international
construction
april 2014
TUNNELLING
42
Unique challenges
the salt water—we had to inspect everything,” he
added.
The machine had also been stopped with
its thrust cylinders in, and as a result certain
components could not be replaced before the
machine started up. “Since we only had limited
general assembly drawings from theCatmanual,
we had to work backwards to create a new
programme,”Mr Pinkham said.
The refurbishment project took four months,
and was completed on schedule. Mr Pinkham
said, “We took on a project that nobody else
would. We were able to rebuild an unknown
machine from an unknown supplier, working
outside our system. There were no detailed
drawings to refer to, just our observations.”
ANEW
GENERATION
OF ROTATING
TELESCOPIC
HANDLERS
tracce.com
ROTATINGTELESCOPIC
HANDLERSRANGE:
RTH4.18
•
RTH5.18
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RTH5.21
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RTH5.23
RTH5.23SMART
•
RTH5.23S
•
RTH5.26
RTH5.26S
•
RTH5.30
•
RTH6.24
HEAVYCAPACITYTELESCOPIC
HANDLERSRANGE:
HTH15.10
•
HTH20.10
•
HTH25.11
HTH30.12
•
HTH35.11
HTH40.13
•
HTH45.14
theperfect compromisebetween
priceandperformances, thebestmachine for rental fleet
RTH5.23SMART
struck theEastCoast of the countryduring the autumnof 2012,
causintgwidespreaddamage.
TheTBMhadbeen excavatingunder highpressures in clay and
sand for theharbour’sSiphonwater line replacementproject.But
the storm flooded the entire tunnel, submerging the machine
460m into the bore.
The jointventurecontractorsturnedtoRobbinsfortheextensive
repairworkneeded, followingCaterpillar’s announcement that it
was exiting theTBMbusiness. Robbins field servicemanager for
theAmericas, JeremyPinkham, said99%of theelectrical systems
on the TBM needed replacing. “Some parts were corroded by
Alsina offersModular Curved formwork for the construction
of false tunnels and tunnel entrances.
