Offshore wind power single pile-friction wing composite foundation and construction method thereof

Abstract

The invention discloses an offshore wind power single pile-friction wing composite foundation and a construction method thereof. The offshore wind power single pile-friction wing composite foundation comprises a single pile and a friction wing, wherein the friction wing is connected to the single pile through a force transmission pipe, a conical transition section of the single pile goes deep into a seabed bearing stratum, and the force transmission pipe of the friction wing located in the bearing stratum is in close contact with the conical transition section of the single pile; a side wing of the friction wing is connected to the outer wall of the force transmission pipe, and a ring wing is arranged in a side wing included angle. According to the offshore wind power single pile-friction wing composite foundation, the friction wing is of a through structure in the axial direction, so that the friction wing can conveniently penetrate through a seabed sludge layer to be embedded into the bearing stratum; the side wing, the ring wing and the force transmission pipe support each other, so that the structural stability of the friction wing is kept, a soil arching effect is generated between the side wing and the ring wings by a soil body, the resistance of the soil body is remarkably improved, the interaction area of the structure and the soil body is increased by the friction wing, and the bearing capacity of the single pile-friction wing composite foundation is improved.

Description

technical field [0001] The invention belongs to the technical field of offshore wind power foundation and construction, and relates to an offshore wind power single pile-friction wing composite foundation and a construction method thereof. Background technique [0002] Domestic offshore wind power foundation structures are mainly based on single pile foundations, jacket foundations, high pile cap foundations, and barrel foundations. The single pile foundation is a 6-10m steel pipe pile, which has the advantages of clear structural force, simple manufacturing and construction process, and short construction period. It is the most commonly used foundation type for offshore wind farms with a water depth of less than 30m. The basic type accounts for more than 80%. However, for the sea areas of Fujian and Guangdong, the clay and sand covering layers at some aircraft sites are relatively shallow, and the anchorage depth of conventional single pile foundations often cannot meet th...

AI Technical Summary

Problems solved by technology

However, for offshore wind farms with a thicker silt layer above the seabed cover, it is difficult for the rockfill body in the monopile and rockfill composite foundation, and the cylinder in the monopile and cylinder composite foundation to pass through the silt layer located / The bearing layer is embedded in the bearing layer to effectively play its supporting role. Although the single pile and friction ring composite foundation can pass through the mud layer, the bearing capacity of the composite foundation can only be increased by the friction and support provided by the support wing plate and friction ring, but the friction The ring only relies on the friction force between the structure wall and the surrounding soil and the passive soil resistance, and the single pile and the friction ring need to be fabricated, transported, and constructed in one piece, and the construction is difficult; The load is larger, and the wing plate structure in the single pile and wing plate composite foundation is prone to bending, twisting, and even buckling, which cannot achieve the purpose of improving the horizontal bearing capacity of the single pile foundation

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