Landfill slip failure repair with geogrids using waste fill material at Danylan, Wales

Abstract

Danylan landfill operated from 1955 until its closure in 1971 just prior to introduction of legislation with an emphasis on environmental protection that would have required the landfill to have a license. In early 2004, and following a prolonged period of rain, an approximately 18 m high landslip occurred at the north-western end of the former landfill. The landfill involved approximately 4,000 m3 of uncontrolled refuse tip material in a matrix of made ground. Testing of the landslide debris indicated that, if left unattended, its chemical composition could pose a significant chronic risk to human health, flora, fauna and controlled waters. Restoration of the landslide to its original profile included the engineered placement of the failed waste debris back into the slip scar with the aid of Tensar polymer geogrid reinforcement providing a robust, cost effective, sustainable, environmental friendly and maintenance free engineering solution. © Springer-Verlag Berlin Heidelberg 2013.