Coefficients of Resistance α a β
The pile base coefficient α depends on the pile type. Its value is automatically calculated according to the pile and soil types or it can be entered manually by the user.
Piles | α for sand | α for clay | α for silt |
prefabricated driven piles or steel piles | 1.0 | 1.0 | 1.0 |
Franki piles | 1.0 | 1.0 | 1.0 |
driven wooden piles | 1.0 | 1.0 | 1.0 |
vibrating or vibropressed | 1.0 | 1.0 | 1.0 |
cast in place screw piles | 1.0 | 1.0 | 1.0 |
prefabricated screw piles | 1.0 | 1.0 | 1.0 |
cast in place screw piles with additional grouting | 1.0 | 1.0 | 1.0 |
prefabricated screw piles with additional grouting | 1.0 | 1.0 | 1.0 |
steel tubular piles | 1.0 | 1.0 | 1.0 |
Continuous Flight Auger piles (CFA) | 0.3 | 0.3 | 0.3 |
bored piles or piles sheeted by bentonite suspense | 0.5 | 0.85 | 0.6 |
bored piles with steel casing | 0.5 | 0.85 | 0.6 |
root pile | 0.5 | 0.85 | 0.6 |
strauss pile | 0.5 | 0.85 | 0.6 |
The pile shaft coefficient β is automatically determined according to the pile and soil types or it can be entered manually by the user.
Piles | β for sand | β for clay | β for silt |
prefabricated driven piles or steel piles | 1.0 | 1.0 | 1.0 |
Franki piles | 1.0 | 1.0 | 1.0 |
driven wooden piles | 1.0 | 1.0 | 1.0 |
vibrating or vibropressed | 1.0 | 1.0 | 1.0 |
cast in place screw piles | 1.0 | 1.0 | 1.0 |
prefabricated screw piles | 1.0 | 1.0 | 1.0 |
cast in place screw piles with additional grouting | 1.0 | 1.0 | 1.0 |
prefabricated screw piles with additional grouting | 1.0 | 1.0 | 1.0 |
steel tubular piles | 1.0 | 1.0 | 1.0 |
Continuous Flight Auger piles (CFA) | 1.0 | 1.0 | 1.0 |
bored piles or piles sheeted by bentonite suspense | 0.6 | 0.9 | 0.75 |
bored piles with steel casing | 0.5 | 0.8 | 0.65 |
root pile | 1.5 | 1.5 | 1.5 |
strauss pile | 0.5 | 0.8 | 0.65 |