In the scope of your infrastructure maintenance and surveillance, the renovation of metal culvert is a real technical and economic challenge. How can these structures be restored at a low cost and as quickly as possible, while respecting technical requirements such as the conservation of speed? The problem becomes even more urgent because a corroded duct can cause major disruptions for the stability of works over time.
Traditional techniques: solutions by default
Until now, three technical principles were possible: traditional sprayed concrete, poured concrete and lining with GRP (Glass-Reinforced Plastics). These three methods have advantages as well as many disadvantages including:
- Long and heavy preparation work: placement of framework and metal connectors (traditional sprayed concrete) / installation of a casing (poured concrete) or channeling by a special convoy of prefabricated modules (GRP pushing) for large diameters.
- Damage of works' characteristics: reduction of diameters (15 to 30 cm for concrete), creation of thresholds to be arranged to provide for passage of machines and wildlife.
Now there is another solution: Ductal®!