Public works


DRAINTUBE - Drainage under railways


The installation of a drainage system under railways solves many problems that can be encountered.

On compressible soils, the DRAINTUBE® FTF geocomposite evacuates the water from soil consolidation. It is often used in addition to vertical drains.

In cuttingsDRAINTUBE® FTF helps to drawdown the water table and prevents groundwater from rising in the structure.

Placed between the infrastructure and the sub-ballastDRAINTUBE® FTF collects the water infiltrated under the railways or acces roads, and drains it towards the collection trenches or ditches on the sides.

Placed between the sub-ballast and the ballast, DRAINTUBE® FTF compensates for the loss of hydraulic conductivity of the ballast due to its densification and degradation over time, and increases the drainage capacity of the entire system


  • Efficient drainage and filtration of the infrastructure even under heavy loads
  • Use in cuttings and compressible areas in addition to vertical drains
  • Increase of the long-term drainage capacity of the ballast
  • Reduction of the construction time
  • Easy installation with a single product to unroll
  • Cost-effective and environmentally friendly solution as it replaces granular layers


Drainage Drainage
Filtration Filtration
Mechanical protection Mechanical protection


  • Multi-linear drainage geocomposite (ASTM D4439)
  • Perforated mini-pipes made of polypropylene
  • 3 diameters of perforated mini-pipes: 16 mm, 20 mm and 25 mm
  • 4 spacing options between the mini-pipes: 2 m, 1 m, 1/2 m and 1/4 m (80’’, 40’’, 20’’, 10’’)
  • Standard roll size: 3.98 m x 75 m (13.1’ x 246’)