Research of True Triaxial Test of Elastic Ratio and Posisson's Ratio of Silt Soil under A Special Stress Path

Keeping maximum principle stress and medium principle stress fixed and increasing minor principle stress is a potential stress path, such as the impounding of earth and stone dam and the backfilling of earthwork in practical projects, under which several groups of true triaxial tests about silt soil from Ningbo city are studied.The true triaxial test result indicates that the trend of elastic ratio and Poisson's rations is getting downwards with the increasing of minorprinciple stress.These phenomena and results are seldom considered in Duncan-Chang model applied widely in practical projects and finite-element method analysis.