When does a quick sand condition is developed in soil?
-
A.
Head causing downward flow is decreased
-
B.
Head causing upward flow is increased
-
C.
Head causing upward flow is decreased
-
D.
Head causing downward flow is increased
Correct Answer:
B. Head causing upward flow is increased
Explanation:
A quicksand condition develops in cohesionless soils, such as fine sand, when upward seepage pressure equalizes the downward pressure exerted by the soil's submerged weight. This occurs when the head causing upward flow is increased to the point that the effective stress between soil particles is reduced to zero. In this state, the soil loses all shear strength and bearing capacity, behaving like a liquid and causing objects to sink. This phenomenon is often referred to as a boiling condition due to the visible agitation of the soil surface.
Click below to open Discussion & Feedback
0 Issues
Please
login to comment or Report Issues.