Structural rehabilitation by mortar spraying in Trois-Rivière
- Client : Trois-Rivières
- Réalisation : 31/01/2025
THE CONTEXT
A culvert measuring 1,800 mm in diameter and 10.8 meters in length to be rehabilitated
The City of Trois-Rivières needed to repair culvert No. 31, a corrugated galvanized steel pipe (CGSP) measuring 1,800 mm in diameter and 10.8 meters long, located under Rue des Chariots. This culvert, which was severely corroded at the water line, required structural rehabilitation to ensure road safety and the durability of the infrastructure.
The complexity of the project lay in the location of the structure itself: Rue des Chariots is the only road access to a residential neighborhood. Prolonged closure or complete excavation of the road was therefore impossible without compromising accessibility for residents and emergency services.
CHALLENGES
The main challenge of this project was carrying out the work during the winter months. The call for tenders, launched at the end of 2024, required the work to be completed by January 31, 2025, leaving no room for postponement or extension of the project.
The weather conditions, typical of the Quebec winter, therefore represented a significant logistical constraint, both for the mobilization of equipment and for the application and curing of the sprayed mortar.
THE SOLUTION
To meet this challenge, the City of Trois-Rivières chose the structural mortar spray rehabilitation solution offered by Soleno Service. This method, based on Centripipe technology, allows high-performance mortar (PL-8000) to be applied directly to the internal walls of the culvert without excavation. The engineer in charge of the project recommended a thickness of 25 mm in order to restore the structural strength of the structure and significantly extend its service life.
Before application, the undulations in the pipe were filled with precision to ensure a uniform profile. The Soleno Service team then proceeded with the controlled spraying of the mortar, respecting technical tolerances despite the winter conditions. Particular attention was paid to managing the internal temperature of the pipe to ensure optimal curing of the material.
