FN Archimer Export Format
PT J
TI Yielding and plastic behaviour of Boom clay
BT 
AF SULTAN, Nabil
   CUI, Y. -J.
   DELAGE, P.
AS 1:1;2:2;3:2;
FF 1:PDG-DOP-DCB-GM-LES;2:;3:;
C1 IFREMER, Dept Geosci, Marines, France.
   Univ Paris Est, Ecole Ponts ParisTech UR Navier CERMES, Paris, France.
C2 IFREMER, FRANCE
   UNIV PARIS EST, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 0.92
TC 35
UR https://archimer.ifremer.fr/doc/00013/12414/9530.pdf
LA English
DT Article
DE ;anisotropy;clays;constitutive relations;elasticity;laboratory tests;plasticity;shear strength
AB An underground research laboratory (URL) has been excavated in a deposit of Boom clay at a depth of 223 m by the SCK-CEN Belgian organisation near the city of Mol. This URL is devoted to research into nuclear waste disposal. This paper presents the results of an investigation carried out in the triaxial apparatus on specimens that were trimmed from blocks extracted during excavation sequences in the URL. In order to characterise the mechanical behaviour of the natural Boom clay and to examine the effect of initial and induced anisotropy on its constitutive behaviour, two series of triaxial tests were carried out. Special attention was devoted to the yield behaviour and the effects of stress history. Experimental results showed a clear relation between the shape of yield curves and stress history. The yield curve of the clay in its initial state was oriented along the K-0 line, illustrating the anisotropy of fabric that was generated during the soil deposition. Subsequent isotropic compression (up to 9 MPa) made the yield curve more and more oriented along the p' axis. Based on these experimental results, an elasto-plastic model accounting for isotropic and anisotropic hardening in (p':q) space was developed. The initial yield curve of the soil was taken inclined with respect to the p' axis. The formulation proposed describes the change in shape, size and orientation of the yield curve, according to the stress history. Eight constitutive parameters were used to describe the anisotropic behaviour of the soil.
PY 2010
PD SEP
SO Geotechnique
SN 0016-8505
PU Thomas Telford Publishing
VL 60
IS 9
UT 000281363100001
BP 657
EP 666
DI 10.1680/geot.7.00142
ID 12414
ER

EF