Experimental and Numerical Investigation of Reinforced Sand Slope Using Geogird Encased Stone Column

Document Type : Research Papers


1 Civil Engineering-Razi University-Kermanshah-Iran

2 Civil Eng.-Razi University-Kermanshah-Iran


Among all of the slope stability methods, use of stone columns and geosynthetic elements can be a good way for stabilizing. One of the efficient ways in order to reinforce earth slopes is Geogrid Encased Stone Column (GESC). This technique can dramatically increase bearing capacity and decrease settlement rate. The aim of this paper is experimentally to investigate a comparison between the behavior of Ordinary Stone Column (OSC) and GESC for reinforcing of sand slopes. The slope was constructed using raining technique and reinforced using GESC. The slope saturated through precipitation and loading procedure applied. The obtained results compared and verified with 3D Finite Difference Method (3DFDM). Both experimental and numerical analyses indicated that location of GESC in middle of the slope increases the bearing capacity of slope crown 2.17 times than OSC.


Main Subjects

Aboshi, H., Ichimoto, E., Harada, K. and Emoki, M. (1979). “The composer: A method to improve the characteristics of soft clays by inclusion of large diameter sand columns”, Proceedings of International Conference on Soil Reinforcement, E.N.P.C., 1, Paris, 211-216.
Beneito, C. and Gotteland, Ph. (2001). “Three-dimensional numerical modeling of geosynthetics mechanical behavior”, Proceedings of the Second International FLAC Symposium on Numerical Modeling in Geomechanics, Lyon, France, 29-31.
Castro, J., Cimentada, A., Costa, A., Ganizal, J. and Sagaseta, C. (2013). “Consolidation and deformation around stone columns: Comparison of theoretical and laboratory results”, Computers and Geotechnics, 49, 326-337.
Choobasti, A.J. and Pichka, H. (2014). “Improvement of soft clay using installation of geosynthetic-encased stone column: Numerical study”, Arabian Journal of Geoscience, 7(2), 597-607.
Connor, S.S. and Gorski, A.G. (2000). “A timely solution for the Nojoqi Grade landslide, Repair US 101 South of Buellton”, In 51st Annual Highway Geology Symposium, Seattle, 1-11.
Debnath, P. and Dey, K. (2018). “Prediction of bearing capacity of geogrid-reinforced stone columns using support vector regression”, International Journal of Geomechanics, 18(2), 1-15.
Dheerendra, B.M.R., Sitaram, N. and Shivashankar, R. (2013). “A critical review of construction, analysis and behavior of stone column”, Geotechnical and Geological Engineering, 31(1), 1-22.
Fakher, A. and Jones, C.J.F.P. (1996). “Discussion on bearing capacity of rectangular footings on geogrid reinforced sand by Yetimoglu, T., Wu, J.T.H., Saglamer,A.”, Journal of Geotechnical Engineering, 122, 326-327.
Fattah, M.Y., Zabar, B. and Hassan, H.A. (2016). “Experimental analysis of embankment on ordinary and encased stone columns”, International Journal of Geomechanics, 16(4), 1-13.
Fattah, M.Y. and Majeed. Q.G. (2012). “Finite Element analysis of geogrid encased stone columns”, Geotechnical and Geological Engineering, 30, 713-726.
Greenwood, D.A. (1970). “Mechanical improvement of soils below ground surface”, In Proceedings of Ground Engineering Conference. Institution of Civil Engineers, London, 11-22.
Gueguin, M., Hassen, G. and Buhan, P. (2015). “Stability analysis of homogenized stone column reinforced foundations using a numerical yield design approach”, Computers and Geotechnics, 64, 10-19.
Gu, M., Han, J. and Zhao, M. (2017). “Three-dimensional DEM analysis of single geogrid-encased stone columns under unconfined compression: a parametric study”, Acta Geotechnica, 12(3), 559-572.
Gu, M., Han, J. and Zhao, M., (2017). “Three-dimensional Discrete-Element method analysis of stresses and deformations of a single geogrid-encased stone column”, International Journal of Geomechanics, 17(9), 1-14.
Haghbin, M. and Ghazavi, M. (2016). “Seismic bearing capacity of strip footings on pile-stabilized slopes”, Civil Engineering Infrastructures Journal, 49(1), 111-126.
Hajiazizi, M., Nasiri, M. and Mazaheri, A.R. (2018). “The effect of fixed piles tip on stabilization of earth slopes”, Scientia Iranica, Transactions A: Civil Engineering, 25(5), 2550-2560.
Hajiazizi, M. and Nasiri, M. (2018). “Experimental and numerical comparison between reinforced earth slope using ordinary stone column and rigid stone column”, International Journal of Mining and Geo-Engineering (IJMGE), 52(1), 23-30.
Hajiazizi, M. and Nasiri, M. (2016). “Experimental studies of cohesion effect on stability of soil slopes reinforced with stone column”, Modares Civil Engineering Journal (M.C.E.J.), 16(5), 65-78.
Han, J. and Ye, S.L. (2002). “A theoretical solution for consolidation rates of stone column-reinforced foundation accounting for smear and well resistance effects”, International Journal of Geomechanics, 2(2), 135-151.
Han, J. and Ye, S.L. (2001). “A simplified method for computing consolidation rate of stone column reinforced foundations”, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 127(7), 597-603.
Hegde, A.M. and Sitharam, T.G. (2015). “Experimental and numerical studies on protection of buried pipe line sand underground utilities using geocells”, Geotextiles and Geomembranes, 43(5), 372-381.
Hughes, J.M.O., Withers, N.J. and Greenwood D.A. (1975). “A field trial of the reinforcing effect of a stone column in soil”, Geotechnique, 25(1), 31-44.
Khabbazian, M., Meehan, C.L. and Kaliakin, V., (2014). “Column supported embankments with geosynthetic encased columns: Parametric study”, Transportation Infrastructure Geotechnology, 1, 301-325.
Kempfert, H.G. (2003). “Ground improvement methods with special emphasis on column-type techniques”, International Workshop on Geotechnics of Soft Soils, Theory and Practice, Netherlands, 101–112.
Lai, H.J., Zheng, J.J., Zhang, J., Zhang, R.J. and Cui, L. (2014). “DEM analysis of “soil”-arching within geogrid-reinforced and unreinforced pile-supported embankments”, Computers and Geotechnics, 61, 13-23.
Madhav, M.R. and Miura, N. (1994). “Soil improvement panel report on stone columns”, Proceedings of the 13th International Conference on Soil Mechanics and Foundation Engineering, New Delhi, India, 163-164.
Marandi, S.M., Anvar, M. and Bahrami, M. (2016). “Uncertainty analysis of embankment built on stone column improved soft soil using fuzzy logic α-cut technique”, Computers and Geotechnics, 75, 135-144.
Mofidi, J., Farzaneh, O. and Askari, F. (2014). “Bearing capacity of strip footing near slopes using lower bound limit analysis”, Civil Engineering Infrastructures Journal, 47(1), 89-109.
Sawwaf, M. (2005). “Strip footing behavior on pile and sheet pile-stabilized sand slope”, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 131(6), 705-715.
Sivakumar, V., McKelvey, D., Graham, J. and Hughes, D. (2004). “Triaxial test on model sand columns in clay”, Canadian Geotechnical Journal, 41, 299-312.
Yoo, C. (2015). “Settlement behavior of embankment on geosynthetic encased stone column installed soft ground, A numerical investigation”, Geotextile and Geomembranes, 43(6), 484-492.
Zhang, C., Jiang, G., Liu, X. and Buzzi, O. (2016). “Arcing in geogrid-reinforced pile-supported embankments over silty clay of medium compressibility: Field data and analytical solution”, Computers and Geotechnics, 77, 11-25.