Injection Works Old Kaiser-Wilhelm Tunnel

General data on the structural maintenance project - Injection works Alter Kaiser Wilhelm Tunnel

Client

Subterra a.s.

Contractor

BeMo Tunnelling GmbH, Niederlassung West

Project location

Old Kaiser Wilhelm Tunnel
56812 Cochem
Germany

Start of construction

2014

End of construction

2015

Project total value

6 million €

Geology

Historic stone and clay blockwork tunnel

Technical Data

Stabilisation grouting of historic structure:

• Main-Tunnel Length: 4,150 m
• High-performance grouting system by “Obermann”: 8 x DP63
• Grout pumped more than 3,000 m to injection location
• Carrying out stabilization grouting to allow safe removal of original inner blockwork lining (25-30 cm)
• Installed cement-grout (in total): 6,200 m³

Further project related information

• Permanent and temporary works design by BeMo Design Department
• Expected hydro-baric pressure > 3 bar at invert level
• Overburden between 8 to 30 m