Self-washing pile shoe for pile leg and washing method

Abstract

The invention provides a self-elevating platform pile-washing pile shoe. The self-elevating platform pile-washing pile shoe comprises a pile shoe welded to the bottom end of a pile leg. The pile shoecomprises an upper pile shoe, a transition plate, a lower pile shoe and a positioning plate from top to bottom. Spiral reinforcing ribs are arranged in the pile shoe. A plurality of bumps are arrangedon the outer side of the pile shoe along the spiral reinforcing ribs. A cavitation jet flow nozzle is arranged on each bump. A sealing plate is mounted on the inner side of each bump. Sequence valvesare mounted on the sealing plate. A water storage cabin is arranged in the pile shoe. The water outlet of the water storage cabin communicates to the sequence valves through a pipeline. The self-elevating platform pile-washing pile shoe provided by the invention has the visbreaking adsorption characteristic by adopting a shape of back bumps like dung beetles. The cavitation jet flow nozzles are assembled on the bumps, so that soil bodies on the surface of the pile shoe are more easily washed when the pile is washed, and the pile shoe is more easily pulled out. The paths of the spiral reinforcing ribs are Archimedes spirals, so that the pile shoe has a better anti-pressure ability transversely and longitudinally.

Description

technical field [0001] The invention relates to a self-piercing spud can for pile legs, which belongs to the technical field of offshore platforms. Background technique [0002] The jack-up platform is mainly composed of a platform part and a support part. The support part mainly includes spud shoes and pile legs. Stability during stance. Therefore, the spud can structure is an important component to ensure the safety of the platform. [0003] Existing spud cans are generally circular, rectangular or polygonal in shape. During the insertion and extraction process, the hard clay on the seabed has a greater adsorption force on the spud cans. The longer the insertion and extraction time, the higher the buoyancy requirements of the platform, and the corresponding increase in the difficulty of insertion and extraction. Therefore, a flushing system is required to assist in insertion and extraction. It is labor-intensive to flush the hard clay with special nozzles, and the layou...

AI Technical Summary

Problems solved by technology

During the insertion and extraction process, the hard clay on the seabed has a greater adsorption force on the spud cans. The longer the insertion and extraction time, the higher the buoyancy requirements of the platform, and the corresponding increase in the difficulty of insertion and extraction. Therefore, a flushing system is required to assist in insertion and extraction. It is laborious to flush the hard clay with special nozzles, and the layout of the pile flushing pipes is complicated. During use, branch pipes and main circuit pipelines are often blocked by seabed soil, which leads to the failure of the pile flushing system and increases the difficulty of flushing piles.

During the piling process, the spud cans bear both longitudinal and lateral pressure on the seabed, and the existing rib structure inside the spud cans is insufficient in resisting the pressure in two directions at the same time

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