Prediction of Long Term Capacity using Dynamic Testing for Underwater Skirt Pile Foundation

This paper presents the application of HSDT to dynamically monitor the underwater pile foundations of the PY34-1 CEP Jacket in South China Sea. The eight-legged CEP Jacket, standing in a water depth of approximately 190.2m, is secured to the seafloor with 16×ø108" (2743mm)×148.3m pipe piles. HSDT has been used to measure soil resistance at the end of initial driving and during restrike driving at different waiting time periods. Studies on the SRD have been performed to predict LTSR and establish the relationship between LTSR and SRD in this area, which can be used to optimize future design and driveability analysis.