Observed behavior of reconstituted clay along stress paths typical of excavations
Identifieur interne : 000717 ( PascalFrancis/Corpus ); précédent : 000716; suivant : 000718Observed behavior of reconstituted clay along stress paths typical of excavations
Auteurs : A. Amorosi ; L. Callisto ; S. RampelloSource :
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
The paper presents experimental results from a laboratory investigation on reconstituted samples of a stiff and overconsolidated clay. The experimental programme was carried out using stress path triaxial cells to investigate the mechanical behaviour of the soil when subjected to stress paths typical of excavations. Samples were compressed along continuous drained paths under approximately K0 conditions to different values of the maximum effective stress and overconsolidation ratio OCR. After compression to the desired values of OCR pairs of samples were sheared along two different drained stress paths: compression with decreasing horizontal effective stress under constant vertical effective stress, and extension with decreasing vertical effective stress under constant horizontal effective stress. For OCR = 3, undrained compression and extension tests were also carried out. In the interpretation of experimental results, the effect of the direction of the stress paths on the shear stiffness is evaluated and distinguished from the influence of the previous stress history. The observed stress dilatancy and mobilisation of the shear strength are also discussed
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NO : | PASCAL 01-0252326 BRGM |
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ET : | Observed behavior of reconstituted clay along stress paths typical of excavations |
AU : | AMOROSI (A.); CALLISTO (L.); RAMPELLO (S.); JAMIOLKOWSKI (Michele) |
AF : | University of Rome 'La Sapienza'/Italie (1 aut., 2 aut.); University of Messina/Italie (3 aut.); Department of Structural and geotechnical Engineering, Politecnico di Torino/Italie (1 aut.) |
DT : | Congrès; Niveau analytique |
SO : | International symposium on pre-failure deformation characteristics of geomaterials - IS Torino 99/2/1999-09-28/Torino ITA; Pays-Bas; Rotterdam: A.A. Balkema; Da. 1999; Pp. 35-42; ISBN 90-5809-076-0 |
LA : | Anglais |
EA : | The paper presents experimental results from a laboratory investigation on reconstituted samples of a stiff and overconsolidated clay. The experimental programme was carried out using stress path triaxial cells to investigate the mechanical behaviour of the soil when subjected to stress paths typical of excavations. Samples were compressed along continuous drained paths under approximately K0 conditions to different values of the maximum effective stress and overconsolidation ratio OCR. After compression to the desired values of OCR pairs of samples were sheared along two different drained stress paths: compression with decreasing horizontal effective stress under constant vertical effective stress, and extension with decreasing vertical effective stress under constant horizontal effective stress. For OCR = 3, undrained compression and extension tests were also carried out. In the interpretation of experimental results, the effect of the direction of the stress paths on the shear stiffness is evaluated and distinguished from the influence of the previous stress history. The observed stress dilatancy and mobilisation of the shear strength are also discussed |
CC : | 226B01; 001E01O01 |
FD : | Argile raide; Matériau surconsolidé; Excavation; Contrainte; Déformation sous contrainte; Module cisaillement; Latium; Argile Vallerica |
FG : | Italie; Europe Sud; Europe |
ED : | stiff clays; overconsolidated materials; excavations; stress; strain; shear modulus; Latium Italy |
EG : | Italy; Southern Europe; Europe |
SD : | Arcilla tenaz; Material sobreconsolidado; Excavación; Coacción; Deformación bajo tensión; Módulo cizalladura Coulomb; Lacio |
LO : | BRGM-L/14889 |
ID : | 01-0252326 |
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Pascal:01-0252326Le document en format XML
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<author><name sortKey="Amorosi, A" sort="Amorosi, A" uniqKey="Amorosi A" first="A." last="Amorosi">A. Amorosi</name>
<affiliation><inist:fA14 i1="01"><s1>University of Rome 'La Sapienza'</s1>
<s3>ITA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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<author><name sortKey="Callisto, L" sort="Callisto, L" uniqKey="Callisto L" first="L." last="Callisto">L. Callisto</name>
<affiliation><inist:fA14 i1="01"><s1>University of Rome 'La Sapienza'</s1>
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<author><name sortKey="Rampello, S" sort="Rampello, S" uniqKey="Rampello S" first="S." last="Rampello">S. Rampello</name>
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<author><name sortKey="Callisto, L" sort="Callisto, L" uniqKey="Callisto L" first="L." last="Callisto">L. Callisto</name>
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<author><name sortKey="Rampello, S" sort="Rampello, S" uniqKey="Rampello S" first="S." last="Rampello">S. Rampello</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Latium Italy</term>
<term>excavations</term>
<term>overconsolidated materials</term>
<term>shear modulus</term>
<term>stiff clays</term>
<term>strain</term>
<term>stress</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Argile raide</term>
<term>Matériau surconsolidé</term>
<term>Excavation</term>
<term>Contrainte</term>
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<front><div type="abstract" xml:lang="en">The paper presents experimental results from a laboratory investigation on reconstituted samples of a stiff and overconsolidated clay. The experimental programme was carried out using stress path triaxial cells to investigate the mechanical behaviour of the soil when subjected to stress paths typical of excavations. Samples were compressed along continuous drained paths under approximately K<sub>0</sub>
conditions to different values of the maximum effective stress and overconsolidation ratio OCR. After compression to the desired values of OCR pairs of samples were sheared along two different drained stress paths: compression with decreasing horizontal effective stress under constant vertical effective stress, and extension with decreasing vertical effective stress under constant horizontal effective stress. For OCR = 3, undrained compression and extension tests were also carried out. In the interpretation of experimental results, the effect of the direction of the stress paths on the shear stiffness is evaluated and distinguished from the influence of the previous stress history. The observed stress dilatancy and mobilisation of the shear strength are also discussed</div>
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<fA14 i1="01"><s1>University of Rome 'La Sapienza'</s1>
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<fA14 i1="02"><s1>University of Messina</s1>
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<fA15 i1="01"><s1>Department of Structural and geotechnical Engineering, Politecnico di Torino</s1>
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<fC01 i1="01" l="ENG"><s0>The paper presents experimental results from a laboratory investigation on reconstituted samples of a stiff and overconsolidated clay. The experimental programme was carried out using stress path triaxial cells to investigate the mechanical behaviour of the soil when subjected to stress paths typical of excavations. Samples were compressed along continuous drained paths under approximately K<sub>0</sub>
conditions to different values of the maximum effective stress and overconsolidation ratio OCR. After compression to the desired values of OCR pairs of samples were sheared along two different drained stress paths: compression with decreasing horizontal effective stress under constant vertical effective stress, and extension with decreasing vertical effective stress under constant horizontal effective stress. For OCR = 3, undrained compression and extension tests were also carried out. In the interpretation of experimental results, the effect of the direction of the stress paths on the shear stiffness is evaluated and distinguished from the influence of the previous stress history. The observed stress dilatancy and mobilisation of the shear strength are also discussed</s0>
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<server><NO>PASCAL 01-0252326 BRGM</NO>
<ET>Observed behavior of reconstituted clay along stress paths typical of excavations</ET>
<AU>AMOROSI (A.); CALLISTO (L.); RAMPELLO (S.); JAMIOLKOWSKI (Michele)</AU>
<AF>University of Rome 'La Sapienza'/Italie (1 aut., 2 aut.); University of Messina/Italie (3 aut.); Department of Structural and geotechnical Engineering, Politecnico di Torino/Italie (1 aut.)</AF>
<DT>Congrès; Niveau analytique</DT>
<SO>International symposium on pre-failure deformation characteristics of geomaterials - IS Torino 99/2/1999-09-28/Torino ITA; Pays-Bas; Rotterdam: A.A. Balkema; Da. 1999; Pp. 35-42; ISBN 90-5809-076-0</SO>
<LA>Anglais</LA>
<EA>The paper presents experimental results from a laboratory investigation on reconstituted samples of a stiff and overconsolidated clay. The experimental programme was carried out using stress path triaxial cells to investigate the mechanical behaviour of the soil when subjected to stress paths typical of excavations. Samples were compressed along continuous drained paths under approximately K<sub>0</sub>
conditions to different values of the maximum effective stress and overconsolidation ratio OCR. After compression to the desired values of OCR pairs of samples were sheared along two different drained stress paths: compression with decreasing horizontal effective stress under constant vertical effective stress, and extension with decreasing vertical effective stress under constant horizontal effective stress. For OCR = 3, undrained compression and extension tests were also carried out. In the interpretation of experimental results, the effect of the direction of the stress paths on the shear stiffness is evaluated and distinguished from the influence of the previous stress history. The observed stress dilatancy and mobilisation of the shear strength are also discussed</EA>
<CC>226B01; 001E01O01</CC>
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<FG>Italie; Europe Sud; Europe</FG>
<ED>stiff clays; overconsolidated materials; excavations; stress; strain; shear modulus; Latium Italy</ED>
<EG>Italy; Southern Europe; Europe</EG>
<SD>Arcilla tenaz; Material sobreconsolidado; Excavación; Coacción; Deformación bajo tensión; Módulo cizalladura Coulomb; Lacio</SD>
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