Rigid Inclusions (RI)

What are rigid inclusions?

Rigid inclusions are a ground improvement method whereby modulus columns are installed through compressible soils to increase bearing capacity of the ground and control settlements in conjunction with a load transfer platform. The efficiency of the method depends on a number of factors, but the method is often used as an alternative to piling for a wide range of structures, including warehouses and distribution sheds, due to its rapid installation and reduced material costs. As a specialist ground improvement contractor, Aarsleff can install a bespoke solution to meet your project’s needs either solely with rigid inclusions or in combination with driven and CFA piles.

How are rigid inclusions installed?

Rigid inclusions are typically installed using a displacement auger . The rig bores down to the design depth, pushing the ground laterally with minimal spoil generated. The auger is then removed, with concrete pumped through the stem as it goes to support the bore. Zone tests are undertaken on the ground to verify performance.


  1. Can be used in weak soils to improve the bearing capacity for a wide range of loads
  2. Applicable across a wide range of sectors and projects
  3. Can be faster and cheaper than piled alternatives due to lower strength concrete and absence of reinforcement
  4. Carbon reduction vs traditional piled solutions can be achieved using high replacement lower strength concretes

Rigid inclusions are a versatile solution, perfect for many needs across different sectors. As a rigid inclusions contractor, we are committed to delivering operational excellence in ground engineering, which means we are laser focused on creating value within your scheme. Contact us today to discuss your next project with one of our experts.

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For more information about Aarsleff Ground Engineering or to send in your enquiry,
call 01636 611140 and speak to an expert member of our team today.

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.