November/December 2022 - 93

FEATURE ARTICLE
REDUCE. FOUNDATION REUSE. RECYCLE.
A Look at Foundation Reuse
From a Sustainability Perspective
Awareness of foundation reuse is rising
Engineers often consider wel ldesigned
and well-built projects,
completed on time and on budget, to be
successful, particularly if these projects
meet the design intent throughout their
operational life with an anticipated
amount of maintenance effort and
expense. The construction industry,
and society more broadly, is beginning
to appreciate additional project success
factors more fully, in the form of
societal impacts, natural resource
consumption, environmental pollution,
sys t em r es i l i ence and ove r a l l
sustainability considerations. A path
toward achieving sustainability goals,
for geotechnical works, is something
many of us already do in our daily lives:
Reduce, reuse, recycle. In this article,
the focus is on the second aspect, reuse,
wi th respec t to sus t a inab i l i t y
considerations for transportation
infrastructure foundations.
Reduce
At the outset, it is worth mentioning
that there are significant opportunities
for reduction and recycling in the
design and construction of geotechnical
works that do not necessarily involve
reuse. Foundation size can often be
reduced by using more advanced site
investigation techniques such as
geophysical techniques, seismic cone
penetration (SCPTu) and others, coupled
with modern computational modeling
analysis software, application of risk
regi st r ies and thought ful field
construction control. Minimizing
overdesign by reducing geotechnical
uncertainty and through effective
application of design codes for local and
regional practice can generally reduce
fo und a t i o n c o s t s , s ome t ime s
substantially. The reduced costs are a
result of material, labor and time
AUTHOR Derrick Dasenbrock, P.E., D.GE, F. ASCE, FHWA
DEEP FOUNDATIONS * NOV/DEC 2022 * 93
savings, which are also favorable for
sustainability. Reduction can also take
the form of using renewable materials
or less-processed resources. Timber
piling, aggregate columns and other
materials can be used for foundations
support. Where right-of-way allows,
reinforced " green " soil slopes may be
used to replace structural walls as a
design alternative, with sustainability
and environmental benefits. With
prices of raw materials, production,
shipping and installation escalating,
along with supply chain issues, use of
sustainable design and locally sourced
material alternatives can also have a
real impact on project costs.
Recycle
On the recycling front, exposed
foundation elements from previous
work can be removed and recycled if
they no longer serve a functional

November/December 2022

Table of Contents for the Digital Edition of November/December 2022

TOC
November/December 2022 - Intro
November/December 2022 - 1
November/December 2022 - 2
November/December 2022 - TOC
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