(1) Friction pile: In the ultimate bearing capacity state, the vertical load at the top of the pile is borne by the pile side resistance, and the pile end resistance can be ignored.

(2) End-bearing friction pile: In the state of ultimate bearing capacity, the vertical load on the pile top is mainly borne by the pile side resistance.

2. End bearing piles:

(1) end-bearing pile: In the ultimate bearing capacity state, the vertical load at the top of the pile is completely borne by the resistance at the end of the pile, and the side resistance of the pile can be ignored.

(2) Friction end bearing pile: In the state of ultimate bearing capacity, most of the vertical load on the pile top is borne by the resistance at the pile end.

Extended data

application area

1. When the upper soil layer is weak and cannot meet the requirements of bearing capacity and deformation, and there is a better soil layer below, pile will be used to cross the soft soil layer and transfer the load to the deeper hard soil layer.

2. There is no ideal bearing layer in a certain depth range, and the load is gradually transferred along the pile pole through the side friction of the pile.

3. The foundation needs to bear the upward force, and the pile relies on the negative friction around the pile pole to resist the upward force, that is, the "uplift pile".

4. When the foundation needs to bear the horizontal component, it can be borne by bending the straight pile.

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