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该文采用非线性大变形有限元方法,考虑相应的边界条件,建立了粉土中刚性桩贯入机理分析模型,研究了此类软土中刚性桩贯入的作用规律。结果表明,刚性桩贯入粉土时,桩端处径向应力最大,沿水平向逐渐减小,应力泡范围为6倍桩径,桩端以下径向应力迅速递减;当桩端到达该深度之前,竖向是加载的;而当桩继续向下贯入时,竖向是卸载的;贯入阻力沿深度持续增大,地表隆起位移最大值发生在桩侧处且沿径向迅速递减,水平向影响距离为4D。
In this paper, the nonlinear large deformation finite element method is adopted. Considering the corresponding boundary conditions, the analysis model of penetration mechanism of rigid pile in silt is established, and the law of penetration of rigid pile in such soft soil is studied. The results show that when the rigid pile penetrates into the silt, the radial stress at the pile tip is the largest and gradually decreases along the horizontal direction. The stress bubble range is 6 times the pile diameter, and the radial stress below the pile tip decreases rapidly. When the pile reaches the depth The vertical was unloaded; the penetration resistance continued to increase along the depth, the maximum value of ground surface uplift displacement occurred at the side of the pile and decreased rapidly along the radial direction, Horizontal impact distance of 4D.