ABSTRACT
This chapter analyses a road slope located in the central part of Portugal, showing unstability problems. The most frequent or the worst unstability situations that have occurred were identified. The rock blocks are originated by the intersections of the main joint sets: stratification joints. The rock slope’s stability behaviour was studied using a geomechanical classification. A classification adopted from the Romana system—Slope Mass Rating (SMR) was used to define the slope’s unstable sectors. The SMR and its possible adaptations do not constitute the exclusive methods of rock slopes stability study. Other geomechanical classifications and more accurate methods of analysis should be used. The slope sections were defined from partially stable to unstable according to the SMR system. The SMR obtained ‘‘in situ’’ was slightly different as both sections were considered as partially stable.
