INVESTIGATION OF EPS-GRANULAR SOIL INTERFACE INTERACTION BY LARGE SCALE DIRECT SHEAR TESTS


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Gülen M. , Kiliç H.

Dokuzuncu Ulusal Geosentetikler Konferansı, İstanbul, Turkey, 23 - 24 June 2022, pp.1-12

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.1-12

Abstract

In geotechnical engineering applications, different geosynthetics are used to ensure the usability of the structure throughout its service life, increase the expected performance and reduce the cost. One of the geosynthetics with different properties that have emerged with current technological developments is the expanded polystyrene (EPS) material, which has a low density and high compressibility. There are usage areas such as road underfill, buried pipe systems, retaining walls, and slope stability. When the usage areas are taken into consideration, it is seen that the EPS material interacts with the soil. It is essential to determine the EPS-soil interface interaction by considering different loading conditions and soil properties in designing these structures. This study determined the interface shear strength parameters of three poorly graded granular soils and two different densities of EPS material by large-scale direct shear box tests. Thus; d, ca, and d/f values were determined for applications with EPS-soil interaction.