March/April 2022 - 69

A regular column showcasing successful
best practices for sustainable foundations
FOUNDATIONS FOR A SUSTAINABLE FUTURE
Low Carbon Solution at Neste Singapore Expansion
* The saved emissions is equivalent to:
What do these carbon savings
mean to the environment?
350
energy needed drive an
average car 350 times
around the earth's equator
(14 million kilometres)!
- or -
Neste, a global leader producing
renewable diesel and sustainable
aviation fuel, has invested $1.6B USD to
expand the production capacity of its
Singapore refinery by 2023. The
Singapore Expansion project will
increase its total capacity for producing
renewable solutions by up to 1.3
million tons.
The Solution
After extensive analysis, Keller
engineers were able to leverage the
reclaimed land's amenability to vibro
solutions. The two part solution
included densifying the sand layers
through vibro compact ion, and
consolidating and reinforcing the
underlying marine clay layers using
The design-build foundation solution provided a 75%
reduction in carbon emissions as compared to the
original driven pile solution for the tank structures.
The Challenge
The site across the expansion project
was highly variable and reclaimed. In
addition to satisfying the technical
performance, schedule and budget
requirements, the Keller team was also
challenged to develop a low carbon
solution to compliment the end product
- sustainable aviation fuel.
vibro stone columns. The solution did
not consider usage of any cement or
steel products.
The Benefits
Keller's innovative and cost-effective
solution with a 75% lower carbon
footprint resonated with Neste's
objectives. It also provided flexibility to
the structural designers during the
construction process.
AUTHORS Selvaganesh Selvaraju, Ravi Kumar and Seah Yeow Teck, Keller
DEEP FOUNDATIONS * MAR/APR 2022 * 69
1,224
powering 1,224 housing
development board units
in Singapore, for 1 year!
- or -
4,251
carbon sequestrated by 1,720
hectares (4,251 acres) of forest
in one year which is about
2.3% of Singapore's land area!
Total carbon emissions in terms of
greenhouse gas (GHG) CO equivalents 2
for tanks was about 1,152 t CO e using 2
vibro techniques versus 4,622 for a
typical solution using driven spun piles
- a savings of nearly 3,400 t CO e.2
* Source: EPA calculator at
https://www.epa.gov/energy/greenhouse-gasequivalencies-calculator
https://www.epa.gov/energy/greenhouse-gas-equivalencies-calculator https://www.epa.gov/energy/greenhouse-gas-equivalencies-calculator https://www.epa.gov/energy/greenhouse-gas-equivalencies-calculator

March/April 2022

Table of Contents for the Digital Edition of March/April 2022

TOC
March/April 2022 - Intro
March/April 2022 - 1
March/April 2022 - 2
March/April 2022 - TOC
March/April 2022 - 4
March/April 2022 - 5
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