• Sabahat Yahya
• Malik Mohammad Sayim

Jhelum River (Vyeth in Sanskrit) which originates from Verinag spring in South Kashmir is essentially the lifeline of Kashmir valley, forming the backbone of all its economic activities. However, Jhelum River is also the cause of large and small scale flooding in the region and one of the most disastrous floods occurred in September 2014. In view of this, various flood control measures have been suggested and one among them is flood spill channel which transport excess water from main river body during inundating. But unfortunately, the present capacity of the channel has decreased due to the encroachments and sediment deposition in the river and flood channel over the years. In such a scenario, the threat of flooding is evident and thus various proposals are being formulated, one among them being dredging out sediment deposited in the bed of the flood channel. Dredging of the river bed and flood channels produces dredged soil in large amount posing serious 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 0.95 ᵧdmax 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,direct shear test, unconfined compression test, plate load test, reinforced soil, area replacement ratio,bearing capacity.

"INFLUENCE OF STONE COLUMNS ON BEARING CAPACITY 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.803-812, June 2019, Available :http://www.jetir.org/papers/JETIR1907N12.pdf

"INFLUENCE OF STONE COLUMNS ON BEARING CAPACITY 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. pp803-812, June 2019, Available at : http://www.jetir.org/papers/JETIR1907N12.pdf