Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Orta Doğu Teknik Üniversitesi, Faculty of Engineering, Department of Geological Engineering, Turkey
Approval Date: 2004
Student: ÖZGÜR AVŞAR
Supervisor: HALUK AKGÜN
Abstract:A landslide occurred during the construction of the Giresun ا Espiye road between Km: 1+030 ا 1+170 in April 2003. Investigating the causes and mechanism of this slope failure along with suggesting a proper stabilization technique is aimed in this study. For that purpose, a detailed site investigation study, including engineering geological mapping, drilling work, in situ and laboratory tests, was performed. Weathered tuffite, tuffite, flysch and dacitic tuffite, from top to bottom, are the major units in the study area. A أtranslational slideؤ occurred in completely weathered tuffite owing to the disturbance of the stability of the slope by the excavations performed at the toe of the slope; particularly the foundation excavation for the restaurant building and for the road cut for the Giresun ا Espiye road. After establishing the model of the landslide in detail, shear strength parameters of the failure surface were determined by the back analysis method as "cohesion"=2.5 kN/m2 and "friction angle"=9°. Toe buttressing, ground water and surface water drainage options were considered for stabilizing the slope. For the back analysis calculations, the Morgenstern-Price and Spencer methods were used with the aid of the SLOPE/W computer program.