Shaft Bearing Capacity
The vertical bearing capacity of the shaft is given by the formula:
where: | Rs | - | shaft resistance |
As | - | contact area | |
qs | - | skin friction |
Note: The contact area is calculated for rectangular and pile walls, for other cross-sections, it must be defined manually [m2/m, ft2/ft].
Determination of skin friction qs should be part of the geological survey.
Recommended values of peak resistance qs [kPa] can be found in professional literature, e.g. in EA-Pfähle book.