On the basis of a series of indoor shear stress relaxation tests for Nanning unsatruated manipulated expansive soils,shear stress relaxation characteristics of the unsaturated manipulated expansive soils under the condition of direct shearing were researched.The results show that shear stress relaxation curves fall into non-complete decay type under different water content,and the shear stress gradually decreases and tends to stable values.The relaxation curves can be divided into obvious three stages： accelerate relaxation stage,uniform speed...
