Application:

• quasi‑watertight retaining walls for deep excavations, such as multi‑level underground car parks or deep road underpasses
• high resistance deep foundation elements (so-called barrettes)
• cut-off walls to limit groundwater flow under leveesor contaminated site containment

The principle of the technology is the excavation of a trench a mechanical or hydraulic grab. During excavation, the soil around the trench is supported by bentonite or polymer slurry. In case of reinforced concrete diaphragm walls, once the trench is fully excavated, the steel reinforcement cage is installed, followed by concreting of the trench. For self‑hardening slurry walls, the supporting slurry hardens due to the added binder, forming a low‑strength wall structure.