Challenge
Seasonal clay shrinkage was causing differential settlement and structural movement, requiring a permanent ground stabilisation solution without major excavation or disruption to the occupied property.
Solution
Geobear delivered precision geopolymer injection to strengthen and stabilise shrinkable clay soils, improving bearing capacity and reducing future movement risk with minimal disruption.
Movement driven by seasonal moisture variation
Beneath affected foundations
No excavation or underpinning required
The property was founded on shrinkable clay soils susceptible to seasonal volume change. Extended dry periods had caused desiccation of the clay, leading to ground contraction and differential settlement beneath sections of the foundations.
Visible cracking and movement indicated a need for intervention to stabilise the ground and protect the long‑term performance of the structure.
Traditional underpinning would have required intrusive excavation works, extended programme duration and significant disturbance to occupants.
A solution was required that would address the root cause — weak, shrinkable soils — while minimising disruption and preserving the integrity of the existing structure.
Geobear implemented a controlled geopolymer injection programme designed specifically for shrinkable clay conditions. Small‑diameter injection tubes were installed adjacent to the affected foundations.
The two‑component geopolymer was injected at depth, where it expanded to densify the clay, fill voids and increase stiffness. Injection volumes and pressures were carefully managed to avoid overstressing the structure while achieving measurable ground improvement.
The rapid curing properties of the geopolymer enabled stabilisation works to be completed efficiently with minimal impact to the property.
Ground stiffness and bearing capacity were improved, reducing the risk of ongoing differential settlement linked to seasonal shrink–swell cycles.
The property was stabilised without excavation, underpinning or prolonged disruption, delivering a technically robust and programme‑efficient outcome.
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