Elasto-Plasticity of Unsaturated Soils: Laboratory Test Results on a Remoulded Silt

Geiser, F.; Laloui, Lyesse; Vulliet, L.

doi:10.3208/sandf.46.545

Cited by 40 publications

(24 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8(c)) shows that the major suction-induced shrinkage of the sample occurs at suctions below the air entry value. These results are in agreement with the interpretation of suction-induced volume change given by Geiser et al (2006).…”

Section: Unsaturated Reconstituted Samplesupporting

confidence: 82%

Behaviour of Unsaturated Aggregated Soil in Oedometric Condition

Koliji

Laloui

Vulliet

2009

Soils and Foundations

View full text Add to dashboard Cite

Section: Unsaturated Reconstituted Samplesupporting

confidence: 82%

Behaviour of Unsaturated Aggregated Soil in Oedometric Condition

Koliji

Laloui

Vulliet

2009

Soils and Foundations

View full text Add to dashboard Cite

“…Concerning Sion silt [31], while the net stress interpretation, Figure 9(a), already evidences a narrow arrangement of lines, the effective stress version, Figure 9(b), tends to align even more the experimental points and sets the whole scattering much closer to the saturated CSL, accounting for its uniqueness. This encourages simplification of parameter determination, assuming that saturated shear parameters, namely the saturated angle of friction and cohesion, are sufficient to describe both saturated and partially saturated critical state behaviours, overcoming the difficulties linked to the suction-dependent cohesion observed in the (q-p net ) plane.…”

Section: Critical State Analysismentioning

confidence: 99%

“…From a standard elastic-plastic interpretation and on the basis of experimental observations [31] it is recalled that the latter effects are at the origin of the increase in preconsolidation pressure with suction, and under certain stress conditions, they are linked to the well-known wetting collapse.…”

Section: Coming Back To Bishop-type Effective Stressesmentioning

confidence: 99%

Effective stress concept in unsaturated soils: Clarification and validation of a unified framework

Nuth¹,

Laloui²

2007

Num Anal Meth Geomechanics

Self Cite

431

243

View full text Add to dashboard Cite

SUMMARYThe effective stress principle, conventionally applied in saturated soils, is reviewed for constitutive modelling purposes. The assumptions for the applicability of Terzaghi's single effective stress are recalled and its advantages are inventoried. The possible stress frameworks applicable to unsaturated soil modelling are reassessed in a comparative manner, specifically the Bishop's single effective stress, the independent stress variables approach and the generalized stress framework. The latter considerations lead to the definition of a unified stress context, suitable for modelling soils under different saturation states. In order to qualify the implications brought by the proposed stress framework, several experimental data sets are re-examined in the light of the generalized effective stress. The critical state lines (CSLs) at different saturation states tend to converge remarkably towards a unique saturated line in the deviatoric stress versus mean effective stress plane. The effective stress interpretation is also applied to isotropic paths and compared with conventional net stress conception. The accent is finally laid on a second key feature for constitutive frameworks based on a unified stress, namely the sufficiency of a unique mechanical yield surface besides the unique CSL.

show abstract

“…The suction dependency of the mechanical behavior of unsaturated soil has been discussed by several researchers (e.g., Fredlund et al, 1978;Cui and Delage, 1996; Toyota et al, 2003;Geiser et al, 2006). However, many of their studies were conducted under drained conditions for both the pore air and the pore water, i.e., constant suction conditions, or undrained conditions for only the pore water and drained conditions for the pore air, due to the di‹culty of measuring or controlling the air pressure.…”

Section: Introductionmentioning

confidence: 99%

Monotonic and Cyclic Behavior of Unsaturated Sandy Soil Under Drained and Fully Undrained Conditions

Kimoto

Oka

Fukutani

et al. 2011

Soils and Foundations

View full text Add to dashboard Cite

Changes in air pressure during monotonic and cyclic loading are in some cases important for the behavior of unsaturated soil. For example, in order to investigate the stability of embankments and slope failure during earthquakes, it is necessary to consider the eŠect of the pore air or the pore gas pressure as well as the pore water pressure and the interaction between the soil and the pore ‰uids. In the present study, we carried out a series of monotonic and cyclic loading tests on sandy soil used for the improvement of river embankments. The eŠects of the initial suction, the conˆning pressure, and the degree of compaction under fully undrained conditions, namely, constant water and constant air shearing tests, as well as under drained conditions for both air and water, were studied. For the stress variables of the unsaturated soil, the skeleton stress was used to describe the experimental results and was deˆned as the diŠerence between the total stress tensor and the average pore pressure of water and gas (Oka et al., 2010). From the monotonic and cyclic test results, we found that the stress-strain behavior of unsaturated sandy soil strongly depends on the initial suction, especially under fully undrained conditions, due to the diŠerence in pore pressures. In the cyclic loading tests under fully undrained conditions, the mean skeleton stress decreased due to the increase in air pressure and led to the failure of the specimen in the case of a lower level of initial suction. In addition, the test results exhibited the strain rate eŠect on the stress-strain behavior during cyclic loading under fully undrained conditions.

show abstract

Elasto-Plasticity of Unsaturated Soils: Laboratory Test Results on a Remoulded Silt

Cited by 40 publications

References 20 publications

Behaviour of Unsaturated Aggregated Soil in Oedometric Condition

Behaviour of Unsaturated Aggregated Soil in Oedometric Condition

Effective stress concept in unsaturated soils: Clarification and validation of a unified framework

Monotonic and Cyclic Behavior of Unsaturated Sandy Soil Under Drained and Fully Undrained Conditions

Contact Info

Product

Resources

About