May/June 2024 - 107

excavation reached its final state. The
top of the WPIC wall cantilever soldier
beams displaced less than 0.13in (3 mm),
and the O'Hara Wall displaced less than
0.25 in (6 mm). This amount of
movement, when normalized to the
height (H) of the monitoring point above
the bottom of the excavation, indicates
less than 0.10%H of movement (MAX =
0.10%H, AVG = 0.05%H). The recorded
displacement data suggests a well performing
support of excavation system.
Summary
The layout of the new facility foundation
allowed the reuse of the existing
foundations walls present on site. In
traditional construction, they would
have been removed and replaced
resulting in more time, materials and
ultimately costs passed to the owner.
The existing walls were investigated for
their reuse, and a shotcrete overlay was
used to bring the existing wall up to
current codes to extend the service life.
With this support of excavation solution,
specialty construction equipment was
mobilized, and a nontraditional construction
method was employed.
Challenges of the partial LRDC wall
removal and drainage conditions
occurred during construction but
were quickly addressed with close
coordination and communication
among the construction team. The load
testing of rock bolts and monitoring data
have confirmed the performance of the
support of excavation system for the
future recreation center.
Andrew Moran, P.E., senior design engineer,
has been with Nicholson Construction for
more than 13 years. Moran started his career
as a field engineer with Nicholson's Midwest
region. After two years, he transitioned into
Nicholson's design department where he
currently serves a technical role to support
the company's objectives
With this support of excavation solution, specialty
construction equipment was mobilized, and a
nontraditional construction method was employed.
Wall displacement versus time
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May/June 2024

Table of Contents for the Digital Edition of May/June 2024

TOC
May/June 2024 - Intro
May/June 2024 - 1
May/June 2024 - 2
May/June 2024 - TOC
May/June 2024 - 4
May/June 2024 - 5
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