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drilling 1,742 metres total into the ground. Approximately
1,200 cubic metres of cement are being poured. The piles
vary between 10 and 14 metres in depth and have a diameter
of 900 millimetres. Due to the restricted working height, two
metre casing pipes have to be used and the reinforcement
cages have to be inserted in sections. The machine achieves
approximately two piles per day.
The absence of a combustion engine has two particular
advantages: the LB 16 unplugged produces no local exhaust
emissions and also generates considerably less noise. “You
don’t have to shout all the time. You can talk normally and
your colleague hears, even when standing further away.
Otherwise, when the engines are running at full power, they
are very loud and you always have to raise your voice, which
is a burden in itself. You also don’t hear little things in the
surrounding area, which you do now during ongoing site
work,” said foreman Sebastian Timpe. Therefore, the quieter
environment is also a safety-relevant aspect in regular construction
The machine has no restrictions in terms of performance
and application compared with the conventional version. The
battery is designed to last one working day (10 hours) and
can be charged easily overnight using a standard construction
site electric supply (32 A, 63 A).
Local zero emission
Sometimes the cement for this project is delivered by the Liebherr
concrete mixer ETM 905 with electric drum drive. In normal
operation the battery capacity is sufficient for the entire working
day. As a plug-in hybrid, the battery can be charged during the
journey or externally via a plug at a concrete mixing plant. i+R
also uses an electric compact excavator. Thus, deep foundation
work on a construction site is carried out for the first time using
almost exclusively electrically driven machines. Therefore, the
best possible combination of customer benefit, environmental
compatibility and efficiency is achieved. Estimated over one year,
approximately 35,000 litres of diesel fuel can be saved and more
than 92 tonnes of CO2 emissions can be avoided.
“The construction site at Bludenz-Bürs is a win-win situation
for everyone: enhanced safety and fewer traffic jams for
the local Vorarlberg people, and environmentally-friendly use of
construction machines on the currently largest ASFiNAG construction
site in Vorarlberg,” said Fromm.
To see the LB 16 unplugged in action, visit youtu.be/yZ96D4ZTtw8
and visit www.liebherr.com for more information.
The battery is designed to last one working day (10 hours) and can be charged
easily overnight using a standard construction site electric supply (32 A, 63 A).
22 Q4 2019 www.pilingcanada.ca