Note: This project was executed on a new build development in the UK, demonstrating Geobear’s capability to resolve utility defects non-intrusively.
On new housing estates—particularly those built on improved ground or reclaimed land—settlement of utility trenches is a common headache. When the bedding material settles, the sewer pipe sags, creating a "belly" that holds water and collects debris. Utility companies (like DEWA or ADDC) will refuse to take over (adopt) these assets until the defect is fixed, leaving the developer with ongoing liability.
On a new housing development in the North West, post-installation CCTV surveys revealed that several sewer lines beneath estate roads had developed pipe bellies. These defects, identified by standing water within the sewers, were the result of settlement in weak underlying soils.
The sewers were founded above 7–10 m of very soft alluvium, offering little natural support. Over time, ground weakness caused sections of pipe to sag, creating hydraulic inefficiencies and blocking adoption of the assets by the local utility provider.
Five separate locations across the estate required urgent remediation to reinstate the long-term stability of the sewers while keeping the roads fully operational.
