EVALUATION OF FRICTION CHARACTERISTIC OF STEEL STRIPS-REINFORCED SOIL WALL USING A SMALL PULL-OUT TEST APPARATUS FOR THE USE OF CONSTRUCTION SITE

soil. However, it has not been possible to evaluate the actual frictional characteristic of reinforced soil walls with different backfill soil materials on each construction site. In this study, we developed a small and simplified pull-out test apparatus that can be used to evaluate the friction characteristic of steel strips-reinforced soil walls for the use of construction site. We also confirmed the reliability of our developed testing as compared with the field pull-out tests. Furthermore, we propose a method for evaluating the friction characteristics of backfill materials on site before construction, in order to ensure required quality.