The Influences of Micro-Mechanical Properties of Cohesionless Soils on Active Failure Surface Geometries Kohezyonsuz Zeminlerin Tane Dağılım ve Şekil Özelliklerinin Aktif Göçme Yüzeyi Geometrisine Etkileri
Teknik Dergi/Technical Journal of Turkish Chamber of Civil Engineers, cilt.30, sa.5, ss.9399-9420, 2019 (SCI-Expanded, Scopus, TRDizin)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 30 Sayı: 5
- Basım Tarihi: 2019
- Doi Numarası: 10.18400/tekderg.397658
- Dergi Adı: Teknik Dergi/Technical Journal of Turkish Chamber of Civil Engineers
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
- Sayfa Sayıları: ss.9399-9420
- Anahtar Kelimeler: Dilatancy angle, PIV, physical model, failure surface, retaining wall
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Boğaziçi Üniversitesi Adresli: Evet
Özet
The geometry of active failure surface is influenced by the dilatant properties of granular backfills. Stress-dilatancy functions available in the literature suggest that dilatant behavior is dependent on relative density and the state of stress. However, because physical modelling studies investigating the influence of these variables were conducted under small stresses and without considering macro-mechanical properties of soils, a new small-scale 1g physical retaining wall model that can translate to active state and apply vertical surcharge is designed. Using this setup, physical model tests using three different granular backfill materials were conducted under various density and stress state combinations. Images from these tests were analyzed using particle image velocimetry method (PIV) and failure surface geometries were defined. Thus, it was possible to study the influences of mean grain size, particle shape, and surcharge on failure surface geometries.