基于改进多层压实法的沉桩施工离散元分析OA北大核心CSTPCD

To investigate the influence of pile driving construction on the displacement and stress of foundation soil from a micro-scale perspective,the micro-parameters of foundation soil were calibrated,and a numerical simulation of pile driving construction was carried out using the discrete element method.The study results indicate that pile driving causes lateral displacement and bulging of the soil around the pile.As the pile driving depth increases,the extent of soil bulging around the pile continues to expand,and both the contact force within the foundation soil and the resistance at the pile end increase,with the growth rate being fast initially and then slowing down.Pile driving construction significantly impacts the lateral stress of the soil around the pile,with the location of the maximum lateral stress being closely related to the pile driving depth.As the horizontal distance between the foundation soil and the pile increases,the influence of the pile sinking construction on the vertical stress of the soil around the pile is gradually weakened.The research results provide reference for pile foundation construction and discrete element simulation.