Project category

Energy

Location

Hull, Quebec

Value($)

2 700 000

Realisation mode

Fixed price

Customer

Chaudière Water Power inc.

Year

2020-2021

Additional informations

Repair work on pillars # 45 and # 50 including the replacement of thresholds and guides for the addition of mechanical and automatic valves.

Main work carried out

• Construction of a cofferdam to isolate the last 6 openings of the Ring Dam
• Partial demolition of the concrete of the pillars and couriers
• Demolition of existing guides and thresholds
• Complete demolition of an old mobile joist installation winch
• Injection and repair of concrete on some of the pillars
• Complete installation of new recessed parts
• Repair of the concrete upstream of the pillars with the addition of galvanized round shields
• Sealing the rock floor
• Construction of a permanent access downstream of the dam

Special methods and technical features

• Precision demolition using a rock wheel concrete milling machine
• Work in sequence with a cofferdam not completely waterproof on the rock
• Repair of pillars with self-compacting concrete
• Replacement of guides without second phase concreting