Abstract
Abstract Field instrumentation was installed to monitor ground and lining behaviour during and after construction of the Mount Shaughnessy Tunnel (Rogers Pass Short Tunnel). The instrumentation was placed in a soft ground section of the tunnel as it passed under the Trans-Canada Highway. The tunnel was excavated through a dense bouldery soil. The loss of ground due to the tunnel excavation was found to be exceptionally small. This was attributed to the unusually high strength and stiffness of the host soil. Evaluation using the Boundary Element Method, together with a simplified analytical technique, was applied to assess the relevant soil parameters and their influence on the tunnel performance.
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