TULIP

The TULIP project (2019-2022) is a project led by the Société du Grand Paris, with the participation of Université Gustave Eiffel (SRO laboratory of the GERS department and IMSE laboratory), ENTPE, and the Tunnel Studies Center.

It enabled the realization of a full-scale original experiment to assess the influence of a tunnel boring machine passing under deep foundations. The experiment took place in 2020, on the route of the future line 16 of the Grand Paris Express, in Aulnay-sous-Bois.

The PhD thesis of Wassim Mohamad, defended in October 2022, presents, on the one hand, a detailed analysis of part of the measurements carried out within the TULIP project, and on the other hand, an original finite element numerical modeling approach of tunnel boring, which is simpler to implement and calibrate than classical approaches. The calculations were performed with the CESAR solver, using the CESAR Pilot. (link: cesar.univ-gustave-eiffel.fr)

The project led to an exercise in predicting the response of an instrumented pile, and the results were presented at a Scientific and Technical Half-Day of the CFMS.