For partial waterproofing the most common tunnel application is the Umbrella System/Drainage System. This system is specifically designed for tunnels with dripping water conditions.
Examples of Application:
Road Tunnels
Railway Tunnels
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System description:
Protan Disc
In-Situ concrete
Protan InfraPlan Tunnel Membrane
Protan Geo (Geotextile)
Shotcrete
Protan Drain (Drainage Profile)
Protan recommends to use InfraPlan P20, P22 or P22+ for drainage applications.