Diaphragm Walls are used to construct retaining walls in areas where space is often limited, such as underground stations and car parks, basements, road junctions and underpasses. They can be installed in most ground conditions, and are designed to reach very great depth. Diaphragm Walls are typically constructed in reinforced concrete and provide the required structural capacity to facilitate certain construction activities such as: Retaining Wall, Cut-off provision to support deep excavation, final wall for basement or other underground structure, separating structure between major underground facilities or as a form of foundation.
Diaphragm Walls can also be constructed as slurry walls, where the excavation is protected against collapse by continuously using cement-bentonite. The final stabilisation of the construction pit is made with sheet piles or prefab elements which are lowered down into the cement-bentonite.