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Microstructure Damage Behaviour and Change Characteristic in the Frozen Soil Creep Process

Zhang Changqing, Wei Xuexia and Miao Tiande( State Key Laboratory of Frozen Soil Engineering, LIGG, CAS, 730000; Department of Mechanics, Lanzhou University, 730000)  
Based on the data of artificial frozen soil and polycrystalline ice in uniaxial creep tests and the result of structure duplication electronmicroscope, this paper discussed the microstructure damage behaviour and change characteristic of frozen soil in the creep process. The test result showed that the creep stress level is a determinant factor of controlling damage behaviour. The study advanced the evidence for building the damage theory of frozen soil.
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