METHOD OF SEALING EARTH STRUCTURES, IN PARTICULAR FOR CREATING CONTROLLED WASTE DUMPS WITHOUT DRAINAGE

摘要

The present invention concerns a method of sealing earth structures, in particular for isolating waste or for creating controlled waste dumps without drainage. The method involves the creation of three separate mineral sealing layers: the base sealing layers (2, 3) and the surface sealing layer (5) have extremely low permeability coefficients, while the middle layer (4) which contains the waste or refuse has a high sorption capacity as well as a low permeability coefficient. The high sorption capacity of the middle layer, together with a honeycomb arrangement of base and intermediate sealing layers, make a drainage system unnecessary in the case of a waste dump. By using particular waste or excavated material as sealing material for the individual layers (e.g. marl, slag, ash and sludge from wet gravel and sand separation) in this process, it is possible to seal off or isolate waste in an economical and environmentally sound manner.