Dynamic model tests on the babadağ-gündoğdu landslide (Denizli-turkey)

Abstract

Long term creep like Gündoğdu landslide which is moving in various annual rates along the dip direction of bedding planes of sandstone-marl layers is seen in Babadağ town of Denizli city. In this study, the sliding behavior of Gündoğdu landslide was investigated by means of laboratory tests on a slope model which was prepared in accordance with in-situ geological conditions. For this purpose, series of laboratory tests including tilting tests and dynamic shaking table tests were carried out. According to tilting test results average values of measured static and calculated kinetic friction angles were determined as 33.8° and 31.13° respectively. Recorded total AE activity for block slide in tilting and dynamic tests were determined as 3.57 for 68.4 mm and 54.2 for 101.2 mm as average values respectively. Critical acceleration values for planar sliding of upper block were determined as 0.45g and 0.22g for the dip angles 16° and 24° of sandstone and marl succession respectively. Block displacements which were developed under dynamic cyclic loads were calculated by a computer program and compared with measured displacements. If obtained critical accelerations develop in the study area in case of a possible earthquake, ongoing mechanism of the Gündoğdu landslide could be affected or triggered. © 2019 Taylor & Francis Group, London.