Offshore single pile foundation with compacted grouting reinforcement foundation

Abstract

The invention relates to an offshore single pile foundation with a compacted grouting reinforcement foundation in the pile foundation field of ocean engineering. According to the technical scheme, a steel pipe pile is sunk to a seabed, the seabed is a soft soil foundation, in the soft soil foundation, a reinforced foundation with compacted grouting technology is arranged on the periphery of the steel pipe pile, and the reinforced foundation includes a compacted grouting bubble, a drainage channel and soft soil between the compacted grouting bubble and the drainage channel; and the reinforced foundation is a rotating body coaxial with the steel pipe pile. The offshore single pile foundation has high horizontal bearing capacity, small pile top horizontal displacement, small pile body inclination and large foundation stiffness, adapts to the characteristics of large horizontal load of an offshore wind turbine, meets the strict requirements of the offshore wind turbine on foundation horizontal displacement and pile body inclination, and meets the requirements of 'structure + foundation' integral natural vibration frequency.

Description

technical field [0001] The invention relates to the field of pile foundations of marine engineering, in particular to an offshore single pile foundation with high horizontal bearing capacity in soft soil foundations. Background technique [0002] Offshore wind power generation is the focus of development in the field of new energy, and the market prospect is very broad. The fan unit has strict control standards for the horizontal displacement and uneven settlement of the foundation, and the natural vibration frequency of the "structure + foundation" needs to avoid the driving frequency of the external load. At present, the common foundation types of offshore wind turbines include single pile, high pile cap, multi-pod, jacket, gravity type, negative pressure bucket type and floating platform structure. In offshore wind power projects, monopile foundations are widely used because of their advantages such as small footprint, simple structure, quick construction, and low cost; ...

AI Technical Summary

Problems solved by technology

Although steel pipe piles have relatively high bending stiffness, the soil on the foundation surface around the piles can provide limited horizontal constraints.

If a conventional single pile foundation is adopted, increasing the pile diameter, pile length or wall thickness will lead to more material consumption, and the increase in the weight of the single pile will also bring higher construction difficulty, which will increase the foundation cost rapidly and affect the wind farm. power generation benefit

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