Evaluation of liquefaction susceptibility based on peak dilatancy and particle shape characteristics
19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017, Seoul, Güney Kore, 17 - 22 Eylül 2017, cilt.2017-September, ss.1481-1484, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 2017-September
- Basıldığı Şehir: Seoul
- Basıldığı Ülke: Güney Kore
- Sayfa Sayıları: ss.1481-1484
- Anahtar Kelimeler: Cyclic mobility, Dilatancy, K0 consolidation, Liquefaction susceptibility, Sand
- Boğaziçi Üniversitesi Adresli: Evet
Özet
This study investigates the influence of soil dilatancy on liquefaction susceptibility. For this purpose, cyclic simple shear tests were conducted on clean sand samples prepared at different unit weight-vertical stress combinations. Tests were conducted on two different sand types and liquefaction susceptibility was defined in terms of the number of cycles of loading until liquefaction. In these tests, potential dilatancy of each sample was calculated empirically as a function of soil density and in-situ stress state. As the tests were repeated at different density-stress combinations, potential peak dilatancy and liquefaction susceptibility relationship was obtained for the soil under investigation. Obtained relationship was valid for the selected cyclic stress ratio and cyclic frequency. Then the tests were repeated at different combinations of cyclic stress ratio and cyclic frequency to quantify their influences on the dilatancy - liquefaction susceptibility relationship. Obtained results were used to investigate the influence of particle shape characteristics on liquefaction susceptibility.