Rock-socketed single pile foundation through offshore wind power and construction method of rock-socketed single pile foundation

Abstract

The invention relates to a rock-socketed single pile foundation through offshore wind power and a construction method of the rock-socketed single pile foundation. The rock-socketed single pile foundation comprises a steel pipe single pile which is positioned in the center, wherein the lower end of the steel pipe single pile is inserted into a seabed, and the upper end of the steel pipe single pile is positioned above the sea level; a fan tower cylinder is mounted at the upper end of the steel pipe single pile, and a plurality of steel pipe grouting piles which are fixedly connected to the steel pipe single pile are arranged at intervals at the internal circumambient part or the periphery in the steel pipe single pile; the lower ends of the steel pipe grouting piles are inserted into the seabed, and the upper ends of the steel pipe grouting piles are positioned above the sea level; the inner parts of the lower ends of the steel pipe grouting piles are grouted with concrete socketed piles of which the lower ends penetrate through the lower ends of the steel pipe grouting piles to be embedded and fixed in a baserock layer of the seabed. According to the rock-socketed single pile foundation disclosed by the invention, the difficult problem that at current, in China, full cut-off sock-socketed construction of large diameter pile foundation cannot be realized is effectively solved, and besides, the horizontal load bearing capacity and the antidumping capacity of the pile foundation are improved; the dynamic response of infrastructures is reduced, the application scope of the single pile foundation is enlarged, and the single pile foundation disclosed by the invention has a high application value.

Description

technical field [0001] The invention relates to an offshore wind power rock-socketed single pile foundation and a construction method thereof. Background technique [0002] Due to the increasingly severe energy crisis and the aggravation of environmental pollution, the utilization of renewable energy has gradually become the focus of research and development. In recent years, onshore wind power has been developed on a large scale, but it has many shortcomings and limitations, so offshore wind power has begun to enter 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 stability, small sea surface roughness, small offshore wind turbulence intensity, small wind cutting edge, higher development efficiency, and no environmental pollution problems such as noise interference and landscape damage. , very suitable for large-scale development. [0003] The structural t...

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. Units of 5MW and above have been successfully developed and put into use. If the traditional single pile type is adopted, the diameter and wall thickness of the pile will increase significantly. Increased the cost and increased the difficulty of construction

At the same time, in some provinces such as Fujian, the offshore seabed cover is shallow. In order to meet the foundation bearing capacity, the pile foundation often needs to be rock-socketed. For large-diameter single piles, there is currently a lack of rock-socketing construction equipment, and it is difficult to realize large-diameter full-section rock-socketing.

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