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Unique to deep foundations is a pile driving spotter with
an onboard computer. This invention prevents torsional
loading of a lattice boom, and has earned the company rights
to a US patent.
On the site of the Rise, deep foundations was required to
install 300 interlocking secant piles to a depth of 26 metres to
form a watertight wall for excavation support, with an interlock
of 300 mm, an excavation depth of 15 metres.
Due to the soil conditions, most of the piles were drilled
to a depth of 30 metres, which is unusually deep for a condominium
secant wall. This requirement resulted in a very strict
tolerance of just 0.4 per cent for the verticality of the piles. In
order to maintain quality control within these precise limits,
the company made use of a laser tool that was designed
and manufactured by deep foundations for positioning.
Horizontal location was controlled by the construction of
guide walls.
Furthermore, the pile toes were dug much deeper than the
excavation in order to resist hydrostatic pressures and heaving
of the base. The secant wall was supported by two rows
of 128 mm diameter post grouted soil anchors. The vertical
drilling was achieved in 100 days using two BG40 drills. Deep
foundations supplied all of the equipment from within its
own holdings, using materials supplied by Dufferin Concrete,
Ennis Steel Industries, Inc. (piles) and Canadian BBR Inc.
(tiebacks).
Safety
On the Rise site, as in all its projects, deep foundations
exerted every effort in order to foster an excellent culture of
safety at all levels of the company. Job site safety is held in
high regard at deep foundations, where the company’s proactive
and team-based approach to incident prevention has
made it a role model in the industry.
“Deep foundation's health and safety program is integrated
into the company's total management system; this ensures
that safe work practices and job site accountability are considered
part of the job,” said Rise project manager, Mike
Sousa. “Our Annual Safety Month provides valuable direction
and motivation to our employees to help reach the milestone
of zero lost time injuries. It also provides an opportunity to
facilitate discussions to identify areas for improvement and
foster a team-building culture.”
For this dedication, the company was honoured with the
Toronto Construction Association Award for Outstanding
Safety Culture in 2015; the winner of this award is chosen from
among the association’s 1,500 member companies. Deep foundations
was previously recognized with the Best Managed
Company award in both 2013 and 2014, and has won the
International Association of Foundation Drilling (ADSC)’s
Outstanding Safety Award numerous times since 2007.
In addition to these accolades, deep foundations achieved
its Certificate of Recognition (COR) in 2014, endorsed by the
Infrastructure Health and Safety Association, becoming one
of the first contractors to receive this designation in Eastern
Canada and reinforcing the company’s commitment to its
workers and workplace safety.
“Everyone at the worksite shares responsibility for health
and safety, and job site accountability is part of it. Pre-job
PROJECT SPOTLIGHT
CONTINUED ON PAGE 50
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