installation and placement of marine materials. The following
points provide the scope of pile driving work this project
entailed.
• Removal and relocation of nearly a football field worth of
armour stone – some nearly the size of a compact car.
• Excavation and clearing the driving line for the combiwall
with an overall length of 226 metres.
• Accurately driving 98 piles of 1.1 metre diameter, up to
18 metres long down to rock. Lace sheets of equal length
between each pile.
• Drilling out the overburden within the piles, then proceeding
to drill a three-metre rock socket.
• Air lifted and tremie placed concrete within the piles.
• Drilled 79 tiebacks, 31 metres long off a barge, through the
pile. Each tieback was a 14-strand DCP anchor.
• Backfilled, graded and compacted material behind the
completed wall.
“Toronto Zenith was our primary subcontractor, forming
and pouring the concrete cap beam and parapet wall,”
Reinders added. “They completed an excellent job and
adapted well to the varying water conditions.”
Pile driving challenges
As for challenges the Bermingham team faced, Reinders
says installation tolerances were tough to maintain with a
combi-wall.
“To control the placement of the wall, a template was built
to facilitate the installation of nine piles and seven sheets.
The crew quickly became familiar with the process and was
able to install all piles, sheets and even relocate the template
within a week. This process resulted in the last pile along the
wall being only 0.11 metres over the course of 204 metres!”
The project was visible to the general public and frequently
harboured vessels with an eight-metre draft. This required
drilling operations to be contained to avoid silt suspended
in the water and sediment moving into the channel. While
What’s your story?
If your work is deep under Canadian soils,
Piling Canada wants to know about it and
share it with our readers.
Make sure the industry knows who you are. To inquire about being featured in a company profile
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Phone: 866-953-2182
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PROJECT SPOTLIGHT
Rock socketing
38 Q3 2015 www.pilingcanada.ca
/www.pilingcanada.ca
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