Terzaghi's principle

Terzaghi's Principle states that when a rock is subjected to a stress, it is opposed by the fluid pressure of pores in the rock. Terzaghi's Principle states that when a rock is subjected to a stress, it is opposed by the fluid pressure of pores in the rock. More specifically, Karl von Terzaghi's Principle, also known as Terzaghi's theory of one-dimensional consolidation, states that all quantifiable changes in stress to a soil are a direct result of a change in effective stress. The effective stress σ ′ {displaystyle sigma '} is related to total stress σ {displaystyle sigma } and the pore pressure u {displaystyle u} by the relationship;