|Place of Origin:|
Shaanxi, China (Mainland)
|After-sales Service Provided:|
Engineers available to service machinery overseas
Packaging & Delivery
|Packaging Details:||no packing|
|Delivery Detail:||15 days|
Vibro Replacement (Stone Columns)
Vibro replacement is a ground improvement technique that constructs
dense aggregate columns (stone columns) by means of a
crane-suspended downhole vibrator, to reinforce all soils and
densify granular soils. Vibro replacement stone columns are
constructed with either the wet top feed process, or the dry bottom
In the wet top feed process, the vibrator penetrates to the design
depth by means of the vibrator’s weight and vibrations, as well as
water jets located in the vibrator’s tip. The stone (crushed stone
or recycled concrete) is then introduced at the ground surface to
the annular space around the vibrator created by the jetting water.
The stone falls through the annular space to the vibrator tip, and
fills the void created as the vibrator is lifted several feet. The
vibrator is lowered, densifying and displacing the underlying
stone. The vibro replacement process is repeated until a dense
stone column is constructed to the ground surface.
The dry bottom feed process is similar except that no water jets
are used and the stone is fed to the vibrator tip through a feed
pipe attached to the vibrator. Predrilling of dense strata at the
column location may be required for the vibrator to penetrate to
the design depth. Both methods of construction create a high
modulus stone column that reinforces the treatment zone and
densifies surrounding granular soils.
Vibro replacement stone columns have been used to increase bearing
capacity, and decrease settlement and mitigate liquefaction
potential for all types of planned structures including buildings,
embankments, dams, tanks and towers.
Vibro replacement rigs can be fully instrumented with an on-board
computer to monitor specific parameters. Monitoring these
parameters allows the operator to correct any deviations in
real-time during the construction process to keep the stone column
within project specifications. Data from the Data Acquisition (DAQ)
system such as amperage and lift rate are recorded and displayed in
real-time alongside specified target values on an in-cab monitor.