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Offshore wind electricity single pile-wing plate-rockfill composite foundation and construction method thereof

A technology of offshore wind power and composite foundation, which is applied in the direction of infrastructure engineering, construction, etc., can solve the problems of increasing the construction cost of offshore wind farms, the impact on the safe and stable operation of wind turbines, and the increase in the cost of single piles, so as to avoid construction risks and reduce piles. The anchorage length of the body ensures the effect of safe and stable operation

Pending Publication Date: 2020-04-10
CHINA THREE GORGES CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the pile diameter and pile length means that the single pile production cost increases and the construction difficulty increases
In addition, for some deep-water and shallow seabeds in my country, even if the pile length and pile diameter are increased, the horizontal bearing capacity of the pile foundation cannot be met, and rock-socketed pile construction is still required. However, the construction of rock-socketed piles is more difficult and the construction speed Slow, it will further increase the construction cost of offshore wind farms
In addition, due to the installation of large-diameter monopile foundations on the seabed, waves and currents will generate eddies around the piles, scouring the seabed soil near the monopile foundations, and affecting the safe and stable operation of the wind turbine.

Method used

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  • Offshore wind electricity single pile-wing plate-rockfill composite foundation and construction method thereof
  • Offshore wind electricity single pile-wing plate-rockfill composite foundation and construction method thereof
  • Offshore wind electricity single pile-wing plate-rockfill composite foundation and construction method thereof

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Embodiment Construction

[0026] Such as Figure 1-Figure 4 Among them, an offshore wind power single pile-wing plate-rockfill body composite foundation, which includes a single pile 1, a wing plate 2 and a rockfill body 3; the plurality of wing plates 2 are connected and fixed to the single pile 1, and the rockfill body 3 surrounds the single pile 1, the upper end of the wing plate 2 is located inside the rock-fill body 3, and the lower end of the wing plate 2 is located at the seabed bearing layer; the rock-fill body 3 is densely packed on the seabed near the pile body Obtained; the wing plate 2 is an irregular tapered plate. By setting the rockfill body 3 on the seabed near the single pile 1 to strengthen the soil around the pile, the bearing capacity of the soil around the pile can be improved, the erosion of the seabed soil by waves and currents can be prevented, and the safe and stable operation of the unit can be ensured; the wing of the conical structure The plate 2 is welded to the single pil...

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Abstract

The invention discloses an offshore wind electricity single pile-wing plate-rockfill composite foundation and a construction method thereof. The foundation comprises a single pile, a wing plate and rockfill, the wing plate is of a conical structure, and is welded to the outer wall of a pile body, the rockfill is formed through dense stacking of the rockfill, the upper end of the wing plate is located in the rockfill, and the lower end of a pile wing is located on a seabed supporting layer. The construction method of the offshore wind electricity single pile-wing plate-rockfill composite foundation comprises the following steps of S1, determining the sizes of the single pile, the wing plate and the rockfill; S2, driving the single pile with the wing plate by the designed anchorage depth; and S3, stacking the rockfill on a seabed nearby the single pile. The problems of the low single pile bearing force, the large pile wing of the wing plate pile, serious foundation washing and the like can be solved, the single pile, wing plate and rockfill combination structure uses pile periphery soil resistance and rockfill friction force, the pile foundation bearing force can be improved, the pile foundation horizontal displacement can be reduced, the wing plate size is reduced, a wing plate stress mechanism is changed, washing of waves and ocean currents to seabed soil can be blocked, and safe and stable running of an offshore wind generation set can be ensured.

Description

technical field [0001] The invention belongs to the technical field of offshore wind power, and relates to an offshore wind power single pile-wing plate-rockfill composite foundation and a construction method thereof. Background technique [0002] Offshore wind power, as a clean energy source, has the characteristics of high wind speed, stable wind speed and large unit capacity, and is in a period of rapid development. At present, the type of offshore wind turbine foundation is mainly single pile foundation. The monopile foundation has the advantages of strong adaptability to terrain conditions, fast construction speed, and low construction cost. [0003] During the operation of offshore wind turbines, the single pile foundation not only bears the vertical load generated by the self-weight of the wind turbine unit and the pile foundation, but also bears the horizontal loads generated by wind, breaking waves, ocean currents and sea ice. Under the action of horizontal cyclic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/42E02D27/44E02D27/12
CPCE02D27/425E02D27/44E02D27/12
Inventor 王卫闫俊义
Owner CHINA THREE GORGES CORPORATION
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