Assessment of rock slope stability along the proposed Ankara-Pozanti autoroad in Turkey

The main objective of this study is the determination of the slope stabilit y and excavatability category of discontinuous rock exposed between 53 + 00 0 and 58 + 000 km of the proposed Ankara-Pozanti autoroad in Turkey to prov ide secure access. The-study area is mostly in the outcrops of highly joint ed sandstone with minor layers of marl. This Maastrichtian-Eocene Group als o contains conglomerate and limestone bands of flysch character called the Pasadag Group. Quaternary alluvial deposits occur throughout the site. The area was divided into four design sectors based on cut slope locations. Roc k slope stability was assessed kinematically as well as through utilizing l imit equilibrium analyses. The excavation category was determined to range from hard to extremely hard ripping. Remedial measures for unstable rock sl opes are discussed.