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| RECOGNITION OF MODELS AND BACK ANALYSIS OF PARAMETERS FOR ARTIFICIAL FROZEN SOILS |
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Abstract 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.
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Received: 14 August 2002
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