Preston Waste Water Treatment Works




Project Description

SCOPE OF WORKS 1500 No. 250mm square precast concrete

CLIENT United Utilities

EQUIPMENT Banut 700, Junttan PM20L

CONTRACTOR J N / Mott Macdonald Bentley

CONSTRUCTION PERIOD August 2016 – October 2016

Contractor JN Bentley awarded Aarsleff Ground Engineering the
contract to supply, handle, pitch and install precast concrete
piles, which will provide the foundation support to new storm
tanks for the Preston Waste Water Treatment Works (wwTw)

Aarsleff installed 1500no 250mm square driven precast concrete
piles installed to depths between 19m-21m below ground level
to support the new storm tanks. Piling in accordance with “ICE
Specification for Piling and Embedded Retaining Walls”, 2007, as
produced by the Institution of Civil Engineers.

Aarsleff carried out initial preliminary trial piling and probing to
the site including static load tests, dynamic load test and tension
load tests.

Employing Aarsleff’s Banut 700 and Junttan PM20L, the 2 rigs
worked simultaneously for the majority of works on site. We
maintained a fluid sequence during the piling works where
we catered for the clients build sequence by working in 15m
channels – allowing sectional concrete pour to take place.
Although this was a challenging sequence to work with due
to the limited operational space, Aarsleff coordinated well with
JN Bentley Site Management to successfully install the piling

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.

Our ISO accreditations are an assurance to you that we take governance seriously. Read our policies to discover more.

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.

Our plant workshop offers a range of services designed to ensure your plant works for you. Whether it’s manufacturing and fabrication of equipment for long-term needs or hire so you can complete something specific.