Precast Concrete Diaphragm Walls ~ these walls have the some
applications as their in-situ counterparts and have the advantages
of factory produced components but lack the design flexibility of
cast in-situ walls. The panel or post and panel units are installed in
a trench filled with a special mixture of bentonite and cement with
a retarder to control the setting time. This mixture ensures that
the joints between the wall components are effectively sealed. To
provide stability the panels or posts are tied to the retained earth
with ground anchors.Ground Water Control---Permanent Exclusion