Built between 1958 and 1961, ArcelorMittal’s wharves in Port-Cartier play a vital role in shipping iron ore concentrate and pellets to four continents. Following a major storm, inspections revealed advanced corrosion of the steel sheet piles and structural damage that required prompt action. Our engineering team supported the client in rehabilitating this strategic infrastructure in a complex marine environment exposed to significant climatic and operational stresses, while maintaining port operations and protecting the aquatic ecosystem.
Our teams specialized in marine, geotechnical and structural engineering, along with numerical modeling, project management, and port logistics. We carried out numerous dives, site investigations, and analyses to assess the condition of the structures. These studies led to an innovative solution: rehabilitating 3,281 feet (1,000 metres) of the wharf through the addition of a composite steel and concrete wall along the waterfront face. Steel sheet piles, 72 feet high (22 metres high), were anchored underwater into bedrock and stabilized with long horizontal tiebacks. This helped preserve the integrity of the structures while facilitating uninterrupted operations. Carefully controlled concrete placements then completed the work, reducing loads and risks throughout construction.
Supported by 3D modeling, structural analyses, and rigorous planning, this solution will extend the service life of the wharves by 50 years while reducing environmental impact and establishing the continuity of regional economic activity.
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