ABSTRACT
The installation process of piles influences the surrounding soil depending on the installation method. Several investigations have been performed to comprehend the influence of installation effects on pile bearing capacity, see for example (De Beer 1988, Peiffer & Van Impe 1993, Hartung 1994, Schmitt 2004). (Peiffer & Van Impe 1993) and (Peiffer 2009) investigated the development of the stress state around the pile during the pile installation processes. It is obvious, that the installation process changes the stress state and the void ratio in the surrounding soil. Therefore, there are differences between the results of cone penetration tests done before and after pile installation, see e.g. (De Beer 1988, Van Weele 1988, Peiffer & Van Impe 1993) and (Busch, Grabe, Gerressen, & Ulrich 2010).
