Every two years, the National Days of Geotechnics and Engineering Geology bring together the French geotechnics community to foster exchanges around site reconnaissance, geomaterial behavior, structure behavior and their numerical modeling. These themes were addressed this year in light of challenges raised by energy and ecological transitions.
The event was punctuated by numerous scientific presentations within thematic sessions, and by moments of exchange particularly at exhibitor organization stands. During these days, Isabelle Halfon, geotechnical engineer at BRGM, co-coordinator of the S-PASS project of PEPR Subsurface, and president of the "Climate change and geotechnics" thematic session, presented the Subsurface, Common Good program at the BRGM stand. An opportunity to take stock of the S-PASS project.
Focus on the S-PASS "Paris Basin - Urban subsurface resources and uses" project
Co-coordinated by Isabelle Halfon and Jocelyn Barbarand (Paris-Saclay University), the S-PASS project brings together 11 partners to improve knowledge of the Paris subsurface, which can become a new space to develop as an alternative to urban sprawl, and to evaluate use potentials. It focuses on the first 200 meters of Greater Paris subsurface and specifically aims to:
- better know geological formations and geomechanical properties of this subsurface;
- test new geophysical methods for terrain characterization in urban areas;
- design a 3D digital model of the Paris subsurface, associating geology, geotechnics and infrastructure, and share it with planning actors and citizens to build future uses of this underground space;
- study possibilities for using underground space;
- evaluate the geothermal potential of stations and tunnels in the Paris basin, and shallow geothermal energy at neighborhood scale;
- evaluate the valorization potential of excavated soils for creating fertile aggregates.
