Efficiency of different geotextiles for the protection of the geomembrane at landfill sites

Abstract

Protecting geotextiles are used in the design of watertight bottom liner of landfill sites, above the geomembrane to protect it against puncture during the installation of the drainage layer and, during the service life, to the weight of the waste to be put in place. To help in the design of the geotextile, a field test of 18 m x 30 m was undertaken. A geomembrane was put in place and several samples of geotextiles installed above it before the 50 cm thick gravel layer. A truck and a loader have run on the field tests to simulate the circulation of earthmovers. Observations of the geomembrane were undertaken in correlation with the type of geotextile installed on the area of concern. Geomembrane samples were taken for lab tests. Static damage tests were also undertaken to simulate the waste loading conditions.