ASSET’s Tunnel Liner Plate is a sectional corrugated steel system specifically designed for soft ground tunnelling and culvert reline applications. All elements can be carried to site by hand, and assembly is completed using high-strength nuts and bolts. All assembly is undertaken from inside the completed portion of the tunnel lining, which means an exceptionally safe workplace. Tunnel Liner is available in black or galvanised steel. Tunnel Liner Plate is available in a wide variety of shapes and sizes, from as small as 1.3 m diameter to a maximum 8 m diameter.

Tunnelling vs Cut and Cover: Tunnelling is most often used when the surface above the works cannot be open cut. This may be due to the following:
• traffic above
• existing buildings or structures
• space or clearance restrictions

Typical tunnelling applications would include the installation of drainage or utilities in:
• urban environments
• under highways
• under railways

Applications:
• Soft ground tunnelling
• Relining existing structures
• Vertical shaft liners
• Caissons
• Rockfall protection (mining applications)
• pipe relines, where access is available only from inside the liner
• pipe relines with vertical or horizontal changes in alignment (sharp turns)