“Austrian Cut-off Walls” – an Efficient Technique to Secure Waste Deposits Economically

In this period much more than 2,000,000 m2 were installed. Due to increasing requirements, specially regarding the tightness, in most cases the “Vienna chamber-system”, consisting of two parallel driven walls with transversal sections has proved to be mostly adequate. Although being double installed, there are economic benefits in general comparing with a monoguided impermeable diaphragm wall. Additionally the “Vienna chamber-system” has the advantage of being redundant with reference to the water tables inside and outside of the sealing- wall system.