Building Construction
In places where the soil is soft and has small resistance to the flow of concrete, which one of the following types of piles, is used

Vibro pile
Pressure pile
Franki pile
Pedestal pile

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Building Construction
Raft foundations are used for:

Counter acting the hydrostatic effect
Providing increased area of foundation over poor bearing capacity of soil
All listed here
Spanning over small soft or loose pockets

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