A fully coupled finite element analysis of water-table fluctuation and land deformation in partially saturated soils due to surface loading

Kim, Jun‐Mo

doi:10.1002/1097-0207(20001130)49:9<1101::aid-nme1>3.0.co;2-k

Cited by 38 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Figure 4.9, when the water level is at 10 m above the bottom surface, the soil column is fully saturated, and hence the initial ground settlement is almost zero and the excess pore-water pressure at the top surface is 100 kPa. As shown in Figure 4.9, the dissipation of pore-water pressure at the bottom and the variation of the surface settlement with time from this study agree well with the results in Kim (2000). After about 100 min, the excess pore-water pressure decreases to nearly zero and the final settlement of the soil column is about 39 mm.…”

Section: Consolidation Of Unsaturated Soilsupporting

confidence: 88%

See 1 more Smart Citation

Coupled Hydro-Mechanical Analysis for Unsaturated Soil Slope

2016

Rainfall-Induced Soil Slope Failure

View full text Add to dashboard Cite

Section: Consolidation Of Unsaturated Soilsupporting

confidence: 88%

“…(2) deformation of soil skeleton; Downloaded by [McGill University] at 16:59 21 June 2016 and (3) variation of degree of saturation (Narasimhan & Witherspoon, 1977;Noorishad et al, 1982;Kim, 1996), and the governing equations for the coupled flow and deformation in unsaturated soils are expressed as follows (Kim, 2000):…”

Section: Effective Stress Approachmentioning

confidence: 99%

Coupled Hydro-Mechanical Analysis for Unsaturated Soil Slope

2016

Rainfall-Induced Soil Slope Failure

View full text Add to dashboard Cite

“…Today, numerical modeling of fluid‐saturated permeable materials is mostly performed using continuum mechanics methods (finite element and finite difference methods) . First of all, these methods allow the construction of various rheological (coupled and multiscale) models of solids to study the mechanical response of materials on different scales.…”

Section: Introductionmentioning

confidence: 99%

A coupled discrete element‐finite difference approach for modeling mechanical response of fluid‐saturated porous materials

Psakhie

Dimaki

Shilko

et al. 2015

Numerical Meth Engineering

View full text Add to dashboard Cite

Summary A model of fluid‐saturated poroelastic medium was developed based on a combination of the discrete element method and grid method. The developed model adequately accounts for the deformation, fracture, and multiscale internal structure of a porous solid skeleton. The multiscale porous structure is taken into account implicitly by assigning the porosity and permeability values for the enclosing skeleton, which determine the rate of filtration of a fluid. Macroscopic pores and voids are taken into account explicitly by specifying the computational domain geometry. The relationship between the stress–strain state of the solid skeleton and pore fluid pressure is described in the approximations of simply deformable discrete element and Biot's model of poroelasticity. The developed model was applied to study the mechanical response of fluid‐saturated samples of brittle material. Based on simulation results, we constructed a generalized logistic dependence of uniaxial compressive strength on loading rate, mechanical properties of fluid and enclosing skeleton, and on sample dimensions. The logistic form of the generalized dependence of strength of fluid‐saturated elastic–brittle porous materials is due to the competition of two interrelated processes, such as pore fluid pressure increase under solid skeleton compression and fluid outflow from the enclosing skeleton to the environment. Copyright © 2015 John Wiley & Sons, Ltd.

show abstract

“…Schrefler (1978, 1998) presented a coupled model to simulate the subsidence and the pressure decline in the considered area. Kim and Parizek (1999) and Kim (2000) presented a fully coupled numerical model for groundwater flow and soil deformation due to groundwater pumping. Gambolati et al (2000) analyzed the comparison of results obtained with the finite element of the coupled and uncoupled models, which indicated that pore pressure was rather insensitive to the coupling model within the pumped formation.…”

Section: Introductionmentioning

confidence: 99%

Simulation of fully coupled finite element analysis of nonlinear hydraulic properties in land subsidence due to groundwater pumping

et al. 2015

View full text Add to dashboard Cite

A fully coupled mathematical model of land subsidence caused by groundwater pumping was established based on the mechanics of porous seepage and the theory of fluid-solid interaction. The mathematical model employing the Galerkin finite element method was proposed to simulate the deformation dependencies of hydraulic properties due to the water pressure decrease in aquifers. This model has been verified by comparing with the known analytical solutions in the confined aquifer. Results show that the simulated drawdown and displacements match well with those of analytical solutions. To evaluate the nonlinear effects of hydraulic properties in the seepage and consolidation coupling phenomena, the numerical model is applied to an ideal three layers numerical experiment. The results show that the subsidence rate is faster than conventional groundwater theory when the nonlinear hydraulic properties (NHP) are considered in the coupled model. The reason is that the water level decline due to groundwater withdrawal induces the soil compression and the porosity and permeability decrease. Decrease of permeability in regions adjacent to the pumping well produces hydraulic gradient and seepage forces that may result in accelerated subsidence. Therefore, the effect of the NHP is an interaction process of pore water pressure and soil consolidation deformation and should not be ignored. Further studies of various hydrogeology problems are recommended to consider the heterogeneity concerning different stratigraphic condition in the field.

show abstract

A fully coupled finite element analysis of water-table fluctuation and land deformation in partially saturated soils due to surface loading

Cited by 38 publications

References 23 publications

Coupled Hydro-Mechanical Analysis for Unsaturated Soil Slope

Coupled Hydro-Mechanical Analysis for Unsaturated Soil Slope

A coupled discrete element‐finite difference approach for modeling mechanical response of fluid‐saturated porous materials

Simulation of fully coupled finite element analysis of nonlinear hydraulic properties in land subsidence due to groundwater pumping

Contact Info

Product

Resources

About