The use of ground penetrating radar (GPR) as a non-destructive and non-invasive technology for imaging subsurface features and assessing the integrity of railroad track substructure is discussed. The method is based on the principles of electromagnetic wave reflection and transmission at interfaces between distinct layers of varying dielectric properties. Repetitive electromagnetic pulses of energy at an appropriate frequency are launched into ground, and reflections from various subsurface layers are recorded in the form of an image. Higher frequency signals can not penetrate deep into the subsurface, but can provide high-resolution image of the upper layers. Lower frequencies can penetrate better and provide useful information about deeper layers.
|Original language||English (US)|
|State||Published - Oct 1 2004|
All Science Journal Classification (ASJC) codes
- Mechanical Engineering