Application Of Geophysical Methods To Evaluate Rail-Track Subsurface

Geophysical tests are being conducted on sections of active main line rail-track adjacent<br>to major rivers, in areas of considerable ground movement. Various methods used include<br>ground penetrating radar (GPR), very low frequency (VLF), resistivity (TRP), seismic, terrain<br>conductivity (TC) and gravity. This work is part of a project to develop a mobile rail track<br>sensing and monitoring system (1). The goal is to provide real-time assessment of track subsurface,<br>and surface conditions significant in maintaining a stable, safe and productive track (2)