About piles

End Bearing Piles ::-

1:-In end bearing piles, the bottom end of the pile rests on a layer of especially strong soil or rock.

2:- The load of the building is transferred through the pile onto the strong layer.

3:-In a sense, this pile acts like a column.

4:-The key principle is that the bottom end rests on the surface which is the intersection of a weak and strong layer. The load therefore bypasses the weak layer and is safely transferred to the strong layer.

Friction Piles ::-

1:-Friction piles work on a different principle.

2:- The pile transfers the load of the building to the soil across the full height of the pile, by friction.

3:-In other words, the entire surface of the pile, which is cylindrical in shape, works to transfer the forces to the soil.

NOTE: In practice, however, each pile resists load by a combination of end bearing and friction