Building construction Foundation

Building construction

Foundation
2. Deep foundation

🔸 Pile foundation may be defined as a  column support type of a foundation, which may be cast in-situ or  Pre-cast.

🔸 Classification of pile based on the function

👉 Bearing piles - Penetrate through soft soil and their  bottom rest on a hard stratum.
 
👉 Friction piles - The frictional resistance is equal to load  coming on the piles

👉 Screw piles -Used for gravely ground sand, mixed gravel  ground

👉 Uplift piles - when the structure subjected to uplift 
pressure.

👉 Batter pile – To resist large horizontal or inclined forces

👉 Sheet pile -used as bulk heads or a impervious cutoff

🔸 Classification of pile based on materials and composition

👉 Cement concrete piles : Posses excellent compressive strength.
 
1) Precast

2) Cast-in-site 

3) Under reamed piles

👉 Timber piles - Small bearing capacity, not suitable for hard soil and economical
 
👉 Steel piles - With stand impact stresses and resist lateral 
forces

👉 Sand piles - Not suitable for loose or wet soils or where is  a danger of scour. Easy to construct and irrespective of  water table. 

👉 Composite piles - combination of two different materials are used to form composite file and suitable where the upper part of pile to project above the water table.


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