Abstract
We tried if the mechanical model which we propose could apply to the prediction of the deformation of a reinforced soil walls. As a result, the value calculated by the mechanical model agreed approximately with the deformation of the reinforced soil wall. As the next step, we examined the creep deformation of a reinforced soil wall by model experiment. The creep deformation of a reinforced soil wall was not proportional to earth pressure. The centre in the reinforced soil wall became a maximum. We also examined if the mechanical model which we propose could apply to the prediction of the creep deformation of a reinforced soil wall. Consequently, calculated values approximately agreed with the actual deformation of the reinforced soil wall. These results can be utilized for the design method of reinforced soil walls taking into account of deformation.