Performance of Circular Footing with Vertical Reinforced Sand Bed Resting Adjacent to Sloping Ground

Abstract

In the present investigation, load intensity versus settlement behaviour of circular shaped footing on sloping sand layer without and with vertical reinforcement. Experiments were conducted and bearing capacity ratio were calculated at 25 mm settlement of footing. The influences of vertical reinforcement on load intensity were compared with unreinforced condition in dry and saturated state. To achieve above condition, slopping sand bed were prepared with relative density of 67% by using sand raining technique. The vertical reinforcement was placed at the edge of slopping ground and 10 mm away from the edge of footing and test were also conducted with U/B=0.625,1.250 and 1.875. In each U/B ratio test were conducted by varying number of reinforcement (N) that is N=1, 3, 5 and 7 and by varying inclination of reinforcement with horizontal at 30, 45, 60 and 90 degree. From the results it was found that 96.29 % improvement in bearing capacity ratio with U/B ratio 1.250 with five numbers of vertical reinforcement at 900 degrees compared with unreinforced condition in dry state. The marginal decrements in bearing capacity ratio of 40 % were noticed in saturated state.