Original scientific paper
https://doi.org/10.17794/rgn.2017.4.4
PRELIMINARY RESULTS OF DETERMINING THE FRICTION INTERACTION COEFFICIENT BETWEEN CRUSHED STONE AND POLYESTER STRIP
Karolina Gradiški
; University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering (Pierottijeva 6, HR-10000 Zagreb, Croatia, PhD Student)
Mensur Mulabdić
; Faculty of Civil Engineering Osijek (Vladimira Preloga 3, 31000 Osijek, Croatia, Full Professor)
Krunoslav Minažek
; Faculty of Civil Engineering Osijek (Vladimira Preloga 3, 31000 Osijek, Croatia, Assistant Professor)
Abstract
In the past twenty years in Croatia a number of reinforced earth constructions have been built, of which two reinforced earth walls stand out due to their dimensions: Strikići and Sveta Trojica. In the building of these walls polyester strips were used as reinforcement elements, whereas as fill material crushed stone aggregate was used. For designing these constructions knowledge about the interaction mechanisms between the polyester strip and the soil is required. So far, most of the published studies have been directed to the determination of the friction interaction coefficient of the polyester strip and the fill material which was sand or gravel, whereas tests on the interaction between the geosynthetic strip and the crushed stone aggregate have not been performed. In order to determine the friction interaction coefficient between the crushed stone aggregate which is commonly used as fill material and the geosynthetic strip pull-out tests of the polyester strip were carried out. Apart from pull-out tests, large direct shear tests were performed to determine shear strength parameters of crushed stone strength. Predictions from the numerical model were compared to a series of pull-out tests, proving that the numerical model provides reasonable predictions of pull-out behavior.
Keywords
Geosynthetic strip; crushed stone; pull-out test; large direct shear test; numerical analysis
Hrčak ID:
187748
URI
Publication date:
11.10.2017.
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