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

Avci K., Akgun H., Doyuran V.

ENVIRONMENTAL GEOLOGY, vol.37, pp.137-144, 1999 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 37
  • Publication Date: 1999
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.137-144
  • Keywords: rock slope stability, excavatability, kinematical analysis, limit equilibrium analysis
  • Middle East Technical University Affiliated: Yes


The main objective of this study is the determination of the slope stability and excavatability category of discontinuous rock exposed between 53 + 000 and 58 + 000 km of the proposed Ankara-Pozanti autoroad in Turkey to provide secure access. The-study area is mostly in the outcrops of highly jointed sandstone with minor layers of marl. This Maastrichtian-Eocene Group also 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. Rock slope stability was assessed kinematically as well as through utilizing limit equilibrium analyses. The excavation category was determined to range from hard to extremely hard ripping. Remedial measures for unstable rock slopes are discussed.