GeoAsia - 8th Asian Regional Conference on Geosynthetics, 2025, Brisbane
The management of risk from ground gasses such as vapour phase contaminants, landfill gas or biogas is a crucial part of site management for developments on or adjacent to the sources of such gasses to mitigate the risk to human health and the environment. The risk of ground gas must be evaluated initially to inform the level of risk, potential impact and to inform the appropriate mitigation solutions. Traditionally, systems deployed to manage the risk of ground gas relied on gas collection systems comprising drainage aggregate, a network of vertical or horizontal gas collection wells connected to pipework that reticulate the gas to a treatment or utilization facility. This paper presents two alternative approaches utilizing geosynthetic materials for the collection of ground gas considering other engineering issues at the site, cost, ease of constructability, whilst migrating environmental and human health risk.
