Mining engineering


DRAINTUBE FT - Sludge dewatering


To ensure sludge dewatering in coalfields, DRAINTUBE® FT provides a suitable solution to recover as much fresh water as possible from tailings and reduce the carbon footprint of mining waste deposits by reducing their water content.

The installation of DRAINTUBE® FT is a solution which meets air and water quality regulations with a view to limiting the impact of the mining activity on local populations, reducing the environmental footprint and optimising the recovery of tailings water. The mining industry has been asked to reduce the amount of fluid by collecting sludge and storing it in dedicated areas.

Connection to the collector via the Quick Connect system

The Quick Connect system connects the mini-pipes of the DRAINTUBE® FT directly to a main collector pipe. This allows for the replacement of the collector trenches when site conditions make their construction difficult. It also permits to better control the outflow.



  • Limited water infiltration in slopes and the bottom of coalfields
  • Slope stability
  • Reduction in water stagnation time
  • Reduced water evaporation
  • Ease of installation with a single product to unroll
  • High drainage capacity under heavy loads
  • Adapted Filtration Opening Size of the filter to prevent fast clogging
  • Optimized of the storage capability of the pond
  • Replacement of the collector trenches using the Quick Connect system
  • Cost-effective and environmentally friendly solution as it replaces granular layers


Drainage Drainage
Filtration Filtration
Mechanical protection Mechanical protection


  • Polypropylene geocomposite
  • Roll width : 3.90 m
  • Roll length : 50 m
  • 3 diameters of perforated mini-drains : 16 mm, 20 mm and 25 mm
  • 4 possible distances between mini-drains : 200 cm, 100 cm, 50 cm and 25 cm

Projects completed with DRAINTUBE FT

Drainage and protection under waterproofing layer

Drainage and protection under waterproofing layer

[Public works]

A22 motorway central reservation - Roncq - Tourcoing (59)
43 000 m2
The waterproof area of the A22 motorway’s central reservation is affected by gas leaks. The DRAINTUBE® FT drainage system was installed to drain gases and guarantee the integrity of the geomembrane.

Waterproofing of motorway ponds

Waterproofing of motorway ponds

[Hydraulic structures]

A63 stormwater ponds - Saint-Geours-de-Maremne (40)
67 000 m2
To ensure the sustainability and waterproofing of the A63 stormwater ponds, a DRAINTUBE® FT solution was implemented. It drains rising groundwater while guaranteeing the waterproofing of the ponds.