AG真人国际

https://doi.org/10.1016/j.enggeo.2025.108402

*论文版权归原作者和出书方所有，，，，，，，本文仅为学习交流。。。

以下是对这项效果的简要先容：

Fig. 2. Characterization of tested saline soil samples: (a) particle size distribution curve; (b) mineral composition; (c) soluble ion components.

Fig. 3. Diagram of the sample preparation and experimental procedure: (a) electric hydraulic molding and demolding device for soil preparation; (b) remolded soil sample; (c) freeze-thaw equipment; (d) cooling method experiment; (e) nuclear magnetic resonance (NMR); (f) temperature-controlled dynamic triaxial system (DTS).

Fig. 4. Calibration of NMR signal amplitude (Mo) in accordance with Curie’s Law

Fig. 5. (a) The basic form of the Hardin-Drnevich hyperbolic model; (b) the calculation of the damping ratio (λ)

Fig. 6. The cooling curve of soil samples with water contents (w) ranging from 16 % to 20 %.

Fig. 7. Freezing of the pore water within (a) Macropores, Mesopores, Small pores; (b) Micropores; (c) critical freezing temperature of pore water in varying pores using the Gibbs-Thomson equation.

Fig. 8. The T₂ distribution curves of soil samples with water contents (w) of (a) 16 %, (b) 18 %, and (c) 20 % during the freezing process.

Fig. 9. Variations of unfrozen (a) bound, (b) capillary, (c) bulk water contents, and (d) the freezing speed (vf) of bound water in soils with water contents (w) of 16 %, 18 %, and 20 %.

Fig. 10. Schematic diagram of the pore water freezing sequence and the associated evolution of ice skeleton morphology.

Fig. 11. (a) The stress-strain curves; (b) E_d of soil samples with different water contents (w) at various temperatures (T); the variations in E_d with (c) T and (d)w; the variations in Freezing Strengthening Coefficient (FSC) of E_d with (e) T and (f) w.

Fig. 12. (a) The variation curves of G_d with strain; (b) G_dmax of soil samples with different water contents (w) at various temperatures (T); the variations in G_dmax with (c) T and (d) w; the variations in Freezing Strengthening Coefficient (FSC) of G_dmax with (e) T and (f) w.

Fig.13.The variation curves of λ within samples with varying water contents (w) at (a)0 ℃，，，，，，，(b)-2 ℃，，，，，，，(c)-5 ℃，，，，，，，and (d) -9 ℃.

Fig. 14. The variation curves of (a) ice saturation (?) and relative saturation (S_e); (b) ice saturation speed (?^,) with negative temperature(T).

Fig. 15. The variation curves of the Freezing Strengthening Coefficient (FSC) of (a) E_d and (b) G_dmax with the ice saturation (?) in soils with different water contents (w)

Fig. 16. Schematic diagram of the effect of ice skeleton morphology on the soil's elastic and shear properties during the freezing process.