Consolidation-Induced Contaminant Transport in Multi-Layer Soils

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

This paper presents a numerical investigation of the effects of large strain consolidation on contaminant transport in multi-layer soils. Numerical simulations were conducted using the CST3 model, which accounts for one-dimensional coupled large strain consolidation and contaminant transport in saturated multi-layer porous media. The consolidation algorithm accounts for vertical strain, soil self-weight, general constitutive relationships, relative velocity of fluid and solid phases, changing compressibility and hydraulic conductivity during consolidation, unload/reload, time-dependent loading, time-dependent boundary conditions, external hydraulic gradient, variable preconsolidation stress profiles, and multiple soil layers with different material properties. The contaminant transport algorithm accounts for advection, diffusion, mechanical dispersion, linear and nonlinear sorption, equilibrium and nonequilibrium sorption, porosity-dependent effective diffusion coefficient, and first-order decay reactions. Simulation results indicate that layered soil heterogeneity can have significant effects on both consolidation behavior and contaminant transport behavior. Characterization of a multi-layer soil stratum as a homogeneous single layer with average properties may result in significant errors in the analysis of consolidation-induced contaminant transport in multi-layer soils.

Original languageEnglish (US)
Pages (from-to)1-8
Number of pages8
JournalGeotechnical Special Publication
Volume2016-January
Issue number261 GSP
DOIs
StatePublished - Jan 1 2016
Event4th Geo-China International Conference: Geosynthetic Civil Infrastructure, Disaster Monitoring, and Environmental Geotechnics, Geo-China 2016 - Shandong, China
Duration: Jul 25 2016Jul 27 2016

Fingerprint

pollutant transport
Consolidation
consolidation
Impurities
Soils
Sorption
sorption
Hydraulic conductivity
Advection
compressibility
Compressibility
simulation
Porous materials
porous medium
soil layer
hydraulic conductivity
Materials properties
advection
boundary condition
soil

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

Cite this

@article{66232ea4d6024a5792bdba75741cfdc5,
title = "Consolidation-Induced Contaminant Transport in Multi-Layer Soils",
abstract = "This paper presents a numerical investigation of the effects of large strain consolidation on contaminant transport in multi-layer soils. Numerical simulations were conducted using the CST3 model, which accounts for one-dimensional coupled large strain consolidation and contaminant transport in saturated multi-layer porous media. The consolidation algorithm accounts for vertical strain, soil self-weight, general constitutive relationships, relative velocity of fluid and solid phases, changing compressibility and hydraulic conductivity during consolidation, unload/reload, time-dependent loading, time-dependent boundary conditions, external hydraulic gradient, variable preconsolidation stress profiles, and multiple soil layers with different material properties. The contaminant transport algorithm accounts for advection, diffusion, mechanical dispersion, linear and nonlinear sorption, equilibrium and nonequilibrium sorption, porosity-dependent effective diffusion coefficient, and first-order decay reactions. Simulation results indicate that layered soil heterogeneity can have significant effects on both consolidation behavior and contaminant transport behavior. Characterization of a multi-layer soil stratum as a homogeneous single layer with average properties may result in significant errors in the analysis of consolidation-induced contaminant transport in multi-layer soils.",
author = "Hefu Pu and Fox, {Patrick J.}",
year = "2016",
month = "1",
day = "1",
doi = "10.1061/9780784480045.001",
language = "English (US)",
volume = "2016-January",
pages = "1--8",
journal = "Geotechnical Special Publication",
issn = "0895-0563",
publisher = "American Society of Civil Engineers (ASCE)",
number = "261 GSP",

}

Consolidation-Induced Contaminant Transport in Multi-Layer Soils. / Pu, Hefu; Fox, Patrick J.

In: Geotechnical Special Publication, Vol. 2016-January, No. 261 GSP, 01.01.2016, p. 1-8.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Consolidation-Induced Contaminant Transport in Multi-Layer Soils

AU - Pu, Hefu

AU - Fox, Patrick J.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - This paper presents a numerical investigation of the effects of large strain consolidation on contaminant transport in multi-layer soils. Numerical simulations were conducted using the CST3 model, which accounts for one-dimensional coupled large strain consolidation and contaminant transport in saturated multi-layer porous media. The consolidation algorithm accounts for vertical strain, soil self-weight, general constitutive relationships, relative velocity of fluid and solid phases, changing compressibility and hydraulic conductivity during consolidation, unload/reload, time-dependent loading, time-dependent boundary conditions, external hydraulic gradient, variable preconsolidation stress profiles, and multiple soil layers with different material properties. The contaminant transport algorithm accounts for advection, diffusion, mechanical dispersion, linear and nonlinear sorption, equilibrium and nonequilibrium sorption, porosity-dependent effective diffusion coefficient, and first-order decay reactions. Simulation results indicate that layered soil heterogeneity can have significant effects on both consolidation behavior and contaminant transport behavior. Characterization of a multi-layer soil stratum as a homogeneous single layer with average properties may result in significant errors in the analysis of consolidation-induced contaminant transport in multi-layer soils.

AB - This paper presents a numerical investigation of the effects of large strain consolidation on contaminant transport in multi-layer soils. Numerical simulations were conducted using the CST3 model, which accounts for one-dimensional coupled large strain consolidation and contaminant transport in saturated multi-layer porous media. The consolidation algorithm accounts for vertical strain, soil self-weight, general constitutive relationships, relative velocity of fluid and solid phases, changing compressibility and hydraulic conductivity during consolidation, unload/reload, time-dependent loading, time-dependent boundary conditions, external hydraulic gradient, variable preconsolidation stress profiles, and multiple soil layers with different material properties. The contaminant transport algorithm accounts for advection, diffusion, mechanical dispersion, linear and nonlinear sorption, equilibrium and nonequilibrium sorption, porosity-dependent effective diffusion coefficient, and first-order decay reactions. Simulation results indicate that layered soil heterogeneity can have significant effects on both consolidation behavior and contaminant transport behavior. Characterization of a multi-layer soil stratum as a homogeneous single layer with average properties may result in significant errors in the analysis of consolidation-induced contaminant transport in multi-layer soils.

UR - http://www.scopus.com/inward/record.url?scp=84983479205&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84983479205&partnerID=8YFLogxK

U2 - 10.1061/9780784480045.001

DO - 10.1061/9780784480045.001

M3 - Conference article

AN - SCOPUS:84983479205

VL - 2016-January

SP - 1

EP - 8

JO - Geotechnical Special Publication

JF - Geotechnical Special Publication

SN - 0895-0563

IS - 261 GSP

ER -