Newark Re-Sewerage

INSTALLING A COFFERDAM FOR A NEW OUTFALL STRUCTURE INTO THE RIVER TRENT

 

Project Description

SCOPE OF WORKS 254No. L605 sheet piles of 10m

EQUIPMENT High-Frequence Vibratory rig, Crawler Crane

CONTRACTOR Nmnc & Barhale, part of the BNM Alliance

CONSTRUCTION PERIOD Installation: 8th January – 13th February 2019 Extraction: 25th March – 12th April

Aarsleff Ground Engineering have completed on site
installing and extracting a sheet piled cofferdam on
Water Lane in Newark, as part of waste and water
improvements in the town. Severn Trent’s £60 million
investment to upgrade Newark’s sewerage and water
systems will help protect over 400 homes that are
currently at risk from flooding.

The project was Aarsleff’s fourth sheet piling contract on
the scheme, having previously installed sheet piles for a
cofferdam on Harcourt Street and two sheet piling projects
on Queens Road, all which were awarded and completed
within a two-year period.

Whilst on site, Aarsleff utilised their vibratory hammer
rig to install 254No. L605 temporary sheet piles of 10m to
form a cofferdam that extended into the river Trent. Before
commencing works, Aarsleff installed a temporary silt
curtain and oil boom around the working area in the river
to help protect the surrounding environment and prevent
any contaminate liquids and riverbed dirt drifting down
the Trent.

The works allowed the BNM Alliance to replace a new
outfall structure, along with repairing and relining the
current culvert that was situated underneath Water Lane.
Once the repairs and new outfall were finished, Aarsleff
returned to the site to remove the sheet piles, silt curtain
and oil boom.

Aarsleff’s Senior Technical Estimator Ashley Carter said,
“It is a great endorsement of Aarsleff’s work that we have
been awarded another contract for the same scheme in
Newark.”

“We have previously installed Cofferdam’s for the scheme,
but this one involved working over the River Trent,
retaining the water for Nmnc to replace a new outfall
structure.”

Aarsleff commenced sheet piling works at the beginning of
January, with the install taking 6-weeks to complete. The
extraction of the piles took place 5-weeks after installation
of the piles.

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Case Study

A leading UK ground engineering specialist, focusing on multi-discipline excellence and value engineering. We design and deliver some of the UK’s largest ground engineering projects.

Our vision is to bring confidence to those constructing the landscape of tomorrow .

1947. Central Jutland, Denmark. Per Aarsleff borrowed 10,000 Danish Kroner from his father’s life insurance, bought an excavator, and founded Northern Europe’s leading contracting company.

Our biggest asset, our team is composed of the leading experts in ground engineering. Working with collaboration and cohesion at the core of our business, we can guarantee a quick and founded answer to all your questions.

We recruit and reward our people based on our ‘Step into the Blue’ company culture, where we embrace the core values of Life and Health, Trust, and Responsibility.

We do everything to ensure our team and yours work safely on our sites. With our core value of Life & Health, we see safety as a cultural pillar.

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The projects that keep society running. Bridges, buildings, transit and rail facilities, embankment support, marine and offshore facilities, mines, airports, and water projects.

Keeping things turning. Sewage Treatment Works, Waste Water Treatment Works, Wind Farms and Wind Turbines, Biomass Plants, and Power stations.

Meeting society’s needs. Nursing and care homes, MOD buildings, Schools and Universities, and small or large-sized residential developments.

Staying on the move. Remediation, bridges, and foundation work are integral to keeping the industry running smoothly.

The landscape of the marketplace. Mega-retail sheds, distribution warehouses, University accommodation, and major supermarket and household name units.

Keeping things afloat. Ports and harbours, coastal defences, river embankments and inland waterways.

Technically trained estimators and a dedicated, in-house design team means we consider value-engineering at every stage of your project.

More than just a model, Visual Design & Construction is a tool to encourage collaboration and improve quality across all facets of a scheme.

From large commercial sheds to small residential plots, piling could be the foundation solution you need to support your project.

Issues around collapse, slipping or erosion? Our experts in retaining solutions have a broad portfolio of techniques designed to fix even the most nuanced of sites.

Tricky ground conditions or requirements? Aarsleff’s ground engineering team work on stabilisation through a varied range of techniques, bespoke to the properties of your site ground.

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