Annular combination type super-large diameter offshore wind power single pile foundation and construction technology thereof

Abstract

The invention relates to an annular combination type super-large diameter offshore wind power single pile foundation and a construction technology thereof. The annular combination type super-large diameter offshore wind power single pile foundation is characterized by comprising a first single pile and a second single pile which are arranged in a mutually sleeved mode, the first single pile and the second single pile are both steel pipe piles, and the two single piles are welded through multiple connection steel plates which are arranged between the single piles to form an annular whole. By means of the annular combination type super-large diameter offshore wind power single pile foundation, the problem of super-large diameter pile foundation construction is effectively solved, the horizontal bearing capacity and overturning resistant capacity of the pile foundation are improved, a dynamic response of the foundation structure is reduced, the application range of the single pile foundation is widened, and it is possible that a wind power generator with the capacity of 6 MW or 8 MW or even larger can adopt the single pile. Therefore, the annular combination type super-large diameter offshore wind power single pile foundation and the construction technology thereof have an extremely high actual engineering application value.

Description

Technical field: [0001] The invention relates to an annular combined ultra-large-diameter offshore wind power single pile foundation and a construction process thereof. Background technique: [0002] Due to the increasingly serious energy crisis and the aggravation of environmental pollution, the utilization of renewable energy has gradually become the focus of people's research and development. In recent years, onshore wind power has been developed on a large scale, but it has many disadvantages and restrictions. Therefore, offshore wind power has begun to come into people's attention with its unique advantages. The advantages of offshore wind power generation are: large storage capacity of offshore wind energy resources and more stable, small sea surface roughness, low intensity of offshore wind turbulence, small wind cutting edge, higher development efficiency, and no environmental pollution problems such as noise interference and landscape damage , very suitable for l...

AI Technical Summary

Problems solved by technology

Due to the relatively small overall stiffness, the displacement of the pile body is often large, and the structural dynamic response under the action of waves and wind loads is relatively large, which is prone to fatigue damage or even failure

With the large-scale development of offshore wind power, the single-unit capacity of wind turbines is increasing. Offshore wind turbines with 6MW, 8MW or even larger capacity have been successfully developed and gradually put into use. The traditional single pile type is adopted, and the diameter and wall thickness of the pile It will increase significantly, and its diameter may reach more than 10 meters, which not only increases the cost, but also due to the lack of super-large-diameter piling equipment, whether the construction can be implemented smoothly becomes the key to its application

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