Rubble 



as Toe Protection 



Rubble Toe Protection 



W 



Wr H' 



and B = 0.4ds 



Rubble 



as Foundation 



Rubble Foundation 



0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 



(After Brebner end Donnelly, 1962) 

 Depth Ratio ^ 



Figure 7-120. Stability number N for rubble foundation and toe 

 protection. 



7-244 



