Kazi Palye Yüksekli̇ği̇, Kazi Şev Eği̇mi̇ Ve Yeralti Suyu Deri̇nli̇ği̇ni̇n Düşük Mukavemetli̇ Kaya Kazilarinin Stabi̇li̇tesi̇ Üzeri̇ne Etki̇leri̇ni̇n Araştirilmasi

Abstract

In this study, effects of berm heights, excavation slope gradients and groundwater depths on the stability of designed excavations as well as variations on the safety factors of the excavation slopes are investigated. In the study, 3 different berm heights (5m, 10m and 15m) and 2 berms usually preferred and faced at the slope excavation applications were taken into consideration. So, for instance, for a 10 m berm height, total slope height to be analyzed will be a 30m high due to for 2 berms. In addition, depending on these 3 different berm heights (5m, 10m and 15m), 3 different slope excavation gradients (450, 550 and 650) were also defined in the modeling. Then, for these 9 different slope excavation designs, 3 different groundwater depths were also additionally attained in the analyses. Numerical seepage analyses were performed on totally 27 different modal types. Location of phreatic water seepage lines and pore water pressure values as well as safety factors of the excavation slope failure surfaces were analyzed depending on berm heights, excavation gradients and groundwater locations for 27 different excavation and slope scenarios. This study showed that when berm heights are increased, then safety of the slope excavations is decreased.