Infrastructure,
Urban transport infrastructure,
Rail transport infrastructure,
Structural engineering,
Concrete construction,
Civil engineering
Stadtbahn line U81, lot 2, shell construction of tunnel
construction Diaphragm walls: 22,000 m² Road demolition/new construction: 10,000/15,000 m² Excavation: 100,000 m³ Since the U81 construction site is directly next to Düsseldorf Airport, another requirement is that construction work does not affect air traffic or the operation of the airport.[...]