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  Adapting Rock Tunnel Design to Life Cycle Assessment Challenges, Driving Forces

  This paper describes the challenges, driving forces and possible solutions associated with adapting tunnel design to the Life Cycle Assessment (LCA) methodology according to the latest standards for assessing the sustainability of engineering works (EN 15643-5 and EN 17472) in order to create a working framework for the LCA of hard rock tunnels. A review of current design practice and published LCA studies of rock tunnels reveals that these European standards are neither being fully used by researchers nor by market actors to create climate-neutral rock tunnels. It is suggested that, to reduce the total climate impact, the overall project management should be divided into separate measures for a rock tunnel’s sub-structural parts, integrating environmental optimization into the geo-technical optimization process.

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