Pile Shaft Resistance
Pile shaft resistance is given by:
where: | τs,i | - | unit pile shaft resistance in the ith layer |
As,i | - | area of the pile shaft in the ith layer |
Unit pile shaft resistance for drained soils is given by:
where: | σef | - | effective stress in the soil layer |
Ks | - | ||
f | - | ||
φ | - | angle of internal friction | |
τs,max | - | maximum limit for unit pile shaft resistance |
According to CTE-DB SE-C the maximum limit for unit pile shaft resistance in drained soil is 120 kPa.
For undrained soils, the following expression holds:
where: | cu | - | undrained shear strength of soil |
τs,max | - | maximum limit for unit pile shaft resistance |
According to CTE-DB SE-C the maximum limit for unit pile shaft resistance in undrained soil is 100 kPa.