The vertical load transmission mostly depends on the side friction of pile, and there is an optimal range of depth for side friction.
其竖向荷载主要依靠桩侧摩阻力进行传递，桩侧摩阻力的发挥存在最佳深度范围。
The performance of various of cable conduits is analyzed. The inspection of cable conduits and test of friction coefficient is described. The buried depth of cable conduits is calculated.
对各种电缆导管的性能进行了分析，叙述了电缆导管的检验以及摩擦系数的测试，并对电缆导管的埋地深度进行了计算。
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。
应用推荐