differences of Q and Oc, (Q - Q and (a^ - 0^0) are plotted against .y for all the data 

 points of the three series in Figures 6.5 and 6.6, respectively. The empirical 

 relationships shown in these figures are given by 



C = Cn-0.15 



^c =<^co+0-098 -0.002(5 -7)' 



(6.5) 

 (6.6) 









10 1.2 - 



i '-. 



1 0.8^ 



10.6 - 



CO 



(U 



2 0.2 - 































t 



























X. 



























1^.1 



» 

























^ 

























.•* 



^. 

























r'l 



u^ 

























• « 



V^ 



' ▼ 























d- 



























^ 



P 

























% 



b? 

























▼ 



^ 



,*" 

























^ 



> 

























y\ 



























^ 





























C 



1 2 4 6 8 10 12 

 Mean Damage, S 



1- 





• Series A' «» Series B' » Series C" Eq. 6.5 













Figure 6.5. Prediction of mean minimum cover depth as a function of mean damage for 

 Series A', fi', and C 



115 



