Analytical solution of 1D consolidation of unsaturated soil by mixed fluid method

Analytical solutions of equations,which described one-dimensional consolidation of unsaturated soil using mixed compressible fluid method,were educed.The effects of parameters of soil on one-dimensional consolidation of unsaturated soil were discussed based on the above analytical solutions.It is confirmed that the formula for evaluating the pore-water pressure in unsaturated soil by the method is almost identical to that of Terzaghi theory,which is often used in analysis of one-dimensional consolidation of saturated soil,except for the Bishop effective stress parameter which describe the effect of pore-air on pore-water in unsaturated soil.In the formula of computation of pore-air,there is not only Bishop effective stress parameter describing the effect of pore-water on pore-air,but also compressibility of the pore-air that affect the rate of consolidation of unsaturated soil.In all the factors that influence the rate of consolidation of unsaturated soil,the most important one is the seepage path of fluid.