How to define capacity of clay and sand for a Pile Foundation?

Pile 

How to define capacity of clay and sand for a Pile Foundation?

Generally, every type of soil has the ability to resist load that’s called bearing capacity. Every soil has different type of bearing capacity some are high like rocks some are very low like clay or loose sand.

But in case of piles, the capacity of soil around the pile does not really matter due to its very nature of how pile foundation system work.

The two main types of pile foundation are:

1-End Bearing Pile

The end bearing pile defined itself mean it rest on hard strata, its is either precast, or cast in situ pile made of reinforced concrete, Steel or timber that’s extends to the weak soil till it reaches a hard solid stratum usually rocks that’s it can rest on.

2-Friction pile

When no hard strata of soil layer available the friction pile will be recommended. When there are no hard strata available then we use friction piles which get its strength through the friction with the neighboring soil or layers. Length of friction piles depends on the soil which means softer the soil is, the length of pile will be more and vice versa.