A frozen soil creep model with strength attenuation |
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| Authors: | Xiaoliang Yao Jilin Qi Mengxin Liu Fan Yu |
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| Institution: | 1.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou,China;2.School of Civil and Transportation Engineering,Beijing University of Architecture and Civil Engineering,Beijing,China |
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| Abstract: | A frozen soil creep model with shear strength attenuation was proposed based on a soft soil creep model. K 0 compression and triaxial shear tests were conducted to obtain the model parameters. With triaxial creep tests, the performance of soft soil creep model was verified at first. It was shown that different creep stages can only be described separately, which was due to a constant failure line used in the model. After incorporating strength attenuation into the original model, relative position between stress point and failure line is time dependent, and the progressive development of creep strain from primary to tertiary stage can be captured reasonably. |
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