A novel unified model for volumetric hardening and water retention in unsaturated soils

Chen, Liuxin; Ghorbani, Javad; Zhang, Chunshun; Dutta, Troyee Tanu; Kodikara, Jayantha

doi:10.1016/j.compgeo.2021.104446

Cited by 22 publications

(14 citation statements)

References 89 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We use the model proposed by Chen et al [4], which is based on the effective stress concept and multi-surface plasticity, to obtain soil constitutive relations. The model is selected because of the following model features which considerably facilitate the numerical modelling for the IC process and the long-term performance of the compacted soils under repeated traffic loads: 1) Unified description of unsaturated soil behaviour for various soil types and degrees of saturation.…”

Section: Unsaturated Soil Mechanics Approachmentioning

confidence: 99%

An unsaturated soil mechanics approach for performance-based intelligent compaction

et al. 2023

Self Cite

View full text Add to dashboard Cite

Intelligent compaction involves using instrumented rollers to provide real-time monitoring of the compacted ground using sensors such as accelerometers and GPS. This technology has the potential to improve productivity and uniformity in construction but its advancement is currently impeded due toinaccurate estimation of the physical ground properties, such as dry density, and the absence of robust quantitative models to predict the effect of compaction on the long-term performance of unsaturated soils under repeated loads. In this study, the compaction of the soil layers and subsequent deformations under repeated traffic loads are simulated by using an advanced computational framework and model for unsaturated soils. By employing an effective stress concept, the presented computational approach allows a unified description of soils at various degrees of saturation. In addition, the model can capture plastic deformations at the initiation of loading and thereby offer accurate predictions of soil behaviour under cyclic loads. Several numerical examples will be provided to demonstrate how the initial states of compacted soils affect the compaction efficiency and the long-term performance of compacted soils.

show abstract

Section: Unsaturated Soil Mechanics Approachmentioning

confidence: 99%

An unsaturated soil mechanics approach for performance-based intelligent compaction

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…With reference to elastic response, the equation of the bulk modulus, K and shear modulus, G (based on the suggestions of (Taiebat and Dafalias, 2008) for fully saturated soils) are generalised to unsaturated states by using Bishop's effective stress (Chen et al, 2021, Ghorbani and as follows…”

Section: Constitutive Modelmentioning

confidence: 99%

Improving Efficiency, Stability, and Accuracy of Finite Element Solutions for Solving Dynamic Contact Problems Involving Unsaturated Soils

Ghorbani

Chen

Kodikara

et al. 2022

Challenges and Innovations in Geomechanics

Self Cite

View full text Add to dashboard Cite

The paper investigates the efficiency, stability, and accuracy of finite element solutions based on the mortar approach in solving dynamic contact problems that involve unsaturated soils. We employ a fully coupled finite element solution and a recently developed bounding surface model for describing the hydro-mechanical hysteresis of unsaturated soils. The paper discusses a key source of instability in numerical simulations of this class of problems which is stress overshooting. We evaluate the efficiency of a solution for this problem and discuss the impact of this solution on improving the accuracy and stability of numerical simulations. Numerical simulations are presented for verification and analysis of efficiency, stability, and accuracy.

show abstract

“…Based on the calibration results presented in figure (8), and according to the data presented in figures (9 and 10), it can be stated that parameters n and 𝛼 both increased as the density index I D augmented. Then, using the linear interpolation, presented by formulas (10) and (11), it was found that n = 8.51 and 𝛼=4.37, 𝛼 * = 𝛼 x Cu =6.992. In addition, the simulation results displayed in figure (11) were then compared with the test results.…”

Section: Validation Of the Modelmentioning

confidence: 99%

“…Then, using the linear interpolation, presented by formulas (10) and (11), it was found that n = 8.51 and 𝛼=4.37, 𝛼 * = 𝛼 x Cu =6.992. In addition, the simulation results displayed in figure (11) were then compared with the test results. This simple comparison showed that the simulation results were in good agreement with the test results, which validates the proposed model.…”

Section: Validation Of the Modelmentioning

confidence: 99%

See 1 more Smart Citation

An analytical model to predict water retention curves for granular materials using the grain-size distribution curve

Bouacida

Feia

Denine

et al. 2022

Studia Geotechnica Et Mechanica

View full text Add to dashboard Cite

The present work aims to propose a new analytical model intended to predict the water retention curves for granular materials based on data from tensiometric tests. Different analytical models have been used for the evaluation of soil water retention curves so far. It should be noted that the proposed model considers only one criterion in the selection of soils. This criterion is the physical property of particle distribution curve that can be used to determine the values of D50 and CU . In this study, the pore-access size distribution is investigated considering the effect of the coefficient of uniformity of sandy soils that were prepared with different density indexes (0.5, 0.7, and 0.9). Moreover, the proposed model equation is based on the physical properties of soil. This equation made it possible to describe the water retention curve and to estimate the pore-access size distribution without performing any experimental tests. The findings allowed asserting that the uniformity of the particle size curves corresponds to a good uniformity of the pore-access size distribution. In addition, it was revealed that the suction increased as the density index went up, which matches well with the experimental data. Moreover, it may clearly be noted that the distinctive retention properties of unsaturated soils can be observed on the abovementioned curves. Further, it was found that the ratio of the grain size over the pore-access size increased as the uniformity coefficient augmented.

show abstract

A novel unified model for volumetric hardening and water retention in unsaturated soils

Cited by 22 publications

References 89 publications

An unsaturated soil mechanics approach for performance-based intelligent compaction

An unsaturated soil mechanics approach for performance-based intelligent compaction

Improving Efficiency, Stability, and Accuracy of Finite Element Solutions for Solving Dynamic Contact Problems Involving Unsaturated Soils

An analytical model to predict water retention curves for granular materials using the grain-size distribution curve

Contact Info

Product

Resources

About