Deformation of soft soil was impacted by it's two basic characteristics: the behaviors of rheology and structure.The two should be considered at the same time in calculating analysis.Based on the existing rheological model of soft soil,a viscoelastic-plastic-damage constitutive model considering the two behaviors was proposed.It can also quantitatively describe the gradual damage process of the undisturbed soil's structure and reflect the impact due to the initial damage caused by construction pretreatment ...