Measurement and Uniform Formulation of Soil‐Water Characteristic Curve for Compacted Loess Soil with Different Dry Densities

Wang, Yu; Li, Tonglu; Ping, Li; Lei, Yu-Lu; Lawrence, David

doi:10.1155/2021/6689680

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…The knowledge of the behavior of the characteristic curve for unsaturated soil has been an important artifice for the analysis of the performance of its physical-hydric properties. It is also fundamental for several areas such as geotechnics, agriculture, hydrology, irrigation and fertilizer management, remediation of polluted areas, and many others, Silva, Libardi and Gimenes (2018); Ahmed et al (2021); Yan, Birle and Cudmani (2021); Wang et al (2021), in addition to its essential role in formulating constitutive equations applicable to unsaturated soils (Maranha Das Neves, 2016).…”

Section: Introductionmentioning

confidence: 99%

Characteristic Curves in Erodible Soils on a Slope in Cabo De Santo Agostinho/Brazil

Lafayette¹,

Coutinho²,

Cantalice³

et al. 2023

JMS

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Several studies focus on the characteristic curve of the soil, which plays a fundamental role in the mechanics of unsaturated soils and is also an important indicator of the physical quality. Therefore, the objective of this research was to determine the characteristic curve of the soil by the methods of Filter Paper, Richards Pressure Chamber, and Haines Funnel on an erodible slope in the Metropolitan Region of Recife, in the state of Pernambuco, Brazil. The curves were designed by the models of van Genuchten, Fredlund & Xing, Seki, and Dunner. In the suction x humidity ratios, during the wetting and drying processes, the experimental points were very close, making it difficult to define the hysteresis effect. The Richards Chamber and Haines Funnel methods allowed the complementation of the characteristic curve for low suction values, indicating that the techniques can be used simultaneously. The statistical analysis resulted in a numerical model with a significance value greater than 97%.

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Section: Introductionmentioning

confidence: 99%

Characteristic Curves in Erodible Soils on a Slope in Cabo De Santo Agostinho/Brazil

Lafayette¹,

Coutinho²,

Cantalice³

et al. 2023

JMS

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Influence of dry density and wetting–drying cycles on the soil–water retention curve of compacted loess: experimental data and modeling

Yuan,

Ni,

Della Vecchia

et al. 2024

Acta Geotech.

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In this paper, the EC-5 water sensor and the MPS-6 water potential sensor were used to measure water content and suction, respectively, to investigate the evolution of soil–water retention properties of compacted loess samples prepared at different dry densities and subjected to different numbers of wetting–drying cycles. The water retention data were integrated with a detailed microstructural investigation, including morphological analysis (by scanning electron microscopy) and pore size distribution determination (by nuclear magnetic resonance). The microstructural information obtained shed light on the double porosity nature of compacted loess, allowing the identification of the effects of compaction dry density and wetting–drying cycles at both intra- and inter-aggregate levels. The information obtained at the microstructural scale was used to provide a solid physical basis for the development of a simplified version of the water retention model presented in Della Vecchia et al. (Int J Numer Anal Meth Geomech 39: 702–723, 2015). The model, adapted for engineering application to compacted loess, requires only five parameters to capture the water retention properties of samples characterized by different compaction dry densities and subjected to different numbers of wetting–drying cycles. The comparison between numerical simulations and experimental results, both original and from the literature, shows that only one set of parameters is needed to reproduce the effects of dry density variation, while the variation of only one parameter allows the reproduction of the effects of wetting and drying cycles. With respect to the approaches presented in the literature, where ad hoc calibrations are often used to fit density and wetting–drying cycle effects, the model presented here shows a good compromise between simplicity and predictive capabilities, making it suitable for practical engineering applications.

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A simple method for predicting wetting-induced collapse behavior of compacted loess with various initial void ratios and moisture contents

Zhang

2022

Environ Earth Sci

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Measurement and Uniform Formulation of Soil‐Water Characteristic Curve for Compacted Loess Soil with Different Dry Densities

Cited by 4 publications

References 26 publications

Characteristic Curves in Erodible Soils on a Slope in Cabo De Santo Agostinho/Brazil

Characteristic Curves in Erodible Soils on a Slope in Cabo De Santo Agostinho/Brazil

Influence of dry density and wetting–drying cycles on the soil–water retention curve of compacted loess: experimental data and modeling

A simple method for predicting wetting-induced collapse behavior of compacted loess with various initial void ratios and moisture contents

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