Abstract
The characteristics of interaction between cohesive soil and geogrid is investigated on the basis of the pull-out test results of geogrid in soil. The pull-out resistance acting between cohesive soil and geogrid can be divided into two parts; the one is dependent on a displacement of geogrid while the other is independent of it. The analytical method introducing its characterististics of interaction between cohesive soil and geogrid into a finite element method is proposed and its validity is verified. From the comparison between the analytical values and the measured or experimental values, it is proved that the behavior of reinforced cohesive soil ground by geogrid can be analysed well by means of the proposed method.