Construction works in the centre of Frankfurt have already started.
Despite performing careful demolition works, the walls and floor slabs had to remain underground, to avoid affecting adjacent buildings. These reinforced concrete structures must be removed in order to make room for the construction of diaphragm walls. For this purpose, three large drilling rigs are employed (Soilmec SR-90, SR-95 and SR-125), which drill the underground elements and take them out.