Tunnel Tegel Airport
The tunnel Tegel Airport Berlin, shorter tunnel Tegel Airport (TFT), was taken in 1979 in the course of the construction of the A 111 in operation. The length of the tunnel tube east (north direction) is 967 m, the tunnel tube west (south direction) extends over a length of 878 m. The two separate tunnels were built in an open construction in a pit with groundwater lowering and then covered, so that the runway of the airport is located above. The outer wall thicknesses are 80 cm, the middle wall was designed with a thickness of 60 cm. The base plate has a control plate thickness of 1.20 m. The thickness of the ceiling slab is on average one meter. The inside width within the two tunnel tubes is approx. 10.50 m, the clear height was designed with 5.50 m and with extensions at a minimum of 4.81 m. Due to tightened safety guidelines for road tunnels (including 2004/54 / EC of 29 April 2004) and the tunnel leakages investigated in the 1990s, a basic overhaul was planned beginning 18 November 2006 for 18 months a full closure was carried out. Due to the structural condition is expected from the year 2021 a thorough renovation of the Berlin section of the A 111 required. In addition to the renewal of the carriageway, this also includes the refurbishment of the Tunnel Beyschlagsiedlung, Tegel Forest Office and Tegel town center as well as the replacement of the discontinued bridges in this section of the route. DEGES was commissioned to plan and carry out the construction work.Exit list
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