Comptes Rendus
Influence of inter-granular void ratio on monotonic and cyclic undrained shear response of sandy soils
Comptes Rendus. Mécanique, Volume 338 (2010) no. 5, pp. 290-303.

Liquefaction of sandy soil deposits during earthquakes has been one of the most important problems in the field of geotechnical earthquake engineering. A major challenge is the assessment of the appropriate undrained shear strength of liquefied soils to be used in the study of liquefaction stability of different types of earth structures (embankments, earthdams, etc.). The objective of this laboratory investigation is to study the effect of the inter-granular void ratio on the phase transition state undrained shear strength of loose, medium dense and dense (Dr=12, 50, and 90%) sand–silt soil mixtures under monotonic loading and liquefaction potential under cyclic loading. For this purpose, we considered the matrix of sand with fines as a combination of two sub-matrices: a coarser grain matrix and a finer grain matrix. Moreover, series of undrained triaxial compression tests were carried out on reconstituted saturated silty sand samples with fines contents ranging from 0 to 50%. The results show that the global void ratio does not reflect the real behaviour of the soil and the undrained shear strength at the phase transition state can be correlated to the inter-granular void ratio of the sand–silt mixtures up to 50% fines content. Indeed, it decreases linearly with further increase in the inter-granular void ratio. The results of the undrained cyclic tests confirm this tendency.

La liquéfaction des dépôts de sols sableux pendant les séismes a toujours été l'un des problèmes les plus importants dans le domaine de la géotechnique. Un défi important est l'évaluation de la resistance au cisaillement non drainée appropriée des sols liquéfiables à utiliser dans l'étude de la stabilité de liquéfaction de différents types d'ouvrages en terre (remblais, barrages en terre, etc.). L'objectif de ce travail expérimental est d'étudier l'effet de l'indice des vides intergranulaire sur la résistance au cisaillement non drainée mesurée en changement de phase des mélanges de sable–limon lâche, moyennement dense et dense (Dr=12, 50, et 90%) sous chargement monotone et le potentiel de liquéfaction sous chargement cyclique. Pour cela, nous considérons que la matrice de sable contenant les fines est la combinaison de deux matrices : une matrice de sol grenu et une matrice de sol fin. A cet effet, une série d'essais de compression triaxiale non drainés a été effectuée sur des échantillons de sable limoneux saturés à des teneurs en fines variant de 0 à 50%. Les résultats montrent que l'indice des vides global ne reflète pas le comportement réel du sol et que la résistance au cisaillement non drainée mesurée en changement de phase peut être corrélée avec l'indice des vides intergranulaire des mélanges de sable–limon jusqu'à une teneur en fines de 50%. En effet, elle diminue linéairement avec l'augmentation de l'indice des vides inter-granulaire. Les résultats des essais cycliques non drainés confirment cette tendance.

Received:
Accepted:
Published online:
DOI: 10.1016/j.crme.2010.04.002
Keywords: Soils, Silty sand, Residual shear strength, Inter-granular void ratio, Fines, Liquefaction
Mot clés : Sols, Sable limoneux, Résistance au cisaillement résiduelle, Indice des vides inter-granulaire, Fines, Liquéfaction

M. Belkhatir 1; A. Arab 1; N. Della 1; H. Missoum 2; T. Schanz 3

1 Civil Engineering Department, University of Chlef, BP 151, Route de Sendjes, 02000 Chlef, Algeria
2 Civil Engineering Department, University of Mostaganem, Algeria
3 Laboratory of Foundation Engineering, Soil and Rock Mechanics, Ruhr University of Bochum, Germany
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M. Belkhatir; A. Arab; N. Della; H. Missoum; T. Schanz. Influence of inter-granular void ratio on monotonic and cyclic undrained shear response of sandy soils. Comptes Rendus. Mécanique, Volume 338 (2010) no. 5, pp. 290-303. doi : 10.1016/j.crme.2010.04.002. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2010.04.002/

[1] S. Thevanayagam Dielectric dispersion of porous media as a fractal phenomenon, J. Appl. Phys., Volume 82 (1997) no. 5, pp. 2538-2547

[2] S. Thevanayagam; S. Nesarajah Fractal model for flow through saturated soil, J. Geotech. Geoenviron. Eng., ASCE, Volume 124 (1998) no. 1, pp. 53-66

[3] S. Zlatovic, K. Ishihara, On the influence of non-plastic fines on residual strength, in: Proc. of the First Int. Conf. on Earthquake Geotech. Eng., Tokyo, 1995, pp. 14–16

[4] P.V. Lade; J.A. Yamamuro Effects of non-plastic fines on static liquefaction of sands, Canadian Geotech. J., Volume 34 (1997), pp. 918-928

[5] S. Thevanayagam; K. Ravishankar; S. Mohan Effects of fines on monotonic undrained shear strength of sandy soils, ASTM Geotech Testing J., Volume 20 (1997) no. 1, pp. 394-406

[6] S. Thevanayagam Effect of fines and confining stress on undrained shear strength of silty sands, J. Geotech. Geoenviron. Eng., ASCE, Volume 124 (1998) no. 6, pp. 479-491

[7] J.A. Yamamuro; P.V. Lade Steady-state concepts and static liquefaction of silty sands, J. Geotech. Geoenviron. Eng., ASCE, Volume 124 (1998) no. 9, pp. 868-877

[8] F. Amini; G.Z. Qi Liquefaction testing of stratified silty sands, J. Geotech. Geoenviron. Eng., ASCE, Volume 126 (2000) no. 3, pp. 208-217

[9] S.A. Naeini, The influence of silt presence and sample preparation on liquefaction potential of silty sands, PhD dissertation, Iran University of Science and Technology, Tehran, 2001

[10] S.A. Naeini; M.H. Baziar Effect of fines content on steady-state strength of mixed and layered samples of a sand, Soil Dynam. Earth. Eng., Volume 24 (2004), pp. 181-187

[11] J. Chu; W.K. Leong Effect of fines on instability behaviour of loose sand, Geotechnique, Volume 52 (2002) no. 10, pp. 751-755

[12] M.M. Monkul, Influence of inter-granular void ratio on one dimensional compression, M.Sc. thesis, Dokuz Eylul University, Izmir, Turkey, 2005

[13] R.S. Ladd Preparing test specimen using under compaction, Geotech. Testing J., GTJODJ, Volume 1 (1978), pp. 16-23

[14] T.C. Kenny, Residual strengths of mineral mixtures, in: Proc. 9th Int. Conf. Soil Mech. and Found. Eng., Tokyo, vol. 1, 1977, pp. 155–160

[15] R. Kuerbis; D. Nagussey; Y.P. Vaid Effect of gradation and fines content on the undrained response of sand, Proc. Hyd. Fill. Struc. Geotech. Spec. Publ., vol. 21, ASCE, New York, 1988, pp. 330-345

[16] J.K. Mitchell Fundamental of Soil Behaviour, John Wiley–Interscience, New York, 1993

[17] S. Thevanayagam; S. Mohan Inter-granular state variables and stress-strain behaviour of silty sands, Geotechnique, Volume 50 (2000) no. 1, pp. 1-23

[18] C.K. Shen, J.L. Vrymoed, C.K. Uyeno, The effects of fines on liquefaction of sands, in: Proc. 9th Int. Conf. Soil Mech. and Found. Eng., Tokyo, vol. 2, 1977, pp. 381–385

[19] J.H. Troncosco, R. Verdugo, Silt content and dynamic behaviour of tailing sands, in: Proc. 12th Int. Conf. on Soil Mech. and Found. Eng., San Francisco, 1985, pp. 1311–1314

[20] K. Ishihara Liquefaction and flow failure during earthquakes, Geotechnique, Volume 43 (1993) no. 3, pp. 351-415

[21] M.P. Luong Etat caractéristique du sol, C. R. Acad. Sci. Paris Ser. B, Volume 287 (1978), pp. 305-307

[22] T.G. Sitharam; L. Govinda Raju; B.R. Srinivasa Murthy Cyclic and monotonic undrained shear response of silty sand from Bhuj region in India, ISET J. Earthquake Technol., Volume 41 ( June–December 2004 ) no. 2–4, pp. 249-260

[23] M.H. Baziar; R. Dobry Residual strength and large-deformation potential of loose silty sands, J. Geotech. Eng., ASCE, Volume 121 (1995), pp. 896-906

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