Piled underpinning for a moving property

THE CHALLENGE

This project required a practical piled foundation solution that could be coordinated around access, excavation, ground conditions and the structural design. As with many mini piling projects, the key challenge was not only installing piles, but making sure the full foundation package worked: setting out, site levels, pile positions, reinforcement, concrete, inspections and handover information all had to be considered together.

Ground conditions and weather can quickly affect domestic and commercial foundation work. Open trenches may hold water, made ground can vary across a short distance, and access can limit the equipment and delivery methods available. The customer needed a piling contractor capable of reviewing the information, planning the sequence and progressing the work without unnecessary delays.

WHAT WE DID

Piling

The pile layout was reviewed against the proposed foundation arrangement and the site constraints. Mini piling was selected because it offered a practical method for transferring loads to deeper, more competent ground while remaining suitable for the working space available. The team planned the installation around the site access, working level, material storage and the follow-on ground beam works.

Steel ring beam / ground beam

Once the piling stage was complete, the reinforcement and beam details were coordinated to suit the engineer’s requirements. Ground beams and ring beams are a critical part of piled foundations because they connect the piles and spread loads from the building above. Care is needed around laps, corners, cages, cover, shuttering, pile heads, service routes and inspection before concrete is placed.

Concrete

Concrete placement was planned to suit the trench conditions, access and required concrete volume. On foundation projects, concrete is often delivered by mixer, volumetric wagon, pump, chute or barrow route depending on site constraints. The aim is to place the concrete efficiently while protecting the reinforcement, maintaining cover and avoiding unnecessary cold joints or delays.

THE OUTCOME

The works provided a robust foundation solution for the proposed structure and created a clear route for the customer to progress the build. The project is a useful example of why mini piling is often the preferred route where ground conditions, access, programme or building control requirements make standard foundations unsuitable.

If you have a similar project, send drawings, site photos, access details and any engineer or building control comments through the enquiry form. The team can review whether bottom-driven piles, screw piles, piled underpinning, traditional underpinning, ground beams, rafts, slabs or excavation support is most appropriate.