Imaging of the deteriorations and concrete quality of the tunnels (Zigina, Torul) with ground penetrating radar

Ground Penetrating Radar (GPR) that give high resolution image and no damage to the researched surface, holds an important place in the use of near surface shallow researches. In this study; it is aim to investigate the fracture-crack system, the stratigraphy and the deterioration of the walls of Zigana Tunnel which is located at the way Trabzon-Gümüşhane in order to evaluate the existence of risk area leaking water out and structure contents. Furthermore, in addition to Zigana tunnel, the concrete quality of the Torul tunnel which has built recently was investigated. During examinations, GPR data were collected along totally 20 profiles at the entrance of the both sides of tunnels by using 500 MHz and 800 MHz shielded antennas. After applying data processing stages to the collected data, 2D and 3D images were acquired and interpreted.