure that can be used to carry wind turbines and towers. In this embodiment, the bottom connection form of the jacket is three jacket legs.

[0048] The combined part of the suction cylinder 2 and the pile foundation 4 includes: a cylindrical thin-walled suction cylinder 2 with an open bottom, and the top end of the suction cylinder 2 is connected to the legs of the jacket through a reinforcing member 7 . The suction cylinder 2 is provided with an embedded sleeve 3 for installing the pile foundation 4. The embedded sleeve 3 is connected with the suction cylinder 2 through a reinforcing member, and both ends of the embedded sleeve...

Embodiment 2

[0050] Such as Figure 4 to Figure 7 As shown, the pile-tube composite truss-type offshore wind power foundation provided in this embodiment is different from Embodiment 1 in that it also includes a sealing cover 12 that is movably connected to the top of the embedded sleeve. The sealing cover 12 and the embedded sleeve 3 are provided with a A series of sealing rings and sealing rings 9 are used to ensure the sealing performance; bolts can be used to connect the parts 11 between the sealing cover 12 and the embedded sleeve 3, and a pre-tightening force can be applied to ensure the sealing performance. The sealing cover is fixed by any connection method such as a device; the upper part of the sealing cover is provided with lifting lugs 10, which are used to lift the sealing cover away after the suction cylinder sinks; the embedded sleeve 3 is connected with the suction cylinder 2 through a strengthening member.

[0051] Such as Figure 13 As shown (the suction cylinder is also...

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Abstract

The invention discloses a pile-tube composite truss type offshore wind turbine foundation. The pile-tube composite truss type offshore wind turbine foundation comprises a truss type structure, a suction barrel and a pile foundation, wherein the suction barrel is connected to the bottom of the truss type structure; and an embedded sleeve for mounting the pile foundation is arranged on the suction barrel. The invention further discloses a construction process for the offshore wind turbine foundation, and the construction process comprises the following steps: lifting and placing the truss type structure, and the suction barrel connected to the bottom of the truss type structure to a seabed, penetrating the truss type structure and the suction barrel into the seabed after being in contact with the seabed until the bottom end of the embedded sleeve is sunk into soil, and forming a sealed space in the suction barrel; performing water pumping operation on the suction barrel, dropping the suction barrel to specified elevation, switching off a suction pump, and sealing a pump connector through a cover plate or grouting measures, thereby accomplishing mounting of the suction barrel; and after the suction barrel is mounted, inserting the pile foundation into the embedded sleeve, and grouting a gap between the pile foundation and the embedded sleeve after pile sinking is accomplished. According to the structure of the offshore wind turbine foundation and a construction method thereof disclosed by the invention, pile-tube composite truss type offshore wind turbine foundation has higherstability and bearing ability, can resist limit load such as a typhoon, and is strong in adaptation to the seabed.

Description

technical field [0001] The invention relates to the field of offshore wind power engineering, in particular to a pile barrel composite truss type offshore wind turbine foundation and a construction process thereof. Background technique [0002] As a renewable energy source, offshore wind power has been vigorously researched and promoted by countries all over the world in recent years. The negative pressure cylinder (suction cylinder) is a large-diameter cylindrical thin-walled structure. As a mooring form and foundation form, the negative pressure cylinder has been widely used in marine structure mooring systems, marine foundation platforms and marine wind turbine foundations. , has the advantages of simple assembly, high construction efficiency and low cost. [0003] For example, the Chinese patent document with publication number CN109914460A discloses a novel suction cylinder combined structure wind power foundation suitable for shallow seas, which relates to the technic...

Claims

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Application Information

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IPC IPC(8): E02D27/42E02D27/44E02D27/52
CPCE02D27/42E02D27/44E02D27/52
Inventor 朱嵘华王立忠王复明梁旭
Owner ZHEJIANG UNIV
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