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Caldecott Fourth Bore Tunnel: An Innovative NATM Design
The Caldecott Fourth Bore Project is a 1,030m long, 15.2m wide, US$420 million highway tunnel in the San Francisco Bay Area
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The Caldecott Fourth Bore Project is a 1,030m long, 15.2m wide, US$420 million highway tunnel in the San Francisco Bay Area
Excavation speeds in the Mt Ovit Tunnel increased 25% after a switch to BarChip Macro Synthetic Fibers
The Utah Department of Transportation officials approved the use of BarChip because of the superior performance and the additional benefits offered.
BarChip macro synthetic fiber reinforcement was able to stabilise the remote embankment.
BarChip structural synthetic fiber was chosen to meet the design life requirements, eliminate the risk of salt water corrosion and improve the structural integrity of the substrate.
Methven (2004) shows that fiber reinforced shotcrete (FRS) has significantly faster development times compared with mesh and bolt ground support systems.
Barchip’s synthetic fiber helps deliver substantial material handling and maintenance cost reductions to Helsinki Metro.
Newcrest is Australia’s largest gold producer and has embraced Barchip synthetic fiber reinforced shotcrete for ground support.
Barchip’s synthetic fiber reinforced shotcrete easily met the performance specifications of the Devil’s Slide road tunnel.