Trenchless works
Lay or rehabilitate a network without open excavation, particularly in dense urban areas.
Laying and rehabilitating without open excavation
Ideal in dense urban areas, under roads, motorways and railways: GRP suits microtunnelling and sliplining, and GRP shells make it possible to rehabilitate accessible structures without open excavation.
- GRP shells: rehabilitation without open excavation, nuisance minimised
- GRP: controlled stiffness and abrasion resistance for microtunnelling and relining
- Sliding shells: installation with the sewer in service, no over-pumping
The right solutions
The ranges we most often propose for this application.
What our support changes
Choice of technique
Microtunnelling, relining or shells: we select the technique suited to the structure and its constraints.
Force calculation
Thrusts, friction and loads: we check the pipe’s strength during installation.
Site follow-up
Advice on shafts, joints and checks.
Frequently asked questions
Which pipes for microtunnelling?
GRP is suited to microtunnelling and relining thanks to its controlled stiffness and abrasion resistance. The choice depends on diameter, length and ground.
Can an existing collector be rehabilitated without replacing it?
Yes, with GRP shells for accessible collectors (circular, egg-shaped, rectangular…) or by relining in GRP.
Need personalised support?
Tell us about your project: we help you choose the right solution, size it and prepare the installation. Marc Sadok replies promptly.