The True Value of Engineering Geologists and Geological Engineers within the Canadian Tunnelling Industry: A review of structural geology and observed discontinuities in Georgian Bay Formation Shale and the associated impact on tunnelling
Author(s) C. Thurston, L. C. Kijak
Presented at GeoMontréal 2024 77th Annual Canadian Geotechnical Conference and 16th Joint CGS/IAH-CNC Groundwater Conference September 15 - 18, 2024 Hotel Bonaventure in Montréal, QC, Canada
Abstract
The aim of this paper is to provide a holistic ground model for the GTA Georgian Bay Formation Shale (GBFS) based on three local projects. The development of a conceptual geological and hydrogeological ground model allows for improved definition of the projects ground risks. This subsequently improves geotechnical baselines and characterisation of the ground conditions. This paper shall discuss how early identification of ground risks, through ground model development, allows for mitigation measures to be implemented in both tunnel design and construction. This understanding is vital for a successful tunnelling process that satisfies the clients budget and schedule allowance.