GREAT CANADIAN PROJECTS
Augustana
Residential
Tower
To date, Doublestar
Drilling’s deepest
lagging system
Submitted by Doublestar Drilling
Doublestar Drilling (DSD)
was awarded the Augustana
Residential Tower project
during the fall of 2017. This
anchored soldier pile and lagging shor-ing
system was located in Edmonton,
Alta. With a total excavation depth of
19 metres, this became DSD’s deepest
lagging system to date.
Their piling crew was equipped with
DSD’s Soilmec SR65 drill rig to ensure
the design depths for the soldier piles
were met. In under two months, DSD
completed the H-beams for 68 soldier
piles to depths of 23 m.
DSD’s Soilmec SM14 tieback drill
installed approximately 176 anchors
to lengths of 18 m with a 36-millimetre
DSI threadbar. Prior to anchor installa-tion,
two pre-production test anchors
were completed to test the anchor
load. Based on these tests, the remain-ing
anchors were to be stressed up to
133 per cent of their design loads. By
the fifth row of tiebacks, the loads were
up to 900 kilonewtons, which required
using DSD’s 200-ton jack to meet the
project’s standards.
Due to the size of the project’s
footprint, this site quickly became a
high-volume area, keeping safety DSD’s
top priority. DSD worked with Pagnotta
Industries on the pre-project planning
to ensure no safety steps were missed
and everyone was on the same page.
Daily site safety meetings, organiza-tion
and communication were the
key essentials of making Augustana
Residential Tower project an overall
success and incident-free.
PHOTOS COURTESY OF DOUBLESTAR DRILLING
PILING CANADA 35