A high-pressure water flushing device for pile legs of an offshore platform

Abstract

The invention discloses a high-pressure flushing device for an offshore platform pile leg. The high-pressure flushing device is suitable for flushing away barriers such as surrounding soil during offshore platform pile pulling. The device comprises a water suction pipe, a high pressure water pump, water outlet hoses, a hysteresis type double-path water pipe winding drum, pile leg internal water outlet pipes, pile shoe internal water outlet pipes and spray nozzles. According to the invention, water reaches the high pressure water pump through the water suction pipeline, great pressure and flow are generated through the effect of the high pressure water pump, water is introduced to the top of the pile leg through the water outlet hoses, the water outlet hoses are wound on the hysteresis type double-path water pipe winding drum, the hysteresis type double-path water pipe winding drum is correspondingly folded and unfolded according to the pull-out height of the pile leg, greater potential energy is generated after the water is introduced to the top of the pile leg through the hoses, and great impact force is generated through the pile leg internal water outlet pipes, the pile shoe internal water pipes and the spray nozzles; water flushing is continuously carried out during the integral pile pulling process to reduce the viscidity of soil adhered to the pile legs and reduce the friction force among the pile leg, pile shoe and soil, so that the pile pulling pressure is reduced, and finally, the quick and efficient pile pulling can be implemented.

Description

technical field [0001] The invention relates to a high-pressure water flushing device for pile legs of an offshore platform, which is used for flushing away surrounding soil and other obstacles when pulling out piles on the offshore platform. Background technique [0002] At present, the pile legs of offshore platforms are mostly cylindrical or square steel structures, and the lower part of the pile legs is based on pile boots. Generally, flushing devices are not required in foreign geology, but in China's coastal geology, the clay layer is thicker, and the operating locations are different. The properties of the soil are different, the stratum is complex, the geology is loose, the mud is deep when the piles are inserted on the platform, and the soil damaged by the piles is re-slurried and silted, forming a new attached soil and stabilizing on the pile legs. After a long period of consolidation, there will be Great intensity. When the pile boots are deep into the mud, the p...

AI Technical Summary

Problems solved by technology

Generally, the platform will be designed as a flushing system with pipes inside the pile legs, but the flow and pressure are difficult to quickly wash away the soil attached to the pile boots. Because the pressure is too small, sometimes it is easy to block the nozzle of the outlet pipe when inserting piles, and the operation is difficult. , it is difficult to achieve the effect of high-speed pile pulling

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