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 language | English |
|---|---|
| Pages (from-to) | 938-954 |
| Number of pages | 17 |
| Journal | Soils and Foundations |
| Volume | 54 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Oct 1 2014 |
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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 journal › Article
}
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 -