ROADWAY TUNNEL CONSTRUCTION WITH DRILLING-BLASTING METHOD; GÜMÜŞHANE ENVIRONMENT ROAD EXAMPLE

Abstract

The shortest route linking the Trabzon port with its strategic and commercial importance is the highway passing through Zigana Passage and Gümüşhane Passage. One of the most difficult geographical parts of Trabzon-Gumushane highway which is an international road is the part passing through Gümüşhane. In order to remove the geographical difficulties, there are 15 more tunnels between Trabzon and Gümüşhane. This tunnel is opened using the drilling blasting method. Within the scope of this study, 5 tunnels to be constructed between the first and eleventh kilometries of the Gümüşhane environment road will be operated with the second tunnel, which is the second largest tunnel according to the increase in kilometers. This tunnel is planned to be a double tube with a total length of 880 meters starting at Km: 3 + 450 and ending at Km: 4 + 330. New Austrian Tunneling (NATM) method will be applied along the tunnel route and excavation will be carried out by drilling-blasting method. Because the work is through the tunnel city center, there are many campuses in the study area. In this study, a drilling blasting design was made according to different rock mass classes in the tunnel and the damage to the surrounding settlements was examined in case of application of this drilling blasting design. In addition, the excavation and fortification works were examined within a certain detail and some statistical results were obtained.