Description

Very loose

Loose

Medium

Dense

Very dense

Relative density D_r

0

0.15

0.35

0.65

0.85

SPT N’ Fine

Medium

coarse

1 - 2

2 - 3

3 - 6

3 - 6

4 - 7

5 - 9

7 - 15

8 - 20

10 - 25

16 - 30

21 - 40

26 - 45

?

˃40

˃45

Ф Fine

Medium

coarse

26 - 28

27 - 28

28 - 30

28 - 30

30 - 32

30 - 34

30 - 34

32 - 36

33 - 40

33 - 38

36 - 42

40 - 50

˂50

γ_wet, KN/m³

11 - 16^*

14 - 18

17 - 20

17 - 22

20-23