Experimental Study on the Effect of freeze-thaw cycle on Silty Clay Stress_Strain Behaviour

2nd International Conference on Civil Engineering and Materials Science

Chen, Rong^1 ; Xue, Nan^1 ; Hao, Dong-Xue^1 ; Gao, Yu-Cong^1

School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin

132012, China^1

关键词: Axial strain;    Deviatoric stress;    Freeze-thaw cycles;    Freezing temperatures;    Silty clay;    Strain-softening;    Stress strain behaviours;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/216/1/012041/pdf
DOI  :  10.1088/1757-899X/216/1/012041

来源: IOP

【 摘 要 】

The area of seasonally frozen soil in China accounts for about 54% of the national territorial area. The property of seasonally frozen soil has a great influence on highway, railway and architectural foundation. The effect of freeze-thaw cycle for saturated silty clay in Northeast Area on stress-strain behaviour was investigated by triaxial test in this paper, where three different freezing temperature and five different freeze-thaw cycle times were considered. The results showed that silty clay exhibited strain softening characteristics for small number of freeze-thaw cycles, while strain hardening characteristics will appear with the increase in freeze-thaw cycles. The deviatoric stress-axial strain relationship shows the transitional form from strain softening to strain hardening. It will be helpful to understand the strain behaviour of soil under freeze-thaw cycle.