Non-Uniform Settlement of Compacted Earth Structures Caused by the Deformation Characteristics of Unsaturated Soil on Wetting

Kawai, Katsuyuki; Iizuka, Atsushi; Hayakawa, Eiji; Wang, Weichuan

doi:10.3208/sandf.47.195

Cited by 24 publications

(11 citation statements)

References 16 publications

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“…Ohno et al (2007) demonstrated the appropriateness of the S e hardening model by simulating experiments for unsaturated soils by Kato (1998). Void ratio, In this simulation, the soil-water retention characteristic curve (WRC) model proposed by Kawai et al (2007) is applied as 14.2.…”

Section: Yield Function Of S E Hardening Modelmentioning

confidence: 96%

Geotechnical Predictions and Practice in Dealing with Geohazards

Chu¹,

Wardani²,

Iizuka³

2013

Geotechnical, Geological and Earthquake Engineering

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Section: Yield Function Of S E Hardening Modelmentioning

confidence: 96%

Geotechnical Predictions and Practice in Dealing with Geohazards

Chu¹,

Wardani²,

Iizuka³

2013

Geotechnical, Geological and Earthquake Engineering

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“…Drying and wetting processes involve unique definitions of A α and B α as A D and B D , and A W and B W , respectively. The hysteresis between primary drying and wetting processes is interpolated using the scheme proposed by Kawai et al In the drying process, the SWCC is defined by applying the maximum degree of saturation

S_{rf}^{D}

as calculated from Equation . The SWCC for the drying process is therefore expressed as

\frac{S_{r} - S_{normalr 0}}{S_{rf}^{D} - S_{normalr 0}} bold= \frac{1}{1 + exp ([], A^{D} + B^{D} ln ((), s / s_{0}))} .

…”

Section: Mathematical Modelmentioning

confidence: 99%

Solute transfer during consolidation based on a solid‐fluid‐solute coupling model

Nomura

Kawai

Tachibana

et al. 2018

Num Anal Meth Geomechanics

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Summary The migration of contaminant through soil is usually modeled using the advection‐dispersion equation and assumes that the porous media is stationary without introducing a constitutive equation to represent soil structure. Consequently, time‐dependent deformation induced by soil consolidation or physical remediation is not considered, despite the need to consider these variables during planning for the remediation of contaminated ground, the prediction of contaminated groundwater movement, and the design of engineered landfills. This study focuses on the numerical modeling of solute transfer during consolidation as a first step to resolve some of these issues. We combine a coupling theory‐based mass conservation law for soil‐fluid‐solute phases with finite element modeling to simulate solute transfer during deformation and groundwater convection. We also assessed the sensitivity of solute transfer to the initial boundary conditions. The modeling shows the migration of solute toward the ground surface as a result of ground settlement and the dissipation of excess pore water pressure. The form of solute transport is dependent on the ground conditions, including factors such as the loading schedule, contamination depth, and water content. The results indicate that an understanding of the interaction between coupling phases is essential in predicting solute transfer in ground deformation and could provide an appropriate approach to ground management for soil remediation.

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“…Among this rare research, Kawai et al (2007) used the constitutive model by Karube & Kawai (2001) to study the non-uniform settlements induced by rainfall infiltration into a compacted earth fill of variable thickness. The authors highlighted the role played by simultaneous occurrences of elastic swelling and plastic compression during wetting (for shallow and deep soil elements respectively) in causing non-uniform settlements.…”

Section: Introductionmentioning

confidence: 99%

Rainfall-induced differential settlements of foundations on heterogeneous unsaturated soils

Le¹,

Gallipoli²,

Sánchez³

et al. 2013

Géotechnique

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This study stochastically investigates the rainfall-induced differential settlement of a centrally loaded, rigid strip foundation on an unsaturated soil with spatially varying values of either preconsolidation stress or porosity. The differential settlement (between the two foundation ends) is calculated at various times during rainfall by way of a coupled, hydro-mechanical, finite-element analysis. The Barcelona basic model describes the mechanical behaviour of the soil, and the van Genuchten relationships describe water retention and permeability. The variability of soil properties is modelled by means of random fields with spatial correlation in the framework of a Monte Carlo simulation. The study demonstrates that the occurrence of rainfall-induced differential settlements can be consistently analysed using concepts of unsaturated soil mechanics and random field theory. Results show that differential settlements can be vastly underpredicted (or even completely missed) if random heterogeneity and partial saturation are not simultaneously considered. The variation of differential settlements and their statistics during the rainfall depend on the magnitude of the applied load and the statistics of soil variability. Moreover, the transient phase of infiltration and a spatial correlation length equal to the width of the foundation pose the highest risk of differential settlement.

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Non-Uniform Settlement of Compacted Earth Structures Caused by the Deformation Characteristics of Unsaturated Soil on Wetting

Cited by 24 publications

References 16 publications

Geotechnical Predictions and Practice in Dealing with Geohazards

Geotechnical Predictions and Practice in Dealing with Geohazards

Solute transfer during consolidation based on a solid‐fluid‐solute coupling model

Rainfall-induced differential settlements of foundations on heterogeneous unsaturated soils

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