RECOGNITION OF MODELS AND BACK ANALYSIS OF PARAMETERS FOR ARTIFICIAL FROZEN SOILS
人工冻土流变模型的识别与参数反演

Based on frozen soil creep tests,yield stress limit is approximately determined by means of experimental tautochrone at first. Then several visco-elastic and visco-elasto-plastic rheological models are established. The model parameter are feed back by the non-linear least square method. A fuzzy optimization model is developed under the principle of simplicity and accuracy. As a result,the optimal model is Burgers model under the lower stress level or H-H/N/S model under the higher stress level.