Cut & Cover waterproofing

The waterproofing of tunnels is a one of the most crucial points in terms of functionnality and durability of the project: it reduces corrosion and maintenance, and extends the life of the structure, at the same time improving its safety.

Underestimating the waterproofing might result very cosltly and complicated as the repair possibilities are very limited. 

Siplast offers bituminous top quality geomembranes that respond to the objective of integrating roads or railways more fully into their environment.

Waterproofing of cut-and-cover tunnel projects: traffic, rail or subway tunnels and pedesterian underpasses.

Performance requirements

The type of waterproofing used on cut-and-cover tunnel installations and its application depends on:

  • soil type,
  • level of the water table,
  • site access and the type of soil retention system.
Cut and Cover solutions
The solution is the use of prefabricated membranes that combine the advantages of traditional materials like bituminous binders with the advantages of polymers and geotextiles.
Siplast elastomeric bitumen Teranap TP geomembranes provide:
- Excellent resistance to ageing of the Teranap TP geomembrane due to the elastomeric bitumen compound enabling the material to retain its elasticity for extensive periods;
- High level of mechanical performances, especially resistance to puncture due to the double protection by polyester film surfacing and a thick polyester fabric reinforcement;
- Easier application by torching for anchoring and joining works to concrete structures;
- Compartmentalization.
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