Deformation Patterns of Reinforced Foundation Sand at Failure
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 129, Issue 5
Abstract
While the stability of foundation soils has been written about extensively, the ultimate loads on reinforced soils is a subject studied to a much lesser degree. There is convincing experimental evidence in the literature that metal strips or layers of geosynthetic reinforcement can significantly increase the failure loads on foundation soils. Laboratory tests were performed to investigate the kinematics of the collapse of sand reinforced with a layer of flexible reinforcement. Sequential images of the deformation field under a model footing were digitally recorded. A correlation-based motion detection technique was used to arrive at an incremental displacement field under a strip footing model. Color-coded displacements are presented graphically. The mechanism retains some of the characteristic features of a classical bearing capacity pattern of failure, but the reinforcement modifies that mechanism to some extent. The strips of geotextile used as model reinforcement give rise to the formation of shear bands in a narrow layer adjacent to the geosynthetic. Reinforcement restrains the horizontal displacement of the soil and alters the collapse pattern. The mechanism of deformation identified in the tests will constitute a basis for limit analysis of reinforced foundation soils.
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References
Adams, M. T., and Collin, J. G.(1997). “Large model spread footing load tests on geosynthetics reinforced soil foundations.” J. Geotech. Geoenviron. Eng., 123(1), 66–72.
Anandan, P. (1987). “A unified perspective on computational techniques for the measurement of visual motion.” Proc., 1st Int. Conf. on Computer Vision, London, 219–230.
Barron, J. L., Fleet, D. J., Beauchemin, S., and Burkitt, T. A. (1993). “Performance of optical flow techniques.” Computer Science Dept., Univ. of Western Ontario, Ont., Canada.
Beauchemin, S., and Barron, J. L. (1995). Computer program made available at the web site of the Computer Science Dept., Univ. of Western Ontario, Ont., Canada.
Binquet, J., and Lee, K. L.(1975). “Bearing capacity tests on reinforced earth slabs.” J. Geotech. Eng., 101(12), 1241–1255.
Huang, C. C., and Tatsuoka, F.(1990). “Bearing capacity of reinforced horizontal sandy ground.” Geotext. Geomembr., 9(1), 51–82.
Humphrey, D. N., and Holtz, R. D.(1986). “Reinforced embankments—A review of case histories.” Geotext. Geomembr., 4, 129–144.
Michalowski, R. L.(1987). “Flow of granular media through a plane parallel/converging bunker.” Chem. Eng. Sci., 42(11), 2587–2596.
Michalowski, R. L.(1990). “Strain localization and periodic fluctuations in granular flow processes from hoppers.” Geotechnique, 40(3), 389–403.
Michalowski, R. L.(1998). “Limit analysis in stability calculations of reinforced soil structures.” Geotext. Geomembr., 16, 311–331.
Miyazaki, K., and Hirokawa, F. (1992). “Fundamental study of reinforcement of sand layer in model test.” Proc., Earth Reinforcement Practice, H. Ochiai, S. Hayashi, and J. Otani, eds., Balkema, Rotterdam, The Netherlands.
Pearson, D. (1991). Image processing, McGraw-Hill, London.
Porbaha, A., and Goodings, D. J.(1996). “Centrifuge modeling of geotextile-reinforced cohesive soil retaining walls.” J. Geotech. Eng., 122(10), 840–848.
Prandtl, L.(1920). “Über die Härte plastischer Körper.” Nachr. Königl. Ges. Wissensch., Göttingen; Mathematisch-physikalische Klasse, 74–85.
Reissner, H. (1924). “Zum Erddruckproblem.” Proc., 1st Int. Congress for Applied Mechanics, C. B. Biezeno and J. M. Burgers, eds., Delft, The Netherlands, 295–311.
Sakti, J. P., and Das, B. M. (1987). “Model tests for strip foundation on clay reinforced with geotextile layers.” Transportation Research Board, 1153, Transportation Research Board, Washington, D.C., 40–45.
Shield, R. D.(1953). “Mixed boundary value problems in soil mechanics.” Q. Appl. Math., 11, 71–75.
Sokolovskii, V. V. (1965). Statics of granular media, Pergamon, Oxford.
Tatsuoka, F., Goto, S., Tanaka, T., Tani, K., and Kimura, Y. (1997). “Particle size effects on bearing capacity of footing on granular material.” Proc., Deformation and Progressive Failure in Geomechanics, IS-Nagoya ’97;
A. Asaoka, T. Adachi, and F. Oka, eds., Pergamon, 133–138.
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Copyright © 2003 American Society of Civil Engineers.
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Received: Jul 10, 2001
Accepted: May 24, 2002
Published online: Apr 15, 2003
Published in print: May 2003
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