• Sabahat Yahya
• Malik Mohammad Sayim

Dredging of the river bed and flood channels produces dredged soil in large quantity posing severe health and environmental problems. Concern over environmental effects of dredging, disposal and the increasing unavailability of suitable disposal sites, has put pressure for characterization of this material. Therefore, the present study investigates the behaviour of dredged soil reinforced with stone columns. The dredged soil samples for the present study were collected from different locations of flood spill channel and characterised through laboratory testing. Test specimens were prepared with dredged soil at 0.95dmax and Optimum moisture content and subjected to different tests as per relevant standard procedures. In addition to this, a series of model footing load tests were carried out on stone column reinforced dredged soil bed to understand the load deformation behaviour. The parameters varied in this study were length and diameter of stone column. It was observed that the bearing capacity of the stone column reinforced soil bed increases with increase in the area replacement ratio along with significant reduction in settlement. In addition to this, the optimum length of the stone column was also obtained from the test results. A group based test was also done and compared with single stone column tests with similar area replacement ratio. Hence, due the inclusion of stone columns to the dredged soil, there is improvement in the bearing capacity and reduction in settlement.

dredging,vibro-replacement, backfill, atterberg limit, optimum moisture content,specific gravity

"INFLUENCE OF STONE COLUMNS ON ENGINEERING PROPERTIES OF DREDGED SOIL- AN EXPERIMENTAL INVESTIGATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.572-576, June 2019, Available :http://www.jetir.org/papers/JETIR1907M75.pdf

"INFLUENCE OF STONE COLUMNS ON ENGINEERING PROPERTIES OF DREDGED SOIL- AN EXPERIMENTAL INVESTIGATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp572-576, June 2019, Available at : http://www.jetir.org/papers/JETIR1907M75.pdf