At a construction site in the centre of Rotterdam, several sheet piles had to be installed. Preliminary calculations based on the method of Hergarden showed that large soil settlements at the location of an underground water duct could cause damage to it. Measurements of the soils settlement have been taken during both the vibratory installation and removal of sheet piles. Two types of prediction of these effects have been carried out: an advanced and a straightforward method. The predicted settlements at groundlevel have been compared to the measurements carried out during construction. The results show that the advanced method is conservative although easy to use. The calculated settlements seem to be consistent with the soil profiles. The straightforward method can be used for preliminary calculations.