Abstract
The behavior of clay beds treated with ordinary and geosynthetic-encased stone columns under vertical loads is wisely well known. Since soil movements occurring in the field conditions may cause shear deformations in the stone columns, investigating the shear behavior of clay beds treated with stone columns is necessary. Also, a wide range of clays on the ground are wet (unsaturated) or dry in place, so this paper aims to experimentally investigate the shear strength parameters of untreated and treated wet clays by ordinary and encased stone columns by performing a series of large direct shear tests. For this purpose, the effect of some variables such as tensile stiffness and length of the encasement, frictional angle and size of column’s aggregates, diameter, number and arrangement of stone columns on shear strength parameters of such soils under various normal pressures are evaluated. The obtained results show a significant improvement in the shear strength behavior of the wet clay treated by stone columns due to geotextile encasement, but the rate of this improvement depends on physical and strength properties of stone columns and encasement.
Similar content being viewed by others
References
Baez JI, Martin GR (1992) Quantitative evaluation of stone column techniques for earthquake liquefaction mitigation. In: Proceedings of the 10th world conference on earthquake engineering, Balkema, Rotterdam, pp 1477–1483
Kumar S (2001) Reducing liquefaction potential using dynamic compaction and construction of stone columns. Geotech Geol Eng 19(2):169–182. https://doi.org/10.1023/A:1016672106067
Vrettos C, Savidis S (2004) Stone column ground improvement against liquefaction for the Preveza–Aktio immersed tunnel. In: Proceedings of the International conference on case histories in geotechnical engineering, New York, 12A-14, pp 1–9
Al-Homoud AS, Degen WS (2006) Marine stone columns to prevent earthquake induced soil liquefaction. Geotech Geol Eng 24:775–790
Young R, Gibson M, Newby G (2012) Seismic performance of ground improvements on Christchurch Southern Motorway. Aust Geomech 47(4):1–8. https://doi.org/10.3850/978-981-07-3560-9_08-0806
Shao LM, Taylor D, Koelling M (2013) Stone columns and earthquake drain liquefaction mitigation for federal center south in Seattle, Washington. In: Geo-congress 2013, San Diego, California, pp 864–878. https://doi.org/10.1061/9780784412787.089
Forcellini D, Tarantino AM (2014) Assessment of stone columns as a mitigation technique of liquefaction-induced effects during italian earthquakes. Sci World J 2014:1–9. https://doi.org/10.1155/2014/216278
Selcuk L, Kayabali K (2015) The design of stone column applications to protect against soil liquefaction. Int J Geotech Eng 9(3):279–288. https://doi.org/10.1179/1939787914Y.0000000063
Rao BG, Ranjan G (1985) Settlement analysis of skirted granular piles. J Geotech Eng 111(11):1264–1283. https://doi.org/10.1061/(ASCE)0733-9410(1985)111:11(1264)
Kempfert HG, Gebreselassie B (2006) Excavations and foundations in soft soils. Springer, Berlin
Raithel M, Kempfert HG (2000) Calculation models for dam foundations with geotextile coated sand columns. In: Proceedings of the international conference on geotechnical and geological engineering, Melbourne, GeoEng
Sharma SR, Phanikumar BR, Nagendra G (2004) Compressive load response of granular piles reinforced with geogrids. Can Geotech J 41(1):187–192. https://doi.org/10.1139/t03-075
Alexiew D, Brokemper D, Lothspeich S (2005) Geotextile encased columns (GEC): load capacity, geotextile selection and pre-design graphs. Contemp Issues Found Eng Geotech Spec Publ Geo-Front 2005(130–142):497–510
Murugesan S, Rajagopal K (2006) Geosynthetic encased stone columns: numerical evaluation. Geotext Geomembr 24(6):349–358. https://doi.org/10.1016/j.geotexmem.2006.05.001
Murugesan S, Rajagopal K (2007) Model tests on geosynthetic encased stone columns. Geosynth Int 14(6):346–354. https://doi.org/10.1680/gein.2007.14.6.346
Malarvizhi SN, Ilamparuthi K (2007) Comparative study on the behavior of encased stone column and conventional stone column. Soils Found 47(5):873–886. https://doi.org/10.3208/sandf.47.873
Gniel J, Bouazza A (2009) Improvement of soft soils using geogrid encased granular columns. Geotext Geomembr 27(3):167–175. https://doi.org/10.1016/j.geotexmem.2008.11.001
Gniel J, Bouazza A (2010) Construction of geogrid encased granular columns: a new proposal based on laboratory testing. Geotext Geomembr 28(1):108–118. https://doi.org/10.1016/j.geotexmem.2009.12.012
Murugesan S, Rajagopal K (2010) Studies on the behavior of single and group of geosynthetic encased stone columns. J Geotech Geoenviron Eng 136(1):129–139. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000187
Yoo C, Lee D (2012) Performance of geogrid-encased stone columns in soft ground: full-scale load tests. Geosynth Int 19(6):480–490. https://doi.org/10.1680/gein.12.00033
Ali K, Shahu JT, Sharma KG (2012) Model tests on geosynthetic-reinforced stone columns: a comparative study. Geosynth Int 19(4):292–305
Demir A, Sarıcı T, Laman M, Bağrıaçık B, Ok B (2013) An experimental study on behaviour of geosynthetic reinforced stone columns. In: Proceedings of the 2nd international Balkans conference on challenges of civil engineering, BCCCE, Epoka University, Tirana, Albania, pp 832–841
Ali K, Shahu JT, Sharma KG (2014) Model tests on single and groups of stone columns with different geosynthetic reinforcement arrangement. Geosynth Int 21(2):103–118
Zhang L, Zhao M (2015) Deformation analysis of geotextile-encased stone columns. Int J Geomech 15(3):04014053-1-10. https://doi.org/10.1061/(asce)gm.1943-5622.0000389
Murugesan S, Rajagopal K (2009) Shear load tests on stone columns with and without geosynthetic encasement. Geotech Test J 32(1):1–10. https://doi.org/10.1520/GTJ101219
Chen JF, Li LY, Xue JF, Feng SZ (2015) Failure mechanism of geosynthetic encased stone columns in soft soils under embankment. Geotext Geomembr 43(5):424–431
Mohapatra SR, Rajagopal K, Sharma J (2016) Direct shear tests on geosynthetic-encased granular columns. Soils Found 44:396–405. https://doi.org/10.1016/j.geotexmem.2016.01.002
Rajagopal K, Krishnaswamy NR, Latha GM (1999) Behaviour of sand confined with single and multiple geocells. Geotext Geomembr 17(3):171–184. https://doi.org/10.1016/S0266-1144(98)00034-X
Latha GM, Rajagopal K, Krishnaswamy NR (2006) Experimental and theoretical investigations on geocell-supported embankments. Int J Geomech 6(1):30–35. https://doi.org/10.1061/(ASCE)1532-3641(2006)6:1(30)
Acknowledgements
The laboratory study of this research was carried out in the Soil Mechanics Laboratory of Civil Engineering Department of Imam Khomeini International University. The authors are deeply grateful to laboratory persons.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Naeini, S.A., Gholampoor, N. Effect of Geotextile Encasement on the Shear Strength Behavior of Stone Column-Treated Wet Clays. Indian Geotech J 49, 292–303 (2019). https://doi.org/10.1007/s40098-018-0329-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40098-018-0329-z