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TEMPORARY SLOPE STABILIZATION AT THE AIRPORT TRAIL TUNNEL EXCAVATION, CITY OF CALGARY
Session: Landslides and Slope Stability V / Mouvements de terrain et stabilité des pentes V
Bronwen Kelley, Terracon Geotechnique Ltd (Canada)
Paul Xu, Terracon Geotechnique Ltd (Canada)
Ognian Gubev, Terracon Geotechnique Ltd (Canada)
Laura Normore, Terracon Geotechnique Ltd (Canada)
Tara Rihn, Terracon Geotechnique Ltd (Canada)
Lee Nichols, Terracon Geotechnique Ltd (Canada)
Kelly Illerbrun, PCL (Canada)
The City of Calgary identified Airport Trail as a key East-West Corridor providing connection from Deerfoot Trail to Stoney Trail. The Calgary International Airport expansion project resulted in a need to develop a tunnel to accommodate east-west traffic under the new runway and taxiways. This tunnel was constructed as a cut and cover tunnel requiring excavation up to 19 metres deep in the local tills and Tertiary soft rocks. This paper describes the rock slope issues and mitigating measures to allow safe construction to proceed.
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