Answer / xyz

The effective stress is reduced due to upward movement of
flow of water. When the head causing upward flow is
increased, a stage is reached when the effective stress is
reduced to zero. The condition so developed is known as
quick sand condition. Quick sand is not any special type of
sand, but it is a condition of zero effective stress in
cohesionless soils.

Answer / garmel shiney

quick sand is a colloidal hydrogel consisting of fine
granular matter ,silt and salt water.water circulation
underground can focus in an area with the optimal mixture
of fine sands and other materials such as clay.

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