Generalized Terzaghi’s Effective Stress Equation for Unsaturated Soil: An Independent Phase Balance Approach That Considers a Pore Water Content Gradient

Figure 10

A system of two idealized spherical soil particles under unsaturated conditions including two subsystems: (a) a system where the pore space is filled with capillary water and pore air; (b) a subsystem where the pore space is filled with capillary water with a homogenized capillary water pressure; and (c) a subsystem where the pore space is filled with pore air with a homogenized pore air pressure.