Correction Factor for Pile Compressibility Rk
The correction factor Rk represents the pile stiffness in dependence on the pile-stiffness factor K for various ratios of the pile length to pile diameter (l/d). Its values are provided by the following graphs, that are implemented in the program in a digital format.
Compressibility correction factor for settlement Rk
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 5.19).