Defining the upper viscosity limit for mineral slurries used in drilled shaft construction : [summary].
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2014-02-01
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Abstract:Many structures built on Florida’s variable, sandy
soils require deep foundations, such as pilings.
Although pilings may be more familiar, drilled
shafts are also often used. Drilled shafts require
less expensive equipment and create less of the
vibration that can disturb nearby structures and
inhabitants. A drilled shaft foundation is created
by drilling a hole of the correct diameter and
depth. A steel reinforcing frame (cage) is placed
in the hole, and concrete is
added. The walls of the hole
must remain intact during all
phases of the installation.
One means of doing this uses
a clay-water mixture, called
slurry, to fill the hole and
stabilize the walls, especially
where groundwater threatens
wall integrity. After the cage
is placed, concrete is pumped
in, starting at the bottom;
this displaces the slurry,
which is captured for reuse.
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