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| Canadian Projects Ltd. |
Revelstoke, BC |
Site engineer for the Pingston Hydroelectric project near Revelstoke from June 2001 to Aug 2002. The two water conveyance tunnels are 3.0 m wide and about 5 kM long driven in metamorphic rock, and both tunnels connected by a raisebore tunnel. The elevation head from Pingston Creek to the Powerhouse located beside Arrows Lake is about 450 m. Responsibilities involved geologic mapping, determination of tunnel support, quality assurance and monitoring of Contractor progress.
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| Ministry of Transportation and Highways |
Lillooet, BC |
Conducted site investigation and provided detailed/functional design report for the new, two-lane, 435 m-long tunnel in closely jointed argillite rock and viaduct to upgrade Highway 12 in the Texas Creek area, south of Lillooet, BC. The site investigation involved diamond drilling, installing instrumentation, logging rock core, and geological mapping. The recommended procedure for tunnel advancement would be to excavate the top heading and install pattern rock bolts, mesh and shotcrete support while the remaining bench would be removed using vertical blast holes or mechanical excavation. The tunnel design included a reinforced concrete liner system with waterproof membrane and drainage provisions in the tunnel invert to carry seepage water out to the tunnel. The construction of the tunnel required designs for the approach cuts in weakly cemented gravelly sandy colluvium, rock fall sheds and support for the portal rock cuts.
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| Rapid Transit Project 2000 |
Vancouver, BC |
Performed field investigation for the new Skytrain expansion, which involved diamond drilling for the proposed 300 m-long tunnel in weak sedimentary rock and dense till. The drilled core were logged to determine rock conditions and to estimate tunnel support requirements. This proposed tunnel was part of a 14.5 km guideway along the Broadway-Lougheed Corridor (Phase 1 expansion) in Greater Vancouver.
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| CH2M Hill Inc. |
Whittier, Alaska |
Prepared design report for the proposed two-lane, 165 m-long tunnel in mainly strong, massive, fresh argillite rock with faults intersecting the tunnel at oblique angles. The tunnel design component was part of the rock cut slope works for a new 900 m-long highway between Portage Creek and Placer Creek. The tunnel was constructed using drill and blast methods in a three stage sequence, the central heading being excavated and supported first, followed by the two side headings. The design of the bolting pattern was carried out using the computer program UNWEDGE to study the stability of typical wedges formed in the tunnel roof by discontinuity sets, and to determine the required support (pattern bolts, mesh and shotcrete). The construction of the tunnel also required designs for support of the portal cuts and a lining system for drainage and ice control.
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