Parameters affecting performance of fully instrumented model testing of strip footings on geocell-reinforced soils
      
Yazarlar (3)
Sarper Demirdöğen
Gazi Üniversitesi, Türkiye
Ayhan Gürbüz Gazi Üniversitesi, Türkiye
Dr. Öğr. Üyesi Kaan YÜNKÜL Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Geotextiles and Geomembranes (Q1)
Dergi ISSN 0266-1144 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili Türkçe Basım Tarihi 12-2024
Cilt / Sayı / Sayfa 52 / 6 / 1191–1206 DOI 10.1016/j.geotexmem.2024.08.002
Makale Linki http://dx.doi.org/10.1016/j.geotexmem.2024.08.002
Özet
A thorough study was conducted to assess the performance of the strip footing reinforced with geocells in sand, focusing on understanding the enhancement effects and geocell reinforcement mechanisms. Critical factors such as geocell modulus, height, soil relative density and load eccentricity were examined through fully instrumented model tests. Measurements included surface displacement profiles, strains on the geocell layer, subsurface pressure distribution and other relevant parameters. Results revealed that the strip footing on geocell-reinforced sand beds exhibited better performance compared to those on unreinforced soil, characterized by increased load-carrying capacity and reduced settlements. Notably, stiffer geocells improved performance significantly, with a 40% higher modulus enhancing the bearing pressure by up to 25%, due to better confinement and anchorage effects. Conversely, geocells with a lower modulus demonstrated more effective vertical stress distribution. Furthermore, increased geocell height moderately enhanced footing performance by improving confinement, although wall buckling under eccentric loading limited major gains. Dense soils under centric loading exhibited up to a 20% better improvement in bearing pressure than loose soils due to higher strain mobilization within the geocell layer. These findings highlight the crucial role of geocell and soil properties, as well as loading conditions, in optimizing reinforcement effects for strip footings.
Anahtar Kelimeler
Geocell | Geosynthetics | Model test | Pressure cell | Strain gauge | Strip footing