Annual Journal of Civil Engineering in the Ocean Vol.35
A RELATIONSHIP BETWEEN GRAIN SIZE CHARACTERISTICS AND LIQUEFACTION DEGREE ON AWAJI ISLAND COASTAL SAND BEACH
2019 Volume 75 Issue 2 Pages I_731-I_736
Details
2019 Volume 75 Issue 2 Pages I_731-I_736
On the coastal part of Awaji Island, there was a storm surge caused by typhoon 21 in 2018. In addition, there are concerns about the damage of the coastal zone due to the occurrence of the Nankai Earthquake. If such a large-scale earthquake occurs, the existing coastal structure may collapse due to liquefaction of the sandy beach.
In this study, we aims to grasp the spatial features of the coastal beach on Awaji Island by analyzing the image to understand the characteristics of the particle size and shape of the coastal sandy beach of Awaji Island and considering the liquefaction characteristics by shaking table experiment.
From the results of this study, as a spatial feature of the coastal sandy beach of Awaji Island, sand with large particle size is distributed on Osaka bay side, but the shape is rounded as a whole. Also, there was a tendency to liquefy as it approached a true circle. Especially, sand on the Kii Channel side is easier to liquefy than sand in other areas.
