3D Numerical Analysis of Stone Columns Reinforced with Horizontal and Vertical Geosynthetic Materials
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3D Numerical Analysis of Stone Columns Reinforced with Horizontal and Vertical Geosynthetic Materials

Authors: R. Ziaie Moayed, A. Khalili

Abstract:

Improvement and reinforcement of soils with poor strength and engineering properties for constructing low height structures or structures such as liquid storage tanks, bridge columns, and heavy structures have necessitated applying particular techniques. Stone columns are among the well-known methods applied in such soils. This method provides an economically justified way for improving engineering properties of soft clay and loose sandy soils. Stone column implementation in these soils increases their bearing capacity and reduces the settlement of foundation build on them. In the present study, the finite difference based FLAC3D software was used to investigate the performance and effect of soil reinforcement through stone columns without lining and those with geosynthetic lining with different levels of stiffness in horizontal and vertical modes in clayey soils. The results showed that soil improvement using stone columns with lining in vertical and horizontal modes results in improvement of bearing capacity and foundation settlement.

Keywords: Bearing capacity, FLAC3D, geosynthetic, settlement, stone column.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1315501

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References:


[1] Kempfert, G. H. and Gebreselassie, B. (2006), “Excavation and Foundation in Soft Soils”, Springer-Verlag Berlin Heidelberg.
[2] Etezad, M., Hanna, A. M. and Ayadat, T., "Numerical model for group of stone Columns ", Proc. 73rd Annual Meeting of ICOLD, Tehran, Iran 2005; paper No. 097-OT.
[3] Barksdale, R. D., and Bachus, R. C. (1225), “Design and Construction of Stone Columns”, Federal Highway Administration, Vol. 1, Report No. FHWA/RD-25/022, National Technical Information Service, Springfield, Virginia, USA.
[4] Ghazavi, M., and Afshar, J. N. (2015), “Bearing capacity of geosynthetic encased stone columns,” Geotextiles and Geomembranes, Vol. 52, pp. 22-52.
[5] Van Impe, W. F., 1989. Soil Improvement Techniques and Their Evolution. Balkema, Rotterdam, the Netherlands.
[6] Gniel, J., Bouazza, A., 2008. Improvement of soft soils using geogrid encased stone columns. Geotextiles and Geomembrances 27(3), 167e175.
[7] Arvizhi, Mal, and il Amparuthi. “Comparative study on the behavior of encased stone column and conventional stone column. “Soil and foundation 47, NO.5 (2007):873-885.
[8] Ayadat, T., Hanna, A.M., 2005. Encapsulated stone columns as a soil improvement technique for collapsible soil. Ground improvement 9(4), 137-147.
[9] Mohapatra, S. R, Rajagopal, K, Sharma, J. (2016), ‘’ Direct shear tests on geosynthetic-encased granular columns”, Geotextiles and Geomembranes, Vol.44. pp. 396-405.
[10] Shivashankar, R. and Dheerendra Babu, M. R. S. and Nayak, S. and Rajathkumar, V. (2011), “Experimental Studies on Behaviour of sone column in Layered Soils” Geotechnical and Geological Engineering. 29, pp 749-757.
[11] Murugesan, S., and Rajagopal, K. (2002), “Geosynthetic-encased stone columns: numerical evaluation, ”Geotextiles and Geomembranes, Vol. 24, pp. 542-512.
[12] Makarchian, M, Hamidi, A, (2016), ‘‘Laboratory study of the bearing capacity compound encased stone column (Horizontal and Vertical) with Geosynthetic’’. 9th National Congress on Civil Engineering, Ferdowsi University of Mashhad, Iran.
[13] Jamali Moghadam, M. Hajiyan niya, A. MOyedi, H. Nazem, R. (2016), ‘‘Investigate the behavior of encased stone columns with using geogrid’’ International conference of Civil Architecture & Urban Planning Elites, Shahid Beheshti University Tehran, Iran.
[14] Cai, F., Li, G.X., 1994. Granular piles reinforced with geosynthetics. In: Proceedings of the Fifth International Conference on Geotextiles, Geomembranes and Related Products, Singapore, vol. 1, pp. 347e350.