Cavidrain® Liner has been specifically designed to be highly flexible to accommodate the contours of the excavated tunnels walls.
Cavidrain® Liner is a combined drainage and waterproofing liner that is welded to form an integral waterproof system. The sheets are easily fixed to the smoothed excavated walls with a sealed fixing detail and the system is finished with shotcrete.
- New tunnel construction
- Repair of existing tunnels
- Highway tunnels
- Railway tunnels
- NATM constructed tunnels
- Drill and blast tunnels
- Metro underground stations
- Cable tunnels
- TBM tunnels
- Simplified tunnel lining system.
- Materials & labour cost reduction.
- Reduced installation requirements.
- Improved drainage capacity.
- Reduced calcification risks.
- Minimised damage caused by mineral calcification.
Traditional methods of groundwater exclusion are difficult to install with any degree of reliability in modern tunnel constructions. Cavidrain® Liner provides a drainage layer that collects infiltration water from the excavated tunnel face while also acting as the waterproofing function.
In typical installations, Cavidrain® Liner is fixed to the smoothed, excavated face of the tunnel with rondels and covered with shotcrete. Shotcrete can be sprayed directly to Cavidrain® Liner to create the surface finish, offering 20% less rebound loss than a smooth PVC liner.
Cavidrain® Liner being LLDPE is highly flexible and acts to minimise the build-up of hydrostatic pressure, thus protecting and enhancing the integrity of the tunnel.
Typical Client Profile:
- Tunnel Engineers
- Tunnel Contractors
- Railway Engineers
- Consulting Engineers
- Utility Service Providers
- Waterproofing Contractors
Case Studies / Recent Projects:
Cavidrain tunnel drainage geocomposites for tunnel have been used in the following tunnel drainage projects:
The following similar products provide solutions for drainage and may be relevant:
Associated System Products
Within a tunnel construction, our technical team are at hand to discuss your unique requirements. The following product solutions may be a viable alternative:
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