Offshore large-diameter pile foundation with ice-resistant structure

Abstract

The present invention discloses an offshore large-diameter pile foundation with an ice-resistant structure. The offshore large-diameter pile foundation with the ice-resistant structure comprises a plurality of ice-resistant standard parts that are welded in a circle symmetrically and uniformly around the pile foundation made of steel. A primary stiffened plate and upper and lower secondary stiffened plates are arranged through the plurality of ice-resistant standard parts. The plurality of ice-resistant standard parts, the primary stiffened plate, and the upper and lower secondary stiffened plates are connected and fixed to form the ice-resistant structure. The ice-resistant standard parts provided by the present invention are each provided with icebreaking blades, such that concentrated stress is produced on sea ice, and the sea ice thus is easy to break; the icebreaking blades are each in an inwardly recessed arc shape, which is also conducive to breaking sea ice; ice blocking lugs force sea ice to turn over and fall off, and prevent the sea ice from contacting with the pile foundation; moreover, the ice-resistant standard parts are distributed axisymmetrically around the pile foundation, and can resist the effect of sea ice in any direction.

Description

Technical field: [0001] The invention relates to the technical field of ocean engineering, in particular to an offshore large-diameter pile foundation with an ice-resistant structure. Background technique: [0002] my country's Liaodong Bay, Bohai Bay and Laizhou Bay freeze in winter, and the freezing conditions vary according to water depth and offshore distance. Drift ice forms in the deep water area far from the coast, fixed ice forms in the shallow water area near the coast, and accumulated ice (ice ridges) forms in extremely shallow seas, intertidal zones, and flat areas. Liaohe beach sea ice situation is heavy, the 50-year return period of fixed ice thickness is 50cm, and the maximum velocity of drift ice is 1.0~1.1m / s. In Liaodong Bay on January 11, 2010, the maximum outer edge of the floating ice reached 131km, and the thickness of a single layer of sea ice exceeded 30cm. In 2010, Bayuquan Port in Yingkou, known as the northernmost ice-free port in China, had a loc...

AI Technical Summary

Problems solved by technology

[0004] Usually, the anti-icing structure of the pile foundation is designed as a conical structure. For large-diameter piles, if the conical structure is used, the large diameter will cause the volume of the cone to be large, the amount of work will be large, and the construction will be difficult.

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