Ground settlement monitoring for tunneling projects
with satellite InSAR data
Expanding urban development and densification has increased the number and size of tunneling projects.
Excavation works, and the associated civil engineering activities such as dewatering (the removal of ground water), can cause subsidence in an area extending well beyond the actual tunnel. The resulting ground displacement is a major risk to the existing infrastructure.
InSAR data provides critical information for understanding ground instability as well as monitoring the impact of tunneling and groundwork activities on buildings and infrastructure.
Satellite data provides valuable ground displacement behavior information from prior to, as well as during, tunneling operations. This information can be used to assess the postoperative relationship between groundwork possible related subsidence that may impact infrastructures.
Assess Ground Stability
With satellite image archives dating back to 1992, historical InSAR analyses can assess past ground stability patterns, and complement existing geotechnical information, to identify unstable areas. Determining areas of ground instabilities help make informed decisions during the design-phase of projects and mitigate potential risks.
Monitor Surface Behavior and
InSAR monitoring provides reliable data to understand the relationship between tunneling construction activities and ground settlement, throughout all phases of the project. InSAR can be used in conjunction with in-situ measurement data to confirm results and provide a greater understanding of the extent of surface motion resulting from this activity.
Spatially dense and precise results
InSAR provides high density displacement measurement point data with millimetric precision. InSAR also complements real-time, in-situ surveying, such as leveling and inclinometers, to validate and expand results.
Non-invasive and scalable technique
Satellite InSAR is completely remote. It is unrivaled in its ability to obtain displacement measurements over large or small areas.
InSAR is the only ground monitoring technique, providing highly dense displacement measurement data, that is very cost-effective when compared to alternative survey techniques.
Satellite data archives extend back to 1992 and can be processed to provide historical movement trends.