Tunnel Blanka

Highway main tunnel of the Prague Motorway ring, connected by galleries. 2009 - 2012

Construction period:
2009-2012

Project type:
highway main tunnel of the Prague Motorway ring, connected by galleries

Location:
City of Prague, Czech Republic

Description:
The project consists of the Spelc-Tunnel (2x2.200m 2-lane and 3-lane tunnel) and the Mypra-Tunnel (2 x ca.540m 2-lane tunnel).
The main tunnel cross section – ca. 170 m²
The emergency tunnel cross section – ca.40 m²
The connected galleries cross section – ca. 15 m²

Technology:
NATM (New Austrian Tunneling Method) sequential method drill and blast as well as an excavator. Sidewall drifts as well as crown-bench-invert using safety measures like pipe roof umbrella in advance. Inner lining works for concrete invert.

Additional information:
The works are executed as Subcontractor of Metrostav s.a. , Prague.