Through GDS Multifunctional Static Triaxial Apparatus

partial drained triaxial tests on saturated sand are carried out by controlling the strain increment ratio of soil samples.Through analyzing the experimental results of excess pore pressure

effective stress paths and stress-strain relation

asymptotic properties of saturated sand are studied.Research indicates: when sand is loaded on ordinary triaxial conditions by keeping constant strain increment ratio

effective stress ratio of saturated sand also tends to be a constant and forms a asymptotic state.At the same time

the asymptotic stress ratio decreases with strain increment ratio increasing.Based on dilatancy property of soil

physics mechanisms of forming the asymptotic states are presented.Test results of asymptotic stress ratio of Beijing saturated sand under part drainage condition are given.