CHANGES IN THE DEFORMATION MODE OF THE SUBGRADE REACTION ACTING ON THE FLEXIBLE WALL RECEIVED LATERAL LOAD

Generally, the behavior of the subgrade reaction of the flexible wall under the lateral load depends on the deformation mode of the wall. Furthermore, structures such as walls are predominant in two-dimensional behavior, but when this is handled in model experiments, the stress state in the model ground is affected by the friction between the ground and the rigid container’s surface. In this study, several loading experiments using two-dimensional model ground were conducted. The model ground was simulated with aluminum rod laminate. The deformation mode of the wall was changed by the balance of the loading level at the two loading points (x=0 mm and -150 mm). In addition, the deformation state of the ground was compared by photographing it during the experiment. As a result, it was found that the subgrade reaction differ behavior in the depth direction depending on the deformation mode. When evaluated this behavior using the coefficient of subgrade reaction, it was shown that its distribution differs in the depth direction. Also, the degree and spread of shear strain differ in the ground behavior.