Hydraulic structures




The use of a drainage geosynthetic when building dikes extends the service life of the structures and significantly reduces the risk of failure. The SOMTUBE® FTF + DRAINATEX® solution is recommended when building traditional, water retention dikes (controlled flooding fields). It helps retain the water located on one side of the dike while protecting adjacent land against floods.

DRAINATEX® is installed vertically inside the dike to drain run-off water towards the body of the dike and avoid destabilising it.

SOMTUBE® FTF is placed at the bottom of the dike to collect run-off water underneath the dike in a collector drain, thereby limiting underpressure in the downstream section.

In addition to being cost-effective and easy to install, it has a better impact on the environment as it replaces granular layers and reduces or eliminates the need to transport these resources. 


  • Reduced risk of dike failure
  • Water retention and flood protection
  • High drainage capacity under heavy loads
  • Saving materials
  • 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


Drainatex :                                                        

  • Polypropylene geocomposite
  • Roll width : 4 metres                             
  • Roll length : 75 metres                       

Somtube FTF :

  • Polypropylene geocomposite
  • Roll width : 3.90 metres
  • Roll length : 50 metres
  • 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 DRAINATEX + SOMTUBE FTF

Drainage under and within the body of the dike

Drainage under and within the body of the dike

[Hydraulic structures]

Development of controlled flooding field structures - Renty (62)
7 800 m2 (under dike)
As a result of frequent floods, flood storage areas were developed to receive flood waters. SOMTUBE® FTF and DRAINATEX® were used to guarantee the sustainability of the dikes as well as water drainage.