Project overview
On Christmas Eve in 2010, a property in Finklegate, Norwich, experienced significant subsidence, with an estimated movement of 300 mm. Consulting Engineers Canham Consulting engaged us to carry out a site investigation to determine the cause of the subsidence and provide data for designing mitigation measures. The subsidence was suspected to result from loose soils caused by ruptured underground services.
Our approach
We conducted a detailed investigation using:
- A dual-purpose window sampling and dynamic probe rig, which was operated within the scaffolding erected to stabilise the property.
- Conventional hand-digging techniques to navigate the numerous underground services present on-site.
The investigation focused on identifying the vertical and lateral extent of loose soils and assessing the soil density and composition around the affected area.
Outcome
Our expertise in soil analysis and geotechnical interpretation provided critical data for the client’s mitigation strategy. Despite the challenges posed by underground services and stabilisation scaffolding, the investigation was successfully completed. Unfortunately, due to the extent of the damage, the property was subsequently demolished.
Key details
- Client: Canham Consulting
- Cost: Not disclosed
Our investigation delivered vital insights into the subsidence cause, enabling informed decisions on mitigation and ensuring the safety of the surrounding area.