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  4. Anisotropic behaviour of shallow opalinus clay
 
conference paper

Anisotropic behaviour of shallow opalinus clay

Crisci, Eleonora  
•
Ferrari, Alessio  
•
Giger, Silvio
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2019
Energy Geotechnics. SEG 2018
International Symposium on Energy Geotechnics, SEG 2018

Opalinus Clay shale, the selected host geomaterial of a high-level radioactive waste repository in Switzerland, was sourced at shallow depth in a borehole in the northern part of the country. Pairs of specimens, retrieved from the same depth were prepared to be tested in oedometric conditions, with loading in the direction either parallel or perpendicular to the bedding planes. The results showed a marked anisotropy of the material response in the low effective stress ranges (<10 MPa), with stiffer response in the direction of the bedding planes. The anisotropy reduced markedly at higher effective stress levels (≥10 MPa), resulting in similar compressibility in the two loading directions at the highest investigated effective stress level. Similarly, the computed hydraulic conductivity (via the consolidation theory) revealed larger differences in the low stress range, where the hydraulic conductivity is greater in the direction of the bedding planes. © Springer Nature Switzerland AG 2019.

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Type
conference paper
DOI
10.1007/978-3-319-99670-7_55
Author(s)
Crisci, Eleonora  
Ferrari, Alessio  
Giger, Silvio
Laloui, Lyesse  
Date Issued

2019

Publisher

Springer Verlag

Published in
Energy Geotechnics. SEG 2018
Series title/Series vol.

Springer Series in Geomechanics and Geoengineering

Start page

442

End page

448

Subjects

Anisotropy

•

Hydraulic conductivity

•

Soil mechanics

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMS  
Event nameEvent placeEvent date
International Symposium on Energy Geotechnics, SEG 2018

Lausanne, Switzerland

25-28 September, 2018

Available on Infoscience
October 4, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/148657
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