Modeling the Dependency of Soil-Water Retention Curve on Volumetric Deformation

Rojas, Eduardo; Alegría, Omar Chávez; Arroyo, Hiram; López-Lara, Teresa; Guerrero, Juan Alfredo Hernández; Horta, Jaime

doi:10.1061/(asce)gm.1943-5622.0000678

Cited by 12 publications

(4 citation statements)

References 35 publications

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“…Many studies have identified optimal SWCC fitting models suitable for different regions and soil types. Rojas [29] proposed a porous solid model to simulate the influence of soil-water lag and volume deformation on SWCCs. Some studies used the VG and Gardner models to fit and analyze SWCCs for different soil types.…”

Section: Discussionmentioning

confidence: 99%

Soil-Water Characteristic Curves and Fitting Models of Collapsible Loess: A Case Study of Lanzhou, China

Zhao¹,

Zhang²,

Hu³

et al. 2022

Pol. J. Environ. Stud.

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The soil-water characteristic curve (SWCC) is an important hydrodynamic representation of soil and the basis for studying the water content of collapsible loess. The objectives of this study were to determine the water holding capacity of collapsible loess and the best fitting model of SWCC. We selected representative samples of collapsible loess in Lanzhou and measured the SWCCs. The SWCCs for soil samples varied with bulk density and particle size. The shapes were the same, but the volumetric water content (VWC) decreased as the suction increased. The suction of different soil layers tended to first decrease rapidly, then decrease more gradually and finally stabilize with VWC. The fitted VWC for the VG model was closer to the measured content, and the accuracy of the model was high. The VG-M (1-1/n, n) model was the best of the six models tested and was selected as the optimal model for fitting SWCCs, which will provide a theoretical basis for the accurate fitting of data of collapsible loess.

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Section: Discussionmentioning

confidence: 99%

Soil-Water Characteristic Curves and Fitting Models of Collapsible Loess: A Case Study of Lanzhou, China

Zhao¹,

Zhang²,

Hu³

et al. 2022

Pol. J. Environ. Stud.

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“…Once the PSD for both bonds and sites has been established, it is possible to introduce the hydro‐mechanical coupling by considering the shift of the initial SWRCs with the plastic volumetric strain of a sample that is being tested. This hydro‐mechanical coupling does not require any additional parameter or fitting procedure as described in Rojas et al The coupling process is based on the conclusions of some experimental results related to the variation of the PSD during volumetric deformation. These results show that macropores (including both macrosites and macrobonds) are responsible for most of the volumetric deformation of samples (Simms and Yanful,).…”

Section: Hydraulic Modelmentioning

confidence: 99%

A fully coupled simple model for unsaturated soils

Rojas

Horta

Pérez-Rea

et al. 2019

Num Anal Meth Geomechanics

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Summary Different phenomena influence the strength and volumetric behavior of unsaturated soils. Among the most important are suction hardening, hydraulic hysteresis, and the influence of volumetric strain on the soil‐water retention curves. Fully coupled hydro‐mechanical models require including all three phenomena in their constitutive relationships. Among these phenomena, suction hardening is the most influencing as it determines the apparent preconsolidation stress, the position of the loading‐collapse yield surface, and the shift of both the isotropic consolidation and the critical state lines. In this paper, a fully coupled hydro mechanical model is presented. It is based on the modified Cam‐Clay model but includes a yield surface with anisotropic hardening that takes account of the shift of the critical state line with suction. For highly overconsolidated materials, the sub‐loading surface concept has been included in order to increase the precision of the model for these materials. The shift of the retention curves produced by volumetric strains is simulated using a hydraulic model based on the grain and current pore size distribution of the soil.

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“…When the void ratio modifies due to stress increments, the values of parameters φ s , φ d , φ u , and S u r change [30]. Therefore, the values of V R for sites and bonds also change.…”

Section: The Hydraulic Modelmentioning

confidence: 99%

Fully coupled hydromechanical model for compacted soils

Arroyo¹,

Rojas²

2018

Comptes Rendus. Mécanique

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To accomplish a proper conception and further modeling of the mechanical behavior of soils, observations at the micro and macro scales need to be merged. The authors believe that the link between scales can be achieved using the effective stress concept. In this paper, we present a model that quantifies the air and water volumes contained within the pores of a solid when their pore pressure is varied. The macroscopic consequences of this are expressed in terms of a single stress that is used to formulate a simple elastoplastic constitutive model to predict volume strains and shear strength of soils.

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Modeling the Dependency of Soil-Water Retention Curve on Volumetric Deformation

Cited by 12 publications

References 35 publications

Soil-Water Characteristic Curves and Fitting Models of Collapsible Loess: A Case Study of Lanzhou, China

Soil-Water Characteristic Curves and Fitting Models of Collapsible Loess: A Case Study of Lanzhou, China

A fully coupled simple model for unsaturated soils

Fully coupled hydromechanical model for compacted soils

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