Akademik Veri Yönetim Sistemi
Gumushane Universitesi Fen Bilimleri Dergisi, cilt.15, sa.4, ss.963-977, 2025 (Scopus, TRDizin)
This study focuses on the investigation of landslides occurring during the construction of the 900-bed City Hospital in Altınordu District of Ordu Province and aims to develop engineering solutions to ensure stability. Within the scope of the field studies, 25 boreholes were drilled, and both field and laboratory tests were conducted to determine the physical and mechanical properties of the soil and rock units. Borehole data revealed that the study area consists of silty clay on the surface, followed by weathered tuff, claystone/marl and low-strength andesite at the base. Two-dimensional limit equilibrium analyses were conducted along two sections within the landslide area. The Mohr-Coulomb failure criterion was considered for soils and the Hoek-Brown failure criterion for rock masses. Analyses based on Bishop, Janbu ve Morgenstern-Price methods under seismic load conditions revealed that the current excavation slopes were unsafe, and a new excavation design including bored piles and retaining walls was proposed. In the analyses performed, the factors of safety were calculated using different methods, and the results were found to be in compliance with the requirements of the 2019 Turkish Building Earthquake Code. The analyses concluded that the proposed design effectively mitigates the landslide risk within the project area. Furthermore, drainage measures behind and in front of the bored piles were recommended, particularly in areas affected by seasonal surface and groundwater flow.