Study on Soil Constitutive Modeling by Forward Construction Disturbance
When soft soil layers such as soft clay,silt,and water-rich sand layers are used as a foundation or roadbed,it is necessary to construct reinforcement.Soil strength is increased by cement slurry,solidified cementitious material mixing or grouting treatment.This construction disturbance process is a positive favorable disturbance.Based on the Desai disturbed state theory,the intact soil is described by the modified Cambridge model,dense soil is described by linear elastic one.The constitutive model is established which consider the positive construction disturbance effect to give the calibration method of the corresponding model parameters.Based on development platform of ABAQUS,the new constitutive model is developed again.The numerical simulation of triaxial drained test are carried out.Accord-ing to the comparison between the experimental and calculated data,the new constitutive model is effective and fea-sible.Therefore,a simple and practical modeling method to describe the positive disturbance of soil is provided based on the Desai perturbation state theory.
soft soil layerforward construction disturbanceconstitutive modelDesai disturbed state theorytri-axial testsecondary development
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