Diaphragm Walls ~ these are structural concrete walls which can
be cast in-situ (usually by the bentonite slurry method) or
constructed using precast concrete components (see next page).
They are suitable for most subsoils and their installation generates
only a small amount of vibration and noise making them suitable
for works close to existing buildings. The high cost of these walls
makes them uneconomic unless they can be incorporated into the
finished structure. Diaphragm walls are suitable for basements,
underground car parks and similar structures.
Ground Water Control---Permanent Exclusion