Basic Settlement-Influence Factor Io
The basic settlement-influence factor Io depends on the pile length l and diameter d and the values of this coefficient are generally provided by the following graph also showing their ranges:
Basic settlement-influence factor Io
These graphs are implemented in the program in a digital format.
Poulos, H. G. et. Davis, E. H.: Pile Foundations Analysis and Design. New York: John Wiley and Sons, 1980, chapter 5.3.3, pp. 89 (figure 5.18).