Pile foundation-
It is a foundation system that transfers loads to a deeper and component soil layer.
When to use Pile Foundations
1. Inadequate Load carrying Capacity of Shallow Foundations
2. To Prevent Uplift Forces
3. To Reduce Excessive Settlement
Pile classification:-
Friction Pile – Load Bearing Resistance derived mainly from skin friction
End Bearing Pile – Load Bearing Resistance derived mainly from base
Well foundation-
Well foundation is a type of deep foundation which is generally provided below the water
level for bridges.
Caisson or well have been in use for foundations of bridges and other structures.
Caisson is water tight structure preferably made of wood ,steel , RCC constructed in
connection with excavation for the foundation of bridges, piers, in rivers, dock structures
Types of caissons-
1.Open caisson-
Single wall open caisson , cylindrical open caisson, open caisson with dredging wells
2. Box caisson
3. Pneumatic caisson
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