Building Construction
The additional piles which are driven to increase the capacity of supporting loads on vertical piles, are known

Raking piles
Sinking piles
Eccentric piles
Construction piles

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Building Construction
Auger boring

Is the most primitive method for making a hole in the ground
Is most economical up-to a depth of 5 meters
All of these
Is generally employed in cohesive and other self soils above water table

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