Atlas InSAR is a powerful tool for monitoring transport hub corridors both during construction and servicing. Atlas InSAR enables the detection of millimetric ground movements associated with subsidence, landslides, underground excavations or infrastructure instabilities.
By providing wide‑area, non‑intrusive monitoring, it supports early risk identification, targeted inspections, and proactive maintenance, improving safety and service continuity while reducing lifecycle costs.
With a revisit frequency of just a few days, a pixel spatial resolution reaching 1m, and measurement densities above 50,000 points/km², Atlas InSAR is the ideal tool to optimise costs and mitigate risks in tunnels and underground projects.
• Historical deformation insight: Identify pre‑existing ground movements before construction to support risk assessment and optimise the instrumentation strategy.
• Wide‑area control beyond the ZOI: Monitor deformation magnitude and extend beyond the contractual Zone of Influence (ZOI), including impacts from third‑party activities and dewatering, and verify the stability of reference benchmarks.
• Flexible and scalable monitoring: Increase acquisition frequency during critical project phases and receive tailored deliverables aligned with construction activities and risks.
• Cost‑efficient monitoring: Support early removal of selected ground sensors as works progress, reducing installation and operational costs while preserving deformation control.
• Independent monitoring system: Provide owners and contractors with an independent, 24/7 accessible deformation monitoring system.
• Third‑party protection and claims support: Assess the impact of tunnelling on nearby buildings, while maintaining an inventory of vulnerable assets to support protection strategies and claims management.
What InSAR captures for tunnelling:
• Surface settlement troughs above and around tunnel alignments.
• Differential movements of buildings and infrastructure.
• Deformations associated with shafts, portals, and dewatering.
• Long‑term post‑construction and residual consolidation.