Caractérisation expérimentale de l'interaction sol-géotextile sous chargement dynamique de type impact

Abstract

International audienceAn original pull-out test apparatus has been developed to study the behaviour of soilgeosynthetic interface under dynamic load of impact type (rapid pull-out). The development of the device and the experimental procedure are first presented, then results of a feasibility campaign are analysed. In this campaign, only one type of soil and geotextile were used, under constant confinement, and several pull-out energies were applied. The repeatability of the test is first addressed, and appears to be very satisfactory. The tests performed under several pull-out energies showed similar trends. In particular, after a peak of pull-out force, a force plateau has been observed for all tests, taking place as the maximum pullout velocity is reached. A soil-geotextile interaction model cannot be extrapolated yet, but the first experimental results are very encouraging in going this way