CFEM
This solution is based on the CFEM, which determines the bearing capacity of the foundation soil with the following formula:
Bearing capacity factors:
|
For contact type base-ground SMOOTH:
|
For contact type base-ground HARD/ROUGH:
|
Shape factors:
|
Inclination factors:
|
pro 
pro 
If H = HB (in the direction of the base width), then 
= 90°
If H = HL (in the direction of the base length), then 
= 0°
Other cases:
|
Depth factors:
|
pro 
pro 
If D/Bef > 1,0
|
If D/Bef ≤ 1,0
|
Inclination factors of the terrain:
|
pro 
pro 
Inclination factors of the footing bottom:
|
pro 
pro 
where: | qs | - | stress at the level of the foundation joint |
γ | - | unit weight of soil | |
Bef | - | effective width of foundation | |
Lef | - | effective length of foundation | |
V | - | vertical componenet of the resultant load | |
H | - | horizontal component of the resultant load | |
HB | - | horizontal component of the resultant load in the foundation with direction |
HL | - | horizontal component of the resultant load in the foundation length with direction | |
D | - | depth of the footing bottom | |
δ | - | angle of deviathon of the resultant force from the vertical direction |
β | - | slope of the terrain |
c | - | cohesion of soil |
φ | - | angle of internal friction of soil |
Literature: Canadian Foundation Engineering Manual, 4th Edition, 2006