Design and Research on Internal Mud Discharge device of Jacket Platform Legs

摘要

During the disposal of the abandoned jacket platform, all steel piles within 4 meters below the mud surface of the seabed must be removed. In the process of disposing of steel piles using the internal cutting method, it is necessary to drain the mud inside the legs. Aiming at the characteristics of driven pile foundation, the article designs a set of mud discharge device that is cleaned by water jet inside the pile leg. According to the basic design requirements of the device, the parameter design of the device is completed by using water jet and pipeline transportation theory. Using computer simulation analysis method, the influence of jet pressure and jet distance on jet effect is studied. The research results show that in a submerged environment, the flow velocity of the water jet decays very obviously, but the effective area of the jet increases with the increase of the jet distance. The research results can provide a theoretical basis for the design and use of the water jet dredging device in the leg.