D8 Motorway viaduct Kninice

Completed in 2006

Viaduct Knínice, which is situated near a small village Kninice, is formed by two parallel bridges of the length of 1,027 m and 1,077 m. Since the viaduct continues into the tunnel of Libouchec, the transverse gap between the bridges varies – from 0.90 to 9.00 m. The bridge decks are formed by spine girders with large overhangs. The girders, which have a variable depth from 1.40 m at midspan to 2.60 m at supports, were incrementally cast span-by-span in the formwork supported by an underslung movable scaffolding.

Structure length

1,027 m and 1,077 m


Motorway D8, near a tunnel of Libouchec

Span length

31.50 – 42.00 m

Structure type

Continuous spine girder structure.

Width of the superstructure

14,80 + 14,80 m

Scope of work

Design for construction permission, Tender design, Detailed design.


GPS: 50.7381047N, 14.0085905E
zobrazit na mapy.cz


Award of the Czech Ministery of Transport, 2007.