The effects of geological structures between Sarısu-Kemer (Antalya) on possible engineering problems

In this study, which was conducted to investigate the effects of geological structures between Sarısu and Kemer of Antalya on possible engineering problems, the slopes in and around the highways were examined. The discontinuity properties of these slopes were examined and their stability was determined by kinematic analysis. The units in the study area consist of rock units that have been formed from Precambrian to the present day. These rock units show allochthonous structure and are called Antalya Nappes or Antalya Units. Antalya Nappes from bottom to top; It consists of Çataltepe Nap, Alakırçay Nap, Tahtalıdağ Nap, and Tekirova Ophiolite Nap. Tertiary-Quaternary sediments cover these units. The slopes where the discontinuities are measured are generally located in Tahtalıdağ Nap and Kırkdirek formation within Tekirova Ophiolites. In the rock masses in the study area; the discontinuities are generally classified as: close, medium and partly wide spaced; generally unfilled and partially filled; medium wide, medium narrow, narrow span; 2nd, 3rd and 4th class of rough-wavy and medium-high continuity rock masses. Kinematic analyzes were carried out at four locations on the slopes that form rock units in the study area to determine possible kinematic controlled slope instability. Accordingly, no instability with discontinuity control is expected in slopes 1, 2 and 3. In the slopes in other locations; It has been determined that there can be planar slip in slopes 4, 5 and 7, planar and wedge type defeat in slopes 6, 8 and 11, only wedge type defeat in slopes 9 and 10. On the slope 12 which is at forth location, it was determined that a flattened defect occurred along the fault plane with 55/028 stance, and the causes and results of this defeat were examined. In this study, possible slope orientations and locations where planar and wedge-type instabilities may develop were determined as a result of kinematic analysis. These evaluations showed that 4, 5, 6, 7, 8, 9, 10 and 11 slopes were unstable. Without changing the current slope direction, it has been determined that by reducing slope direction to 650, 460, 770, 360, 530, 600, 710, 680 instability problems due to discontinuities will disappear. It has been determined that the instability in the planar slip type seen on the slope 12 is a slip in the northeast direction and this slip is the normal fault plane with 58/028 posture, which has the same position as the slope surface.