Prediction of embankment behavior of regulating reservoir with foundation improved by vacuum consolidation method

Toshifumi Shibata, Akira Murakami, Makoto Fujii

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The present paper addresses the numerical prediction of the behavior of a ground and a reservoir dyke with a retaining wall at the site of a regulating reservoir whose soft soil foundation is improved by using both the usual embankment preloading and vacuum consolidation. To evaluate the settlement, the lateral deformation, and the dissipation of pore pressure during vacuum preloading, a numerical analysis using an elasto-plastic FEM for soil-water coupled problems, incorporating the SYS Cam-clay model, is carried out in two dimensions. However, a change in the soil parameters during the vacuum preloading leads to a less accurate computation. To account for the uncertainties in the input parameters of the constitutive model for the improved ground, an inverse analysis approach is adopted. The particle filter is used to identify the compression index of the clay layers and the coefficient of permeability of the organic soil layer based on the measured settlement at the bottom of the preloading embankment during the vacuum consolidation. The reservoir dyke with a retaining wall is constructed on an improved foundation after removing the preloading embankment, and an attempt is made to predict its performance after construction by an elasto-plastic FEM for soil-water coupled problems using the identified parameters.

Original languageEnglish
Pages (from-to)938-954
Number of pages17
JournalSoils and Foundations
Volume54
Issue number5
DOIs
Publication statusPublished - Oct 1 2014

Fingerprint

preloading
Embankments
embankment
Consolidation
consolidation
Vacuum
Soils
prediction
Retaining walls
retaining wall
dike
Clay
plastic
soil water
Plastics
Cam-clay model
inverse analysis
Finite element method
Cams
Pore pressure

Keywords

  • Inverse analysis
  • Particle filter
  • Vacuum consolidation method

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering

Cite this

Prediction of embankment behavior of regulating reservoir with foundation improved by vacuum consolidation method. / Shibata, Toshifumi; Murakami, Akira; Fujii, Makoto.

In: Soils and Foundations, Vol. 54, No. 5, 01.10.2014, p. 938-954.

Research output: Contribution to journalArticle

@article{1b2d148ff6654084b243f1a3239fded2,
title = "Prediction of embankment behavior of regulating reservoir with foundation improved by vacuum consolidation method",
abstract = "The present paper addresses the numerical prediction of the behavior of a ground and a reservoir dyke with a retaining wall at the site of a regulating reservoir whose soft soil foundation is improved by using both the usual embankment preloading and vacuum consolidation. To evaluate the settlement, the lateral deformation, and the dissipation of pore pressure during vacuum preloading, a numerical analysis using an elasto-plastic FEM for soil-water coupled problems, incorporating the SYS Cam-clay model, is carried out in two dimensions. However, a change in the soil parameters during the vacuum preloading leads to a less accurate computation. To account for the uncertainties in the input parameters of the constitutive model for the improved ground, an inverse analysis approach is adopted. The particle filter is used to identify the compression index of the clay layers and the coefficient of permeability of the organic soil layer based on the measured settlement at the bottom of the preloading embankment during the vacuum consolidation. The reservoir dyke with a retaining wall is constructed on an improved foundation after removing the preloading embankment, and an attempt is made to predict its performance after construction by an elasto-plastic FEM for soil-water coupled problems using the identified parameters.",
keywords = "Inverse analysis, Particle filter, Vacuum consolidation method",
author = "Toshifumi Shibata and Akira Murakami and Makoto Fujii",
year = "2014",
month = "10",
day = "1",
doi = "10.1016/j.sandf.2014.09.008",
language = "English",
volume = "54",
pages = "938--954",
journal = "Soils and Foundations",
issn = "0038-0806",
publisher = "Japanese Geotechnical Society",
number = "5",

}

TY - JOUR

T1 - Prediction of embankment behavior of regulating reservoir with foundation improved by vacuum consolidation method

AU - Shibata, Toshifumi

AU - Murakami, Akira

AU - Fujii, Makoto

PY - 2014/10/1

Y1 - 2014/10/1

N2 - The present paper addresses the numerical prediction of the behavior of a ground and a reservoir dyke with a retaining wall at the site of a regulating reservoir whose soft soil foundation is improved by using both the usual embankment preloading and vacuum consolidation. To evaluate the settlement, the lateral deformation, and the dissipation of pore pressure during vacuum preloading, a numerical analysis using an elasto-plastic FEM for soil-water coupled problems, incorporating the SYS Cam-clay model, is carried out in two dimensions. However, a change in the soil parameters during the vacuum preloading leads to a less accurate computation. To account for the uncertainties in the input parameters of the constitutive model for the improved ground, an inverse analysis approach is adopted. The particle filter is used to identify the compression index of the clay layers and the coefficient of permeability of the organic soil layer based on the measured settlement at the bottom of the preloading embankment during the vacuum consolidation. The reservoir dyke with a retaining wall is constructed on an improved foundation after removing the preloading embankment, and an attempt is made to predict its performance after construction by an elasto-plastic FEM for soil-water coupled problems using the identified parameters.

AB - The present paper addresses the numerical prediction of the behavior of a ground and a reservoir dyke with a retaining wall at the site of a regulating reservoir whose soft soil foundation is improved by using both the usual embankment preloading and vacuum consolidation. To evaluate the settlement, the lateral deformation, and the dissipation of pore pressure during vacuum preloading, a numerical analysis using an elasto-plastic FEM for soil-water coupled problems, incorporating the SYS Cam-clay model, is carried out in two dimensions. However, a change in the soil parameters during the vacuum preloading leads to a less accurate computation. To account for the uncertainties in the input parameters of the constitutive model for the improved ground, an inverse analysis approach is adopted. The particle filter is used to identify the compression index of the clay layers and the coefficient of permeability of the organic soil layer based on the measured settlement at the bottom of the preloading embankment during the vacuum consolidation. The reservoir dyke with a retaining wall is constructed on an improved foundation after removing the preloading embankment, and an attempt is made to predict its performance after construction by an elasto-plastic FEM for soil-water coupled problems using the identified parameters.

KW - Inverse analysis

KW - Particle filter

KW - Vacuum consolidation method

UR - http://www.scopus.com/inward/record.url?scp=84907341763&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84907341763&partnerID=8YFLogxK

U2 - 10.1016/j.sandf.2014.09.008

DO - 10.1016/j.sandf.2014.09.008

M3 - Article

AN - SCOPUS:84907341763

VL - 54

SP - 938

EP - 954

JO - Soils and Foundations

JF - Soils and Foundations

SN - 0038-0806

IS - 5

ER -