Vertical panels are excavated under stabilising slurries using mechanical/hydraulic clamshell grabs or hydromill cutters to form a continuous cut-off, retaining and/or structural wall. Keller have a fleet of specialist wall excavation and construction equipment to complete all types of diaphragm wall and load bearing elements (LBE barrettes).
- Support of open or top down excavations
- Create barriers to groundwater flow
- Provide Load Bearing Elements (LBE Barrettes)
walls are constructed using grabs or cutters to create a narrow trench
excavation into the ground. The trench is supported by an engineered slurry.
Generally diaphragm walls are made from reinforced concrete, though
unreinforced walls can also be used. Joints in adjacent panels are formed using
either an over-cut (secant) technique or via temporary stop-ends. Keller offer
diaphragm walls in a range of thicknesses from 450-1500mm which can be
excavated to depths of 100m. Diaphragm walls are ideally used in congested
areas or where the excavation depth is very deep which would otherwise require
excavation of much greater soil volumes to provide stable battered slopes. The
choice of a diaphragm wall would suit deep basements, underground rail
stations, rail car unloaders, tunnel approaches, pumping stations and the like.
Diaphragm walls can be installed close to existing structures and in restricted
headroom. Diaphragm walls can also be used in combination with top down
Commercial and Residential
Diaphragm Wall and Barrettes
Gold Coast, Australia
Iluka ‘Spirit’ Redevelopment