Use of geosynthetics as a substitute for leachate drainage layers in landfill cells

Abstract

Given the good performance of geosynthetic material for drainage, it seems interesting to use these products to replace part or all of the drainage layer commonly used in landfill cells (silicate materials). The calculation showed that the replacement of a granular layer of 0.50 m by a drainage geosynthetic product is not always as easy as it seems : the maximum water head legally acceptable decreases with the thickness of the studied equivalent solution, which limits its ability to flow. ARCADIS and SITA DECTRA present here a case study on the Romagne-sous-Montfaucon landfill site for which a hybrid (solid granular + geosynthetic) was called.