Drained and waterproofed tunnel constructions – TBM excavated

A TBM excavated tunnel through sound rock normally has a smooth and firm surface. In a drained tunnel system, System Platon Tunnel Membrane can be used as the single layer drainage and waterproofing membrane, instead of the traditional geotextile and flat membrane. The Tunnel Membrane may cover the entire tunnel circumference or upper sections only, and completed with Platon P20 in the lower section of the tunnel.