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bearing capacity factors:

for:

              for:

shape factors:

depth factors:

inclination factors:

where:

c_d

-

design value of soil cohesion

q'

-

effective vertical stress at the level of footing bottom

D

-

depth of the footing bottom

γ'

-

unit weight of soil

B'

-

effective width of foundation

φ_d

-

design value of soil friction angle

L'

-

effective length of foundation

δ

-

angle of deviation of the resultant force from the vertical direction