(e) Volume and Weight of Stones in Secondary Cover Layer. 



(12.0 - 9.91 XlOO ) 209 



A = : = — : = area per 100 m of structure 



sin 6 sin 



Number of stones in secondary cover layer: 



(g w 



a/3 



R 



r . = n k, , ,^ 

 A A I 10 w 



(Wd in metric tons and w = unit 

 weight of rock = 25.92 kN/m^) 



'a /^° %^ ^^^ 

 n = -j— I — - — I = number of layers 



A \^ R 



^R-^-\V- ^][rw^ 



,2/3 



N^= A 



•^A U "^R 



1/3 



u n 37 \l ^Q "r- 

 "a I' 100 II g w^ 



2/3 



N„ = 



6.3 Ar . w 

 A V 



R g W 



R 



Volume of secondary cover layer: 



V=r^A 

 Volume of rock in secondary cover layer; 



V„ = 0.63V 



n 



Weight of Rock; 



g w 



W = —777- N„ or W = 0.63 V w 

 10 /? V 



8-60 



