pile driving. Various carrier machines from LRH 100 to LRH 600,
but also the complete LRB series are available. Due to the special
leader kinematics, very large radii and continuous inclinations can
be achieved. Liebherr also has the right tools at the ready with various
sizes of hydraulic hammer.
After selecting the right equipment for the respective job site,
it is then time to get to work. First, the exact GPS position of each
individual pile is digitally transferred to the Liebherr machine.
With the aid of the LIPOS positioning system it is now possible to
approach every pile position with centimetre precision. Ground
markings are no longer required. On an additional monitor, the
operator can constantly see where he is positioned on the job site
and which piles have still to be inserted. The leader’s automatic
alignment system and storage of certain leader inclinations make
it possible for the operator to find the precise position of the
driven pile. The new joystick enables leader movement at all times
and simultaneously with all other machine movements. Once the
exact positioning has been completed, the pile can be installed
and recorded concurrently. All relevant data for each driven pile is
automatically recorded using the PDE, while the intelligent hammer
control facilitates operation for the driver. Impact energy,
impact height, impact frequency per minute, the total number
of impacts, the penetration of the pile per impact and the exact
impacting time are recorded for each pile. Using the PDE data, a
pile driving protocol can be created as proof of quality only seconds
after the last impact is made. The impact energy, impact
height and the weight of the hydraulic hammer are known. The
measurement of the pile’s penetration per impact makes it possible
to make a statement about the load-bearing capacity at all times
during the pile driving process.
At the end of the day, it is important to keep track of everything.
Data are continuously generated: about the Liebherr
machine, about the driven piles, about the progress of the job site,
about the positioning and about the weather. It is imperative that
these data are professionally prepared, analyzed and stored. With
the software MyJobsite, Liebherr puts a tool in its deep foundation
customers’ hands, which makes child’s play of the preparation
and analysis of all data relevant to the job site. The created
pile driving protocols can be retrieved at all times and, therefore,
prove the load-bearing capacity of each individual pile. Standardcompliant
reports about the whole job site can be created in no
time at all with MyJobsite.
Therefore, it is possible to read all information about a driven
pile when using a Liebherr machine for piling work. The loadbearing
capacity, the energy required to drive the pile into the
ground, whether the pile is damaged, the exact position and
inclination data, etc. Everything can be done digitally without any
manual recordings. t
QA/QC – LIEBHERR
120 | ISSUE 3 2021 www.piledrivers.org
/www.piledrivers.org
