Slurry and Cut-Off Walls

Slurry and cut-off walls are used when a structure needs to be cut off from surrounding ground water or ground water needs to be collected in a defined area (e.g. waste dumps). Single panels or a continuous trench will be excavated and simultaneously backfilled with a stabilizing fluid. Single phase walls use fluid mixtures made of bentonite, cement and/or various chemicals. Double phase walls first stabilize the excavation and backfill it later with a concrete, bentonite, sheet pile or even sealing membrane combination. With this method, large areas can be sealed off in a relatively short period of time. The walls can extend to more than 50 m in depth and can also be constructed as double walls connected by transverse bulkheads at certain intervals for better protection and monitoring (so-called cut-off chambers).

Europe