If the pile is driven into consolidated soil and the settlement of the pile is greater than that of the soil, the pile is supported by the soil, and positive friction force is produced. Pile foundation is widely used in geotechnical design as a reinforcing structure. The response processes of the pile side friction force, the pile axial force, and the soil response under seismic load are also analyzed. In this paper, the nonlinear, explicit, and finite difference program FLAC3D, which considers the mechanical behavior of soil-pile interaction, is used to establish an underconsolidated soil-pile mode. However, many pile projects are located in earthquake-prone areas, which indicate the importance of determining the response of the pile-soil structure under seismic load. Previous studies have mainly focused on the interaction of pile-soil under static condition.
If the settlement of the soil is greater than the pile, the pile is pulled down by the soil, and negative friction force is produced. Piles are widely used as reinforcement structures in geotechnical engineering designs.
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