SqueeSAR™ measures ground displacement associated with tunneling activities.

Underground tunneling can produce subsidence at ground level. SqueeSAR™ can detect millimeter scale surface displacements to monitor the stability of the ground above tunnel networks and the surrounding areas.

Monitoring for Subsidence
Ground deformation due to tunnel construction can be mapped remotely using SqueeSAR™. Surface deformation over tunneled areas is used to identify ground movement that could potentially damage surface infrastructure.

SqueeSAR™ uses historic radar imagery to measure baseline rates of movement occurring over both existing and planned tunnel locations, as well as the surrounding areas. By mapping the temporal evolution of ground displacement occurring before and during construction, engineers can better understand the relationship between groundwork and the onset of any related ground movement.

Subsidence maps also provide data for legal disputes concerning damage claims.

Post-Construction Movement
Regular monitoring of post-construction ground movement allows engineers to identify differential displacement and subsidence (or uplift) that could indicate tunnel weaknesses.