Results of a benchmark exercise of prediction of tunnel-pile interaction: the TULIP project
Results of a benchmark exercise of prediction of tunnel-pile interaction: the TULIP project
The TULIP project, initiated by Société du Grand Paris with Université Gustave Eiffel, CETU (French Centre for Tunnel Studies) and ENTPE, consisted in a full scale experiment aiming at quantifying the impact of the passage of the TBM on three piles on a site located in Aulnay-sous-Bois (France). The piles were built especially for the project a few months before the TBM passage. They were equipped with topographic targets, vibrating wire gauges and optical fibers. The ground was instrumented with targets, inclinometers, extensometers, pore pressure cells. The evolutions of the displacements in the ground and of the piles heads, and the efforts in the piles were monitored during the TBM progression. A benchmark exercise was proposed to the French engineering companies; the aim was to provide class A predictions of: the settlement of the ground surface far from the piles, the settlement of the head of one of the piles, the variations of the axial load in the selected pile. This communication provides a short presentation of the numerical approaches adopted by the participants and draws some conclusions regarding the current practice of numerical modelling of TBM excavation process and of tunnel/ground/pile interactions.
Emmanuel Bourgeois; N. Berthoz; W. Mohamad; Fabien Szymkiewicz; Alain Le Kouby; Denis Branque; A. Michalski; C. Kreziak; L. Soyez
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
10. Tunnelling and mining applications
https://doi.org/10.53243/NUMGE2023-82
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