ABSTRACT
A study of publications on the subject of landfilling in recent years reveals conspicuous shortcomings in the area of leachate drainage systems. An attempt was subsequently made to transfer the experience gained in wastewater engineering to the construction of leachate collection systems. Leachate drainage measures are designed to conduct the free water in a landfill area quickly to a leachate collection system. Shafts and tunnels are used to collect leachate and to allow f or periodic maintenance of the drainage system. The necessary values for structural calculations are unknown for a landfill of different waste materials, and the shafts and tunnels should be safely accessible over a long time period. The most important criteria for the calculation and layout of the leachate collection systems. The test presented concerns friction between sand and a bituminous geomembrane, this type of geomembrane being used frequently as a protective cover against rain water at waste disposal sites.
