all calculations were accurate and to
optimize on the most effective drilling
method in respect to both time
and money.
Aarsleff is currently on-site drilling
28 piles with a diameter of 2,000
millimetres and a maximum length
of 70 metres – the deepest bored piles
ever to be executed in Denmark as
production piles. Ground conditions
comprise a 10 to 12 metre layer of
sand followed by clay of high plasticity.
Generally, this soil type has numerous
problems due to its low strength, high
compressibility and high level of volumetric
changes. Clay of high plasticity
is typically found in coastal regions
around the world.
Aarsleff Ground Engineering is
responsible for overseeing the drilled
piles at The Lighthouse project. The
onsite team is comprised of 14 members,
including one fulltime health and
safety inspector.
Due to the high plasticity of the
clay, the 2,000 millimetre casings
were not installed to full depth and
used to stabilize the drilled hole.
The bentonite will be cleaned before
concreting to achieve the correct
amount of sand content according to
European Standard.
To reduce traffic congestion, Aarsleff
designed a program to only cast piles
outside of rush hour, thus ensuring the
supply of fresh concrete, totalling 5,900
cubic metres, could always be delivered
on time and without disruption.
To ensure the quality of the piles and
provide assurance to the main client,
Aarsleff set up a mobile laboratory on
site to provide a transparent means of
guaranteeing the best quality of product.
The laboratory is equipped with
modern technologies and is operated
by qualified technical personnel who
conduct tests and analysis of the concrete
before installation. Aarsleff also
conducted tests such as SONICaliper
for the verticality and Cross Hole
Sonic Logging for the integrity of
the concrete.
Due to the site’s restricted space,
Aarsleff ’s newest technologies – Virtual
Design and Construction – has been
utilized in the planning stages to model
the construction site. This enabled
the team to co-ordinate effectively
the logistics on site, including the
execution, transport and stationing of
workers and material to achieve the
project both safely and efficiently.
The Lighthouse projects mark
another “One Company” collaboration,
whereby Aarsleff have involved several
departments and companies of the
Aarsleff Group to draw versatile expertise
and experience
Building the Lighthouse project is
expected to run over three years, and
final completion is expected in 2022.
For more information about Aarsleff
Ground Engineering and the Aarsleff
Group, please contact tender manager
Marianne Borup Jensen at +45 6120 8254
or email maje@aarsleff.com.
INDUSTRY NEWS
The Lighthouse, scheduled for completion in 2022, will keep in line with
other iconic Aarhus Ø architecture, such as The Iceberg and Dokk1
PIOVESEMPRE/123RF PHOTO: AARSLEFF GROUND ENGINEERING
84 Q1 2020 www.pilingcanada.ca
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