Stone Column–Stabilized Soft-Soil Performance Influenced by Clogging and Lateral Deformation: Laboratory and Numerical Evaluation
Publication: International Journal of Geomechanics
Volume 18, Issue 6
Abstract
Stabilizing the soft clay by stone column reinforcement is one of the most accepted methods of ground improvement techniques. Because of their larger diameter and higher hydraulic conductivity, drainage with stone columns is much faster than prefabricated vertical drains (PVDs) or sand compaction piles (SCPs). Still, a significant hydraulic gradient at the soil-column interface induces migration of clay particles into the column pores, leading to clogging, which adversely affects the consolidation rate of soft soil. The load bearing capacity that stone columns acquire depends primarily on the lateral confinement offered by the surrounding soft soil. Because of limited confinement at shallow depths, the stone column deforms laterally leading to bulging. This paper presents an in-depth study on the load settlement and consolidation characteristics of soft clay stabilized by stone columns with particular reference to clogging and lateral deformation via laboratory model tests and numerical analysis. The laboratory investigation includes one-dimensional consolidation tests with instrumented columns in reconstituted soft clay, X-ray computed tomography (CT) scanning to study the load transfer, column deformation and clogging characteristics, and a numerical analysis based on a fast Lagrangian finite-difference technique with associated subroutines. Previous solutions developed by the authors have been substantially modified to accommodate a time dependency of clogging, load transfer, and lateral deformation of columns. The proposed solutions are validated by experimental results, which demonstrate that the load settlement and column deformation pattern as well as the consolidation characteristics are significantly affected by clogging and lateral deformation of stone column.
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Acknowledgments
The authors gratefully acknowledge the financial support received from the Australian Research Council (ARC) and industry partners, namely, Coffey Geotechnics and Keller Ground Engineering, in the form of an industry linkage project. The assistance of Dr. Ana Heitor, Senior Lecturer of University of Wollongong, Australia, received during the CT scan is also acknowledged. Necessary administrative support received from Professor Roger Lewis, Associate Dean of Research, Faculty of Engineering and Information Sciences, University of Wollongong, Australia, has been acknowledged as well.
References
Adalier, K., and Elgamal, A. (2004). “Mitigation of liquefaction and associated ground deformations by stone columns.” Eng. Geol., 72(3–4), 275–291.
Altinbalik, T., and Can, Y. (2011). “An upper bound analysis and determination of the barrelling profile in upsetting.” Indian J. Eng. Mater. Sci., 18(Dec), 416–424.
Ambily, A., and Gandhi, S. (2007). “Behavior of stone columns based on experimental and FEM analysis.” J. Geotech. Geoenviron. Eng., 405–415.
Barron, B. A. (1948). “Consolidation of fine-grained soil by drain wells.” Trans. Am. Soc. Civ. Engrg., 113, 712–748.
Basack, S., Indraratna, B., and Rujikiatkamjorn, C. (2016a). “Analysis of the behaviour of stone column stabilized soft ground supporting transport infrastructure.” Procedia Eng., 143, 347–354.
Basack, S., Indraratna, B., and Rujikiatkamjorn, C. (2016b). “Modeling the performance of stone column reinforced soft ground under static and cyclic loads.” J. Geotech. Geoenviron. Eng., 04015067.
Basack, S., Indraratna, B., Rujikiatkamjorn, C., and Siahaan, F. (2015). “Theoretical and numerical perspectives on performance of stone column improved soft ground with reference to transport infrastructure.” Ground improvement: Case studies, B. Indraratna, C. Jian, and C. Rujikiatkamjorn, eds., 1, Butterworth-Heinemann, Oxford, U.K., 747–795.
Basack, S., Indraratna, B., Rujikiatkamjorn, C., and Siahaan, F. (2017). “Modeling the stone column behaviour in soft ground with special emphasis on lateral deformation.” J. Geotech. Geoenviron. Eng., 04017016.
Black, J., Sivakumar, V., and McKinley, J. D. (2007). “Performance of clay samples reinforced with vertical granular columns.” Can. Geotech. J., 44(1), 89–95.
Bouassida, M., and Carter, J. (2014). “Optimization of design of column reinforced foundations.” Int. J. Geomech., 04014031.
Bryan, M., James, M., and Jonathan, B. (2007). “Ground improvement using the vibro-stone column technique.” 〈https://www.engineersireland.ie/EngineersIreland/media/SiteMedia/groups/societies/geotechnical/Ground-Improvement-using-the-Vibro-Stone-Column-Technique.pdf?ext=.pdf〉.
Castro, J., and Sagaseta, C. (2009). “Consolidation around stone columns: Influence of column deformation.” Int. J. Numer. Anal. Methods Geomech., 33(7), 851–877.
Castro, J., and Sagaseta, C. (2011). “Deformation and consolidation around encased stone columns.” Geotext. Geomembr., 268–276.
Das, A., and Deb, K. (2017). “Response of cylindrical storage tank foundation resting on tensionless stone column-improved soil.” Int. J. Geomech., 04016035.
Deb, K. (2010). “A mathematical model to study the soil arching effect in stone column-supported embankment resting on soft foundation soil.” Appl. Math. Modell., 34(12), 3871–3883.
Deb, K., and Behera, A. (2017). “Rate of consolidation of stone column–improved ground considering variable permeability and compressibility in smear zone.” Int. J. Geomech., 04016128.
Deb, K., and Shiyamalaa, S. (2016). “Effect of clogging on rate of consolidation of stone column-improved ground by considering particle migration.” Int. J. Geomech., 04015017.
DicomWorks V 1.3.5 [Computer software]. OFFIS, Oldenburg, Germany.
Fatahi, B., Basack, S., Premananda, S., and Khabbaz, H. (2012). “Settlement prediction and back analysis of young’s modulus and dilation angle of stone columns.” Aust. J. Civil Eng., 10(1), 67–80.
Golait, S., and Padade, A. (2017). “Analytical and experimental studies on cemented stone columns for soft clay ground improvement.” Int. J. Geomech., 04016100.
Han, J., and Ye, S. (2001). “Simplified method for consolidation rate of stone column reinforced foundations.” J. Geotech. Geoenviron. Eng., 597–603.
Han, J., and Ye, S. (2002). “A theoretical solution for consolidation rates for stone column reinforced foundations accounting for smear and well resistance effects.” Int. J. Geomech., 135–151.
Heitor, A. P. (2013). “Assessment of post-compaction characteristics of an unsaturated silty sand.” Ph.D. thesis, School of Civil, Mining and Environmental Engineering, Univ. of Wollongong, Wollongong City, NSW, Australia.
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.” Géotechnique, 25(1), 31–44.
Indraratna, B., Basack, S., and Rujikiatkamjorn, C. (2013). “Numerical solution to stone column reinforced soft ground considering arching, clogging and smear effects.” J. Geotech. Geoenviron. Eng., 377–394.
Indraratna, B., Ngo, N., Rujikiatkamjorn, C., and Sloan, S. W. (2015). “Coupled discrete element-finite difference method for analysing the load-deformation behaviour of a single stone column in soft soil.” Compt. Geotech., 63, 267–278.
Joardar, H., Das, N. S., Sutradhar, G., and Singh, S. (2013). “Barreling of solid composite (Lm6/Sicp) cylinders under uni axial compressive load.” Int. J. Appl. Sci. Eng. Res., 2(4), 435–445.
Kirsch, K., and Bell, A. (2012). Ground improvement, 3rd Ed., CRC Press, Boca Raton, FL.
Krumbein, W. C., and Sloss, L. L. (1963). Stratigraphy and sedimentation, 2nd Ed., Freeman and Company, San Francisco.
Kulhawy, F. H. (1984). “Limiting tip or side resistance: Fact or fallacy.” Proc., ASCE Symp. on Analysis and Design of Pile Foundations, ASCE, Reston, VA, 80–98.
Kulkarni, K. M., and Kalpakjian, S. (1969). “A study of barreling as an example of free deformation in plastic working.” J. Eng. Ind., 91(3), 743–754.
Lambe, T. W., and Whitman, R. V. (1969). Soil mechanics, Wiley, New York.
La Rochelle, P., Sarrailh, J., Tavenas, F., Roy, M., and Leroueil, S. (1981). “Causes of sampling disturbance and design of a new sampler for sensitive soil.” Canadian Geotech. J., 18, 52–66.
Lorenzo, G., and Bergado, D. (2004). “Fundamental parameters of cement-admixed clay–new approach.” J. Geotech. Geoenviron. Eng., 1042–1050.
Lu, M., Jing, H., Zhou, Y., and Xie, K. (2017). “General analytical model for consolidation of stone column–reinforced ground and combined composite ground.” Int. J. Geomech., 04016131.
Lu, M. M., Xie, K. H., and Guo, B. (2010). “Consolidation theory for a composite foundation considering radial and vertical flows within the column and the variation of soil permeability within the disturbed soil zone.” Can. Geotech. J., 47(2), 207–217.
Madhav, M. R., and Van Impe, W. F. (1994). “Load transfer through a granular bed on a stone column reinforced soil.” J. Geotech. Engrg., 25(2), 47–62.
MATLAB [Computer software]. MathWorks, Natick, MA.
McKelvey, D., Sivakumar, V., Bell, A., and Graham, J. (2004). “Modelling vibrated stone columns in soft clay.” Proc. Inst. Civ. Eng. Geotech. Eng., 157(GE3), 137–149.
Muir Wood, D., Hu, W., and Nash, D. F. T. (2000). “Group effects in stone column foundations: Model tests.” Géotechnique, 50(6), 689–698.
Oda, M., and Kazama, H. (1998). “Microstructure of shear bands and its relation to the mechanisms of dilatancy and failure of dense granular soils.” Géotechnique, 48(4), 465–481.
Oda, M., Takemura, T., and Takahashi, M. (2004). “Microstructure in shear band observed by microfocus X-ray computed tomography.” Géotechnique, 54(8), 539–542.
Parsa-Pajouh, A., Fatahi, B., and Khabbaz, H. (2016). “Experimental and numerical investigations to evaluate two-dimensional modeling of vertical drain assisted preloading.” Int. J. Geomech., B4015003.
Puech, P. A., Boussel, L., Belfkih, S., Lemaitre, L., Douek, P., and Beuscart, R. (2007). “DicomWorks: Software for reviewing DICOM studies and promoting low-cost teleradiology.” J. Digital Imaging, 20(2), 122–130.
Pugh, R. S. (2017). “Settlement of floor slabs on stone columns in very soft clays.” Proc. Inst. Civ. Eng. Geotech. Eng., 170(1), 16–26.
Raju, V. R. (1997). “The behaviour of very soft soils improved by vibro replacement.” Proc., Ground Improvement Conf, British Geotechnical Society, London, 253–259.
Raju, V. R., Hari Krishna, R., and Wegner, R., (2004). “Ground improvement using vibro replacement in Asia–1994 to 2004, a 10 year review.” Proc., 5th Int. Conf. Ground Improvement Technology, CI-Premier, Malaysia.
Roscoe, K. H. (1970). “The influence of strains in soil mechanics: 10th Rankine lecture.” Géotechnique, 20(2), 129–170.
Roscoe, K. H., and Burland, J. B. (1968). “On the generalised stress-strain behaviour of ‘wet’ clay.” Engineering plasticity, J. Heyman and F. A. Leckie, eds., Cambridge University Press, 535–609.
SAA (Standards Association of Australia). (2001). “Soil strength and consolidation tests—Determination of permeability of a soil—Falling head method for a remoulded specimen.” AS 1289.6.7.2, Sydney, Australia.
Shahu, T. F., Hayashi, S., and Madhav, M. R. (2000). “Analysis of soft ground reinforced by non-homogenous granular pile-mat system.” Lowland Technol. Int., 2(2), 71–82.
Siahaan, F., Indraratna, B., Rujikiatkamjorn, C., and Basack, S., (2014). “Vertical stresses in stone column and soft clay during one-dimensional consolidation test.” Proc., Southeast Asia Conf. on Soft Soils Engineering and Ground Improvement 2014, Indonesian Geotechnical Society, Indonesia.
Siahaan, F., Kelly, R., and Wong, P., (2011). “Performance of an embankment constructed on stone columns.” Proc., Int. Conf. Advances in Geotechnical Engineering, Australian Geomechanics Society, Australia, 943–949.
Sivakumar, V., Jeludine, D. K. N. M., Bell, A., Glynn, D. T., and Mackinnon, P. (2011). “The pressure distribution along stone column in soft clay under consolidation and foundation loading.” Géotechnique, 61(7), 613–620.
Skempton, A. W. (1954). “The pore-pressure coefficients A and B.” Géotechnique, 4(4), 143–147.
Sridharan, A., and Prakash, K. (2002). “Permeability of two-layer soils.” Geotech. Testing J., 25(4), 443–448.
Timoshenko, S. P., and Goodier, J. P. (1970). Theory of elasticity, McGraw-Hill, New York.
Wang, G. (2009). “Consolidation of soft soil foundations reinforced by stone columns under time dependent loading.” J. Geotech. Geoenviron. Eng., 1922–1931.
Weber, T. M., Plotze, M., Laue, J., Peschke, G., and Springman, S. M. (2010). “Smear zone identification and soil properties around stone columns constructed in-flight in centrifuge model tests.” Géotechnique, 60(3), 197–206.
Winterkorn, H. F., and Fang, H. Y. (1975). Foundation engineering handbook, Van Nostrand Reinhold, New York.
Zhang, L., and Zhao, M. (2015). “Deformation analysis of geotextile-encased stone columns.” Int. J. Geomech., 04014053.
Zhang, L., Zhao, M., Shi, C., and Zhao, H. (2013). “Settlement calculation of composite foundation reinforced with stone columns.” Int. J. Geomech., 248–256.
Zomorodian, A., and Eslami, A. (2005). “Determining the geotechnical parameters of stabilized soils by stone column based on SPT results.” Electron. J. Geotech. Eng., 10A.
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International Journal of Geomechanics
Volume 18 • Issue 6 • June 2018
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© 2018 American Society of Civil Engineers.
History
Received: May 23, 2017
Accepted: Nov 28, 2017
Published online: Apr 10, 2018
Published in print: Jun 1, 2018
Discussion open until: Sep 10, 2018
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