DEVELOPMENT OF LABORATORY EXPERIMENT SYSTEM TO UNRAVEL THE EFFECT OF THE FREEZE OF GEOMATERIAL ON GEOSYTHEIC REINFORCEMENT

As a measure against frost heaving of reinforced soil wall, setting an anti-freezing layer or insulation behind wall facing is recommended in design guidelines and manuals nowadays. However, the reinforced soil walls which were built before the guidelines decided, are difficult to evaluate the risk of deformation caused by frost heaving of geomaterial. In this research, a new model test system has been developed which can measure the strain on reinforcement material caused by frost heaving. As a result, it was found that the strain on reinforcement material is changed by the vertical stress on reinforcement material, the frost heaving property of geomaterial and the frozen region around the reinforcement material.