Pile foundation structure reinforced by single-pile foundation of offshore wind turbine generator set and construction method

A single-pile foundation and offshore wind power technology, which is applied to foundation structure engineering, sheet pile walls, buildings, etc., can solve problems such as increased load of wind turbines, excessive verticality error of pile sinking, difficulty in sinking piles in place, etc., to achieve reduction The effect of investment cost, simple structure design and wide application prospect

Pending Publication Date: 2019-05-31
FUJIAN PROVINCIAL INVESTIGATION DESIGN & RES INST OF WATER CONSERVANCY & HYDROPOWER
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, the diameter of the largest single pile foundation in China is 7-7.5m. However, with the increase of the capacity of the wind turbine unit in the future, the load of the wind turbine unit will be further increased, and the diameter of the single pile foundation will reach 8-10m. Construction capacity of 10m pile foundation
According to the construction experience and statistics of offshore wind farms that have been built and are under construction, it is difficult to control the verticality of large-diameter single pile foundations. It is difficult to sink piles in place f...

Method used

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  • Pile foundation structure reinforced by single-pile foundation of offshore wind turbine generator set and construction method
  • Pile foundation structure reinforced by single-pile foundation of offshore wind turbine generator set and construction method
  • Pile foundation structure reinforced by single-pile foundation of offshore wind turbine generator set and construction method

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Embodiment 1

[0039] Embodiment one: if Figure 1~2 As shown, the present invention provides a single-pile foundation reinforcement structure for offshore wind turbines, including a vertically arranged single-pile foundation 100 for offshore wind turbines, and four steel pipes that are uniformly distributed around the single-pile foundation 100 Pile 200, the four steel pipe piles are all parallel to the single pile foundation, the diameter of the steel pipe pile 200 is smaller than the diameter of the single pile foundation 100 and sinks into the seabed body, the four steel pipe piles 200 and the single pile foundation 100 There are two layers of composite beam structure at intervals from top to bottom. The composite beam structure includes a central sleeve 210 fixedly sleeved on the outside of the single pile foundation 100. The outside of the central sleeve 210 is provided with four A skirt pile sleeve 220 uniformly distributed on the circumference and corresponding to the position of the...

Embodiment 2

[0045] Embodiment two: if Figure 3-4 As shown, the difference between the present embodiment and the first embodiment is that at least three steel pipe piles are radially distributed, and each steel pipe pile is arranged obliquely to the single pile foundation. It should be noted that the angle between the steel pipe pile and the single pile foundation can be set or adjusted according to actual needs.

[0046] Through the research and development of the single pile foundation of offshore wind turbines to strengthen the pile foundation structure, the reliable connection between multiple steel pipe piles and composite beam structures and the single pile foundation of offshore wind turbines can effectively improve the compression resistance, pullout resistance and horizontal bearing capacity of the single pile foundation Force, horizontal height, overall structural stability, short offshore construction time, and easy control of construction accuracy, not only can efficiently an...

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Abstract

The invention relates to a pile foundation structure reinforced by a single-pile foundation of an offshore wind turbine generator set and a construction method, which comprises an offshore wind turbine generator set single pile foundation and at least three steel pipe piles which are circumferentially and uniformly distributed around the single-pile foundation, wherein at least one layer of combined beam system structure is arranged between the at least three steel pipe piles and the combine beam system structure comprises a central sleeve fixedly sleeving the outer side of the single pile foundation; the outer side of the central sleeve is provided with at least three skirt pile sleeves which are uniformly distributed in circumference and the positions of which are corresponding to the positions of steel pipe piles, the skirt pile sleeves are fixed on the outside of the steel pipe piles, combined beams are fixedly arranged between the skirt pile sleeves and the central sleeves, according to the invention, the structural design is reasonable, the horizontal bearing capacity and rigidity of the single-pile foundation and the integral stability of the structure can be improved, the investment cost is also reduced, the structure has universal applicability and wide application prospect in the field of ocean wind power.

Description

Technical field: [0001] The invention belongs to the technical field of foundation structures of offshore wind power generating sets, and in particular relates to a single pile foundation reinforcement pile foundation structure and a construction method of offshore wind power generating sets. Background technique: [0002] At present, the foundation types of wind turbines used in offshore wind farms at home and abroad are mainly four types: pile foundation, gravity foundation, suction cylinder foundation and floating foundation, among which pile foundation can be subdivided into single pile foundation, multi-pod foundation, jacket Foundations and high pile cap foundations. The single-pile foundation is mainly composed of a large-diameter steel pipe pile, and its length and embedding depth are jointly determined by the water depth, geological conditions and the load of the wind turbine. The monopile foundation has been widely used in foreign offshore wind farms because of it...

Claims

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Application Information

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IPC IPC(8): E02D27/44E02D27/42E02D27/12E02D5/64
Inventor 甘毅李祖发陈继泉郑俨刚董钿王桂兰张金福
Owner FUJIAN PROVINCIAL INVESTIGATION DESIGN & RES INST OF WATER CONSERVANCY & HYDROPOWER
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