ABSTRACT
The report presents two German railway tunnel projects, the construction of which demands high-quality engineering work regarding the given geotechnical, hydrogeological and administrative conditions. Both tunnel projects are characterized by the undergoing well-developed inner urban areas within comparative soft soils but different tunnelling techniques. The report will focus on measures that have been taken to guarantee minimal settlements at the surface (serviceability of buildings) and exaggerates results of the geotechnical monitoring; an outlook on a new large-scale inner urban tunnel project and a feasible tunnelling technique will be given.
