CHANGES IN THE DISTRIBUTION OF SUBGRADE REACTION COEFFICIENT DUE TO DIFFERENCES IN THE DISTRIBUTION OF HORIZONTAL EXTERNAL FORCE ACTING ON THE PILE

Abstract

 Horizontal loading experiments of the pile were conducted with the aim of evaluating changes in subgrade reaction behavior due to differences in deformation mode of the pile from the distribution of subgrade reaction coefficients. As a result, there was no significant difference in the behavior of the subgrade reaction when the horizontal external force loading position on the pile was higher than the ground surface. However, it was found that the value of the coefficient of subgrade reaction appears small when the loading position is deeper than the ground surface. Then, such a distribution of subgrade reaction coefficient was applied to the behavior of piles used in steel pile reinforced breakwater. As a result, the validity of this method was confirmed when the deformation mode of the pile was relatively similar to that of the horizontal pile-head loading experiment. It was also considered necessary to take into account that if the deformation mode of the pile is significantly different from that of the horizontal pile-head loading tests, the coefficient of subgrade reaction should be smaller, as confirmed by the horizontal pile-head loading experiments.