Interpipe Inc. is a steel pipe distributor of new
and used structural steel pipe. We have several
large stocking locations of Seamless, ERW,
Spiralweld and DSAW pipe.
2" OD–48" OD in a variety of wall thicknesses
are stocked in all locations.
Piling Pipe 80,000 min yield seamless pipe for
Micro Piling.
Seamless and ERW pipe for Driven Piles,
Screw Piles and Drill Piles.
Large Diameter pipe for Driven Piles or
Caissons.
ONTARIO
3320 Miles Road, RR#3
Mount Hope, Ontario
L0R 1WO
Local: (905) 679-6999
Toll Free: (877) 468-7473
Fax: (905) 679-6544
QUEBEC
805 1 ère Avenue
Ville Ste. Catherine, Quebec
J5C 1C5
Local: (450) 638-3320
Toll Free: (888) 514-0040
Fax: (450) 638-3340
www.interpipe.com
“Brewster Drilling and Piling arrived onsite in late
September 2018 and began installing test piles on Oct. 5,
2018,” said Kyle Fetterly, Brewster Drilling and Piling’s Eastern
Canada manager.
“We installed 14 test piles at varying depths and carried
out pre-production testing in order to confirm the design
assumptions before commencing work on production piling.”
Materials and equipment used
“Steel casing was installed through fill/peat material from
surface to a depth of six metres,” said Fetterly.
“Titan hollow bar T103/T52 bars were used to complete
the installation to depths of 21.5 metres. A total of 3.5 million
pounds of cement was sourced locally and used to complete
the installation.”
A MDT 230B dual rotary drill rig was used to install 300
millimetre and 200 millimetre casing to six metre depths.
A Commachio MC8D was used with a TEI 1000 drifter
to install the hollow bars.
“An Obermann VS109 grout plant coupled with a DMI
60,000-pound cement silo was used to mix and deliver grout
to the drill rig as required,” said Fetterly. “A 300-tonne hollow
core jack and reaction beams were used to proof test the piles.”
Due to the nature of the local carbonate geology, it was
determined to be the best option to reduce vibration and
project costs.
“Previous installations were plagued with refusal criteria
issues. When conducting re-taps, piles which had previously
achieved refusal criteria would mobilize and continue to
move until they reached the basalt 150 feet to 160 feet below
grade. The size of the site, the local geology and the proximity
to residential properties made it a perfect candidate for
hollow bar technology.”
While a near surface void was encountered onsite early
in the construction process, it was determined to be an old
septic pit, which was not documented. Activities were suspended
until the site could be scanned for additional voids
using a ground penetrating radar.
The completed structures consist of a 67.4-metre tall
concrete chimney, the powerhouse which houses the four
main engines, the electrical annex, a tank farm, a water
treatment plant and four transformer pads.
Unique challenges
The biggest challenge of this project was its location on a
remote island in the Atlantic Ocean, which proved difficult
from a logistics perspective.
“Getting materials or parts to the island could only be
achieved by air or ship,” said Fetterly. “Co-ordinating shipment
with numerous suppliers from Bermuda, the U.S.,
Canada, and Europe, was critical to the project schedule. The
crew was also required to travel to and from site by moped
as non-residents are not permitted to drive vehicles with an
engine exceeding 50 cc.”
Sand-filled voids and cavernous conditions existed onsite
which meant special care had to be taken to ensure the quality
of the installations.
Logistics for the project were also challenging due to the
aggressive project schedule. Two drill rigs, a silo and grout
GREAT CANADIAN PROJECTS
PILING CANADA 29
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