Integrated engineering-geological and numerical approach applied to the large Buyukcekmece (Turkey) landslide for evaluating earthquake-induced effects
12th International Symposium on Landslides, Napoli, İtalya, 12 - 19 Haziran 2016, ss.1375-1382, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası:
- Doi Numarası: 10.1201/b21520-168
- Basıldığı Şehir: Napoli
- Basıldığı Ülke: İtalya
- Sayfa Sayıları: ss.1375-1382
- İstanbul Üniversitesi-Cerrahpaşa Adresli: Hayır
Özet
The Buyukcekmece landslide, W of Istanbul (Turkey), was selected for MARSite project (New directions in seismic hazard assessment through focused Earth observation in the Marmara Super-site) as case-study of earthquake-induced landslides. The local seismic response of the landslide slope was analyzed reconstructing a detailed engineering-geological model. Geophysical measurements were carried out to constrain geometries and attribute mechanical properties. A multisensor in-hole monitoring system and a local GPS-RTK network were installed since October 2014. The collected records show piezometer trends related to seasonal as well to intense rainfalls and confirm a continuous EW movement of the landslide; 65 recorded earthquakes demonstrate an amplification due to the landslide mass. Slope stability was analyzed through an unconventional pseudostatic approach by considering different seismic waveforms. Stress-strain numerical models indicate that local seismic response is jointed to the geological setting and the interaction between seismic waves and slope is not negligible to evaluate possible landslide reactivations.