Groundwater in the Perthus Tunnel: feedback after excavation

  • Antonio Dematteis | antdematteis65@gmail.com Lombardi Engineering Limited, Glebe, NSW, Australia.
  • Riccardo Torri EG Team, Torino, Italy.
  • Bertrand Chereau Eiffage Construction, France.
  • Michel Ducrot Eiffage Construction, France.

Abstract

This work presents the experiences gained during the construction of the Perthus high-speed railway tunnel (8.4 km long), as regards water inflow management, analysis of the impact on surface-waters and groundwater, monitoring of piezometers and water quality control, soil injections. The excavation met granodiorites, schists, diorites, gneisses, black schists and coarse river deposits (pebbles and blocks) near the north portal. Some important tectonic structures, and associated groundwater flow, were also crossed. Finally, a geothermal study on the hydrothermal springs Le Boulou, which were not impacted, is presented.

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Published
2021-06-24
Info
Issue
Section
AQUA MUNDI (republished)
Keywords:
groundwater, tunnel excavation, monitoring, thermal springs, drawdown hazard
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How to Cite
Dematteis, A., Torri, R., Chereau, B., & Ducrot, M. (2021). Groundwater in the Perthus Tunnel: feedback after excavation. Acque Sotterranee - Italian Journal of Groundwater, 10(2), 65-71. https://doi.org/10.7343/as-2021-518