Lin Peiyuan, Ding Qingfeng, Chen Yang, et al. Dynamic characteristics of granite residual soil with different fine particle contents under long-term drying-wetting cycles[J/OL]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2026, 1-11.
DOI:
Lin Peiyuan, Ding Qingfeng, Chen Yang, et al. Dynamic characteristics of granite residual soil with different fine particle contents under long-term drying-wetting cycles[J/OL]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2026, 1-11.DOI: 10.11714/acta.snus.ZR20260139.
Dynamic characteristics of granite residual soil with different fine particle contents under long-term drying-wetting cycles
Reconstituted specimens with fine-particle contents of 10%, 30%, and 50% were prepared. Saturated consolidated undrained dynamic triaxial tests were then conducted after 1,10,50,and 100 drying-wetting cycles. The evolution of accumulated plastic strain, stress-strain hysteresis behavior, and resilient modulus was analyzed under different confining-pressure conditions. The results show that the dynamic response of the soil exhibits pronounced stage-dependent and non-monotonic characteristics under long-term drying-wetting cycles. For specimens with 10% and 30% fine-particle contents, the accumulated plastic strain increases from 1 to 10 cycles, decreases at 50 cycles, and increases again at 100 cycles. For specimens with 50% fine-particle content, relatively large deformation is observed after 10 drying-wetting cycles, whereas the accumulated plastic strain gradually decreases after 50~100 cycles. Both the area of the stress-strain hysteresis loops and the resilient modulus show stage-dependent variations associated with the drying-wetting history, indicating that structural disturbance, particle rearrangement, and subsequent re-stabilization jointly govern the evolution of the soil’s dynamic properties.
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