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Table 9.2.12.

Load slope inclination factors i_q and i_y for undrained soils.

δ_R=

0°

5°

10°

15°

20°

25°

30°

i_q

--

1.00

0.80

0.63

0.49

0.37

0.27

0.18

i_y

α= 0°

1.00

0.73

0.52

0.35

0.23

0.14

0.08

10°

1.00

0.74

0.53

0.37

0.24

0.15

0.08

20°

1.00

0.74

0.54

0.38

0.26

0.16

0.09

where:

c

-

cohesion of soil

q₀

-

equivalent uniform load accounting for the influence of foundation depth

d

-

depth of the footing bottom

γ₁

-

unit weight of soil above the footing bottom

b

-

width of foundation

γ

-

unit weight of soil

N_e, N_d, N_b

-

bearing capacity factors

s_e, s_d, s_b

-

shape factors

d_e, d_d, d_b

-

depth factors

i_e, i_d, i_b

-

inclination factors

b_e, b_d, b_b

-

base factors

g_e, g_d, g_b

-

ground factors

φ

-

angle of internal friction of soil

l

-

length of the foundation

δ

-

angle of deviathon of the resultant force from the vertical direction

β

-

shape of the terrain

α

-

slope of the footing bottom

T

-

horizontal component of the resultant load