Welford Road, Northampton


Project Description

Data   79.2 l/m open bore King Post Wall
Client  NC&JC Limited
Type of contract  Design and build contract
Construction period  September-October 2023

Retaining walls are useful in a wide range of scenarios. From coastal defence to highways management and wastewater treatment works, applicable across the energy, commercial, infrastructure, maritime, marine, residential, and rail market sectors, retaining walls are structures designed to restrain soil to a slope that it would not naturally keep to. Where the general public are perhaps most familiar with retaining walls, however, is in residential settings, usually for the use of retaining gardens to mitigate issues with slipping and subsidence.

Over 20 days in September 2023, Aarsleff Ground Engineering installed a 79.2 metre open bore king post wall in Northampton for this exact purpose. The wall was constructed to retain up to 2.2m and was constructed using an open bore method, which utilises 600mm diameter boreholes to found the posts for the wall.

When Aarsleff arrived on site to begin work, we became aware of a number of live services on site. The scheme was already designed to avoid a storm drain and sewer service but we quickly discovered the presence of underground cables intersecting the pile line. This was revealed to be a live BT service and therefore, Aarsleff’s design engineers quickly reacted to adjust the design to suit. The pile line was refined in a way that ensured there was no increase in section size or length of material. This meant that not only were costs limited for materials, but the potential extension of the programme was limited and operational delivery could quickly restart.

Speaking on the project, Zohaib Khan, Project Manager, said, “A very interesting and challenging project where Aarsleff’s design and operational expertise came together to determine solutions across various aspects of the project to meet our client’s needs.”

The project was completed in 20 working days. This is a prime example of Aarsleff’s ability to react to unexpected challenges and solve them in a quick and efficient manner, with minimal effects on cost and programme for our clients.

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.