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Geotechnical News • March 2013
www.geotechnicalnews.com
GEOTECHNICAL INSTRUMENTATION NEWS
ings in the midst of construction and
the monitoring program.
Lesson learned 1: Work with cli-
ents, owners and contractors that
value the benefits obtained from
the monitoring.
With respect to the unforeseen pile
details, a good relationship with the
shoring contractor (Anchor Shoring &
Caissons Ltd) was vital in permitting
a practicable solution to be achieved.
Flexibility was essential to adapt to
the challenge presented as we worked
together with good communication
towards a solution.
It is our experience that this type of
challenge can be addressed when the
parties all understand the value of the
monitoring. It is therefore important
that those who do understand the value
do all that they can to convince others.
Lesson learned 2: Have redundancy
in the monitoring program.
When planning a monitoring pro-
gram it is important to have back-up
or build redundancy into the system.
Inclinometers and targets on the piles
utilize different methods to provide
horizontal displacement data that can
be correlated.
In this case, if the damaged incli-
nometer casing could not have been
recovered, the targets on the piles
were available as an alternative means
of measuring movement of the shoring
wall. In other instances, a string of
targets on the piles have been added
vertically to the face of the piles as a
substitute for an inclinometer casing,
although these alternatives would not
provide data for sub- surface move-
ments.
Marcelo Chuaqui, General
Manager
Wing Lam, Instrumentation
Specialist
Monir Precision Monitoring Inc.,
2359 Royal Windsor Drive, Unit 25,
Mississauga, ON, CAN, L5J 4S9,
905-822-0090, marcelo@monir.ca,
wing@monir.ca
Figure 3. Custom welded inclinometer
base.
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