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London slab re‑levelling – Kentish Town City Farm

Challenge

Settlement beneath a concrete slab at Kentish Town City Farm caused uneven surfaces and loss of support, requiring re‑levelling without disrupting daily activities.

Solution

Geobear delivered precision geopolymer injection to fill voids, re‑support the slab and achieve controlled re‑levelling with minimal disruption.

Community facility

Operational city farm environment

Slab re‑levelled

Voids filled and support restored

Non‑intrusive method

No slab removal or excavation

Background

At Kentish Town City Farm, sections of concrete slab had settled due to void formation and weakened sub‑soils. Uneven surfaces posed operational and safety concerns within a busy community setting.

A remediation strategy was required that would restore level and support while maintaining access and minimising disruption.

Challenge

Traditional removal and reconstruction of the slab would have required extensive excavation, programme delays and interruption to farm activities.

The client required a fast, controlled solution capable of re‑levelling the slab and stabilising the underlying ground in situ.

Solutions

Geobear implemented a targeted geopolymer injection programme beneath the affected slab areas.

Small‑diameter injection points were drilled through the slab to introduce a two‑component geopolymer into voided and weakened zones. As the material expanded, it filled voids, compacted loose soils and gently re‑levelled the slab where required.

Injection was monitored in real time to ensure precise control and protection of the surrounding structure.

Results

The slab was successfully re‑levelled and stabilised without excavation or replacement.

Works were completed quickly within an operational community facility, delivering a durable and lower‑carbon alternative to traditional reconstruction.

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