Quicksand condition occurs when seepage pressure, which acts in the upward direction, overcomes the downward direction pressure due to weight of soil, and the sand grains are forced apart. The result is that the soil has no capability to support a load. ... The soil behaves as a liquid having no shear strength.

What is quick sand condition?

How Quicksand Condition Occurs? Quicksand condition occurs when there is a seepage pressure, this acts in the upward direction, while overcoming the downward direction pressure, this is due to the submerged weight of the soil, and here the sand grains are forced out apart.

When the quick sand condition is developed in soil?

The quick condition of soil is the condition when the upward water pressure gradient and water flow reduce the effective stress, i.e., cohesiveness of the soil. Sandy soils may lose their shear strength, and the soil may behave as a fluid‌. Cohesive soils may produce cracks with water seepage.