Radar interferometry for monitoring of settlements in tunnelling

Radar interferometry for monitoring of settlements in tunnelling An innovative approach employing the Persistent Scatterer Interferometry to monitor area-wide settlements induced by tunnelling is presented. The method is based on data from 24 overflights of the TerraSAR-X satellite provided by the German Aerospace Center (DLR). Exemplified on the tunnelling construction site Wehrhahn-Linie located in Dusseldorf, the performance of the Radar-Interferometry method is demonstrated. Besides the basic principles of the Radar-Interferometry, the contribution illustrates specific boundary conditions of a tunnelling project in the intra-urban area of the state capital city of Dusseldorf. The validation with point wise terrestrial measurements proofs that the method is accurate to a millimetre. The research project is part of the Collaborative Research Center 837 Interaction modelling in mechanized tunnelling at the Ruhr-University of Bochum.