)
dfn = do √ t, (1)
t
,
23-01 .
d , 0,23, 0,28, ,
0,3.
do =0.23
t = 19.2+16.7+10.1+0.1+10.47+17.5=74
dfn = 0.23*√74=1.98
) df, ,
df = kh×dfn , (2)
[ 2.02.01-83]
kh ,
,
1 [ 2.02.01-83];
df = 1.98×0,85=1.68
1,97 -3,200 2.5
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