Soil Mechanics and Foundation
For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as

dry of OMC and wet of OMC
wet of OMC and wet of OMC
wet of OMC and dry of OMC
dry of OMC and dry of OMC where OMC is optimum moisture content

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

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

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Soil Mechanics and Foundation
Effective stress on soil

Decreases both voids ratio and permeability
Increases voids ratio and decreases permeability
Decreases voids ratio and increases permeability
Increases both voids ratio and permeability

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