The pile transfers the load of the building to the soil across the full height of the pile, by friction. The load therefore bypasses the weak layer and is safely transferred to the strong layer.įriction piles work on a different principle. The key principle is that the bottom end rests on the surface which is the intersection of a weak and strong layer. In a sense, this pile acts like a column. The load of the building is transferred through the pile onto the strong layer. In end bearing piles, the bottom end of the pile rests on a layer of especially strong soil or rock. There are two fundamental types of pile foundations (based on structural behaviour), each of which works in its own way. Pile foundations are capable of taking higher loads than spread footings. When a building has very heavy, concentrated loads, such as in a high rise structure, bridge, or water tank.This layer cannot support the weight of the building, so the loads of the building have to bypass this layer and be transferred to the layer of stronger soil or rock that is below the weak layer. When there is a layer of weak soil at the surface.Pile foundations are used in the following situations: PILE FOUNDATIONSA pile is basically a long cylinder of a strong material such as concrete that is pushed into the ground to act as a steady support for structures built on top of it.
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