Evaluating the Constrained Modulus and Collapsibility of Loess from Standard Penetration Test
Publication: International Journal of Geomechanics
Volume 7, Issue 4
Abstract
Argentinean loess has mechanical properties highly dependent on moisture content. Sand and silt particles jointed by clay bridges and precipitated salts form macropores which undergo high volume decrease when loaded or wetted. The constrained deformation modulus is an important parameter for the assessment of settlement and to characterize loessical formations. This work analyzes experimental results obtained in double-oedometer test and standard penetration tests (SPT) performed in silty loess. Typical behaviors observed in double-oedometer test are related to the decrease of soil modulus, collapsibility, cementation, and presence of disseminated cementing nodules. Correlations between the constrained modulus, collapsibility, and the blow count from SPT are presented. The influence of disseminated nodules, moisture content, and collapsed soil structure on the constrained modulus and collapsibility of loess is highlighted.
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Acknowledgment
The writer thanks to the Argentinean National Research Council (CONICET) for partial support this research.
References
Aitchinson, G. D. (1973). “Structurally unstable soils. State of the arts.” Proc. 8th Int. Conf. on Soils Mechanics and Foundation Engineering, Vol. 3, ISSMFE Moscú, URSS, 161–190.
Bowles, J. E. (1988). Foundation analysis and design, McGraw–Hill, New York.
Feda, J. (2000). “Specific soil behavior—collapse.” GeoEng 2000 International Conf. on Geotechnical and Geological Engineering, Melbourne, Australia, 19–24.
Feda, J. (2004). “Physical models of soil behavior.” Eng. Geol. (Amsterdam) 72(1–2), 121–129.
Francisca, F. M., and Redolfi, E. R. (2003). “Parametric analysis of the deflections of flexible pipes in collapsible soils.” 12th Panamerican Conf. on Soil Mechanics and Geotechnical Engineering, Vol. 2, ISSMGE, 2073–2079.
Heusser, J. C., and Claraz, G. (1866). “Essai pour servir a une description physique et geognostique de la province Argentine de Buenos Ayres (in French).” Memorie Societé Helvetique Science Naturelles, 21, 139.
Iriondo, M. (1997). “Models of aeolian silt deposition in the upper quaternary of South America.” Journal of South American Earth Science 10(1), 71–79.
Kröhling, D. M. (1999). “Sedimentological maps of the typical loessic units in North Pampa Argentina.” Quaternary International 62(1), 49–55.
Mitchell, J. K., and Gardner, W. S. (1975). “In situ measurements of volume change characteristics.” Special Conf. on the In Situ Measurement of Soil Properties, Vol. 2, ASCE, Raleigh, N.C., 279–345.
Reginatto, A. R., and Ferrero, J. C. (1973). “Collapse potential of soils and soil water chemistry.” 8th Int. Conf. on Soil Mechanics and Foundation Engineering, Vol. 2, ISSMFE, 177–183.
Rinaldi, V. A., Clariá, J. J., and Santamarina, J. C. (2001). “The small-strain shear modulus of Argentinean loess.” Proc., 15th Int. Conf. of Soil Mechanics and Geotechnical Engineering, Vol. 1, ISSMGE, 495–499.
Rocca, R. J. (1985). “Review of engineering properties of loess.” Rep. No. CE 299, Univ. of California, Berkeley, Calif.
Schultze, E., and Horn, A. (1967). “Base friction for horizontally loaded footings in sand and gravel.” Geotechnique 17(4), 329–347.
Teruggi, M. E. (1957). “The nature and origin of Argentinean loess.” J. Sediment. Petrol.27(3), 323–332.
Zarate, M. A. (2003). “Loess of southern South America.” Quaternary Science Reviews 22(18–19), 1987–2006.
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© 2007 ASCE.
History
Received: Dec 19, 2005
Accepted: Apr 7, 2006
Published online: Jul 1, 2007
Published in print: Jul 2007
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