Abstract
Geo-composite having a drainage function is often used for stabilizing cohesive soil embankment. In conventional design, only an effect of accelerating consolidation is evaluated. However, it is considered that geo-composite can reinforce cohesive soil when effective confining pressure applied to the soil surrounding geo-composite is large enough and geo-composite has high tensile strength and stiffness to restrain soil deformation.
In this study, pull-out tests using a geo-composite were carried out in order to understand the behavior of geo-composite in a cohesive soil. In a series of tests, two types of cohesive soil having different dilatancy were used. The results from the laboratory test showed that pull-out resistance of geo-composite in the cohesive soil exhibiting positive dilatancy is larger than one in the cohesive soil exhibiting negative dilatancy.
