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Creation of a 600-place underground carpark facility next to Roelers station, nearly 18,000 m² underground. The roof of the structure is intended for a bus terminal and the access roads. The main works comprise:
- Diaphragm walls: 9,000 m²
- Jet-grouting columns: 156 units
- Rubble excavated in situ: 48,000 m³
- Concrete poured in situ: 22,200 m³
- Concrete reinforcement: 2,000 tonnes