Ageing of filter geotextiles in drainage works – monitoring of the Roissard experimental draining trenches

Abstract

The risks related to geofilters ageing used in drainage are a major issue in the context of landslide stabilization engineering as well as dam and dike design. The "DrainAgeing" project aims to better understand and prevent the ageing and clogging of drains. This paper presents the progress of the project and the results of 17 some years of monitoring of the Roissard experimental draining trenches. We conclude on the perspectives for the implementation of a second phase of the project consisting in the excavation and the analysis of samples of geotextiles and geomaterials.