Offshore wind turbine single pile-suction cylinder combined foundation and construction method thereof

Abstract

The invention provides an offshore wind turbine single pile-suction cylinder combined foundation and a construction method thereof. The combined foundation comprises a single pile and a suction cylinder which are connected with each other vertically, a partition plate is arranged in the suction cylinder and divides the suction cylinder into an upper cylinder body and a lower cylinder body, the upper cylinder body is generally located above a seabed mud surface, and if the scouring depth is considered, the upper cylinder body can be sunken below the seabed mud surface when the calculated scouring depth is large, and a cover plate of the upper cylinder body is flush with the mud surface. The lower cylinder body is opened downwards and penetrates into a rock soil covering layer; and the bottom end of the single pile penetrates through the upper cylinder body and abuts against the partition plate. According to the method, the suction cylinder penetrates into a designated elevation throughintegral self-weight sinking of the single pile and the suction cylinder and suction cylinder negative pressure sinking, the inclination of the suction cylinder is monitored in the sinking period, leveling is conducted in time through a suction system, the problems of large-amplitude inclination, shaking and the like are avoided, and the problems that single pile rock-socketed construction is large in difficulty, long in construction period and high in cost are solved.

Description

technical field [0001] The invention relates to a novel combined foundation structure, in particular to an offshore fan single pile-suction cylinder combined foundation and a construction method thereof. Background technique [0002] As the renewable energy with the most exploitable value, wind energy has attracted worldwide attention. Offshore wind farms have good prospects for development because of their advantages such as high wind speed, long effective power generation time, no land occupation, and close distance to load centers. my country has a vast territory, long coastline, and abundant offshore wind energy resources. [0003] Offshore wind turbines must be supported on the offshore wind turbine foundation. Due to the complexity of the marine environment, the foundation cost of offshore wind turbines accounts for more than 20% of the cost of offshore wind farms. How to reduce the cost of wind turbine foundation, reduce the construction period of offshore wind tur...

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Problems solved by technology

[0005] Single pile rock-socketed construction is difficult, long construction period, high cost, and requires high requirements for rock-socketed equipment. At the same time, there are problems such as large equipment, less equipment, and high cost.

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