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Modelling the permanent strain of fine/coarse soil mixture with consideration of the effects of coarse grain content and suction by incorporating soil–water retention curve
https://orcid.org/0000-0001-7539-1518
Abstract Experimental observations showed that the permanent strain $${\varepsilon }_{1}^{p}$$ of fine/coarse soil mixture was significantly affected by the number of loading cycles N, deviator stress σd, coarse grain content fv and matric suction $$\psi$$. In this study, a fatigue model incorporating soil-water retention curve (SWRC) was developed, allowing the combined effects of N, σd, fv and $$\psi$$ on $${\varepsilon }_{1}^{p}$$ to be accounted for. Several studies were selected from literature to verify the proposed model. The model parameters were determined by fitting the variations of $${\varepsilon }_{1}^{p}$$ with N, σd, fv and $$\psi$$ under saturated condition, and then adopted to predict the results under unsaturated condition. Results showed that the proposed model was capable of describing $${\varepsilon }_{1}^{p}$$ in the case of plastic shakedown. Comparisons with three representative existing models show that the proposed model incorporating $$\psi$$ provides better predictions of $${\varepsilon }_{1}^{p}$$ than the existing models incorporating the water content, for both the case of constant dry density of fine soil fraction ρd-f and the case of constant dry density of mixture ρd. This was explained as follows: for the latter case, keeping the ρd constant, an increasing fv induced a decreasing ρd-f and hence a decrease of $$\psi$$. For both cases, the effect of ρd-f on $${\varepsilon }_{1}^{p}$$ was rather reflected by $$\psi$$ than by water content.
Modelling the permanent strain of fine/coarse soil mixture with consideration of the effects of coarse grain content and suction by incorporating soil–water retention curve
https://orcid.org/0000-0001-7539-1518
Abstract Experimental observations showed that the permanent strain $${\varepsilon }_{1}^{p}$$ of fine/coarse soil mixture was significantly affected by the number of loading cycles N, deviator stress σd, coarse grain content fv and matric suction $$\psi$$. In this study, a fatigue model incorporating soil-water retention curve (SWRC) was developed, allowing the combined effects of N, σd, fv and $$\psi$$ on $${\varepsilon }_{1}^{p}$$ to be accounted for. Several studies were selected from literature to verify the proposed model. The model parameters were determined by fitting the variations of $${\varepsilon }_{1}^{p}$$ with N, σd, fv and $$\psi$$ under saturated condition, and then adopted to predict the results under unsaturated condition. Results showed that the proposed model was capable of describing $${\varepsilon }_{1}^{p}$$ in the case of plastic shakedown. Comparisons with three representative existing models show that the proposed model incorporating $$\psi$$ provides better predictions of $${\varepsilon }_{1}^{p}$$ than the existing models incorporating the water content, for both the case of constant dry density of fine soil fraction ρd-f and the case of constant dry density of mixture ρd. This was explained as follows: for the latter case, keeping the ρd constant, an increasing fv induced a decreasing ρd-f and hence a decrease of $$\psi$$. For both cases, the effect of ρd-f on $${\varepsilon }_{1}^{p}$$ was rather reflected by $$\psi$$ than by water content.
Modelling the permanent strain of fine/coarse soil mixture with consideration of the effects of coarse grain content and suction by incorporating soil–water retention curve
https://orcid.org/0000-0001-7539-1518
Abstract Experimental observations showed that the permanent strain $${\varepsilon }_{1}^{p}$$ of fine/coarse soil mixture was significantly affected by the number of loading cycles N, deviator stress σd, coarse grain content fv and matric suction $$\psi$$. In this study, a fatigue model incorporating soil-water retention curve (SWRC) was developed, allowing the combined effects of N, σd, fv and $$\psi$$ on $${\varepsilon }_{1}^{p}$$ to be accounted for. Several studies were selected from literature to verify the proposed model. The model parameters were determined by fitting the variations of $${\varepsilon }_{1}^{p}$$ with N, σd, fv and $$\psi$$ under saturated condition, and then adopted to predict the results under unsaturated condition. Results showed that the proposed model was capable of describing $${\varepsilon }_{1}^{p}$$ in the case of plastic shakedown. Comparisons with three representative existing models show that the proposed model incorporating $$\psi$$ provides better predictions of $${\varepsilon }_{1}^{p}$$ than the existing models incorporating the water content, for both the case of constant dry density of fine soil fraction ρd-f and the case of constant dry density of mixture ρd. This was explained as follows: for the latter case, keeping the ρd constant, an increasing fv induced a decreasing ρd-f and hence a decrease of $$\psi$$. For both cases, the effect of ρd-f on $${\varepsilon }_{1}^{p}$$ was rather reflected by $$\psi$$ than by water content.
Modelling the permanent strain of fine/coarse soil mixture with consideration of the effects of coarse grain content and suction by incorporating soil–water retention curve
Su, Yu (author) / Cui, Yu-Jun (author) / Dupla, Jean-Claude (author) / Canou, Jean (author) / Duan, Shu-Qian (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Derivation of soil water retention curve incorporating electrochemical effects
| Springer Verlag | 2021