skin friction force

Measured Q-S curve are back figured by nonlinear optimization approach and model parameters are found simultaneously, then distribution of axial force and skin friction along pile are calculated.

通过非线性优化算法，拟合实测的Q—S曲线，可得到桩土系统的工程力学参数，并由此计算得到桩身轴力及侧摩阻力分布曲线。

Axial force transmission, distribution of skin friction, tip resistance of pile, as well as tress ratio between pile and soil are changing with pillow.

研究了褥垫层厚度变化对桩身轴力传递、桩侧摩阻力分布、桩端阻力发挥、桩土荷载分担及桩土应力比的影响。

The axial force of piles first increases with the depth and then decreases. The variation of negative skin friction with the depth of piles is nonlinear.

由于负摩阻力的作用，桩身轴力随着深度的增加先增大后减小，桩侧摩阻力沿深度呈非线性变化。