Question

When the sol is in the state of stress, it is said to be in _____________

(a) Constant state

(b) Plastic equilibrium

(c) Stress conditioned state

(d) Equilibrium condition

I got this question in unit test.

Question is taken from Tri-axial Compression Test topic in portion Shear Strength of Geotechnical Engineering I

Answer 1

Right option is (b) Plastic equilibrium

To explain: When the soil is in the state of stress defined by the equation σ1’= σ3’tan2 α’ + 2c’ tan α’ as principal stress relationship, it is said to be in plastic equilibrium.