Drained and Undrained Conditions
• Drained condition occurs when there is no change
in pore water pressure due to external loading.
• In a drained condition, the pore water can drain out
of the soil easily, causing volumetric strains in the
soil.
• Undrained condition occurs when the pore water
is unable to drain out of the soil.
• In an undrained condition, the rate of loading is
much quicker than the rate at which the pore water
is able to drain out of the soil.
• As a result, most of…
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