A probabilistic solid-porous model to determine the shear strength of unsaturated soils

Rojas, Eduardo; Horta, Jaime; López-Lara, Teresa; Guerrero, Juan Alfredo Hernández

doi:10.1016/j.probengmech.2011.03.001

Cited by 11 publications

(10 citation statements)

References 21 publications

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“…It is based on the behavior of the micro-structure and macro-structure expressed in terms of the description and evolution of the pore-size distribution. A suitable choice is a normal distribution function [21,22], hence, the pore-size distribution function V R (μ, σ ) depends only on the mean size μ and the standard deviation σ , of each entity.…”

Section: The Hydraulic Modelmentioning

confidence: 99%

“…5a). This is done by identifying those cavities that comply with the following rules that let pores saturate [22]: (a) its radius R must be smaller than the critical value R C given by the Young-Laplace equation, and (b) it must be connected to the bulk of water following a continuous path from the boundaries.…”

Section: The Hydraulic Modelmentioning

confidence: 99%

“…Rojas [22], considered the problem of evaluating the "average" stress induced by all these constituents over an elementary representative volume of soil containing packets of clay, silt and large grains distributed in a random fashion, they all immerse in a soil mass containing air and water phases. This analysis results in Eq.…”

Section: Evaluation Of Parameter χmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: The Hydraulic Modelmentioning

confidence: 99%

Section: The Hydraulic Modelmentioning

confidence: 99%

Section: Evaluation Of Parameter χmentioning

confidence: 99%

See 1 more Smart Citation

Fully coupled hydromechanical model for compacted soils

Arroyo¹,

Rojas²

2018

Comptes Rendus. Mécanique

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“…The parameters contained within the parentheses in Equation (2) depend on the distribution of water inside the soil; the way in which their value is computed is described elsewhere [12,13], for the sake of completeness we will roughly describe them herein.…”

Section: The Solid-porous Modelmentioning

confidence: 99%

An effective stress approach for hydro-mechanical coupling of unsaturated soils

2016

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The simulation of the mechanical and hydraulic behaviour of soils is one of the most important tasks in soil mechanics. It is inaccurate to consider that the behaviour of saturated and unsaturated soils as if their governing laws were utterly different, this last condition is not sufficient to do so. However, unlike the laws governing the behaviour of saturated soils, those used to describe the behaviour of unsaturated soils lack the simplicity and predictability associated to the complexity of the phenomena that occur within these porous media. This is why it is important to establish a unified soil mechanics theory to reconcile saturated and unsaturated soil mechanics. In the present work, we describe a simple analytical equation to obtain effective stresses for any type of soil. The equation is coupled to an elastoplastic constitutive model which is capable to reproduce the stress-strain relationship of soil taking into account the hydro-dynamic coupling.

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“…In order to solve these special engineering problems, many researchers performed many laboratory tests to study the effect of the wetting-drying cycle on the physical and mechanical properties of the rock mass, especially strength and deformation [8][9][10][11]. Summer and Loubser [12] studied the physical and mechanical properties of four groups of sandstone specimens with different water contents.…”

Section: Introductionmentioning

confidence: 99%

Effect of Wetting-Drying Cycle on the Deformation and Seepage Behaviors of Rock Masses around a Tunnel

Guo

Jing

et al. 2020

Geofluids

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Water inrush caused by the wetting-drying cycle is a difficult problem in tunnel excavation. To investigate the effect of the wetting-drying cycle on the stability of the tunnel surrounding rock, physical experiments and numerical simulations regarding the process of tunnel excavation with different wetting-drying cycle numbers were performed in this study. The evolutions of stress, displacement, and pore water pressure were analyzed. With the increase in cycle number, the pore water pressure, vertical stress, and top-bottom approach of the tunnel surrounding rock increase gradually. And the increasing process could be divided into three stages: slightly increasing stage, slowly increasing stage, and sharply increasing stage, respectively. The failure process of the surrounding rock under the wetting-drying cycle gradually occurs from the roof to side wall, while the baseplate changes slightly. The simulation results showed that the maximum principal stress in the surrounding rock mass of the tunnel increases, while the minimum principal stress decreases. Furthermore, the displacement of the rock mass decreases gradually with the increasing distance from the tunnel surface. By comparing the simulation results with the experimental results, well consistency is shown. The results in this study can provide helpful references for the safe excavation and scientific design of a tunnel under the wetting-drying cycle.

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A probabilistic solid-porous model to determine the shear strength of unsaturated soils

Cited by 11 publications

References 21 publications

Fully coupled hydromechanical model for compacted soils

Fully coupled hydromechanical model for compacted soils

An effective stress approach for hydro-mechanical coupling of unsaturated soils

Effect of Wetting-Drying Cycle on the Deformation and Seepage Behaviors of Rock Masses around a Tunnel

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