Public works


ALVEODRAIN EV - Tunnel wall drainage


To dissipate hydrostatic pressures behind the concrete walls of underground structures (tunnels, covered trenches), a drainage and filtration system must be implemented between the rock or shotcrete wall and the cast-in-place concrete cover.

Installed in strips or over the entire surface, ALVEODRAIN® EV quickly drains infiltrated water. Its integrated filter geotextile prevents the migration of particles into the product. The drainage core of ALVEODRAIN® EV, composed of a dimpled polypropylene geotextile, increases contact between the shotcrete and the product. The structure of the geocomposite also allows it to adapt to irregular surfaces while keeping a high resistance to compression.

In addition to drainage, ALVEODRAIN® EV offers mechanical protection of the wall and avoid any damage when backfilling. It combines the three functions: filtration, drainage and mechanical protection in a single product and a single installation.


  • Effective drainage of infiltrated water
  • Filtration geotextile that prevents the migration of fines into the product
  • Soft, flexible, very robust material, adapting to irregular surfaces
  • Resistance to high loads
  • Easy to install, does not require specialized equipment or labor
  • Cost-effective and environmentally friendly solution as it replaces granular layers


Drainage Drainage
Filtration Filtration
Mechanical protection Mechanical protection


  • Polypropylene geocomposite
  • Roll width : 1.10 m
  • Roll length : 50 m
  • Roll weight : 34 kg

Projects completed with ALVEODRAIN EV

Tunnel wall drainage

Tunnel wall drainage

[Public works]

Côte-Vertu garage - Montreal
20 000 m2
As part of the construction of an underground maintenance garage as well as an access tunnel, ALVEODRAIN EV geocomposite was used to allow the drainage of infiltrated water from the vertical walls.