When the load on pile top is small, the later friction undertake mainly the load. With the increase of load on pile top, the resistance of pile tip develops gradually.
桩端力发挥的程度与桩顶荷载的大小相关，桩顶压力较小时，桩顶荷载主要由桩侧摩阻力承担，随桩顶压力的增大，桩端力将逐渐发挥。
Moreover, the tip resistance of pile groups is better used than the single pile.
并且，板下单桩及群桩的桩端阻力均能较充分的发挥出来。
The side friction is mobilized earlier than the tip resistance and the pile settlement is mainly the compression of pile shaft compression.
桩侧阻力先于桩端阻力的发挥，桩的沉降量主要是桩身压缩量。
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