May/June 2022 - 62

DFI Europe Member: Junttan
Last October, DFI Europe member Junttan launched and
commissioned the first eJunttan PMx2e for Aarsleff Ground
Engineering in Sweden. The eJunttan PMx2e is the world's
first fully battery-powered pile driving rig.
The intent of the PMx2e was to
mimi c t he robus t de s i gn and
performance of Junttan's dieselpowered
PMx22 pile driver, while also
delivering a cleaner and greener piling
solution. Powered by two detachable
396 kWh battery packs to allow for 12
hours of continuous pile driving, the rig
is quieter, consumes less energy and
produces no C0 emissions.
2
Like any new technology, the early
stages of adoption will be scrutinized.
The reception has been only positive
for the PMx2e in its first six months.
Aarsleff put the rig to its first test,
driving 176 joined piles down to 40 m
(131 ft) on a life science project in
Mölndal, Sweden. It was a success, but
more importantly, its estimate of 6.5-7
hours of working time on a single
battery was realized with a medium
workload.
thoroughly during the six month period. Average energy
consumption is measured to between 40-50 kWh and the
customer has been able to operate 6.5-7 hours with a single
charge and one battery pack, and even up to 12 hours with
CCS-based quick charging during the breaks or by swapping
the battery packs. In addition, the
performance in relation to pile meters
and efficiency has been at the same
level as with the traditional dieselpowered
PMx22 - even when the rig
has been recharged during the breaks.
Junttan is encouraged by the positive
feedback and has doubled down on its
commitment to manufacturing electric
piling rigs. Not only are the next batch of
PMx2es already on the assembly line,
but the selection will also be widened to
include the PMx24 and PMx25 pile
driving rigs. Junttan is also investing
heavily in an entirely new generation of
electric rigs. There will be many more
positive surprises in the future, but one
thing is clear: " Respecting Ground " will
include an ongoing commitment to
sustainable piling.
eJunttan PMx2e
The next project was a preschool and apartment building
complex in Karlstad. The PMx2e worked from 7 a.m. to 7 p.m.,
thanks to Combined Charging System (CCS)-based quick
charging during lunch and breaks. With the second battery
unit the contractor has been able to work at recent work sites
around the clock only by swapping the battery packs.
Even hard-to-impress operators have good things to say
about the PMx2e. An 11-year veteran operator from Aarsleff
Ground Engineering with experience using the dieselpowered
PMx22 and PM23 reported that operating the
electric rig was nearly identical, albeit quieter, to dieselpowered
machines. After driving piles of
varying dimensions, the only difference
he cited was that the PMx2e achieves full
power almost immediately, whereas the
diesel requires some time to ramp up.
Output, energy consumption and
usability of the rig have been monitored
62 * DEEP FOUNDATIONS * MAY/JUNE 2022
https://www.eijkelkamp-usa.com/

May/June 2022

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