Generalized Model for Geosynthetic-Reinforced Granular Fill-Soft Soil with Stone Columns
Publication: International Journal of Geomechanics
Volume 7, Issue 4
Abstract
This paper pertains to the development of a mechanical model to predict the behavior of a geosynthetic-reinforced granular fill over soft soil improved with stone columns. The saturated soft soil has been idealized by Kelvin–Voight model to represent its consolidation behavior. The stone columns are idealized by stiffer springs. Pasternak shear layer and rough elastic membrane represent the granular fill and geosynthetic reinforcement layer, respectively. The nonlinear behavior of the granular fill and the soft soil is considered. Effect of consolidation of the soft soil due to inclusion of the stone columns has also been included in the model. Plane strain conditions are considered for the loading and reinforced foundation soil system. An iterative finite difference scheme is applied for obtaining the solution, and results are presented in nondimensional form. Comparison between the results from the present study and the analytical solution using theory of elasticity shows reasonable agreement. The advantage of using geosynthetic reinforcement is highlighted. Results indicate that inclusion of the geosynthetic layer effectively reduces the settlement. Nonlinearity in the behavior of the soft soil and the granular fill is reduced due to the use of geosynthetic reinforcement layer.
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References
Alamgir, M., Miura, N., Poorooshasb, H. B., and Madhav, M. R. (1996). “Deformation analysis of soft ground reinforced by columnar inclusions.” Comput. Geotech., 18(4), 267–290.
Alpan, I. (1967). “The empirical evaluation of the coefficient and .” Soils Found., 7(1), 31–40.
Balaam, N. P., and Booker, J. R. (1981). “Analysis of rigid raft supported by granular piles.” Int. J. Numer. Analyt. Meth. Geomech., 5(4), 379–403.
Brooker, E. W., and Ireland, H. O. (1965). “Earth pressure at rest related to stress history.” Can. Geotech. J., 2(1-2), 1–15.
Carillo, N. (1942). “Simple two and three dimensional cases in the theory of consolidation of soils.” J. Math. Phys., 21(1), 1–5.
Deb, K., Chandra, S., and Basudhar, P. K. (2005). “Settlement response of a multi layer geosynthetic-reinforced granular fill-soft soil system.” Geosynthet. Int., 12(6), 288–298.
Filz, G. M., and Smith, M. E. (2006). Design of bridging layers in geosynthetic-reinforced, column-supported embankments, Virginia Transportation Research Council, Charlottesville, Va.
Ghosh, C., and Madhav, M. R. (1994). “Settlement response of a reinforced shallow earth bed.” Geotext. Geomembr., 13(9), 643–656.
Han, J., and Gabr, M. A. (2002). “Numerical analysis of geosynthetic-reinforced and pile-supported earth platforms over soft soil.” J. Geotech. Geoenviron. Eng., 128(1), 44–53.
Han, J., and Ye, S. L. (2001). “Simplified method for consolidation rate of stone column reinforced foundations.” J. Geotech. Geoenviron. Eng., 127(7), 597–603.
Hausmann, M. R. (1990). Engineering principles of ground modification, McGraw-Hill, New York.
Hird, C. C., Pyrah, I. C., and Russell, D. (1992). “Finite element modeling of vertical drains beneath embankments on soft ground.” Geotechnique, 42(3), 499–511.
Kondner, R. L. (1963). “Hyperbolic stress-strain response: cohesive soils.” J. Soil Mech. and Found. Div., 89(1), 115–143.
Lee, J. S., and Pande, G. N. (1998). “Analysis of stone-column reinforced foundations.” Int. J. Numer. Analyt. Meth. Geomech., 12(12), 1001–1020.
Madhav, M. R., and Poorooshasb, H. B. (1988). “A new model for geosynthetic-reinforced soil.” Comput. Geotech., 6(4), 277–290.
Maheshwari, P., Basudhar, P. K., and Chandra, S. (2004). “Analysis of beams on reinforced granular beds.” Geosynthet. Int., 11(6), 470–480.
Mitchell, J. K. (1981). “Soil improvement—state of the art report.” Proc., 10th Int. Conf. on Soil Mechanics and Foundation Engineering, Vol. 4, Balkema, Rotterdam, The Netherlands, 509–565.
Nogami, T., and Yong, T. Y. (2003). “Load-settlement analysis of geosynthetic-reinforced soil with a simplified model.” Soils Found., 43(3), 33–42.
Poorooshasb, H. B. (1989). “Analysis of geosynthetic reinforced soil using a simple transform function.” Comput. Geotech., 8(4), 289–309.
Poorooshasb, H. B., and Meyerhof, G. G. (1997). “Analysis of behavior of stone columns and lime columns.” Comput. Geotech., 20(1), 47–70.
Selvadurai, A. P. S. (1979). Elastic analysis of soil-foundation interaction, Elsevier Scientific, Amsterdam, The Netherlands.
Shahu, J. T., Madhav, M. R., and Hayashi, S. (2000). “Analysis of soft ground-granular pile-granular mat system.” Comput. Geotech., 27(1), 45–62.
Shukla, S. K., and Chandra, S. (1994). “The effect of prestressing on the settlement characteristics of geosynthetic-reinforced soil.” Geotext. Geomembr., 13(8), 531–543.
Shukla, S. K., and Chandra, S. (1995). “Modeling of geosynthetic-reinforced engineered granular fill on soft soil.” Geosynthet. Int., 2(3), 603–617.
Terzaghi, K. (1943). Theoretical soil mechanics, Wiley, New York.
Yin, J. H. (1997). “Modeling geosynthetic-reinforced granular fills over soft soil.” Geosynthet. Int., 4(2), 165–185.
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© 2007 ASCE.
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Received: Jul 25, 2005
Accepted: Feb 5, 2007
Published online: Jul 1, 2007
Published in print: Jul 2007
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