Offshore single pile foundation with high pressure jet grouting pile reinforced foundation

Abstract

The invention discloses an offshore single pile foundation with a high pressure jet grouting pile reinforced foundation, and belongs to the field of pile foundations of ocean engineering. According tothe technical scheme, the offshore single pile foundation includes a steel pipe pile sunk into a seabed soft soil foundation, in the soft soil foundation, the reinforced foundation formed by a high pressure jet grouting method is arranged on the periphery of the steel pipe pile, and the reinforced foundation is a rotating body coaxial with the steel pipe pile; the reinforced foundation includes high pressure jet grouting piles and soft soil between the high pressure jet grouting piles; the inner ring high pressure jet grouting piles in the reinforced foundation are arranged to form an inner ring high pressure jet grouting pile wall body; and the inner ring high pressure jet grouting pile wall body is in contact with a pile body of the steel pipe pile. According to the offshore single pilefoundation, the horizontal bearing capacity is high, the horizontal displacement of the pile top is small, the pile body inclination is small, the foundation stiffness is large, the offshore single pile foundation adapts to the characteristics of large horizontal load of an offshore wind turbine, the strict requirements of the offshore wind turbine on foundation horizontal displacement and pile body inclination are met, and the requirements of the 'structure and foundation' integral natural vibration frequency are met.

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 type, gravity type, negative pressure bucket and floating platform structure, etc. In offshore wind power projects, monopile foundations are widely used because of their advantages such as small footprint, simple structure, quick construction, and low c...

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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