**8.3 Slope-reinforcement interaction**

Slope as in **Figure 21** has been analyzed further for the critical slip circle DEF of reinforced slope but without considering the effect of reinforcement to get FS of 1.41 (**Figure 23**).

The summary of results for various depth of reinforcement from top of embankment is summarized in **Table 5**.

The contribution of reinforcement in enhancing the stability of a slope is observed to be twofold: (i) shifting of the critical slip circle deeper in to the slope involving larger slide mass or forward involving smaller slide mass and thus enhancing the factor of safety of the slope and (ii) due to contribution of reinforcement to stabilizing force/moment. FSmin of 1.22 for unreinforced case increases to 1.41 due to shifting of the critical circle to DEF an increase of 15.6%. Secondly the contribution of reinforcement to stabilizing moment/force leads to a further increase in factor of safety from 1.41 to 1.51, a contribution of about 8.2%.
