Offshore wind power steel pipe pile foundation reinforcement method with anti-scour ability

Abstract

The invention discloses an offshore wind power steel pipe pile foundation reinforcement method with the anti-scour ability, and belongs to the field of offshore wind plant foundation treatment. The method mainly includes the step of construction of a reinforcement zone, a cushion and a scour protection layer, a cement-soil mixing pile method is preferred for reinforcement, and the cushion and thescour protection layer adopt a riprap method; cement mixing piles are vertically arranged at the equal length or the variable length, and various arrangement forms such as a radial type, a ring type are achieved in the horizontal direction; according to the soil body properties around the piles, an appropriate foundation reinforcement range B and a reinforcement depth H are determined; and the cushion and the scour protection layer are laid on the upper part, and the certain anti-scour ability is achieved. According to the offshore wind power foundation reinforcement method, the physical and mechanical properties of a shallow soil body can be effectively improved, soil body resistance is increased, and the purposes of improving the horizontal bearing capacity of a pile foundation, reducinghorizontal displacement of the pile foundation, and lowering the engineering cost are achieved.

Description

technical field [0001] The invention belongs to the field of foundation reinforcement treatment in soft soil areas under complex marine environments, and in particular relates to a foundation reinforcement method for offshore wind power steel pipe pile foundations with anti-scouring capability. Background technique [0002] Large-diameter steel pipe pile foundation is a commonly used foundation form for offshore wind power facilities to prevent erosion. Displacement threatens the safety of the upper fan. The production cost of large-diameter steel pipe piles is high, coupled with high requirements for construction technology and construction equipment, which restricts the development of the offshore wind power industry. The horizontal bearing characteristics of the pile foundation are greatly affected by the shallow soil, which is controlled by the resistance of the upper pile side soil. The shallow soil is mostly silt and silt soil, and the soil quality is relatively poor....

AI Technical Summary

Problems solved by technology

In actual engineering, the method of increasing the pile diameter is used to increase the horizontal bearing capacity of the pile foundation, which results in an increase in the production cost of the steel pipe pile and greatly increases the difficulty of construction

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