A hysteretic hydraulic constitutive model for unsaturated soils and application to capillary barrier systems

Scarfone, Riccardo; Wheeler, Simon J.; Lloret-Cabot, Martí

doi:10.1016/j.gete.2020.100224

Cited by 9 publications

(13 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This procedure which results from consecutively applying different experimental techniques to the same soil specimen enables a large number of tests and is not excessively time-consuming, so it is suitable to correctly manage the inherent variability of the considered soils. Indeed, the available hysteretic models in the literature and those implemented in commercial codes were conceived for sedimentary soils and generally validated on artificial samples [5,11,60,64]. Here, the model is calibrated and validated on natural undisturbed soils samples that are characterized by macro-pores, i.e., a meta-stable structure.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic hysteresis of natural pyroclastic soils in partially saturated conditions: experimental investigation and modelling

et al. 2021

View full text Add to dashboard Cite

In many geotechnical applications, especially in the study of weather-induced landslides, a reliable soil hydraulic characterization in unsaturated conditions is required. Currently, the experimental techniques that neglect the hydraulic hysteresis represent the greatest limitation to landslide forecasting. In this paper, a procedure to obtain an unsaturated soil hydraulic characterization on natural pyroclastic samples is proposed and verified. The approach enables the evaluation of the soil hydraulic properties along the main drying path and wetting/drying cycles to fully quantify the effects of the hydraulic hysteresis. Pyroclastic soil samples collected at a test site at Mount Faito in the Campania region (southern Italy) were tested. The experimental investigation consisted of a sequence of testing phases: a constant-head hydraulic conductivity test, a forced evaporation test followed by several wetting–drying cycles, and a drying test in a pressure plate apparatus. The hysteretic model proposed by Parker and Lenhard (1987) was adopted to fit the data, while inverse modelling of the forced evaporation tests allowed to derive the model parameters. Therefore, the main drying and wetting branches and the soil response to drying and wetting cycles from any reversal point were reproduced with the model, which suitably described the hysteretic behaviour of the pyroclastic soil under all conditions and along all paths.

show abstract

Section: Introductionmentioning

confidence: 99%

Hydraulic hysteresis of natural pyroclastic soils in partially saturated conditions: experimental investigation and modelling

et al. 2021

View full text Add to dashboard Cite

show abstract

“…where S r,0 is the minimum degree of saturation; s eq,des is the suction at the beginning of desaturation and a, n and m are fitting parameters for this non-hysteretic SWRC. Scarfone et al 50 showed that SWRC hysteresis may affect the hydraulic performance of a capillary barrier, but is omitted here for simplicity.…”

Section: Hydraulic Soil Propertiesmentioning

confidence: 99%

Numerical investigation of the performance of engineered barriers in controlling stormwater runoff

Petalas

Tsiampousi

Zdravković

et al. 2022

Geomechanics for Energy and the Environment

View full text Add to dashboard Cite

“…Likos and Jaafar 29 analyzed the snap-off behavior of meniscus at the pore scale, introducing a SWRC model describing hydraulic hysteresis. Similarly, Ranaivomanana et al 30 developed a pore network model considering pore space structure for SWRC hysteresis, and Scarfone et al 32 investigated scanning behavior F I G U R E 2 Development process of the meniscus with matric suction (Childs, 1969). 35 using a boundary surface approach.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the ink‐bottle effect‐dependent SWRC model, there are also various hysteresis models that rely on distinct physical mechanisms 27–34 . For example, Einav and Liu 28 proposed a non‐equilibrium model based on hydrodynamics to explain soil water‐retention hysteresis.…”

Section: Introductionmentioning

confidence: 99%

Modelling the evolution of water retention hysteresis loops during soil deformation based on the ink‐bottle effect

Chen,

Zhou,

Liang

2024

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

The ink‐bottle effect, resulting from the heterogeneous pore structure, plays a significant role in the hydraulic hysteresis of water retention behavior. Experimental evidence indicates that volumetric deformation extensively influences the hysteresis characteristics of the soil‐water retention curve (SWRC). This paper presents a physical–based model that aims to simulate the contraction of the hysteresis loop in the SWRC during soil compression by considering the evolution of the ink‐bottle effect. Within the proposed model, it is assumed that the suction increment is consumed in two distinct manners: to overcome the ink‐bottle effect and to alter soil saturation. As soil undergoes compression, the ink‐bottle effect weakens, resulting in a reduced proportion of suction consumed in counteracting this effect. To quantitatively describe the impact of ink‐bottle effect evolution on SWRC hysteresis, a novel concept known as hysteresis potential is introduced, which is defined as the difference in natural logarithmic values of suction between the drying and wetting curves at a given saturation. Finally, the proposed model was validated using five sets of experimental data, affirming its capability to capture the hysteresis loop evolution in SWRC attributed to the weakening of the ink‐bottle effect during soil compression.

show abstract

A hysteretic hydraulic constitutive model for unsaturated soils and application to capillary barrier systems

Cited by 9 publications

References 44 publications

Hydraulic hysteresis of natural pyroclastic soils in partially saturated conditions: experimental investigation and modelling

Hydraulic hysteresis of natural pyroclastic soils in partially saturated conditions: experimental investigation and modelling

Numerical investigation of the performance of engineered barriers in controlling stormwater runoff

Modelling the evolution of water retention hysteresis loops during soil deformation based on the ink‐bottle effect

Contact Info

Product

Resources

About