One dimensional wave propagation analysis of an open-ended pipe pile with consideration of the excess pore pressure in soil plug

摘要

In this study, one-dimensional wave propagation analysis program KWaveFD is extended in order to incorporate the soil plug inside the open-ended pipe pile. When an open-ended pipe pile is driven into a saturated soil, high pore pressures are generated in the soil plug. The effect of generation of pore pressures in the soil plug is also considered in the extended KWaveFD. Furthermore, one-dimensional consolidation behaviour of the soil plug after pile driving is analysed by finite difference method, using the distribution of pore pressures at the end of the pile driving as initial condition. The behaviour of the pile under static loading can also be calculated using the increased inner-shaft resistance due to the consolidation of the soil plug. In this paper, results of numerical calculation of the above-mentioned behaviour of a driven open-ended pipe pile are demonstrated.