Diaphragm walls are in situ reinforced concrete underground walls commonly used as retention systems and permanent foundation walls. Diaphragm wall also serve as cut-off against lateral ingress of ground water and are an appropriate solution for shoring of deep excavations in soils and soft rocks with high ground water levels. Ammico has extensive experience in diaphragm wall works and has installed diaphragm walls up to 78m in depth. Ammico owns eight highly advanced diaphragm wall cutters and associated plant such as desanders, filter presses, delivery pumps, slurry storage tanks etc.

Slurry walls also can be constructed with Cement mixed with bentonite are also used as ground water barriers.