Grouting and bottom sealing method for foundation structure of offshore wind turbine jacket

Abstract

The invention discloses a grouting and bottom sealing method for a foundation structure of an offshore wind turbine jacket. The method adopts a circular bottom sealing steel plate, a stiffening plate, geotechnical cloth, a sealing cover, low-strength grouting materials and high-performance grouting materials to perform bottom sealing operation on the wind turbine jacket. The method comprises the following specific steps that firstly, the bottom sealing steel plate and the stiffening plate are welded into a steel pipe pile, then pile planting operation is carried out on the steel pipe pile, and then, the wind turbine jacket is inserted into the steel pipe pile, and finally, low-strength grouting materials and high-performance grouting materials are poured in sequence. According to the method, the bottom sealing steel plate is arranged in the steel pipe pile, so that the construction precision requirement is lowered, the problem of untight grouting and plugging is solved, meanwhile, the construction cost is saved, and the method has important significance in improving the construction efficiency of the offshore wind turbine jacket foundation and saving the cost.

Description

technical field [0001] The invention relates to the technical field of installation of offshore wind turbines, in particular to a method for grouting and bottom-sealing the basic structure of an offshore wind turbine jacket. Background technique [0002] At present, there are various structural forms of fan structures, which are suitable for different water depth conditions. When the water depth is about 35m, the jacket structure is more economical and reasonable. The connection between the jacket structure and the foundation is generally made by grouting. High-strength grouting material is poured into the circumferential gap between the jacket leg and the steel pipe pile, and the upper fan duct is fixed by using the bonding force between the grouting material and the steel pipe wall and the pre-welded shear key on the steel pipe wall. The load of the frame structure is transmitted to the foundation piles; according to the construction sequence of the jacket structure and st...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for grouting the bottom of the foundation structure of the offshore wind turbine jacket that can reduce the construction accuracy requirements, eliminate the problem of incomplete grouting and plugging, and save construction costs at the same time.

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