Anti-corrosion method of offshore wind power foundation steel piles

Abstract

The invention belongs to the technical field of anti-corrosion of foundation steel piles and specifically relates to an anti-corrosion method of offshore wind power foundation steel piles. The methodcomprises following steps: S1: steel pile surface treatment: steel pile surface is treated with a blade or a high-pressure spray gun; S2: construction of viscoelastic anti-corrosive belt: an isolationfilm of viscoelastic anti-corrosive belt is uncovered and wrapped on the outer surface of a steel pile by means of spiral overlap joint; S3: construction of underwater solidify coating tape: a underwater solidify coating tape is immersed in water for 10s to 200s, and the immersion step can be skipped for operation parts in water, and the operation can be directly carried out; starting from one end, the cover tape is spirally wound around the outer surface of the steel pile to be treated with anti-corrosion treatment in a 1 / 2 overlap manner. The upper edge and the lower edge of the cladding band covering region should at least exceed the upper edge and the lower edge of the region where the viscoelastic anticorrosive tape is wound, or at the same time the interface between the bottom surface of the cap and the steel structure; S4: stretching and wrapping film construction: the end of the covering tape is temporarily fixed by a plastic stretch wrapping film.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion of foundation steel piles, and in particular relates to an anticorrosion method for foundation steel piles of offshore wind power. Background technique [0002] Seawater is a natural strong electrolyte solution with a salinity of 32-37‰ and a pH value of 7.9-8.4. It also contains a complex system of suspended sediment, dissolved gas, organisms, and decaying organic matter; typical by ISO-12944 Corrosive environment classification table, it can be seen that the typical corrosive environment is divided into 5 levels, and the ocean is the most corrosive environment; this is due to the high salinity, strong electrolysis ability, dissolved oxygen and the presence of organisms make the environment exposed to the marine environment The steel in the steel structure is electrochemically corroded with the surrounding medium; therefore, the steel column of the offshore electrical foundation must be ant...

AI Technical Summary

Problems solved by technology

[0005] Disadvantages: cofferdams must be set up, and the anti-corrosion materials used, such as coatings and paints, need to be constructed in a dry environment

[0007] Disadvantages: the sleeve must be prefabricated in advance, hoisting equipment is required on site, the installation period is also very long, and the cost is high

[0009] Disadvantages: petrolatum can only be used with water, not directly underwater, so it can only be operated during the low tide period of sea water, which has great limitations

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