Hong Kong-Zhuhai-Macao Bridge Monitoring

Challenge

The Hong Kong-Zhuhai-Macao Bridge is a mega cross-sea transportation project with a total length of 55 km, including 22.9 km of bridges, a 6.7 km immersed tunnel, and two artificial islands. With a design service life of 120 years, monitoring structural integrity across this massive infrastructure in a harsh marine environment presents extreme challenges.

Solution

Deployed L2-Norm Quasi 3-D Phase Unwrapping assisted multitemporal InSAR for dynamic deformation monitoring. This advanced technique enables accurate tracking of deformation rates and thermal expansion coefficients across the entire bridge structure despite the complex marine atmospheric conditions.

Result

Successfully generated comprehensive deformation rate maps and thermal expansion coefficient maps for the entire bridge. Time-series analysis at characteristic monitoring points validated structural behavior under varying thermal loads, with blue curves representing deformation and green curves representing temperature correlation.

Scientific Results

Figure 1: Top: Deformation rate map (A) and thermal expansion coefficient map (B). Bottom: Time-series at monitoring points P1-P4 showing deformation (blue) and temperature correlation (green) over the monitoring period.

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