OPERATION
SHEET/PILE DRIVING AND EXTRACTING
Conventional crane mounted pile drivers can be too large, powerful and costly for some
applications of sheeting and pile driving. The mobility of the excavator allows operation
of the boom mounted driver/excavator in congested city areas, under low bridges, in
narrow spaces around bridge piers, etc. The carrier boom provides positioning and the
hydraulic system supplies power to the attachment, resulting in a self-contained, very
mobile unit. The ability to apply downforce from the excavator boom enables the
driver/excavator to out drive larger, cable suspended pile drivers. The low noise level
permits driving and extracting in residential areas.
The same vibratory and impulse forces that are effective for soil compaction are also
very appropriate for driving of sheeting. In most granular materials, a vertical force
down on the sheet or piling is adequate. In more difficult cohesive materials, the
baseplate can be positioned on the sheet at an angle or slightly off-center. The offset
imparts an impacting or “slapping” motion increasing the driving force.
SHEET/PILE AND POST/PIPE ADAPTERS
The NPK Compactor/Driver can be easily modified for use as a sheet/pile driver and
extractor, or pipe/post driver. A simple guide or extracting clevis (EA) can be welded to
the baseplate (DZ). Special attachments are available from NPK.
If using the NPK Compactor attachment for Sheet/Pile or Post/Pipe driving, take caution
to add sufficient support for the lower frame.
Contact the NPK Service Department at (440) 232-7900 for details.
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