Geotechnical investigation of a landslide: A case in Betic cordillera

The aim of this study is to investigate an actual landslide area in Betic Cordillera, Granada, Spain. For that purpose, firstly literature review is given on landslide types and processes that drive them. For the same purpose, the landslide area and surrounding are investigated geologically and tectonically. After a detailed field studies, including morphological and geological mapping, drilling work, Schmidt test in-situ and laboratory tests are performed for determination geotechnical characteristics of the study area. The collected laboratory and in-situ data is then utilized for stability analysis of the landslide area using SLOPE/W software. The slope stability factors of safety are calculated for the unstabilized slope, stabilized slope with the anchor and stabilized slope with the pile under static and dynamic conditions. The stability of slope specified by a factor of safety before and after stabilization is compared in this study. Furthermore, probabilistic analysis perform for each case in this study. Also, a sensitivity analysis is conducted for the effects of the critical parameters. Lastly, It is investigated the cost comparison of using the anchor or the pile for the current slope. Consequently, it is point out that based on assumptions made in study area, the stability problems particularly would be likely under dynamic conditions and generally mass movements are expected to occur between the crushed zone (Layer 2) of Layers 1 and 3. That area has residual shear strength parameters and it plays an important role in this landslide area. Some part of this work was conducted in Granada, Spain as a student within the Erasmus exchange program.