Magnum Push Piers
Steel push piers down to deep bearing ground, each tested.
The case in numbers
| Erquelinnes, 2026 | |
|---|---|
| Problem | Cracks in the interior walls due to subsidence on the left side |
| Phase 1 (mid-August) | Ground under the foundation stabilised with expanding resin (Deep Lift) |
| Phase 2 (end of August) | 9 Magnum Push Piers Ø 76 mm with friction lead |
| Layout | 2 at the front façade, 6 along the left side wall, 1 at the rear |
| Depth | Up to 15.85 m; seven piers to around 14.5 to 16 m |
| Test | Each pier individually at 400 bar (± 20 tonnes) for at least 15 minutes |
| Lift | 20 to 30 mm, under control, along the side wall |
| Report | Depth and pressure per pier |
The challenge
The house showed cracks in its interior walls. The cause was subsidence on the left side. The survey showed that the load-bearing ground lay very deep, so a shallow solution would not have been enough.
Step by step
- Mid-August 2026: ground under the foundation stabilised with expanding resin (Deep Lift)
- End of August: foundation exposed locally to about 1 m below ground level
- Nine Ø 76 mm Magnum Push Piers with friction lead installed, connected to the existing foundation with steel Magnum brackets
- Each pier pushed segment by segment until the resistance was sufficient
- 3 September: pushing along the side wall
- Each pier tested individually at 400 bar for at least 15 minutes
- Foundation lifted by 20 to 30 mm along the side wall and voids underneath filled by injection
Why two techniques?
Expanding resin strengthens the ground directly under the foundation, without digging. Magnum Push Piers transfer the load to bearing ground at depth. Here that ground lay deeper than 14 m, so we combined both: first stabilise the ground, then put the house on push piers and lift it under control.
The result
During the 400 bar test, about 20 tonnes of reaction force, no pier showed significant additional penetration. The foundation was then lifted by 20 to 30 mm along the side wall. Everything was recorded in an installation report with the depth and pressure of each pier.
With serious damage, have a structural engineer assess the situation. Soiltek is a specialist contractor: we record, measure, propose a technique and carry out the repair, in consultation with your engineer.