membraanwand

Membraanwand is a Dutch term that translates to "membrane wall" or "diaphragm wall" in English. It refers to a type of underground concrete wall constructed in situ, primarily used for deep excavation support and containment. This construction method is often employed in urban environments where space is limited and the stability of surrounding structures is critical.

The process typically involves excavating a trench to a predetermined depth, guided by bentonite slurry or polymer fluid to prevent the trench walls from collapsing. Reinforcement cages, often steel, are then lowered into the trench. Finally, concrete is poured into the trench, displacing the slurry and forming a continuous, monolithic wall. The slurry is then removed and recycled.

Membraanwanden are known for their high structural integrity, impermeability, and ability to withstand significant earth pressures. They are commonly used as retaining walls for basements, underground parking facilities, and tunnels, as well as for cut-off walls to prevent groundwater ingress or contamination. The construction method can be adapted to various soil conditions and depths, making it a versatile solution in geotechnical engineering. Its continuous nature ensures effective sealing, a key advantage in preventing water leakage and stabilizing excavations.