Method for preventing and controlling pile foundation washout of offshore oil platform

The invention discloses a method for preventing and controlling pile foundation washout of an offshore oil platform, which mainly relates to a method for preventing and controlling pile foundation washout of an offshore oil drilling jacket platform. The invention provides a method for preventing excessive exposure of the pile foundation when sand at the pile foundation of the jacket platform is moved to another place so as to reduce the platform washout detection times and improve the safety and stability of the platform, and further embedding methods for preventing and controlling the pile foundation washout are not needed. The technical scheme is mainly characterized in that: the sand is deposited at the bottom of the pile foundation under the condition of forming ring protection for the pile foundation; and under the condition of forming diversion of a diversion disc, the diversion directly acts on the sand flow at the pile foundation and weakens washout on the sand at the bottom of the pile foundation so