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Denizli
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. 1 Introduction Landslides are widely known major geologic hazards and threatening people all over the world. Babadağ town is located in 40 km northwest of Denizli city and it has been exposing to creep like slope movement since 1940 (Figure 1). Effects of the movement in the Gündoğdu district can be classified as; tilting and settling of the buildings, damages on buried life-line systems, deformation of roads and pavements. Moreover, crackings of walls are very typical and clearly observed. The mechanism and factors, which contribute to the Gündoğdu slope movement, have been investigated by Tano et al. 2003; Aydan et al. 2003; Kumsar et al. 2004; Çevik 2003; Çevik and Ulusay 2005; Tano et al. 2006a; Tano et al, 2008; Çelik et al. 2011; Kumsar et al. 2012, Çelik 2012; Kumsar et al. 2016a.
acceleration value, AE activity, AE count, Aydan, babadağ, babadağ town, discontinuity, displacement, Earthquake, friction angle, gündoğdu landslide, kinetic friction angle, kumsar, landslide, pamukkale university, Reservoir Characterization, structural geology, table test, tano, Turkey, ulusay, University, Upstream Oil & Gas
SPE Disciplines: Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (0.34)
Abstract: The Güney Waterfall in Denizli was ruptured by the The 21 July 2003 Buldan earthquake with magnitude 5.6. The ruptured block toppled after 10 years and traveled towards the reservoir of Cindere Dam more than 132 m. The authors attempt to clarify the mechanism and process of the toppling failure of the ruptured block. The authors attempt to analyse the failure process in fundamentally in three stages. The first stage is the initial failure caused by the earthquake. The second stage is the growth of the ruptured block and progress of degradation at the toe of the failed block. Third stage is the final collapse and movement in the valley towards the Cindere Dam reservoir. The pre-rupture stage before the Buldan earthquake and post-rupture and final collapse conditions are analysed through some analytical and numerical techniques to understand the fundamental causes of the failure, which took more than 10 years. This is study is unique in a sense it involves slow and rapid dynamic processes. The authors present the results of the various studies and investigations undertaken so far and and they discuss their implications. 1 Introduction The 21 July 2003 Buldan earthquake with magnitude 5.6 ruptured the Güney Waterfall in Denizli, which is the 23 natural beauty of Turkey. However, the ruptured block of the Güney Waterfall did not toppled at that time. The ruptured block toppled after 10 years and traveled towards the reservoir of Cindere Dam more than 132 m. The initially ruptured block has a prism-like shape with 34m width, 20 m length and 12 m height. Since the 2003 Buldan earthquake, several earthquakes with a moment magnitude more than 5 occurred in the vicinity of the Güney Waterfall, which may further cause at the toe of degradation and additional damage.
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