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Bearing Capacity Factor Nq

Reference values of the bearing capacity factor Nq are listed in the table. If jet grouting is used when constructing the pile, then the maximum angle of internal friction φ is equal to 28°.

Bearing capacity factor Nq

Angle of internal friction φ[°]

26

28

30

31

32

33

34

35

36

37

38

39

40

Bearing capacity factor Nq for driven piles

10

15

21

24

29

35

42

50

62

77

86

120

145

Bearing capacity factor

Nq for bored piles

5

8

10

12

14

17

21

25

30

38

43

60

72

Literature:

NAVFAC DM 7.2, Foundation and Earth Structures, U.S. Department of the Navy, 1984.