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DIN 4017

The solution is based on German standard DIN 4017, where the bearing capacity of foundation soil is given by the formula:

where:

bearing capacity factors:

for:

for:

shape factors:

for:

for:

inclination factors for φ > 0:

for: *

for:

where:

for:

for:

inclination factors for φ = 0:

ground factors:

for:

for:

for:

for:

for:

for:

base factors:

for:

for:

for:

for:

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

Nc, Nd, Nb

-

bearing capacity factors

sc, sd, sb

-

shape factors

ic, id, ib

-

inclination factors

gc, gd, gb

-

ground factors

bc, bd, bb

-

base factors

φ

-

angle of internal friction of soil

l

-

length of the foundation

δ

-

angle of deviation of the resultant force from the vertical direction

β

-

slope of the terrain

α

-

slope of the footing bottom

T

-

horizontal component of the resultant load

ω

-

angle between the horizontal component of resultant load T and the longer axis of footing (in the direction lef)

* Note: The program performs analysis for both orientations of load inclination and uses more unfavourable value.

Orientation of load inclination

Literature:

DIN 4017:2006-03

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