A four elements porous model to estimate the strength of unsaturated soils

Rojas, Eduardo; Zepeda, Alejandra Díaz; Pérez-Rea, María de la Luz; Leal, Jacqueline D. S.

doi:10.1007/s10706-009-9278-8

Cited by 7 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The probabilistic model used is a work developed and reported in Rojas, Zepeda, Pérez-Rea, Leal, and Gallegos (2009). It is a mathematical approach that allows us to express in probabilistic terms the distribution of pores in an infinitely large mesh.…”

Section: Probabilistic Model Of Rojas Et Almentioning

confidence: 99%

A computational approach to predict unsaturated soil phases

Arroyo

2023

JTD

View full text Add to dashboard Cite

The unsaturated fractions in a porous medium such as soil are the result of the process of natural humidity changes that occur in environments where both the temperature and the relative humidity of the environment are constantly changing. These processes, important in environmental geotechnics, need to be studied to predict the resistance and permeability that the porous medium may have under various scenarios. This article allows us to establish a computational model that allows us to predict the volumes of the unsaturated fraction. The predictions of the model and its contrast with the Rojas model allow us to conclude that the model can be used on a large scale to be used in engineering applications related to water flow in soils.

show abstract

Section: Probabilistic Model Of Rojas Et Almentioning

confidence: 99%

A computational approach to predict unsaturated soil phases

Arroyo

2023

JTD

View full text Add to dashboard Cite

show abstract

“…Furthermore, notice that theoretical bonds volume (bonds 1 and bonds 2) can be neglected from the total volume. More detailed descriptions concerning the entities used to model unsaturated soil structures can be found elsewhere [17,18].…”

Section: Tablementioning

confidence: 99%

Simulation of the shear strength for unsaturated soils

Arroyo

Rojas

Pérez-Rea

et al. 2013

Comptes Rendus Mécanique

View full text Add to dashboard Cite

The simulation of the hydro-mechanical behavior of unsaturated soils is becoming a subject of major importance in soil mechanics. However, unlike the laws governing the behavior of saturated soils, those used to describe the behavior of unsaturated soils still lack of simplicity for common engineering practice. This is why it is important to reconcile saturated and unsaturated soil mechanics and establish a unified theory. In this paper, we use the same strength equation of saturated soils in unsaturated materials and verify that a single failure surface is obtained for any value of suction in wetting and drying paths.

show abstract

“…Generally, two stress state variables, the net stress (mechanical stress) and the suction (suction stress) are considered in constitutive partially saturated soil modeling (Sheng 2011). The approaches differ, among other things, in treating these stress variables as independent variables (Fredlund et al, 1996; Sheng et al, 2008) or lumping both components to a single stress variable (Lu and Likos, 2006; Rojas et al, 2008; Lu et al, 2010). The latter approach has the fundamental advantage that classical soil mechanic principles can be applied to partially saturated soils.…”

mentioning

confidence: 99%

Comparison of Measured and Predicted Suction Stress in Partially Saturated Compacted Mixtures of Sand and Clay

Pourzargar

König

Heibrock

et al. 2014

Vadose Zone Journal

View full text Add to dashboard Cite

We conducted conventional triaxial and uniaxial tensile tests using partially saturated samples of an artiicial compacted mixture of kaolin and sand. Test results were analyzed by applying the effective stress principle in partially saturated soils. The results showed that suction stresses derived by triaxial and tensile tests were consistent at saturations >0.1, while the prediction of suction stress from the drying and wetting soil water characteristic curves of the mixture failed. Experimental results indicated that soil structure effects result in differences in upscaling the microscopic interaction effects to macroscopic strength at different suction levels. These soil structure effects seem to differ for shear strength and tensile strength..Abbreviations: SWCC, soil water characteristic curve.To date there is an ongoing discussion about how to describe the efect of soil-water interaction (in terms of suction) when dealing with the mechanical behavior, especially the shear strength, of partially saturated soils (e.g., Nuth and Laloui, 2008;Gens, 2010). Generally, two stress state variables, the net stress (mechanical stress) and the suction (suction stress) are considered in constitutive partially saturated soil modeling (Sheng 2011). he approaches difer, among other things, in treating these stress variables as independent variables (Fredlund et al., 1996;Sheng et al., 2008) or lumping both components to a single stress variable (Lu and Likos, 2006;Rojas et al., 2008;Lu et al., 2010). he latter approach has the fundamental advantage that classical soil mechanic principles can be applied to partially saturated soils. In addition, if the friction angle of the soil is independent of suction, all shear strength descriptions can be formulated either in the form of the independent or single variable approach. he growing number of laboratory tests indicates that the efective stress concept is suficient to describe macroscopic efects from soil-water interaction when dealing with shear-strength-related problems (Geiser et al.a unique closed-form equation to predict suction stress is still missing.We compared "measured" (derived by experimental data) and predicted (based on theory) shear strength of a partially saturated artiicial sand-clay mixture using the efective stress concept proposed by Lu and Likos (2006) and the closed-form equation for this stress from Lu et al. (2010). Conventional triaxial tests and uniaxial tensile strength tests were performed. he tests allowed us to measure failure under tensile to high compression stress conditions for air-dry to saturated conditions. Measured soil water characteristic curves (SWCCs) were used to predict suction stress and therefore the shear strength of the partially saturated soil.We irst introduce the efective stress concept and the methods used to derive and predict stresses resulting from the interaction of soil and water. his is not intended to be a Triaxial and uniaxial tensile tests were conducted using an artiicial mixture of kaolin and sand. Test results are...

show abstract

A four elements porous model to estimate the strength of unsaturated soils

Cited by 7 publications

References 25 publications

A computational approach to predict unsaturated soil phases

A computational approach to predict unsaturated soil phases

Simulation of the shear strength for unsaturated soils

Comparison of Measured and Predicted Suction Stress in Partially Saturated Compacted Mixtures of Sand and Clay

Contact Info

Product

Resources

About