Client: Gammon Construction | Drainage Services Division
Location: Hong Kong
Contract Duration: 4 years
Safety Statistics: 1.21 LTIFR

Scope of Works

Vertical excavation works for the Harbour Area Treatment Scheme 2A (HATS 2A), including;

Blind sinking 4 shafts ranging from 8m to 12.5m diameter to a depth of 180 metres, establishing off shaft drives and Raise drilling of 7 pipe shafts from surface to underground
Designing and fabrication of shaft mucking system to WA Mining Regulations standards to suit both the initial shaft excavation and subsequent tunnel waste rock removal
Shaft sinking by hand held methods to a depth of 180m below surface
PEG (Pre Excavation Grouting) to 70 bar undertaken systematically during shaft and tunnel advance to prevent water inflows
Off shaft development to establish hoisting system and tunnel rail systems
Installation of shaft steel work, services and ventilation ducts
Housing all operations within a sound attenuating enclosure
Installing and commissioning automated hoisting system for tunnel rock extraction.