Etude du comportement dynamique d'un massif en sol renforcé par géotextile alvéolaire M3S®

摘要

Since 2007, Sol Solution company with the help of the Clermont-Ferrand Blaise Pascal University's LaMI laboratory, performed a study on the mechanical behaviour under dynamic load of a structure reinforced by the M3S (c) geocell system. In the context of that PhD, impact solicitations have been studied. This memory is divided in three parts : First part focuses on the main mechanical behaviour characteristics and general rules of reinforced soil with M3S(c) geocells design. Then, the bibliographical approach focuses on the 3 dynamic loads chosen (seism, blast, impact) and on the way they are taking in account on work design ; Second part shows the preliminary numerical approach which lead to the development of two numerical impact model on soil reinforced geocell structure. Results allows us to identify the most influent mechanical parameters of the different materials ; Last part groups numerical and similitude laws that allow to design a 1/10th low-scale impact experiment on two structures. Two different reinforcement were tested, plastic and paper. Experimental results allowed to improve two preliminary numerical models. Finally, discussion about that numerical tool and engineering applications are performed.