Large-diameter tubular pile cylindrical fan foundation structure and construction method

Abstract

The invention discloses a large-diameter tubular pile cylindrical fan foundation structure and a construction method. The wind turbine foundation structure comprises a large-diameter pipe pile, a pile shoe and a pre-stressed anchor cable, the pile shoe is connected to the bottom of the large-diameter tubular pile; a plurality of tubular pile preformed holes which extend in the axial direction of the large-diameter tubular pile and are through are formed in the large-diameter tubular pile, through pile shoe preformed holes are formed in the pile shoe, and the pile shoe preformed holes are communicated with the tubular pile preformed holes; the pre-stressed anchor cables are inserted into the pipe pile preformed holes and the pile shoe preformed holes; an anchor plate is arranged at the bottom of the pre-stressed anchor cable; concrete is poured into the tubular pile preformed hole and the pile shoe preformed hole; the lower end of the pre-stressed anchor cable, the anchor plate, the lower portion of the large-diameter pipe pile and the pile shoe are all anchored in a foundation. The structure that the large-diameter pipe piles are matched with the pre-stressed anchor cables is adopted, fatigue damage of steel bars and concrete is avoided, the crack resistance and durability of the foundation structure are improved, and the safety of the foundation structure is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and particularly relates to a large-diameter pipe pile cylindrical fan base structure and a construction method for soft soil foundations. Background technique [0002] With the goal of carbon peaking and carbon neutrality being determined and the implementation path gradually becoming clear, my country's energy low-carbon transformation has accelerated, renewable energy has been rapidly developed, and wind power has entered a period of larger-scale development and construction. At present, the areas with high wind speed and good wind resources are the first to have the conditions for grid parity. However, the basic selection and design of wind turbines, construction difficulty and construction period all have a decisive impact on the economics of wind power projects. Many projects near the break-even point, even Losses were incurred due to the cost and long construction period of f...

AI Technical Summary

Problems solved by technology

[0004] At present, the foundation of wind turbines mostly adopts interlocking pile cylindrical foundation, prestressed pier foundation and prestressed cylindrical foundation; the calculation scheme of pier foundation is adopted in the force mode, and the length is relatively short, and it is not suitable for interlocking construction or large opening construction. During the excavation construction, it is easy to cause damage to the soil or occlusal damage, and there are certain defects in the overall force

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