Ecological wind power pile foundation protection bottom structure and design method

Abstract

The invention discloses an ecological wind power pile foundation bottom protection structure and a design method, and belongs to the technical field of pile foundation bottom protection. The design method is characterized by comprising the steps that S1, basic data are obtained, and the basic data comprise the wave height H, the wavelength L, the water depth D and the foundation width d of a wind power pile foundation in the 0-10 m coastal near shore; S2, the relationship among the bottom flow velocity, the water depth and the block stone mass is obtained, the bottom flow velocity V is calculated according to the wave height H, the wavelength L and the water depth D; the mass W of a stabilizing block stone at different bottom flow velocities is calculated, and fitting is carried out on the relationship among the bottom flow velocity V, the water depth D and the block stone mass W; S3, a block stone protection range is determined; S4, the space between the block stones is filled with graded stones; S5, zostera marina is fixed to the graded stone; and S6, a reinforcing net is laid on the block stones, and the periphery of the reinforcing net is fixed. According to the technical scheme of the ecological wind power pile foundation bottom protection structure and the design method, the wind power pile can be prevented from being scoured by sea waves, meanwhile, the ecological wind power pile foundation bottom protection structure has the advantages of being ecological and environmentally friendly, and water quality can be improved and the ecological environment can be restored while scour is prevented.

Description

technical field [0001] The invention belongs to the technical field of pile foundation bottom protection, and in particular relates to an ecological type wind power pile foundation bottom protection structure and a design method. Background technique [0002] Under the action of ocean currents and waves, the foundation of large-diameter steel pipe piles for offshore wind turbines will cause strong water currents or high-speed rotating vortices in the local sea area around the piles. Scour the pit, weaken the bearing capacity of the pile foundation, and endanger the pile foundation. [0003] Regarding the anti-scouring technology of offshore wind power pile foundations, many scholars at home and abroad have done a lot of theoretical research work. Existing open technology has: (1) throwing and filling method is the most widely used method at present, mainly contains throwing and filling sandbags, throwing and filling stones etc. Prepare sand bags or graded gravel during con...

AI Technical Summary

Problems solved by technology

The throwing filling method has the characteristics of wide range of materials, low requirements for ship machinery, short construction time, and convenient construction, but its construction accuracy is poor, the loss is large, and the forming effect of the protective layer is poor.

(2) The geotextile method mainly includes sand quilt or interlocking row covering, especially the sand quilt method has many application examples in early domestic offshore wind farms. The sand quilt or interlocking row is processed and manufactured as a whole, and it is installed as a whole by hangers or laying ships Laying, the offshore construction period is relatively short, and the laying position and uniformity are relatively well controlled, but this method will cause no grass to grow in places with wind power pile foundations, and destroy the ecology of the seabed

However, due to the fast seabed flow and small sand particle size in some sea areas, it is impossible to form bionic grass areas with effective deposition coverage.

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