Soil Mechanics and Foundation
A grillage foundation

All of these
Is provided for heavily loaded isolated columns
Is treated as spread foundation
Consists of two sets of perpendicularly placed steel beams

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Soil Mechanics and Foundation
Quick sand is a

flow condition occurring in both cohesive and cohesionless soils
flow condition occurring in cohesive soils
flow condition occurring in cohesionless soils
type of sand

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Soil Mechanics and Foundation
If the water table rises upto ground surface, then the

total stress is reduced due to increase in pore water pressure only but effective stress does not change
effective stress is reduced due to increase in pore water pressure only but total stress does not change
effective stress is reduced due to decrease in total stress only but pore water pressure does not change
total stress is increased due to decrease in pore water pressure but effective stress does not change

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