Combined pile foundation structure

Abstract

The invention discloses a combined pile foundation structure. A hollow cone structure coaxial to a barrel-shaped foundation is arranged on the top of the barrel-shaped foundation; the centre of the top surface of the hollow cone structure is provided with a first connecting section ring girder structure; the centre of the top cover of the barrel-shaped foundation is provided with a second connecting section ring girder structure; a single-pile foundation is inserted in the first connecting section ring girder structure at the upper part and the second connecting section ring girder structure at the lower part; and the single-pile foundation is respectively fixedly connected with the first connecting section ring girder structure and the second connecting section ring girder structure. According to the combined pile foundation structure, the advantages of clear stress, strong applicability to soil layers, convenience in construction and good horizontal carrying capacity of the barrel-shaped foundation of the single-pile foundation are sufficiently utilized; the integral rigidness, horizontal load resistance, vertical load resistance and bending moment capacity are greatly improved, the bending moment load of a blower load to the foundation is effectively reduced and the horizontal displacement of a wind power structure is reduced, so that the pile length, pile diameter, wall thickness and penetrating depth of the pile foundation are reduced, the cost of materials is greatly reduced and the construction process is simpler.

Description

technical field [0001] The invention relates to a foundation structure in the construction field, in particular to a pile foundation structure. Background technique [0002] Offshore wind power structures are high-rise offshore structures with relatively small vertical loads and large bending moments caused by horizontal loads, and require high anti-overturning capabilities. [0003] The monopile foundation structure is a common form of foundation for offshore structures, especially in the field of offshore wind power. It is most widely used in European offshore fields. Its structure is simple and its force mechanism is clear. It is economical to use for wind turbines below 1.5MW. However, due to the weaknesses of the single pile foundation such as poor anti-overturning ability and large horizontal displacement, as the single unit capacity of offshore wind turbines increases to 3MW, 5MW or more, the diameter, wall thickness and penetration depth of the single pile foundation...

AI Technical Summary

Problems solved by technology

However, due to the weaknesses of the single pile foundation such as poor anti-overturning ability and large horizontal displacement, as the single unit capacity of offshore wind turbines increases to 3MW, 5MW or more, the diameter, wall thickness and penetration depth of the single pile foundation will inevitably increase sharply. Large, resulting in difficulties in offshore piling construction and a substantial increase in construction costs

[0004] Three-pile tripods, multi-pile jackets, and barrel foundations can effectively disperse loads and improve overturning resistance through different methods, but their structures and construction processes are complex, and they have high requirements for sea conditions, resulting in long construction periods and high construction costs.

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