LARGE-SCALE EXPERIMENTS ON STABILITY OF TEMPORARY STRUCTURES AGAINST WAVES

Abstract

 The efficient and effective implementation of temporary structures such as sandbags, etc. for emergency restoration of damaged seawalls is being promoted in preparation for successive typhoons. However, there have been few studies on the stability of temporary structures on seawalls against waves. In this study, we performed large-scale hydraulic experiments to evaluate the stabilities of sandbags installed on seawalls. The experimental results showed that the damage rate of single-row, single-tiered sandbags is proportional to the wave pressure and that sandbags are more likely to be moved by tipping than sliding. The stability of sandbags was calculated by shifting the center point of the moment of force from the rear end of the bottom to the front, which was consistent with the experiment. In addition, we clarified the stabilities and damage mechanisms of multiple sandbags and connected sandbags.