A recovery construction method for the foundation of a four-barrel fan

Abstract

The invention belongs to the technical field of offshore wind power foundation recycling, and discloses a construction method for recovering the foundation of a four-cylinder wind turbine. Firstly, the entire fan foundation is tilted to the direction of another single cylinder by injecting water into three single cylinders, and then released The water pressure of the three single cylinders is repeated in this way to make the four single cylinders incline in turn, and then inject water into the four single cylinders at the same time to make the cylindrical foundation rise; after the rising height of the cylindrical foundation from the initial height reaches a certain requirement, Stop water injection, and pump air to the four single cylinders at the same time to make the cylindrical foundation continue to rise; after the air pumping volume meets the design requirements, if the cylindrical foundation continues to rise, wait until the cylindrical foundation rises to the water surface; if the cylindrical foundation is no longer If it continues to rise, the cylindrical foundation will rise to the water surface through the pulling force of the suspension rope, thus completing the recovery work of the four-cylinder fan foundation. The invention realizes the integrated recovery of the foundation and the fan, does not require large-scale construction equipment, and has good construction economy and short construction period.

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 four-barrel 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 eco...

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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