Combined Active and Passive Seismic Investigations on Railroad Embankments

The present study introduces combined active and passive seismic investigations on a railroad embankment that is constructed on a soft layer of peat clays. This type of sediments causes the embankment to be in a dynamic movement whenever trains are passing. As long term consequence the stability of the embankment is affected. Based on the concept of seismic interferometry temporal changes in the medium due to the heavy dynamic force load induced by the train can be identified. Furthermore, velocity information of travling body waves that have been retrieved by cross-correlating the signals of train passages are compared to results from seismic crosshole measurements.