Three-cylinder fan foundation recycling construction method

Abstract

The invention belongs to the technical field of offshore wind power foundation recycling, and discloses a three-cylinder fan foundation recycling construction method. The method comprises the steps that the manner of conducting water injection pressurization on two single cylinders is adopted to enable a whole fan foundation to incline to the direction of another single cylinder, and then water pressure of the two single cylinders is released; the first is repeatedly conducted till the three single cylinders incline sequentially, water is simultaneously injected into the three single cylindersfor pressurization, and then the cylinder-type foundation is lifted; after the cylinder-type foundation is lifted to a certain height from the initial height, water injection is stopped, and air inflation is simultaneously conducted on the three single cylinders to enable the cylinder-type foundation is continuously lifted; after the air inflation amount meets the design requirement, if the cylinder-type foundation is kept lifting continuously, and then the cylinder-type foundation is lifted to the water surface; and if the cylinder-type foundation does not continuously lift, the cylinder-type foundation is lifted to the water surface through the up-pulling force of lifting ropes, and then recycling work of the three-cylinder fan foundation is completed. According to the three-cylinder fan foundation recycling construction method, integrated recycling of the foundation and a fan is achieved, and large construction equipment is not needed; and meanwhile, the construction economic efficiency is good, and the construction period is short.

Description

technical field [0001] The invention belongs to the technical field of recovery of offshore wind power foundations, and in particular relates to a construction method for recovery of foundations of three-cylinder wind turbines. Background technique [0002] Offshore wind power has the characteristics of large wind power, stable wind resources, and nearby consumption of power generation energy. In recent years, offshore wind power has been widely developed. From 2013 to 2017, the new capacity and cumulative capacity of offshore wind turbines in my country showed a trend of gradual expansion. In 2017, 319 new installed capacity were added, and the new installed capacity reached 1.16 million kilowatts, a year-on-year increase of 96.5%, and the cumulative installed capacity reached 2.79 million kilowatts. At present, the design service life of offshore wind power is about 20 years. After the service period is over, the wind power foundation should be demolished and upgraded or ...

AI Technical Summary

Problems solved by technology

The cost of dismantling construction and dismantling of offshore wind farms has attracted more and more attention. In 2017, DONG ENERGY dismantled 11 wind turbines at the Vindeby offshore wind farm that had been in operation for more than 25 years. This is also the first offshore wind farm in the world. Wind farm decommissioning, offshore wind farm decommissioning requires the removal of foundations, wind turbines and offshore substations from the sea, which is expensive to remove

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