ABSTRACT
The entrances of the High Speed Railway Line (HSL) from Amsterdam to the south are of interest due to the large depth below ground level and surcharge on top, the required very small differential tolerances between the sections and the soft subsoil, resulting in very long piles and low stiffness of the foundation. An extra complication was the crossing of the river dikes, which could cause large horizontal forces on the cofferdams and foundation during construction. The integration and optimisation of construction sequences and final structure required special measures.
