STATUS: COMPLETE
HARBOUR AREA TREATMENT SCHEME 2A
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;
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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
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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
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Shaft sinking by hand held methods to a depth of 180m below surface
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PEG (Pre Excavation Grouting) to 70 bar undertaken systematically during shaft and tunnel advance to prevent water inflows
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Off shaft development to establish hoisting system and tunnel rail systems
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Installation of shaft steel work, services and ventilation ducts
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Housing all operations within a sound attenuating enclosure
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Installing and commissioning automated hoisting system for tunnel rock extraction.
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