The aim of this study was to improve the characteristics of natural collapsible soils using the geogrid-encased stone column technique. For this purpose, 20 large-scale specimens of stone columns were prepared using rigid metal cylinders with a diameter of 308 mm and a height of 97 to 154 mm according to the unit cell theory. The aspect ratio was 10% to 25%. For the occurrence of bulging failure, the height of the stone columns was considered six times the diameter. The stone columns were encased with geogrids of varying stiffness from 80 to 200 kN/m. The soil around the stone column inside the unit cell was compacted to similar site conditions. Loading was applied similar to the test, which determines the soil collapsibility potential while the specimens were being inundated from the bottom of the metal cylinder by a water feeding system. During loading, the vertical displacements of the stone columns were measured at two locations on the loading plate. The results showed that the columns settlement due to inundation diminished by increasing the stiffness of the encased stone columns and aspect ratio. The optimum aspect ratio was approximately 15%. Encasement of the stone columns increased the lateral pressure in the collapsible soil and prevented the collapse of the stone column. The settlement values of stone columns were compared with a settlement prediction model and showed a good agreement. The data obtained in this study can be used as a practical method to improve natural collapsible soils during inundation.
Pereira, J. F.H., and Fredlund, D.G., “Volume change behavior of collapsible compacted gneiss soil”, Journal Geotechnical and Geoenvironmental Engineering, Vol. 126, No. 10, (2000), 907-916. doi: 10.1061/(ASCE)1090-0241(2000)126:10(907).
Gaaver, Kh. E., “Geotechnical properties of Egyptian collapsible soils”, Alexandria Engineering Journal, Vol. 51, No. 3, (2012), 205-210. doi:10.1016/j.aej.2012.05.002.
Ayadat, T. and Hanna, A. M., “Assessment of soil collapse prediction methods”, International Journal of Engineering, Transactions B: Applications, Vol. 25, No. 1, (2012), 19-26. doi:10.5829/idosi.ije.2012.25.01b.03.
Mihajlovic, G., Zivkovic, M., “Sieving Extremely Wet Earth Mass by Means of Oscillatory Transporting Platform “, Emerging Science Journal, Vol. 4, No. 3, (2020), 172-182. doi: 10.28991/esj-2020-01221.
Fazelabdolabadi, B., Golestan, M. H., “Towards Bayesian Quantification of Permeability in Micro-scale Porous Structures – The Database of Micro Networks”, HighTech and Innovation Journal,Vol. 1, No. 4, ( 2020), 148-160. doi: 10.28991/HIJ-2020-01-04-02.
Ishihara, K., and Harada, K, “Cyclic behavior of partially saturated collapsible soils subjected to water permeation” Ground failures under seismic, No. 44, (1994), 34-50.
Houston, S. L., Houston, W. N., Zapata, C. E., and Lawrence, C., “Geotechnical engineering practice for collapsible soils” Journal of Geotechnical and Geological Engineering, No. 19, (2001), 333-355. doi: 10.1023/ A: 1013178 226615.
Lim, Y.Y. and Miller, G. A., “Wetting-induced compression of compacted Oklahoma soils” Geotechnical and Geoenvironmental Engineering, Vol. 130, No. 10,(2004), 1014-1023. doi: 10.1061/(ASCE) 1090-0241(2004) 130:10 (1014).
Jalili, M., Ghasemi, M. R., Pifloush, A. R., “Stiffness and Strength of Granular Soils Improved by Biological Treatment Bacteria Microbial Cements”, Emerging Science Journal, Vol. 2, No. 4, (2018), 219-227. doi: 10.28991/esj-2018-01146.
Hosseini, A., Haeri, S. M., Siavash Mahvelati, S., Fathi, A., “Feasibility of using electrokinetics and nanomaterials to stabilize and improve collapsible soils”, Journal of Rock Mechanics and Geotechnical Engineering, Vol. 11, No. 5, (2019), 1055-1065. doi: 10.1016/j.jrmge. 2019.06.004.
Haeri, M., Valishzadeh, A., “Evaluation of Using Different Nanomaterials to Stabilize the Collapsible Loessial Soil”, International Journal of Civil Engineering, No. 156, (2020). doi: 10.1007/s40999-020-00583-9.
Margherita, Z., Laura, E., Chiara, M. M., Roberto, S., Bartolomeo, M., “Collapsible intact soil stabilisation using non-aqueous polymeric vehicle”, Engineering Geology, Vol. 264, (2020), 105334. doi: 10.1016/j.enggeo. 2019.105334
Houston, W. N. and Houston, S. L., “State of the practice: Mitigation measures for collapsible soil sites”, Foundation Engineering,Current Principles and Practices, Evanston, IL, USA, (1989), 161-175.
Rollins, K. M. and Rogers, G. W., “Mitigation measures for small structures on collapsible alluvial soils” Journal of Geotechnical Engineering, Vol. 120, No. 9, (1994), 1533-1553. doi: 10.1061/(ASCE)0733-9410(1994)120:9(1533).
Ayadat, T., “Collapse of stone column foundations due to inundation”, Ph.D. Thesis, Sheffield University, Sheffield, United Kingdom, (1990).
Hanna, A., Soliman, S., “Experimental Investigation of Foundation on Collapsible Soils”, Journal of Geotechnical and Geoenvironmental Engineering, Vol. 143, No. 11, (2017), 1-12. doi: 10.1061/(ASCE)GT.1943-5606.0001750.
Almeida, M.S.S., Hosseinpour, I., Riccio, M., “Performance of a geosynthetic encased column (GEC) in soft ground: numerical and analytical studies”, Geosynthetics International, Vol. 20, No. 4, (2013), 252-262. doi: 10.1680/gein. 13.00015.
Murugesan, S., Rajagopal, K., “Geosynthetic-encased stone columns: numerical evaluation”, Geotextiles and Geomembranes, Vol. 24, No. 6, (2007), 349-358. doi: 10.1016 /j.geotexmem.2006.05.001.
Marandi, S.M., Anvar, M. and Bahrami, M., “Uncertainty analysis of safety factor of embankment built on stone column improved soft soil using fuzzy logic α cut technique”, Computers and Geotechnics, Vol. 75, No. 5, (2016), 135-144. doi: 10.1016/ j.compgeo.2016.01.014.
Alonso, J., Jimenez, R., “Reliability-based design of stone columns for ground improvement considering two settlement failure modes”The XVI European Conference on Soil Mechanics and Geotechnical Engineering: Geotechnical Engineering for Infrastructure and Development,Edinburgh, Scotland, November, (2015).
Demir, A., Sarici. T., “Bearing capacity of footing supported by geogrid encased stone columns on soft soil”, Geomechanics and Engineering, Vol. 12, No. 3, (2017), 417-439. doi:10.12989/gae.2017.12.3.417.
Alkhorshid, N.R., Araujo, P.L.S., Palmeira, E.M., Zornberg, J.G., “Large-scale load capacity tests on a geosynthetic encased column”, Geotextiles and Geomembranes, Vol. 47, No. 5, (2019), 632-641. doi:10.1016/j.geotexmem. 2019.103458.
Ghazavi, M., Nazariafshar, J., “Bearing Capacity of Geosynthetic Encased Stone Columns, Geotextiles and Geomembranes, Vol. 38, No. 6, (2013), 26-36. doi: 10.1016/j.geotexmem. 2013.04.003.
Barksdale, R.D., Bachus, R. C., “Design and construction of stone columns, Federal High way administration Office of Engineering and Highway Operations Research and Development, FHWA/RD-83/029”, School of Civil Engineering, Georgia, Georgia, UAS, (1983).
Poulos, H. G., Davis, E. R., Pile Foundation Analysis and Design, John Wiley & Sons, New York. N.Y., USA, (1980).
Ayadat, T., Hanna, A. M., “Encapsulated stone columns as a soil improvement technique for collapsible soil”, Ground Improvement, Vol. 9, No. 4, (2005), 137-147. doi: 10.1980/grim. 2005.9.4.137.
Bahrami, M., & Marandi, S. (2021). Large-Scale Experimental Study on Collapsible Soil Improvement Using Encased Stone Columns. International Journal of Engineering, 34(5), 1145-1155. doi: 10.5829/ije.2021.34.05b.08
M. Bahrami; S.M. Marandi. "Large-Scale Experimental Study on Collapsible Soil Improvement Using Encased Stone Columns". International Journal of Engineering, 34, 5, 2021, 1145-1155. doi: 10.5829/ije.2021.34.05b.08
Bahrami, M., Marandi, S. (2021). 'Large-Scale Experimental Study on Collapsible Soil Improvement Using Encased Stone Columns', International Journal of Engineering, 34(5), pp. 1145-1155. doi: 10.5829/ije.2021.34.05b.08
Bahrami, M., Marandi, S. Large-Scale Experimental Study on Collapsible Soil Improvement Using Encased Stone Columns. International Journal of Engineering, 2021; 34(5): 1145-1155. doi: 10.5829/ije.2021.34.05b.08