Abstract
Offshore piles are widely used as support and anchoring structures to provide stable support foundations. In this study, a novel torpedo pile is designed that combines water-jet technology and vibration loading to disturb/fluidize the cohesive sediments around the torpedo pile, reduce the resistance between the torpedo pile and cohesive sediments, and increase the efficiency of pile penetration and extraction. Experiments were conducted to investigate the characteristics of pile penetration and extraction in water-jet and vibration loading scenarios. The results indicated that the combined vibration and water jet method significantly reduced the resistance of the cohesive sediment to the torpedo pile during the pile penetration process, and the pile penetration speed increased as the water-jet pressure increased. The extraction efficiency of the torpedo pile was most significantly improved under the combined vibration and water jet method, and the maximum extraction force of the pile was reduced by approximately 78.2%.
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