Author: Devrim ERDOĞAN, Selim ALTUN
Publishing Date: 2008
Volume 23 Issue 2
Recently, in geotechnical engineering field, applications of geosynthetics are gettingrather more common. Geosynthetics are capable of overcoming a number of problems includingseperation, filtration, drainage, reinforcement; which multiple functions can be fulfilled once at atime. Particularly, application of a type of geosynthetics, namely, geotextiles, which are possessing rather high tensile strength, lead to increase in the shear strength of soil, hence, soils strengthenedwith geosythetics are named as reinforced soil.
In particular, many studies in the literature are related with the investigation of the rate of increase in soil strength by application of geosynthetic materials, which are used for increasing thestability and reinforcing the subgrade material in highway construction. In the scope of this study,the effect of geotextile type on the rate of increase in stability of sandy soils, is investigated understatic loading onditions. Shear box tests on specimens prepared by inclusion of geotextiles of different types and properties, were carried out to assess the rate of variation in sand shear strengthproperties. It was observed that geotextile type, grain size distribution, relative density of sand andthe test parameters cause drastic variations in the sand / geotextile interface shear strength behaviour.
Key Words: Sand; geotextiles; direct shear test; interface friction angle; interface coefficient of friction.