Evaluation of the impact on PILes response during Tunneling – E-PILOT

Within Grand Paris Express, the integration of tunnels dug in urban environments to create new public transport lines can lead to disorders on existing deep foundations. No recommendations are available to propose static and dynamic reliable numerical calculation.In the case of boring machine and its impact on deep foundations, their response depends on the transverse and lateral distance between pile tip and tunnel head. Moreover, being a three-dimensional process, boring representation in a transversal plane section requires phase construction in order to take into account boring machine advancement and action, making modeling complex. The research project aims at making calculation of deformation due to tunneling reliable. It would propose a procedure relying on some parameters (that can be obtained with reliable tests) and rheological models with already known validity limits. Project partners complementarity will allow to produce operational softwares to enforce this procedure.
Six Work Packages have been defined: a)WP1 for project management, b)WP2 for physical modelling and laboratory tests to supply data (parameters for soil/structure and for model structures), c)WP3 for static and dynamic in situ monitoring to get new data, d) WP4 for static numerical modelling where models could evolve with data in relation with research performed in WP2 and considering data from WP3. Indeed, e)WP5 for Numerical and analytical modelling of propagation of induced ground-borne vibrations with new models that would be validated using data from WP2 and WP3, f) WP6 for dissemination and valorization for all partners to propose recommendations for design and building companies.